CN-116797198-B - Maintenance method and system for linear transmission device

Abstract

A maintenance method of linear transmission device is suitable for calculating life value of linear transmission device and includes receiving multiple electric signals fed back by sensing units installed on linear transmission device and driving device, calculating at least 4 kinds of correction factors according to electric signals, and calculating life value according to electric signals and correction factors. Therefore, the service life value estimation accuracy can be improved because the calculation is carried out according to the actual use condition, and equipment manufacturers can more accurately arrange maintenance or part replacement strokes according to the actual condition of the machine.

Inventors

• CAI SHANGHUA
• LIN YUXIN
• LIN MENGYING

Assignees

• 上银科技股份有限公司

Dates

Publication Date

20260508

Application Date

20220314

Claims (6)

1. 1. The maintenance method of the linear transmission device is applied to a control unit of a signal connection driving device, the driving device is used for driving the linear transmission device, and the maintenance method of the linear transmission device is suitable for calculating the service life value of the linear transmission device and is characterized in that: the maintenance method of the linear transmission device comprises the following steps: Receiving a plurality of electric signals fed back by a sensing unit arranged on the linear transmission device and the driving device, calculating at least 4 correction factors according to the electric signals, calculating the service life value according to the electric signals and the correction factors, Wherein 5 correction factors are calculated according to the information of stress, stroke, speed, temperature and acceleration in the electric signal respectively, the 5 correction factors are respectively a load correction factor, a stroke correction factor, a speed correction factor, a temperature correction factor and an impact correction factor, Calculating the actual working equivalent according to the electric signal and the correction factor by the following formula And according to the actual working equivalent Calculating the life value: Wherein, the For the temperature correction factor to be used, For the stroke correction factor to be used, For the impact correction factor to be used, For the load correction factor to be used, For the speed correction factor to be used, In order to be an interval average load, As the interval average rotational speed, As the period average rotational speed of the motor, In order to be an interval time, In order for the cycle time to be a time period, For the number of intervals in a cycle, In the following When the load correction factor is calculated according to the following formula If not, make : Wherein, the For the maximum stress value obtained from the electrical signal, In order for the load factor to be a function of, When the temperature corresponding to the electrical signal is 80-200 ℃, calculating the temperature correction factor according to the following formula If not, make : Wherein, the In order to be able to determine the temperature, 、 、 、 Four temperature coefficients.
2. 2. The method of claim 1, wherein at least 2 correction factors are non-linearly related to the electrical signal associated with at least 4 of stress, travel, speed, temperature and acceleration.
3. 3. The method for maintaining a linear actuator according to claim 2, wherein an actual working equivalent is calculated based on the electric signal and the correction factor, and the lifetime value is calculated based on the actual working equivalent.
4. 4. The method for maintaining a linear actuator according to claim 1, wherein the fuel consumption variable related to the fuel consumption is calculated according to the following formula : ; Wherein, the 、 Are all the oil consumption coefficients, and are all the oil consumption coefficients, In order to allow for the highest load to be applied, For the actual highest load obtained from the electrical signal, In order to allow the highest DN value to be reached, The DN value is the product of the outer diameter of the long shaft of the linear transmission device and the rotating speed.
5. 5. A linear drive maintenance system for implementing the linear drive maintenance method of claim 1, comprising a linear motion unit: The linear motion unit comprises a linear transmission device and a driving device for driving the linear transmission device; the method is characterized in that: The linear transmission device maintenance system further comprises a sensing unit and a control unit; The sensing unit is arranged on the linear motion unit and is used for sensing the operation of the linear motion unit and outputting a plurality of electrical signals; The control unit is in signal connection with the linear motion unit and the sensing unit and is used for controlling the linear motion unit to operate, calculating at least 4 correction factors according to the electrical signal, and calculating the service life value of the linear transmission device according to the electrical signal and the correction factors.
6. 6. The linear actuator maintenance system of claim 5 wherein the linear actuator has a long axis, a moving member disposed on the long axis and defining at least one return channel, and a plurality of rolling members rolling between the long axis and the moving member and in the at least one return channel, one of the inlets and outlets of the rolling members into and out of the at least one return channel being defined as a return point, and the sensing unit includes a sensor disposed on the moving member, the distance between the sensor and the return point in the direction in which the long axis extends being less than 3 times the diameter of the rolling member.

