Positioning jig

Abstract

The utility model provides a positioning jig which is used for positioning a workpiece and comprises a clamping assembly and a positioning assembly, the clamping assembly comprises a bottom plate and a cover plate covering the bottom plate and clamping the workpiece in the cover plate, the cover plate is provided with a first machining window, and the bottom plate is provided with a second machining window and a plurality of receding grooves surrounding the second machining window; the positioning assembly comprises a bearing face, a base, a supporting piece, a plurality of bottom plate supporting blocks and a plurality of cover plate supporting blocks, the base, the supporting piece, the bottom plate supporting blocks and the cover plate supporting blocks are all arranged on the bearing face, the distance between the supporting piece and the bearing face is larger than the distance between the cover plate supporting blocks and the bearing face, and the distance between the cover plate supporting blocks and the bearing face is larger than the distance between the bottom plate supporting blocks and the bearing face; and the plurality of cover plate supporting blocks are respectively arranged corresponding to the plurality of avoiding grooves. According to the positioning jig, the workpiece can be clamped and positioned through the clamping assembly, the bottom plate or the cover plate can be supported through the positioning assembly, then the two faces of the workpiece can be machined, the machining efficiency of the workpiece can be improved, and the machining cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of mechanical processing technology, and in particular to a positioning fixture. Background Art

[0002] When sandblasting two sides of a workpiece, two sets of jigs are generally used to position the workpiece in sequence so as to perform sandblasting on both sides of the workpiece in sequence. However, the above operation method requires two sets of jigs, which is costly, and after processing one side of the workpiece, the workpiece needs to be removed from one set of jigs and installed in another set of jigs, which has many operation processes and high labor intensity, reducing the processing efficiency of the workpiece. Utility Model Content

[0003] In view of the above, it is necessary to propose a positioning fixture to improve the processing efficiency of the workpiece and reduce the processing cost.

[0004] The embodiment of the present application provides a positioning fixture for positioning a workpiece, the workpiece comprising an outer frame and an inner plate connected to the outer frame, the inner plate being at different distances from two relatively outer sides of the outer frame, the positioning fixture comprising: a clamping assembly, comprising a cover plate and a base plate hinged to the cover plate, the cover plate covering the base plate to cooperate with the base plate to clamp the workpiece, the cover plate being provided with a first processing window, a second processing window being provided on the base plate at a position corresponding to the first processing window, a plurality of avoidance grooves surrounding the second processing window being provided on a side of the base plate away from the cover plate; and a positioning assembly for carrying the clamping assembly, the positioning assembly comprising a base, a support member, a plurality of base plate support blocks and a plurality of cover plate support blocks, the base having a bearing surface, the support member, the plurality of base plate support blocks and the plurality of cover plate support blocks are all arranged on the bearing surface, the plurality of base plate support blocks and the plurality of cover plate support blocks are all arranged around the support member, and the support member The distance between the inner plate and the bearing surface is greater than the distance between the cover plate support block and the bearing surface, and the distance between the cover plate support block and the bearing surface is greater than the distance between the base plate support block and the bearing surface; wherein, a plurality of the cover plate support blocks are respectively arranged corresponding to a plurality of the avoidance grooves; when the cover plate and the base plate clamp the workpiece, the sum of the distance between the inner plate and the base plate away from the side of the cover plate and the distance between the base plate support block and the bearing surface is equal to the distance between the support member and the bearing surface, and when the base plate is placed on the base, the base plate support block supports the base plate, and the support member supports the inner plate; the distance between the inner plate and the cover plate away from the side of the base plate and the distance between the cover plate support block and the bearing surface is equal to the distance between the support member and the bearing surface, and when the cover plate is placed on the base, the cover plate support block supports the cover plate, and the support member supports the inner plate.

[0005] The above-mentioned positioning fixture can fix the workpiece through the cover plate and the base plate in the clamping assembly. The first processing window on the cover plate and the second processing window on the base plate can expose both sides of the inner plate of the workpiece. When the base plate is placed on the base, the base plate abuts against the base plate support block, and the avoidance groove on the base plate avoids the cover plate support block. The support member abuts against the inner plate to complete the positioning of the workpiece. At this time, one surface of the workpiece can be processed through the first processing window; when the cover plate is placed on the base, the cover plate abuts against the cover plate support block, and the support member abuts against the inner plate to complete the positioning of the workpiece. At this time, the other surface of the workpiece can be processed through the second processing window. During the processing of the workpiece, the support member abuts against the inner plate of the workpiece to improve the support stability and avoid deformation of the inner plate during processing. The above-mentioned positioning fixture can position the workpiece through the clamping assembly. When processing the workpiece, the clamping assembly is placed on the positioning assembly to complete the positioning of the clamping assembly, and then one side of the workpiece can be processed. When the other side of the workpiece needs to be processed, it is only necessary to flip the clamping assembly. There is no need to disassemble the workpiece, which reduces labor intensity and the number of times the workpiece is installed and disassembled, thereby reducing the chance of damage to the workpiece during the disassembly process. Both sides of the workpiece can be processed by a set of fixtures, which reduces costs.

