This standard specifies the test methods for JLC series fork twisting equipment. This standard applies to JLC series fork twisting equipment. This standard is used together with JB/T 6756.1. JB/T 6756.5-1993 Test methods for special equipment for wires and cables Part 5: JLC type fork twisting equipment JB/T6756.5-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Testing methods
Equipment for special wires and cables
Part 5 JLC type fork twisting equipment
Subject content and scope of application
This standard specifies the test methods for JLC type fork twisting equipment. This standard is applicable to JLC type fork twisting equipment.
JB/T 6756.593
This standard is used together with JB/T6756.1 "Testing methods for special wire and cable equipment Part 1 General Principles".
2 Reference standards
GB10095
Precision of involute cylindrical gears
JB/T5818.4 Technical requirements for wire and cable twisting equipment Cage twisting equipment JB/DQ8657 Product quality classification of wire and cable special equipment JB/DQ8124 Basic technical requirements for electric performance equipment 3 Idle running performance test
3.1 Preparation before test
Before the test, the 3 provisions in JB/T6756.1 should be followed. 3.2 Rotation steps and time of the operating mechanism
The operating mechanism of the equipment should start from the lowest speed and gradually increase. Generally, it should operate at three speeds: low, medium and high. The operating time of each speed is not less than 30 minutes, and the continuous idle running time at the highest speed is not less than 4 hours. 3.3 Speed ​​detection
Use a tachometer to measure the speed of each output shaft, and its speed should meet the design requirements. 3.4 Temperature rise detection
Use a point thermometer to measure the temperature of the transmission gearbox, speed change gearbox, bearing cover of the support seat and suspicious points at both ends of the main shaft at the rated speed 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 detection
At the highest speed of the cage, press the stopwatch and stop button at the same time. When the cage stops rotating, immediately press the stopwatch, and the reading is the braking time.
3.7 Electromechanical safety protection device detection
Electromechanical safety protection device detection should comply with the provisions of Article 5.3 of JB/T6756.1. 4 Load operation performance detection
After the equipment passes the idling test, it is adjusted and carried out under normal process conditions. Load operation performance detection. 4.1 Product specification test
From the production specifications specified by the equipment, select large, medium and small specifications as the twisting objects, and run at the highest speed allowed by the processing object. Each specification shall not be less than 1 full reel, and the pitch and twist outer diameter shall be measured with conventional measuring tools. 4.2 Reliability test
Within the operating speed range specified by the equipment and under normal production conditions, it can run continuously for 24 hours without failure. 5 Accuracy test of main components
5.1 Fork frame
The coaxiality test of the axis of the reel support shaft shall comply with the provisions of Figure 1 Table 1. a.
The static balance accuracy test of the fork frame shall comply with the provisions of Figure 2 Table 2. b.
5.2 Gearbox
The detection of the axis parallelism of each bearing hole of the gearbox body shall comply with the provisions of Figure 3 Table 3. The detection of gear accuracy shall comply with the relevant provisions of GB10095. Machine accuracy detection
After the whole machine is assembled, the detection of the spindle deflection shall comply with the provisions of Figure 4 Table 4. 7
Appearance quality detection
The appearance quality detection of the equipment shall comply with the provisions of Article 5.2 of JB/T6756.1. Figure
Testing items
Wire drum support shaft
Axis coaxiality
JB/T5818.4
Testing tools
Testing methods
1. The diameter of the mandrel is made according to the effective size of the hole, and the length is greater than the width of the wire drum support. 2. Use the inspection mandrel to pass through the two holes to be tested. The inspection mandrel should be able to pass through and rotate. 23
Testing items
Static balance of fork frame
Counterpoint
JB/T5818.4
Testing tools
1. Equal height V-shaped
support frame;
2.Hollow balance
3.Horizontal steel shaft
4.Plasticine
Testing items
Axis of each axis of gear box
Parallelism of bearing hole
JB/DQ8657
Testing tools
1.Measuring frame with indicator
2. Fixed and adjustable support three
JB/T6756.5-93
Hollow balance spindle
Horizontal steel shaft
Equal height V-shaped support frame
Testing methodWww.bzxZ.net
1. Put the fork frame in the middle position of the balance spindle, and place the balance spindle on the horizontal steel shaft, so that the fork frame is symmetrically placed in the middle of the horizontal steel shaft, rotate the fork frame, when the fork frame stops automatically, use plasticine to counterweight the top of the fork frame, test in sequence so that the fork frame can stop at any position, the product of the mass of the rubber mix and the distance from the plasticine to the center line of the balance spindle is the static unbalance moment of the fork frame.
Testing method
1. Place the gear box on three equal height supports on the workbench of the clock bed 2. Fix the measuring frame on the main shaft of the bed, rotate the main shaft to calibrate any bearing hole on the gear box and make the center of the front and rear holes coincide.
3. Move the workbench to align the second bearing hole with the bed spindle, and measure in three axial sections at 120° to each other. The maximum value of half the difference in the indicator reading is taken as the parallelism error of the bearing hole.
(m,m,)max;
4. Detect the parallelism errors of the remaining bearing holes in turn; 5. Random detection is also possible.
Testing items
Spindle deflection (axis
diameter ≥320mm)
Additional instructions:
JB/T5818.4
Testing tools
Theodolite
JB/T 6756.593
Testing methods
Detect the spindle deflection according to the theodolite operating regulations. This standard is proposed and managed by the Shanghai Cable Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Dongfang Electric Machinery Factory. The main drafters of this standard are Yang Zhenguo and Yang Binhua.
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