Guide rail stress detection device

Abstract

The utility model discloses a guide rail stress detection device, which comprises a working table, a high-precision measuring flat plate is arranged on the working table, a baffle is arranged on one side of the working table, and a movable clamping baffle is arranged on the other side of the working table; a measuring platform is further arranged on the side of the baffle, and a movable dial indicator is installed on the measuring platform. According to the rapid guide rail stress detection device, the to-be-detected guide rail is cut, parameters are measured, detection data of the to-be-detected sample are obtained in a bisection segmentation mode, the residual stress condition of the guide rail can be rapidly detected, meanwhile, the internal residual stress of the guide rail is shown in a specific numerical value mode, and the detection accuracy is improved. The method is more visual and easier to compare; the whole process is convenient and fast, investment of some special equipment is not needed, great practical value is achieved for a production field, and more cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to technology guide rail stress technical field especially relates to a guide rail stress detection device. BACKGROUND

[0002] Linear guide rail as a kind of long axle class parts, in the process of heat treatment, due to the material inherent organization changes and under the action of external force can lead to guide rail internal stress sharply increase, in turn make guide rail product bend deformation cause the loss of part accuracy.To solve the problem of linear guide rail bending, usually use straightening way to correct, but due to the existence of guide rail internal residual stress makes that straightening rebound is serious, greatly influence product quality.

[0003] Stress relief process in heat treatment procedure can effectively promote the release of guide rail internal residual stress, by heating workpiece to AC1 below certain temperature after heat preservation and slow cooling, make grain homogenization, grain boundary interface energy changes from metastable state to the lowest energy balance state, eliminate the influence of internal stress.Therefore, usually, need to carry out stress relief procedure to guide rail before finishing, but whether the parameters of the process itself are reasonable and the execution situation greatly influence the result of residual stress elimination, for this reason, a kind of convenient, fast, low investment and wide application range detection means is continued, to detect and identify the residual stress condition of guide rail product itself before finishing.

[0004] Internal stress as a kind of inherent state of material, it is difficult to detect by naked eye observation and other intuitive means.At present, the commonly used internal stress detection means mainly includes semi-destructive detection method: small hole method, indentation method, non-destructive detection method: X-ray diffraction method, neutron diffraction method, magnetic measurement method, ultrasonic detection method, although there are many detection methods, but there are some limitations in use, such as small hole method detection result is easily affected by human factors (drilling speed, strain gauge adhesion degree etc.), indentation method is greatly affected by the surface state of the detected surface and cannot detect the residual stress distribution inside the material, X-ray diffraction method and neutron diffraction method equipment cost is expensive and not portable, it is difficult to realize engineering field application, magnetic measurement method is easily disturbed by surrounding magnetic field environment and can only detect magnetic materials, ultrasonic detection needs to prepare stress-free standard block in advance and calibrate acoustic elastic coefficient, the preparation time is long, it is difficult to meet the detection requirements of linear guide rail processing enterprises with less investment and high efficiency. UTILITY MODEL CONTENTS

[0005] In view of the above defects or deficiencies, the purpose of the utility model is to provide a guide rail stress detection device.

[0006] In order to achieve the above purpose, the technical scheme of the utility model is:

[0007] A guide rail stress detection device, comprising: a workbench, a high-precision measuring plate is arranged on the workbench, a baffle is arranged on one side of the workbench, and a movable clamping baffle is arranged on the other side; a measuring platform is further arranged on the baffle side, and a movable dial gauge is installed on the measuring platform.

[0008] A sliding rail is arranged on the measuring platform, a sliding block is slidably installed on the sliding rail, an adjustable mounting bracket is installed on the sliding block, and a dial gauge is installed on the mounting bracket.

[0009] The mounting bracket comprises a first mounting arm, a second mounting arm is connected and installed on the first mounting arm, and a locking nut is arranged at the connection position of the first mounting arm and the second mounting arm.

[0010] The mounting bracket is a universal dial gauge stand installed with the sliding block, and the dial gauge is installed on the universal dial gauge stand.

[0011] The universal dial gauge stand is a magnetic dial gauge stand.

[0012] A lead screw is arranged at the back of the clamping baffle, and a nut matched with the lead screw is arranged on the side of the workbench.

