Polishing device for coated copper of printed circuit board

Abstract

The invention discloses a printed circuit board coated copper polishing device, and relates to the field of circuit board processing, the printed circuit board coated copper polishing device comprises an integrated shell, a polishing machine main body, a mounting structure, a limiting structure and an adjusting structure, the polishing machine main body is arranged at the bottom of the integrated shell; the mounting structure is arranged between the grinding machine main body and the integrated shell, and the mounting structure is used for rotationally mounting the grinding machine main body in the integrated shell; the limiting structure is arranged outside the grinding machine body and used for limiting the grinding thickness of the grinding machine body. The adjusting structure is arranged on the integrated shell and used for adjusting the angle of the grinding machine body. By rotating the limiting ring, the limiting ring rotates on the mounting base in a threaded mode, the position of the limiting ring is changed, then the distance between the bottom end of the grinding machine body and the bottom end of the limiting ring is changed, movement of the grinding machine body is limited, the grinding machine body cannot continue to move downwards for grinding, the purpose of controlling the grinding thickness is achieved, and the efficiency of grinding operation is improved.

Description

Technical Field

[0001] This invention relates to the field of circuit board processing, and in particular to a polishing device for copper coating on printed circuit boards. Background Technology

[0002] With the increasing integration of electronic products, higher requirements are being placed on printed circuit boards (PCBs). In particular, there are stricter requirements for copper plating. Products need to control the copper plating, but some high-end customers have high requirements for the copper thickness of vias in certain areas of the PCB, requiring 37.5µm or 42.5µm and above. Even after achieving the required copper plating thickness, the surface copper thickness may be too thick to meet the customer's line width / spacing requirements. In such cases, it is necessary to polish the localized copper plating on the PCB to meet the customer's processing requirements.

[0003] Traditional polishing machines, due to their large polishing area, are not suitable for polishing localized copper-clad areas on circuit boards. When polishing copper-clad areas on circuit boards, a typical polishing machine requires a person to hold it and tilt it to allow the polishing disc to contact the copper-clad area, thus reducing the contact area. However, in actual operation, because the polishing machine is tilted, the operator cannot maintain a stable tilt angle, increasing the difficulty of handling the machine and causing deviations in the tilt angle. This affects the contact between the polishing disc and the copper-clad area. Furthermore, when the polishing machine is in contact with the copper-clad area, the polishing disc obstructs the polishing area, affecting the operator's judgment and making it difficult to control the polishing thickness, ultimately reducing the processing efficiency of copper-clad polishing on circuit boards. Summary of the Invention

[0004] The purpose of this invention is to provide a polishing device for copper coating on printed circuit boards to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a copper-clad polishing device for printed circuit boards, comprising: Integrated housing; The main body of the grinding machine is located at the bottom of the integrated housing; The mounting structure is disposed between the grinding machine body and the integrated housing, and the mounting structure is used to install and connect the grinding machine body and the integrated housing; A limiting structure is provided on the outside of the grinding machine body, and the limiting structure is used to limit the grinding thickness of the grinding machine body; An adjustment structure is provided on the integrated housing, and the adjustment structure is used to adjust the angle of the main body of the grinder.

[0006] Preferably, the mounting structure includes: A pneumatic rotary motor is housed within an integrated housing, and its output end is connected to the main body of the grinder via a transmission connection. The mounting shaft has one end fixedly connected to the outer wall of the pneumatic rotary motor, and the other end rotatably connected to the inner wall of the integrated housing. A connector is disposed in the inner cavity of the integrated housing, and the connector is rotatably interlocked with the pneumatic rotary motor and the main body of the grinder. A connecting shaft, which is fixedly connected to the outer wall of the connector; A connecting groove is formed on the inner wall of the integrated housing. The connecting groove and the connecting shaft are slidably intersected. The connecting groove is arc-shaped.

[0007] Preferably, the limiting structure includes: Mounting base, the mounting base is fixedly connected to the lower surface of the integrated housing, and the outer wall of the mounting base is provided with external threads; A limiting ring is provided on the outside of the grinding machine body. The top of the inner wall of the limiting ring is threaded to the outer wall of the mounting base. The limiting ring is convex in shape. A rubber ring is fixedly connected to the bottom end of the limiting ring.

