Positioning clamp

Abstract

The utility model relates to the technical field of manufacturing and machining, in particular to a positioning clamp. The positioning clamp comprises a first clamp and a second clamp, the first clamp is provided with a first body part, a plurality of positioning blocks and a plurality of pressing pieces, the first body part is provided with a first positioning groove, the first positioning groove is configured to be a back panel for containing a workpiece, the positioning blocks are arranged at the groove bottom of the first positioning groove, and the positioning blocks are configured to be inserted into the corresponding clamping grooves to position the back panel; the plurality of hold-down pieces are detachably connected to the first body part, and the plurality of hold-down pieces are configured to hold down the front panel so as to fix the front panel; and the second clamp is provided with a second body part and a plurality of positioning pins, the second body part is provided with a second positioning groove, the second positioning groove is configured to accommodate the front panel, and the plurality of positioning pins are arranged in the second positioning groove and are configured to be inserted into the corresponding positioning holes to position the front panel. According to the positioning clamp, the two opposite sides of the workpiece can be positioned respectively, the positioning effect is good, and the workpiece can be machined conveniently.

Description

Technical Field

[0001] This application relates to the field of manufacturing technology, specifically to a positioning fixture. Background Technology

[0002] When machining workpieces, fixtures are typically used to position the raw material or workpiece before machining. When machining irregularly shaped workpieces, especially when the workpiece has two different structures, it is necessary to machine both different structures. Conventional fixtures, after positioning the workpiece, often need to clamp only a portion of the workpiece, which affects the machining of the clamped part. Utility Model Content

[0003] In view of the above, it is necessary to propose a positioning fixture that can position the two opposite parts of a workpiece separately, so as to facilitate the machining of the two opposite parts of the workpiece.

[0004] This application provides a positioning fixture for positioning the front or back panel of a workpiece. The front panel has multiple positioning holes, and the back panel has multiple snap-fit ​​slots. The positioning fixture includes a first fixture, comprising a first body, multiple positioning blocks, and multiple holding members. The first body has a first positioning groove configured to accommodate the back panel of the workpiece. The multiple positioning blocks are disposed at the bottom of the first positioning groove and correspond one-to-one with the multiple snap-fit ​​slots. The positioning blocks are configured to be inserted into the corresponding snap-fit ​​slots to position the back panel. The multiple holding members are detachably connected to the first body. Furthermore, a plurality of the pressing members are arranged around the opening of the first positioning groove, and the plurality of the pressing members are configured to press the front panel to fix the front panel; and a second clamp, including a second body portion and a plurality of positioning pins, the second body portion having a second positioning groove, the second positioning groove being configured to accommodate the front panel, the plurality of positioning pins being disposed in the second positioning groove and corresponding one-to-one with the plurality of positioning holes, the positioning pins being configured to be inserted into the corresponding positioning holes to position the front panel; wherein, the first clamp is used to position the back panel to expose the front panel, and the second clamp is used to position the front panel to expose the back panel.

[0005] The aforementioned positioning fixture includes a first fixture and a second fixture, which can respectively position the back panel and front panel of the workpiece. The first fixture has a first positioning groove in its first body to accommodate the back panel of the workpiece. Multiple positioning blocks are provided in the first positioning groove, which can cooperate with the snap-fit ​​grooves on the back panel to position the back panel. Multiple holding members can hold the front panel of the workpiece, thus positioning the workpiece effectively. After positioning the workpiece with the first fixture, the front panel of the workpiece can be exposed, facilitating its processing. The second fixture has a second positioning groove in its second body to accommodate the front panel of the workpiece. Multiple positioning pins are inserted into the positioning holes on the front panel to position the workpiece, also providing good positioning. After positioning the workpiece with the second fixture, the back panel of the workpiece can be exposed, facilitating its processing.

[0006] The aforementioned positioning fixture can clamp and position the back panel of the workpiece using the first fixture, while exposing the front panel of the workpiece. The second fixture can clamp and position the front panel of the workpiece, while exposing the back panel of the workpiece, making it convenient to process the front panel and back panel of the workpiece separately.

[0007] In some embodiments, the first body portion further includes a first adhesive groove, which surrounds the opening of the first positioning groove.

[0008] In some embodiments, the first body portion further comprises a plurality of receiving slots, which are arranged around the opening of the first positioning slot. The receiving slots are used to receive the pressing member for positioning the pressing member.

