Z-axis shockproof structure and three-coordinate measuring machine

Abstract

The present application relates to a kind of Z-axis shockproof structure and three-coordinate measuring machine, including high-precision Z-axis, shock absorber component, probe mounting seat;The shock absorber component is set to the lower end of the high-precision Z-axis, and with the high-precision Z-axis rigid connection, the probe mounting seat is set in the lower end of the shock absorber component, and with the shock absorber component rigid connection, the probe mounting seat is used to install probe, the shock absorber component will produce vibration mechanical energy absorption, to reduce the influence caused by the high-precision Z-axis movement to the probe.Effectively solve the problem that three-coordinate measuring machine motion sampling point, Z-axis dithering influence measurement accuracy.Can be replaced by material, shape, size etc., meet the demand of various types of measuring machine, wide application range.Can also be connected by probe mounting seat different kinds of probes, with wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of three-coordinate measurement, in particular to a Z-axis shockproof structure and a three-coordinate measuring machine. BACKGROUND

[0002] Coordinate measurement technology is mainly applied to geometric measurement. Any shape is composed of space points. In theory, all geometric measurements can be attributed to the measurement of space points. Therefore, accurate space point coordinate collection is performed, and the coordinate values of these points are processed by a computer to fit measurement elements, and the shape, position and other geometric data can be obtained through mathematical operation.

[0003] A three-coordinate measuring machine is a high-efficiency precision measuring instrument based on coordinate measurement technology, which mainly comprises a main machine, a probe and an electrical system. The probe is installed at the lower end of the Z-axis of the main machine. During the operation of the measuring machine, especially when the probe is sampling, the Z-axis will vibrate slightly, and the sampling coordinate values will deviate from the true values, which will affect the measurement results. This influence is particularly obvious for super-large measuring machines and measuring machines for measurement. SUMMARY

[0004] (1) Technical problem to be solved

[0005] The embodiment of the present application provides a Z-axis shockproof structure and a three-coordinate measuring machine, which solves the technical problem that the Z-axis vibration affects the measurement accuracy when the three-coordinate measuring machine is moving and sampling.

[0006] (2) Technical scheme

[0007] In a first aspect, the embodiment of the present application provides a Z-axis shockproof structure, which comprises a high-precision Z-axis, a shock absorber assembly and a probe mounting seat. The shock absorber assembly is arranged at the lower end of the high-precision Z-axis and is rigidly connected with the high-precision Z-axis. The probe mounting seat is arranged at the lower end of the shock absorber assembly and is rigidly connected with the shock absorber assembly. The probe mounting seat is used for mounting a probe. The shock absorber assembly is used for absorbing the vibration mechanical energy generated by the high-precision Z-axis, so as to reduce the influence on the probe caused by the movement of the high-precision Z-axis.

[0008] Further, the shock absorber assembly comprises a shock absorber seat, a shock absorber sealing cover and shock absorbing balls. The shock absorber seat is provided with a cavity for accommodating the shock absorbing balls. One or more shock absorbing balls are arranged in the cavity and are sealed by the shock absorber sealing cover.

[0009] Further, the opening direction of the cavity is upward.

[0010] Further, the shape of the shock absorber seat is square, and the center of the shock absorber seat is provided with a wire passing hole.

[0011] Further, the shock-absorbing ball is a steel ball.

[0012] Further, high-viscosity damping grease is arranged in the cavity.

[0013] Further, the high-viscosity damping grease is high-viscosity dimethyl silicone oil with a viscosity of 50000cs.

[0014] In the second aspect, a three-coordinate measuring machine with the Z-axis shock-absorbing structure is provided.

[0015] (3) Advantageous effects

[0016] In summary, the shock-absorber assembly can absorb the vibration mechanical energy generated, thereby reducing the influence of the high-precision Z-axis movement on the probe. The problem of Z-axis shaking affecting the measurement accuracy when the three-coordinate measuring machine moves to a sampling point can be effectively solved. By changing the material, shape, size, etc., the needs of various types of measuring machines can be met, and the application range is wide. Different types of probes can be connected through the probe mounting seat, and the application prospect is wide. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0018] Figure 1 is a structural schematic diagram of a Z-axis shock-absorbing structure;

[0019] Figure 2 is an exploded schematic diagram of a Z-axis shock-absorbing structure;

[0020] Figure 3 is Figure 2 is an exploded schematic diagram of a shock-absorber assembly;

[0021] Figure 4 is a structural schematic diagram of a three-coordinate measuring machine

[0022] In the figure: 1, high-precision Z-axis; 2, shock-absorber assembly; 3, probe mounting seat; 21, shock-absorber seat; 22, high-viscosity damping grease; 23, shock-absorbing ball; 24, shock-absorber sealing cover; 100, Z-axis shock-absorbing structure; 1000, three-coordinate measuring machine. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be further described in detail with reference to the drawings and examples. The detailed description and drawings of the following examples are illustrative of the principles of the present application and are not intended to limit the scope of the present application, i.e., the present application is not limited to the described examples, but covers any modifications, substitutions, and improvements of parts, components, and connection manners without departing from the spirit of the present application.

