Concentricity detection mechanism

Abstract

The utility model relates to the technical field of concentricity detection, in particular to a concentricity detection mechanism, which comprises a base, a rotating seat arranged on the base and used for being connected with one end of a workpiece to be detected, a measuring mechanism arranged on the base and used for measuring numerical change, and a standard cylindrical block used for being connected with the other end of the workpiece to be detected, the measuring end of the measuring mechanism abuts against the outer side wall of the standard cylindrical block. The concentricity detection device overcomes the defect that an existing concentricity detection device cannot be suitable for a non-cylindrical workpiece positioned by a round hole. According to the utility model, the constraint condition that only the concentricity of a cylindrical object can be detected traditionally is broken through, rapid concentricity detection of a non-cylindrical workpiece positioned by a circular hole is realized, and the device has general applicability, can be applied to concentricity detection of workpieces of various shapes and specifications, and can rapidly determine whether the concentricity of the workpiece meets the use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of concentricity detection, in particular to a concentricity detection mechanism. Background Art

[0002] Since automotive sheet metal parts are numerous and complex, we usually design special automotive sheet metal inspection fixtures to inspect them, including the size, thickness or other technical parameters of sheet metal parts. The universal support part of the flexible inspection bracket for stamped sheet metal parts is mainly used to connect the flexible inspection substrate and the special inspection head. Due to long-term repeated plugging and unplugging, the universal support has continuous wear on the positioning clamping hole, which makes the installation position of the universal support on the flexible inspection substrate prone to deviation, which will affect the inspection accuracy of sheet metal parts. Therefore, it is necessary to regularly inspect and calibrate the concentricity of the universal support.

[0003] If three-coordinate or optical scanning is used to detect and calibrate the concentricity of the universal support, the detection efficiency is very low, and it is not convenient for rapid batch detection in a factory environment. For the problem of concentricity detection, the prior art already has a detection method of using a table-type universal length measuring tool to rotate and measure the outer circumference of the workpiece to be measured, and observing the outer circumference concentricity of the workpiece to be measured by the numerical change of the table-type universal length measuring tool. For example, a Chinese patent document discloses a concentricity detection device, including a movable turntable, a fixed turntable, a bearing, and a dial indicator. The bearing is located between the movable turntable and the fixed turntable, and the movable turntable is movably connected to the fixed turntable through the bearing. The contact of the dial indicator is arranged along the radial direction of the workpiece to be inspected, and the end of the contact contacts the side wall of the workpiece to be inspected. By observing the reading of the dial indicator, it is possible to intuitively and accurately judge whether the circumferential concentricity of the workpiece to be inspected is qualified.

[0004] However, for cubic workpieces such as universal supports that are positioned by circular holes, the existing concentricity detection devices cannot be directly applied to concentricity detection of cubic workpieces such as universal supports that are positioned by circular holes. Many universal support workpieces do not have regular cylindrical external shapes, and universal support workpieces are mostly connected and fixed using positioning circular holes on the end faces. The existing concentricity detection devices cannot be well applied to them. Therefore, it is necessary to study and design a concentricity detection mechanism that can detect non-cylindrical workpieces positioned by circular holes. Utility Model Content

[0005] The utility model solves the problem that the current concentricity detection device cannot be applied to non-cylindrical workpieces positioned by circular holes, and provides a concentricity detection mechanism. The utility model breaks through the traditional constraint that only the concentricity of cylindrical objects can be detected, and realizes the rapid detection of the concentricity of non-cylindrical workpieces positioned by circular holes. It has universal applicability and can be applied to the concentricity detection of workpieces of various shapes and specifications, and quickly determines whether the concentricity of the workpiece meets the use requirements.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A concentricity detection mechanism includes a base, a rotating seat arranged on the base for connecting one end of a workpiece to be measured, and a measuring mechanism arranged on the base and used to measure numerical changes. It also includes a standard cylindrical block for connecting the other end of the workpiece to be measured, and the measuring end of the measuring mechanism abuts against the outer wall of the standard cylindrical block.