[0008] Preferably, the limiting structure further includes: The mounting slot is formed on the integrated housing; The movable rod is slidably inserted into the mounting groove, and the bottom end of the movable rod is in contact with the top end of the limiting ring; A movable groove is formed on the front side of the integrated housing; A pointer, which is fixedly connected to the top of the movable rod, and the pointer is slidably inserted into the movable groove; A compression spring is disposed at the bottom of the mounting groove cavity and is movably sleeved with the bottom of the movable rod; A compression block is fixedly connected to the bottom of the movable rod, and the upper surface of the compression block is in contact with the bottom end of the compression spring.

[0009] Preferably, the adjustment structure includes: A fixing block is fixedly connected to one side of the outer wall of the pneumatic rotary motor, and the fixing block is arranged in a long strip shape; The mounting cavity is located on the back side of the integrated housing; A movable block is slidably inserted into the mounting cavity, and the movable block is located on one side of the pneumatic rotary motor. A connecting post, which is fixedly connected to one end of the movable block; A sliding groove is formed on a fixed block, and the sliding groove is slidably intersected with the connecting column.

[0010] Preferably, the adjustment structure further includes: A rotating disk, wherein the rotating disk is disposed within the mounting cavity; A fixed shaft is fixedly connected to the center of the rotating disk, and one end of the fixed shaft is rotatably connected to the inner wall of the mounting cavity; Extrusion grooves, which are symmetrically arranged on the rotating disk; A fixed column is fixedly connected to the other end of the movable block, and the fixed column and the extrusion groove are slidably intersected. A connecting block, one end of which is fixedly connected to the bottom of the rotating disk, and the connecting block is slidably inserted into the mounting cavity.

[0011] Preferably, the adjustment structure further includes: A positioning groove is provided on the connecting block; An adjusting screw is located below the connecting block and at the bottom of the handle; The mounting head is rotatably connected to one end of the adjusting screw; A positioning block is fixedly connected to the outer wall of the mounting head, and the positioning block is slidably interlocked with the positioning groove. A limiting block is fixedly connected to one end of a positioning block, and the limiting block is in contact with the outer wall of the connecting block; A support block, the top of which is fixedly connected to the inner wall of the mounting cavity, and the support block is threadedly connected to the adjusting screw.

[0012] Preferably, both sides of the limiting ring are threaded with bolts, and one end of the bolt is rotatably connected to an extrusion block. The extrusion block is arc-shaped, and the bottom end of the mounting base is provided with an annular groove. The annular groove and the extrusion block are slidably interlocked, and one side of the extrusion block is in contact with the inner wall of the annular groove.

[0013] Preferably, the integrated housing consists of a grinder housing and a handle. The handle is fixedly connected to the outer wall of the grinder housing. A start switch is fixedly installed at the bottom of one end of the handle. A pneumatic speed control valve is fixedly connected to the other end of the handle. The pneumatic rotary motor is fixedly connected to one end of the pneumatic speed control valve through a hose. A level is fixedly installed on the upper surface of the integrated housing.

[0014] Preferably, the front of the integrated housing is provided with scale lines, the scale lines correspond to the position of the pointer, the movable block is arranged vertically, and the rotating disk is arranged on one side of the movable block.

[0015] The technical effects and advantages of this invention are as follows: (1) This invention utilizes a combination of a grinding machine body, a mounting base, a limiting ring, a movable rod, and a pointer. By rotating the limiting ring, it rotates threadedly on the mounting base, changing the position of the limiting ring. The movable rod moves vertically with the movement of the limiting ring, causing the pointer to move vertically on the front of the integrated housing and match the scale line. This controls the adjustment distance of the limiting ring, thereby changing the distance between the bottom end of the grinding machine body and the bottom end of the limiting ring. When the bottom end of the limiting ring contacts the surface of the circuit board, it restricts the movement of the grinding machine body, preventing it from continuing to move downwards for grinding. This achieves the purpose of controlling the grinding thickness and improving the efficiency of the grinding operation. (2) The present invention utilizes an adjustment screw, positioning block, positioning groove, connecting block, rotating disk, extrusion groove, fixed column, movable block and fixed block in a coordinated manner. By rotating the adjustment screw, the positioning block is driven to move horizontally. The positioning block presses against the inner wall of the positioning groove, which pushes the connecting block and rotating disk to rotate. The extrusion groove on the rotating disk presses against the fixed column, which drives the two movable blocks to move horizontally in opposite directions. The connecting column moves with the movable block and presses against the sliding groove, which pushes the fixed block and pneumatic rotary motor, so that the pneumatic rotary motor rotates around the mounting shaft. The tilt angle of the pneumatic rotary motor and the grinding machine body can be adjusted, which facilitates small-area grinding of copper on the circuit board and facilitates stable control of the grinding machine body, thus improving the stability of grinding. (3) The present invention utilizes the matching arrangement of connector, connecting shaft and connecting groove. The connecting head is driven to rotate together by the rotation of pneumatic rotary motor and the main body of the grinder. The connecting shaft slides along the inner cavity of the connecting groove. The inner wall of the connecting groove supports the connecting shaft and the connecting head, thereby improving the stability of the main body of the grinder. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the side structure of the integrated housing of the present invention.

