Universal reverse positioning tool for board splitting machine

Abstract

The utility model belongs to the technical field of board splitting machine printed board splicing positioning, and particularly relates to a universal reverse positioning tool for a board splitting machine and an implementation method, which comprises a fastening screw, an equal-height table, an ejector pin, a magnetic block, an ejector pin magnet, a magnetic block magnet and a foundation plate, the printed board is placed on the four magnetic blocks in the normal direction, fixed through the four fastening screws and then turned over to be placed on the four equal-height tables, the thimbles with the corresponding number are placed according to the positioning holes in the printed board, and the foundation board falls down and is attached with the gravity of the foundation board when gradually getting close to the thimbles and the magnetic blocks. And finally, the whole tool is turned over and placed on a workbench of a board splitting machine to be fixed, and the positioning process can be completed. According to the tool, the positioning visual angle of a traditional tool is expanded through reverse clamping, operation is convenient, and a printed board can be prevented from being scratched by the tip; the requirements of various kinds of printed board makeup on the aspects of adaptability, accuracy, safety, reliability and the like of board splitting positioning of the board splitting machine can be met, and good popularization value is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of printed circuit board assembly and positioning technology for PCB depaneling machines, specifically relating to a universal reverse positioning fixture for PCB depaneling machines, which is suitable for positioning and clamping various printed circuit board assembly on PCB depaneling machines. Background Technology

[0002] The depaneling machine comes with a magnetic ejector pin clamp, which uses holes on the PCBA printed circuit board for positioning. However, due to factors such as the magnetic force at the bottom of the ejector pin and interference from circuit components on the printed circuit board, the ejector pin is difficult to move, making positioning and insertion / removal inconvenient and easily causing scratches to the printed circuit board. Moreover, when the operator leans over to move the ejector pin, the PCBA printed circuit board obstructs the view, limiting the field of vision and affecting clamping efficiency. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] The technical problem to be solved by this utility model is: how to provide a universal reverse positioning fixture for PCB depaneling machines, which solves the problems of existing PCB depaneling machines having difficult magnetic ejector pin movement, inconvenient positioning and insertion / removal, easy scratching of printed circuit boards, and operator bending over to move the ejector pin, PCBA printed circuit boards obstructing the view, limiting the field of vision, and low clamping efficiency.

[0005] (II) Technical Solution

[0006] To solve the above technical problems, this utility model provides a universal reverse positioning fixture for a PCB splitter. The universal reverse positioning fixture for a PCB splitter includes: a fastening screw (1), a pin (4), a magnetic block (5), a pin magnet (6), a magnetic block magnet (7), and a base plate (8).

[0007] The magnetic block (5) has two circular countersunk holes at one end and two raised positioning platforms at the other end. The raised positioning platforms have an M3 threaded hole in the middle for fastening the printed circuit board (3). The magnetic block magnet (7) is a circular strong magnet that cooperates with the circular countersunk holes of the magnetic block (5).

[0008] The ejector pin (4) includes an ejector pin head (9) and an ejector pin seat (10). One end of the ejector pin head (9) and the ejector pin seat (10) are connected as one unit by an M3 thread. The other end of the ejector pin seat (10) is provided with a circular countersunk hole, which is used in conjunction with the ejector pin magnet (6). The ejector pin magnet (6) is a circular strong magnet, which is used in conjunction with the circular countersunk hole of the ejector pin seat (10).

[0009] The printed circuit board (3) is fixed and pressed together with four magnetic blocks (5) by four fastening screws (1) to ensure the stability of the reverse clamping process; the fastening screws (1) are screwed into the M3 threaded hole in the middle of the protruding positioning platform of the magnetic block (5); at this point, the magnetic block (5) and the printed circuit board (3) form a connection structure.

[0010] With the above connection structure formed, the pin heads (9) of the multiple pins (4) are respectively inserted into the positioning holes on the printed circuit board (3); thus, the magnetic block (5), the pins (4), and the printed circuit board (3) constitute an integral structure.