[0006] In some embodiments, the clamping assembly also includes a plurality of limiting members that are all connected to the base plate and arranged around the second processing window. When the cover plate and the base plate clamp the workpiece, the plurality of limiting members abut against the outer wall of the outer frame to limit the workpiece.

[0007] In some embodiments, the limiting member includes a fixing pin and a flexible sleeve disposed outside the fixing pin, the fixing pin is fixedly connected to the base plate, and the flexible sleeve is in flexibly contact with the workpiece.

[0008] In some embodiments, the clamping assembly also includes a first limiting ring and a second limiting ring. The first limiting ring is arranged on a side of the cover plate close to the base plate and surrounds the first processing window. The second limiting ring is arranged on a side of the base plate close to the cover plate and surrounds the second processing window. The first limiting ring and the second limiting ring cooperate with each other to clamp the outer frame when the cover plate covers the base plate.

[0009] In some embodiments, a first limiting portion is provided on the side of the first limiting ring facing the base plate, and the first limiting portion is arranged around the inner side of the first limiting ring; a second limiting portion is provided on the side of the second limiting ring facing the cover plate, and the second limiting portion is arranged around the inner side of the second limiting ring; when the cover plate covers the base plate, the first limiting portion and the second limiting portion both abut against the inner wall of the outer frame to limit the workpiece.

[0010] In some embodiments, a plurality of first positioning columns are provided on a side of the base plate close to the cover plate, and a plurality of first positioning holes corresponding to the first positioning columns are opened on a side of the cover plate close to the base plate. When the cover plate covers the base plate, the first positioning columns are inserted into the corresponding first positioning holes to position the cover plate.

[0011] In some embodiments, a plurality of first magnetic members are disposed on a side of the cover plate close to the base plate, and a plurality of second magnetic members corresponding to the first magnetic members are disposed on a side of the base plate close to the cover plate. When the cover plate is covered on the base plate, the first magnetic members and the second magnetic members attract each other to fix the cover plate and the base plate.

[0012] In some embodiments, a first slope surrounding the first processing window is disposed on a side of the cover plate away from the base plate, and a second slope surrounding the second processing window is disposed on a side of the base plate away from the cover plate.

[0013] In some embodiments, a plurality of second positioning columns are further provided on the base, a plurality of second positioning holes corresponding to the second positioning columns are provided on the bottom plate, and a plurality of third positioning holes corresponding to the second positioning columns are provided on the cover plate. When the bottom plate is placed on the base, the second positioning columns are inserted into the second positioning holes to position the bottom plate, and when the cover plate is placed on the base, the second positioning columns are inserted into the third positioning holes to position the cover plate.

[0014] In some embodiments, a plurality of limiting protrusions are further provided on the base, and the plurality of limiting protrusions are used to abut against the bottom plate or the cover plate to limit the bottom plate or the cover plate when the bottom plate or the cover plate is placed on the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a positioning fixture provided in an embodiment of the present application.

[0016] Figure 2 for Figure 1 The schematic diagram of the structure of the workpiece to which the positioning fixture shown is applicable.

[0017] Figure 3 for Figure 2 Another schematic structural diagram of the workpiece shown.

[0018] Figure 4 for Figure 1 The diagram shown is a partial structural disassembly diagram of the positioning fixture after the clamping component is opened.

[0019] Figure 5 for Figure 1Another angle structural schematic diagram of the clamping assembly of the positioning fixture shown.

[0020] Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure along line VI-VI.

[0021] Figure 7 for Figure 6 The schematic diagram of the structure of the positioning fixture after the clamping component and the positioning component are separated.

[0022] Figure 8 for Figure 1 A schematic structural diagram of the positioning assembly of the positioning fixture shown.

[0023] Fig. 9 A schematic diagram of the structure in which the cover plate of the positioning fixture provided in an embodiment of the present application is placed on the positioning assembly.

[0024] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure along line X-X.

