TWI817448B - Riveting method of heat dissipation base and heat pipe - Google Patents

Abstract

The invention discloses a riveting method for a heat dissipation base and a heat pipe. The steps include: Step 1. Prepare a workpiece; prepare a heat dissipation base and a heat pipe. The upper side of the heat dissipation base has a concave cavity and convex grooves located on both sides of the upper end opening of the concave cavity. The heat pipe is pre-placed in the cavity; step 2, pre-press; use the pre-pressure module to press down so that the two bosses on the upper side of the heat dissipation base are slightly curved toward the heat pipe; step 3, roll flat; use the roller The module is progressively pressed down toward the upper side of the heat dissipation base. During the process of holding down, the workpiece moves horizontally back and forth with the moving platform. In this way, through the two steps of pre-pressing and rolling, the two bosses can rivet the heat pipe and form a rolling plane, and increase the thermal contact area to improve the heat dissipation performance.

Description

Riveting method of heat dissipation base and heat pipe

The present invention relates to the field of processing and manufacturing of heat dissipation devices, and in particular, to a riveting method for a heat dissipation base and a heat pipe.

Patent Notice No. CN106288895B discloses a radiator inlaid with heat pipes and a manufacturing method thereof. The radiator includes: a heat dissipation base body with an accommodation groove and riveting grooves located on both sides of the accommodation groove. The riveting groove and the There are riveted convex teeth formed between the accommodating grooves; and a heat pipe placed in the accommodating groove; wherein, the heat pipe is extruded and deformed to closely fit the inner wall surface of the accommodating groove, and the riveted convex teeth are extruded and deformed. Fitted to the outer surface of the heat pipe. The manufacturing method includes the following steps: (1) providing a heat dissipation base body, and setting an accommodating groove on the surface of the heat dissipating base body; (2) setting riveting grooves on both sides of the accommodating groove, and connecting the riveting groove and the accommodating groove. There are riveted convex teeth formed between them; (3) Provide a heat pipe and place the heat pipe in the accommodation groove; (4) Squeeze the heat pipe and the riveting convex teeth so that the heat pipe is extruded and deformed to fit in the accommodation groove. The inner wall surface of the heat pipe is tightly fitted, and the riveting protruding teeth are extruded and deformed to fit the outer surface of the heat pipe; when the heat pipe and the riveting protruding teeth are squeezed, a riveting tool is provided, and the riveting tool is used to squeeze the heat pipe and the riveting Protruding teeth; the bottom of the riveting tool is formed with a protruding strip corresponding to the riveting groove, and the two sides of the protruding strip are inclined surfaces; when the heat pipe and the riveting protruding teeth are squeezed, the top surface of the heat pipe and the riveting protruding tooth are riveted The top surfaces of the convex teeth are extruded to form connected reinforcing grooves.

Although the above-mentioned radiator manufacturing method with inlaid heat pipes can rivet and fix the heat pipes in the receiving grooves, its structure is relatively complex and requires special riveting grooves, which increases the difficulty of production. Moreover, due to the existence of the riveting grooves, the heat dissipation after riveting will be poor. top of substrate and heat The top of the tube cannot form a completely flat surface, which reduces the thermal contact area and affects heat dissipation.

In addition, although the commonly known heat sinks with heat pipes embedded in them and other public documents claim that the heat pipes are as flush as possible with the top surface of the heat dissipation base through mechanical riveting or multiple mechanical riveting, in fact, during mechanical riveting, The riveting method of pressing down the entire surface of the mold is generally used. Since the inside of the heat pipe is hollow, the stress-bearing area at the position of the riveted protruding teeth will cause large stress when the heat pipe is pressed, which can easily cause large local deformation of the heat pipe and produce The problem of concavity affects the processing yield. Therefore, a new technical solution needs to be studied to solve the above problems.

The main purpose of the present invention is to provide a riveting method for a heat dissipation base and a heat pipe. The riveting method is simple and feasible. Through the two steps of pre-pressing and rolling, the riveting deformation of the heat dissipation base is achieved, and the heat pipe is riveted and fixed. At the same time, the heat pipe is The top of the heat dissipation base forms a complete flush plane with the top of the heat dissipation base, which increases the thermal contact area and improves the heat dissipation performance. It also effectively solves the problem of large stress, deformation, and concavity of the heat pipe caused by the use of full-surface press-down riveting in traditional technology. problem.