[0011] The base plate (8) supports the overall structure consisting of the magnetic block (5), the ejector pin (4), and the printed circuit board (3). The magnetic block (5) is attracted to the base plate (8) by the magnetic block magnet (7) and the ejector pin (4) is attracted to the base plate (8) by the ejector pin magnet (6).

[0012] The universal reverse positioning fixture for the PCB splitting machine also includes a leveling platform (2);

[0013] The leveling platform (2) is fixed on the plane and is used to flip the connection structure after the magnetic blocks (5) and the printed circuit board (3) form a connection structure so that the contact surface of the printed circuit board (3) and the four magnetic blocks (5) is facing up and the other side is facing down. By placing the printed circuit board (3) on the four leveling platforms (2), the printed circuit board (3) is in a horizontal state. The pin heads (9) of the multiple pins (4) are inserted into the positioning holes on the printed circuit board (3) respectively. The magnetic blocks (5), the pins (4) and the printed circuit board (3) form an integral structure. Then, the base plate (8) is moved to the integral structure, and the magnetic block magnets (7) on the magnetic blocks (5) and the pin magnets (6) on the pins (4) are attracted to the base plate (8).

[0014] By flipping the overall structure so that the other side of the printed circuit board (3) is facing down, the printed circuit board (3) is placed on four equal platforms (2) so that the printed circuit board (3) is in a horizontal state. In this state, the pin heads (9) of multiple ejector pins (4) are inserted into the positioning holes on the printed circuit board (3). This avoids the problems of the original ejector pins of the machine tool being attracted to the worktable and inconvenient to move, the operator having to bend over to move the ejector pins, the printed circuit board (3) blocking the line of sight, the field of vision being limited, the clamping efficiency being low, and the printed circuit board being easily scratched.

[0015] After the magnetic block magnet (7) on the magnetic block (5) and the ejector magnet (6) on the ejector pin (4) are attracted to the base plate (8), the final universal reverse positioning fixture for the PCB splitter is formed. The entire universal reverse positioning fixture for the PCB splitter is flipped over and placed on the PCB splitter workbench for fixation, thus completing the positioning process.

[0016] The outer circle of the fastening screw (1) is knurled for easy tightening, and the large end face of the threaded part is pressed against the printed circuit board (3).

[0017] The thickness of the magnetic block magnet (7) is 0 to 0.05 mm smaller than the depth of the circular countersunk hole at the bottom of the magnetic block (5), which is used to control the magnetic preload.

[0018] The thickness of the ejector magnet (6) is 0 to 0.05 mm less than the depth of the circular countersunk hole at the bottom of the ejector seat (10) to control the magnetic preload.

[0019] The ejector pin (9) can be configured with different head diameters as needed to improve positioning accuracy.

[0020] The printed circuit board (3) is a PCBA printed circuit board.

[0021] (III) Beneficial Effects

[0022] This utility model designs a universal reverse positioning fixture for PCB splitting machines, see Figure 1 , Figure 6 As shown. Figure 1 This is a schematic diagram of the flipping and positioning process of the reverse positioning fixture. The positioning holes and circuit components on the PCBA printed circuit board are fully displayed in front of the operator. At this time, all you need to do is insert the ejector pins one by one into the positioning holes and then cover the base board. All the problems that existed before are completely solved. Figure 6 This is a diagram showing the usage status of the reverse positioning fixture on the machine tool worktable, which can fully meet actual production needs.

[0023] Compared with the existing technology, the universal reverse positioning fixture for depaneling machines provided by this utility model solves the problems of the existing depaneling machines having difficulty moving the magnetic ejector pins, inconvenient positioning and insertion / removal, easy scratching of the printed circuit board, and the operator having to bend over to move the ejector pins, with the PCBA printed circuit board obstructing the view, limiting the field of vision, and resulting in low clamping efficiency.

