TWM578631U - Screw service life inspection device for machining center - Google Patents

Abstract

The present invention proposes a screw life detecting device for a comprehensive processing machine for detecting a decay state of a screw of an integrated processing machine, which mainly comprises a displacement sensor, a signal capturing unit and a controller; the displacement sensor is disposed adjacent to The position of the screw of the integrated processing machine is used to detect the moving position of the nut, and then the signal of the displacement sensor is read by the capturing unit, and the converted value is transmitted to the macro program unit of the controller. Through the macro program unit to determine whether the amount of screw backlash used for a long time changes, to achieve a fast and intuitive detection of screw life decline.

Description

Screw life detecting device for integrated processing machine

This creation is about a screw life detecting device, especially one that uses a displacement sensor and a network communication technology to monitor and judge the life of the screw, so as to immediately and intuitively judge the life of the screw, and avoid the degradation of the processing quality. loss.

Nowadays, the integrated processing machine industry is moving towards high speed and high precision. However, high speed conditions are also accompanied by high feed rate to achieve high machine rate, but this will cause the feed shaft-screw to accelerate wear. Even with the acceleration to shorten the screw life, it has become one of the factors affecting the processing precision and utilization rate of the integrated processing machine. Because in the long-term high-speed, high-load working environment, the ball of the screw will have a backlash due to wear, and then the pre-pressure gradually disappears, and the positioning accuracy is relatively lowered. To this end, the traditional devices and methods for detecting the failure life of the integrated machine screw are:

(1) Using the torque measurement to measure the pre-compression torque and then estimating the change in the pre-pressure.

(2) Using the vibration sensor to measure the ball pass frequency of the ball screw to determine the pre-pressure; in order to provide an accurate rate for judging the pre-pressure failure, the academic community proposes various mathematical methods (such as spectrum analysis, empirical mode decomposition, or Intrinsic modal function, etc.) to determine the screw life failure situation.

However, this conventional technique requires the purchase of expensive sensing equipment and mathematically complicated calculation methods to estimate the change of the screw pre-pressure and to know the screw life failure state, but it is necessary to invest in high-cost labor/instrument expenditure. Less economical.

In view of the above, there is a need for a tool machine screw life rapid detection device to solve the problems caused by the conventional technology.

The main purpose of this creation is to provide a screw life detecting device for a comprehensive processing machine, which uses a displacement sensor, a signal capturing unit and a controller to detect the absolute position of the machine tool feed axis, the backlash correction amount and the actual displacement value. To determine whether the pre-pressure changes, and then learn the trend of screw life decline.

In order to achieve the above object, the preferred technical solution of the screw life detecting device of the integrated processing machine includes a displacement sensor, a signal capturing unit and a controller disposed in an integrated processing machine, wherein:

The displacement sensor is an induction device for sensing displacement of the screw of the integrated processing machine, and is installed in a non-machining area of the screw of the integrated processing machine for sensing the position of the nut on the screw after the round trip And returning the measured displacement signal to the signal acquisition unit for reading;

The signal acquisition unit is connected to the displacement sensor for capturing the displacement signal obtained by the displacement sensor, and has a single chip processing and operation for performing digital conversion and filtering noise interference, and The controller is linked;

The controller is a control device disposed in the integrated processing machine to perform system monitoring, calculation/decision data, and includes a macro program unit, wherein the macro program unit of the controller commands the integrated processing machine to The amount of backlash caused by the reciprocating movement of the nut of the screw can be monitored by the displacement sensor and the signal extraction unit, and the controller determines whether the amount of backlash of the screw changes.

Preferably, in the screw life detecting device of the integrated processing machine, the displacement sensor is a non-contact eddy current sensor, an infrared sensor, a laser sensor, a capacitive sensor, and a fiber optic sensation. One of the detectors or contact probes.

Preferably, in the screw life detecting device of the integrated processing machine, the eddy current sensor is mounted on a screw side of the integrated processing machine through a mounting frame, so that the eddy current sensor probe corresponds to the screw One end of the nut.

Preferably, in the screw life detecting device of the integrated processing machine, the signal capturing unit is connected to the displacement sensor by wire or wirelessly.

Preferably, in the screw life detecting device of the integrated processing machine, the screw of the integrated processing machine is a table screw and a spindle screw.

The creation utilizes the provided screw life rapid detection device of the machine tool, and the specific benefit that can be obtained is that the absolute position of the feed axis, the backlash correction amount and the actual displacement can be grasped through the macro program unit included in the controller. Value, to quickly and automatically determine the life of the screw to facilitate customers to know the screw to produce an abnormal state for repair, to avoid the unexpected downtime caused by the loss of time and product.

The structural features of the present creation and other functions and purposes are described in detail in the following embodiments:

Referring to FIG. 1 and FIG. 2, a preferred embodiment of the screw life detecting device of the integrated processing machine includes: a displacement sensor 1 and a signal capturing unit 2 disposed in a comprehensive processing machine 10. And a controller 3, wherein:

The displacement sensor 1 is an inductive device for sensing displacement of the screw 101 of the integrated processing machine 10, preferably using a conventional non-contact eddy current sensor 11, as shown in FIG. The eddy current sensor 11 is mounted on the non-machining area (detection area) side of the screw 101 of the integrated processing machine 10 through the mounting frame 12, and includes a table screw of the X-axis and the Y-axis of the table and a spindle screw of the Z-axis. The eddy current sensor 11 probe corresponds to an end surface of the nut 102 on each of the screws 101, and is a distance that the eddy current sensor 11 can sense, and the electromagnetic field of the eddy current sensor 11 is used. The position of the nut 102 after the round trip is sensed, and the measured displacement signal can be fed back to the signal extraction unit 2 to be read. The eddy current sensor 11 is only one of the preferred embodiments of the present invention. In other embodiments, an infrared sensor, a laser sensor, a capacitive sensor, a fiber sensor or a contact may also be used. The probe still has the effect of sensing displacement.

