This standard specifies the test method for JS series bundle twisting equipment. This standard applies to JS series bundle twisting equipment. This standard is used together with JB/T 6756.1. JB/T 6756.3-1993 Test method for special equipment for wires and cables Part 3: JS series bundle twisting equipment JB/T6756.3-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Special Equipment for Wires and Cables
Test Methods
Part 3 JS Series Bundle Twisting Equipment
Subject Content and Scope of Application
This standard specifies the test methods for JS series bundle twisting equipment. This standard applies to JS series bundle twisting equipment. JB/T 6756.393
This standard is used together with JB/T6756.1 "Test Methods for Special Equipment for Wires and Cables Part 1 General Principles". 2 Reference standards
GB10095
JB/T5818.2
JB/T5817.2
JB/T5814.3
JB/DQ8657
JB/DQ8124
3 Idle running performance test
Precision of involute cylindrical gears
Technical requirements for wire and cable twisting equipment Part 2 Bundle twisting equipment Wire and cable twisting equipment
Equipment specifically for wires and cables
Type and size
Part 2 Bundle twisting equipment
Basic parameters Part 3
Special equipment for wires and cables Product quality classification Basic technical requirements for cable equipment
3.1 Preparation before testing
Perform in accordance with the 3 provisions of JB/T6756.1.
3.2 Rotation steps and time of the operating mechanism
Stranding equipment
The operating mechanism of the equipment should start from the lowest speed and increase step by step. Generally, it should operate at three speeds: low, medium and high. The operating time of each speed should not be less than 30 minutes, and the continuous idling time at the highest speed should not be less than 4 hours. 3.3 Speed ​​detection
The equipment is started to normal working state, and the tachometer probe is placed on the center hole of the main shaft of the rotating body. When the tachometer indicates stability, its reading is the equipment speed.
3.4 ​​Temperature rise detection
At the rated speed, use a point thermometer to measure the temperature of the main shaft of the rotating body, the bearing cover of the transmission gear box and the suspicious point and calculate the temperature rise. The temperature rise should comply with the provisions of JB/DQ8124.
3.5 Noise detection
Noise detection should comply with the provisions of Article 5.1 of JB/T6756.1 and be carried out at the highest speed. 3.6 Braking time test
When the equipment is at the highest speed, press the stopwatch and stop button at the same time. When the main shaft of the rotating body stops driving, immediately press the stopwatch. The reading of the stopwatch pointer is the braking time.
3.7 The inspection of electromechanical safety protection devices shall comply with the provisions of Article 5.3 of JB/T6756.1. 4 Load operation performance test
After the equipment passes the idle operation, it shall be adjusted and the load operation performance test shall be carried out under normal process conditions. Approved by the Ministry of Machinery Industry on August 21, 1993
Implemented on October 1, 1993
JB/T6756.3-93
4.1 Product specification test
From the production range specified by the equipment, select large, medium and small specifications as the processing objects, and run them at the maximum speed allowed by the processing objects. Each specification shall not be less than 1. Full plate, use conventional measuring tools to measure the pitch and twist outer diameter, 4.2 Reliability test
Within the specified operating speed range of the equipment, under normal production conditions, run continuously for 24 hours without failure. 4.3 Conductor pitch error rate test
Use conventional measuring tools to measure 10 pitches at any point and find the average value. The calculation formula of the pitch error rate is as follows. LL×100%
Where: L,——nominal pitch, mm;
Ls——average value of 10 pitches measured at any point, mm. 5 Accuracy test of main parts and components
5.1 Reel rack
5.1.1 The coaxiality test of the reel support shaft hole shall comply with the provisions of Figure 1 and Table 1. 5.1.2 The coaxiality test of the reel rack support shaft hole shall comply with the provisions of Figure 2 and Table 2. 5.1.3 The verticality of the reel support shaft hole and the reel rack support shaft hole (Z type) shall be tested according to the inspection regulations of the manufacturer. 5.1.4 The parallelism test of the reel support shaft hole to the reel rack support shaft hole (H type) shall comply with the provisions of Figure 3 and Table 3. 5.2 The radial runout test of the bottom of the traction wheel shall comply with the provisions of Figure 4 and Table 4. 5.3 Dynamic balance accuracy test of rotating body
Select a suitable dynamic balancing test machine according to the speed, weight and turning radius of the rotating body, and perform the test according to the operating regulations of the dynamic balancing test machine. 6. Overall machine accuracy inspection
Assembly accuracy of the wire drum rack
Use visual inspection to inspect the inclination of the wire drum rack after assembly (Type B). 6.2 Coaxiality of the two supporting shafts of the rotating body
The inspection method for coaxiality of the two supporting shafts of the rotating body during assembly shall comply with the provisions of Figure 5 and Table 5. a.