[0008] It should be noted that the utility model adds a standard cylindrical block as a measurement reference. When in use, the workpiece to be measured is coaxially fixed between the standard cylindrical block and the rotating seat. If the positioning circular hole of the workpiece to be measured is worn, when the rotating seat rotates, the measuring mechanism will detect the position deviation of the outer wall of the standard cylindrical block. By observing the value of the measuring mechanism, it is compared with the preset deviation value. If the value of the measuring mechanism is within the deviation value range, the concentricity of the workpiece to be measured meets the use requirements. If the value of the measuring mechanism exceeds the deviation value range, the concentricity of the workpiece to be measured is not good and is judged to be unqualified. The utility model can quickly detect the concentricity of non-cylindrical workpieces of different height specifications positioned by circular holes, and solves the problem that the concentricity of non-cylindrical workpieces with high installation position accuracy requirements cannot be quickly detected. The utility model adds a standard cylindrical block as a measurement reference, which has universal applicability and can be used in the concentricity detection of items of various shapes and specifications. It has a simple structure, reliable performance, strong practicality, meets universal design requirements, and is easy to maintain, effectively reducing the later use cost.

[0009] It should also be noted that a base and a rotating seat that meet the requirements can be made according to the bottom surface size of the workpiece to be measured, and a matching standard cylindrical block can be made according to the end surface size of the workpiece to be measured and the actual requirements of the positioning circular hole. The size and processing accuracy requirements of the standard cylindrical block can be modified according to actual needs; the flatness requirement of the base should be ≤0.01mm / m, so as to ensure that the flatness of the rotating seat meets the requirements after installation.

[0010] Furthermore, the measuring mechanism includes a support column with one end fixed on the base, a transfer block detachably connected to the support column, and a table-type universal length measuring device fixed on the transfer block.

[0011] Furthermore, the support column and the adapter block are detachably connected via magnetic force.

[0012] It should be noted that the support column can be installed on the base by welding. There are no special requirements for the straightness and shape of the support column itself, and there are no special requirements for its verticality after welding on the base. It only serves to install the adapter block. The height of the support column is made according to the height of the workpiece to be measured to meet the measurement requirements of the universal length measuring instrument.

[0013] Furthermore, the adapter block is a magnetic block. The support column and the adapter block are connected by magnetic force. When the adapter block is a magnetic block, the support column is made of a material that can be magnetically attracted or has magnetic force. The height adjustment of the table-type universal length measuring instrument is achieved by adjusting the adsorption position of the adapter block on the support column.

[0014] Furthermore, the table-type universal length measuring device is a dial gauge or a micrometer. The concentricity deviation is determined by observing the change in the reading of the dial gauge or the micrometer, and the dial gauge or the micrometer is reasonably selected according to different deviation value ranges set for different workpieces.

[0015] Furthermore, the table-type universal length measuring device is fixed on the adapter block by means of buckles, rolled bands or adhesive bonding.

[0016] Furthermore, the rotating seat includes a roller bearing with an outer ring fixed on the base, a support mounting seat connected to the inner ring of the roller bearing, and a first connecting block arranged on the support mounting seat and used for detachably inserting into the end face positioning circular hole of the workpiece to be measured.

[0017] Furthermore, the first connecting block includes a plurality of rivets or positioning pins which are positioned opposite to the end surface positioning circular holes of the workpiece to be measured.

[0018] Furthermore, the standard cylindrical block comprises a standard cylindrical body and a second connecting block which is arranged on the standard cylindrical body and is used for being detachably inserted into the end face positioning circular hole of the workpiece to be measured.

[0019] Furthermore, the second connecting block includes a plurality of rivets or positioning pins which are positioned opposite to the end surface positioning circular holes of the workpiece to be measured.

[0020] It should be noted that if the shape of the workpiece to be measured is different or it is an irregular workpiece, matching rivets or locating pins can be made according to the actual requirements of the bottom mounting surface size and the positioning circular hole of the workpiece to be measured. The structure of the rivet or locating pin is not limited as long as it meets the fixing requirements. Only the size and processing accuracy requirements need to be modified according to actual needs.

[0021] Beneficial effects of the utility model:

[0022] (1) The utility model adds a standard cylindrical block as a measurement reference, and coaxially fixes the workpiece to be measured between the standard cylindrical block and the rotating seat. If the positioning circular hole of the workpiece to be measured is worn, when the rotating seat rotates, the measuring mechanism will detect the position deviation of the outer wall of the standard cylindrical block. By observing the value of the measuring mechanism and comparing it with the preset deviation value, if the value of the measuring mechanism is within the deviation value range, the concentricity of the workpiece to be measured meets the use requirements. If the value of the measuring mechanism exceeds the deviation value range, the concentricity of the workpiece to be measured is poor and is judged to be unqualified.

