JB/T 5761.1-1999 Technical requirements for CNC pipe bending machines
Some standard content:
ICS 25.120.10
J62
JB
Machinery Industry Standard of the People's Republic of China
JB/T5761.1-1999
CNC pipe bending machine|| tt||Released on 1999-05-14
Technical Conditions
Implemented on 2000-01-01
National Machinery Industry Bureau
Released
JB/T5761 .1-1999
Foreword
This standard is a revision of ZBJ62034-90 "Technical Conditions for CNC Pipe Bending Machines". The technical content of this standard is basically the same as that of ZBJ62034--90, and has only been re-edited in accordance with relevant regulations. This standard will be implemented from January 1, 2000. This standard replaces ZBJ62034-90 from the date of implementation. This standard is proposed and administered by the National Forging Machinery Standardization Technical Committee. The organization responsible for drafting this standard: Changzhi Forging Machine Tool Factory. This standard was first released in April 1990.
1 Scope
Mechanical Industry Standard of the People's Republic of China
CNC Pipe Bending Machine Owner
Technical Conditions
This standard specifies the design, Manufacturing and acceptance requirements, JB/T 5761.1-1999
replaces ZB J62 034-90
This standard is applicable to winding CNC pipe bending machines for bending metal pipes under cold conditions (Hereinafter referred to as pipe bending machine) 2 Reference standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB 191—1990
GB/T 3766—1983
GB/T5226.1—1996
GB/T 7932—1987
GB/T 79351987||tt ||GB/T I3306—1991
GB 17120—1997
JB/T1829—1997
JB/T 3240—1999
JB/T 8356.1—1996| |tt||JB/T 99541999
JB 99711999
3 Technical requirements and test methods
3.1 Drawings and technical documents
Packaging, storage and transportation pictorial marks||tt ||General technical conditions for hydraulic systems
Industrial machinery and electrical equipment Part 1: General technical conditions General technical conditions for pneumatic systems
General technical conditions for hydraulic components
Signs
Forging Mechanical safety technical conditions Www.bzxZ.net
General technical conditions for forging machinery
Visual symbols for forging machinery operating instructions
Machine tool packaging technical conditions
Cleanliness of hydraulic system of forging machinery||tt| |The drawings and technical documents of pipe bending machines, small and medium-sized three-roller plate bending machines, noise limit pipe bending machines shall comply with the requirements of this standard, and shall be approved in accordance with the prescribed procedures before they can be put into production. 3.2 Parameters and Accuracy
The parameters and accuracy of the pipe bending machine should comply with the relevant standards. 3.3 Structural Performance
3.3.1 Pipe bending machines generally have three-axis motion including arm rotation, chuck linear movement and chuck rotation, and are controlled by a CNC system. 3.3.2 The three axes of the pipe bending machine should generally have three speeds: low, medium and high. 3.3.3 The pipe bending machine should have displacement display of each axis coordinate. 3.3.4 The pipe bending machine should ensure the convenience of loading, unloading and mold adjustment. 3.3.5 The structure of the pipe bending machine should ensure that the smaller straight section between the two elbows and the length of the end of the pipe fitting when bending the pipe. 3.4 Accessories and compatibility
National Machinery Industry Bureau approved on 2000-01-01 for implementation on 1999-05-14
JB/T5761.I1999
3.4.1 Pipe bending machine when leaving the factory Necessary accessories and spare wearing parts should be prepared. Special accessories shall be agreed upon between the user and the manufacturer and may be supplied randomly or ordered separately.
3.4.2 Accessories and ancillary devices of elbow fittings shall comply with relevant regulations. Outsourced accessories should obtain certification and be installed on the pipe bending machine for operational testing.