[0018] Figure 3 This is a side cross-sectional view of the integrated housing of the present invention.

[0019] Figure 4 This is a schematic diagram of the side structure of the fixing block in this invention.

[0020] Figure 5 This is a side cross-sectional view of the limiting ring of the present invention.

[0021] Figure 6 For the present invention Figure 3 A magnified structural diagram at point A.

[0022] Figure 7 This is a side cross-sectional view of the rotating disk of the present invention.

[0023] Figure 8 This is a schematic diagram of the side structure of the connecting block in this invention.

[0024] Figure 9 This is a bottom view of the mounting base of the present invention.

[0025] In the diagram: 1. Integrated housing; 2. Handle; 3. Grinding machine body; 4. Mounting structure; 41. Pneumatic rotary motor; 42. Mounting shaft; 43. Connector; 44. Connecting shaft; 45. Connecting groove; 5. Limiting structure; 51. Mounting base; 52. Limiting ring; 53. Rubber ring; 54. Mounting groove; 55. Movable rod; 56. Movable groove; 57. Pointer; 58. Compression spring; 59. Compression block; 6. Adjusting structure; 61. Fixing block; 62. 63. Mounting cavity; 64. Movable block; 65. Connecting column; 66. Sliding groove; 67. Rotating disk; 68. Fixed shaft; 69. Extrusion groove; 60. Fixed column; 610. Connecting block; 611. Positioning groove; 612. Adjusting screw; 613. Mounting head; 614. Positioning block; 615. Limiting block; 616. Support block; 7. Bolt; 8. Extrusion block; 9. Annular groove; 10. Start switch; 11. Air pressure speed control valve; 12. Level. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] This invention provides, for example Figure 1-9The illustrated printing circuit board copper plating polishing device includes an integrated housing 1, a polishing machine body 3, a mounting structure 4, a limiting structure 5, and an adjusting structure 6. The integrated housing 1 is used to mount a pneumatic rotary motor 41 and the polishing machine body 3. The polishing machine body 3 is located at the bottom of the integrated housing 1. By rotating the polishing machine body 3, its bottom end polishes the copper plating of the circuit board. The mounting structure 4 is located between the polishing machine body 3 and the integrated housing 1. The mounting structure 4 is used to install and connect the polishing machine body 3 and the integrated housing 1 to ensure the smooth operation of the polishing machine. Stable operation of the main body 3; the limiting structure 5 is set on the outside of the grinding machine main body 3, and the limiting structure 5 is used to limit the grinding thickness of the grinding machine main body 3, so as to facilitate the control of the grinding thickness and improve the work efficiency; the adjusting structure 6 is set on the integrated housing 1, and the adjusting structure 6 is used to adjust the angle of the grinding machine main body 3, so that the grinding machine main body 3 is set at an inclined angle, and the inclined end face of the grinding machine main body 3 is used to perform small-area grinding on the copper plating of the circuit board, and it is convenient to stabilize the grinding machine main body 3 and improve the stability of grinding.