[0024] The tooling of this invention is versatile, saving the cost of dedicated tooling, and allows operators to perform reverse positioning operations conveniently and quickly. After positioning and clamping thousands of different types of printed circuit boards, the processing was stable, verifying that the tooling can meet the requirements of various printed circuit board assembly types for the adaptability, accuracy, safety, and reliability of the board separation machine's positioning. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the flipping and positioning process of the universal reverse positioning fixture for PCB depaneling machines.

[0026] Figure 2 This is a schematic diagram of the magnetic block assembly structure.

[0027] Figure 3 This is a schematic diagram of the ejector pin assembly structure.

[0028] Figure 4 This is a schematic diagram of fixing a PCBA printed circuit board.

[0029] Figure 5 This is a schematic diagram of inserting a pin into the positioning hole of a PCBA printed circuit board in reverse.

[0030] Figure 6 This is a diagram showing the usage status of the reverse positioning fixture on the machine tool worktable.

[0031] Figure 1 and Figure 6 These are schematic diagrams of the reverse and front sides of the universal reverse positioning fixture for PCB splitting machines of this utility model.

[0032] 1-Fastening screw; 2-Elevation platform; 3-Printed circuit board; 4-Ejector pin; 5-Magnetic block; 6-Ejector pin magnet; 7-Magnetic block magnet; 8-Base plate; 9-Ejector pin head; 10-Ejector pin seat. Detailed Implementation

[0033] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0034] To solve the above-mentioned technical problems, this utility model provides a universal reverse positioning fixture for PCB depaneling machines, such as... Figure 1 As shown, the universal reverse positioning fixture for the PCB splitting machine includes: fastening screws (1), ejector pins (4), magnetic blocks (5), ejector pin magnets (6), magnetic block magnets (7), and a base plate (8);

[0035] like Figure 2 As shown, the magnetic block (5) has two circular countersunk holes at one end and two raised positioning platforms at the other end. The raised positioning platforms have an M3 threaded hole in the middle for fastening the printed circuit board (3). The magnetic block magnet (7) is a circular strong magnet that cooperates with the circular countersunk holes of the magnetic block (5).

[0036] like Figure 3 As shown, the ejector pin (4) includes an ejector pin head (9) and an ejector pin seat (10). One end of the ejector pin head (9) and the ejector pin seat (10) are connected as one piece by an M3 thread. The other end of the ejector pin seat (10) is provided with a circular countersunk hole, which is used in conjunction with the ejector pin magnet (6). The ejector pin magnet (6) is a circular strong magnet, which is used in conjunction with the circular countersunk hole of the ejector pin seat (10).

[0037] The printed circuit board (3) is fixed and pressed together with four magnetic blocks (5) by four fastening screws (1) to ensure the stability of the reverse clamping process; the fastening screws (1) are screwed into the M3 threaded hole in the middle of the protruding positioning platform of the magnetic block (5); at this point, the magnetic block (5) and the printed circuit board (3) form a connection structure.

[0038] With the above connection structure formed, the pin heads (9) of the multiple pins (4) are respectively inserted into the positioning holes on the printed circuit board (3); thus, the magnetic block (5), the pins (4), and the printed circuit board (3) constitute an integral structure.

[0039] The base plate (8) supports the overall structure consisting of the magnetic block (5), the ejector pin (4), and the printed circuit board (3). The magnetic block (5) is attracted to the base plate (8) by the magnetic block magnet (7) and the ejector pin (4) is attracted to the base plate (8) by the ejector pin magnet (6).