3.4.3 The pipe bending machine should generally be randomly equipped with a set of bending molds corresponding to the minimum bending radius for the maximum bending specification. The other specifications of bending molds shall be jointly agreed upon by the user and the manufacturer and ordered separately. 3.5 Safety and Protection
3.5.1 The pipe bending machine should have reliable safety protection devices and should comply with the relevant regulations of GB17120. 3.5.2 The rotating arm and chuck carriage should have safety protection devices when they move to the two extreme positions. 3.5.3 The rotating arm should have reliable personal safety protection devices within the rotating working area. 3.5.4 The movements of each mechanism of the pipe bending machine should have reliable interlocking devices. Under the condition that the input basic parameters are correct, if there is an operation or programming error, there should be no action or damage to the involved parts. 3.5.5 The hydraulic system of the pipe bending machine should have a reliable overload protection device. At full load, the pipe bending machine should be able to operate normally. When overloaded, other parts should be protected from damage. 3.5.6 The parts that are easy to loosen during the operation of the pipe bending machine should have reliable anti-loosening measures. 3.5.7 The locking mechanisms of all pipe clamping devices on the pipe bending machine should be reliable, and the pipes should not loosen or come out during the pipe bending process. 3.6 Rigidity
The body, guide device, pipe clamping device and mandrel system of the pipe bending machine should have sufficient rigidity and should comply with the relevant standards. 3.7 Lubrication
The pipe bending machine should have a reliable lubrication device to ensure normal lubrication of each operating part, and should have dust-proof measures. 3.8 Anti-leakage
The oil and gas in hydraulic, lubrication and pneumatic systems should not leak or leak. 3.9 Signs
The pipe bending machine should have a nameplate and various signs or signs such as lubrication, operation, and safety. The type, size, material, and technical requirements of the sign shall comply with the provisions of GB/T13306. The visual symbols on the sign should comply with the provisions of JB/T3240. Signs should be placed neatly and securely in a prominent position and remain clear.
3.10 Working environment conditions
The pipe bending machine should be operated at an ambient temperature between 0-40℃, without strong magnetic field, electric field interference and AC grid voltage fluctuation within the rated voltage +10%~-15% and It works normally under the condition of frequency 50Hz±1Hz. 3.11 Castings, forgings and weldings
3.11.1 All castings, forgings and weldings on the pipe bending machine shall comply with the standards. Defects that do not affect the use and appearance are allowed to be repaired in accordance with the prescribed technical documents under the condition of ensuring quality. 3.11.2 The working surfaces of important cast parts, such as gear tooth surfaces and sliding surfaces such as sliding bearings, slide blocks and guide rails, should not have defects such as pores, shrinkage holes, blisters, slag holes and segregation. 3.11.3 The internal stress of important castings or welding parts such as the fuselage, kidneys, roller frames, etc. should be eliminated. 3.12 Parts processing
3.12.1 Parts processing should comply with the requirements of design, technology and relevant standards. The machined surface should be free of burrs, marks and other mechanical damage. Unless otherwise specified, sharp edges should be blunted. 3.12.2 Scratched sliding surfaces and important planes JB/T 5761.1—1999
a) The contact conditions of scraped bearing bushes and bushings should be inspected in the actual working position (for example, the bearing bush should be pressed against the bush seat Inside). b) The scraping points on the working surfaces of the bearing bush and guide rail should be even. When using inspection rods or matching parts for color inspection, the average calculation is within an area of ??300cm2 (if the area is less than 300cm2, the average calculation is based on the actual area). The number of contact points within each 25mm × 25mm area should not be less than the requirements in Table 1. The scraping point of the bearing bush should be inspected within the working surface (not less than 120°) (when the oil groove is included, the range of twice the width of the oil groove on the side of the oil groove will not be assessed).
Table 1
Guide rail width, bearing and bearing diameter
mm
≤120
>120
Note
1. Two guide rails with different widths should be inspected according to the specified number of points for wide guide rails. 2 The above regulations do not apply to bushings other than bearings. Number of contact points
≥8
>6
c) Important working planes processed by scraping method, such as various dovetail grooves, sliders, etc., use coloring method and inspection plate When jointly testing the flatness, the contact should be uniform, and the average contact points should not be less than six points per 25mm×25mm area. 3.12.3. Mechanically processed sliding surfaces
Sliding guide rails, bearing bushes, bushings, etc. that are processed by precision planing, grinding or other mechanical processing methods, the contact condition should be checked using the coloring method, and the contact should be uniform. The cumulative value of the contact area should not be less than 70% of the axial length of the bushing, bearing bush and the full length of the guide rail, and should not be less than 50% of the width of the guide rail.