[0028] Specifically, the mounting structure 4 includes a pneumatic rotary motor 41, a mounting shaft 42, a connector 43, a connecting shaft 44, and a connecting groove 45. The pneumatic rotary motor 41 is housed within the integrated housing 1, and its output end is connected to the grinding machine body 3. The pneumatic rotary motor 41 is a vane-type pneumatic motor, which converts the energy of compressed air into mechanical rotational motion. Its core working principle is based on compressed air driving the vanes on the rotor to generate torque. High-pressure air enters the chamber between the stator and rotor through the air inlet. Centrifugal force and air pressure cause the vanes to adhere tightly to the inner wall of the stator, forming a sealed working chamber. Air pressure acts on the vane surface, driving the rotor to rotate. One end of the mounting shaft 42 is fixedly connected to the outer wall of the pneumatic rotary motor 41, and the other end is rotatably connected to the inner wall of the integrated housing 1. The pneumatic rotary motor 41 is rotatably connected to the inner wall of the integrated housing 1 through the mounting shaft 42, allowing the pneumatic rotary motor 41 to rotate around the mounting shaft 42, facilitating the operation of the pneumatic rotary motor 41. The angle of the grinding machine body 3 is adjusted; the connector 43 is set in the inner cavity of the integrated housing 1, and the connector 43 is rotatably interlocked with the connection position of the pneumatic rotary motor 41 and the grinding machine body 3. The connector 43 swings together with the pneumatic rotary motor 41, and the output end of the pneumatic rotary motor 41 and the end of the grinding machine body 3 rotate on the connector 43 to support the grinding machine body 3; the connecting shaft 44 is fixedly connected to the outer wall of the connector 43, and the connecting shaft 44 rotates together with the connector 43; the connecting groove 45 is opened on the inner wall of the integrated housing 1, and the connecting groove 45 is slidably interlocked with the connecting shaft 44. The connecting groove 45 is arc-shaped and is used to install the connecting shaft 44. As the pneumatic rotary motor 41 and the grinding machine body 3 rotate, the connector 43 rotates together, and the connecting shaft 44 slides along the inner cavity of the connecting groove 45. The inner wall of the connecting groove 45 supports the connecting shaft 44 and the connector 43, improving the stability of the grinding machine body 3.

[0029] In particular, the limiting structure 5 includes a mounting base 51, a limiting ring 52, a rubber ring 53, a mounting groove 54, a movable rod 55, a movable groove 56, a pointer 57, a compression spring 58, and a compression block 59. The mounting base 51 is fixedly connected to the lower surface of the integrated housing 1. An external thread is provided on the outer wall of the mounting base 51. The mounting base 51 is annular in shape and is used to mount the limiting ring 52. The limiting ring 52 is located outside the grinding machine body 3. The top of the inner wall of the limiting ring 52 is threadedly connected to the outer wall of the mounting base 51. The limiting ring 52 is convex in shape, and an internal thread is provided on the top of the inner wall of the limiting ring 52, which engages with the external thread on the outer wall of the mounting base 51, allowing the limiting ring 52 to move threadedly on the mounting base 51. By rotating the limiting ring 52, it moves vertically along the mounting base 51, adjusting the position of the bottom end of the limiting ring 52. This changes the distance between the bottom end of the grinding machine body 3 and the bottom end of the limiting ring 52. As the grinding machine body 3 grinds the copper plating on the circuit board, the bottom end of the grinding machine body 3 and the limiting ring 52 move downwards together. When the bottom end of the limiting ring 52 contacts the surface of the circuit board, it restricts the movement of the grinding machine body 3, preventing it from continuing to move downwards for grinding. This achieves the purpose of controlling the grinding thickness and improving the efficiency of the grinding operation. The rubber ring 53 is fixedly connected to the bottom end of the limiting ring 52. The bottom end of the limiting ring 52 contacts the surface of the circuit board through the rubber ring 53, reducing the impact on the circuit board. Damage; Mounting groove 54 is formed on the integrated housing 1, located on the front side of the integrated housing 1, for mounting the movable rod 55; the movable rod 55 is slidably inserted into the mounting groove 54, with its bottom end abutting against the top end of the limiting ring 52. The movable rod 55 moves vertically within the mounting groove 54, driving the pointer 57 to move. When the limiting ring 52 moves upward, its top end presses upward against the bottom end of the movable rod 55; Movable groove 56 is formed on the front side of the integrated housing 1, for the movement of the pointer 57; the pointer 57 is fixedly connected to the top of the movable rod 55, and slides between the pointer 57 and the movable groove 56. The pointer 57 moves vertically with the movable rod 55. The movement direction is referenced to the scale lines on the front of the integrated housing 1, which facilitates the adjustment of the movement distance of the limiting ring 52; the compression spring 58 is set at the bottom of the inner cavity of the mounting groove 54, and the compression spring 58 is movably sleeved with the bottom of the movable rod 55. The compression spring 58 is always in a compressed state. Utilizing the elasticity of the compression spring 58, the movable rod 55 is pushed downward, so that the bottom end of the movable rod 55 is tightly fitted with the top end of the limiting ring 52; the compression block 59 is fixedly connected to the bottom of the movable rod 55, and the upper surface of the compression block 59 is in contact with the bottom end of the compression spring 58. When the movable rod 55 moves upward, it causes the compression block 59 to compress and deform the compression spring 58, and utilizes the elasticity of the compression spring 58 to push the compression block 59 downward.

