MENU

/
/
The method of adjusting the r angle of the directly forming to square pipe mill when making pipes

The method of adjusting the r angle of the directly forming to square pipe mill when making pipes

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2022-08-14 11:30
  • Pvs:

【概要描述】When the square tube is manufactured by the directly forming to square pipe mill, the r-angle symmetry and the same size of the square tube are important conditions to measure the external beauty of the square tube, and it also affects the subsequent assembly requirements of the finished tube tooling.

The method of adjusting the r angle of the directly forming to square pipe mill when making pipes

【概要描述】When the square tube is manufactured by the directly forming to square pipe mill, the r-angle symmetry and the same size of the square tube are important conditions to measure the external beauty of the square tube, and it also affects the subsequent assembly requirements of the finished tube tooling.

  • Sort:Information
  • Auth:
  • Source:
  • Release time:2022-08-14 11:30
  • Pvs:
Detail

When the square tube is manufactured by the directly forming to square pipe mill, the r-angle symmetry and the same size of the square tube are important conditions to measure the external beauty of the square tube, and it also affects the subsequent assembly requirements of the finished tube tooling.

 

To According to international standards, if there is no special requirement, the r angle of the finished pipe should be adjusted according to 1.5t (wall thickness). However, in actual production, the four r angles are often unequal. Some customers will require the r angle to be greater than 1.5 or less than 1.5 wall thickness according to the use of the finished pipe. Therefore, the manufacturer is required to effectively control the r angle according to the process requirements to meet different needs.

 

When using the directly forming to square pipe mill to manufacture square rectangular pipes, there are three adjustments for the r angle greater than 1.5 or less than 1.5 wall thickness.

 

Adjustment of r<1.5t

(1) Increase the bandwidth and reduce the r angle. According to the calculation formula of the material width of the circular variable square tube:

 

Directly forming to square pipe mill

 

In the formula, for a specific welded pipe, A, B, t and △ are fixed values. To make r smaller, the most direct way is to increase C. After the width of the tube blank is widened, the increase will make the round tube larger before the square is rounded, and more material will fill the gap at the corner of the rectangular tube pass. The more the filler, the sharper the corner.

 

Adjustment of r>1.5t

The adjustment method is opposite to the above-mentioned situation.

 

r angle symmetry adjustment

Judging from the practice of manufacturing square rectangular tubes with directly forming to square pipe mill, the difficulty of controlling the r angle of the square rectangular tube is not simply whether it is large or small, but whether it is symmetrical. The symmetry of the r angle, in addition to adjustment, is also closely related to the hole design.

 

There are three design methods for the angle r when designing the rectangular tube pass.

(1) Specific r-angle hole type. The characteristic of the obliquely specific r-angle pass is: each roll pass is composed of five arcs, that is, two main deformation arcs and three r arcs are connected by tangent, and the pass is gradually designed to be a specific The r angle.

The only advantage of this pass is the high accuracy of the r-angle, and the four corners are easy to be symmetrical and equal, but this is also its fatal shortcoming-a set of rolls can only produce the only rectangular tube with the r-angle shape. Unless the customer has special regulations and requirements for the r angle, such a design is generally not made.

 

(2) Sharp-angle hole type. The characteristic is that the hole-shaped arc intersects the arc. The advantage of this type of pass is strong adaptability. The same pass can meet the requirements of different customers for different fillets. By controlling the width of the tube blank and proper on-site adjustment, it can completely ensure that the four corners of the rectangular tube are within a certain accuracy range. Symmetry is equal. However, this requires relatively high requirements for the commissioning personnel. If the adjustment is improper, even a hole with a specific r-angle may produce a rectangular tube with asymmetrical four corners.

 

(3) No angle hole type. The characteristic is that the hole pattern lines do not intersect, and the r-angle does not exist. For example, the hole pattern for the universal arch deformed rectangular tube and the hole pattern that uses the Turkish head method to participate in the deformation. This type of hole pattern is actually the inheritance and development of the sharp-angled hole pattern.