3.12.4 Wear-resistant measures
Wear-resistant measures should be taken for important moving friction pairs such as the main shaft, guide rail, clamping slider, guide slider, cylinder and piston rod of the bent pipe. 3.13 CNC, hydraulic, pneumatic systems and electrical equipment 3.13.1 CNC system
a) The CNC system should comply with the provisions of 3.7 in JB/T1829-1997; b) The elbow storage capacity of the CNC system should generally be 200 pieces Above the elbow; c) The CNC system should have a power-off memory function; d) The CNC system should have a fault self-diagnosis function: e) The display of each displacement coordinate of the CNC system should be consistent with the actual displacement and comply with relevant regulations. The display method should be intuitive and easy for the operator to observe;
f) The display accuracy of each displacement of the CNC system shall not be less than 0.1° or 0.1mm; g) The CNC system shall ensure a minimum setting of 0.1° or 0.1mm. Quantitative: h) For pipe bending machines with self-programming functions, the pipe type input and programming methods should be simple and easy to implement: 1) The CNC system should generally have a coordinate conversion function. 3.13.2 Hydraulic system
JB/T5761.1-1999
The hydraulic system of the pipe bending machine shall comply with the regulations of GB/T3766. Hydraulic components used in hydraulic systems should comply with the regulations of GB/T7935. The cleanliness of the hydraulic system should comply with the requirements of JB/T9954. 3.13.3 Pneumatic system
The pneumatic system of the pipe bending machine shall comply with the regulations of GB/T7932. 3.13.4 Electrical equipment
The electrical equipment of the pipe bending machine shall comply with the regulations of GB/T5226.1. 3.14 Assembly
3.14.1 The pipe bending machine shall be assembled according to the assembly process regulations. The parts and components assembled on the pipe bending machine should meet the quality requirements. It is not allowed to install gaskets, sleeves and other parts not specified in the drawing. 3.14.2 The cleanliness of the pipe bending machine should comply with the relevant standards. 3.14.3 The important fixed joint surfaces on the pipe bending machine, such as the pipe bending mold and the spindle or the end face of the rotating arm, the guide rail frame and the fixed surface of the bed, etc., should be closely aligned. After tightening, use a 0.05mm cold ruler to inspect. The depth allowed to be inserted into the case ruler should not be greater than 1/4 of the width of the contact surface, and the cumulative length of the parts where feeler gauges can be inserted between the contact surfaces should not be greater than 1/10 of the circumference. The axial misalignment of the meshing gear on the pipe bending machine after installation should not be greater than the requirements in Table 2. 3.14.4
Table 2
Pinion rim width
≤50
>50-150
>150
3.15 Noise
Center misalignment
2.5
4
6
mm
The sound of the pipe bending machine during idle operation should be normal. The sound should comply with the provisions of JB9971, and the measurement method should comply with the provisions of 4.9 in JB/T1829-1997. Raised, dented or rough. The joints such as cover plate and casing should be smooth. Exposed pipes and lines should be arranged neatly and firmly. There should be no obvious misalignment of the exposed bonding surfaces. 3.16.2 The painting of the unprocessed surfaces of all parts and accessories on the pipe bending machine shall comply with the provisions of 3.9.8 in JB/T1829--1997. 3.16.3 The main exposed machining surface should be free from scale, scratches and rust. 4 Inspection Rules
4.1 Inspection Rules
a) Each pipe bending machine must pass the factory inspection by the manufacturer's inspection department before it can leave the factory; b) For new products and updated products (including Products with major changes in structure, main parts materials, and processes) should be type-inspected in accordance with relevant regulations:
c) Before the pipe bending machine test, the vertical and horizontal installation levels of the pipe bending machine should be adjusted in accordance with relevant regulations. During the test process, mechanisms and parts that affect the performance and accuracy of the pipe machine should not be adjusted;
d) The pipe bending machine test can be replaced by measuring instruments with equal or higher accuracy than the specified measuring instruments: 4||tt| |JB/T 5761.1—1999
e) When there are abnormal phenomena during the test, the cause can be found out and adjustments made. After adjustment, in principle, the test must be restarted. The results of the tests that have been done are not affected by this. Items affected by this adjustment may not be retested. 4.2 Factory inspection items
The pipe bending machine shall undergo factory inspection and testing according to the following items: a) Basic parameter inspection:
b) Basic performance inspection;
c) Assembly quality inspection;
d) Dry running test;
e) Noise inspection:
0 load test:
g) Accuracy inspection;
h) Appearance quality inspection ;
i) Packaging quality inspection.