[0009] In some embodiments, the first clamp further includes a plurality of positioning posts, each of which is connected to the first body and is correspondingly disposed with respect to a plurality of positioning holes. The positioning posts are used to be inserted into the corresponding positioning holes to position the front panel.

[0010] In some embodiments, the first body portion further includes a first identification groove, which extends along a direction perpendicular to the axis of the first body portion and is disposed on the side of the first body portion used for connecting the pressure member.

[0011] In some embodiments, the second body portion further includes a second adhesive groove, which surrounds the opening of the second positioning groove.

[0012] In some embodiments, the front panel has multiple machining holes, and the workpiece is also provided with multiple feet. The multiple feet are all connected to the side of the back panel facing the front panel and are respectively arranged in correspondence with the multiple machining holes. The second body part is also provided with multiple connecting holes. The multiple connecting holes are all arranged at the bottom of the second positioning groove and are respectively arranged in correspondence with the multiple feet. The second fixture also includes multiple connectors that are adapted to each of the connecting holes. The multiple connectors are configured to pass through the corresponding connecting holes and connect to the corresponding feet to fix the back panel.

[0013] In some embodiments, the second clamp further includes a plurality of pads configured to be inserted between the front panel and the back panel to support the back panel.

[0014] In some embodiments, the second body portion further includes a second identification groove, which extends along a direction perpendicular to the axis of the second body portion and is disposed on the side of the second body portion used to support the workpiece.

[0015] In some embodiments, the first body portion is provided with a plurality of first locking holes on its periphery, the first locking holes being configured to connect with an external device to fix the first body portion; the second body portion is provided with a plurality of second locking holes on its periphery, the second locking holes being configured to connect with the external device to fix the second body portion. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of the first fixture of the positioning fixture provided in the embodiments of this application.

[0017] Figure 2 for Figure 1 The diagram shows the state of the first fixture positioning the workpiece.

[0018] Figure 3 This is an exploded structural diagram of the second clamp of the positioning fixture provided in the embodiment of this application.

[0019] Figure 4 for Figure 3 The diagram shows the state of the workpiece when the second fixture is positioning it.

[0020] Explanation of main component symbols: Positioning fixture 100, First fixture 10, First body part 11, First positioning groove 111, First glue groove 112, Receiving groove 113, First identification groove 114, First locking hole 115, Positioning block 12, Pressing member 13, Positioning post 14, Second fixture 20, Second body part 21, Second positioning groove 211, Second glue groove 212, Connecting hole 213, Second identification groove 214, Second locking hole 215, Positioning pin 22, Connecting member 23, Gasket 24, Part 200, Front panel 201, Positioning hole 2011, Machining hole 2012, Back panel 202, Snap-fit ​​groove 2021, Standing foot 203. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0025] Please see Figure 1 , Figure 2 and Figure 3This application provides a positioning fixture 100 for positioning the front panel 201 or back panel 202 of a workpiece 200. The front panel 201 has multiple positioning holes 2011, and the back panel 202 has multiple snap-fit ​​grooves 2021. For ease of understanding, the structure of the workpiece 200 in this application embodiment will be described first. Both the front panel 201 and the back panel 202 of the workpiece 200 are plate-like structures. The front panel 201 and the back panel 202 can be directly connected or connected through a columnar structure. Both the front panel 201 and the back panel 202 of the workpiece 200 can be disc-shaped structures. Of course, the workpiece 200 can also have other structures, which are not specifically limited in this application embodiment. The number of positioning holes 2011 on the front panel 201 can be three, four, six, etc., and the number of snap-fit ​​grooves 2021 on the back panel 202 can be three, four, six, etc. In this embodiment, the workpiece 200 positioned by the positioning fixture 100 can be a finished workpiece 200, which can be subjected to surface treatment operations such as polishing and deburring after positioning. Alternatively, the workpiece 200 positioned by the positioning fixture 100 can be a semi-finished workpiece 200, which can be subjected to operations such as drilling and cutting after positioning. The positioning fixture 100 includes a first fixture 10 and a second fixture 20.