[0030] Furthermore, the adjustment structure 6 includes a fixed block 61, a mounting cavity 62, a movable block 63, a connecting column 64, a sliding groove 65, a rotating disk 66, a fixed shaft 67, a pressing groove 68, a fixed column 69, a connecting block 610, a positioning groove 611, an adjusting screw 612, a mounting head 613, a positioning block 614, a limiting block 615, and a support block 616. The fixed block 61 is fixedly connected to one side of the outer wall of the pneumatic rotary motor 41. The fixed block 61 is elongated and moves together with the pneumatic rotary motor 41. The mounting cavity 62 is opened on the handle 2 and is used to accommodate the movable block 63 and the rotating disk 66. The movable block 63 is slidably inserted into the mounting cavity 62 and moves horizontally within the mounting cavity 62. The two movable blocks 63 are arranged vertically, driving the pneumatic rotary motor 41 and the fixed block 61 to rotate. As the fixed block 61 rotates, a connecting column 64 is fixedly connected to one end of the movable block 63 and moves horizontally with it, pushing the fixed block 61 and the pneumatic rotary motor 41 to move. A sliding groove 65 is formed in the fixed block 61, slidingly interlocking with the connecting column 64. The sliding groove 65 is used to install the connecting column 64. As the movable block 63 moves horizontally, the connecting column 64 moves relative to the inner wall of the sliding groove 65, pressing against it and pushing the fixed block 61 and the pneumatic rotary motor 41. The two movable blocks 63 move in opposite directions. A rotating disk 6... A rotating disk 66 is installed inside the mounting cavity 62, used to drive two movable blocks 63 to move together. A fixed shaft 67 is fixedly connected to the center of the rotating disk 66, with one end of the fixed shaft 67 rotatably connected to the inner wall of the mounting cavity 62. The rotating disk 66 is rotatably connected to the mounting cavity 62 via the fixed shaft 67 and rotates around the fixed shaft 67. An extrusion groove 68 is symmetrically arranged on the rotating disk 66, used to install a fixed post 69 and push the fixed post 69 to move. The fixed post 69 is fixedly connected to the other end of the movable block 63, and the fixed post 69 and the extrusion groove 68 are slidably interlocked. The fixed post 69 is used to connect the movable block 63 and the rotating disk 66. Through the rotation of the rotating disk 66, the extrusion groove 68 is used to move the fixed post 63. The column 69 presses and pushes, causing the two movable blocks 63 to move horizontally in opposite directions. The connecting column 64 moves together with the movable blocks 63, pressing against the sliding groove 65 and pushing the fixed block 61 and the pneumatic rotary motor 41 to rotate. One end of the connecting block 610 is fixedly connected to the bottom of the rotating disk 66. The connecting block 610 and the mounting cavity 62 are slidably interlocked. The connecting block 610 is elongated and used to drive the rotating disk 66 to rotate. The positioning groove 611 is provided on the connecting block 610 and is used to install the positioning block 614. The adjusting screw 612 is provided below the connecting block 610 and is located at the bottom of the handle 2. By adjusting the thread movement of the adjusting screw 612, the positioning block 614 is driven to move horizontally.Mounting head 613 is rotatably connected to one end of adjusting screw 612. Mounting head 613 connects adjusting screw 612 and positioning block 614, preventing positioning block 614 from rotating with adjusting screw 612. Positioning block 614 is fixedly connected to the outer wall of mounting head 613. Positioning block 614 is slidably inserted into positioning groove 611. Positioning block 614 connects rotating disk 66 and adjusting screw 612, and is used to press and push connecting block 610, thereby causing connecting block 610 and rotating disk 66 to rotate together. Limiting block 615 is fixedly connected to one end of positioning block 614. Limiting block 615 fits against the outer wall of connecting block 610. Limiting block 615 limits one end of positioning block 614, preventing positioning block 614 from separating from positioning groove 611. The top end of support block 616 is fixedly connected to the inner wall of mounting cavity 62. Support block 616 is connected to adjusting screw 612. The screw connection is used, with support block 616 for mounting adjusting screw 612. Adjusting screw 612 moves threadedly on support block 616. Rotating adjusting screw 612 causes positioning block 614 to move horizontally. Positioning block 614 presses against the inner wall of positioning groove 611, pushing connecting block 610 and rotating disk 66 to rotate. Pressing groove 68 on rotating disk 66 presses against fixed column 69, causing two movable blocks 63 to move horizontally in opposite directions. Connecting column 64 moves with movable block 63, pressing against sliding groove 65, pushing fixed block 61 and pneumatic rotary motor 41 to rotate. This causes pneumatic rotary motor 41 to rotate around mounting shaft 42, adjusting the tilt angle between pneumatic rotary motor 41 and the grinding machine body 3, facilitating small-area grinding of copper plating on circuit boards. Simultaneously, the two movable blocks 63 limit the fixed block 61, ensuring stable operation of pneumatic rotary motor 41.

