An auxiliary positioning device for machining

Abstract

The utility model discloses a kind of auxiliary positioning devices for machining, it is related to machining auxiliary equipment field, including horizontal slide positioning assembly, support plate assembly, compression assembly and the overturning connection component for numerical control machine tool assembly, support plate assembly is installed on overturning connection component, horizontal slide positioning assembly is connected in the bottom of support plate assembly, compression assembly is connected above support plate assembly.The utility model is through the setting of multi-hole structure, the synchronous working operation of multiple workpieces to be machined is realized, and the processing efficiency is effectively improved;And automatic clamping, positioning is stable firm, through rotation realizes once positioning double-sided processing, eliminates repeated clamping error, improves processing precision, guarantees processing quality.

Description

Technical Field

[0001] This utility model relates to the field of machining auxiliary equipment, and in particular to an auxiliary positioning device for machining. Background Technology

[0002] Existing technology involves machining the mounting base for support and positioning using CNC machine tools, mostly employing manual loading and unloading operations. The positioning fixtures are simple in structure and are directly fixed to the worktable during use. While they can simultaneously position multiple parts, they cannot rotate, limiting their functionality. This operating method allows for the processing of 4-5 products per loading / unloading cycle, requiring frequent switching of the CNC machine tool, resulting in low overall work efficiency, short effective machine operating time, and constant operator monitoring.

[0003] How to provide a novel auxiliary positioning device for machining that achieves automated, stable, and secure positioning through a multi-cavity structure, thereby effectively improving machining efficiency, has become a technical challenge that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary positioning device for machining, which solves the problem of low machining efficiency listed in the background art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This utility model discloses an auxiliary positioning device for machining, comprising a horizontal slider positioning assembly, a support plate assembly, a clamping assembly, and a flipping connection assembly. The support plate assembly is mounted on the flipping connection assembly, the horizontal slider positioning assembly is connected to the bottom of the support plate assembly, and the clamping assembly is connected to the top of the support plate assembly.

[0006] Preferably, the support plate assembly includes a bridge plate, a first cover plate, a second cover plate, and a small cover plate. One side of the bridge plate is bolted to the flip connection assembly, and the other side of the bridge plate has a plurality of positioning holes that match the workpiece to be processed. The horizontal slider positioning assembly is installed in the mounting groove of the bridge plate and is positioned by being covered by the first cover plate and the second cover plate. The small cover plate is connected above the outside of the mounting groove of the bridge plate to restrict the movement of the horizontal slider positioning assembly.

[0007] Preferably, the positioning cavity is configured as a through positioning hole, and an insert is connected to the side wall of the positioning hole; the exposed side shape of the insert matches the shape of the workpiece to be processed.

[0008] Preferably, the horizontal slider positioning assembly includes a slider cylinder, a wedge-shaped tie rod, a small slider, and a large slider. The slider cylinder is installed at the bottom of the bridge plate. The driving end of the wedge-shaped tie rod is connected to the slider cylinder tie rod of the slider cylinder. An inclined groove that cooperates with the small slider and the large slider is provided on the upper part of the wedge-shaped tie rod. A positioning post is provided at the center of the top end of the wedge-shaped tie rod. The positioning post is connected through a through hole in the first cover plate or the second cover plate. The small slider and the large slider are arranged in pairs and located on the inner and outer sides. The side of the small slider and the large slider closer to the positioning cavity is the working side, and the shape of the working side matches the shape of the workpiece to be processed.

[0009] Preferably, protective blocks are connected to the working sidewalls of the small slider and the large slider, and the protective blocks are made of flexible material.

[0010] Preferably, the clamping assembly includes a clamping cylinder, a pressure rod, and pressure blocks. One end of the clamping cylinder is hinged to the bridge plate via a fixed bracket. A connecting arm is hinged to the telescopic rod end of the clamping cylinder. Meanwhile, the fixed end of the pressure rod is hinged to the bridge plate via a connecting arm fixing seat. The other end of the connecting arm is positioned and connected to two pressure blocks via the pressure rod. The position of the pressure block corresponds one-to-one with the position of the positioning cavity.

[0011] Preferably, the flipping connection assembly is rotatably connected to the turntable, the turntable is positioned on the worktable of the CNC machine tool, and the drive shaft inside the turntable drives the workpiece on the bridge plate to flip and complete double-sided processing after starting.