In order to achieve the above purpose, the present invention is a riveting method for a heat dissipation base and a heat pipe, which adopts the following technical steps: Step 1. Prepare a workpiece; the workpiece includes a heat dissipation base and a heat pipe; the upper side of the heat dissipation base has a concave The cavity is a groove that is concave from an upper side of the heat dissipation base toward the lower side. The cavity has an upper end opening, and the upper end opening is connected to the upper side. The upper side of the heat dissipation base has two holes located on the upper side. The bosses on both sides of the upper opening protrude from the upper side of the heat dissipation base; the heat pipe is pre-processed into a flat tube with a thickness smaller than its width, and the heat pipe is placed downwardly in the cavity from the upper opening After that, put the heat dissipation base Place the heat pipe together with the heat pipe on the jig of a moving platform; step 2, pre-press; the heat dissipation base and the heat pipe move with the moving platform to the bottom of a pre-pressing module, using a part of the pre-pressing module The pre-pressure driving device drives a pre-pressure upper mold to press down the boss toward the top of the heat dissipation base, so that the bosses on both sides are bent and deformed toward the center of the heat pipe into a slightly curved shape after being riveted; Step 3. Roll flat; the pre-pressed boss moves with the mobile platform to the bottom of a roller module, and the rotatable roller of the roller module is used to gradually press down toward the upper side of the heat dissipation base; the rolling surface of the roller When in pressing contact with the upper side of the heat dissipation base, the mobile platform simultaneously drives the heat dissipation base and the heat pipe to move horizontally back and forth several times in a direction tangent to the rolling surface of the roller until the boss is in contact with the top surface of the heat pipe. And the upper side surface of the heat dissipation base is rolled to be flush, and the flattened boss is rolled into the cavity and pressed against both sides of the heat pipe to rivet the heat pipe.

As a preferred solution, in the above-mentioned riveting method of the heat dissipation base and the heat pipe, a workpiece pick-and-place position, a rolling station and a pre-pressing station are provided along the front and rear directions of movement of the mobile platform; in step 1, the When the mobile platform moves to the workpiece pick-and-place position, the heat dissipation base and the heat pipe are placed on the jig at the workpiece pick-and-place position; then, the jig is automatically sent to the pre-pressing workpiece by the mobile platform. position, when the jig reaches the pre-pressing station, the pre-pressing module located above the pre-pressing station presses down toward the upper side of the heat dissipation base; thereafter, the jig is automatically sent to the mobile platform by the mobile platform. When the jig reaches the rolling station, the roller module located above the rolling station presses down toward the upper side of the heat dissipation base until the rolling surface of the roller is in contact with the heat dissipation base. The upper side maintains riveting contact; during the process of gradually pressing down to maintain riveting contact, the jig reciprocates forward and backward along with the mobile platform. The roller moves forward and backward until the boss is flush with the top surface of the heat pipe and the upper surface of the heat dissipation base.

As a preferred solution, in the above riveting method of the heat dissipation base and the heat pipe, the mobile platform is connected to a translation driving device, which includes a first motor, a first screw rod and a plurality of first slide rail seats. A slide rail seat has an internal threaded hole, the first screw rod passes through the internal threaded hole, the first motor drives the first screw rod to rotate, the first screw rod extends forward and backward, and the first slide rail seat extends along the first screw rod Translating forward and backward, the mobile platform is connected to the first slide rail seat; and the pre-pressing station, rolling station and workpiece pick-and-place position are arranged in sequence away from the first motor along the extension direction of the first screw.

As a preferred solution, in the above riveting method of the heat dissipation base and the heat pipe, in step 3, the rotatable roller of the roller module is used to progressively press down N times toward the upper side of the heat dissipation base, and N is greater than or A positive number equal to 3, where: for the first time, the roller module is controlled to press down until the rolling surface of the roller is in pressing contact with the upper side of the heat dissipation base, and the mobile platform drives the heat dissipation base in the direction tangent to the rolling surface of the roller. Move horizontally once or reciprocate several times; for the second time, the roller module is controlled to continue to descend to a first set height, so that the rolling surface of the roller is in pressing contact with the upper side of the heat dissipation base, and the mobile platform drives the heat dissipation base along the The rolling surface of the roller returns horizontally once or reciprocates several times in the tangent direction; until the Nth time, the roller module is controlled to continue to descend to the N-1 set height, so that the rolling surface of the roller is in pressing contact with the upper side of the heat dissipation base. , the mobile platform drives the heat dissipation base to move horizontally once or several times in a direction tangent to the rolling surface of the roller; the first set height and the N-1th set height have the same or different values.