[0026] Specifically, please see Figure 1 and Figure 2 The first clamp 10 includes a first body part 11, a plurality of positioning blocks 12 and a plurality of holding members 13. The first body part 11 has a first positioning groove 111, which is configured to accommodate the back panel 202 of the workpiece 200. The plurality of positioning blocks 12 are disposed at the bottom of the first positioning groove 111 and are correspondingly disposed in a plurality of snap-fit ​​grooves 2021. The positioning blocks 12 are configured to be inserted into the corresponding snap-fit ​​grooves 2021 to position the back panel 202. The plurality of holding members 13 are detachably connected to the first body part 11 and are arranged around the opening of the first positioning groove 111. The plurality of holding members 13 are configured to press the front panel 201 to fix the front panel 201. The structure of the first positioning groove 111 is adapted to the structure of the back panel 202 of the workpiece 200. It can be a cylindrical groove. The number and position of the positioning blocks 12 are consistent with the number and position of the snap-fit ​​groove 2021. For example, the number of positioning blocks 12 can be three, four, six, etc. The pressing member 13 is roughly a block structure. The number of pressing members 13 can be three, four, six, etc. The pressing member 13 can be locked to the first body part 11 by bolts, etc.

[0027] Please see Figure 3 and Figure 4The second clamp 20 includes a second body portion 21 and a plurality of positioning pins 22. The second body portion 21 has a second positioning groove 211, which is configured to accommodate the front panel 201. The plurality of positioning pins 22 are disposed in the second positioning groove 211 and are correspondingly disposed in a plurality of positioning holes 2011. The positioning pins 22 are configured to be inserted into the corresponding positioning holes 2011 to position the front panel 201. The structure of the second positioning groove 211 is adapted to the structure of the front panel 201 and can be a cylindrical groove. The number and position of the positioning pins 22 are consistent with the number and position of the positioning holes 2011 on the front panel 201. For example, the number of positioning pins 22 can be three, four, six, etc.

[0028] In this embodiment, the first clamp 10 is used to position the back panel 202 to expose the front panel 201, and the second clamp 20 is used to position the front panel 201 to expose the back panel 202. It can be understood that in this embodiment, when positioning the workpiece 200, only the first clamp 10 or the second clamp 20 is used to expose the front panel 201 or the back panel 202 of the workpiece 200, facilitating processing.

[0029] The positioning fixture 100 provided in this embodiment includes a first fixture 10 and a second fixture 20, which can respectively position the back panel 202 and the front panel 201 of the workpiece 200. The first body 11 of the first fixture 10 has a first positioning groove 111, which can accommodate the back panel 202 of the workpiece 200. Multiple positioning blocks 12 are provided in the first positioning groove 111, which can cooperate with the snap-fit ​​groove 2021 on the back panel 202 to position the back panel 202. Multiple holding members 13 can hold the front panel 201 of the workpiece 200, thereby positioning the workpiece 200 effectively. After the first fixture 10 positions the workpiece 200, the front panel 201 of the workpiece 200 can be exposed, facilitating the processing of the front panel 201. The second body 21 of the second fixture 20 has a second positioning groove 211, which can accommodate the front panel 201 of the workpiece 200. The workpiece 200 is positioned by multiple positioning pins 22 inserted into the positioning holes 2011 on the front panel 201, resulting in good positioning effect. After the workpiece 200 is positioned using the second fixture 20, the back panel 202 of the workpiece 200 can be exposed, which facilitates the processing of the back panel 202 of the workpiece 200.

[0030] The positioning fixture 100 provided in this application embodiment can clamp and position the back panel 202 of the workpiece 200 through the first fixture 10 and expose the front panel 201 of the workpiece 200. The second fixture 20 can clamp and position the front panel 201 of the workpiece 200 and expose the back panel 202 of the workpiece 200, which facilitates the processing of the front panel 201 and the back panel 202 of the workpiece 200 respectively.

[0031] In some embodiments, see Figure 1 and Figure 2 The first body portion 11 also has a first adhesive groove 112, which surrounds the opening of the first positioning groove 111. In this embodiment, the first adhesive groove 112 corresponds to the position of the front panel 201 of the workpiece 200. The first adhesive groove 112 is used to hold the adhesive, thereby bonding the front panel 201 of the workpiece 200 to the first body portion 11 through the adhesive. The bonding effect of the adhesive further enhances the bonding force between the first clamp 10 and the workpiece 200. The adhesive can be hot melt adhesive, etc., which is convenient for applying the adhesive and removing it later. During the processing, the workpiece 200 may be subjected to various external forces. Through the bonding effect of the adhesive, the loosening or displacement of the workpiece 200 in the first clamp 10 can be effectively reduced, thereby improving the processing accuracy. It is understandable that when processing the front panel 201, cutting and grinding operations are required. The clamping member 13 needs to be removed. By setting adhesive in the first adhesive groove 112, the bonding force between the fixture and the workpiece 200 is enhanced, thereby improving the stability of the workpiece 200 when processing the front panel 201.