[0012] Preferably, the flip connection assembly includes a flange, one side of which is fixedly connected to the bridge plate via a flange connecting plate, and reinforcing side support plates are provided between the bottom two sides of the bridge plate and the flange connecting plate; a bushing for connecting to the drive shaft inside the turntable is provided at the center of the flange.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This utility model provides an auxiliary positioning device for machining. When in use, it works in conjunction with the material bin and robot arm inside the machine tool. By using the robot arm to pick up and put down parts, the loading and unloading path and time are shortened. Hundreds or thousands of products can be processed with one opening and closing of the machine tool door, effectively improving processing efficiency, extending the effective working time of the machine tool, and reducing the real-time monitoring time of the operator. It also allows the operator to supervise the operation of multiple machine tools at the same time.

[0014] 1) Multiple positioning holes are opened on the bridge plate, which realizes the simultaneous clamping, positioning and processing of multiple parts to be processed, reducing clamping time and improving processing effect; at the same time, it greatly ensures the stability and interchangeability of the size and shape of the whole batch of parts. 2) Through the cooperation of the clamping component and the horizontal slider positioning component, the workpiece is positioned first and then clamped. The robot pushes the workpiece to the positioning cavity, and the clamping component applies downward force to make it accurately fit with the support surface in the positioning cavity. Then, the smooth block positioning component achieves clamping and positioning on all four sides to ensure stability during machining. Both components are driven by cylinders to realize automated clamping and clamping operations. Each workpiece is positioned with the same reference, which ensures extremely high consistency and interchangeability of the machining dimensions of the entire batch of workpieces and eliminates the uncertainty and random error of human operation positioning. 3) This horizontal slider positioning assembly achieves self-centering functionality. Driven synchronously by a wedge-shaped tie rod, it precisely controls the slider's stroke and final position. The cover plate guides the slider's movement, providing a highly consistent and precise physical reference for each workpiece, ensuring the consistency and stability of the clamping state. Simultaneously, the cover plate seals the bottom wedge-shaped tie rod, preventing dust and chips, ensuring the cleanliness of the internal sliding connection, and extending its service life. 4) The design of the flip connection component and turntable enables the flipping operation of the bridge plate and all components and workpieces above it. After the front feature is processed, the tool rises away from the workpiece. After the drive shaft in the turntable is started, it drives the bridge plate and the workpiece to be processed to flip 180°, turning the bottom surface into the top surface. After the tool falls down, it continues to process, thus completing the double-sided processing of the workpiece. Double-sided processing can be completed in one loading, fundamentally eliminating repeated clamping errors, thereby obtaining unparalleled precision and consistency, while greatly improving efficiency.

[0015] In summary, this utility model has an ingenious design and compact layout. The multi-cavity structure enables simultaneous processing of multiple workpieces, effectively improving processing efficiency. Furthermore, the automatic clamping and stable positioning, along with the rotation for single-position double-sided processing, eliminate repeated clamping errors, improve processing accuracy, and ensure processing quality. In conjunction with a robotic arm, it achieves fully automated operation of loading, processing, and unloading, saving time and effort. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a front view of the auxiliary positioning device for machining according to this utility model; Figure 2 This is a side view of the auxiliary positioning device for machining according to this utility model; Figure 3 This is a top view of the auxiliary positioning device for machining according to this utility model; Figure 4 This is a bottom view of the auxiliary positioning device for machining according to this utility model; Figure 5 This utility model Figure 3 Enlarged view of a section at point F in the middle; Figure 6 This utility model Figure 3 Sectional view of position AA; Figure 7 This is an isometric view of the auxiliary positioning device for machining according to this utility model; Figure 8 This is a schematic diagram of the structure of the insert of this utility model; Figure 9 This is a schematic diagram of the utility model in use.

