A method and device for adjusting the torque of dual-shafts of electronic products

Abstract

The present invention relates to a method for adjusting the torque of a dual-rotating shaft of an electronic product, comprising the following steps: positioning a rotating shaft to be tested on a torque testing machine; rotating the rotating shaft in alternate forward and reverse directions to obtain the average torque values ​​of the rotating shaft in forward and reverse directions respectively; comparing the difference between the average torque values ​​of the rotating shaft in forward and reverse directions, and if the difference is greater than a first set difference, adjusting the large shaft nut; rotating the small shaft and the large shaft in alternate forward and reverse directions to obtain the average torque value, and if the average torque value is outside the normal torque range, adjusting the small shaft nut and repeating the steps. The present invention also provides a dual-rotating shaft torque adjustment device for electronic products. The present invention can not only automatically adjust the single-axis torque, but also the dual-axis torque, and the rotating shaft with excessive positive and reverse torque deviations can also be automatically adjusted, thereby greatly improving the production yield and production efficiency.

Description

Technical Field

[0001] The invention belongs to the field of testing, and in particular relates to a torque test. Technical Background

[0002] After the hinges, loose-leaf hinges and other products with a rotating shaft structure are manufactured, a torque pre-rotation test is required to ensure smoother movement between the components of the rotating shaft. At the same time, the torque needs to be tested accordingly, and the torque of the rotating shaft that does not meet the standards needs to be adjusted or eliminated. The patent number is 201010151894.6, which discloses a torque adjustment machine and a method for adjusting hinge torque using the same. It is specifically aimed at general single-axis torque adjustment and testing. The existing automatic torque adjustment machine can only screen out materials with excessive deviation of positive and negative torque of single-axis Hinge, and cannot automatically adjust. Since the structures of single-axis and double-axis hinges are different, the forces are completely different. Therefore, in the existing hinge adjustment scheme, the adjustment of single-axis and double-axis cannot adopt the same adjustment method. There are always differences in the processing technology of Hinge double-axis products compared with Hinge single-axis during the processing process. The material often has excessive deviation of positive and negative torque values. The vast majority of materials can reduce the positive and negative errors of Hinge by manually adjusting the tightness of the nuts of the two axes. For double-axis adjustment, a method needs to be developed to solve the problem that the production yield and production efficiency have been in a relatively low state. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for realizing torque adjustment of a dual-axis hinge. The present invention also provides a device for realizing the above method.

[0004] The invention provides a method for adjusting the torque of a dual-shaft electronic product, comprising the following steps:

[0005] A. Position the rotating shaft to be tested on the torque testing machine, wherein the rotating shaft is a double rotating shaft having a large rotating shaft and a small rotating shaft;

[0006] B. rotating the shaft in forward and reverse directions alternately to obtain the average torque values ​​of the shaft in forward and reverse rotations respectively;

[0007] C. Compare the difference between the average torque values ​​of the shaft in forward and reverse rotation for a limited number of times. If the difference is greater than the first set difference, adjust the large shaft nut and return to step B; if the difference is less than the first set difference, proceed to step D;

[0008] D. Alternately rotate the small shaft in the forward and reverse directions and obtain the average torque value of the small shaft. If the average torque value of the small shaft is within the normal torque range of the small shaft, proceed to step E. If the average torque value of the small shaft is outside the normal torque range of the small shaft, adjust the small shaft nut and repeat step D.

[0009] E. Alternately rotate the main shaft in forward and reverse directions and obtain the average torque value of the main shaft. If the average torque value of the main shaft is outside the normal range of the main shaft torque, adjust the main shaft nut and repeat step E. If the average torque value of the main shaft is within the normal range of the main shaft torque, end.

[0010] As a further description of the above-mentioned method for adjusting the torque of dual shafts of an electronic product, step C sets the number of times to repeat the comparison of the difference. If the number of executions is greater than the number of repetitions, the shaft to be tested is marked as defective.