As a preferred solution, in the above riveting method of the heat dissipation base and the heat pipe, a plurality of the rollers are arranged side by side along the direction of reciprocating horizontal movement of the heat dissipation base.

As a preferred solution, the riveting method of the above-mentioned heat dissipation base and heat pipe , the pre-pressure driving device drives the pre-pressure upper mold to move up and down, and the pre-pressure drive device drives the pre-pressure upper mold to press down the boss toward the upper side of the heat dissipation base.

As a preferred solution, in the above riveting method of the heat dissipation base and the heat pipe, the roller module includes a rolling seat and a rolling driving device that drives the rolling seat to move up and down. The roller is installed on the rolling seat. The bottom of the rolling base; the rolling driving device drives the roller at the bottom of the rolling base to gradually press down toward the upper side of the heat dissipation base.

As a preferred solution, in the above riveting method of the heat dissipation base and the heat pipe, the rolling driving device has a second motor, the second motor drives a second screw to rotate, and the rolling seat passes through a second slide rail The internal thread hole of the seat is threadedly connected to the second screw; when the second motor is working, it drives the second screw to rotate, causing the second slide rail seat to move up and down along the second screw, thereby causing the rolling seat and the second screw to rotate. The rollers move up and down together; and the operation of the second motor is controlled through the program to realize the progressive pressing of the rollers toward the upper side of the heat dissipation base.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that the riveting method is simple and feasible, and it adopts two steps of pre-pressing and rolling. Especially in the rolling step, the rotatable roller of the roller module is used to progressively press down on the upper side of the heat dissipation base. At the same time, the mobile platform drives the workpiece to move horizontally back and forth several times in the direction tangent to the rolling surface of the roller until The boss, the top surface of the heat pipe, and the upper side of the heat dissipation base are rolled flush. Moreover, the flattened boss rivets and fixes the heat pipe. In this way, the top of the heat pipe and the top of the heat dissipation base form a relatively complete flush plane, which increases the thermal contact area and improves the heat dissipation performance. Moreover, rolling is a point/line local micro-area contact, which reduces the riveting stress. It reciprocates back and forth and gradually deforms. The force is small and the deformation is uniform. It effectively solves the problem that is easily caused by the use of the entire surface downward pressure riveting in traditional technology. The heat pipe has high stress, large deformation, and concave problems.

1: Cooling base

2:Heat pipe

11: Top opening

111: Upper side

12: cavity

13:Boss

100:Pre-pressed module

101: Pre-pressed upper mold

102: Pre-pressure drive device

200:Roller module

201:Roller

202:Rolling surface

203:Rolling seat

204:Rolling drive device

205:Second screw

206:Second slide rail seat

207:Second motor fixing plate

208:Motor fixed guide post

209:First guide sleeve

210:Roller guide column

211:Second guide bushing

212:Screw seat

300: base plate

301: Workpiece pick-and-place position

302: Pre-pressing station

303:Rolling station

304:Jig

305: Translation drive device

306:First motor

307:First screw

308: First slide rail seat

309:Mobile platform

310: Left slider

311: Right slider

312: Left slide rail

313:Right slide rail

314: Buffer block

315:First motor fixing plate

316:Fixed column

317: Upper fixed top plate

318:PLC electric control box

319: Electric control box bracket

[Fig. 1] is a first three-dimensional assembly diagram of the riveting equipment according to the embodiment of the present invention (the jig is located in the workpiece pick-and-place position).

[Fig. 2] is a first side view of the riveting equipment according to the embodiment of the present invention.

[Fig. 3] is a second three-dimensional assembly diagram of the riveting equipment according to the embodiment of the present invention (the jig is located at the pre-pressing station).

[Fig. 4] is a third three-dimensional assembly diagram of the riveting equipment according to the embodiment of the present invention (the jig is located at the rolling station).

[Fig. 5] A diagram illustrating the manufacturing steps of the workpiece according to the embodiment of the present invention.