[0018] Explanation of reference numerals in the attached drawings: 1. Flip-over connection assembly; 101. Flange; 102. Bushing; 103. Flange connecting plate; 2. Horizontal slider positioning assembly; 201. Slider cylinder; 202. Wedge-shaped tie rod; 203. Small slider; 204. Protective block; 205. Large slider; 202-1. Slider cylinder tie rod; 3. Support plate assembly; 301. Side support plate; 302. Bridge plate; 303. First cover plate; 304. Second cover plate; 305. Small cover plate; 306. Insert; 4. Clamping assembly; 401. Clamping cylinder; 402. Fixed bracket; 403. Connecting arm; 404. Connecting arm fixing seat; 405. Pressure rod; 406. Pressure block; 5. Turntable; 6. Proximity sensor switch; 7. Hopper; 8. Cover plate; 9. Cover plate drive cylinder; 10. Worktable; 11. Material handling robot; 12. Material handling tray robot. Detailed Implementation

[0019] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] like Figure 1-8 As shown, an auxiliary positioning device for machining includes a horizontal slider positioning assembly 2, a support plate assembly 3, a clamping assembly 4, and a flip-connecting assembly 1 for CNC machine tool assembly. The support plate assembly 3 is mounted on the flip-connecting assembly 1, the horizontal slider positioning assembly 2 is connected to the bottom of the support plate assembly 3, and the clamping assembly 4 is connected to the top of the support plate assembly 3.

[0021] Specifically, in use, the workpiece to be processed is first placed in multiple positioning holes of the support plate assembly 3 by a material handling robot. Figure 1The diagram shows a four-cavity structure. The clamping assembly 4 applies downward force to press the workpiece into the positioning cavity and ensure it fits properly. The horizontal slider positioning assembly 2 clamps the sidewall of the workpiece after activation. Furthermore, an external PLC control center is included. The drive components of the horizontal slider positioning assembly 2 and the clamping assembly 4 are electrically connected to the PLC control center to achieve automated control.

[0022] like Figure 2-3 As shown, the support plate assembly 3 includes a bridge plate 302, a first cover plate 303, a second cover plate 304, and a small cover plate 305. One side of the bridge plate 302 is bolted to the flip connection assembly 1, and the other side of the bridge plate 302 has multiple positioning holes that match the workpiece to be processed. The horizontal slider positioning assembly 2 is installed in the mounting groove of the bridge plate 302 and is covered by the first cover plate 303 and the second cover plate 304 and then fixed in place by bolts. Preferably, the first cover plate 303 and the second cover plate 304 are symmetrically arranged. The small cover plate 305 is connected above and outside the mounting groove of the bridge plate 302 to restrict the movement of the horizontal slider positioning assembly 2. The support plate assembly 3 mainly provides support and positioning for other components and enables the transfer with the CNC machine tool.

[0023] Specifically, the positioning cavity is configured as a through positioning hole, and an insert 306 is connected to the side wall of the positioning hole; for example... Figure 8 As shown, the exposed side shape of the insert 306 matches the shape of the workpiece to be processed. The bottom of the insert 306 is square, and screw holes are provided at the four corners. The insert is fastened to the bridge plate 302 by bolts passing through the screw holes. The product placement position is set as multiple isolated points to facilitate the discharge of debris during processing.

[0024] like Figure 3-6As shown, the horizontal slider positioning assembly 2 includes a slider cylinder 201, a wedge-shaped pull rod 202, a small slider 203, and a large slider 205. The slider cylinder 201 is installed at the bottom of the bridge plate 302. The driving end of the wedge-shaped pull rod 202 is connected to the slider cylinder pull rod 202-1 of the slider cylinder 201. An inclined groove is provided above the wedge-shaped pull rod 202 to cooperate with the small slider 203 and the large slider 205. A positioning post is provided at the center of the top of the wedge-shaped pull rod 202. The positioning post is connected through the through hole of the first cover plate 303 or the second cover plate 304. The small slider 203 and the large slider 205 are arranged in pairs and located on the inner and outer sides. Since the inclined groove is symmetrically arranged in an inverted V shape, their movement directions are opposite. The side of the small slider 203 and the large slider 205 closest to the positioning cavity is the working side, and the shape of the working side matches the shape of the workpiece to be processed. Specifically, the positioning post enables top positioning of the wedge-shaped tie rod 202, improving the coaxiality and perpendicularity of the components after installation, resulting in smoother and more stable drive motion. The cover plate seals the mating parts of the internal wedge-shaped tie rod with the small and large sliders, providing dust and chip prevention, ensuring the cleanliness of the moving parts, ensuring smooth operation, and extending their service life.

