Thin-wall frame detection clamp machining method

Abstract

The invention provides a thin-wall frame detection clamp machining method. The thin-wall frame detection clamp machining method comprises the following steps that an inner pressing block assembly corresponding to the inner side wall of a thin-wall frame and an outer pressing block assembly corresponding to the outer side wall of the thin-wall frame are arranged; the inner pressing block assembly is moved to a calibration position and fixed; and the side face, facing one side of the outer pressing block assembly corresponding to the inner pressing block assembly, of the inner pressing block assembly is machined through CNC to form a datum plane. According to the method, after the inner pressing block assembly is assembled and moved to a calibration position, the side face, facing one side of the outer pressing block assembly corresponding to the inner pressing block assembly, of the inner pressing block assembly is made to form a reference face through CNC, namely, numerical control machining equipment, and the reference face is the face, attached to the inner side wall of the thin-wall frame, of the inner pressing block assembly; therefore, the accumulated error of the inner pressing block assembly can be eliminated, and the precision of the detection clamp is improved.

Description

Technical Field

[0001] This invention relates to the field of fixture technology, and in particular to a method for processing a thin-walled frame inspection fixture. Background Technology

[0002] Closed-loop thin-walled frames are commonly used in consumer electronics, such as battery frames, as components. Before being manufactured into finished products, they require testing, which necessitates fixing the thin-walled frame in a fixture. However, due to the low strength of the thin-walled frame and the high precision requirements of the testing, traditional fixtures inevitably accumulate errors during the production and assembly process, making it difficult to guarantee the required accuracy. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for processing a thin-walled frame inspection fixture, which can effectively ensure the accuracy of the inspection fixture.

[0004] The embodiments of the present invention are achieved through the following technical solutions: A method for manufacturing a thin-walled frame inspection fixture includes the following steps: Step S1: Configure the inner pressure block assembly corresponding to the inner side wall of the thin-walled frame, and the outer pressure block assembly corresponding to the outer side wall of the thin-walled frame; Step S2: Move the inner pressure block assembly to the calibrated position and fix it; Step S3: CNC machine the side of the inner pressure block assembly facing the corresponding outer pressure block assembly to form a reference surface.

[0005] According to a preferred embodiment, in step S3, the CNC machining path is consistent with the circumferential contour of the inner sidewall of the thin-walled frame.

[0006] According to a preferred embodiment, after step S3, the method further includes: Step S4: Perform dimensional inspection of the CNC-machined inner pressure block assembly from FAI-1 to FAI-45.

[0007] According to a preferred embodiment, the testing fixture includes a lower base plate, a mounting base plate, and a middle frame. The upper end of the middle frame is provided with a bearing surface for placing a thin-walled frame. An assembly hole is provided in the middle of the bearing surface, extending from top to bottom through the middle frame. The mounting base plate is mounted on the middle frame and located below the assembly hole. The middle frame is mounted on the lower base plate. The inner pressure block assembly includes multiple inner pressure heads, each located within the assembly hole and mounted on the mounting base plate. The multiple inner pressure heads are spaced apart circumferentially along the thin-walled frame. At least some of the inner pressure heads are capable of radial movement along the thin-walled frame. Each inner pressure head has an inner flange, which is located above the bearing surface in the vertical direction. The outer pressure block assembly includes multiple outer pressure heads, which are spaced apart circumferentially along the thin-walled frame. The outer pressure heads are mounted on the middle frame and are capable of radial movement along the thin-walled frame.

[0008] According to a preferred embodiment, the inner pressure head includes a reference pressure head and a movable pressure head, the reference pressure head being fixedly installed on the mounting base plate, and the movable pressure head being adjustablely disposed on the mounting base plate.

