A machining fixture for milling heat sinks

Abstract

This invention relates to a machining fixture for milling heat sinks, comprising a frame with a milling channel, a conveying device within the milling channel for transporting the part to be processed from one end of the milling channel to the other end, a first milling assembly for milling both sides of the heat sink and a second milling assembly for milling the upper surface of the heat sink within the milling channel, and a cutting assembly on the frame for cutting the milled heat sink into its final shape. By performing surface processing on the heat sink before cutting and shaping, the number of clamping operations can be reduced, and the product processing efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the technical field of heat sink processing, and in particular to a processing fixture for milling heat sinks. Background Technology

[0002] A heat sink is a device used to dissipate heat from electronic components in electrical appliances that are prone to overheating. They are mostly made of aluminum alloy, brass, or bronze and can be in the form of plates, sheets, or multiple sheets. For example, the CPU in a computer requires a fairly large heat sink, and the power transistors, horizontal output transistors, and power amplifier transistors in a television all require heat sinks.

[0003] Currently, heat sink processing requires milling the sides to ensure a beautiful appearance and burr-free surface. However, the current milling process for heat sinks requires clamping each shaped heat sink individually before milling, resulting in low processing efficiency. Summary of the Invention

[0004] To address the problem of low processing efficiency of heat sinks, this application provides a machining fixture for milling heat sinks.

[0005] The above-mentioned objective of the present invention is achieved through the following technical solution: a machining fixture for milling heat sinks, comprising a frame, a milling channel provided on the frame, a conveying device provided in the milling channel, the conveying device being used to transport the part to be processed from one end of the milling channel to the other end, a first milling component for milling both sides of the heat sink and a second milling component for milling the upper surface of the heat sink being provided in the milling channel, and a cutting component for cutting the milled heat sink into shape on the frame.

[0006] Preferably, the frame is provided with a first clamping part and a second clamping part. The first clamping part is used to clamp the heat sink along the vertical direction of the upper and lower sides of the heat sink, and the second clamping part is used to clamp the heat sink along the vertical direction of the two sides of the heat sink.

[0007] Preferably, the first clamping part is located downstream of the second clamping part along the milling channel direction, the first milling assembly is located downstream of the second milling assembly, the first milling assembly is used to process the heat sink clamped by the first clamping part, and the second milling assembly is used to process the heat sink clamped by the second clamping part.

[0008] Preferably, the first milling assembly includes a first tool holder slidably mounted on a frame along the conveying direction of the conveying device and a first milling cutter mounted on the first tool holder for milling the side of the heat sink, and the frame is provided with a first driving member for driving the first tool holder to slide.

[0009] Preferably, the second milling assembly includes a second tool holder slidably mounted on a frame along the conveying direction of the conveying device and a second milling cutter mounted on the second tool holder for milling the upper and lower surfaces of the heat sink, and the frame is provided with a second driving member for driving the second tool holder to slide.

[0010] Preferably, the frame is provided with a third clamping part, which is located downstream of the first clamping part. The cutting assembly is located between the first clamping part and the third clamping part. The third clamping part is used to clamp the heat sink away from the first clamping part when the cutting assembly is cutting.

[0011] Preferably, the cutting assembly includes a third blade holder and a rotary cutting saw blade located on the third blade holder for cutting heat sinks. The third blade holder is slidably mounted on the frame in a direction toward or away from the conveying device. The frame is provided with a third driving member for driving the third blade holder to slide.

[0012] Preferably, a slide is provided on the third tool holder along the heat sink conveying direction, and a fourth driving member is provided on the third tool holder to drive the slide to slide. The rotary cutting saw blade is located on the slide. The third clamping part includes clamping blocks located on both sides of the heat sink and a fifth driving member that drives the clamping blocks to clamp the heat sink. The fifth driving member is slidably mounted on the frame along the heat sink conveying direction. A sixth driving member is provided on the frame to drive the fifth driving member to slide. Milling cutter heads are provided on both sides of the rotary cutting saw blade. Multiple milling cutter heads are evenly distributed along the circumference of the rotary cutting saw blade. Along the radial direction of the rotary cutting saw blade, the distance between the milling cutter head and the outer circumference of the rotary cutting saw blade is greater than the outer diameter of the heat sink to be processed. The radius of the cutting saw blade is greater than twice the outer diameter of the heat sink to be processed. The distance between the milling cutter head and the rotation axis of the rotary cutting saw blade is greater than the outer diameter of the heat sink to be processed.