[0025] Main component symbols

[0026] Positioning fixture 100

[0027] Clamping assembly 10

[0028] Cover 11

[0029] The first processing window 111

[0030] First positioning hole 112

[0031] The first magnetic member 113

[0032] The third positioning hole 114

[0033] The first inclined surface 115

[0034] Bottom plate 12

[0035] The second processing window 121

[0036] Avoidance slot 122

[0037] The first positioning column 123

[0038] The second magnetic member 124

[0039] Second positioning hole 125

[0040] Second slope 126

[0041] Limiting piece 13

[0042] Fixing pin 131

[0043] Flexible sleeve 132

[0044] The first limiting ring 14

[0045] The first limiting portion 141

[0046] The second limiting ring 15

[0047] The second limiting portion 151

[0048] Hinge 16

[0049] Positioning component 20

[0050] Base 21

[0051] Bearing surface 211

[0052] Support 22

[0053] Bottom plate support block 23

[0054] Cover support block 24

[0055] Second positioning column 25

[0056] Limiting protrusion 26

[0057] Workpiece 200

[0058] Frame 201

[0059] Exterior Wall 2011

[0060] Inner Wall 2012

[0061] First side 2013

[0062] Second Side 2014

[0063] Inner plate 202

[0064] First Interview 2021

[0065] Second Side 2022 DETAILED DESCRIPTION

[0066] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0067] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0068] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, 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 mutual communication, it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. Some embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0069] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0070] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present application provides a positioning fixture 100 for positioning a workpiece 200. The workpiece 200 includes an outer frame 201 and an inner plate 202 connected to the inner part of the outer frame 201. The distances between the inner plate 202 and the two opposite outer sides of the outer frame 201 are different. It can be understood that the outer frame 201 includes an inner wall 2012 and an outer wall 2011, as well as a first side 2013 and a second side 2014. The inner plate 202 includes two surfaces. For ease of description, the surface of the inner plate 202 close to the first side 2013 of the outer frame 201 is defined as the first surface 2021, and the surface close to the second side 2014 of the outer frame 201 is defined as the second surface 2022, and the distance between the first surface 2021 and the first side 2013 is less than the distance between the second surface 2022 and the second side 2014. The workpiece 200 can be a combination of a middle plate and a side frame of an electronic product such as a mobile phone or a tablet. The positioning fixture 100 includes a clamping assembly 10 and a positioning assembly 20.

[0071] See also Figure 4 and Figure 5The clamping assembly 10 includes a cover plate 11 and a base plate 12. The cover plate 11 is hinged to the base plate 12 and covers the base plate 12 to cooperate with the base plate 12 to clamp the workpiece 200. The cover plate 11 is a U-shaped structure and is provided with a first processing window 111. The first processing window 111 is arranged in the middle of the cover plate 11. When the cover plate 11 cooperates with the base plate 12 to clamp the workpiece 200, the first processing window 111 exposes the first surface 2021 of the inner plate 202 so that an external processing equipment (not shown) can process the first surface 2021.

[0072] See also Figure 1 and Figure 5 A first inclined surface 115 surrounding the first processing window 111 is disposed on the side of the cover plate 11 away from the bottom plate 12. Figure 2 and Figure 3 By providing the first inclined surface 115 , the thickness of the position where the cover plate 11 contacts the first surface 2021 can be reduced, thereby preventing the cover plate 11 from blocking the first surface 2021 of the workpiece 200 when processing the workpiece 200 .

[0073] See also Figure 2 , Figure 3 and Figure 4 The clamping assembly 10 also includes a first limiting ring 14, which is arranged on a side of the cover plate 11 close to the base plate 12 and surrounds the first processing window 111. The first limiting ring 14 is a rounded rectangle corresponding to the first processing window 111. The first limiting ring 14 is fixedly connected to the cover plate 11 by screws. When the cover plate 11 cooperates with the base plate 12 to clamp the workpiece 200, the first limiting ring 14 abuts against the first side 2013 of the outer frame 201.

[0074] See also Figure 2 , Figure 3 and Figure 6 , the first limiting ring 14 is provided with a first limiting portion 141 on the side facing the bottom plate 12, and the first limiting portion 141 is arranged around the inner side of the first limiting ring 14. When the cover plate 11 covers the bottom plate 12, the first limiting portion 141 abuts against the inner wall 2012 of the outer frame 201 to limit the workpiece 200. The first limiting portion 141 is a rounded rectangle corresponding to the outer frame 201, and is convexly arranged on the first limiting ring 14. It can be understood that the height of the first limiting portion 141 protruding from the first limiting ring 14 is not greater than the distance between the first surface 2021 of the inner plate 202 and the first side 2013 of the outer frame 201. When the cover plate 11 cooperates with the bottom plate 12 to clamp the workpiece 200, the first limiting portion 141 abuts against the inner wall 2012 of the outer frame 201 to limit the outer frame 201.

[0075] See also Figure 4A plurality of first magnetic members 113 are disposed on one side of the cover plate 11 close to the bottom plate 12. A plurality of first positioning holes 112 and a plurality of third positioning holes 114 are opened on one side of the cover plate 11 close to the bottom plate 12.