[0040] The universal reverse positioning fixture for the PCB splitting machine also includes a leveling platform (2);

[0041] The leveling platform (2) is fixed on the plane and is used to flip the connection structure after the magnetic blocks (5) and the printed circuit board (3) form a connection structure so that the contact surface of the printed circuit board (3) and the four magnetic blocks (5) is facing up and the other side is facing down. By placing the printed circuit board (3) on the four leveling platforms (2), the printed circuit board (3) is in a horizontal state. The pin heads (9) of the multiple pins (4) are inserted into the positioning holes on the printed circuit board (3) respectively. The magnetic blocks (5), the pins (4) and the printed circuit board (3) form an integral structure. Then, the base plate (8) is moved to the integral structure, and the magnetic block magnets (7) on the magnetic blocks (5) and the pin magnets (6) on the pins (4) are attracted to the base plate (8).

[0042] By flipping the overall structure so that the other side of the printed circuit board (3) is facing down, the printed circuit board (3) is placed on four equal platforms (2) so that the printed circuit board (3) is in a horizontal state. In this state, the pin heads (9) of multiple ejector pins (4) are inserted into the positioning holes on the printed circuit board (3). This avoids the problems of the original ejector pins of the machine tool being attracted to the worktable and inconvenient to move, the operator having to bend over to move the ejector pins, the printed circuit board (3) blocking the line of sight, the field of vision being limited, the clamping efficiency being low, and the printed circuit board being easily scratched.

[0043] After the magnetic block magnet (7) on the magnetic block (5) and the ejector magnet (6) on the ejector pin (4) are attracted to the base plate (8), the final universal reverse positioning fixture for the PCB splitter is formed. The entire universal reverse positioning fixture for the PCB splitter is flipped over and placed on the PCB splitter workbench for fixation, thus completing the positioning process.

[0044] The outer circle of the fastening screw (1) is knurled for easy tightening, and the large end face of the threaded part is pressed against the printed circuit board (3).

[0045] The thickness of the magnetic block magnet (7) is 0 to 0.05 mm smaller than the depth of the circular countersunk hole at the bottom of the magnetic block (5), which is used to control the magnetic preload.

[0046] The thickness of the ejector magnet (6) is 0 to 0.05 mm less than the depth of the circular countersunk hole at the bottom of the ejector seat (10) to control the magnetic preload.

[0047] The ejector pin (9) can be configured with different head diameters as needed to improve positioning accuracy.

[0048] The printed circuit board (3) is a PCBA printed circuit board.

[0049] Furthermore, this utility model also provides a method for implementing a universal reverse positioning fixture for a PCB depaneling machine, the method comprising:

[0050] Step 1: Prepare magnetic blocks (5) and magnetic block magnets (7). One end of the magnetic block (5) has two round countersunk holes, and the other end has two raised positioning platforms. The raised positioning platforms have M3 threaded holes in the middle for fastening the printed circuit board (3). The magnetic block magnets (7) are round strong magnets that cooperate with the round countersunk holes of the magnetic blocks (5).

[0051] Step 2: Prepare the ejector pin (4) and ejector pin magnet (6); the ejector pin (4) includes an ejector pin head (9) and an ejector pin seat (10), and one end of the ejector pin head (9) and the ejector pin seat (10) are connected as one piece by an M3 thread; the other end of the ejector pin seat (10) is provided with a circular countersunk hole, which is used in conjunction with the ejector pin magnet (6); the ejector pin magnet (6) is a circular strong magnet, which is used in conjunction with the circular countersunk hole of the ejector pin seat (10);

[0052] Step 3: Fix and press one side of the printed circuit board (3) and the four magnetic blocks (5) together with four fastening screws (1) to ensure the stability of the reverse clamping process; screw the fastening screws (1) into the M3 threaded hole in the middle of the positioning platform of the magnetic block (5); at this point, the magnetic block (5) and the printed circuit board (3) form a connection structure.

[0053] Step 4: Flip the connection structure so that the mating surface of the printed circuit board (3) and the four magnetic blocks (5) is facing up and the other side is facing down. Place the printed circuit board (3) on the four equal-height platforms (2) so that the printed circuit board (3) is in a horizontal state. Insert the pin heads (9) of the multiple ejector pins (4) into the positioning holes on the printed circuit board (3) respectively. At this point, the magnetic blocks (5), ejector pins (4), and printed circuit board (3) form an integral structure.