[0009] According to a preferred embodiment, the movable pressure head includes a pull plate, an extension block, and an inner top plate. The pull plate is slidably mounted on the mounting base plate, the extension block is mounted on the pull plate and located within the assembly hole, the inner top plate is mounted on the top of the extension block, and the inner flange is disposed on the inner top plate. An avoidance hole is provided on the inner wall of the assembly hole, the avoidance hole penetrating the side wall of the middle frame radially, and the pull plate extends into the avoidance hole. A first driving member is mounted on the lower base plate, and the first driving member acts on the pull plate to enable it to slide relative to the lower base plate.

[0010] According to a preferred embodiment, the external pressure head includes a push block and a return spring. The push block is slidably connected to the middle frame, and the return spring acts on the push block to make the push block have a tendency to move away from the thin-walled frame in the radial direction. A second driving member is disposed on the lower base plate, and the second driving member is used to drive the push block to move towards the thin-walled frame in the radial direction.

[0011] According to a preferred embodiment, the middle frame is provided with a plurality of guide grooves corresponding one-to-one with the plurality of external pressure heads along the radial direction of the thin-walled frame. The push block is slidably installed in the guide groove. The reset spring is located between the inner wall of the guide groove near the thin-walled frame and the push block. The second driving member is provided correspondingly to the push block.

[0012] According to a preferred embodiment, the push block is at least partially higher than the bearing surface, and the structure of the push block above the bearing surface constitutes an outer flange corresponding to the inner flange.

[0013] According to a preferred embodiment, a pressure plate is mounted on the middle frame, the pressure plate spanning the guide groove; the outer flange is located between the pressure plate and the thin-walled frame. When the detection fixture is not in use, the reset spring acts on the push block to move it toward the pressure plate, so that the outer flange abuts against the pressure plate.

[0014] According to a preferred embodiment, a transfer block is slidably mounted on the lower base plate. The transfer block is located between the second driving member and the push block corresponding to the second driving member. The second driving member is used to drive the transfer block to move toward the push block. A driving protrusion is provided on one side of the transfer block facing the push block. The driving protrusion can be embedded in the guide groove. The width of the transfer block is greater than the width of the guide groove.

[0015] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects: In the testing fixture of the present invention, the inner pressure block assembly, which serves as the reference, is prone to accumulating errors during the production and assembly process, and is the main source of errors in the testing fixture. Therefore, during the production process of the testing fixture, after the inner pressure block assembly is assembled and moved to the calibration position, the side of the inner pressure block assembly facing the corresponding outer pressure block assembly is formed as a reference surface by using a CNC machining equipment. This reference surface is the surface where the inner pressure block assembly is in contact with the inner sidewall of the thin-walled frame, thereby eliminating the accumulated errors of the inner pressure block assembly and improving the accuracy of the testing fixture. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart of the detection fixture processing method provided in the embodiments of the present invention; Figure 2 This is a three-dimensional structural diagram of the detection fixture provided in an embodiment of the present invention; Figure 3 This is a top view of the detection fixture provided in an embodiment of the present invention; Figure 4 An exploded view of the detection fixture provided in an embodiment of the present invention; Figure 5An exploded view of the assembly structure of the middle frame, inner pressure block assembly and mounting base plate provided in an embodiment of the present invention. Icons: 1-Lower base plate, 11-First driving component, 111-Pull rod, 12-Second driving component, 13-Assembly slot, 14-Transfer block, 141-Drive protrusion, 2-Middle frame, 21-Bearing surface, 22-Assembly hole, 221-Allowing hole, 23-Mounting hole, 24-First limit rod, 25-Guide groove, 26-Pressure plate, 3-Mounting base plate, 4-Inner pressure block assembly, 41-Inner pressure head, 410-Inner flange, 411-Reference pressure head, 412-Moving pressure head, 4121-Pull plate, 41211-Adjustment hole, 4122-Extension block, 4123-Inner top plate, 5-Outer pressure block assembly, 51-Outer pressure head, 511-Push block, 5111-Outer flange, 512-Reset spring. Detailed Implementation

[0018] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0021] Please refer to Figures 1 to 5 A method for processing a thin-walled frame inspection fixture includes the following steps: Step S1: Configure the inner pressure block assembly 4 corresponding to the inner side wall of the thin-walled frame, and the outer pressure block assembly 5 corresponding to the outer side wall of the thin-walled frame; Step S2: Move the inner pressure block assembly 4 to the calibrated position and fix it; Step S3: The side of the inner pressure block assembly 4 facing the corresponding outer pressure block assembly 5 is machined by CNC to form a reference surface.

