A method for detecting straightness of machine tool bed guide rails

Abstract

The present invention belongs to the field of machine tool detection, and provides a method for detecting the straightness of a machine tool bed rail. The method uses a set of wire drawing tooling, including a fixed end tooling and a mobile end tooling, wherein the fixed end tooling includes a bracket, a handle push rod is passed through the side plate at one end of the bracket, a pin is provided at the end of the handle push rod, and the side plate at the other end of the bracket is fixedly connected to a roller bracket, and a roller is mounted on the roller bracket. The mobile end tooling includes a connecting part and a clamping part, a nylon rod is arranged laterally on the connecting part, and the clamping part includes two L-shaped plates, one end of the L-shaped plate passes through an adjusting screw, and the other end is fixedly connected to the connecting part, and the clamping part is used to clamp a depth micrometer; the present invention uses the wire drawing method to detect the straightness of the rail, and the readings of various parts of the bed are recorded in segmented detection, so that the straightness of the rail can be calculated. The method of the present invention is easy to operate, can be used for long-distance rail straightness detection, and is suitable for the detection process of the straightness of the rails of a single or multiple machine tool beds, which can greatly reduce the cost investment.

Description

Technical Field

[0001] The invention belongs to the field of machine tool detection, and in particular relates to a method for detecting the straightness of a machine tool bed guide rail, which is suitable for the detection process of the straightness of the bed guide rails of a single or multiple machine tools. Background Art

[0002] The front side reference surface of the bed guide rail is the original reference for machine tool assembly. Its straightness accuracy is related to the overall assembly accuracy of the machine tool and the final operation accuracy.

[0003] The existing machine tool bed rail straightness detection generally adopts the autocollimator detection method. Its advantage is high detection accuracy, but its disadvantage is that it is greatly affected by environmental factors such as temperature and vibration, and the accurate detection distance is short, generally no more than 30 meters.

[0004] For intelligent production line projects, the overall length of the production line is generally more than 100 meters. It involves the overall straightness detection of multiple bed rails, which generally requires a high cost to purchase foreign high-precision detection instruments with a detection radius of more than 100 meters. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for detecting the straightness of a machine tool bed guide rail. The method utilizes a wire drawing method to detect the straightness of the guide rail and can be used for long-distance guide rail straightness detection. The method is suitable for the detection process of the straightness of the guide rails of a single or multiple machine tools.

[0006] The purpose of the present invention is achieved through the following technical measures.

[0007] The present invention provides a method for detecting the straightness of a machine tool bed guide rail. The method uses a set of wire drawing tooling, wherein the tooling comprises a fixed end tooling, a movable end tooling, a block, a wire, and a depth micrometer. The fixed end tooling comprises a bracket, a handle push rod, and a roller. The handle push rod passes through a side plate at one end of the bracket, a pin is provided at the end of the handle push rod, a side plate at the other end of the bracket is fixedly connected to a roller bracket, a roller is mounted on the roller bracket, the movable end tooling comprises a connecting part and a clamping part, a nylon rod is laterally arranged on the connecting part, the clamping part comprises two L-shaped plates, one end of the L-shaped plate passes through an adjusting screw, and the other end is fixedly connected to the connecting part, and the clamping part is used to clamp the depth micrometer.

[0008] The above-mentioned machine tool bed guide rail straightness detection method comprises the following steps:

[0009] (1) Fix the linear rail sliders at the head and foot of the machine bed with blocks, set up the bracket of the fixed end tooling on the slider, adjust the handle push rod to make the fixed end tooling clamp the slider, thereby determining the two end fixing points of the steel wire;

[0010] (2) Check and adjust the distance between the two ends of the steel wire and the guide surface of the slider to make them equal, ensure that the two ends are aligned to zero, wrap the steel wire around the rollers of the two fixed end fixtures and straighten it, then install the depth micrometer on the movable end fixture, and use the end face of the movable end fixture, that is, the end of the nylon rod, to press against the guide surface of the slider at the head and foot of the bed respectively, while the micrometer head lightly touches the steel wire, fine-tune the steel wire to make the micrometer readings at the two ends consistent, and record the data;

[0011] (3) Segmented inspection: record the micrometer readings at various locations on the bed. Move the slider in the middle of the bed from the head to the foot of the bed, stop moving at certain intervals, and place the end face of the moving tooling against the side guide surface of the slider. Using the steel wire as a reference, adjust the micrometer so that the micrometer head lightly touches the steel wire, and record the micrometer readings.

