Pin cutter for circuit board production

Abstract

The utility model discloses a pin cutter for circuit board production, which comprises a rack, the top of the rack is provided with a mounting groove, the mounting groove is internally connected with a heat dissipation blade module through a bearing, the heat dissipation blade module comprises a heat dissipation tool bit and a tool bit rotating shaft, the heat dissipation tool bit comprises a cold head and a tool, the end face of the cold head is provided with a blade flow guide structure, and the blade flow guide structure is connected with the heat dissipation tool bit rotating shaft through a bearing. A circle of mounting part is arranged on the periphery of the blade flow guide structure, and uniformly distributed threaded holes are formed in the mounting part. A first flow guide through hole and a second flow guide through hole are formed in the tool bit rotating shaft in the axis direction in a penetrating mode, a circular flow blocking part is integrally formed on one end face of the tool bit rotating shaft, and a certain annular gap is formed between the flow blocking part and a tool bit rotating shaft body. And the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of electronic manufacturing equipment technology, specifically relating to a lead cutting machine for circuit board production. Background Technology

[0002] In the production of electronic circuit boards (PCBs), lead cutting is one of the key processes, directly affecting the accuracy of subsequent component insertion, soldering, and overall assembly. With the development of technologies such as 5G communication and the Internet of Things, PCBs are showing a trend towards higher density, multi-layering, and refinement, which places higher demands on lead cutting.

[0003] Existing lead cutting equipment generally lacks dedicated heat dissipation for the cutting tools, and natural ventilation has low efficiency and poor uniformity in heat dissipation. These defects have resulted in a lead cutting yield of circuit boards being below 95% for a long time, becoming a technical bottleneck restricting efficient and precise machining. Therefore, there is an urgent need for a lead cutting machine for circuit board production to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to propose a lead-cutting machine for circuit board production, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a lead cutting machine for circuit board production, including a frame.

[0006] This utility model further illustrates that the top of the frame is provided with an installation groove, and a heat dissipation blade module is connected to the installation groove through a bearing. The heat dissipation blade module includes a heat dissipation blade head and a blade head shaft. The heat dissipation blade head includes a cold head and a blade. A blade guide structure is provided on the end face of the cold head. A ring of mounting parts is provided around the blade guide structure. The mounting parts are installed in the installation groove through a bearing. The mounting parts are provided with evenly distributed threaded holes.

[0007] This utility model further illustrates that the end face of the cutter head shaft is provided with a sealing hole corresponding to the threaded hole, and the sealing hole mates with the threaded hole; the cutter head shaft is provided with a first guide hole and a second guide hole through it along the axial direction; a circular baffle is integrally formed on one end face of the cutter head shaft, and the baffle forms a certain annular gap with the cutter head shaft body; the first guide hole passes through the baffle; a transmission groove is milled on the side of the cutter head shaft, and the transmission groove is connected to an external transmission mechanism via a transmission belt.

[0008] This utility model further illustrates that the other end of the cutter head shaft is connected to a rotary joint via a flange. The rotary joint is fixed to the frame by bolts. The rotary joint is provided with a water inlet and a water outlet. The water inlet of the rotary joint is coaxially connected to the first guide hole, and the water outlet of the rotary joint is coaxially connected to the second guide hole.

[0009] This utility model further illustrates that the mounting part is sealed to the cutter head shaft by bolts, the flow-blocking part is closely fitted to the blade guide structure, the radius of the flow-blocking part is smaller than that of the mounting part, and a gap is formed between the flow-blocking part and the mounting part to allow coolant to pass through.

[0010] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model achieves efficient circulation and heat dissipation of coolant through the cold head blade guide structure and the double guide flow hole design of the blade shaft, thereby reducing thermal stress and extending the tool life; the entire device improves the efficiency and accuracy of circuit board lead cutting, extends the tool life, reduces maintenance costs, and solves the problems of low heat dissipation efficiency of traditional lead cutting machines, which leads to easy tool wear, complex structure and inconvenient maintenance, and time-consuming tool replacement that affects production progress. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is an exploded view of the present invention;

[0014] Figure 3 This is a schematic diagram of the heat sink blade module related to this utility model;

[0015] Figure 4 This is a side view and cross-sectional view of the present invention;