[0076] See also Figure 4 and Figure 5 The bottom plate 12 is a square-shaped structure and a second processing window 121 is provided at a position corresponding to the first processing window 111. The second processing window 121 is provided in the middle of the bottom plate 12. When the bottom plate 12 cooperates with the cover plate 11 to clamp the workpiece 200, the second processing window 121 exposes the second surface 2022 of the inner plate 202 so that an external device can process the second surface 2022. It can be understood that the shapes and sizes of the first processing window 111 and the second processing window 121 correspond to the positions to be processed of the workpiece 200, such as the first processing window 111 and the second processing window 121 can be rounded rectangles.

[0077] See also Figure 1 and Figure 5 A second inclined surface 126 surrounding the second processing window 121 is provided on the side of the bottom plate 12 away from the cover plate 11. By providing the second inclined surface 126, the thickness of the position where the bottom plate 12 contacts the second surface 2022 can be reduced, thereby preventing the bottom plate 12 from blocking the second surface 2022 of the workpiece 200 when processing the workpiece 200.

[0078] See also Figure 2 , Figure 3 and Figure 4 The clamping assembly 10 further includes a second limiting ring 15, which is disposed on a side of the bottom plate 12 close to the cover plate 11 and surrounds the second processing window 121. The first limiting ring 14 and the second limiting ring 15 cooperate with each other to clamp the outer frame 201 when the cover plate 11 covers the bottom plate 12. The second limiting ring 15 is a rounded rectangle corresponding to the second processing window 121. The second limiting ring 15 is connected to the bottom plate 12 by screws or the like. When the bottom plate 12 cooperates with the cover plate 11 to clamp the workpiece 200, the second limiting ring 15 abuts against the second side 2014 of the outer frame 201. In this way, the stability of the cover plate 11 and the bottom plate 12 when clamping the workpiece 200 can be improved.

[0079] See also Figure 2 , Figure 3 and Figure 6The second limiting ring 15 is provided with a second limiting portion 151 on the side facing the cover plate 11. The second limiting portion 151 is arranged around the inner side of the second limiting ring 15. The second limiting portion 151 abuts against the inner wall 2012 of the outer frame 201 to limit the workpiece 200. The second limiting portion 151 is a rounded rectangle corresponding to the outer frame 201, and is protruded from the body of the second limiting ring 15. It can be understood that the height of the second limiting portion 151 protruding from the second limiting ring 15 is not greater than the distance between the second surface 2022 of the inner plate 202 and the second side 2014 of the outer frame 201. When the bottom plate 12 cooperates with the cover plate 11 to clamp the workpiece 200, the second limiting portion 151 also abuts against the inner wall 2012 of the outer frame 201 to limit the outer frame 201. In this way, the first limiting portion 141 and the second limiting portion 151 abut against the inner wall 2012 of the outer frame 201 to limit the position of the workpiece 200 .

[0080] See also Figure 2 and Figure 4 The clamping assembly 10 further includes a plurality of stoppers 13 connected to the bottom plate 12 and arranged around the second processing window 121. When the cover plate 11 and the bottom plate 12 clamp the workpiece 200, the plurality of stoppers 13 abut against the outer wall 2011 of the outer frame 201 to limit the position of the workpiece 200. The stopper is a columnar structure. The plurality of stoppers 13 surround the second processing window 121 and are arranged toward the cover plate 11. By providing the plurality of stoppers 13, when the workpiece 200 is placed on the bottom plate 12, the outer wall 2011 of the outer frame 201 abuts against the plurality of stoppers 13, thereby positioning the workpiece 200, so as to improve the accuracy of the cover plate 11 and the bottom plate 12 when clamping the workpiece 200.

[0081] See also Figure 4 The stopper 13 includes a fixed pin 131 and a flexible sleeve 132 disposed outside the fixed pin 131. The fixed pin 131 is fixedly connected to the bottom plate 12, and the flexible sleeve 132 is in flexible contact with the workpiece 200. The fixed pin 131 is a metal part to improve its structural strength, and the material of the flexible sleeve 132 can be urethane to prevent the stopper 13 from being in rigid contact with the workpiece 200, resulting in damage to the surface of the workpiece 200.

[0082] A plurality of first positioning columns 123 are provided on one side of the bottom plate 12 close to the cover plate 11, and the positions of the plurality of first positioning holes 112 and the plurality of first positioning columns 123 correspond one to one. When the cover plate 11 covers the bottom plate 12, the first positioning columns 123 are inserted into the corresponding first positioning holes 112 to position the cover plate 11. The first positioning columns 123 can be provided with two, three, four, etc., and the number of the first positioning holes 112 and the first positioning columns 123 is consistent, and can be provided with two, three, four, etc. In this way, when the cover plate 11 covers the bottom plate 12, the cover plate 11 can be positioned by the cooperation of the first positioning columns 123 and the first positioning holes 112, so as to improve the accuracy of the cover plate 11 when cooperating with the bottom plate 12 to clamp the workpiece 200.