[0013] Preferably, one side of the rotary cutting saw blade is provided with a plurality of first grooves, and the other side of the rotary cutting saw blade is provided with a plurality of second grooves, and the milling cutter head is welded into the first grooves and the second grooves.

[0014] Preferably, the first groove and the second groove are arranged alternately on the rotary cutting saw blade, and the inner walls of the first groove and the second groove are provided with solder grooves, which are located between the first groove and the milling cutter head and the second groove and the milling cutter head.

[0015] By adopting the above technical solution, before cutting the heat sink into shape, the sides of the heat sink workpiece to be formed are first processed so that the upper end face and the front and rear sides of the heat sink are all flattened by milling cutter. Then, the flattened heat sink to be formed is cut into shape by cutting assembly. Multiple shaped heat sinks can be processed by clamping the heat sink to be processed only once, which improves work efficiency and reduces the error generated each time clamping, further improving the surface processing accuracy of the heat sink.

[0016] In summary, the present invention has at least one of the following beneficial technical effects:

[0017] 1. By performing surface processing on the heat sink before cutting and shaping, the number of clamping operations can be reduced, thereby improving product processing efficiency;

[0018] 2. By setting a milling cutter head on the rotary cutting saw blade, the cutting surface can be milled simultaneously when cutting the heat sink, improving the surface accuracy of the cutting surface. The cutting surface can meet the accuracy requirements without additional grinding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this embodiment.

[0020] Figure 2 This is a cross-sectional view of this embodiment.

[0021] Figure 3 This is a structural diagram of the cutting component.

[0022] Figure 4 This is a schematic diagram of the structure of a rotary cutting saw blade.

[0023] Figure 5 This is a schematic diagram of the structure of the first groove.

[0024] In the diagram, 1 is the frame; 2 is the milling channel; 3 is the conveying device; 4 is the first milling assembly; 411 is the first tool holder; 412 is the first milling cutter; 413 is the first drive component; 5 is the second milling assembly; 511 is the second tool holder; 512 is the second milling cutter; 513 is the second drive component; 6 is the cutting assembly; 611 is the third tool holder; 612 is the rotary cutting saw blade; 613 is the third drive component; 7 is the first clamping part; 711 is the first clamping cylinder. 712, First clamping plate; 8, Second clamping part; 811, Second clamping cylinder; 812, Second clamping plate; 9, Third clamping part; 911, Clamping block; 912, Fifth driving component; 10, Slide; 11, Fourth driving component; 12, Milling cutter head; 13, First groove; 14, Second groove; 15, Solder groove; 16, Sixth driving component; 17, Conveyor roller; 18, Fourth clamping part; 181, Pressure plate; 182, Seventh driving component. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Reference Figure 1 , 2 A machining fixture for milling heat sinks includes a frame 1 and a milling channel 2 located on the frame 1. A conveying device 3 is provided in the milling channel 2. In this embodiment, the conveying device 3 is a steel mesh conveyor belt. Several conveying rollers 17 are arranged between the steel mesh conveyor belts. The steel mesh is supported by the conveying rollers 17, so that the conveying device 3 can be more stable during conveying. In addition, in order to further improve the machining accuracy, in this embodiment, the distance between adjacent conveying rollers 17 is less than the length of the heat sink to be processed. Thus, when processing the heat sink, at least two conveying rollers 17 will support the heat sink under it, so that the heat sink is less likely to shake during processing.