[0031] Both sides of the limiting ring 52 are threaded with bolts 7. The bolts 7 move together with the limiting ring 52 and are used to install the pressing block 8. The bolts 7 move threadedly on the limiting ring 52, and one end of the bolt 7 is rotatably connected to the pressing block 8. The pressing block 8 is arranged in an arc shape and is used to press against the inner wall of the annular groove 9. By rotating and tightening the bolts 7, the pressing block 8 is driven to press against the inner wall of the annular groove 9, increasing the resistance between the limiting ring 52 and the mounting base 51, and thus pressing and fixing the limiting ring 52 to ensure... To ensure the stability of the limiting ring 52, an annular groove 9 is provided at the bottom of the mounting base 51. The annular groove 9 and the extrusion block 8 are slidably interlocked. The annular groove 9 is used to accommodate the extrusion block 8. When the limiting ring 52 rotates on the mounting base 51, it drives the extrusion block 8 to slide in the annular groove 9. One side of the extrusion block 8 is in contact with the inner wall of the annular groove 9. By utilizing the contact between the extrusion block 8 and the annular groove 9, the extrusion block 8 cannot rotate around the bolt 7 in the annular groove 9, thus ensuring the stable movement of the extrusion block 8 in the horizontal direction.

[0032] The integrated housing 1 consists of a polisher housing and a handle 2. The handle 2 is fixedly connected to the outer wall of the polisher housing. By holding the handle 2, the integrated housing 1 is moved to polish the copper plating on the circuit board. A start switch 10 is fixedly installed at the bottom of one end of the handle 2. The start switch 10 is connected to the pneumatic rotary motor 41 and an external power supply via a connecting wire. By pressing the start switch 10, the pneumatic rotary motor 41 is connected to an external air compressor, allowing high-pressure gas to enter the pneumatic rotary motor 41. A pneumatic speed control valve 11 is fixedly connected to the other end of the handle 2. The pneumatic rotary motor 41 is fixedly connected to one end of the pneumatic speed control valve 11 via a hose. The pneumatic speed control valve 11 controls the flow of pneumatic gas into the motor. The air pressure inside the rotary motor 41 is adjusted to regulate the gas flow rate, thereby adjusting the rotation speed of the pneumatic rotary motor 41. A level 12 is fixedly installed on the upper surface of the integrated housing 1. When the handle 2 is set horizontally, the level 12 is observed to ensure that the integrated housing 1 remains horizontal, and the grinder body 3 is tilted. The front of the integrated housing 1 is provided with scale lines, which correspond to the position of the pointer 57. The adjustment distance of the limit ring 52 is controlled by the cooperation between the pointer 57 and the scale lines. The movable block 63 is set vertically, and the rotating disk 66 is set on one side of the movable block 63. The rotating disk 66 drives the two movable blocks 63 to move together.

