Cutting and grinding integrated cutter for thick PCB (printed circuit board)
By designing cutting teeth and grinding teeth with specific angles and thicknesses, the problems of board jamming and scratches during PCB board cutting and grinding are solved, resulting in smooth board edges and a low scrap rate.
Patent Information
- Application Number
- CN202423067208.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-11
AI Technical Summary
In existing technologies, when cutting and grinding PCB boards, the small bevel angle of the board edges makes it easy for the boards to jam and scratch the rollers during transportation, resulting in a high product scrap rate and the risk of injury to operators.
Design a PCB thick board cutting and grinding integrated blade with a cutting tooth angle of 35±3°, a grinding tooth angle of 76±3°, a radius difference of 0.9mm, thicknesses of 5±0.2mm and 3±0.2mm respectively, and front and back angles of 11±3° and 14±4° respectively, to achieve the combination of cutting and grinding.
It improves the smoothness of PCB board edges, avoids damage to the board and rollers, and reduces product scrap rate and operator injury risk.
Smart Images
Figure CN223600107U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to PCB board production and processing equipment technical field especially relates to a kind of PCB thick plate cutting and grinding integrated cutter. BACKGROUND
[0002] For the PCB board after completing pressing, it needs to adopt cutting and grinding processing line to cut and grind the PCB board. In the prior art, cutting and grinding integrated cutter is generally used to cut and grind the PCB board, specifically, the saw blade is installed on the shaft rotating device of cutting and grinding machine, and the saw blade is rotated by motor and shaft transmission, so that the PCB board is cut by the cutting teeth of saw blade, and the edge is ground by the grinding teeth of saw blade.
[0003] However, the cutting and grinding integrated cutter used in the prior art has the following disadvantages: when cutting 4-6.5mm PCB board, the step difference between the grinding teeth and the cutting teeth is 1.8mm, the angle of the grinding teeth is designed as 45°, the bevel angle of the cut board is small, and the slope width is small, so that the cut PCB board is easy to be clamped during subsequent horizontal conveying. In addition, due to the small slope width of the board edge, the convex angle of the board edge will hit the conveying roller when the conveying speed is too fast, and the damaged conveying roller is easy to scratch the board surface of the PCB board.
[0004] Therefore, the prior art has defects and needs to be improved. INVENTION CONTENTS
[0005] The utility model aims at overcoming the defects of the prior art, and provides a kind of PCB thick plate cutting and grinding integrated cutter.
[0006] The technical scheme of the utility model is as follows: a kind of PCB thick plate cutting and grinding integrated cutter is provided, comprising: cutter body, cutting tooth and grinding tooth arranged on the outer edge of the cutter body, the cutting tooth and the grinding tooth are alternately distributed on the outer edge of the cutter body, the cutting tooth angle is 35±3°, the grinding tooth angle is 76±3°, and the radius difference H of cutting tooth and grinding tooth is 0.9mm.
[0007] Further, the thickness of the cutting tooth is 5±0.2mm.
[0008] Further, the thickness of the grinding tooth is 3±0.2mm.
[0009] Further, the rake angle of the cutting tooth and the grinding tooth is 11±3°.
[0010] Further, the relief angle of the cutting tooth and the grinding tooth is 14±4°.
[0011] Further, the single-edge blade to the blade back side blade inclination angle of the cutting tooth and the grinding tooth is 3.5±1°.
[0012] With the above scheme, the cutting and grinding integrated cutter provided by the utility model can avoid the situation that the PCB board is easily damaged during the subsequent horizontal transportation, thereby avoiding the situation that the PCB board is scratched, and effectively reducing the product scrap rate. Meanwhile, the edge of the processed PCB board is smooth and has no burrs, thereby avoiding that the operator is scratched by the edge of the PCB board during the operation. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic view of the utility model.
[0014] Figure 2 It is a sectional view of the cutting tooth.
[0015] Figure 3 It is a sectional view of the edge grinding tooth.
[0016] Figure 4 It is a structural schematic view of the cutting tooth and the edge grinding tooth for cutting and edge grinding processing of the PCB board.
[0017] Figure 5 It is a sectional view of the edge of the PCB board after cutting and grinding. DETAILED DESCRIPTION
[0018] The utility model will be explained in detail in combination with the drawings and specific embodiments.