[0025] In the non-working state, the small slider 203 and the large slider 205 are far apart, and the distance between their working sides is greater than the dimensions of the workpiece. At this time, the telescopic rod of the slider cylinder 201 is extended, and the top positioning post is exposed at a relatively high height. Once the workpiece is in place, it needs to be clamped. The PLC control center issues a command, and the slider cylinder 201 starts, driving the telescopic rod downwards. Through the inclined slide groove and the wedge plates on the small slider 203 and the large slider 205, the small slider 203 and the large slider 205 are pushed to move synchronously and move closer to each other, finally clamping the workpiece and achieving stable positioning during processing. After processing, the telescopic rod of the slider cylinder 201 rises, returning to the far-away state. After the workpiece is released from positioning, it can be removed by a robotic arm.

[0026] Specifically, protective blocks 204 are connected to the working side walls of the small slider 203 and the large slider 205. The protective blocks 204 are made of flexible material, preferably engineering plastic, to form flexible contact with the workpiece to be processed, ensuring clamping force while forming protection to avoid damage to the workpiece.

[0027] like Figure 2 , 5As shown, the clamping assembly 4 includes a clamping cylinder 401, a pressure rod 405, and pressure blocks 406. One end of the clamping cylinder 401 is hinged to the bridge plate 302 via a fixed bracket 402. A connecting arm 403 is hinged to the telescopic rod end of the clamping cylinder 401. Simultaneously, the fixed end of the pressure rod 405 is hinged to the bridge plate 302 via a connecting arm fixing seat 404. The other end of the connecting arm 403 is positioned and connected to two pressure blocks 406 via the pressure rod 405. The positions of the pressure blocks 406 correspond one-to-one with the positions of the positioning holes. Figure 9 As shown, the left side is the clamping state, which is performed before the horizontal slider positioning component 2 clamps; the right side is the non-clamping state, which is in the non-clamping state during CNC machining.

[0028] In use, after the workpiece is placed into the positioning cavity by the robotic arm, the clamping cylinder 401 receives a start command. The telescopic rod of the clamping cylinder 401 extends outward, passes through the connecting arm 403, and rotates downward after passing around the connecting arm fixing seat 404. This drives the pressure rod 405 and the pressure block 406 to press the workpiece completely downward into the positioning cavity. After clamping, the horizontal slider positioning assembly 2 starts and clamps the workpiece to complete the positioning operation before CNC machining. After positioning, the telescopic rod of the clamping cylinder 401 retracts, driving the connecting arm 403 to rotate in the opposite direction, returning to the non-clamping state. At this time, the CNC machining operation begins according to the corresponding program settings. This linkage structure is compact, runs stably, and realizes a one-to-two clamping operation, reducing the number of clamping cylinders 401 and thus reducing manufacturing costs. Specifically, the clamping cylinder 401 can be a self-locking cylinder to ensure the stability of the non-clamping state and ensure the safety of the machining operation.

[0029] Specifically, the flipping connection assembly 1 is rotatably connected to the turntable 5, which is positioned on the worktable 10 of the CNC machine tool. After the drive shaft within the turntable 5 is activated, it drives the workpiece on the bridge plate 302 to flip, completing double-sided processing. This flipping connection assembly 1 can be assembled with a single-sided two-cavity, four-cavity, or six-cavity structure, or with a symmetrically arranged four-cavity or eight-cavity structure. Figure 7 The diagram shown is a schematic of a single-sided four-cavity structure. The appropriate number of cavities can be selected according to the needs and actual requirements of the workpiece to be processed, with an even number being preferred.

[0030] Specifically, the flipping connection assembly 1 includes a flange 101. One side of the flange 101 is fixedly connected to the bridge plate 302 via a flange connecting plate 103. A reinforcing side support plate 301 is provided between the bottom two sides of the bridge plate 302 and the flange connecting plate 103. A bushing 102 for connecting to the drive shaft inside the turntable 5 is provided at the center of the flange 101. When the drive shaft inside the turntable 5 rotates, it drives the bridge plate 302 and the assembled horizontal slider positioning assembly 2, clamping assembly 4 and workpiece to flip synchronously through the bushing 102 and the flange 101, so as to realize double-sided processing.