[0033] The working principle of this invention is as follows: By rotating the limiting ring 52, it rotates threadedly on the mounting base 51, changing the position of the limiting ring 52. The movable rod 55 moves vertically with the movement of the limiting ring 52, causing the pointer 57 to move vertically on the front of the integrated housing 1, matching the scale line, thus controlling the adjustment distance of the limiting ring 52. This changes the distance between the bottom end of the grinding machine body 3 and the bottom end of the limiting ring 52. As the grinding machine body 3 grinds the copper plating on the circuit board, the bottom end of the grinding machine body 3 and the limiting ring 52 move downward together. When the bottom end of the limiting ring 52 contacts the surface of the circuit board, it limits the movement of the grinding machine body 3, preventing it from continuing to move downward for grinding, thereby controlling the grinding thickness and improving the efficiency of the grinding operation. When a small area grinding operation is required on the copper plating on the circuit board, rotating the adjusting screw 612 causes the positioning block 614 to move horizontally. The positioning block 614 aligns with the positioning groove. The inner wall of 611 is pressed together, pushing the connecting block 610 and the rotating disk 66 to rotate. The pressing groove 68 on the rotating disk 66 presses and pushes the fixed column 69, causing the two movable blocks 63 to move horizontally in opposite directions. The inclined surface of one movable block 63 presses and pushes the fixed block 61, while the other movable block 63 limits and supports the fixed block 61, so that the pneumatic rotary motor 41 rotates around the mounting shaft 42. The tilt angle of the pneumatic rotary motor 41 and the grinding machine body 3 can be adjusted to facilitate small-area grinding of the copper on the circuit board and to facilitate stable control of the grinding machine body 3, thus improving the stability of grinding. Then, turn on the air pipe switch, hold the handle 2 to move the integrated housing 1, place the grinding machine body 3 in the position to be ground, press the start switch 10, connect the pneumatic rotary motor 41 to the external air compressor, so that high-pressure gas enters the pneumatic rotary motor 41 and drives the grinding machine body 3 to rotate and grind.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A polishing device for copper coating on printed circuit boards, characterized in that, include: Integrated housing (1); The grinding machine body (3) is located at the bottom of the integrated housing (1); The mounting structure (4) is disposed between the grinding machine body (3) and the integrated housing (1), and the mounting structure (4) is used to rotate the grinding machine body (3) into the integrated housing (1); A limiting structure (5) is provided on the outside of the grinding machine body (3), and the limiting structure (5) is used to limit the grinding thickness of the grinding machine body (3); An adjustment structure (6) is provided on the integrated housing (1) and is used to adjust the angle of the grinding machine body (3).

2. The printed circuit board copper coating polishing device according to claim 1, characterized in that, The mounting structure (4) includes: A pneumatic rotary motor (41) is installed inside an integrated housing (1), and the output end of the pneumatic rotary motor (41) is connected to the main body (3) of the grinder. Mounting shaft (42), one end of which is fixedly connected to the outer wall of pneumatic rotary motor (41), and the other end of which is rotatably connected to the inner wall of integrated housing (1); Connector (43), the connector (43) is disposed in the inner cavity of the integrated housing (1), and the connection position of the connector (43) with the pneumatic rotary motor (41) and the grinding machine body (3) is rotatably interlocked; A connecting shaft (44) is fixedly connected to the outer wall of the connector (43); The connecting groove (45) is opened on the inner wall of the integrated housing (1). The connecting groove (45) and the connecting shaft (44) are slidably intersected. The connecting groove (45) is arc-shaped.

3. The printed circuit board copper coating polishing device according to claim 1, characterized in that, The limiting structure (5) includes: Mounting base (51), which is fixedly connected to the lower surface of the integrated housing (1), and the outer wall of the mounting base (51) is provided with external threads; The limiting ring (52) is located on the outside of the grinding machine body (3). The top of the inner wall of the limiting ring (52) is threaded to the outer wall of the mounting base (51). The limiting ring (52) is convex in shape. A rubber ring (53) is fixedly connected to the bottom end of a limiting ring (52).

