TWI390198B - A linear frictional resistance measurement device - Google Patents

Description

Linear friction resistance measuring device

The present invention relates to a linear frictional resistance measuring device, and more particularly to a linear frictional resistance measuring device.

With the development and application of semiconductor industry and nanotechnology, the demand for nano-level positioning platform is growing rapidly and it is also one of the key technologies for future technology development. Nowadays, linear slide products have been widely used in precision machinery, automation, Various power transmission, semiconductor, medical and aerospace industries are further applied to high-precision micro-motion positioning platforms. At present, the detection technology for high-precision lead screws is very mature at home and abroad, but for linear sliding The detection technology of the track is still in its infancy.

The movement of the ball linear slide is mainly caused by the relative rolling and sliding movement of the ball between the slider and the slide rail, so that when the slider and the ball have relative movement, rolling friction or sliding friction occurs. The ball will also rub against the adjacent ball or retainer in the return path. The friction is frictional. Although the rolling frictional resistance is less than the sliding frictional resistance, it has a considerable influence on the high-precision machine. The friction phenomenon of linear slides reduces system accuracy, work efficiency and working life. Therefore, how to effectively control the accuracy of the product is an urgent need to construct technology.

When the linear slide slider and the slide rail move relative to each other, friction will occur, resulting in wear, thermal deformation, reduced accuracy and work efficiency. Influence, so how to effectively reduce the relative friction between the linear slide slider and the rails is a must.

At present, the detection technology of high-precision lead screw is very mature at home and abroad, and there are many kinds of measuring machines, but the detection technology of linear slides is still in the germination stage. At present, the general manufacturers are testing the linear sliding rail friction. In terms of the amount of resistance, the frictional resistance of the linear slide is detected by means of sample sampling. It is not tested for each sample, and the detection method is also detected by manual comparison using the traditional force scale test method. At the same time, it does not meet the labor cost, and the detected value will vary from person to person. Therefore, how to construct a time-saving, fast and high-precision linear sliding friction resistance measurement system is the invention or creation background of this patent.

By using the invention, the frictional force of the linear slide rail can be detected, thereby making appropriate adjustments to reduce the frictional resistance, thereby prolonging the service life of the linear slide rail and improving the product precision.

The object of the present invention is to provide a linear frictional resistance measuring device with a force gauge and a control system, which can measure the driving current of the linear motor by constant velocity control, and then convert the formula to obtain linear sliding rail friction. resistance.

A second object of the present invention is to provide a linear frictional resistance measuring device having the frictional resistance for detecting linear slides, sliders and balls, and improving system detection speed and product accuracy.

Another object of the present invention is to provide a linear frictional resistance measuring device which uses a dual vector measuring push-pull force meter which displays the frictional resistance of the linear sliding rail, the slider and the ball, by which the measuring system The distribution of frictional resistance of linear slides, sliders and balls during movement is obtained.

A linear frictional resistance measuring device capable of achieving the above object includes: a base; a linear motor fixed to the base for providing a driving force; and a slide fixing base disposed on the base for Fixing and carrying a linear device; a linear unit is a combination of a slide rail and a slider, the slider can slide on the slide rail; a coupling rod containing at least one force gauge (connecting link), which is used to connect a linear motor and a slider, and provides a slider driven by a linear motor, and also converts information such as a change in the displacement of the slide rail or the slider into an electrical signal output.

Wherein, the coupling rod containing at least one push-pull force gauge can be replaced by a beam for loading in another embodiment, the thrust beam also providing information such as a change in the displacement of the slide rail or the slider into an electrical signal. The effect of the output.

Referring to FIG. 1 and FIG. 2, the linear frictional resistance measuring device provided by the present invention provides the detection of the frictional resistance of the linear slide rail (21), the slider (22) and the ball. At the same time, the system detection speed and product accuracy are improved, which mainly include: a linear motor (1), a slide rail mount (6), a linear device (2), and a coupling rod (31) including at least one push-pull force gauge (32). ) constitutes.

The linear motor (1) is fixed on the base (5) for providing a driving force; the slide rail fixing seat (6) is disposed on the base (5) for fixing and carrying the linear device (2); The linear device (2) is a combination of a slide rail (21) and a slider (22), the slider (22) is slidable on the slide rail (21); and the joint containing at least one push-pull force gauge (32) The rod (31) is used to connect the linear motor (1) and the slider (22), and the slider (22) is driven by the linear motor (1), and the displacement of the slide rail (21) or the slider (22) is also provided. The information such as the change is converted into an electrical signal output.

Referring to FIG. 3, another embodiment of the present invention mainly includes: the linear motor (1) is fixed on the base (5) for providing a driving force; and the sliding rail fixing seat (6) is disposed on the base ( 5) upper for fixing and carrying the linear device (2); the linear device (2) is a combination of a slide rail (21) and a slider (22), the slider (22) being movable on the slide rail ( 21) upper sliding; the thrust beam (4) is used to connect the linear motor (1) and the slider (22), and the sliding block (22) is driven by the linear motor (1), and the sliding rail (21) or sliding Information such as changes in the displacement of the block (22) is converted into an electrical signal output.