[0027] Within the milling channel 2, along the conveying direction of the conveying device 3, a second milling assembly 5, a first milling assembly 4, a fourth clamping part 18, a cutting assembly 6, and a third clamping part 9 are sequentially arranged. Meanwhile, on the frame 1, a second clamping part 8 is provided for use with the second milling assembly 5, and a first clamping part 7 is provided for use with the first milling assembly 4. The first clamping part 7 is used to press the heat sink onto the conveying device 3 in the vertical horizontal direction, and the second clamping part 8 is used to clamp the heat sink in the front-back direction.

[0028] In this embodiment, the first clamping part 7 includes a first clamping cylinder 711 and a first clamping plate 712. The first clamping cylinder 711 is fixed on the frame 1 directly above the conveying device 3, and the first clamping plate 712 is fixed on the piston rod of the first clamping cylinder 711. In use, the first clamping cylinder 711 can drive the first clamping plate 712 to move towards the conveying device 3 and away from the conveying device 3 to press the heat sink to be processed onto the conveying device 3. Since a conveying roller 17 is provided in this embodiment, the first clamping plate 712 will press the heat sink to be processed onto the conveying device 3 under the support of the conveying roller 17 and the steel mesh conveyor belt. Then, the heat sink can be processed on both sides by the first milling assembly 4.

[0029] Reference Figure 1 , 2To prevent the heat sink from moving during cutting, a fourth clamping part 18 is provided on the frame 1. The structure of the fourth clamping part 18 is the same as that of the first clamping part 7. The fourth clamping part 18 includes a pressure plate 181 and a seventh driving member 182. The pressure plate 181 is slidably arranged in the vertical direction. The seventh driving member 182 is a cylinder. The pressure plate 181 is driven by the seventh driving member 182 to press the left end of the heat sink to be cut. In this way, when cutting the heat sink, the left end is pressed by the pressure plate 181 and the right end is clamped by the third clamping part 9. The heat sink is less likely to shake during the cutting process, and the cutting accuracy is higher.

[0030] The second clamping part 8 includes two second clamping cylinders 811 and two second clamping plates 812. The two second clamping cylinders 811 are distributed on both sides of the milling channel 2. The second clamping plates 812 are fixed on the piston rods of the second clamping cylinders 811. The second clamping cylinders 811 can drive the second clamping plates 812 to clamp the heat sink to be processed on the conveying device 3. Since the second clamping plates are in contact with both sides of the heat sink to be processed, the second milling assembly 5 can conveniently process the upper surface of the heat sink to be processed.

[0031] The first milling assembly 4 includes a first tool holder 411, a first milling cutter 412, and a first drive member 413. The first tool holder 411 is slidably mounted on the frame 1 in the left-right direction. The first drive member 413 is used to drive the first tool holder 411 to slide in the horizontal plane. The first milling cutter 412 is fixed on the first tool holder 411. In specific use, a motor that drives the first milling cutter 412 is also connected to the first tool holder 411. In this embodiment, there are two sets of the first tool holder 411, the first milling cutter 412, and the first drive member 413, located on both sides of the conveying channel, for processing both sides of the heat sink to be processed. In this embodiment, the first drive member 413 is a rodless cylinder.

[0032] Reference Figure 1 , 2 The second milling assembly 5 includes a second tool holder 511, a second milling cutter 512, and a second drive member 513. The second tool holder 511 is slidably mounted on the frame 1 in the left-right direction. The second drive member 513 is used to drive the second tool holder 511 to slide in the horizontal plane. The second milling cutter 512 is fixed on the second tool holder 511. In specific use, a motor that drives the second milling cutter 512 is also connected to the second tool holder 511. In this embodiment, the second tool holder 511 is located on the frame 1 directly above the conveying device 3 and is used to mill the top surface of the heat sink to be processed. The second drive member 513 is a rodless cylinder.