[0054] Step 5: Move the base plate (8) towards the overall structure, and then the magnetic block magnet (7) on the magnetic block (5) and the ejector magnet (6) on the ejector pin (4) will be attracted to the base plate (8) to form the final universal reverse positioning tooling for the splitting machine.

[0055] Step Six: Flip the entire universal reverse positioning fixture of the PCB splitter onto the PCB splitter's worktable and fix it in place; this completes the positioning process.

[0056] Example 1

[0057] like Figure 1 and Figure 6As shown, this utility model provides a universal reverse positioning fixture for a board splitting machine, including fastening screws (1), a leveling platform (2), ejector pins (4), magnetic blocks (5), ejector pin magnets (6), magnetic block magnets (7), and a base plate (8), used to fix PCBA printed circuit boards (3) to achieve positioning and board splitting processing. The operator holds the base plate (8) with both hands and gradually moves it close to the ejector pins (4) and magnetic blocks (5). As the operator falls and adheres to the base plate, the fixture is finally flipped over and placed on the worktable of the board splitting machine for fixation. The four fastening screws (1) are then removed to complete the positioning and board splitting processing.

[0058] like Figure 2 and Figure 3 As shown, the magnetic block (5) and the ejector seat (10) are fixed to the base plate (8) by the attraction of the circular magnet at the bottom. The magnetic block (5) has two circular countersunk holes at the bottom and two raised positioning platforms at the top. The positioning platforms have M3 threaded holes in the middle for fastening the printed circuit board. The magnetic block magnet (7) is a circular strong magnet that matches the circular countersunk hole at the bottom of the magnetic block (5). The thickness of the magnet is 0 to 0.05 mm less than the depth of the countersunk hole, which is used to control the magnetic preload. The ejector head (9) and the ejector seat (10) are connected by an M3 thread to form an ejector (4). The ejector head (9) can be configured with different head diameters as needed to improve positioning accuracy. The ejector seat (10) has a circular countersunk hole at the bottom, which matches the ejector magnet (6). The ejector magnet (6) is a circular strong magnet that matches the circular countersunk hole at the bottom of the ejector seat (10). The thickness of the magnet is 0 to 0.05 mm less than the depth of the countersunk hole, which is used to control the magnetic preload.

[0059] like Figure 4 As shown, the fastening screws (1) and magnetic blocks (5) are connected by threads to fix the PCBA printed circuit board (3). The four fastening screws (1) are connected to the threaded holes on the four magnetic blocks (5) respectively, thereby fixing and pressing the PCBA printed circuit board (3) into a whole to ensure the stability of the reverse clamping process. The knurled outer circle of the fastening screws (1) is easy to tighten, and the large end face of the thread is in close contact with the PCBA printed circuit board (3) for pressing.

[0060] like Figure 5 As shown, the fastening screw (1) and the magnetic block (5) are connected by threads to fix the PCBA printed circuit board (3). The PCBA printed circuit board (3) is flipped over and placed on four equal platforms (2). The ejector pins (4) are inserted into the positioning holes on the PCBA printed circuit board (3) respectively. This avoids the problems of the original ejector pins of the machine tool being attracted to the worktable and inconvenient to move, the operator having to bend over to move the ejector pins, the PCBA printed circuit board (3) blocking the line of sight, limited field of vision, low clamping efficiency, and easy scratching of the printed circuit board.

[0061] The implementation steps for the above content are as follows:

[0062] Step 1: As Figure 2 As shown, ensure that the magnetic block assembly meets the feature requirements.

[0063] Step Two: As Figure 3 As shown, ensure that the ejector pin assembly meets the feature requirements.

[0064] Step 3: As Figure 4 As shown, the PCBA printed circuit board is fixed.