[0019] Please refer to Figures 1 to 3 The utility model provides a kind of PCB thick plate cutting and grinding integrated cutter, comprising: cutter body 1, cutting tooth 2 and edge grinding tooth 3 being arranged on the outer edge of the cutter body 1, the cutting tooth 2 and edge grinding tooth 3 are alternately distributed on the outer edge of cutter body 1, the cutting tooth 2 blade angle is 35±3 °, the blade angle of the edge grinding tooth 3 is 76±3 °, the radius difference H of cutting tooth 2 and edge grinding tooth 3 is 0.9mm.In some alternative embodiments, 18 cutting teeth 2 and 18 edge grinding teeth 3 are provided on cutter body 1, and cutting tooth 2 and edge grinding tooth 3 are alternately arranged on the outer edge of cutter body 1.
[0020] 76 ° of the edge grinding tooth 3 and the radius difference of the cutting tooth 2 of 35 ° are H=D1-D2, D1 is the radius of cutting tooth 2, and D2 is the radius of edge grinding tooth 3.When the radius difference H=0.9mm, the corresponding PCB board that can be cut has a thickness of 4-6.5mm.
[0021] The thickness of the cutting tooth 2 is 5±0.2mm. The thickness of the edge grinding tooth 3 is 3±0.2mm.
[0022] The rake angle of the cutting tooth 2 and the grinding tooth 3 is 11±3°.
[0023] The single-edge-to-back-side blade angle of the cutting tooth 2 and the grinding tooth 3 is 3.5±1°.
[0024] Please refer to Figure 4 、 Figure 5 When the cutting and grinding integrated cutter is used to process the PCB 4, the upper cutter and the lower cutter are installed on the cutting and grinding machine in a staggered manner, the lower cutter is located in front of the upper cutter, the motor and the coupling are used to drive the cutting and grinding integrated cutter to rotate, the upper and lower pressing plates are used to press and fix the board edge 41 of the PCB 4, and the part to be cut is left, and the upper and lower cutters are used to cut the board edge 41 of the PCB 4.
[0025] When the cutter body 1 rotates, the PCB 4 is cut by the cutting tooth 2 with an angle of 35°, and the board edge 41 of the cut PCB 4 is ground by the grinding tooth 3 with an angle of 76°, so that the cutting and grinding processes are completed at the same time during the rotation of the cutter body 1.
[0026] The PCB 4 with a half thickness is cut by the upper cutter and the lower cutter respectively, so that the board edge 41 is smooth and free of burrs after cutting and grinding, and meets the processing requirements of the cutting and grinding of the PCB 4.
[0027] Compared with the traditional cutting knife, the cutting and grinding integrated cutter provided by the utility model has a large inclination angle and a long slope of the board edge 41 of the PCB 4 after processing, so that the PCB 4 is not easy to be stuck during subsequent horizontal transportation, the damage to the roller is avoided, the scratching of the board surface of the PCB 4 is avoided, and the product scrap rate is effectively reduced. At the same time, the board edge 41 of the processed PCB 4 is smooth and free of burrs, so that the operator is not scratched by the board edge 41 of the PCB 4 during operation.
[0028] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A PCB thick board cutting and grinding integrated blade, characterized in that, include: The blade body comprises cutting teeth and grinding teeth disposed on the outer edge of the blade body. The cutting teeth and grinding teeth are alternately distributed on the outer edge of the blade body. The cutting edge angle of the cutting teeth is 35±3°, the cutting edge angle of the grinding teeth is 76±3°, and the radius difference H between the cutting teeth and the grinding teeth is 0.9mm.
2. The PCB thick board cutting and grinding integrated tool according to claim 1, characterized in that, The thickness of the cutting teeth is 5±0.2mm.
3. The PCB thick board cutting and grinding integrated tool according to claim 1, characterized in that, The thickness of the grinding teeth is 3±0.2mm.
4. The PCB thick board cutting and grinding integrated tool according to claim 1, characterized in that, The rake angle of the cutting teeth and the grinding teeth is 11±3°.
5. The PCB thick board cutting and grinding integrated tool according to claim 1, characterized in that, The back angle of the cutting teeth and the grinding teeth is 14±4°.
6. The PCB thick board cutting and grinding integrated tool according to claim 1, characterized in that, The angle between the single-sided cutting edge and the back edge of the cutting tooth and the grinding tooth is 3.5±1°.