[0033] In practical use, the heat sink to be processed is placed from the upstream end of the milling channel 2. At this time, the heat sink will be driven by the conveying device 3. When the heat sink is conveyed to the position of the second clamping part 8, the conveying device 3 stops working. At this time, the second clamping cylinder 811 will drive the second clamping plate 812 to clamp the heat sink. Then the motor drives the second milling cutter 512 to work. The second drive member 513 drives the second tool holder 511 to drive the second milling cutter 512 to process the upper end face of the heat sink from right to left in the horizontal direction. When position 2 is at the leftmost end, the upper surface of the heat sink is processed. At this time, the second clamping cylinder 811 drives the second clamping plate 812 to release the heat sink. After the conveying device 3 starts, it drives the heat sink to the position of the first clamping assembly and then stops. At this time, the first clamping cylinder 711 drives the first clamping plate 712 to press the heat sink onto the conveying device 3. Then, the first milling cutter 412 on both sides of the heat sink is driven by the motor to work. At the same time, the first tool holder 411 is driven by a driving component to move from right to left, so that the two sides of the heat sink can be processed.

[0034] Reference Figure 1 , 2 During the processing of the upper surface and two sides of the heat sink, by setting the second clamping part 8 at the upstream end of the conveying device 3, the heat sink to be processed can be pushed to the center of the width direction of the conveying device 3. In this way, when the heat sink is pressed by the first clamping part 7, the heat sink can be pressed at the center position of the width direction of the milling channel 2, which facilitates the two first milling components 4 to process the two ends of the heat sink, reduces the time for subsequent position adjustment, and improves processing efficiency.

[0035] The third clamping part 9 includes a clamping block 911 and a fifth driving member 912. In this embodiment, the fifth driving member 912 is a rodless cylinder, and the clamping block 911 and the fifth driving member 912 are two sets located on both sides of the milling channel 2. The two clamping blocks 911 are arranged opposite to each other. When the heat sink passes between the two clamping blocks 911, the fifth driving member 912 drives the clamping blocks 911 to clamp the heat sink. The fifth driving member 912 is slidably arranged on the frame 1 along the conveying direction of the conveying device 3. At the same time, a sixth driving member 16 is arranged on the frame 1 to drive the fifth driving member 912 to slide horizontally. In this embodiment, the sixth driving member 16 is also a rodless cylinder.

[0036] Reference Figure 2 , 3 The cutting assembly 6 includes a third blade holder 611 and a rotary cutting saw blade 612. In this embodiment, in order to facilitate the rotary cutting saw blade 612 to process the heat sink, two conveying devices 3 are provided. The rotary cutting saw blade 612 is located between the two conveying devices 3, and the distance between the two conveying devices 3 is set to be less than the outer diameter of the heat sink, so as to prevent the heat sink from falling after cutting.

[0037] The third blade holder 611 is slidably mounted on the frame 1 in a vertical direction. A third driving member 613 is mounted on the frame 1 to drive the third blade holder 611 to slide. A slide 10 is slidably mounted on the third blade holder 611 from left to right. The rotary cutting saw blade 612 is rotatably connected to the slide 10. A fourth driving member 11 is mounted on the third blade holder 611 to drive the slide 10 to slide. In this embodiment, a motor that drives the rotary cutting saw blade 612 is also mounted on the slide 10. Both the third driving member 613 and the fourth driving member 11 are rodless cylinders. The third blade holder 611 is fixed on the sliding piston of the third driving member 613, the fourth driving member 11 is fixed on the third blade holder 611, and the slide 10 is fixed on the sliding piston of the fourth driving member 11.

[0038] Reference Figure 3 , 4 The rotary cutting saw blade 612 is a circular saw blade with cutting teeth evenly distributed on its outer circumference. When the cutting teeth contact the heat sink, they can cut the heat sink. A first groove 13 is provided on one side of the rotary cutting saw blade 612, and a second groove 14 is provided on the other side of the rotary cutting saw blade 612. Figure 4 As shown by the dashed line in the middle, there are multiple first grooves 13 and second grooves 14, which are evenly distributed on the rotary cutting saw blade 612, and the first grooves 13 and second grooves 14 are arranged alternately.

[0039] Reference Figure 4 , 5 Solder grooves 15 are provided on the inner walls of the first groove 13 and the second groove 14. In this embodiment, the solder grooves 15 are located at the bottom of the first groove 13 or the second groove 14, and the solder grooves 15 are surrounded on the side walls of the first groove 13 or the second groove 14. In use, solder is applied and accumulated in the solder grooves 15 in the bottom and side walls of the first groove 13 and the second groove 14, and excess solder is removed from the first groove 13 and the second groove 14, thereby controlling the total amount of solder in the first groove 13 and the second groove 14.