The structural features and other functions and purposes of the present invention are described in detail below with reference to the embodiments of the drawings: Please refer to Figures 1 to 5, which show an embodiment of a riveting method for a heat dissipation base and a heat pipe of the present invention. specific structure and methods. The specific embodiment of the riveting method for the heat dissipation base and the heat pipe of the present invention includes the following steps:

Step 1. Prepare the workpiece; as shown in Figure 5, the workpiece includes a heat dissipation base 1 and a heat pipe 2; the heat dissipation base 1 has a cavity 12, and the cavity 12 is formed from an upper side 111 of the heat dissipation base 1 The cavity 12 has an upper opening 11 connected to the upper side 111 , and the upper side 111 of the heat dissipation base 1 has two holes on both sides of the upper opening 11 . The boss 13 protrudes from the upper side 111 of the heat dissipation base 1 . Usually, the heat dissipation base 1 is formed from an aluminum plate. For example, when making the heat dissipation base, an arched portion is first punched downward on the thin aluminum plate, and the arched portion protrudes from the thin aluminum plate. Below the shaped aluminum plate, the interior of the arched portion forms the cavity 12. The internal shape and size of the cavity 12 are consistent with the bottom and outer surfaces of both sides of the heat pipe 2. The heat pipe 2 is pre-processed to a thickness of For a flat tube smaller than its width, the depth of the cavity 12 needs to be greater than the thickness of the heat pipe 2 . Then, the bottom of the arched portion is shaped upward to form two bosses 13 located on both sides of the upper end opening 11. The bosses 13 protrude upward from both sides of the upper side of the thin aluminum plate. The thickness of the bosses 13 is less than that of the thin aluminum plate. The thickness of the shaped aluminum plate, and the depth of the upwardly shaped cavity 12 is equal to the thickness of the heat pipe 2. Thereby, the heat pipe 2 is placed downwardly in the cavity 12, and then the heat dissipation base 1 and the heat pipe 2 are placed together on the jig 304 of a moving platform 309 (as shown in FIG. 1).

Step 2, pre-pressing; the above-mentioned heat dissipation base 1 and heat pipe 2 move with the mobile platform 309 to the bottom of a pre-pressure module 100 (as shown in Figure 3), and use the pre-pressure module 100 to move towards the heat dissipation base 1 The upper side of the heat pipe 2 presses down the boss 13, so that the bosses 13 on both sides of the upper opening 11 are bent and deformed toward the center of the heat pipe 2 into a slightly curved shape (as shown in part A in Figure 5). It means that the boss 13 is folded inwards.

Step 3. Roll flat; the above-mentioned heat dissipation base 1 and heat pipe 2 are moved together with the mobile platform 309 to the bottom of a roller module 200 (as shown in Figure 4), using the rotatable rollers of the roller module 200 201 is gradually pressed down toward the top of the heat dissipation base 1; the rolling surface 202 of the roller 201 of the roller module 200 is in pressing contact with the upper side of the heat dissipation base 1, and the roller module 200 is pressed down to maintain contact. , the mobile platform 309 drives the heat dissipation base 1 and the heat pipe 2 to move horizontally back and forth several times in a direction tangent to the rolling surface 202 of the roller 201, until the boss 13, the top surface of the heat pipe 2 and the top of the heat dissipation base 1 The surface is rolled until it is flush, and the flattened boss 13 is rolled into the cavity 12 and pressed against the heat pipe 2 The heat pipe 2 is riveted and fixed on both sides.

More specific implementation steps, in the above step 3, use the rotatable roller 201 of the roller module 200 to progressively press down N times toward the upper side 111 of the heat dissipation base 1, N is a positive number greater than or equal to 3, where: The roller module 200 is controlled for the first time to press down until the rolling surface 202 of the roller 201 is in pressing contact with the upper side of the heat dissipation base 1, and the mobile platform 309 drives the heat dissipation base 1 and the heat pipe 2 to contact each other along the rolling surface 202 of the roller 201. Move horizontally once or reciprocate several times in the cutting direction; for the second time, the roller module 200 is controlled to continue to descend to the first set height, so that the rolling surface 202 of the roller 201 is in pressing contact with the upper side of the heat dissipation base 1, and the mobile platform 309 Drive the heat dissipation base 1 and the heat pipe 2 to move horizontally back and forth once or several times in the direction tangent to the rolling surface 202 of the roller 201; continue until the Nth control roller module 200 continues to descend to the N-1 set height, so that The rolling surface 202 of the roller 201 is in pressing contact with the upper side of the heat dissipation base 1. The moving platform 309 drives the heat dissipation base 1 and the heat pipe 2 to move horizontally once or reciprocally several times in a direction tangent to the rolling surface 202 of the roller 201; The values of the first set height and the N-1 set height are the same or different, for example, the height value is about 0.3~0.6 mm.