[0065] Step Four: As Figure 5 As shown, insert the ejector pins into the positioning holes of the PCBA printed circuit board in reverse.

[0066] Step 5: As Figure 1 As shown, it fits the base plate.

[0067] Step Six: As Figure 6 As shown, the reverse positioning fixture is used on the machine tool worktable.

[0068] This tooling can meet the requirements of various printed circuit board assembly for the adaptability, accuracy, safety, and reliability of the board separation machine in terms of positioning, and has good promotional value.

[0069] Example 2

[0070] The universal reverse positioning fixture for the PCB depaneling machine in this embodiment is shown in [link to documentation]. Figure 1 This includes fastening screws (1), a leveling platform (2), ejector pins (4), magnetic blocks (5), ejector pin magnets (6), magnetic block magnets (7), and a base plate (8). See [link / reference]. Figure 4 The PCBA printed circuit board (3) can be fixed and pressed together by connecting four fastening screws (1) to the threaded holes on the four magnetic blocks (5) to ensure the stability of the reverse clamping process. See Figure 5 The PCBA printed circuit board (3) is flipped over and placed on four platforms (2) of equal height. The ejector pins (4) are then inserted into the positioning holes on the PCBA printed circuit board (3). See [link / description]. Figure 1 and Figure 6 When the operator holds the base plate (8) with both hands and gradually approaches the ejector pin (4) and the magnetic block (5), it falls and fits with its own weight. Finally, the entire tooling is flipped over and placed on the worktable of the splitting machine to be fixed, thus completing the positioning process.

[0071] Reverse positioning principle:

[0072] The operator places the PCBA printed circuit board (3) upside down on four level platforms (2) and inserts the ejector pins (4) one by one, then covers it with the base plate (8) to complete the positioning process. The PCBA printed circuit board (3) is fixed and pressed into a whole by connecting the four fastening screws (1) to the threaded holes on the four magnetic blocks (5) to ensure the stability of the reverse clamping process. Finally, the base plate (8) is flipped over and placed on the worktable of the depaneling machine and fixed. The four fastening screws (1) are removed to complete the positioning and depaneling process.

[0073] Positioning accuracy:

[0074] The positioning accuracy of the universal reverse positioning fixture for the PCB splitting machine is no less than that of the machine tool's own fixture, and the positioning accuracy can be further improved by using a specially designed ejector pin. See Figure 3 The ejector pin (4) is formed by connecting the ejector pin head (9) and the ejector pin seat (10) together via an M3 thread. The ejector pin head (9) can be configured with different head diameters as needed to reduce the gap with the positioning hole on the PCBA printed circuit board and improve positioning accuracy.

[0075] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A universal reverse positioning fixture for a PCB splitting machine, characterized in that, The universal reverse positioning fixture for the PCB splitting machine includes: fastening screws (1), ejector pins (4), magnetic blocks (5), ejector pin magnets (6), magnetic block magnets (7), and a base plate (8); The magnetic block (5) has two circular countersunk holes at one end and two raised positioning platforms at the other end. The raised positioning platforms have an M3 threaded hole in the middle for fastening the printed circuit board (3). The magnetic block magnet (7) is a circular strong magnet that cooperates with the circular countersunk holes of the magnetic block (5). The ejector pin (4) includes an ejector pin head (9) and an ejector pin seat (10). One end of the ejector pin head (9) and the ejector pin seat (10) are connected as one unit by an M3 thread. The other end of the ejector pin seat (10) is provided with a circular countersunk hole, which is used in conjunction with the ejector pin magnet (6). The ejector pin magnet (6) is a circular strong magnet, which is used in conjunction with the circular countersunk hole of the ejector pin seat (10). The printed circuit board (3) is fixed and pressed together with four magnetic blocks (5) by four fastening screws (1) to ensure the stability of the reverse clamping process; the fastening screws (1) are screwed into the M3 threaded hole in the middle of the protruding positioning platform of the magnetic block (5); at this point, the magnetic block (5) and the printed circuit board (3) form a connection structure. With the above connection structure formed, the pin heads (9) of the multiple pins (4) are respectively inserted into the positioning holes on the printed circuit board (3); thus, the magnetic block (5), the pins (4), and the printed circuit board (3) constitute an integral structure. The base plate (8) supports the overall structure consisting of the magnetic block (5), the ejector pin (4), and the printed circuit board (3). The magnetic block (5) is attracted to the base plate (8) by the magnetic block magnet (7) and the ejector pin (4) is attracted to the base plate (8) by the ejector pin magnet (6).