[0040] In use, milling cutter heads 12 are welded into both the first groove 13 and the second groove 14, while the solder groove 15 is used to store solder. When the milling cutter head 12 is welded, the solder in the solder groove 15 can firmly connect the milling cutter head 12 to the first groove 13 or the second groove 14. By setting the solder groove 15, the amount of solder in the first groove 13 and the second groove 14 can be controlled to ensure that the solder has the same expansion amount when the milling cutter head 12 is welded. This allows the milling cutter head 12 to have high precision after welding and to a certain extent avoids the situation where the height of adjacent milling cutter heads 12 protruding from the first groove 13 or the second groove 14 is inconsistent after welding. During operation, since the first groove 13 and the second groove 14 are arranged alternately, the milling cutter head 12 can evenly dissipate heat to the cutting saw blade during cutting, improving heat dissipation efficiency.

[0041] Reference Figure 4 , 5 In order to ensure the cutting and end milling of the heat sink, the radius of the rotary cutting saw blade 612 needs to be greater than twice the diameter of the outer circle of the heat sink to be processed. At the same time, in order to ensure that the heat sink to be processed is cut open and then processed by the milling cutter head 12, the distance between the milling cutter head 12 and the outer circumference of the rotary cutting saw blade 612 needs to be greater than the diameter of the outer circle of the heat sink to be processed. In order to ensure that the milling cutter head 12 processes the entire end face of the heat sink, the distance between the milling cutter head 12 and the rotation axis of the rotary cutting saw blade 612 needs to be greater than the diameter of the outer circle of the heat sink to be processed.

[0042] After the upper and side surfaces of the heat sink to be processed are completed, the heat sink will be conveyed to the cutting assembly 6. At this time, the conveying device 3 stops moving, and the fifth driving member 912 drives the clamping block 911 to clamp the two sides of the heat sink. Then, the third driving member 613 drives the third tool holder 611 to move towards the heat sink side. At this time, the heat sink will gradually come into contact with the rotary cutting saw blade 612 until it is cut by the rotary cutting saw blade 612.

[0043] Then, the third drive unit 613 is stopped, and the fifth drive unit 912 is driven by the sixth drive unit 16 to slide a distance away from the rotary cutting saw blade 612. Then, the third tool holder 611 is driven by the fourth drive unit 11 to slide a certain distance downstream of the conveyor belt. During this process, the sliding distance of the third tool holder 611 is half the sliding distance of the fifth drive unit 912. At this time, the rotary cutting saw blade 612 will be located in the middle of the two heat sinks that are cut. By controlling the sliding distance of the fifth drive unit 912, the thickness of the heat sink end face that is milled can be controlled.

[0044] Finally, the third tool holder 611 continues to move upward via the third drive member 613. At this time, the end faces of the two heat sinks that have been cut will be gradually processed by the milling head 12 until all the end faces of the heat sinks are processed. During the process of cutting the heat sink, by moving the cut heat sink to the right by a certain distance and at the same time moving the rotary cutting saw blade 612 to the right by a certain distance, a space for the milling head 12 to pass through can be formed between the two cut heat sinks. At this time, the milling head 12 is used to mill the two cutting surfaces.

[0045] In this embodiment, multiple sensing components are provided on the frame 1. The sensing components can be proximity switches or optical sensors, etc., to detect the position of the heat sink in order to control the corresponding operation of other supporting components.