[0032] In some embodiments, see Figure 1 and Figure 2 The first body 11 also has multiple receiving slots 113, which surround the opening of the first positioning slot 111. The receiving slots 113 are used to receive and position the holding member 13. The number of receiving slots 113 can be three, four, six, etc. The receiving slots 113 provide a precise installation reference for the holding member 13, ensuring that the position of each holding member 13 strictly corresponds to the force point of the workpiece 200, avoiding uneven clamping force due to installation deviations. During installation, the holding member 13 can be positioned quickly and accurately, reducing installation errors, improving installation efficiency, and ensuring that the holding member 13 can apply force evenly to the front panel 201, thereby improving the fixing effect of the first clamp 10 on the workpiece 200.

[0033] In some embodiments, see Figure 1 and Figure 2The first fixture 10 also includes multiple positioning pins 14, each connected to the first body 11 and corresponding one-to-one with multiple positioning holes 2011. The positioning pins 14 are inserted into the corresponding positioning holes 2011 to position the front panel 201. The number and position of the positioning pins 14 are consistent with the number and position of the positioning holes 2011. By inserting the positioning pins 14 into the positioning holes 2011, precise alignment of the front panel 201 can be achieved, significantly improving the positioning accuracy of the front panel 201 and ensuring that the front panel 201 maintains an accurate position during processing or assembly. After the positioning pins 14 are inserted into the positioning holes 2011, they not only provide positioning functionality but also increase the connection strength between the front panel 201 and the fixture. The cooperation between the positioning pins 14 and the positioning holes 2011 effectively prevents displacement or vibration of the front panel 201 during processing.

[0034] In some embodiments, see Figure 1 and Figure 2 The first body portion 11 also has a first identification groove 114, which extends along a direction perpendicular to the axis of the first body portion 11 and is located on the side of the first body portion 11 used to connect the clamping member 13. It is understood that when processing the workpiece 200, the workpiece 200 needs to be accurately positioned. By providing the first identification groove 114, the position of the first clamp 10 can be clearly displayed, avoiding situations such as the first clamp 10 being placed backwards or tilted, thus improving processing accuracy.

[0035] In some embodiments, see Figure 3 and Figure 4 The second body portion 21 also has a second adhesive groove 212, which surrounds the opening of the second positioning groove 211. In this embodiment, the second adhesive groove 212 corresponds to the position of the front panel 201 of the workpiece 200. The second adhesive groove 212 is used to hold the adhesive, thereby bonding the front panel 201 of the workpiece 200 to the second body portion 21 through the adhesive. The bonding force between the second clamp 20 and the workpiece 200 is further enhanced through the adhesive effect of the adhesive. The adhesive can be hot melt adhesive, etc., which is convenient for applying the adhesive and removing it later. During the processing, the workpiece 200 may be subjected to various external forces. Through the adhesive effect of the adhesive, the loosening or displacement of the workpiece 200 in the second clamp 20 can be effectively reduced, thereby improving the processing accuracy.

[0036] In some embodiments, see Figure 3 and Figure 4The front panel 201 has multiple machining holes 2012, and the workpiece 200 also has multiple feet 203. Each foot 203 is connected to the back panel 202 on the side facing the front panel 201 and corresponds one-to-one with a machining hole 2012. The number of machining holes 2012 can be two, three, four, etc., and the number of feet 203 can be two, three, four, etc. For ease of connection, the feet 203 can have threaded holes, etc. It can be understood that during machining, to facilitate fixing the workpiece 200, feet 203 can be provided on the workpiece 200; when the finished workpiece 200 is produced, the feet 203 are milled off.

[0037] The second body 21 also has multiple connecting holes 213, which are located at the bottom of the second positioning groove 211 and correspond one-to-one with the multiple feet 203. The number of connecting holes 213 can be two, three, four, six, etc. The second fixture 20 also includes multiple connectors 23 that are adapted to each connecting hole 213. These connectors 23 are configured to pass through the corresponding connecting holes 213 and connect to the corresponding feet 203 to fix the back panel 202. The connectors 23 can be bolts, etc., and the number of connectors 23 matches the number of connecting holes 213, and can be two, three, four, six, etc. When fixing the workpiece 200 using the second fixture 20, the connectors 23 passing through the connecting holes 213 and connecting to the corresponding feet 203 can lock the workpiece 200 onto the second fixture 20, thereby improving the stability of the workpiece 200 during processing.

