Flatness testing fixture

Abstract

The utility model relates to a flatness testing fixture which comprises a measuring platform. The positioning mechanism is arranged on the measuring platform and is used for positioning a to-be-measured workpiece, so that a preset plane height is kept between the to-be-measured workpiece and the measuring platform; the pressing assembly is also arranged on the measuring platform and is used for pressing the workpiece to be measured; the device is characterized in that the device also comprises a detection member, the detection member comprises a measurement part which is parallel to the measurement platform and is used as a reference surface, a base part which moves along the measurement platform, and a connection part which connects the measurement part and the base part, and the measurement part is provided with at least two parallel measurement surfaces which are attached to a to-be-measured surface of a to-be-measured workpiece. And when the to-be-measured surface can be attached to any measuring surface, the flatness of the to-be-measured surface of the to-be-measured workpiece meets the requirement. The utility model has the advantages that the whole measuring process is time-saving and labor-saving, the efficiency is high, the precision is high, and even if the thickness of the surface to be measured is thinner and the width is narrower, the surface to be measured cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the field of detection, in particular to a flatness detection tool. Background Art

[0002] A gauge is a special inspection device used to measure and evaluate the quality of the size, shape, and position characteristics of parts. For example, the utility model patent "New Side Enclosure Inspection Fixture" with patent number ZL201220286990.6 (authorization announcement number CN202734699U) discloses a gauge, which uses the corresponding positioning and mounting holes on the bottom plate to fix the clamping device and the movable card assembly with pin hole positioning bolts to form a side enclosure inspection fixture, fix the parts to be inspected on the inspection fixture according to the positioning surface and positioning pins, close the clamping device, and then use micrometers, vernier calipers and other inspection tools for inspection.

[0003] This type of gauge is usually suitable for measuring various dimensional properties of parts, such as length, flatness, etc. For parts of certain shapes, such as Figure 1 As shown, the middle part of its upper surface is sunken to form a groove 1', and the upper surface of the side wall of the groove 1' is the surface 2' to be measured for flatness measurement. This surface 2' to be measured is a circle around the outer circumference of the groove 1', and is relatively thin and narrow. If the above device is used to measure the flatness of the part, the following problems are likely to occur: First, since the surface 2' to be measured is relatively thin, if a micrometer or a vernier caliper is used to clamp or clamp the surface 2' to be measured, it is easy to cause damage to the surface 2' to be measured, thereby affecting the quality of the part; second, the entire measurement process requires manual measurement of multiple detection points of the surface 2' to be measured using a micrometer or a vernier caliper, which is labor-intensive and makes the production efficiency of the measurement method low. In addition, since the measurement accuracy of manual measurement varies from person to person, the measurement accuracy is not high. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a flatness inspection tool which is not easy to damage the surface of the part to be tested, especially for the parts with thinner surface to be tested, in view of the above-mentioned existing technical status.

[0005] The second technical problem to be solved by the utility model is to provide a flatness inspection tool which is stable and avoids the problem of low accuracy caused by manual reading in view of the above-mentioned existing technical status.

[0006] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: the flatness inspection tool comprises a measuring platform;

[0007] A positioning mechanism, disposed on the measuring platform, for positioning the workpiece to be measured so that the workpiece to be measured and the measuring platform maintain a preset plane height; and

[0008] A clamping assembly is also disposed on the measuring platform and is used to clamp the workpiece to be measured;

[0009] The invention is characterized in that: it also includes a detection member, which includes a measuring part parallel to the measuring platform as a reference plane, a base moving along the measuring platform, and a connecting part connecting the measuring part and the base, and the measuring part is provided with at least two parallel measuring surfaces which are in contact with the surface to be measured of the workpiece to be measured, and when the surface to be measured can be in contact with any measuring surface, the flatness of the surface to be measured of the workpiece to be measured meets the requirements.

[0010] To solve the second technical problem, further, the base of the detection member moves along the front-rear direction of the X-axis or Y-axis of the measuring platform, and the connecting portion is extended along the Z-axis direction perpendicular to the measuring platform. Since the detection member can move along the measuring platform on the X-axis or Y-axis to detect the surface of the workpiece to be tested, multiple measuring surfaces can be set according to the different tolerance range requirements of different workpieces to be tested, that is, it can directly detect whether the flatness of the surface to be tested meets the requirements, without the need for manual readings such as micrometer or vernier caliper measurement, and the detection stability is high.

[0011] Furthermore, there are two measuring surfaces and they are arranged adjacent to each other, so that a step is formed between the two measuring surfaces, and the step is the preset maximum flatness deformation value of the workpiece to be measured. The two measuring surfaces are arranged to keep the flatness deformation within the maximum tolerance range, that is, the maximum flatness deformation value, such as ±0.3mm.