[0083] See also Figure 4 , a plurality of second magnetic members 124 corresponding to the first magnetic member 113 are arranged on one side of the bottom plate 12 close to the cover plate 11, and when the cover plate 11 is covered on the bottom plate 12, the first magnetic member 113 and the second magnetic member 124 attract each other to fix the cover plate 11 and the bottom plate 12. The first magnetic member 113 and the second magnetic member 124 can be magnets at the same time, or one is a magnet and the other is an iron member, so that the two can attract each other. It can be understood that when the first magnetic member 113 and the second magnetic member 124 are both magnets, the magnetic pole of the first magnetic member 113 facing the second magnetic member 124 is opposite to the magnetic pole of the second magnetic member 124 facing the first magnetic member 113. Both the first magnetic member 113 and the second magnetic member 124 can be disc-shaped structures, and corresponding accommodating grooves are arranged on the cover plate 11 and the bottom plate 12 to hide the first magnetic member 113 in the cover plate 11 and the first magnetic member 113 in the bottom plate 12. By providing the first magnetic member 113 and the second magnetic member 124, the cover plate 11 can be adsorbed on the bottom plate 12 when the cover plate 11 covers the bottom plate 12, thereby improving the bonding strength between the cover plate 11 and the bottom plate 12 and preventing the cover plate 11 and the bottom plate 12 from loosening during processing, resulting in poor processing.

[0084] See also Figure 4 and Figure 8 A plurality of avoidance grooves 122 surrounding the second processing window 121 are formed on the side of the bottom plate 12 facing away from the cover plate 11 , and a plurality of second positioning holes 125 are also formed on the bottom plate 12 .

[0085] See also Figure 5, a hinge 16 is provided on one side of the cover plate 11 and the bottom plate 12 so that the cover plate 11 and the bottom plate 12 can be rotatably connected. In this way, the cover plate 11 and the bottom plate 12 can be rotatably connected through the hinge 16, so that the cover plate 11 and the bottom plate 12 are connected together, which can improve the connection stability of the cover plate 11 and the bottom plate 12 and avoid the cover plate 11 and the bottom plate 12 being separated during the transfer or processing process, and can also make the cover plate 11 and the bottom plate 12 appear in pairs, so as to avoid the cover plate 11 and its corresponding bottom plate 12 being separated during the storage or use process, resulting in unusability, and at the same time, it is convenient for operators to cover the cover plate 11 on the bottom plate 12.

[0086] See also Figure 1 , Figure 8 and Fig. 9 The positioning assembly 20 is used to carry the clamping assembly 10. The positioning assembly 20 includes a base 21, a support member 22, a plurality of bottom plate support blocks 23 and a plurality of cover plate support blocks 24. The base 21 has a bearing surface 211. The support member 22, a plurality of bottom plate support blocks 23 and a plurality of cover plate support blocks 24 are all arranged on the bearing surface 211. The plurality of bottom plate support blocks 23 and the plurality of cover plate support blocks 24 are all arranged around the support member 22. The distance between the support member 22 and the bearing surface 211 is greater than the distance between the cover plate support block 24 and the bearing surface 211. The distance between the cover plate support block 24 and the bearing surface 211 is greater than the distance between the bottom plate support block 23 and the bearing surface 211. The base 21 is a plate-like structure to improve the support stability. The support member 22 is a block-like structure. The cross-sectional area of ​​the support member 22 is smaller than the area of ​​the first processing window 111 and the second processing window 121, and the structure of the support member 22 corresponds to the structure of the inner plate 202. The number of the bottom plate support blocks 23 can be four, six, eight, etc., as long as they can stably support the bottom plate 12. The number of the cover plate support blocks 24 can be four, six, eight, etc., as long as they can stably support the cover plate 11.

[0087] See also Figure 1 , Figure 4 and Figure 8 , the cover plate 11 is provided with three first processing windows 111 arranged side by side, the bottom plate 12 is provided with three second processing windows 121 arranged side by side, and the second processing windows 121 are arranged corresponding to the first processing windows 111, and three support members 22 are provided on the base 21, and the positions of the support members 22 are arranged corresponding to the first processing windows 111, and three first limiting rings 14 and second limiting rings 15 are also provided. In this way, the positioning fixture 100 can position three workpieces 200 at the same time, and then can process three workpieces 200 at the same time, thereby improving the working efficiency. It can be understood that the first processing window 111, the second processing window 121 and the support member 22 can also be other numbers, as long as their positions can correspond to each other, and no limitation is made here.