[0011] As a further description of the above-mentioned dual-axis torque adjustment method for an electronic product, in step D, the maximum value and the minimum value of the small-axis torque are set, and the normal range of the small-axis torque is between the maximum value and the minimum value of the small-axis torque.

[0012] As a further description of the dual-axis torque adjustment method for the above-mentioned electronic product, in step E, the maximum value and the minimum value of the main shaft torque are set, and the normal range of the main shaft torque is between the maximum value and the minimum value of the main shaft torque.

[0013] As a further description of the dual-shaft torque adjustment method for the electronic product, the following steps are also included before step B: adjusting the main shaft nut to set the initial shaft torque.

[0014] A dual-shaft torque adjustment device for electronic products comprises a torque testing machine, a swing mechanism and a torque adjustment mechanism, wherein the torque adjustment mechanism is provided with a large shaft adjustment end and a small shaft adjustment end, the large shaft adjustment end and the small shaft adjustment end respectively correspond to the large shaft nut and the small shaft nut of the adjustment shaft; the torque testing machine fixes the small shaft of the shaft by a locating pin and obtains the torque value of the shaft, the swing mechanism clamps the large shaft of the shaft, and the swing mechanism drives the shaft to rotate around the small shaft and the large shaft.

[0015] As a further description of the dual-axis torque adjustment device for the above-mentioned electronic product, the torque adjustment mechanism is fixed on the servo lifting cylinder and the shaft servo motor, and the servo lifting cylinder drives the large shaft adjustment end and the small shaft adjustment end to move up and down, and the shaft servo motor drives the large shaft adjustment end and the small shaft adjustment end to rotate.

[0016] As a further description of the dual-axis torque adjustment device for electronic products, the swing mechanism is provided with a rotating platform and a torque measuring clamping end, the torque measuring clamping end clamps the large rotating axis, and the rotating platform rotates horizontally around the rotating axis.

[0017] The beneficial effects of the present invention are: the torque of the dual-axis hinge can be adjusted, and the shaft with excessive positive and negative torque deviation can also be automatically adjusted, thereby greatly improving the production yield and production efficiency. Its dual-axis torque adjustment method can effectively avoid the problem of only measuring the data of single-axis rotation during the rotation process, so that the yield of the product can be measured more accurately, and the torque of the defective dual-axis can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the torque testing machine of the present invention;

[0019] Figure 2 This is the structural diagram of the dual-shaft product used for testing;

[0020] Figure 3 It is a diagram of the torque adjustment process of the present invention. DETAILED DESCRIPTION

[0021] Reference Figure 3 As shown, the present invention provides a method for adjusting the torque of a dual-axis electronic product, which is adjusted for a dual-axis hinge. Since electronic products require a smaller axis volume, during testing, the volume of each axis of a dual-axis hinge is much smaller than that of a single axis, and there are differences in the clamping method and the torque adjustment method. The present invention includes the following steps:

[0022] A. Position the shaft to be tested on the torque tester. The torque tester fixes the shaft through the positioning pin, and then buckles one end of the shaft with the torque measuring rod on the swing mechanism. The shaft is a double shaft with a large shaft and a small shaft. The large shaft is provided with a large shaft nut for adjusting the tightness of the large shaft, and the small shaft is provided with a small shaft nut for adjusting the tightness of the small shaft;

[0023] B. The swing mechanism rotates the shaft in the forward and reverse directions alternately, and sets the number of swings to obtain the average torque values ​​of the shaft in the forward and reverse directions respectively. The torque tester transmits the peak value of the dynamic torque value of the small shaft to the PLC for determination. The PLC obtains the peak value of the forward and reverse torque corresponding to the number of swing settings according to the number of swing settings, and then calculates the average value of the forward and reverse torque of the shaft in the number of swing settings by taking the average value of the measured peak values ​​of the forward and reverse torque of the shaft;

[0024] C. Compare the difference between the average torque values ​​of the forward and reverse rotating shafts for a limited number of times. If the difference is greater than the first set difference, adjust the large shaft nut and return to step B; if the difference is less than the first set difference, proceed to step D. In this embodiment, the set difference is 0.3. When the average difference between the forward and reverse torque values ​​of the small shaft is greater than 0.3, the torque adjustment mechanism adjusts the large shaft nut by (average forward torque value of the small shaft - average reverse torque value of the small shaft) * torque adjustment coefficient. The above torque adjustment coefficient varies according to different material properties.