[0012] In order to enable the positioning mechanism to position the workpiece to be measured, the positioning mechanism further includes a positioning protrusion matching the groove of the workpiece to be measured and / or a positioning groove matching the protrusion of the workpiece to be measured. The number and setting height of the positioning protrusion and the positioning groove can be selectively combined according to the workpiece to be measured.

[0013] The clamping assembly has a variety of structures. From the perspective of structural simplicity, preferably, the clamping assembly includes a clamping head, each clamping head is connected to its own connecting rod mechanism, and a wrench is connected to the end of the connecting rod mechanism.

[0014] Furthermore, the measuring platform is also provided with a support member, which is located under the clamping head of the clamping assembly and forms a clamping space for clamping the workpiece to be measured between the support member and the clamping head. During assembly, the fulcrum of the support member and the pressure point of the clamping head are kept at a high degree of overlap to avoid crushing the workpiece, especially the thinner workpiece.

[0015] Compared with the prior art, the utility model has the following advantages: 1. The measuring part of the detection piece in the flatness inspection tool is provided with at least two parallel measuring surfaces which are in contact with the surface to be measured of the workpiece to be measured. The base of the detection piece moves along the measuring platform. When the surface to be measured can be in contact with any measuring surface, the flatness of the surface to be measured of the workpiece to be measured meets the requirements. It is only necessary to check whether the measuring surface is in contact with the measuring surface. Even if the surface to be measured is thin and narrow, it will not be damaged, thereby ensuring the quality of the workpiece.

[0016] 2. The flatness gauge uses a test piece instead of a micrometer or a vernier caliper for measurement. The flatness of the surface of the workpiece to be measured is measured within the allowable error range to see whether it meets the requirements, thus avoiding the problem of low accuracy caused by manual reading. The entire measurement process is time-saving, labor-saving, efficient and accurate.

[0017] 3. Due to the positioning mechanism and clamping assembly of the flatness gauge, the entire detection process has a stable and accurate positioning reference, which can ensure maximum repeatability and reproducibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a specific shape part in the background technology of the utility model;

[0019] Figure 2 It is a structural schematic diagram of another angle of a specific shape part in the background technology of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the flatness inspection tool and the workpiece to be inspected in the embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the detection element in the embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the flatness checking tool in the embodiment of the utility model. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] like Figures 3 to 5 The flatness tester of this embodiment comprises a measuring platform 1, a positioning mechanism 3, a clamping assembly 4, a detection member 5, a positioning pin 6, a first support seat 7, a second support seat 8, a profiling block 10 and a support member 11.

[0025] The measuring platform 1 is used to place the workpiece 2 to be measured, the positioning mechanism 3 and the clamping assembly 4 are fixedly arranged on the measuring platform 1, and the detection member 5 is movably arranged on the measuring platform 1. The workpiece 2 to be measured is placed in the middle of the measuring platform 1, and the positioning mechanism 3, the clamping assembly 4, the detection member 5, the profiling block 10 and the supporting member 11 are all located around the workpiece 2 to be measured.

[0026] The positioning mechanism 3 of this embodiment includes a positioning protrusion 31 that matches the groove of the workpiece 2 to be measured and a positioning groove 32 that matches the protrusion of the workpiece 2 to be measured. The positioning protrusion 31 and the positioning groove 32 are arranged on the measuring platform 1 through the first support seat 7, and the first support seat 7 is fixed on the measuring platform 1 through the positioning pin 6. There is one positioning protrusion 31 and one positioning groove 32, which are respectively arranged on both sides of the Y axis of the measuring platform 1. Since the heights of the two sides of the workpiece 2 to be measured on the Y axis are different, in order to position the workpiece 2 to be measured, the heights of the two first support seats 7 are different, so that the workpiece 2 to be measured and the measuring platform 1 maintain a preset plane height. At the same time, in order to further position the workpiece 2 to be measured, two profiling blocks 10 are provided on one side of the X axis of the measuring platform 1, and the profiling blocks 10 have a groove 101 that matches the shape of the workpiece 2 to be measured.