[0012] (4) Arrange the data of each point and calculate the straightness of the guide rail.

[0013] In the above technical solution, the method for calculating the straightness of the guide rail in step (4) is specifically as follows: record the micrometer readings at the head and foot of the bed as a, record the readings of various parts of the bed body by segmented detection as b, calculate the relative value data of various parts of the bed body through ba, find the maximum and minimum values ​​in the relative value data, subtract the minimum value from the maximum value, and then the straightness of the guide rail can be calculated.

[0014] The machine tool bed guide rail straightness detection method of the present invention utilizes the wire drawing method to detect the guide rail straightness, is easy to operate, can be used for long-distance guide rail straightness detection, is suitable for the detection process of the guide rail straightness of a single or multiple machine tool beds, and can greatly reduce cost investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a top view of the wire drawing tool of the present invention.

[0016] Figure 2 This is the installation diagram of the tooling at one end of the machine tool.

[0017] Figure 3 This is the installation diagram of the tooling at the other end of the machine tool.

[0018] Figure 4 This is the installation drawing of the tooling for the middle section of the bed.

[0019] Figure 5 It is an exploded view of the fixed end tooling bracket in the present invention.

[0020] Figure 6 It is an exploded view of the fixed end tooling handle push rod in the present invention.

[0021] Figure 7 It is an overall schematic diagram of the fixed end tooling in the present invention.

[0022] Figure 8It is an overall schematic diagram of the mobile terminal tooling in the present invention.

[0023] Fig. 9 It is a schematic diagram of the stopper in the present invention.

[0024] Among them: 1. Fixed end tooling, 2. Moving end tooling, 3. Block, 4. Steel wire, 5. Slider, 6. Linear rail, 7. Depth micrometer, 11. Bracket, 12. Handle push rod, 13. Roller, 14. Nut, 15. Set screw, 21. Connecting part, 22. Clamping part, 23. Nylon rod, 24. Knurled screw. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation cases. It should be understood that the specific implementation cases described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] This embodiment provides a method for detecting the straightness of a machine tool bed rail. The method uses a set of wire drawing tooling, such as Figure 1 As shown, the tooling includes a fixed end tooling 1, a movable end tooling 2, a stopper 3, a steel wire 4, and a depth micrometer 7. Figures 2 to 9 As shown, the fixed end tooling 1 includes a bracket 11, a handle push rod 12, and a roller 13. The handle push rod 12 passes through the side plate at one end of the bracket 11, and a pin is provided at the end of the handle push rod 12. The side plate at the other end of the bracket 11 is fixedly connected to the roller bracket, and the roller 13 is mounted on the roller bracket. The mobile end tooling 2 includes a connecting portion 21 and a clamping portion 22. A nylon rod 23 is laterally arranged on the connecting portion 21, and the clamping portion 22 includes two L-shaped plates. One end of the L-shaped plate passes through a knurled screw 24, and the other end is fixedly connected to the connecting portion 21 by a cross screw and a washer. The clamping portion 22 is used to clamp the depth micrometer 7.

[0027] In order to ensure that the tooling can be used efficiently and conveniently, the precision error of individual parts is strictly controlled during the production process, and there are also strict requirements for the coordination between different parts. There are requirements for the parallelism, verticality, coaxiality, roughness, etc. of the parts.

[0028] The method for detecting the straightness of a machine tool bed guide rail in this embodiment comprises the following steps:

[0029] (1) Fix the linear rail sliders 5 at the head and foot of the machine bed with the block 3, set the bracket of the fixed end tooling 1 on the slider 5, adjust the handle push rod 12 so that the fixed end tooling 1 clamps the slider 5, thereby determining the two end fixing points of the steel wire 4;

[0030] (2) Check and adjust the distance between the two ends of the steel wire and the side guide surface of the slider to make them equal, ensure that the two ends are aligned to zero, wrap the steel wire 4 around the rollers 13 of the two fixed end fixtures 1 and straighten it, then install the depth micrometer 7 on the movable end fixture 2, and use the end face of the movable end fixture, that is, the end of the nylon rod 23, to press against the side guide surface of the slider 5 at the head and foot of the bed respectively, and at the same time, lightly touch the steel wire 4 with the micrometer head, and fine-tune the steel wire 4 to make the micrometer readings at the two ends consistent, and record the data;

[0031] (3) Segmented inspection and recording of micrometer readings at various locations on the bed. Move the slider 5 in the middle of the bed from the head to the foot of the bed, stop moving at certain intervals, and place the end face of the moving end tooling 2 close to the side guide surface of the slider 5. Using the steel wire 4 as a reference, adjust the micrometer so that the micrometer head lightly touches the steel wire, and record the micrometer readings.