[0038] In some embodiments, see Figure 3 and Figure 4 The second clamp 20 also includes multiple pads 24, which are configured to be inserted between the front panel 201 and the back panel 202 to support the back panel 202. The number of pads 24 can be two, three, four, etc. In this embodiment, all pads 24 are arc-shaped, and multiple pads 24 form a ring structure. By providing pads 24, the back panel 202 can be supported during processing, improving the stability of the back panel 202 during processing.

[0039] In some embodiments, see Figure 3 and Figure 4 The second body portion 21 also has a second identification groove 214, which extends along a direction perpendicular to the axis of the second body portion 21 and is located on the side of the second body portion 21 used to support the workpiece 200. It is understood that when processing the workpiece 200, its position needs to be accurately placed. By providing the second identification groove 214, the position of the second fixture 20 can be clearly displayed, avoiding situations such as the second fixture 20 being placed backwards or tilted, thus improving processing accuracy.

[0040] In some embodiments, see Figure 1 and Figure 3 The first body portion 11 has multiple first locking holes 115 on its periphery, which are configured to connect with an external device (not shown) to fix the first body portion 11. The second body portion 21 has multiple second locking holes 215 on its periphery, which are configured to connect with an external device to fix the second body portion 21. Both the first locking holes 115 and the second locking holes 215 can be threaded holes. The number of first locking holes 115 and second locking holes 215 can be two, three, four, etc. By providing the first locking holes 115 and the second locking holes 215, it is convenient to fix the first body portion 11 and the second body portion 21 to the external device, which helps to improve the stability of the first body portion 11 and the second body portion 21, and thus improves the stability of the workpiece 200 during the processing. The external device can be a positioning machine or the like. It can be understood that when processing the middle position of the front panel 201 and the back panel 202, the second clamp 20 can be fixed in the vertical direction for convenient processing.

[0041] The working process of the positioning fixture 100 provided in this embodiment is roughly as follows:

[0042] In the preparation stage, the raw material of workpiece 200 is preliminarily processed to process the front panel 201 and back panel 202 of workpiece 200 on the raw material, and the positioning hole 2011 is processed on the front panel 201 and the snap-fit ​​groove 2021 is processed on the back panel 202.

[0043] First, the workpiece 200 is installed in the first fixture 10, which is then fixedly connected to an external device via the first locking hole 115. During installation, the back panel 202 of the workpiece 200 is placed in the first positioning groove 111 of the first fixture 10, and the workpiece 200 is positioned by the engagement of the positioning block 12 with the snap-fit ​​groove 2021 and the engagement of the positioning post 14 with the positioning hole 2011. The workpiece 200 is then pressed by multiple holding members 13, thus completing the positioning of the workpiece 200. Then, the workpiece 200 is preliminarily machined. Machining holes 2012 are machined on the front panel 201 of the workpiece 200, and the side of the back panel 202 opposite to the front panel 201 of the workpiece 200 is machined to form the feet 203.

[0044] Then, the workpiece 200 is removed from the first fixture 10 and installed in the second fixture 20, which is then fixedly connected to the external device. During installation, the front panel 201 of the workpiece 200 is placed in the second positioning groove 211 of the second fixture 20, and the workpiece 200 is positioned by the engagement of the positioning pin 22 with the positioning hole 2011. Then, multiple connectors 23 are passed through the corresponding connecting holes 213 and fixedly connected to the corresponding feet 203 to improve the stability of the workpiece 200. The back panel 202 of the workpiece 200 can then be preliminarily machined, and the sides of the workpiece 200 can also be machined.

[0045] Next, the workpiece 200 is removed from the second fixture 20 and installed in the first fixture 10. During installation, adhesive is first applied to the first adhesive groove 112, and then the back panel 202 of the workpiece 200 is placed in the first positioning groove 111 of the first fixture 10. The workpiece 200 is positioned by the engagement of the positioning block 12 with the snap-fit ​​groove 2021 and the engagement of the positioning post 14 with the positioning hole 2011. After the adhesive solidifies, the front panel 201 and the feet 203 of the workpiece 200 can be precision machined, so that the side of the feet 203 away from the back panel 202 and the side of the front panel 201 away from the back panel 202 are on the same plane.