 

There are four basic forms and adjustments for the unqualified r angle when making square rectangular tubes with directly forming to square pipe mill:

(1) The adjustment of the lateral r angle of the rectangular tube that does not meet the standard.

 

 

Directly forming to square pipe mill

 

As shown in the first case in the above figure, r2 and r4 are too large for the obliquely exiting square tube. The main adjustment measures are:

Properly loosen the vertical roller, and at the same time properly press down the flat roller (whether or not the last flat roller is also pressed depends on the tolerance). When the tolerance is in place, loosen the first few vertical rollers a little to keep the last flat vertical roller basically stationary . It is also possible to separately press down one or two flat rollers with little change in r angle after passing through the flat roller hole type according to the specific situation. If r2 and r4 are too small, reverse adjustment is performed.

 

(2) Adjust the vertical angle r of the rectangular tube that does not meet the standard.

Directly forming to square pipe mill

In the second case of the above figure, the oblique rectangular tube r1 and r3 are too large. The guiding ideology of the disposal method is to relax the flat roll and gather the vertical roll as the basic adjustment method, and directly roll the small roll gap with the edge of the vertical roll pass. Angle r1 and r3. The purpose of relaxing the flat roll is to increase the upper and lower dimensions of the tube blank to facilitate the rolling of the vertical roll pass edge to reduce r1 and r3; the second is to achieve a relative reduction of r1 and r3 by increasing r2 and r4; the third is to reduce r1 for the vertical roll And r3 prepare more materials.

 

(3) Adjust the angle r on the lateral side of the rectangular tube that does not meet the standard.

 

Directly forming to square pipe mill

 

If r4 is too large (as shown in the figure above), after observing and analyzing the specific situation, you can try to make the following adjustments:

① properly press down the flat roll on the side of r4, and directly roll the small r4;

② You can also move the penultimate first and second vertical rollers a little in the direction of r4. This action actually forces the angle of r4 to drill into the gap of the flat roller on the side of r4, thereby aggravating the rolling of the edge of the side pass to the angle of r4. Braking force, reduce r4.

 

(4) The adjustment of the upper (lower) angle r of the rectangular tube is not up to the standard.

 

 

Directly forming to square pipe mill

 

If r1 is too large (as in the fourth case in the above figure), on the basis of fully observing and analyzing the current situation of the sizing roller, the following adjustments can be made:

①Appropriately narrow the upper roll gap of the vertical roll to increase the rolling force at the r1 corner of the rectangular tube at the upper edge of the vertical roll pass, thereby reducing r1;

②Appropriately lower the penultimate vertical roll. This action is actually to increase the rolling force at the angle r1 of the rectangular tube at the upper edge of the vertical roll pass and reduce r1.

③Raise the upper roller. If the r1 of the nth to the vertical roller is too large, the n-1th flat roller can be properly raised.

 


Part of the content of this site comes from the Internet. This site only provides information storage. The copyright belongs to the original author. It does not bear the relevant legal responsibility and does not represent the views and positions of this site. Please contact and delete it if there is any infringement.

关键词:

More News

Application of high precision steel pipe produced by pipe welding machine in modern industry
Application of high precision steel pipe produced by pipe welding machine in modern industry
The high-precision steel pipe produced by pipe welding machine is widely used in modern industry, and its production process and quality control requirements are strict. The following is a summary of the relevant technical points and application scenarios:

1. The characteristics of high-precision steel pipe
High dimensional accuracy: small outer diameter, wall thickness tolerance (usually up to ±0.05mm), low ellipticity.
Excellent surface quality: smooth weld without burrs, surface finish Ra≤0.8μm.
Stable mechanical properties: weld strength close to the base material, uniform compressive/tensile properties.
Applicable materials: stainless steel (304/316L), carbon steel, alloy steel (such as API series), etc.