Description

Maintenance method and system for linear transmission device Technical Field The present invention relates to a device maintenance method and system, and more particularly, to a linear driving device maintenance method and system using the same. Background After long-term use, the inlet and outlet of the return pipeline of the linear transmission device is easy to be degraded by fatigue, and when the degradation reaches a certain degree, the elements need to be maintained and replaced to ensure the processing quality. Currently, machine maintenance is usually performed by annual maintenance or regular maintenance, or further, the operation accumulation time or the operation accumulation cycle number is used to determine whether to repair or replace the component. However, since the processing objects of the machine during each operation are different, the loads are different, and the service lives of the machine during each operation are different, that is, even if the same operation accumulation time or operation accumulation cycle number exists, different service life losses are caused under the use state of different loads, if the residual service lives are estimated only by the preset operation accumulation time or operation accumulation cycle number, the service life estimation is inaccurate. Disclosure of Invention The invention aims to provide a maintenance method of a linear transmission device with higher service life estimation accuracy. The maintenance method of the linear transmission device is applied to a control unit of a signal connection driving device, the driving device is used for driving the linear transmission device, the maintenance method of the linear transmission device is suitable for calculating the service life value of the linear transmission device, and the maintenance method comprises the following steps: and receiving a plurality of electric signals fed back by a sensing unit arranged on the linear transmission device and the driving device, calculating at least 4 correction factors according to the electric signals, and calculating the service life value according to the electric signals and the correction factors. According to the maintenance method of the linear transmission device, at least 2 correction factors are in nonlinear relation with the corresponding electrical signals, and the electrical signals are related to at least 4 of stress, travel, speed, temperature and acceleration. According to the maintenance method of the linear transmission device, 5 correction factors are calculated according to the information of stress, travel, speed, temperature and acceleration in the electric signals, and the 5 correction factors are respectively a load correction factor, a travel correction factor, a speed correction factor, a temperature correction factor and an impact correction factor. According to the maintenance method of the linear transmission device, the actual working equivalent is calculated according to the electric signal and the correction factor, and the service life value is calculated according to the actual working equivalent. According to the maintenance method of the linear transmission device, the actual working equivalent F act is calculated according to the electric signal and the correction factor according to the following formula, and the service life value is calculated according to the actual working equivalent F act: Wherein a t is the temperature correction factor, a s is the stroke correction factor, a i is the impact correction factor, a f is the load correction factor, a r is the speed correction factor, F iavg is the section average load, N iavg is the section average rotational speed, N avg is the section average rotational speed, t i is the section time, t cycle is the period time, and N is the number of sections in a period. In the maintenance method of the linear transmission device of the present invention, when P max >2.0GPa, the load correction factor a f is calculated according to the following formula, if not, a f =1: Af＝af×Pmax3; Wherein P max is the maximum stress value obtained according to the electric signal, and a f is the load factor. According to the maintenance method of the linear transmission device, when the temperature corresponding to the electric signal is 80-200 ℃, the temperature correction factor A t is calculated according to the following formula, if not, the temperature correction factor A t =1 is calculated: At＝at1×T3+at2×T2+at3×T+at4; wherein T is temperature, and a t1、at2、at3、at4 is four temperature coefficients. The maintenance method of the linear transmission device also calculates the oil consumption variable f related to the oil consumption according to the following formula: wherein a o、bo is two fuel consumption coefficients, F MAX is the allowable highest load, F op is the actual highest load obtained according to the electric signal, DN MAX is the allowable highest DN value, DN op is the actual highe