[0022] like Figure 4 and Figure 5As shown, in this embodiment, a closed square ring-shaped thin-walled frame (not shown in the figure) is used as an example for explanation. The thin-walled frame has an inner wall and an outer wall. In use, the inner pressure block assembly 4 acts on the inner wall of the thin-walled frame, and the outer pressure block assembly 5 acts on the outer wall of the thin-walled frame. The inner pressure block assembly 4 serves as a reference and is attached to the inner wall of the thin-walled frame. The outer pressure block assembly 5 applies pressure from the outer wall of the thin-walled frame to the inner wall of the thin-walled frame to cooperate with the inner pressure block assembly 4 to clamp and fix the thin-walled frame. The inner pressure block assembly 4, serving as the reference, is prone to accumulating errors during production and assembly, becoming a major source of error in the inspection fixture. Therefore, during the production of the inspection fixture, after assembling the inner pressure block assembly 4 and moving it to the calibration position, a CNC (Computer Numerical Control) machining machine is used to form a reference surface on the side of the inner pressure block assembly 4 facing the corresponding outer pressure block assembly 5. This reference surface is the surface where the inner pressure block assembly 4 fits against the inner wall of the thin-walled frame, thereby eliminating the accumulated error of the inner pressure block assembly 4 and improving the accuracy of the inspection fixture. In this embodiment, the calibration position is the position of the inner pressure block assembly 4 when the inspection fixture is clamping the thin-walled frame. At this time, the end of the inner pressure block assembly 4 facing the corresponding outer pressure block assembly 5 has structural allowance, which can be removed by precision machining using a CNC machine tool.

[0023] Furthermore, in step S3, the CNC machining path is consistent with the circumferential contour of the inner sidewall of the thin-walled frame.

[0024] In this embodiment, after step S3, step S4 is also included: performing FAI-1 to FAI-45 dimensional inspection on the CNC-machined inner pressure block assembly 4 to ensure the reliability of the inspection fixture.

[0025] In this embodiment, the inner pressure block assembly 4 includes a plurality of inner pressure heads 41, at least some of which are capable of radial movement along the thin-walled frame. The movable inner pressure heads 41 facilitate loading and unloading of the thin-walled frame.

[0026] Furthermore, the outer pressure block assembly 5 includes multiple outer pressure heads 51, which are capable of moving radially along the thin-walled frame. The outer pressure heads 51 are used to cooperate with the inner pressure head 41 to clamp the thin-walled frame. At the same time, the outer pressure heads 51 are movable, which facilitates the loading and unloading of the thin-walled frame and allows the testing fixture to adapt to the production needs of thin-walled frames with different wall thicknesses.

[0027] In this embodiment, the testing fixture also includes a lower base plate 1, a mounting base plate 3, and a middle frame 2. The upper end of the middle frame 2 is provided with a bearing surface 21 for placing the thin-walled frame. The middle of the bearing surface 21 is provided with an assembly hole 22, which penetrates the middle frame 2 from top to bottom. The mounting base plate 3 is mounted on the middle frame 2 and is located at the lower end of the assembly hole 22. The middle frame 2 is mounted on the lower base plate 1. The inner pressure head 41 is located in the assembly hole 22 and is mounted on the mounting base plate 3. Multiple inner pressure heads 41 are spaced apart circumferentially along the thin-walled frame. At least some of the inner pressure heads 41 can move radially along the thin-walled frame. The inner pressure head 41 has an inner flange 410. In the vertical direction, the inner flange 410 is located on the upper side of the bearing surface 21. Multiple outer pressure heads 51 are spaced apart circumferentially along the thin-walled frame. The outer pressure heads 51 are mounted on the middle frame 2 and can move radially along the thin-walled frame. In this embodiment, the inner pressure head 41, which moves radially along the thin-walled frame, is slidably mounted on the mounting base plate 3 via a slide rail slider assembly to ensure a stable and controllable running trajectory.