[0032] (4) Arrange the data of each point and calculate the straightness of the guide rail. Specifically: record the micrometer readings at the head and foot of the bed as a, and record the readings of each part of the bed body as b. Calculate the relative value data of each part of the bed body through ba, find the maximum and minimum values ​​in the relative value data, and subtract the minimum value from the maximum value to calculate the straightness of the guide rail. For example, the data at the head and foot of the bed is 30.15mm, and the data at each part of the bed body are 30.16mm, 30.17mm, 30.16mm, 30.14mm, 30.13mm, 30.15mm, 30.16mm, 30.15mm, then the relative value data are 0.01mm, 0.02mm, 0.01mm, -0.01mm, -0.02mm, 0mm, 0.01mm, 0mm. The maximum and minimum values ​​in the relative value data are 0.02 mm and -0.02 mm, respectively. Therefore, the guide rail straightness is 0.02-(-0.02)=0.04 mm.

[0033] The wire drawing tool and detection method in the present invention can solve the problem of straightness detection of machine tool bed rails (especially long-distance rails). A large-scale intelligent machining production line is 130 meters long, and its assembly process involves the overall straightness detection of the bed rails of 5 machine tools on a single line. This technology has been successfully applied to this project.

[0034] The method of the present invention can be applied not only to the straightness detection of the linear guide rails of machine tool beds, but also to the straightness detection of hydrostatic guide rails. In addition, the method can also be applied to projects involving the straightness detection of long-distance guide rails in other industries.

[0035] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0036] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting the straightness of a machine tool bed guide rail, characterized in that: The method uses a set of wire drawing tooling, which includes a fixed end tooling, a movable end tooling, a block, a steel wire, and a depth micrometer. The fixed end tooling includes a bracket, a handle push rod, and a roller. The handle push rod passes through a side plate at one end of the bracket, and a pin is provided at the end of the handle push rod. The side plate at the other end of the bracket is fixedly connected to the roller bracket, and a roller is mounted on the roller bracket. The movable end tooling includes a connecting part and a clamping part. A nylon rod is laterally arranged on the connecting part. The clamping part includes two L-shaped plates. One end of the L-shaped plate passes through an adjusting screw, and the other end is fixedly connected to the connecting part. The clamping part is used to clamp the depth micrometer. The machine tool bed guide rail straightness detection method comprises the following steps: (1) Fix the linear rail sliders at the head and foot of the machine bed with blocks, set up the bracket of the fixed end tooling on the slider, adjust the handle push rod to make the fixed end tooling clamp the slider, thereby determining the two end fixing points of the steel wire; (2) Check and adjust the distance between the two ends of the steel wire and the guide surface of the slider to make them equal, ensure that the two ends are aligned to zero, wrap the steel wire around the rollers of the two fixed end fixtures and straighten it, then install the depth micrometer on the movable end fixture, and use the end face of the movable end fixture, that is, the end of the nylon rod, to press against the guide surface of the slider at the head and foot of the bed respectively, while the micrometer head lightly touches the steel wire, fine-tune the steel wire to make the micrometer readings at the two ends consistent, and record the data; (3) Segmented inspection: record the micrometer readings at various locations on the bed. Move the slider in the middle of the bed from the head to the foot of the bed, stop moving at certain intervals, and place the end face of the moving tooling against the side guide surface of the slider. Using the steel wire as a reference, adjust the micrometer so that the micrometer head lightly touches the steel wire, and record the micrometer readings. (4) Arrange the data of each point and calculate the straightness of the guide rail.

2. The machine tool bed guide rail straightness detection method according to claim 1, characterized in that The method for calculating the straightness of the guide rail in step (4) is specifically as follows: record the micrometer readings at the head and foot of the bed as a, record the readings of various parts of the bed body in segmented detection as b, calculate the relative value data of various parts of the bed body through ba, find the maximum and minimum values ​​in the relative value data, subtract the minimum value from the maximum value, and then the straightness of the guide rail can be calculated.

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