[0088] The plurality of cover plate support blocks 24 are respectively arranged corresponding to the plurality of avoidance grooves 122. The number of the avoidance grooves 122 is the same as the number of the cover plate support blocks 24 and the positions are corresponding. When the bottom plate 12 is placed on the base 21, the avoidance grooves 122 avoid the cover plate support blocks 24, so that the bottom plate 12 can abut against the bottom plate support blocks 23.

[0089] See also Figure 6 and Figure 7 When the cover plate 11 and the bottom plate 12 clamp the workpiece 200, the sum of the distance between the inner plate 202 and the side of the bottom plate 12 away from the cover plate 11 and the distance between the bottom plate support block 23 and the bearing surface 211 is equal to the distance between the support member 22 and the bearing surface 211, so that when the bottom plate 12 is placed on the base 21, the bottom plate support block 23 supports the bottom plate 12, and the support member 22 supports the inner plate 202. The sum of the distance between the inner plate 202 and the side of the cover plate 11 away from the bottom plate 12 and the distance between the cover plate support block 24 and the bearing surface 211 is equal to the distance between the support member 22 and the bearing surface 211, so that when the cover plate 11 is placed on the base 21, the cover plate support block 24 supports the cover plate 11, and the support member 22 supports the inner plate 202.

[0090] For easier understanding, see Figure 2 , Figure 3 and Figure 7 , it is defined that after the cover plate 11 and the base plate 12 clamp the workpiece 200, the distance between the second surface 2022 of the inner plate 202 and the side of the base plate 12 away from the cover plate 11 is d1, the distance between the first surface 2021 of the inner plate 202 and the side of the cover plate 11 away from the base plate 12 is d2, the height of the base plate support block 23 relative to the bearing surface 211 is h1, the height of the cover plate support block 24 relative to the bearing surface 211 is h2, and the height of the support member 22 relative to the bearing surface 211 is h3, then d1>d2, h1<h2<h3, d1+h1=h3, d2+h2=h3.

[0091] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 When the bottom plate 12 is placed on the base 21, the bottom plate support block 23 supports the bottom plate 12, and the support member 22 abuts against the second surface 2022 of the inner plate 202. When the first surface 2021 of the inner plate 202 is processed, the support member 22 can support the inner plate 202 to prevent the inner plate 202 from being deformed due to processing. Fig. 9 and Fig.10 When the cover plate 11 is placed on the base 21, the cover plate support block 24 supports the cover plate 11, and the support member 22 abuts against the first surface 2021 of the inner plate 202. Then, when the inner second surface 2022 is processed, the support member can support the inner plate 202 to avoid deformation of the inner plate 202 due to processing.

[0092] See also Figure 4 and Figure 8 , the base 21 is also provided with a plurality of second positioning posts 25, the positions of the second positioning holes 125 and the third positioning holes 114 correspond to the positions of the second positioning posts 25, when the bottom plate 12 is placed on the base 21, the second positioning posts 25 are inserted into the second positioning holes 125 to position the bottom plate 12, and when the cover plate 11 is placed on the base 21, the second positioning posts 25 are inserted into the third positioning holes 114 to position the cover plate 11. The second positioning posts 25 may be pins, etc., and the number of the second positioning posts 25 may be two, three, four, etc. The number and position of the second positioning holes 125 correspond to the second positioning posts 25, so that when the bottom plate 12 is placed on the base 21, the second positioning posts 25 can be inserted into the second positioning holes 125 to position the bottom plate 12. The number and position of the third positioning holes 114 correspond to the second positioning posts 25, so that when the cover plate 11 is placed on the base 21, the second positioning posts 25 can be inserted into the third positioning holes 114 to position the cover plate 11. It can be understood that when the multiple second positioning columns 25 on the base 21 are symmetrically placed, the multiple second positioning holes 125 and the multiple third positioning holes 114 are also symmetrically arranged. At this time, the second positioning holes 125 are connected to the corresponding third positioning holes 114.

[0093] See also Figure 1 and Figure 8 The base 21 is also provided with a plurality of limiting protrusions 26, which are used to abut the base 12 or the cover 11 when the base 12 or the cover 11 is placed on the base 21, and limit the base 12 or the cover 11. The limiting protrusions 26 are strip-shaped structures. When the base 12 is placed on the base 21, the base 12 abuts against the limiting protrusions 26, and the limiting protrusions 26 limit the base 12. When the cover 11 is placed on the base 21, the cover 11 abuts against the limiting protrusions 26, and the limiting protrusions 26 limit the cover 11, so as to improve the stability of the clamping assembly 10 on the base 21.