The signal capturing unit 2 is connected to the displacement sensor 1 and is configured to capture a displacement signal obtained by the displacement sensor 1 and includes a single chip processing and operation for performing digital conversion and filtering. The interference is obtained to obtain the correct displacement data, and the signal extraction unit 2 is connected to the controller 3 described above. The signal capture unit 2 is connected to the displacement sensor 1 by wire or wirelessly, and the wired mode can be connected to the displacement sensor 1 through a USB cable or an Ethernet route, and the wireless mode can pass WIFI or blue. The bud technique is coupled to the displacement sensor 1.

The controller 3 is a control device for performing system monitoring, calculation/decision data in the integrated processing machine, and includes a macro program unit, by which the controller commands the integrated processing machine 10 to allow the screw 101 to reciprocate The amount of backlash caused by the moving process is monitored by the displacement sensor 1 and the signal capturing unit 2, and the controller 3 determines whether the amount of backlash used by the screw 101 for a long time changes, thereby analyzing the life of the screw. The macro program unit is a macro program that can detect the backlash amount of the current feed axis at any time to determine the backlash amount and the life of the screw.

Referring to FIG. 1 and FIG. 3, when the screw machine life detecting device of the integrated processing machine is used, the macro processing unit of the controller 3 commands the integrated processing machine 10 to make the nut 102 on the screw 101 and work. The stage 103 moves to the detection area (non-processing area), and then the position of the nut 102 is sensed by the electromagnetic field of the displacement sensor 1 (the eddy current sensor 11), and the sensing signal is fed back to the signal extraction unit 2, Then, the nut 102 and the table 103 on the screw 101 are reciprocated and returned to the original position, and the position of the nut 102 is sensed again by the electromagnetic field of the displacement sensor 1 (the eddy current sensor 11). Similarly, the sensing signal is fed back to the signal capturing unit 2, and the signal is converted and transmitted to the controller 3 via the signal capturing unit 2, that is, the back of the screw 101 can be compared by the macro program unit of the controller 3. The amount of gap.

The effect achieved by the screw life detecting device of the integrated processing machine is that, in the screw life detecting function, the screw can be used to collect the displacement, the mechanical coordinate and the backlash correction value signal from the short-distance reciprocating motion during the warm-up phase before the customer is processed. Comparison and statistical calculations to complete the fast and accurate detection of screw life; this method can improve the conventional screw life detection technology, which requires the purchase of expensive vibration sensors to sense the vibration energy of the screw movement process, through the complicated time-consuming Mathematical operations to screen out characteristic signals that may be related to screw life and establish mathematical models.

In summary, the screw life detecting device of the integrated processing machine has been practical and creative, and the application of its technical means is also novel and undoubted, and the efficacy and design purpose are in line with the fact that it has been reasonably improved. To this end, a new type of patent application is filed in accordance with the law, but the bureau is requested to give a detailed examination and grant the patent as a prayer.

10‧‧‧Comprehensive processing machine

101‧‧‧ screw

102‧‧‧ nuts

103‧‧‧Workbench

1‧‧‧ Displacement Sensor

11‧‧‧ eddy current sensor

12‧‧‧ Mounting frame

2‧‧‧Signal capture unit

3‧‧‧ Controller

31‧‧‧Macro program unit

Fig. 1 is a schematic view showing the installation of the displacement sensor of the screw life detecting device of the integrated processing machine. FIG. 2 is a schematic overall block diagram of the screw life detecting device of the integrated processing machine. Fig. 3 is a schematic view showing the execution steps of the screw life detecting device of the integrated processing machine.

Claims (5)

A screw life detecting device for a comprehensive processing machine, comprising a displacement sensor disposed in an integrated processing machine, a signal capturing unit and a controller, wherein: the displacement sensor is a screw of the integrated processing machine a sensing device for sensing displacement, which is installed in a non-machining area of the screw of the integrated processing machine for sensing the position of the nut on the screw after the round trip, and feeding back the measured displacement signal to the signal The signal capture unit is connected to the displacement sensor for capturing the displacement signal obtained by the displacement sensor, and has a single wafer processing and operation for digital conversion and filtering. Noise interference, and is coupled to the controller; the controller is a control device disposed in the integrated processing machine to perform system monitoring, calculation/decision data, and includes a macro program unit, and the macro of the controller The program unit commands the integrated processing machine to cause the backlash of the screw nut to be reciprocated, and can be monitored by the displacement sensor and the signal extraction unit. And the amount of backlash by controller determines whether a change of the screw. The screw life detecting device of the integrated processing machine according to claim 1, wherein the displacement sensor is a non-contact eddy current sensor, an infrared sensor, a laser sensor, a capacitive sensor, and an optical fiber. One of a sensor or a contact probe. The screw life detecting device of the integrated processing machine according to claim 2, wherein the eddy current sensor is mounted on a table screw and a spindle screw side of the integrated processing machine through a mounting frame, so that the eddy current sensor The probe corresponds to one end of the nut on the screw. The screw life detecting device of the integrated processing machine according to claim 1, 2 or 3, wherein the signal capturing unit is connected to the displacement sensor by wire or wirelessly. The screw life detecting device of the integrated processing machine according to claim 1, wherein the screw of the integrated processing machine is a table screw and a spindle screw.