[0046] Then, the workpiece 200 is removed from the first fixture 10 and installed in the second fixture 20. During installation, adhesive is first applied to the second adhesive groove 212, and then the front panel 201 of the workpiece 200 is placed in the second positioning groove 211 of the second fixture 20. The workpiece 200 is positioned by the engagement of the positioning pin 22 and the positioning hole 2011. After the adhesive has solidified, the back panel 202 of the workpiece 200 can be precision machined.

[0047] Finally, the workpiece 200 is removed from the second fixture 20 and installed in the first fixture 10. During installation, the back panel 202 of the workpiece 200 is placed in the first positioning groove 111 of the first fixture 10, and the workpiece 200 is positioned by the cooperation of the positioning block 12 and the snap-fit ​​groove 2021, and the cooperation of the positioning post 14 and the positioning hole 2011. The workpiece 200 is pressed by multiple holding members 13, and then the multiple feet 203 are processed and removed.

[0048] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A positioning fixture for positioning a front panel or a back panel of a workpiece, wherein the front panel has a plurality of positioning holes and the back panel has a plurality of engaging slots, characterized in that, The positioning fixture includes: A first clamp includes a first body, a plurality of positioning blocks, and a plurality of holding members. The first body has a first positioning groove configured to accommodate the back panel of the workpiece. The plurality of positioning blocks are disposed at the bottom of the first positioning groove and correspond one-to-one with the plurality of snap-fit ​​slots. The positioning blocks are configured to be inserted into the corresponding snap-fit ​​slots to position the back panel. The plurality of holding members are detachably connected to the first body and are arranged around the opening of the first positioning groove. The plurality of holding members are configured to hold the front panel to fix the front panel. The second clamp includes a second body and a plurality of positioning pins. The second body has a second positioning groove configured to accommodate the front panel. The plurality of positioning pins are disposed within the second positioning groove and correspond one-to-one with the plurality of positioning holes. The positioning pins are configured to be inserted into the corresponding positioning holes to position the front panel. The first clamp is used to position the back panel to expose the front panel, and the second clamp is used to position the front panel to expose the back panel.

2. The positioning fixture as described in claim 1, characterized in that, The first body part is also provided with a first glue groove, which is arranged around the opening of the first positioning groove.

3. The positioning fixture as described in claim 1, characterized in that, The first body portion is also provided with a plurality of receiving slots, which are arranged around the opening of the first positioning slot. The receiving slots are used to receive the pressing member for positioning the pressing member.

4. The positioning fixture as described in claim 1, characterized in that, The first clamp also includes a plurality of positioning posts, each of which is connected to the first body and is configured to correspond one-to-one with a plurality of positioning holes. The positioning posts are used to be inserted into the corresponding positioning holes to position the front panel.

5. The positioning fixture as described in claim 1, characterized in that, The first body portion is also provided with a first identification groove, which extends along a direction perpendicular to the axis of the first body portion and is disposed on the side of the first body portion used to connect the pressure member.

6. The positioning fixture as described in claim 1, characterized in that, The second body part is also provided with a second glue groove, which is arranged around the opening of the second positioning groove.

7. The positioning fixture as described in claim 1, characterized in that, The front panel has multiple machining holes, and the workpiece is also provided with multiple support feet. The multiple support feet are all connected to the side of the back panel facing the front panel and are respectively arranged in a one-to-one correspondence with the multiple machining holes. The second body part is also provided with a plurality of connecting holes, which are all located at the bottom of the second positioning groove and are respectively provided with a plurality of standing feet; The second clamp also includes a plurality of connectors that are adapted to each of the connection holes. The plurality of connectors are configured to pass through the corresponding connection holes and connect to the corresponding feet to fix the back panel.

8. The positioning fixture as described in claim 1, characterized in that, The second clamp also includes a plurality of pads configured to be inserted between the front panel and the back panel to support the back panel.

9. The positioning fixture as described in claim 1, characterized in that, The second body portion is also provided with a second identification groove, which extends along a direction perpendicular to the axis of the second body portion and is disposed on the side of the second body portion used to support the workpiece.

10. The positioning fixture as described in claim 1, characterized in that, The first body portion has a plurality of first locking holes on its periphery, and the first locking holes are configured to connect with an external device to fix the first body portion. The second body portion has a plurality of second locking holes on its periphery, and the second locking holes are configured to connect with the external device to fix the second body portion.

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