b. The indirect inspection method for coaxiality of the two supporting shafts of the rotating body after assembly shall comply with the provisions of Figure 6 and Table 6. 7 Appearance quality inspection
The appearance quality inspection of the equipment shall comply with the provisions of Article 5.2 of JB/T6756.1. Reference spindle
Testing items
Boiler bearing shaft
Hole coaxiality
Testing items
Boiler rack support
Shaft hole coaxiality
JB/T5818.2
JB/T5818.2
Testing tools
1. Measuring stand with indicator
4. Enclosed and adjustable support
JB/T 6756.3-93
Testing method
1. Make the length of mandrel 1, 1 greater than 2 times the length of the hole. 2. Make mandrel 1, 1 and the hole of the wire drum support fit without clearance. Place the wire drum rack on the two supports and calibrate the reference mandrel I to be parallel to the plate. After heating, measure at points a and b on the I axis and calculate the difference fu and fu between the two points and the height (L+sign
) respectively!
3. Turn the wire drum rack 90 degrees and measure f, and fo according to the same method. 4. According to f.=2 f)+(f,)
f=2fm）+（f）
Calculate the coaxiality error of points a and b, and take the larger value as the coaxiality error of the wire drum support hole,
Reference mandrel
Detection tool
1. Measuring stand with indicator
4. Fixed and
adjustable support
Detection method
1. Make mandrels 1, 1, and the length is greater than 2 times the hole length. 2. Make the mandrel and the wire drum support shaft hole into a gapless fit, and adjust the wire drum frame to make the reference mandrel axis parallel to the plate, and then measure the scene at points a and b near the end face of the measured hole on the I axis, and calculate the difference between the two points and the height (+ sign) respectively. 3. Rotate the wire drum frame 90\ with the center line of the wire drum frame support shaft hole as the axis, according to Measure g, fo in the same way
4. According to the formula f=2）+(f,)
the coaxiality error of point b:
Calculate the coaxiality error of points a and b, and take the larger value as the coaxiality error of the reel rack supporting shaft hole,
Test items
Parallelism of reel supporting shaft
hole to reel rack
supporting shaft hole (H) type
JB/T5818.2
Testing tools
1.Measuring stand with indicator
4.V-shaped bracket
JB/T6756.3-93
Testing method
1. Make the core shaft of the reel supporting shaft hole and the reel rack supporting shaft hole, and the length shall be greater than the width of the hole. Insert the mandrel seamlessly into the corresponding axial hole. 2. Place the mandrel of the support shaft hole of the wire drum rack on the two V-shaped brackets, and calibrate the mandrel to make it parallel to the plate.
3. Measure the difference between the mandrel a and b of the wire drum support shaft hole and the height (L+signal), and fbZxz.net
4. Rotate the wire drum rack 90° and measure fm and fm in the same way. 5. Calculate the parallelism error of points a and b according to
.)+(f)
f)+(fg)
and take the larger value as the parallelism error of the wire drum support shaft hole to the wire drum rack support shaft hole.
Testing items
Traction wheel bottom transverse
Radial ring runout
Testing items
Coaxiality of the bearing holes of the two branches of the rotating body
JB/T5818.2
JB/T5818.2
Testing tools
1. Measuring stand with indicator
3. V-shaped bracket
Testing tools
JB/T6756.3-93
Testing methods
1. Make the mandrel and the traction wheel shaft hole fit seamlessly, and place the two ends of the mandrel on the blade-shaped V-shaped bracket to calibrate the level.
2.Place the indicator contact on the bottom of the traction wheel groove, rotate the spindle for one circle, and the maximum difference in the indicator reading is the radial circular rotation of the traction wheel bottom. Spindle
Testing method
1. The spindle diameter is made according to the effective size of the bearing hole of the swivel, and the length is greater than the width of the two bearing holes. 2. Make the spindle pass through the two bearing holes smoothly and be able to rotate.
Testing items
Coaxiality of the two bearings of the swivel
Testing tools
1. Measuring frame with indicator
2. Special bracket
JB/T6756.3-93
Testing method
1. Fix the measuring frame on the rotating part connected to the right rotating spindle. 2. Use a special bracket to make the indicator measuring point touch the outer ring surface of the left rotating spindle or the rotating part on the shaft.
3. Remove the spindle transmission parts of the tested equipment, and indirectly rotate the right rotating spindle for one circle. The maximum reading difference of the indicator is the coaxiality error between the two rotating body support shafts. Note: When processing the test results, the coaxiality error of the rotating plate and the rotating body should be considered. Additional explanation:
This standard was proposed and managed by the Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard was drafted by Zhengzhou Cable Factory. The main drafters of this standard were Li Jianguo and Ying Qihan. 16
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