[0016] Figure 5 This is a partially enlarged schematic diagram of the present invention;

[0017] Figure 6 This is a schematic diagram of the heat dissipation blade of this utility model;

[0018] In the diagram: 1. Frame; 12. Mounting slot; 2. Heat sink blade module; 21. Heat sink blade head; 22. Blade head shaft; 211. Cold head; 212. Blade; 2112. Blade guide structure; 2113. Mounting part; 21131. Threaded hole; 221. First guide hole; 222. Second guide hole; 223. Baffle part; 224. Annular gap; 225. Transmission groove; 226. Sealing hole; 3. Rotary joint; 31. Water inlet; 32. Water outlet; 4. Servo motor. Detailed Implementation

[0019] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-6 This utility model provides a technical solution: a lead cutting machine for circuit board production, including a frame 1. The top of the frame 1 is provided with a mounting groove 12. A heat dissipation blade module 2 is connected to the mounting groove 12 through a bearing. The heat dissipation blade module 2 includes a heat dissipation blade head 21 and a blade head rotating shaft 22. The heat dissipation blade head 21 includes a cold head 211 and a cutting tool 212. The cutting tool 212 and the cold head 211 are tightly connected to the end of the cold head 211 by bolts. A blade guide structure 2112 is provided on the end face of the cold head 211. The blade guide structure 2112 can guide the coolant. A ring of mounting parts 2113 is provided around the blade guide structure 2112. The mounting parts 2113 are installed in the mounting groove 12 through bearings. The mounting parts 2113 are provided with evenly distributed threaded holes 21131. The threaded holes 21131 are used to connect with the blade head rotating shaft 22.

[0021] A sealing hole 226 corresponding to the threaded hole 21131 is opened on the end face of the cutter head shaft 22. The sealing hole 226 and the threaded hole 21131 are matched to realize the sealed connection between the heat dissipation cutter head 21 and the cutter head shaft 22. The cutter head shaft 22 is provided with a first guide hole 221 and a second guide hole 222 through it along the axial direction to provide a channel for the circulation of coolant. A circular baffle part 223 is integrally formed on one end face of the cutter head shaft 22. The baffle part 223 and the cutter head shaft 22 body form a certain annular gap 224. The annular gap 224 allows coolant to pass through. The first guide hole 221 passes through the baffle part 223. A transmission groove 225 is opened on the side of the cutter head shaft 22. The transmission groove 225 is connected to the servo motor 4 through the transmission belt. The servo motor 4 is mounted on the frame 1 by bolts.

[0022] The other end of the cutter head shaft 22 is connected to a rotary joint 3 via a flange. The rotary joint 3 is fixed to the frame 1 by bolts. The rotary joint 3 is provided with a water inlet 31 and a water outlet 32. The water inlet 31 of the rotary joint 3 is coaxially connected to the first guide hole 221, and the water outlet 32 ​​of the rotary joint 3 is coaxially connected to the second guide hole 222 to ensure that the coolant can circulate smoothly.

[0023] When installing the heat dissipation blade 21, the mounting part 2113 is sealed to the blade shaft 22 by bolts. The baffle part 223 is tightly fitted to the blade guide structure 2112. The radius of the baffle part 223 is smaller than that of the mounting part 2113, and a gap is formed between the baffle part 223 and the mounting part 2113 to allow the coolant to pass through. When the equipment is running, the coolant enters the blade guide structure 2112 through the first guide hole 221. Since the baffle part 223 blocks the coolant from flowing to the surrounding area on the blade guide structure 2112, when the coolant flows to the edge of the baffle part 223, it enters the annular gap 224 through the gap between the baffle part 223 and the mounting part 2113, and enters the second guide hole 222 in the annular gap 224, forming a backflow.

[0024] Working principle:

[0025] When the equipment is started, the external transmission mechanism is connected to the transmission groove 225 on the side of the cutter head shaft 22 via the transmission belt, and transmits power to the cutter head shaft 22, causing it to start rotating.