[0028] Furthermore, the lower base plate 1 is provided with an assembly groove 13, and the middle frame 2 is embedded in the assembly groove 13.

[0029] In this embodiment, as Figure 5 As shown, the inner pressure head 41 includes a reference pressure head 411 and a movable pressure head 412. The reference pressure head 411 is fixedly installed on the mounting base plate 3, and the movable pressure head 412 is adjustablely mounted on the mounting base plate 3. Specifically, the movable pressure head 412 is the aforementioned inner pressure head 41 capable of moving radially along the thin-walled frame. The reference pressure head 411 is fixedly installed and serves as a reference for the movable pressure head 412. The movable assembly of the movable pressure head 412 facilitates the loading and unloading of the thin-walled frame. In use, the movable pressure head 412 moves radially inward along the thin-walled frame, and after the thin-walled frame is fitted onto the movable pressure head 412 and the reference pressure head 411, the inner sidewall of the thin-walled frame is pressed against the reference pressure head 411. Then, the movable pressure head 412 moves radially outward along the thin-walled frame until it is pressed against the inner sidewall of the thin-walled frame.

[0030] In this embodiment, the movable pressure head 412 includes a pull plate 4121, an extension block 4122, and an inner top plate 4123. The pull plate 4121 is slidably mounted on the mounting base plate 3 via a slide rail slider assembly. The extension block 4122 is mounted on the pull plate 4121 and is located in the assembly hole 22. The inner top plate 4123 is mounted on the top of the extension block 4122. The inner flange 410 is disposed on the inner top plate 4123. An obstacle clearance hole 221 is provided on the inner wall of the mounting hole 22. The obstacle clearance hole 221 penetrates the side wall of the middle frame 2 radially, and the pull plate 4121 extends into the obstacle clearance hole 221. A first driving member 11 is mounted on the lower base plate 1. The first driving member 11 acts on the pull plate 4121 so that it can slide relative to the mounting base plate 3. Here, the first driving member 11 is a cylinder. The number of first driving members 11 is the same as the number of movable pressure blocks, and they are arranged in a one-to-one correspondence. In this embodiment, the first driving member 11 is connected to the pull plate 4121 through the pull rod 111 to drive the pull plate 4121, i.e., the movable pressure head 412, to move.

[0031] like Figure 4 and Figure 5 As shown, a mounting hole 23 is provided through the middle frame 2, which connects to a corresponding clearance hole 221. A first limiting rod 24 is installed in the mounting hole 23. An adjustment hole 41211 is provided on the pull plate 4121, and the lower end of the first limiting rod 24 is embedded in the adjustment hole 41211. It can be understood that the number of first limiting rods 24 is the same as the number of movable pressure heads 412, and they are set one-to-one with the movable pressure heads 412. The first limiting rod 24 is installed on the middle frame 2, extends through the mounting hole 23 to the adjustment hole 41211, and there is a gap between the hole wall of the adjustment hole 41211 and the first limiting rod 24 in the corresponding direction of movement of the movable pressure head 412, so that the movable pressure head 412 can move within a certain space. The first limiting rod 24, together with the adjustment hole 41211, can prevent the movable pressure head 412 from over-pressing the thin-walled frame, thus improving the safety of the testing fixture.