[0027] After the positioning mechanism 3 has positioned the workpiece 2 to be measured, the clamping assembly 4 is required to clamp the workpiece 2 to prevent the workpiece 2 from moving left and right. The clamping assembly 4 of this embodiment includes a clamping head 41, a connecting rod mechanism 42 and a wrench 43. In order to enable the clamping head 41 to be clamped on the workpiece 2 to be measured, a second support seat 8 is provided below the clamping head 41 to increase the height of the clamping head 41 relative to the measuring platform 1. Figure 5 As shown, in this embodiment, there are three clamping heads 41, one of which is arranged on one side of the Y axis of the measuring platform 1, and the other two are arranged on the other side of the Y axis of the measuring platform 1. Each clamping head 41 is connected to its own connecting rod mechanism 42, and a wrench 43 is connected to the end of the connecting rod mechanism 42. The clamping head 41 is moved up or down by rotating the wrench 43 to clamp or release the workpiece 2 to be measured. A support member 11 used in conjunction with each clamping assembly 4 is also provided on the measuring platform 1, and a clamping space for clamping the workpiece 2 to be measured is formed between the support member 11 and the clamping head 41.

[0028] In this embodiment, the detection member 5 includes a measuring portion 51 parallel to the measuring platform 1 as a reference surface, a base 52 moving along the measuring platform 1, and a connecting portion 53 connecting the measuring portion 51 and the base 52. The base 52 of the detection member 5 can move along the front-back direction of the X-axis or Y-axis of the measuring platform 1, and the connecting portion 53 is extended along the Z-axis direction perpendicular to the measuring platform 1. The measuring portion 51 is provided with two parallel measuring surfaces 511 that fit the surface to be measured of the workpiece 2 to be measured, and the measuring surfaces 511 have two and are arranged adjacent to each other, so as to form a step between the two measuring surfaces 511. The difference between the distances between the two measuring surfaces 511 and the surface of the measuring platform 1 is twice the preset maximum flatness deformation value of the workpiece 2 to be measured, that is, 0.6mm. In this way, the tolerance of the deformation of the flatness that can be detected by the detection member 5 is ±0.3mm.

[0029] The detection part 5 is formed by one-piece processing and then quenched to a hardness of HRC 50 or above. This treatment can make the detection part 5 not easy to deform and wear, can be used repeatedly, and is easy to operate, and is convenient and quick for detection personnel to use.

[0030] When using the flatness gauge of this embodiment, refer to Figure 3 If it is necessary to detect four test surfaces of the workpiece 2 (such as points A, B, C, and D), first position the workpiece 2 in the middle of the measuring platform 1 through the positioning mechanism 3, and then clamp the workpiece 2 through the clamping assembly 4. The inspection personnel manually move the inspection piece 5 corresponding to each test surface along the front and rear direction of the X-axis or Y-axis of the measuring platform 1. When the test surface can fit with any measuring surface 511, the flatness of the test surface of the workpiece 2 meets the requirements.

Claims

1. A flatness inspection tool, comprising: Measuring platform (1); A positioning mechanism (3) is provided on the measuring platform (1) and is used to position the workpiece (2) to be measured so that the workpiece (2) to be measured and the measuring platform (1) maintain a preset plane height; and A clamping assembly (4), also disposed on the measuring platform (1), for clamping the workpiece to be measured (2); Features: The invention also comprises a detection member (5), wherein the detection member (5) comprises a measuring portion (51) parallel to the measuring platform (1) as a reference surface, a base portion (52) movable along the measuring platform (1), and a connecting portion (53) connecting the measuring portion (51) and the base portion (52), wherein the measuring portion (51) is provided with at least two parallel measuring surfaces (511) which are in contact with the surface to be measured of the workpiece (2) to be measured, and when the surface to be measured is in contact with any of the measuring surfaces (511), the flatness of the surface to be measured of the workpiece (2) to be measured meets the requirements.

2. The flatness gauge according to claim 1, characterized in that: The base (52) of the detection member (5) moves in the front-rear direction along the X-axis or Y-axis of the measuring platform (1), and the connecting portion (53) is extended along the Z-axis direction perpendicular to the measuring platform (1).

3. The flatness gauge according to claim 2, characterized in that: The measuring surfaces (511) are provided with two surfaces and are arranged adjacent to each other, so that a step is formed between the two measuring surfaces (511), and the step is a preset maximum flatness deformation value of the workpiece (2) to be measured.

4. The flatness gauge according to any one of claims 1 to 3, characterized in that: The positioning mechanism (3) comprises a positioning protrusion (31) matching the groove of the workpiece (2) to be measured and / or a positioning groove (32) matching the protrusion of the workpiece (2) to be measured.

5. The flatness gauge according to claim 4, characterized in that: The clamping assembly (4) comprises a clamping head (41), each clamping head (41) is connected to its own connecting rod mechanism (42), and the end of the connecting rod mechanism (42) is connected to a wrench (43).

6. The flatness gauge according to claim 5, characterized in that: The measuring platform (1) is also provided with a support member (11), which is located below the clamping head (41) of the clamping assembly (4) and forms a clamping space between the support member (11) and the clamping head (41) for clamping the workpiece (2) to be measured.

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