Referring to Figure 2, in order to implement the above-mentioned riveting method of the heat dissipation base and the heat pipe, the present invention implements a base plate 300 on the riveting equipment. The base plate 300 is provided with a workpiece pick-and-place position 301 and a pre-pressing tool along the front and rear directions. station 302 and a rolling station 303. Specifically, the workpiece pick-and-place position 301, the rolling station 303, and the pre-pressing station 302 are arranged in sequence from front to back, that is, the pre-pressing station 302, the rolling station 303, and the workpiece pick-and-place position 301 are arranged along a first The extending direction of a screw 307 is arranged away from a first motor 306. This is equivalent to the rolling station 303 being between the workpiece pick-and-place position 301 and the pre-pressing station 302, which can meet the rolling flattening process. space moves forward and backward.

Referring again to FIG. 2 , in step 1 above, the workpiece (heat dissipation base 1 and heat pipe 2 ) is placed on the jig 304 of the workpiece picking and placing position 301 . Subsequently, the jig 304 is automatically sent to the pre-pressing station 302 by the mobile platform 309. When the jig 304 reaches the pre-pressing station 302, the pre-pressing module 100 located above the pre-pressing station 302 faces the heat dissipation base 1 Press down on the upper side (as shown in Figure 3). Subsequently, the jig 304 is automatically sent to the rolling station 303 by the mobile platform 309. When the jig 304 reaches the rolling station 303, the roller module 200 located above the rolling station 303 faces the upper side of the heat dissipation base 1 Press down (as shown in Figure 4) until the rolling surface 202 of the roller 201 of the roller module 200 maintains riveted contact with the upper side of the heat dissipation base 1 (as shown in Figure 5). During the process of gradually pressing down to maintain riveting contact, the jig 304 drives the moving platform 309 to move back and forth horizontally, and the workpiece (heat dissipation base 1 and heat pipe 2) drives the roller 201 to continue rolling back and forth, so that the roller 201 is opposite to the top of the workpiece. Rolling is performed until the boss 13 , the top surface of the heat pipe 2 and the top surface of the heat dissipation base 1 are rolled flush. After the rolling and leveling process is completed, the jig 304 is automatically sent to the workpiece pick-and-place position 301 by the translation driving device 305. The riveted workpiece can be taken out, and then the workpiece to be processed can be reinstalled to enter the next round of riveting process.

In this embodiment, the mobile platform 309 is connected to a translation driving device 305. The translation driving device 305 includes a first motor 306, a first screw 307 and a first slide rail base 308; the first slide rail base 308 has An internal threaded hole (not shown) allows the first screw 307 to pass through the internal threaded hole of the first slide rail base 308; the first motor 306 is installed on the base plate 300, and a first motor fixing plate is provided on the base plate 300. 315, the output end of the first motor 306 passes through the through hole of the first motor fixing plate 315. Thereby, the first motor 306 can drive the first screw 307 to rotate. The first screw 307 extends forward and backward, so that the first slide rail base 308 can translate forward and backward along the first screw 307. The fixture 304 is connected to the first slide. Rail base 308. Excellent Optionally, the fixture 304 is disposed on the moving platform 309 , and the moving platform 309 is connected to the first slide rail base 308 . The mobile platform 309 is also connected to a left slide block 310 and a right slide block 311 (as shown in FIG. 1 ). The left slide block 310 and the right slide block 311 are respectively located on the left and right sides of the first slide rail seat 308 . The slide block 310 and the right slide block 311 are respectively adapted to a left slide rail 312 and a right slide rail 313. The left slide rail 312 and the right slide rail 313 are both extended on the bottom plate 300 along the front and rear directions. In addition, buffer blocks 314 are provided at the front and rear ends of the left slide rail 312 and the right slide rail 313 to buffer and limit the travel of the left slide block 310 and the right slide block 311 in the front and rear directions to avoid hard collisions. .