[0013] Compared with the prior art, the beneficial effects of the guide rail stress detection device are as follows:

[0014] The guide rail stress detection device provided by the utility model can quickly detect the residual stress condition of the guide rail by cutting the guide rail to be detected and measuring the parameters, and can intuitively and easily compare the residual stress in the guide rail in the form of specific numerical values. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a guide rail stress detection device structural schematic view of the utility model;

[0016] Figure 2 is a guide rail stress detection device structural schematic view of the utility model;

[0017] Figure 3 is a ball guide rail section cutting method schematic view of the utility model;

[0018] Figure 4 is a ball guide rail section cutting side view of the utility model. DETAILED DESCRIPTION

[0019] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0020] like Figure 1 , Figure 2 As shown, this utility model provides a guide rail stress detection device, including: a workbench 1, a high-precision measuring plate 2 is provided on the workbench 1, a baffle 3 is provided on one side of the workbench 1, and a movable clamping baffle 4 is provided on the other side; a measuring platform 10 is also provided on the side of the baffle 3, and a movable dial indicator 8 is installed on the measuring platform 10.

[0021] The measuring platform 10 is provided with a sliding rail 5, a slider 6 is slidably mounted on the sliding rail 5, an adjustable mounting bracket 7 is mounted on the slider 6, and a dial indicator 8 is mounted on the mounting bracket 7.

[0022] Specifically, the mounting bracket 7 includes a first mounting arm 71, on which a second mounting arm 72 is mounted. A locking nut is provided at the connection between the first mounting arm 71 and the second mounting arm 72. This allows the mounting bracket 7 to be locked, facilitating the dial indicator 8 for testing.

[0023] Furthermore, the mounting bracket 7 is a universal gauge holder 9 that is mounted on the slider 6, and the dial indicator 8 is mounted on the universal gauge holder 9. The universal gauge holder 9 is a magnetic holder, which allows direct adjustment of the position of the dial indicator 8, facilitating the measurement of parameters at different positions.

[0024] For example, in this utility model, the clamping baffle 4 can be connected by a lead screw 41 installed on the back of the clamping baffle 4, and a nut that cooperates with the lead screw 41 is provided on the side of the workbench 1.

[0025] The working process of this utility model is as follows:

[0026] like Figure 3 , 4 As shown, a guide rail sample to be tested is selected and obtained by CNC wire cutting. The sample is then measured to obtain its upper width, lower width, and straightness. The specific steps of obtaining the guide rail sample by CNC wire cutting include:

[0027] Cut a 600mm long section of the guide rail from the end of the entire guide rail using a circular saw;

[0028] The 100mm long discarded from the two ends of the guide rail segment is removed by using a numerical control wire cutting machine tool, and the remaining 400mm long guide rail segment is obtained as the to-be-measured guide rail sample.

[0029] In the utility model, the to-be-measured guide rail sample can be selected in multiple ways.

[0030] The first kind is:

[0031] Two to-be-measured guide rail samples are selected, one of which is a drawn profile after a heat treatment process to remove residual stress, and the other one is not processed to keep the initial state of the drawn profile, so that the stress parameters of the two to-be-measured guide rail samples are compared finally.

[0032] The second kind is:

[0033] The stress-removed guide rail sample is selected, and a 6-meter pit furnace is used to remove stress from a 4-meter long guide rail, the stress removal temperature is 550 DEG C, and the holding time is 300 min, and then the to-be-measured guide rail sample is obtained, so that the upper width, the lower width and the straightness change between the uncut section and the cut section of the same guide rail are compared finally.

[0034] In the specific implementation process, the sample can be selected according to the actual measurement parameters, and the parameters of the control sample and the actual measurement sample can be obtained.

[0035] Further, the to-be-measured guide rail sample is measured to obtain the upper width, the lower width and the straightness, which specifically includes:

[0036] The 400mm long guide rail segment is measured on a high-precision measuring plate, and the upper width, the lower width and the straightness are measured by using a dial indicator.

[0037] Then, the to-be-measured guide rail sample is further divided, so that the to-be-measured guide rail sample is cut in half from the middle part, and the test sample and the control sample are obtained, and the test sample is cut in half along the axial direction, and the test sample cut into two halves is folded.