[0026] The cutting head shaft 22 rotates stably within the mounting slot 12 of the frame 1 via bearings, driving the connected heat dissipation cutting head 21 to rotate as well. The circuit board to be processed is placed at a designated position on the frame 1, with its pins aligned with the rotating cutting head 212. As the heat dissipation cutting head 21 rotates at high speed, the cutting head 212 contacts the circuit board pins, cutting them off through the shearing action of the blade. The cut pins, under the rotational inertia of the cutting head 212, detach from the circuit board, completing the pin-cutting operation. Throughout the entire operation of the equipment, the heat dissipation cutting head 21 continuously rotates with the cutting head shaft 22, generating heat during the pin-cutting operation on the circuit board.

[0027] At the same time, the rotary joint 3 starts to work, and the coolant enters through the inlet 31 of the rotary joint 3 via the external reservoir. Since the inlet 31 is coaxially connected to the first guide hole 221, the coolant flows smoothly into the first guide hole 221. The coolant flows forward along the first guide hole 221 and reaches the end of the cutter head shaft 22 with the baffle 223. The first guide hole 221 passes through the baffle 223. After the coolant flows out of the first guide hole 221, it is blocked by the baffle 223 and cannot flow randomly in all directions. Instead, it is guided to the blade guide structure 2112.

[0028] On the blade guide structure 2112, the coolant flows in all directions according to the design direction of the structure. When the coolant flows to the edge of the baffle 223, since the radius of the baffle 223 is smaller than that of the mounting part 2113, a gap is formed between the baffle 223 and the mounting part 2113 that allows the coolant to pass through. The coolant enters the annular gap 224 formed by the baffle 223 and the cutter head shaft 22 body through this gap.

[0029] The coolant entering the annular gap 224 continues to flow and enters the second guide hole 222. Since the outlet 32 ​​of the rotary joint 3 is coaxially connected with the second guide hole 222, the coolant flows into the outlet 32 ​​of the rotary joint 3 through the second guide hole 222, completing the coolant circulation process.

[0030] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lead-cutting machine for circuit board production, comprising a frame (1), characterized in that: The top of the frame (1) is provided with a mounting groove (12). A heat dissipation blade module (2) is connected to the mounting groove (12) by a bearing. The heat dissipation blade module (2) includes a heat dissipation blade head (21) and a blade head shaft (22). The heat dissipation blade head (21) includes a cold head (211) and a blade (212). The blade (212) and the cold head (211) are connected to the end of the cold head (211) by bolts. A blade guide structure (2112) is provided on the end face of the cold head (211). A ring of mounting parts (2113) is provided around the blade guide structure (2112). The mounting parts (2113) are installed in the mounting groove (12) by bearings. The mounting parts (2113) are provided with evenly distributed threaded holes (21131).

2. The lead-cutting machine for circuit board production according to claim 1, characterized in that: The end face of the cutter head shaft (22) is provided with a sealing hole (226) corresponding to the threaded hole (21131), and the sealing hole (226) is engaged with the threaded hole (21131); the cutter head shaft (22) is provided with a first guide hole (221) and a second guide hole (222) through it along the axial direction; a circular baffle (223) is integrally formed on one end face of the cutter head shaft (22), and the baffle (223) forms a certain annular gap (224) with the cutter head shaft (22) body; the first guide hole (221) passes through the baffle (223); and a transmission groove (225) is provided on the side of the cutter head shaft (22).

3. The lead-cutting machine for circuit board production according to claim 2, characterized in that: The other end of the cutter head shaft (22) is connected to a rotary joint (3) via a flange, and the rotary joint (3) is fixed to the frame (1) by bolts.

4. The lead-cutting machine for circuit board production according to claim 3, characterized in that: The mounting part (2113) is sealed to the blade shaft (22) by bolts. The baffle part (223) fits tightly against the blade guide structure (2112). The radius of the baffle part (223) is smaller than that of the mounting part (2113). A gap is formed between the baffle part (223) and the mounting part (2113) to allow coolant to pass through.

5. The lead-cutting machine for circuit board production according to claim 4, characterized in that: The transmission groove (225) is connected to a servo motor (4) via a transmission belt, and the servo motor (4) is mounted on the frame (1) by bolts.

6. The lead-cutting machine for circuit board production according to claim 5, characterized in that: The rotary joint (3) is provided with an inlet (31) and an outlet (32). The inlet (31) of the rotary joint (3) is coaxially connected to the first guide hole (221), and the outlet (32) of the rotary joint (3) is coaxially connected to the second guide hole (222).

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