[0032] like Figure 4 As shown, the external pressure head 51 includes a push block 511 and a return spring 512. The push block 511 is slidably connected to the middle frame 2. The return spring 512 acts on the push block 511, causing the push block 511 to have a tendency to move away from the thin-walled frame in the radial direction. A second driving member 12 is disposed on the lower base plate 1. The second driving member 12 is used to drive the push block 511 to move towards the thin-walled frame in the radial direction. Here, the second driving member 12 is downstream of the direction of the push block 511's movement tendency to overcome the movement tendency of the push block 511 and push it to move in the opposite direction of the movement tendency, that is, towards the thin-walled frame. During this process, the return spring 512 is in a compressed state, which can eliminate the positional error of the push block 511 in the direction of movement. When the thin-walled frame is unloaded, the second driving member 12 resets, and the return spring 512 acts on the push block 511 to make it detach from the outer wall of the thin-walled frame and reset.

[0033] like Figure 4 and Figure 5As shown, the middle frame 2 has multiple guide grooves 25 arranged radially along the thin-walled frame, each corresponding to a plurality of external pressure heads 51. Push blocks 511 are slidably installed within the guide grooves 25. A return spring 512 is located between the inner wall of the guide groove 25 near the thin-walled frame and the push block 511. A second driving member 12 is correspondingly arranged with the push block 511. In this embodiment, the push block 511 is at least partially higher than the bearing surface 21, and the structure of the push block 511 above the bearing surface 21 constitutes an outer flange 5111 corresponding to the inner flange 410. In use, the outer flange 5111 cooperates with the inner flange 410 to limit and clamp the sidewall of the thin-walled frame, achieving positioning.

[0034] In this embodiment, a pressure plate 26 is mounted on the middle frame 2 to limit the push block 511. The pressure plate 26 spans the guide groove 25 and is used to limit the push block 511. Specifically, the pressure plate 26 is used to prevent the push block 511, i.e., the outer pressure head 51, from disengaging from the guide groove 25. Further, the outer flange 5111 is located between the pressure plate 26 and the thin-walled frame. When the detection fixture is not in use, the return spring 512 acts on the push block 511, causing it to move toward the pressure plate 26, so that the push block 511, specifically the outer flange 5111, abuts against the pressure plate 26. Figures 2 to 4 As shown, a transfer block 14 is slidably mounted on the lower base plate 1 via a slide rail slider assembly. The transfer block 14 is positioned between the second driving member 12 and the push block 511 corresponding to the second driving member 12. The second driving member 12 drives the transfer block 14 to move toward the push block 511. A driving protrusion 141 is provided on the side of the transfer block 14 facing the push block 511. The driving protrusion 141 can be embedded in the guide groove 25, and the width of the transfer block 14 is greater than the width of the guide groove 25. It can be understood that the number of transfer blocks 14 is the same as the number of first driving members 11, and they are arranged in a one-to-one correspondence. The second driving member 12 is a cylinder, which applies force to the push block 511 through the transfer block 14. The driving protrusion 141 can extend into the guide groove 25 to effectively drive the push block 511. The fact that the width of the transfer block 14 is greater than the width of the guide groove 25 effectively prevents the push block 511, i.e., the external pressure head 51, from over-pressing the thin-walled frame, thus improving safety.

[0035] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A thin-walled frame body detection jig processing method characterized by, Includes the following steps: Step S1: Configure the inner pressure block assembly corresponding to the inner side wall of the thin-walled frame, and the outer pressure block assembly corresponding to the outer side wall of the thin-walled frame; Step S2: Move the inner pressure block assembly to the calibrated position and fix it; Step S3: CNC machine the side of the inner pressure block assembly facing the corresponding outer pressure block assembly to form a reference surface.

2. The method for processing a thin-walled frame inspection fixture according to claim 1, characterized in that, In step S3, the CNC machining path is consistent with the circumferential contour of the inner sidewall of the thin-walled frame.