In addition to the above inspection items, type inspection should also conduct inspections as required in 3.6. 4.3 Basic Parameter Inspection
The basic parameters of pipe bending machines are allowed to be randomly inspected by batch. The number of random inspections in each batch should not be less than 10%, but should not be less than one. 4.4 Basic performance inspection
The no-load test or load test of the pipe bending machine should be carried out according to the following items: a) Test the reliability of various safety devices such as limiters, interlocks, overload protection devices and emergency stop buttons: b) Inspect the flexibility and reliability of various operating specification tests such as chuck clamping, chuck carriage feeding, clamping block clamping and loosening, arm rotation, chuck rotation, mandrel advance and retreat, etc.; c) Inspection The reliability of various adjustable or adjusting devices; d) Check the accuracy and reliability of all indicators, counters and various display devices: e) Check the flexibility and reliability of accessory devices; Check the reliability of lubrication devices ;
g) Check the reliability of the pneumatic device;
h) Check the reliability of the hydraulic device:
i) Check the reliability of the electrical device;
j) Check the function and reliability of the CNC system. 4.5 Assembly quality inspection
Inspect the assembly quality of the pipe bending machine according to 3.13 and 3.14. 4.6 Dry running test
4.6.1 Dry running test time
The dry running time should not be less than 8h, of which the running time at the highest speed should not be less than 1h. 4.6.2 Continuous dry running test specifications
During the dry running test, the maximum action specifications of each actuator are completed in five times during each cycle. The stop time between each cycle is generally 1/2 of the cycle time of T., but the longest shall not exceed 1 minute. JB/T 5761.1-1999
The full stroke at all levels of speed should be done during the dry running test The number of tests and inching tests shall not be less than seven. 4.6.3 Temperature rise and temperature limit
During the idle operation of the bypass machine, use a point thermometer to measure the measurable part where the heat is highest on the part. The temperature rise and maximum temperature shall not exceed the following regulations:
a) The temperature rise of the dynamic bearing shall not be greater than 35°C, and the maximum temperature shall not be greater than 70°C; b) The temperature rise of the rolling bearing shall not be greater than 40°C, The maximum temperature should not be higher than 70°C; c) The temperature rise of the sliding guide rail should not be greater than 15°C, and the maximum temperature should not be higher than 50°C; d) The oil inlet temperature of the hydraulic pump should not be higher than 60°C. 4.7 Noise inspection
According to the requirements of 3.15, when continuous operation without load, inspect the noise sound pressure level (A-weighted sound pressure level) of the pipe bending machine at the specified position. 4.8 Load test
4.8.1 Each pipe bending machine should generally undergo a rated load test. 4.8.2 Rated load test method, that is, bend the pipe 180° under the conditions of the maximum bend specification and the corresponding minimum bending radius at the maximum bend specification. It is also allowed to conduct the rated load test according to the equivalent method of reducing the size of the elbow and reducing the bending radius at the same time. 4.8.3 During the rated load test, the pipe bending machine should work smoothly, reliably, and comply with relevant regulations. 4.9 Accuracy inspection
The accuracy of the pipe bending machine should be inspected after the rated load test. The inspection data should be recorded in the factory certificate of conformity. The inspection items and methods should comply with the provisions of relevant standards.
4.10 Appearance quality inspection
The appearance quality inspection of the pipe bending machine shall comply with the provisions of 3.16. 4.11 Packaging quality inspection
The packaging quality inspection of the pipe bending machine shall comply with the provisions of Chapter 5. 5 Marking, packaging and random technical documents
5.1 Anti-rust
The anti-rust of the exposed processing surfaces of parts, components, accessories and spare parts of the pipe bending machine should comply with the provisions of relevant standards. 5.2 Packaging and marking
The packaging and marking of pipe bending machines and their components should comply with the regulations of JB/T8356.1 and GB191. 5.3 Random technical documents
a) Instructions for use (including CNC system instructions); b) Certificate of conformity;
c) Packing list.
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