2. Core production process
(1) Type of pipe welding machine
High-frequency welding (HFW) : high efficiency, suitable for medium thin wall pipe (Φ10~Φ600mm), need to cooperate with precision forming unit.
Laser welding: small heat affected zone, narrow weld (0.1~0.3mm), suitable for ultra-thin walls (such as 0.3mm) or special alloys.
TIG welding: For high alloy steel or thick wall pipe, higher weld purity.
(2) Key process links
Forming process: multi-roll continuous cold forming, dynamic adjustment of roll parameters to compensate for rebound.
Welding control:
High frequency welding: precise control of current frequency (100~400kHz) and extrusion amount.
Laser welding: focus position accuracy ±0.05mm, real-time depth monitoring (such as CCD vision).
Online detection:
Eddy current inspection (ET) : Detection of surface cracks.
Ultrasonic inspection (UT) : detection of internal defects (sensitivity Φ0.5mm equivalent flat hole).
Laser caliper: Outer diameter closed loop control (accuracy ±0.01mm).

3. Post-processing technology
Heat treatment: bright annealing (hydrogen nitrogen protection atmosphere) to eliminate stress, hardness fluctuation ≤3HRC.
Straightening: multi-roll precision straightening, straightness ≤0.5mm/m.
Surface treatment:
Electrolytic polishing (EP) : For medical/food grade stainless steel tubes, Ra up to 0.2μm.
Coating: hot dip galvanizing (zinc layer ≥80μm) or electroless nickel plating (uniform thickness ±2μm).

4. Typical application areas
Automobile manufacturing: fuel injection pipe (tolerance ±0.03mm), hydraulic pipe.
Semiconductor equipment: Ultra-high clean gas delivery pipe (inner wall EP treatment, particle ≤Class 5).
Medical instruments: endoscopic catheter (Φ1~5mm, wall thickness 0.1mm).
Energy industry: Instrument tubes for nuclear power plants (SA213-TP347H material, intergranular corrosion test passed).

5. Quality control standards
International standard:
ASTM A269 (Universal Seamless and Welded Austenitic Stainless Steel Pipe)
EN 10305-4 (Precision welded pipes for hydraulic systems)
Industry certification: ISO 9001, PED 2014/68/EU (Pressure Equipment Directive).

6. Technological trends
Intelligent production: AI algorithm optimizes welding parameters, and the yield is increased to more than 99.5%.
Composite process: laser + arc composite welding, both efficiency and quality (speed increased by 30%).
Green manufacturing: low energy high frequency power supply (efficiency ≥90%), waste acid recovery ≥95%.

Through the above process optimization and strict quality control, the high-precision steel pipe produced by the pipe welding machine can meet the demanding requirements of size, performance and reliability in high-end industrial fields. In actual production, the process route needs to be customized according to the material characteristics and uses, for example, medical tubes need to undergo additional passivation treatment and biocompatibility testing.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill 
Detail
The high-precision steel pipe produced by pipe welding machine is widely used in modern industry, and its production process and quality control requirements are strict. The following is a summary of the relevant technical points and application scenarios:

1. The characteristics of high-precision steel pipe
High dimensional accuracy: small outer diameter, wall thickness tolerance (usually up to ±0.05mm), low ellipticity.
Excellent surface quality: smooth weld without burrs, surface finish Ra≤0.8μm.
Stable mechanical properties: weld strength close to the base material, uniform compressive/tensile properties.
Applicable materials: stainless steel (304/316L), carbon steel, alloy steel (such as API series), etc.

2. Core production process
(1) Type of pipe welding machine
High-frequency welding (HFW) : high efficiency, suitable for medium thin wall pipe (Φ10~Φ600mm), need to cooperate with precision forming unit.
Laser welding: small heat affected zone, narrow weld (0.1~0.3mm), suitable for ultra-thin walls (such as 0.3mm) or special alloys.
TIG welding: For high alloy steel or thick wall pipe, higher weld purity.
(2) Key process links
Forming process: multi-roll continuous cold forming, dynamic adjustment of roll parameters to compensate for rebound.
Welding control:
High frequency welding: precise control of current frequency (100~400kHz) and extrusion amount.
Laser welding: focus position accuracy ±0.05mm, real-time depth monitoring (such as CCD vision).
Online detection:
Eddy current inspection (ET) : Detection of surface cracks.
Ultrasonic inspection (UT) : detection of internal defects (sensitivity Φ0.5mm equivalent flat hole).
Laser caliper: Outer diameter closed loop control (accuracy ±0.01mm).