4. The printed circuit board copper coating polishing device according to claim 3, characterized in that, The limiting structure (5) also includes: Mounting slot (54) is formed on the integrated housing (1); Movable rod (55), which is slidably inserted into the mounting groove (54), with the bottom end of the movable rod (55) fitting against the top end of the limiting ring (52); The movable groove (56) is formed on the front of the integrated housing (1); The pointer (57) is fixedly connected to the top of the movable rod (55), and the pointer (57) and the movable groove (56) are slidably interlocked. Compression spring (58), the compression spring (58) is disposed at the bottom of the inner cavity of the mounting groove (54), and the compression spring (58) is movably sleeved with the bottom of the movable rod (55); Compression block (59) is fixedly connected to the bottom of movable rod (55), and the upper surface of compression block (59) is in contact with the bottom end of compression spring (58).

5. The printed circuit board copper coating polishing device according to claim 4, characterized in that, The adjustment structure (6) includes: A fixing block (61) is fixedly connected to one side of the outer wall of the pneumatic rotary motor (41), and the fixing block (61) is arranged in a long strip shape; Mounting cavity (62) is located on the back side of integrated housing (1); Movable block (63), which is slidably inserted into the mounting cavity (62), and is located on one side of the pneumatic rotary motor (41); A connecting post (64) is fixedly connected to one end of the movable block (63); The sliding groove (65) is formed on the fixed block (61), and the sliding groove (65) and the connecting column (64) are slidably intersected.

6. The printed circuit board copper coating polishing device according to claim 5, characterized in that, The adjustment structure (6) also includes: A rotating disk (66) is disposed within the mounting cavity (62); A fixed shaft (67) is fixedly connected to the center of the rotating disk (66), and one end of the fixed shaft (67) is rotatably connected to the inner wall of the mounting cavity (62). Extrusion grooves (68) are symmetrically arranged on the rotating disk (66); A fixed column (69) is fixedly connected to the other end of the movable block (63), and the fixed column (69) and the extrusion groove (68) are slidably interlocked. A connecting block (610) is fixedly connected at one end to the bottom of the rotating disk (66), and the connecting block (610) and the mounting cavity (62) are slidably interlocked.

7. The printed circuit board copper coating polishing device according to claim 6, characterized in that, The adjustment structure (6) also includes: A positioning groove (611) is provided on the connecting block (610); An adjusting screw (612) is provided below the connecting block (610); Mounting head (613), which is rotatably connected to one end of adjusting screw (612); Positioning block (614), the positioning block (614) is fixedly connected to the outer wall of the mounting head (613), and the positioning block (614) and the positioning groove (611) are slidably interlocked; A limiting block (615) is fixedly connected to one end of a positioning block (614), and the limiting block (615) is in contact with the outer wall of the connecting block (610). The top end of the support block (616) is fixedly connected to the inner wall of the mounting cavity (62), and the support block (616) is threadedly connected to the adjusting screw (612).

8. The printed circuit board copper coating polishing device according to claim 4, characterized in that, Both sides of the limiting ring (52) are threaded with bolts (7), and one end of the bolt (7) is rotatably connected to an extrusion block (8). The extrusion block (8) is arranged in an arc shape. The bottom end of the mounting base (51) is provided with an annular groove (9). The annular groove (9) and the extrusion block (8) are slidably interlocked. One side of the extrusion block (8) is in contact with the inner wall of the annular groove (9).

9. A polishing device for copper coating on printed circuit boards according to claim 2, characterized in that, The integrated housing (1) consists of a grinding machine housing and a handle (2). The handle (2) is fixedly connected to the outer wall of the grinding machine housing. A start switch (10) is fixedly installed at the bottom of one end of the handle (2). A pneumatic speed control valve (11) is fixedly connected to the other end of the handle (2). The pneumatic rotary motor (41) is fixedly connected to one end of the pneumatic speed control valve (11) through a hose. A level (12) is fixedly installed on the upper surface of the integrated housing (1).

10. A polishing device for copper coating on printed circuit boards according to claim 6, characterized in that, The integrated housing (1) has scale lines on its front side, which correspond to the position of the pointer (57). The movable block (63) is arranged vertically, and the rotating disk (66) is located on one side of the movable block (63).

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