[0031] like Figure 9 As shown, the usage process of this utility model is as follows: In use, first install this utility model on the designated position of the worktable 10 of the CNC machine tool. Then, a material bin 7 is set on one side of the worktable. The inner cavity of the material bin 7 is divided into a blank material area and a finished material area, which are used to hold the workpiece to be processed and the finished workpiece after processing, respectively. At the same time, a cover plate 8 is set on the top of the material bin 7. The cover plate 8 is driven to move horizontally by the cover plate drive cylinder 9 at the bottom to realize the closing and opening of the material bin. Two robotic arms are installed inside the CNC machine tool. One is a material picking robotic arm 11, which is used to grab the workpiece to complete the loading and unloading operations. The other is a material picking tray robotic arm 12, which is used to grab the material picking tray.

[0032] This utility model combines an auxiliary positioning device and a robotic arm for machining with existing programming technology. The specific operation steps are as follows: Step 1, Loading Operation: The material handling robot 11 moves to the area above the blank material area of ​​the workpieces to be processed. After aligning the workpieces, it simultaneously picks up two workpieces to be processed using a suction cup or gripper structure. After picking up the workpieces, it places them above the positioning holes on the bridge plate according to the set route. Then, it releases the suction or picks up the workpieces to be processed and accurately places them into the positioning holes. After placement, the robot resets and performs the next round of picking up the workpieces until all holes are filled with workpieces to be processed. Specifically, the N workpieces to be processed are stored in layers, with each layer having a material tray. When all the workpieces in a layer are processed, the corresponding material tray needs to be picked up and transferred by the material handling robot 12. Step 2, clamping operation: When the clamping cylinder receives the start command, the telescopic rod extends outward and rotates downward through the connecting arm, thereby driving the pressure rod and pressure block to press the workpiece to be processed completely downward into the positioning cavity; after clamping, the telescopic rod of the clamping cylinder retracts, driving the connecting arm to rotate in the opposite direction, returning to the non-clamping state; Step 3, slider movement, clamping and positioning: After the workpiece is clamped in place, the slider cylinder receives the command and starts, driving the telescopic rod to move down. Through the inclined slide groove, it cooperates with the wedge plates on the small slider and the large slider to push the small slider and the large slider to move synchronously and move closer to each other, finally clamping the workpiece and keeping it stationary; Step 4, Machining Operation: Perform CNC machining on the workpiece according to the set program. During the machining process, the horizontal slider positioning component remains clamped. Whether to rotate the workpiece during machining depends on the requirements of the workpiece, and the corresponding program is run accordingly. The CNC machining process includes, but is not limited to, CNC milling, drilling, and reaming operations. Step 5, unloading operation: After processing is completed, the telescopic rod of the slider cylinder rises, driving the small slider and the large slider to return to the far-away state. After the workpiece is positioned, the material handling robot 11 starts again, takes out the workpiece and puts it back on the material tray in the blank area.

[0033] Step 6, transfer of material trays: Specifically, the N parts to be processed are stored in layers, with one material tray in each layer; repeat steps one to five above. When all the parts in a layer have been processed, the corresponding material tray and the processed workpieces need to be picked up by the material tray picking robot 12 and moved to the finished product area according to the set route.

[0034] Repeat steps one through six above. Once all the workpieces to be processed in the blank area have been processed, a complete CNC automatic machining operation will be completed.

[0035] Furthermore, a proximity sensor switch 6 is installed between the hopper and the bridge plate. The proximity sensor switch 6 is designed to enable contact-based detection, feedback, and control. During the automated operation of this invention, the picking status is monitored each time the picking robot 11 passes through this point after picking up a part, ensuring the normal operation of the picking robot 11. If picking fails, a feedback signal is sent to the PLC control center, and the machine is stopped for maintenance. Therefore, the proximity sensor switch design ensures the safe, accurate, and efficient automated operation of the equipment.