[0025] D. Alternately rotate the small shaft in the forward and reverse directions and obtain the average torque value of the small shaft. If the average torque value of the small shaft is within the normal torque range of the small shaft, proceed to step E. If the average torque value of the small shaft is outside the normal torque range of the small shaft, adjust the small shaft nut and repeat step D.

[0026] E. Alternately rotate the main shaft in forward and reverse directions and obtain the average torque value of the main shaft. If the average torque value of the main shaft is outside the normal range of the main shaft torque, adjust the main shaft nut and repeat step E. If the average torque value of the main shaft is within the normal range of the main shaft torque, end.

[0027] The above-mentioned average torque value of the small shaft does not refer to the average torque value of the small shaft itself, but refers to the average torque value of the entire rotating shaft. Since it belongs to the range of adjusting the small shaft, it is defined as the average torque value of the small shaft, and the average torque value of the large shaft is referred to in the same way as above.

[0028] As a further description of the above-mentioned method for adjusting the torque of dual shafts of electronic products, step C sets the number of repeated comparison differences. If the number of executions is greater than the number of repetitions, the shaft to be tested is marked as defective. For defective products tested, this solution determines defective products by setting a limited number of repeated comparison differences.

[0029] As a further description of the above-mentioned dual-shaft torque adjustment method for an electronic product, in step D, the maximum value and minimum value of the small-shaft torque are set, and the normal range of the small-shaft torque is between the maximum value and the minimum value of the small-shaft torque. Taking the small-shaft torque minimum value in this scheme as 1.0kgf·cm as an example, when the tested small-shaft torque average value is <1.0kgf·cm, the small-shaft servo motor starts to tighten in the forward direction until the rotational torque of the servo reaches the set rotational torque, and then the motor stops rotating. The tightening degree can be adjusted by the internal PID algorithm to obtain the number of pulses required for the small-shaft servo to adjust to the middle value of the small-shaft set torque. After adjustment, step D still needs to be repeated to measure the average value.

[0030] As a further description of the above-mentioned method for adjusting the torque of the dual-shaft of the electronic product, in step E, the maximum value and the minimum value of the torque of the large shaft are set, and the normal range of the torque of the large shaft is between the maximum value and the minimum value of the torque of the large shaft. Similar to the adjustment of the torque of the small shaft, the average value of the torque of the large shaft needs to be within the normal range of the torque of the large shaft, otherwise it needs to be adjusted and the measurement of step E needs to be repeated.

[0031] As a further description of the dual-shaft torque adjustment method for the electronic product, the following steps are also included before step B: adjusting the main shaft nut to set the initial shaft torque.

[0032] Reference Figure 1-2A dual-shaft torque adjustment device for electronic products includes a torque testing machine, a swing mechanism 5 and a torque adjustment mechanism. The torque adjustment mechanism is provided with a large shaft adjustment end 6 and a small shaft adjustment end 7, and the large shaft adjustment end and the small shaft adjustment end respectively correspond to the large shaft nut 1 and the small shaft nut 2 of the adjustment shaft; the torque testing machine fixes the small shaft 3 of the shaft through a locating pin and obtains the torque value of the shaft, the swing mechanism clamps the large shaft 4 of the shaft, and the swing mechanism drives the shaft to rotate around the small shaft and the large shaft.