2. The universal reverse positioning fixture for PCB depaneling machines as described in claim 1, characterized in that, The universal reverse positioning fixture for the PCB splitting machine also includes a leveling platform (2); The leveling platform (2) is fixed on the plane and is used to flip the connection structure after the magnetic blocks (5) and the printed circuit board (3) form a connection structure so that the contact surface of the printed circuit board (3) and the four magnetic blocks (5) is facing up and the other side is facing down. By placing the printed circuit board (3) on the four leveling platforms (2), the printed circuit board (3) is in a horizontal state. The pin heads (9) of the multiple pins (4) are inserted into the positioning holes on the printed circuit board (3) respectively. The magnetic blocks (5), the pins (4) and the printed circuit board (3) form an integral structure. Then, the base plate (8) is moved to the integral structure, and the magnetic block magnets (7) on the magnetic blocks (5) and the pin magnets (6) on the pins (4) are attracted to the base plate (8).

3. The universal reverse positioning fixture for PCB depaneling machines as described in claim 2, characterized in that, By flipping the overall structure so that the other side of the printed circuit board (3) is facing down, the printed circuit board (3) is placed on four equal platforms (2) so that the printed circuit board (3) is in a horizontal state. In this state, the pin heads (9) of multiple ejector pins (4) are inserted into the positioning holes on the printed circuit board (3). This avoids the problems of the original ejector pins of the machine tool being attracted to the worktable and inconvenient to move, the operator having to bend over to move the ejector pins, the printed circuit board (3) blocking the line of sight, the field of vision being limited, the clamping efficiency being low, and the printed circuit board being easily scratched.

4. The universal reverse positioning fixture for PCB depaneling machines as described in claim 2, characterized in that, After the magnetic block magnet (7) on the magnetic block (5) and the ejector magnet (6) on the ejector pin (4) are attracted to the base plate (8), the final universal reverse positioning fixture for the PCB splitter is formed. The entire universal reverse positioning fixture for the PCB splitter is flipped over and placed on the PCB splitter workbench for fixation, thus completing the positioning process.

5. The universal reverse positioning fixture for PCB depaneling machines as described in claim 1, characterized in that, The outer knurling of the fastening screw (1) facilitates tightening.

6. The universal reverse positioning fixture for PCB depaneling machines as described in claim 1, characterized in that, The large end face of the threaded part of the fastening screw (1) is pressed against the printed circuit board (3).

7. The universal reverse positioning fixture for PCB depaneling machines as described in claim 1, characterized in that, The thickness of the magnetic block magnet (7) is 0 to 0.05 mm smaller than the depth of the circular countersunk hole at the bottom of the magnetic block (5) to control the magnetic pre-tightening.

8. The universal reverse positioning fixture for PCB depaneling machines as described in claim 1, characterized in that, The thickness of the ejector magnet (6) is 0 to 0.05 mm less than the depth of the circular countersunk hole at the bottom of the ejector seat (10) to control the magnetic preload.

9. The universal reverse positioning fixture for PCB depaneling machines as described in claim 1, characterized in that, The ejector pin (9) can be configured with different head diameters as needed to improve positioning accuracy.

10. The universal reverse positioning fixture for PCB depaneling machines as described in claim 1, characterized in that, The printed circuit board (3) is a PCBA printed circuit board.

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