[0036] This utility model provides an auxiliary positioning device for machining, which is used in conjunction with a hopper and a robotic arm. The robotic arm and hopper are all integrated and installed inside the CNC machine tool, realizing internal loading, machining, and unloading operations. This effectively shortens the movement path of the robotic arm and saves time in picking up and placing parts. At the same time, by picking up and placing parts with the robotic arm, hundreds or thousands of products can be processed with one opening and closing of the machine tool door, which greatly improves processing efficiency. Through the installation of enclosed built-in components, the working time of one opening and closing of the machine tool door is extended, while reducing the real-time monitoring time of the operator. One operator can supervise the operation of multiple machine tools at the same time.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0038] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An auxiliary positioning device for machining, characterized in that: It includes a horizontal slider positioning assembly (2), a support plate assembly (3), a clamping assembly (4) and a flip connection assembly (1). The support plate assembly (3) is mounted on the flip connection assembly (1), the horizontal slider positioning assembly (2) is connected inside the support plate assembly (3), and the clamping assembly (4) is connected above the support plate assembly (3).

2. The auxiliary positioning device for machining according to claim 1, characterized in that: The support plate assembly (3) includes a bridge plate (302), a first cover plate (303), a second cover plate (304), and a small cover plate (305). One side of the bridge plate (302) is bolted to the flip connection assembly (1), and the other side of the bridge plate (302) has multiple positioning holes that match the workpiece to be processed. The horizontal slider positioning assembly (2) is installed in the mounting groove of the bridge plate (302) and is covered and positioned by the first cover plate (303) and the second cover plate (304). The small cover plate (305) is connected above the outside of the mounting groove of the bridge plate (302) to restrict the movement of the horizontal slider positioning assembly (2).

3. The auxiliary positioning device for machining according to claim 2, characterized in that: The positioning cavity is configured as a through positioning hole, and an insert (306) is connected to the side wall of the positioning hole; the exposed side shape of the insert (306) matches the shape of the workpiece to be processed.

4. The auxiliary positioning device for machining according to claim 2, characterized in that: The horizontal slider positioning assembly (2) includes a slider cylinder (201), a wedge-shaped tie rod (202), a small slider (203), and a large slider (205). The slider cylinder (201) is installed at the bottom of the bridge plate (302). The driving end of the wedge-shaped tie rod (202) is connected to the slider cylinder tie rod (202-1) of the slider cylinder (201). Above the wedge-shaped tie rod (202) are arranged the small slider (203) and the large slider. The inclined groove of the block (205) is provided. The wedge-shaped tie rod (202) has a positioning post at the top center. The positioning post is connected through the through hole of the first cover plate (303) or the second cover plate (304). The small slider (203) and the large slider (205) are arranged in pairs and located on the inner and outer sides. The side of the small slider (203) and the large slider (205) closer to the positioning hole is the working side, and the shape of the working side matches the shape of the workpiece to be processed.

5. The auxiliary positioning device for machining according to claim 4, characterized in that: Protective blocks (204) are connected to the working sidewalls of the small slider (203) and the large slider (205), and the protective blocks (204) are made of flexible material.

6. The auxiliary positioning device for machining according to claim 4, characterized in that: The pressing assembly (4) includes a pressing cylinder (401), a pressing rod (405), and pressing blocks (406). One end of the pressing cylinder (401) is hinged to the bridge plate (302) via a fixed bracket (402). A connecting arm (403) is hinged to the telescopic rod end of the pressing cylinder (401). At the same time, the fixed end of the pressing rod (405) is hinged to the bridge plate (302) via a connecting arm fixing seat (404). The other end of the connecting arm (403) is positioned and connected to the two pressing blocks (406) via the pressing rod (405). The position of the pressing block (406) corresponds one-to-one with the position of the positioning hole.

7. The auxiliary positioning device for machining according to claim 6, characterized in that: The flip connection assembly (1) is rotatably connected to the turntable (5), which is positioned on the worktable (10) of the CNC machine tool. After the drive shaft inside the turntable (5) is started, it drives the workpiece to be processed on the bridge plate (302) to flip and complete double-sided processing.

8. The auxiliary positioning device for machining according to claim 7, characterized in that: The flip connection assembly (1) includes a flange (101), one side of which is fixedly connected to the bridge plate (302) via a flange connecting plate (103). A reinforcing side support plate (301) is provided between the bottom two sides of the bridge plate (302) and the flange connecting plate (103). A bushing (102) for connecting to the drive shaft inside the turntable (5) is provided at the center of the flange (101).

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