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] Please refer to Figure 1 and Figure 2 , in the first aspect, the embodiments of the present application propose a Z-axis shockproof structure, comprising: a high-precision Z-axis 1, a shock absorber assembly 2, and a probe mounting seat 3. The shock absorber assembly 2 is arranged at the lower end of the high-precision Z-axis 1 and is rigidly connected with the high-precision Z-axis 1. The probe mounting seat 3 is arranged at the lower end of the shock absorber assembly 2 and is rigidly connected with the shock absorber assembly 2. The probe mounting seat 3 is used for mounting a probe. Since the high-precision Z-axis 1, the shock absorber assembly 2, and the probe mounting seat 3 are all rigidly connected with each other, the point sampling accuracy of the probe is not affected. At the same time, the shock absorber assembly 2 has a shock absorption function and can absorb the vibration mechanical energy generated by the slight jitter of the Z-axis during the operation of the measuring machine, especially when the probe is sampling points, thereby reducing the impact of the movement of the high-precision Z-axis 1 on the probe, reducing the deviation between the point sampling coordinate value and the true value, and avoiding the impact on the measurement result. Taking a LM805040 (stroke 8m x 5m x 4m) measuring machine as an example, after the Z-axis shockproof structure 100 is installed thereon, the measurement repeatability is optimized from 0.03mm to 0.01mm, and the measurement accuracy is improved from 20+15L / 1000 microns to 12+12L / 1000 microns.

[0026] In some embodiments, the shock absorber assembly 2 comprises a shock absorber seat 21, a shock absorber sealing cover 24, and shock absorber balls 23. The shock absorber seat 21 is provided with a cavity for accommodating the shock absorber balls 23. One or more shock absorber balls 23 are arranged in the cavity, and the cavity is sealed by the shock absorber sealing cover 24. When the measuring machine is running, the vibration mechanical energy generated by the slight jitter of the Z-axis will be transmitted to the shock absorber balls 23 through the shock absorber seat 21, so that the shock absorber balls 23 vibrate in the cavity, thereby consuming the vibration mechanical energy and reducing the impact on the probe.

[0027] In some embodiments, the opening direction of the cavity is upward, but is not limited to upward. The upward opening is only beneficial for installation, and the opening can also be directed to the inner side, the outer side, or the bottom.

[0028] In some embodiments, the damper seat 21 is square in shape, which can be transformed according to the needs of the high-precision Z-axis 1, and can be circular or other polygons. The center of the damper seat 21 is provided with a wire passing hole to facilitate device wiring and avoid external wiring.

[0029] In some embodiments, the damping ball 23 is a steel ball, and can also be a copper ball, an aluminum ball, or other material balls. The steel ball is only a preferred way of the embodiment.

[0030] In some embodiments, the cavity is provided with high-viscosity damping grease 22. The high-viscosity damping grease 22 has a certain viscosity, and can quickly convert the mechanical energy of the damping ball 23 into heat energy and dissipate it, and can regulate the movement of the damping ball 23.

[0031] In some embodiments, the high-viscosity damping grease 22 is high-viscosity dimethyl silicone oil with a viscosity of 50,000 cs, which has good use effect.

[0032] In a second aspect, a three-coordinate measuring machine using the first aspect is provided, and the three-coordinate measuring machine 1000 is provided with the Z-axis shock absorption structure 100. The generated vibration mechanical energy is absorbed by the damper assembly 2, thereby reducing the impact on the probe caused by the movement of the high-precision Z-axis 1. The problem of Z-axis shaking affecting the measurement accuracy when the three-coordinate measuring machine 1000 moves to sample points can be effectively solved. By changing the material, shape, size, etc., the needs of various types of measuring machines can be met, and the application range is wide. Different types of probes can be connected through the probe mounting seat 3, and have wide application prospects.

[0033] It should be clear that each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment focuses on the differences from other embodiments. The present application is not limited to the specific steps and structures described above and shown in the drawings. Moreover, for the sake of brevity, detailed descriptions of known methods and techniques are omitted.

[0034] The above only describes the embodiments of the present application and does not limit the present application. The present application can have various modifications and changes for those skilled in the art without departing from the scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of claims of the present application.

Claims

1. A Z-axis anti-vibration structure, characterized in that, include: A high-precision Z-axis, a shock absorber assembly, and a probe mounting base are included. The shock absorber assembly is located at the lower end of the high-precision Z-axis and is rigidly connected to it. The probe mounting base is located at the lower end of the shock absorber assembly and is rigidly connected to it. The probe mounting base is used to mount a probe. The shock absorber assembly is used to absorb the mechanical energy of vibration generated by the high-precision Z-axis. The shock absorber assembly includes a shock absorber seat, a shock absorber sealing cover, and shock absorber balls. The shock absorber seat has a cavity for accommodating the shock absorber balls, and one or more shock absorber balls are disposed in the cavity. The shock absorber sealing cover is used to seal the cavity. The opening of the cavity faces upward. The shock absorber seat is square in shape and has a through hole at its center. High-viscosity damping grease is disposed in the cavity.

2. The Z-axis anti-vibration structure according to claim 1, characterized in that, The shock-absorbing balls are made of steel.

3. The Z-axis anti-vibration structure according to claim 1, characterized in that, The high-viscosity damping grease uses high-viscosity dimethyl silicone oil with a viscosity of 50,000 cs.

4. A coordinate measuring machine, characterized in that, The coordinate measuring machine is equipped with a Z-axis anti-vibration structure as described in any one of claims 1 to 3.

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