Referring again to Figure 1, the above-mentioned pre-pressing module 100 includes a pre-pressing upper mold 101 and a pre-pressing driving device 102. The pre-pressing driving device 102 drives the pre-pressing upper mold 101 to move up and down. The pre-pressing driving device 101 can move up and down. 102 can use motors, cylinders, etc., and there are no restrictions here.

Referring again to Figure 1, the above-mentioned roller module 200 includes a rolling seat 203, a plurality of rollers 201 installed at the bottom of the rolling seat 203, and a rolling driving device 204 that drives the rolling seat 203 to move up and down; The rolling driving device 204 can also use a motor, a cylinder, etc. Here, the rolling driving device 204 preferably uses a second motor. The second motor drives a second screw 205 to rotate, and the rolling seat 203 passes through a first The internal threaded holes of the second slide rail base 206 are threadedly connected to the second screw rod 205, so that when the second motor is working, the second screw rod 205 can be driven to rotate, so that the second slide rail base 206 moves up and down along the second screw rod 205. Then, the rolling seat 203 and the plurality of rollers 201 are moved up and down together. During rolling, the operation of the second motor of the rolling driving device 204 is controlled by a program, so that the roller 201 is gradually pressed down toward the upper side of the heat dissipation base 1 . The values of the first set height and the N-1 set height in the aforementioned step 3 can be flexibly set through the program, which is smart and convenient, and can meet the changing needs of processing parameters of different workpieces. Preferably, the axial direction of the roller 201 (such as the left and right direction) and the direction of the workpiece's reciprocating horizontal movement (such as the front and back direction) are perpendicular to each other, and the roller 201 There are several 201 arranged side by side along the direction of the reciprocating horizontal movement of the workpiece.

Usually, the cavity 12 of the heat dissipation base 1 extends along the front-to-back direction, and the boss 13 is located on the left and right sides of the upper opening 11 of the cavity 12 . During rolling, the rolling surface 202 of the roller 201 forms a point/line with a small local area of contact with the workpiece; theoretically speaking, it is the line at the bottom of the rolling surface 202 of the roller 201 that is parallel to the axial direction of the roller and the workpiece. Line contact is formed, so the riveting pressure is small, the reciprocating back and forth gradually deforms, the force is small and the deformation is uniform, which effectively solves the problem of large stress, large deformation and large deformation of the heat pipe caused by the use of the entire surface pressing riveting in traditional technology. Causes concave problems. Moreover, the line at the bottom of the rolling surface 202 of the roller 201 that is parallel to the axial direction of the roller generally contacts the boss 13 of the workpiece, the top surface of the heat pipe 2 and the upper side of the heat dissipation base 1, which is equivalent to the heat pipe. 2 will only form a pressure-bearing part in the radial direction of the tube; at the same time, the boss 13, the top surface of the heat pipe 2 and the upper side of the heat dissipation base 1 reciprocally roll back and forth on the same line, gradually deforming, so that the boss 13 , the top surface of the heat pipe 2 and the upper side of the heat dissipation base 1 are rolled to be very flush and flat.

Referring again to Figures 1 and 2, in this embodiment, the pre-pressure module 100 and the roller module 200 are both installed on a stand. The stand includes a number of vertically extending fixed columns 316, and The upper fixed top plate 317 is connected to the tops of several fixed columns 316, and the lower ends of the fixed columns 316 are connected to the bottom plate 300. The pre-pressure driving device 102 and the rolling driving device 204 are respectively connected to a PLC electric control box 318. The PLC electric control box 318 is installed on the electric control box bracket 319. The electric control box bracket 319 is connected to the upper fixed top plate 317. , and extend out of the upper fixed top plate 317, so that the area of the upper fixed top plate 317 is convenient for the arrangement of the pre-pressure module 100 and the roller module 200.