[0046] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A machining fixture for milling heat sinks, comprising a frame (1), characterized in that: The frame (1) is provided with a milling channel (4), and a conveying device (3) is provided in the milling channel (4). The conveying device (3) is used to transport the part to be processed from one end of the milling channel (4) to the other end. The milling channel (4) is provided with a first milling assembly (4) for milling both sides of the heat sink and a second milling assembly (5) for milling the upper surface of the heat sink. The frame (1) is provided with a cutting assembly (6) for cutting the milled heat sink into shape. The frame (1) is provided with a first clamping part (7) and a second clamping part (8). The first clamping part (7) is used to clamp the heat sink along the vertical direction of the upper and lower sides of the heat sink, and the second clamping part (8) is used to clamp the heat sink along the vertical direction of the heat sink. The heat sink is clamped on both sides of the plate; along the direction of the milling channel (4), the first clamping part (7) is located downstream of the second clamping part (8), the first milling assembly (4) is located downstream of the second milling assembly (5), the first milling assembly (4) is used to process the heat sink clamped by the first clamping part (7), and the second milling assembly (5) is used to process the heat sink clamped by the second clamping part (8); a third clamping part (9) is provided on the frame (1), the third clamping part (9) is located downstream of the first clamping part (7), the cutting assembly (6) is located between the first clamping part (7) and the third clamping part (9), and the third clamping part (9) is used to clamp the heat sink away from the first clamping part (8) when the cutting assembly (6) cuts. A clamping part (7) at one end; the cutting assembly (6) includes a third blade holder (611) and a rotary cutting saw blade (612) located on the third blade holder (611) for cutting heat sinks. The third blade holder (611) is slidably mounted on the frame (1) in a direction toward or away from the conveying device (3). A third driving member (613) for driving the third blade holder (611) to slide is provided on the frame (1). A slide (10) is provided on the third blade holder (611) along the heat sink conveying direction. A fourth driving member (11) for driving the slide (10) to slide is provided on the third blade holder (611). The rotary cutting saw blade (612) is located on the slide (10). The third clamping part (7) at one end; the cutting assembly (6) includes a third blade holder (611) and a rotary cutting saw blade (612) located on the slide (10). The clamping part (9) includes clamping blocks (911) located on both sides of the heat sink and a fifth driving member (912) for clamping the heat sink by driving the clamping blocks (911). The fifth driving member (912) is slidably disposed on the frame (1) along the heat sink conveying direction. A sixth driving member (16) for driving the fifth driving member (912) to slide is disposed on the frame (1). Milling cutter heads (12) are disposed on both sides of the rotary cutting saw blade (612). Multiple milling cutter heads (12) are evenly distributed along the circumference of the rotary cutting saw blade (612). Along the radial direction of the rotary cutting saw blade (612), the distance between the milling cutter head (12) and the outer circumference of the rotary cutting saw blade (612) is greater than the outer diameter of the heat sink to be processed.The radius of the cutting saw blade is greater than twice the outer diameter of the heat sink to be processed, and the distance between the milling cutter head (12) and the rotation axis of the rotary cutting saw blade (612) is greater than the diameter of the outer diameter of the heat sink to be processed.

2. The machining fixture for milling heat sinks according to claim 1, characterized in that: The first milling assembly (4) includes a first tool holder (411) slidably disposed on the frame (1) along the conveying direction of the conveying device (3) and a first milling cutter (412) disposed on the first tool holder (411) for milling the side of the heat sink. The frame (1) is provided with a first driving member (413) for driving the first tool holder (411) to slide.

3. The machining fixture for milling heat sinks according to claim 1, characterized in that: The second milling assembly (5) includes a second tool holder (511) slidably disposed on the frame (1) along the conveying direction of the conveying device (3) and a second milling cutter (512) disposed on the second tool holder (511) for milling the upper and lower surfaces of the heat sink. The frame (1) is provided with a second driving member (513) for driving the second tool holder (511) to slide.

4. The machining fixture for milling heat sinks according to claim 1, characterized in that: The rotary cutting saw blade (612) has a plurality of first grooves (13) on one side and a plurality of second grooves (14) on the other side. The milling cutter head (12) is welded into the first grooves (13) and the second grooves (14).

5. A machining fixture for milling heat sinks according to claim 4, characterized in that: The first groove (13) and the second groove (14) are arranged alternately on the rotary cutting saw blade (612). The inner walls of the first groove (13) and the second groove (14) are provided with solder grooves (15). The solder grooves (15) are located between the first groove (13) and the milling cutter head (12) and between the second groove (14) and the milling cutter head (12).

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