In the present invention, the object to be detected is a slide rail (21) or a slider (22), and the measuring system is driven by a linear motor (1) as an active member via a coupling rod (31) (or a thrust beam (4)). The slider (22) moves, and the driving current of the linear motor (1) is measured by constant velocity control, and then by the conversion of the formula, the line can be obtained by the force gauge (32) (or the thrust beam (4)). Frictional resistance of the slide rail (21) and the slider (22).

The linear motor (1) of the measuring system is an electromagnetically driven actuator, which only has frictional resistance with air during the movement, and the frictional resistance can be regarded as zero frictional resistance, so the measurement process does not affect the measurement. The result.

Before using the force gauge (32) (or thrust beam (4)) to measure the frictional resistance of the linear slide (21) and the slider (22), the gauge must be applied to the gauge (32) (or thrust beam) (4)) Perform system calibration by comparing the voltage signals measured by the force gauge (32) (or the thrust beam (4)), and you can know when the force gauge (32) (or the thrust beam (4) )) The measured voltage signal is different from the voltage signal when the slider (22) is pushed, so that the frictional resistance between the slider (22) and the slide rail (21) is generated.

The system architecture is in the friction force measurement, and the two double-vector-measured push-pull force gauges (32) are integrated into the connecting rod (31) of the fixed jig (33), so that the connecting rod (31) and the slider (22), The linear motor (1) moves synchronously. When measuring, the force gauge (32) displays the frictional resistance of the linear slide (21) and the slider (22), and the linear slide can be obtained by the measurement system (21). , slider (22) and the distribution of frictional resistance when the ball is moving.

The linear frictional resistance measuring device provided by the present invention has the following advantages when compared with the foregoing cited documents and other conventional techniques: 1. The present invention can be used to detect the frictional resistance of a linear sliding rail.

2. The invention is used to reduce the adjustment of friction to component losses.

3. The invention can improve the accuracy and working rate of the current detection technology.

The detailed description of the preferred embodiments of the present invention is intended to be limited to the scope of the invention, and is not intended to limit the scope of the invention. The patent scope of this case.

In summary, this case is not only innovative in terms of space type, but also can enhance the above-mentioned multiple functions compared with the customary items. It should fully comply with the statutory invention patent requirements of novelty and progressiveness, and apply for it according to law. This invention patent application, in order to invent invention, to the sense of virtue.

1‧‧‧Linear motor

2‧‧‧Linear device

21‧‧‧Slide rails

22‧‧‧ Slider

31‧‧‧ Connecting rod

32‧‧‧Pushing force meter

33‧‧‧fixed fixture

4‧‧‧Tighter beam

5‧‧‧Base

6‧‧‧Slide rail mount

1 and 2 are schematic views of a first embodiment of a linear frictional resistance measuring device according to the present invention; and FIG. 3 is a schematic view showing a second embodiment of the linear frictional resistance measuring device of the present invention.

1‧‧‧Linear motor

2‧‧‧Linear device

21‧‧‧Slide rails

22‧‧‧ Slider

31‧‧‧ Connecting rod

32‧‧‧Pushing force meter

33‧‧‧fixed fixture

4‧‧‧Tighter beam

5‧‧‧Base

6‧‧‧Slide rail mount

Claims (5)

A linear friction resistance measuring device comprises: a linear motor for providing driving force; a linear device, which is a combination of a sliding rail and a slider, the slider can slide on the sliding rail; and contains at least one push-pull force gauge The coupling rod is used to connect the linear motor and the slider, and the slider is driven by the linear motor, and the information such as the change of the displacement of the slide rail or the slider is converted into an electrical signal output. The linear frictional resistance measuring device according to claim 1 , wherein the linear motor drives the slider to move through the connecting rod, and the driving current of the linear motor is measured by constant velocity control, so that the force gauge can be used. Obtain the frictional resistance of the linear slide or slider. The linear frictional resistance measuring device according to claim 1 , wherein the push-pull force gauge is two dual-vector measuring devices. A linear friction resistance measuring device comprises: a linear motor for providing driving force; a linear device, which is a combination of a sliding rail and a sliding block, the sliding block can slide on the sliding rail; the thrust beam is used for coupling The linear motor and the slider provide the slider to be driven by the linear motor, and also convert information such as changes in the displacement of the slide rail or the slider into an electrical signal output. The linear frictional resistance measuring device according to claim 4 , wherein the linear motor drives the slider to move through the thrust beam, and the driving current of the linear motor is measured by constant velocity control, so that the force gauge can be used. Obtain the frictional resistance of the linear slide or slider.