[0023] (2) The utility model can quickly detect the concentricity of non-cylindrical workpieces of different height specifications positioned by circular holes, thereby solving the problem that the concentricity of non-cylindrical workpieces with high requirements for installation position accuracy cannot be quickly detected. The utility model adds a standard cylindrical block as a measurement reference, which has universal applicability and can be used in the concentricity detection of objects of various shapes and specifications. It has a simple structure, reliable performance, strong practicality, meets universal design requirements, and is easy to maintain, effectively reducing the subsequent use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the support mounting seat and the first connecting block in the utility model;

[0026] Figure 3 It is a schematic diagram of the structure of the workpiece to be tested in the utility model;

[0027] Figure 4 It is a structural schematic diagram of the standard cylindrical block in the utility model. DETAILED DESCRIPTION

[0028] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0030] like Figure 1 and Figure 3 As shown, this embodiment proposes a concentricity detection mechanism, including a base 1, a rotating base 2 arranged on the base 1 for connecting one end of a workpiece 100 to be measured, and a measuring mechanism 3 arranged on the base 1 and used to measure numerical changes, and also includes a standard cylindrical block 4 for connecting the other end of the workpiece 100 to be measured, and the measuring end of the measuring mechanism 3 abuts against the outer wall of the standard cylindrical block 4.

[0031] In this embodiment, two ends of the workpiece 100 to be measured are coaxially connected to the standard cylindrical block 4 and the rotating seat 2 respectively, and the measuring end of the measuring mechanism 3 abuts against the outer wall of the standard cylindrical block 4 during detection.

[0032] like Figure 3 As shown, this embodiment is applied to the concentricity detection of the universal support of the flexible detection bracket for stamping sheet metal parts. The universal support of the flexible detection bracket for stamping sheet metal parts of the workpiece 100 to be tested is manufactured according to the bottom surface size of the workpiece 100 to be tested, and the base 1 and the rotating seat 2 that meet the requirements are manufactured. According to the end face size of the workpiece 100 to be tested and the actual requirements of the universal support end face positioning circular hole, a matching standard cylindrical block 4 is manufactured.

[0033] In this embodiment, the flatness of the base 1 is ≤0.01 mm / m, so as to ensure that the flatness of the rotating base 2 after installation meets the requirements and the measurement accuracy is guaranteed.

[0034] like Figure 1 As shown, the measuring mechanism 3 includes a support column 31 with one end fixed on the base 1 , an adapter block 32 detachably connected to the support column 31 , and a table-type universal length measuring device 33 fixed on the adapter block 32 .

[0035] Specifically, in this embodiment, the support column 31 and the adapter block 32 are detachably connected via magnetic force.

[0036] Specifically, in this embodiment, the support column 31 is installed on the base 1 by welding. The support column 31 is a rectangular column and is vertically welded on the base 1. The height of the support column 31 is greater than the height of the workpiece 100 to be measured. The support column 31 serves to install the adapter block 32 and meets the measurement requirements of the universal length measuring device 33.

[0037] Specifically, in this embodiment, the adapter block 32 is a magnetic block. The support column 31 is made of a material that can be magnetically attracted or has magnetic force. The height adjustment of the table-type universal length measuring device 33 is achieved by adjusting the adsorption position of the adapter block 32 on the support column 31.

[0038] Specifically, in this embodiment, the universal length measuring device 33 is a dial gauge or a micrometer. The concentricity deviation is determined by observing the change in the reading of the dial gauge or the micrometer, and the dial gauge or the micrometer is reasonably selected according to the different deviation value ranges set for different workpieces.

[0039] In this embodiment, the table-type universal length measuring device 33 is fixed on the adapter block 32 by snapping, rolling or gluing.

[0040] like Figure 1 As shown, in this embodiment, the adapter block 32 and the table-type universal length measuring device 33 can be provided in two groups, one for backup and one for use, and one group can be used for data retest and backup replacement to improve the accuracy and reliability of the device.

[0041] like Figure 1 and Figure 2 As shown, the rotating seat 2 includes a roller bearing 21 with an outer ring fixed on the base 1, a support mounting seat 22 connected to the inner ring of the roller bearing 21, and a first connecting block 23 arranged on the support mounting seat 22 and used for detachably inserting into the end face positioning circular hole of the workpiece 100 to be measured.

[0042] Specifically, the first connection block 23 includes four pull pins corresponding to the end surface positioning circular holes of the workpiece 100 to be measured.

[0043] Specifically, the first connection block 23 may also be four positioning pins corresponding to the end surface positioning circular holes of the workpiece 100 to be measured.