3. Post-processing technology
Heat treatment: bright annealing (hydrogen nitrogen protection atmosphere) to eliminate stress, hardness fluctuation ≤3HRC.
Straightening: multi-roll precision straightening, straightness ≤0.5mm/m.
Surface treatment:
Electrolytic polishing (EP) : For medical/food grade stainless steel tubes, Ra up to 0.2μm.
Coating: hot dip galvanizing (zinc layer ≥80μm) or electroless nickel plating (uniform thickness ±2μm).

4. Typical application areas
Automobile manufacturing: fuel injection pipe (tolerance ±0.03mm), hydraulic pipe.
Semiconductor equipment: Ultra-high clean gas delivery pipe (inner wall EP treatment, particle ≤Class 5).
Medical instruments: endoscopic catheter (Φ1~5mm, wall thickness 0.1mm).
Energy industry: Instrument tubes for nuclear power plants (SA213-TP347H material, intergranular corrosion test passed).

5. Quality control standards
International standard:
ASTM A269 (Universal Seamless and Welded Austenitic Stainless Steel Pipe)
EN 10305-4 (Precision welded pipes for hydraulic systems)
Industry certification: ISO 9001, PED 2014/68/EU (Pressure Equipment Directive).

6. Technological trends
Intelligent production: AI algorithm optimizes welding parameters, and the yield is increased to more than 99.5%.
Composite process: laser + arc composite welding, both efficiency and quality (speed increased by 30%).
Green manufacturing: low energy high frequency power supply (efficiency ≥90%), waste acid recovery ≥95%.

Through the above process optimization and strict quality control, the high-precision steel pipe produced by the pipe welding machine can meet the demanding requirements of size, performance and reliability in high-end industrial fields. In actual production, the process route needs to be customized according to the material characteristics and uses, for example, medical tubes need to undergo additional passivation treatment and biocompatibility testing.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill 
The relationship between pipe welding machine and automobile frame manufacturing
The relationship between pipe welding machine and automobile frame manufacturing
The relationship between pipe welding machine and automobile frame manufacturing is mainly reflected in the production process, material selection and process optimization. The following is a technical analysis of the relationship between the two:

1.The role of pipe welding machine in the manufacture of automobile frame
Pipe production: The welding pipe machine is used to manufacture high-precision welded steel pipes, which constitute the longitudinal beams, beams, anti-collision beams and other key components of the automobile frame. High frequency welding (HFW) or laser welding technology can produce steel pipes with uniform wall thickness and strength of more than 800MPa to meet the needs of lightweight.
Customized processing: Through flexible forming technology, the welding machine can produce special-shaped cross section pipes (such as rectangular, trapezoidal), adapt to the topology optimization design of different models of frames, improve space utilization and impact energy absorption efficiency.

2.The core requirements of the welding pipe process for automobile frames
Material properties: DP600/DP800 duplex steel or 22MnB5 thermoforming steel should be used, and online heat treatment (such as induction annealing) should be carried out after welding to ensure the microstructure consistency between the weld zone and the base material and avoid HAZ (heat affected zone) softening.
Dimensional accuracy: Diameter tolerance should be controlled within ±0.2mm, ellipticity ≤0.5%, to ensure the matching accuracy of the assembly and stamping parts (clearance <0.5mm).

3.Key technology breakthrough point
Laser-MAG composite welding: the penetration depth can reach 8mm, the welding speed is increased to 6m/min, the heat input is reduced by 30%, and the welding deformation of the frame is significantly reduced (≤1.5mm/m).
Online quality monitoring: high-speed CCD vision system (sampling rate 2000fps) with eddy current detection, to achieve real-time detection of weld defects, miss rate <0.01%.