[0094] The positioning fixture 100 provided in the embodiment of the present application can fix the workpiece 200 through the cover plate 11 and the base plate 12 in the clamping assembly 10. The first processing window 111 on the cover plate 11 and the second processing window 121 on the base plate 12 can expose both sides of the inner plate 202 of the workpiece 200. When the base plate 12 is placed on the base 21, the base plate 12 abuts against the base plate support block 23, and the avoidance groove 122 on the base plate 12 avoids the cover plate support block 24. The support member 22 abuts against the inner plate 202 to complete the positioning of the workpiece 200. At this time, the first surface 2021 of the workpiece 200 can be processed through the first processing window 111; when the cover plate 11 is placed on the base 21, the cover plate 11 abuts against the cover plate support block 24, and the support member 22 abuts against the inner plate 202 to complete the positioning of the workpiece 200. At this time, the second surface 2022 of the workpiece 200 can be processed through the second processing window 121. During the processing of the workpiece 200, the support member 22 abuts against the inner plate 202 of the workpiece 200 to improve the support stability and avoid deformation of the inner plate 202 during the processing. The positioning fixture 100 provided by the present application can position the workpiece 200 through the clamping assembly 10. When processing the workpiece 200, the clamping assembly 10 is placed on the positioning assembly 20 to complete the positioning of the clamping assembly 10, and then one surface of the workpiece 200 can be processed. When the other surface of the workpiece 200 needs to be processed, it is only necessary to flip the clamping assembly 10, without disassembling the workpiece 200, reducing labor intensity, reducing the number of installation and disassembly of the workpiece 200, and thus reducing the probability of damage to the workpiece 200 during the disassembly process. Both sides of the workpiece 200 can be processed by a set of fixtures, reducing costs.

[0095] The working process of the positioning fixture 100 provided in the embodiment of the present application is roughly as follows:

[0096] First, open the cover plate 11 and install the workpiece 200 on the base plate 12. During installation, the second surface 2022 of the workpiece 200 is oriented toward the second processing window 121. The workpiece 200 is limited by the limiting member 13 abutting against the outer wall 2011 of the outer frame 201, and the second side 2014 of the outer frame 201 abuts against the second limiting ring 15. The second limiting portion 151 on the second limiting ring 15 abuts against the inner wall 2012 of the outer frame 201 to achieve positioning of the workpiece 200.

[0097] Then, the cover plate 11 is rotated so that the cover plate 11 covers the bottom plate 12, and the first positioning column 123 is inserted into the first positioning hole 112 to position the cover plate 11. When the cover plate 11 covers the bottom plate 12, the first magnetic member 113 and the second magnetic member 124 attract each other, so that the cover plate 11 and the bottom plate 12 are combined together. At this time, the second limiting ring 15 abuts against the first side 2013 of the outer frame 201, and the second limiting portion 151 abuts against the inner wall 2012 of the outer frame 201, completing the clamping and positioning of the workpiece 200. At this time, the first processing window 111 exposes the first surface 2021 of the inner plate 202, and the second processing window 121 exposes the second surface 2022 of the inner plate 202.

[0098] When it is necessary to process the first surface 2021 of the inner plate 202, the bottom plate 12 is placed on the base 21, and the second positioning column 25 is inserted into the second positioning hole 125 to realize the positioning of the bottom plate 12. When the bottom plate 12 is completely placed on the base 21, the avoidance groove 122 avoids the cover plate support block 24, and the bottom plate 12 abuts against the bottom plate support block 23. At this time, the support member 22 abuts against the second surface 2022 of the inner plate 202. Then, the positioning fixture 100 can be placed in the external processing equipment to process the first surface 2021 of the inner plate 202.

[0099] When it is necessary to process the second surface 2022 of the inner plate 202, the clamping assembly 10 is removed from the base 21 and turned over to place the cover plate 11 on the base 21, and the cover plate 11 is positioned by inserting the second positioning column 25 into the third positioning hole 114. When the cover plate 11 is completely placed on the base 21, the cover plate 11 abuts against the cover plate support block 24. At this time, the support member 22 abuts against the first surface 2021 of the inner plate 202. Then, the positioning fixture 100 can be placed in the external processing equipment to process the second surface 2022 of the inner plate 202.