3. The method for processing a thin-walled frame inspection fixture according to claim 1, characterized in that, After step S3, the method further includes: Step S4: Perform dimensional inspection of the CNC-machined inner pressure block assembly from FAI-1 to FAI-45.

4. The method for processing a thin-walled frame inspection fixture according to claim 1, characterized in that, The testing fixture includes a lower base plate, a mounting base plate, and a middle frame. The upper end of the middle frame is provided with a bearing surface for placing a thin-walled frame. The middle of the bearing surface is provided with an assembly hole that runs through the middle frame from top to bottom. The mounting base plate is assembled to the middle frame and is located at the lower end of the assembly hole. The middle frame is mounted to the lower base plate. The inner pressure block assembly includes multiple inner pressure heads, which are located in the assembly hole and mounted on the mounting base plate. The multiple inner pressure heads are spaced apart circumferentially along the thin-walled frame. At least some of the inner pressure heads are capable of radial movement along the thin-walled frame. Each inner pressure head has an inner flange, which is located on the upper side of the bearing surface in the vertical direction. The external pressure block assembly includes multiple external pressure heads, which are spaced apart circumferentially along the thin-walled frame. The external pressure heads are mounted on the middle frame and are capable of radial movement along the thin-walled frame.

5. The method for processing a thin-walled frame inspection fixture according to claim 4, characterized in that, The inner pressure head includes a reference pressure head and a movable pressure head. The reference pressure head is fixedly installed on the mounting base plate, and the movable pressure head is adjustablely set on the mounting base plate.

6. The method for processing a thin-walled frame inspection fixture according to claim 5, characterized in that, The movable pressure head includes a pull plate, an extension block, and an inner top plate. The pull plate is slidably mounted on the mounting base plate. The extension block is mounted on the pull plate and located within the assembly hole. The inner top plate is mounted on the top of the extension block, and the inner flange is disposed on the inner top plate. The inner wall of the assembly hole is provided with a clearance hole, which penetrates the side wall of the middle frame radially, and the pull plate extends into the clearance hole; A first driving member is mounted on the lower base plate, and the first driving member acts on the pull plate so that it can slide relative to the lower base plate.

7. The method for processing a thin-walled frame inspection fixture according to claim 4, characterized in that, The external pressure head includes a push block and a return spring. The push block is slidably connected to the middle frame, and the return spring acts on the push block so that the push block has a tendency to move away from the thin-walled frame in the radial direction of the thin-walled frame. A second driving member is disposed on the lower base plate. The second driving member is used to drive the push block to move radially toward the thin-walled frame.

8. The method for processing a thin-walled frame inspection fixture according to claim 7, characterized in that, The middle frame is provided with a plurality of guide grooves along the radial direction of the thin-walled frame, which correspond one-to-one with the plurality of external pressure heads. The push block is slidably installed in the guide groove. The reset spring is located between the inner wall of the guide groove near the thin-walled frame and the push block. The second driving component is configured correspondingly to the push block.

9. The method for processing a thin-walled frame inspection fixture according to claim 8, characterized in that, The pusher block is at least partially higher than the bearing surface, and the structure of the pusher block above the bearing surface forms an outer flange corresponding to the inner flange.

10. The method for processing a thin-walled frame inspection fixture according to claim 9, characterized in that, A pressure plate is mounted on the middle frame, and the pressure plate spans the guide groove. The outer flange is located between the pressure plate and the thin-walled frame. When the detection fixture is not in use, the return spring acts on the push block to move it toward the pressure plate so that the outer flange abuts against the pressure plate.

11. The method for processing a thin-walled frame inspection fixture according to claim 8, characterized in that, A transfer block is slidably mounted on the lower base plate. The transfer block is located between the second driving member and the push block corresponding to the second driving member. The second driving member is used to drive the transfer block to move toward the push block. The transfer block has a driving protrusion on one side facing the push block. The driving protrusion can be embedded in the guide groove. The width of the transfer block is greater than the width of the guide groove.

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