4.Cost-performance balance
Compared with the stamping and welding structure, the welded pipe frame can reduce the weight by 15-20%, the material utilization rate is increased to 95%, and the manufacturing cost of the bicycle is reduced by about 1200 yuan. However, it is necessary to increase the investment in roller forming molds (about 2 million yuan/set).

5.Industry Application Cases
- An independent brand pure level station adopts 3D variable cross-section welded pipe subframe, with torsional rigidity increased to 27000Nm/°, 40% higher than the traditional structure, and the battery pack space utilization increased by 12%.

Conclusion
The penetration rate of welded pipe technology in the field of automotive frames is growing at a rate of 8% per year, and future development directions include:
Intelligent welded pipe system (digital twin model real-time control molding parameters)
Magnesium alloy /CFRP composite pipe welding process
Topological optimization driven continuous forming technology for variable thickness pipes

It is recommended to pay attention to the update of the ISO 15614 standard and the latest certification requirements for automotive welded pipe processes in ASME BPVC Section IX to ensure technical compliance.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill 
Detail
The relationship between pipe welding machine and automobile frame manufacturing is mainly reflected in the production process, material selection and process optimization. The following is a technical analysis of the relationship between the two:

1.The role of pipe welding machine in the manufacture of automobile frame
Pipe production: The welding pipe machine is used to manufacture high-precision welded steel pipes, which constitute the longitudinal beams, beams, anti-collision beams and other key components of the automobile frame. High frequency welding (HFW) or laser welding technology can produce steel pipes with uniform wall thickness and strength of more than 800MPa to meet the needs of lightweight.
Customized processing: Through flexible forming technology, the welding machine can produce special-shaped cross section pipes (such as rectangular, trapezoidal), adapt to the topology optimization design of different models of frames, improve space utilization and impact energy absorption efficiency.

2.The core requirements of the welding pipe process for automobile frames
Material properties: DP600/DP800 duplex steel or 22MnB5 thermoforming steel should be used, and online heat treatment (such as induction annealing) should be carried out after welding to ensure the microstructure consistency between the weld zone and the base material and avoid HAZ (heat affected zone) softening.
Dimensional accuracy: Diameter tolerance should be controlled within ±0.2mm, ellipticity ≤0.5%, to ensure the matching accuracy of the assembly and stamping parts (clearance <0.5mm).

3.Key technology breakthrough point
Laser-MAG composite welding: the penetration depth can reach 8mm, the welding speed is increased to 6m/min, the heat input is reduced by 30%, and the welding deformation of the frame is significantly reduced (≤1.5mm/m).
Online quality monitoring: high-speed CCD vision system (sampling rate 2000fps) with eddy current detection, to achieve real-time detection of weld defects, miss rate <0.01%.

4.Cost-performance balance
Compared with the stamping and welding structure, the welded pipe frame can reduce the weight by 15-20%, the material utilization rate is increased to 95%, and the manufacturing cost of the bicycle is reduced by about 1200 yuan. However, it is necessary to increase the investment in roller forming molds (about 2 million yuan/set).

5.Industry Application Cases
- An independent brand pure level station adopts 3D variable cross-section welded pipe subframe, with torsional rigidity increased to 27000Nm/°, 40% higher than the traditional structure, and the battery pack space utilization increased by 12%.

Conclusion
The penetration rate of welded pipe technology in the field of automotive frames is growing at a rate of 8% per year, and future development directions include:
Intelligent welded pipe system (digital twin model real-time control molding parameters)
Magnesium alloy /CFRP composite pipe welding process
Topological optimization driven continuous forming technology for variable thickness pipes

It is recommended to pay attention to the update of the ISO 15614 standard and the latest certification requirements for automotive welded pipe processes in ASME BPVC Section IX to ensure technical compliance.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill 
89 Pipe welding machine is used to produce steel pipes for highway fences
89 Pipe welding machine is used to produce steel pipes for highway fences
89 Pipe welding machine is a kind of equipment specially used for the production of welded steel pipes. It is very important in the production of steel pipes for highway fences:



89 The working principle of the pipe welding machine 89 The pipe welding machine uncoils the steel strip, feeds and welds it into a round steel pipe, and then cools, straightens and cuts the steel pipe to the required length. The main steps include:

1. Uncoiling: Unroll the steel strip from the drum and level it through the straightener.

2. Forming: The steel strip is rolled into a tube shape through a series of roller wheels.

3. Welding: high frequency current is used to heat the joint of the steel strip, so as to weld the steel pipe.

4. Cooling: The welded steel pipe is cooled by cooling equipment.

5. Straightening and cutting: Finally, straighten and cut the steel pipe to the required length.



The main steel pipe used in the highway fence needs to have a certain strength and impact resistance, but also corrosion resistance. Specific features include:

1. High strength: the steel pipe must be able to withstand the impact to ensure the safety of the highway.

2. Corrosion resistance: steel pipes are usually galvanized to enhance their corrosion resistance and adapt to harsh outdoor environments.

3. Standard size: The steel pipe produced generally has strict size requirements to ensure the stability of the fixed connection of each fence.



The steel pipe produced by the 89 pipe welding machine plays a skeleton role in the highway fence, and its application is reflected in:

1. Guardrail: installed on both sides of the highway or in the middle, to prevent the vehicle from losing control of the road, to protect the safety of the driver.

2. Isolation belt: Set isolation belts between lanes in different directions to prevent vehicles from crossing lanes and reduce the incidence of accidents.

3. Sound barrier: The use of steel pipe frame to support the sound barrier plate to reduce the impact of road noise on the surrounding environment.



In short, the 89 pipe welding machine plays a key role in the production of steel pipes for highway fences, ensuring the stability, durability and safety of the fences, thus providing a reliable guarantee for the safe operation of the highways.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill 
Detail
89 Pipe welding machine is a kind of equipment specially used for the production of welded steel pipes. It is very important in the production of steel pipes for highway fences:



89 The working principle of the pipe welding machine 89 The pipe welding machine uncoils the steel strip, feeds and welds it into a round steel pipe, and then cools, straightens and cuts the steel pipe to the required length. The main steps include:

1. Uncoiling: Unroll the steel strip from the drum and level it through the straightener.

2. Forming: The steel strip is rolled into a tube shape through a series of roller wheels.

3. Welding: high frequency current is used to heat the joint of the steel strip, so as to weld the steel pipe.

4. Cooling: The welded steel pipe is cooled by cooling equipment.

5. Straightening and cutting: Finally, straighten and cut the steel pipe to the required length.



The main steel pipe used in the highway fence needs to have a certain strength and impact resistance, but also corrosion resistance. Specific features include:

1. High strength: the steel pipe must be able to withstand the impact to ensure the safety of the highway.

2. Corrosion resistance: steel pipes are usually galvanized to enhance their corrosion resistance and adapt to harsh outdoor environments.

3. Standard size: The steel pipe produced generally has strict size requirements to ensure the stability of the fixed connection of each fence.



The steel pipe produced by the 89 pipe welding machine plays a skeleton role in the highway fence, and its application is reflected in:

1. Guardrail: installed on both sides of the highway or in the middle, to prevent the vehicle from losing control of the road, to protect the safety of the driver.

2. Isolation belt: Set isolation belts between lanes in different directions to prevent vehicles from crossing lanes and reduce the incidence of accidents.

3. Sound barrier: The use of steel pipe frame to support the sound barrier plate to reduce the impact of road noise on the surrounding environment.



In short, the 89 pipe welding machine plays a key role in the production of steel pipes for highway fences, ensuring the stability, durability and safety of the fences, thus providing a reliable guarantee for the safe operation of the highways.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill 
Purchase used pipe making machine
Purchase used pipe making machine
Time of issue : 2025-01-23
When purchasing used pipe making machines, you can consider the following points:

1.Supply channels:
Online marketplaces: For example, Taobao, Alibaba, Jingdong and other platforms can search and find used equipment.
Professional used equipment market: Some areas have a special used equipment market, you can view the equipment situation on the spot.
Industry exhibitions: Participate in machinery, manufacturing related exhibitions, sometimes you can find suppliers to provide second-hand equipment opportunities.
Peers and recommendations: Ask peers and friends in the industry to obtain reliable equipment and supplier information.