[0100] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A positioning fixture for positioning a workpiece, the workpiece comprising an outer frame and an inner plate connected to the outer frame, the inner plate being at different distances from two opposite outer sides of the outer frame, characterized in that: The positioning fixture includes: A material clamping assembly, comprising a cover plate and a bottom plate hinged to the cover plate, the cover plate covers the bottom plate to cooperate with the bottom plate to clamp the workpiece, the cover plate is provided with a first processing window, a second processing window is provided on the bottom plate at a position corresponding to the first processing window, and a plurality of avoidance grooves surrounding the second processing window are provided on a side of the bottom plate away from the cover plate; and A positioning assembly is used to carry the clamping assembly, the positioning assembly comprises a base, a support member, a plurality of bottom plate support blocks and a plurality of cover plate support blocks, the base has a bearing surface, the support member, a plurality of bottom plate support blocks and a plurality of cover plate support blocks are all arranged on the bearing surface, a plurality of bottom plate support blocks and a plurality of cover plate support blocks are all arranged around the support member, the distance between the support member and the bearing surface is greater than the distance between the cover plate support block and the bearing surface, and the distance between the cover plate support block and the bearing surface is greater than the distance between the bottom plate support block and the bearing surface; wherein, The plurality of cover plate support blocks are respectively arranged corresponding to the plurality of avoidance grooves; when the cover plate and the base plate clamp the workpiece, the sum of the distance between the inner plate and the base plate away from the cover plate side and the distance between the base plate support block and the bearing surface is equal to the distance between the support member and the bearing surface, when the base plate is placed on the base, the base plate support block supports the base plate, and the support member supports the inner plate; the sum of the distance between the inner plate and the cover plate away from the base plate side and the distance between the cover plate support block and the bearing surface is equal to the distance between the support member and the bearing surface, when the cover plate is placed on the base, the cover plate support block supports the cover plate, and the support member supports the inner plate.

2. The positioning fixture according to claim 1, characterized in that: The clamping assembly also includes a plurality of limiting members that are all connected to the base plate and are arranged around the second processing window. When the cover plate and the base plate clamp the workpiece, the plurality of limiting members abut against the outer wall of the outer frame to limit the workpiece.

3. The positioning fixture according to claim 2, characterized in that: The position limiting member comprises a fixing pin and a flexible sleeve arranged outside the fixing pin, the fixing pin is fixedly connected to the bottom plate, and the flexible sleeve is in flexible contact with the workpiece.

4. The positioning fixture according to claim 1, characterized in that: The clamping assembly also includes a first limiting ring and a second limiting ring. The first limiting ring is arranged on a side of the cover plate close to the base plate and surrounds the first processing window. The second limiting ring is arranged on a side of the base plate close to the cover plate and surrounds the second processing window. The first limiting ring and the second limiting ring cooperate with each other to clamp the outer frame when the cover plate covers the base plate.

5. The positioning fixture according to claim 4, characterized in that: A first limiting portion is provided on the side of the first limiting ring facing the base plate, and the first limiting portion is arranged around the inner side of the first limiting ring; a second limiting portion is provided on the side of the second limiting ring facing the cover plate, and the second limiting portion is arranged around the inner side of the second limiting ring; when the cover plate covers the base plate, the first limiting portion and the second limiting portion both abut against the inner wall of the outer frame to limit the workpiece.

6. The positioning fixture according to claim 1, characterized in that: A plurality of first positioning columns are arranged on one side of the base plate close to the cover plate, and a plurality of first positioning holes corresponding to the first positioning columns are opened on one side of the cover plate close to the base plate. When the cover plate covers the base plate, the first positioning columns are inserted into the corresponding first positioning holes to position the cover plate.

7. The positioning fixture according to claim 1, characterized in that: A plurality of first magnetic parts are arranged on one side of the cover plate close to the base plate, and a plurality of second magnetic parts corresponding to the first magnetic parts are arranged on one side of the base plate close to the cover plate. When the cover plate is covered on the base plate, the first magnetic parts and the second magnetic parts attract each other to fix the cover plate and the base plate.

8. The positioning fixture according to claim 1, characterized in that: A first inclined surface surrounding the first processing window is disposed on a side of the cover plate away from the bottom plate, and a second inclined surface surrounding the second processing window is disposed on a side of the bottom plate away from the cover plate.

9. The positioning fixture according to claim 1, characterized in that: The base is also provided with a plurality of second positioning columns, the bottom plate is provided with a plurality of second positioning holes corresponding to the second positioning columns, and the cover plate is provided with a plurality of third positioning holes corresponding to the second positioning columns. When the bottom plate is placed on the base, the second positioning columns are inserted into the second positioning holes to position the bottom plate, and when the cover plate is placed on the base, the second positioning columns are inserted into the third positioning holes to position the cover plate.

10. The positioning fixture according to claim 1, characterized in that: A plurality of limiting protrusions are also arranged on the base, and the plurality of limiting protrusions are used to abut against the bottom plate or the cover plate to limit the bottom plate or the cover plate when the bottom plate or the cover plate is placed on the base.

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