[0038] In the utility model, the 400mm long guide rail segment is cut in half from the middle part along one end by using a numerical control wire cutting machine tool, and the cutting length is about 200mm, and then the guide rail is cut along the radial direction. The disc saw cutting machine is used to cut the guide rail, which is an existing tool in the production site, and does not need to be additionally placed for processing and detection, and the disc saw cutting machine has high cutting efficiency and saves time.

[0039] It should be noted that the cut guide rail has different stress release positions and sequences due to different cutting sequences, the first cutting position is the first stress release position, the cutting seam is obviously more obvious for observation and measurement, and the first cutting seam will be derived along with the operation of the wire cutting molybdenum wire, and the cutting seam will be gradually expanded along with the stress release in the process.

[0040] Finally, the folded test sample is placed on the workbench 1, the position is selected by moving the mounting bracket 7 of the dial gauge 8, and the upper width, lower width, straightness of the folded test sample and the gap width of the folded guide rail are obtained by the dial gauge 8; the upper width and lower width data of the folded guide rail after being cut open and the upper width and lower width data of the guide rail without being cut open, and the guide rail cut gap width are compared to determine the stress condition of the linear guide rail product.

[0041] The measurement of the folded test sample obtains the upper width, lower width, straightness of the folded test sample and the gap width of the folded guide rail, and specifically includes:

[0042] The left and right halves of the guide rail are folded on the high-precision measuring plate, the upper width, lower width and straightness are measured by the dial gauge, and the gap width of the folded guide rail is measured by the feeler gauge.

[0043] Specifically, the comparison of the upper width and lower width data of the folded guide rail after being cut open and the upper width and lower width data of the guide rail without being cut open, and the guide rail cut gap width to determine the stress condition of the linear guide rail product specifically includes:

[0044] The upper width and lower width data of the folded guide rail after being cut open and the guide rail cut gap width are measured;

[0045] The upper width and lower width data of the guide rail without being cut open and the guide rail cut gap width are compared with the upper width and lower width data of the folded guide rail after being cut open and the guide rail cut gap width one by one in sequence;

[0046] When the difference value is less than 0.20mm, the guide rail is a stress-removed guide rail; when the difference value is greater than or equal to 0.20mm, it is a stress-unremoved guide rail, and there is residual stress in the guide rail.

[0047] It is obvious for those skilled in the art that the above specific examples are only preferred schemes of the present application, and therefore, the improvements and changes made by those skilled in the art to some parts of the present application still embody the principles of the present application and achieve the purposes of the present application, and all of them belong to the scope of protection of the present application.

Claims

1. A guide rail stress detection device, characterized in that, Include: Workbench (1), the workbench (1) is provided with high-precision measuring plate (2), one side of the workbench (1) is provided with baffle (3), the other side is provided with movable clamping baffle (4); The side of the baffle (3) is also provided with a measuring platform (10), and the movable dial gauge (8) is installed on the measuring platform (10).

2. The guide rail stress detecting apparatus according to claim 1, characterized by The measuring platform (10) is provided with a sliding rail (5), the sliding rail (5) is slidably installed with a sliding block (6), the sliding block (6) is installed with an adjustable mounting bracket (7), and the mounting bracket (7) is installed with a dial gauge (8).

3. The guide rail stress detecting apparatus according to claim 2, characterized by The mounting bracket (7) comprises a first mounting arm (71), a second mounting arm (72) is installed on the first mounting arm (71), and a locking nut is arranged at the connecting portion of the first mounting arm (71) and the second mounting arm (72).

4. The guide rail stress detecting apparatus according to claim 2, characterized by The mounting bracket (7) is a universal table stand (9) installed with the sliding block (6), and the dial gauge (8) is installed on the universal table stand (9).

5. The guide rail stress detecting apparatus according to claim 4, characterized by The universal table stand (9) is a magnetic table stand.

6. The guide rail stress detecting apparatus according to claim 1, wherein The screw rod (41) is arranged on the back of the clamping baffle (4), and a nut matched with the screw rod is arranged on the side of the workbench (1).

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