2.Selection criteria:
Equipment condition: Carefully check the service life, maintenance records and running status of the equipment to ensure that the function is intact.
Brand and model: Choose well-known brands and reliable models, usually the quality is guaranteed, and the after-sales service is relatively perfect.
Price comparison: multiple inquiries to ensure reasonable prices to avoid buying inferior equipment at low prices.
Service and Accessories: Find out if the supplier provides after-sales service and accessories to ensure convenient maintenance in subsequent use.

3.Site inspection:
Equipment operation demonstration: The seller is required to perform equipment operation demonstration to observe the actual operation.
Technical Support: Evaluate the seller's technical support capabilities, including whether to provide installation and commissioning services.
Contract protection: Sign a detailed procurement contract to clarify the responsibilities of both parties, equipment specifications, payment methods, after-sales service and other content.

4.Trial Period:
Trial commitment: Try to strive for a certain trial period in order to find potential problems with the equipment during use.
Troubleshooting: During the trial period, pay close attention to the operation of the equipment, if there is a failure, contact the seller as soon as possible.

Through the above methods, you can better purchase a satisfactory second-hand pipe making machine.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill 
Detail
When purchasing used pipe making machines, you can consider the following points:

1.Supply channels:
Online marketplaces: For example, Taobao, Alibaba, Jingdong and other platforms can search and find used equipment.
Professional used equipment market: Some areas have a special used equipment market, you can view the equipment situation on the spot.
Industry exhibitions: Participate in machinery, manufacturing related exhibitions, sometimes you can find suppliers to provide second-hand equipment opportunities.
Peers and recommendations: Ask peers and friends in the industry to obtain reliable equipment and supplier information.

2.Selection criteria:
Equipment condition: Carefully check the service life, maintenance records and running status of the equipment to ensure that the function is intact.
Brand and model: Choose well-known brands and reliable models, usually the quality is guaranteed, and the after-sales service is relatively perfect.
Price comparison: multiple inquiries to ensure reasonable prices to avoid buying inferior equipment at low prices.
Service and Accessories: Find out if the supplier provides after-sales service and accessories to ensure convenient maintenance in subsequent use.

3.Site inspection:
Equipment operation demonstration: The seller is required to perform equipment operation demonstration to observe the actual operation.
Technical Support: Evaluate the seller's technical support capabilities, including whether to provide installation and commissioning services.
Contract protection: Sign a detailed procurement contract to clarify the responsibilities of both parties, equipment specifications, payment methods, after-sales service and other content.

4.Trial Period:
Trial commitment: Try to strive for a certain trial period in order to find potential problems with the equipment during use.
Troubleshooting: During the trial period, pay close attention to the operation of the equipment, if there is a failure, contact the seller as soon as possible.

Through the above methods, you can better purchase a satisfactory second-hand pipe making machine.

For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier:www.usedpipemill.com

JinYuJie-Used Pipe Mills Supplier(Please click the link→) :second-hand pipe mill 
Contact information
Tel: +86-13392281699
Wechat: 13392281699
Email: zty@usedpipemill.com
Company address:No. A99, East Lecong Avenue, Lecong Town, Foshan City, Guangdong Province

Recommendation

Online Inquiry

留言应用名称:
底部留言
描述:

LINK

Contact Us

Tel (wechat): 13336487288
Wechat:+86 13336487288

WhatsApp:+86 13336487288
Email: zty@usedpipemill.com

Address: No. A99, Lecong Avenue East, Lecong Town, Foshan City, Guangdong Province

QRCODE

Copyright 0 2021 jinyujie. 粤ICP备13051810号 Powerby:  300.cn