[0033] As a further description of the above-mentioned dual-axis torque adjustment device for electronic products, the torque adjustment mechanism is fixed on the servo lifting cylinder and the shaft servo motor. The servo lifting cylinder drives the large shaft adjustment end and the small shaft adjustment end to move up and down, and the shaft servo motor drives the large shaft adjustment end and the small shaft adjustment end to rotate. For the above-mentioned shaft servo motor, it is a large shaft servo motor and a small shaft servo motor that drive the large shaft adjustment end and the small shaft adjustment end to rotate separately. The large shaft adjustment end and the small shaft adjustment end can be twisted separately by the shaft servo motor to achieve tightness adjustment. The servo lifting cylinder is respectively provided with a large shaft servo lifting cylinder and a small shaft servo lifting cylinder to adjust the upper and lower positions of the large shaft adjustment end and the small shaft adjustment end respectively. In the process of positioning with the shaft, position sensing is performed through the magnetic sensors of the large shaft adjustment end and the small shaft adjustment end. When in place, various actions can be performed.

[0034] As a further description of the dual-axis torque adjustment device for electronic products, the swing mechanism is provided with a rotating platform and a torque measuring clamping end, the torque measuring clamping end clamps the large rotating axis, and the rotating platform rotates horizontally around the rotating axis.

[0035] The above description does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for adjusting the torque of a dual-shaft electronic product, which uses a dual-shaft electronic product torque adjustment device, including a torque tester, a swing mechanism and a torque adjustment mechanism, characterized in that: The torque adjustment mechanism is provided with a large shaft adjustment end and a small shaft adjustment end, and the large shaft adjustment end and the small shaft adjustment end respectively correspond to the large shaft nut and the small shaft nut of the adjustment shaft; the torque testing machine fixes the small shaft of the shaft through a positioning pin and obtains the torque value of the shaft, and the swing mechanism clamps the large shaft of the shaft, and the swing mechanism drives the shaft to rotate; The above-mentioned electronic product dual-shaft torque adjustment method comprises the following steps: A. Position the rotating shaft to be tested on the torque testing machine. The rotating shaft is a double rotating shaft having a large rotating shaft and a small rotating shaft. The large rotating shaft is provided with a large shaft nut for adjusting the tightness of the large rotating shaft, and the small rotating shaft is provided with a small shaft nut for adjusting the tightness of the small rotating shaft; B. rotating the shaft in forward and reverse directions alternately to obtain the average torque of the shaft in forward and reverse rotations respectively; C. Compare the difference between the average torque values ​​of the shaft in forward and reverse rotation for a limited number of times. If the difference is greater than the first set difference, adjust the large shaft nut and return to step B; if the difference is less than the first set difference, proceed to step D; D. Alternately rotate the small shaft in forward and reverse directions and obtain the average torque value of the small shaft. If the average torque value of the small shaft is within the normal torque range of the small shaft, proceed to step E. If the average torque value of the small shaft is outside the normal torque range of the small shaft, adjust the small shaft nut and repeat step D. E. Alternately rotate the large shaft in forward and reverse directions and obtain the average torque value of the large shaft. If the average torque value of the large shaft is outside the normal range of the large shaft torque, adjust the large shaft nut and repeat step E. If the average torque value of the large shaft is within the normal range of the large shaft torque, end.

2. The method for adjusting the torque of a dual-shaft electronic product according to claim 1, characterized in that: Step C sets the number of times to repeat the difference comparison. If the number of executions is greater than the number of repetitions, the shaft to be tested is marked as defective.

3. The method for adjusting the torque of dual-shafts of electronic products according to claim 1, characterized in that: In step D, the maximum value and the minimum value of the small shaft torque are set, and the normal range of the small shaft torque is between the maximum value and the minimum value of the small shaft torque.

4. The method for adjusting the torque of dual-shafts of electronic products according to claim 1, characterized in that: In step E, the maximum value of the main shaft torque and the minimum value of the main shaft torque are set, and the normal range of the main shaft torque is between the maximum value of the main shaft torque and the minimum value of the main shaft torque.

5. The method for adjusting the torque of dual-shafts of electronic products according to claim 1, characterized in that: The following steps are also included before step B: adjusting the main shaft nut and setting the initial shaft torque.

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