[0044] like Figure 4 As shown, the standard cylindrical block 4 includes a standard cylindrical body 41 and a second connecting block 42 which is disposed on the standard cylindrical body 41 and is used for being detachably inserted into the end surface positioning circular hole of the workpiece 100 to be measured.

[0045] Specifically, the second connection block 42 includes two pull pins which are positioned opposite to the end surface positioning circular holes of the workpiece 100 to be measured.

[0046] Specifically, the second connection block 42 includes two positioning pins corresponding to the end surface positioning circular holes of the workpiece 100 to be measured.

[0047] It should be noted that if the shape of the workpiece 100 to be measured is different or it is an irregular workpiece, a matching rivet or locating pin can be made according to the actual requirements of the bottom mounting surface size and the positioning circular hole of the workpiece 100 to be measured. The structure of the rivet or locating pin is not limited as long as it meets the fixing requirements. It only needs to modify the size and processing accuracy requirements according to actual needs.

[0048] The advantage of this embodiment is that, by adding a standard cylindrical block 4 as a measurement reference, when in use, the workpiece 100 to be measured is coaxially fixed between the standard cylindrical block 4 and the rotating seat 2. If the positioning circular hole of the workpiece 100 to be measured is worn, then when the rotating seat 2 rotates, the measuring mechanism 3 will detect the position deviation of the outer wall of the standard cylindrical block 4, and the value of the measuring mechanism 3 is observed and compared with the preset deviation value. If the value of the measuring mechanism 3 is within the deviation value range, the concentricity of the workpiece 100 to be measured meets the use requirements. If the value of the measuring mechanism 3 exceeds the deviation value range, the concentricity of the workpiece 100 to be measured is poor and is judged to be unqualified. This embodiment can quickly detect the concentricity of non-cylindrical workpieces with different height specifications positioned by circular holes, which solves the problem that the concentricity of non-cylindrical workpieces with high requirements for installation position accuracy cannot be quickly detected. A standard cylindrical block 4 is added as a measurement reference, which has universal applicability and can be used in concentricity detection of items of various shapes and specifications. It has a simple structure, reliable performance, strong practicality, meets universal design requirements, and is easy to maintain, effectively reducing the later use cost.

[0049] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A concentricity detection mechanism, comprising a base (1), a rotating base (2) arranged on the base (1) for connecting one end of a workpiece (100) to be measured, and a measuring mechanism (3) arranged on the base (1) for measuring a value change, characterized in that: It also comprises a standard cylindrical block (4) for connecting the other end of the workpiece (100) to be measured, and the measuring end of the measuring mechanism (3) abuts against the outer side wall of the standard cylindrical block (4).

2. A concentricity detection mechanism according to claim 1, characterized in that: The measuring mechanism (3) comprises a support column (31) with one end fixed on the base (1), a transfer block (32) detachably connected to the support column (31), and a table-type universal length measuring device (33) fixed on the transfer block (32).

3. A concentricity detection mechanism according to claim 2, characterized in that: The support column (31) and the adapter block (32) are detachably connected via magnetic force.

4. A concentricity detection mechanism according to claim 3, characterized in that: The adapter block (32) is a magnetic block.

5. A concentricity detection mechanism according to claim 2, characterized in that: The tabular universal length measuring device (33) is a dial gauge or a micrometer.

6. A concentricity detection mechanism according to claim 2, characterized in that: The table-type universal length measuring device (33) is fixed on the adapter block (32) by means of buckles, rolled strips or adhesive bonding.

7. A concentricity detection mechanism according to claim 1, characterized in that: The rotating seat (2) comprises a roller bearing (21) whose outer ring is fixed on the base (1), a support mounting seat (22) connected to the inner ring of the roller bearing (21), and a first connecting block (23) provided on the support mounting seat (22) and used for detachably inserting into the end face positioning circular hole of the workpiece (100) to be measured.

8. A concentricity detection mechanism according to claim 7, characterized in that: The first connection block (23) comprises a plurality of rivets or positioning pins which are positioned relative to the end surface positioning circular holes of the workpiece (100) to be measured.

9. A concentricity detection mechanism according to claim 1, characterized in that: The standard cylindrical block (4) comprises a standard cylindrical body (41) and a second connecting block (42) which is arranged on the standard cylindrical body (41) and is used for being detachably inserted into the end surface positioning circular hole of the workpiece (100) to be measured.

10. A concentricity detection mechanism according to claim 9, characterized in that: The second connection block (42) comprises a plurality of rivets or positioning pins which are positioned relative to the end surface positioning circular holes of the workpiece (100) to be measured.

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