In this embodiment, the second motor of the rolling drive device 204 is vertically installed on a second motor fixing plate 207, and a plurality of motor fixing guide posts are installed on the base plate 300. 208 (for example, four), the second motor fixing plate 207 is installed on the top of several motor fixing guide posts 208. The lower end of the second screw 205 is installed on the screw seat 212 on the upper fixed top plate 317 . Considering the stability of the up and down movement of the second slide rail base 206, a plurality of first guide positioning holes are provided on the second slide rail base 206, so that each of the plurality of motor fixing guide posts 208 passes through a first guide positioning hole. The first guide sleeve 209 can be further installed in the first guide positioning hole, so that the motor fixing guide post 208 passes through the inside of the first guide sleeve 209, and the guidance is smoother. Preferably, the internal threaded hole (not shown) of the second slide rail base 206 is located at the center (or approximately the center) of the second slide rail base 206, and a plurality of first guide positioning holes (not shown) surround The internal threaded holes are arranged so that the central position of the second slide rail seat 206 is spirally linked, and at the same time, the surroundings of the second slide rail seat 206 are guided and positioned. A number of downwardly extending roller guide posts 210 (for example, four) are connected around the second slide rail seat 206. The roller guide posts 210 pass downward through the second guide positioning holes on the upper fixed top plate 317, and the The lower end of the roller guide post 210 is connected to the rolling seat 203. The four roller guide posts 210 are respectively located outside the four motor fixed guide posts 208. Similarly, a second guide bush can be further installed in the second guide positioning hole. 211, so that the roller guide post 210 passes through the inside of the second guide sleeve 211, and the guidance is smoother.

The focus of the design of the present invention is that the riveting method is simple and feasible. It adopts two steps of pre-pressing and rolling. Especially in the rolling step, the rotatable roller of the roller module is used to progressively lower toward the top of the heat dissipation base. At the same time, the mobile platform drives the workpiece to move horizontally back and forth several times in the direction tangent to the rolling surface of the roller, until the boss, the top surface of the heat pipe and the top surface of the heat dissipation base are rolled flush, and the flattened convex The heat pipe is riveted and fixed on the table. In this way, the top of the heat pipe and the top of the heat dissipation base form a relatively complete flush plane, which increases the thermal contact area and improves the heat dissipation performance. Moreover, the rolling is a point/line local small area contact, reducing the Small riveting stress, reciprocating back and forth, gradually deforming, with small force and uniform deformation, effectively solving the problem that is easily caused by the use of full-surface downward pressure riveting in traditional technology The heat pipe has high stress, large deformation, and concave problems.

The above are only preferred embodiments of the present invention and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still belong to the present invention. within the scope of technical solutions.

To sum up, the riveting method of the heat dissipation base and the heat pipe of the present invention is indeed practical and creative. The use of its technical means is undoubtedly novel, and the efficacy and design purposes are indeed consistent. It can be said that it has made reasonable progress. bright. For this reason, I filed an invention patent application in accordance with the law, but I sincerely ask the Jun Bureau to review it carefully and grant a patent.

1: Cooling base

2:Heat pipe

11: Top opening

111: Upper side

12: cavity

13:Boss

101: Pre-pressed upper mold

201:Roller

202:Rolling surface

Claims (8)

A riveting method for a heat dissipation base and a heat pipe, which includes the following steps: Step 1. Prepare a workpiece; the workpiece includes a heat dissipation base and a heat pipe; the upper side of the heat dissipation base has a cavity, and the cavity is formed from the heat pipe. An upper side of the heat dissipation base faces a concave groove on the lower side. The cavity has an upper end opening. The upper end opening is connected to the upper side. The upper side of the heat dissipation base has two bosses located on both sides of the upper end opening. The boss protrudes from the upper side of the heat dissipation base; the heat pipe is pre-processed into a flat tube with a thickness smaller than its width. After the heat pipe is placed downwardly in the cavity from the upper end opening, the heat dissipation base and The heat pipe is placed together on the fixture of a moving platform; step 2, pre-pressing; the heat dissipation base and the heat pipe move with the moving platform to the bottom of a pre-pressing module, using a pre-pressing module of the pre-pressing module. The pressing driving device drives a pre-pressed upper mold to press down the boss toward the top of the heat dissipation base, so that the bosses on both sides are bent and deformed toward the center of the heat pipe into a slightly curved shape after being riveted; Step 3. Rolling flat; the pre-pressed boss moves with the mobile platform to the bottom of a roller module, and the rotatable roller of the roller module is used to progressively press down toward the upper side of the heat dissipation base; the rolling surface of the roller is in contact with When the upper side of the heat dissipation base is in pressing contact, the mobile platform drives the heat dissipation base and the heat pipe to reciprocate horizontally in a direction tangent to the rolling surface of the roller. Several times until the boss is rolled flush with the top surface of the heat pipe and the upper side surface of the heat dissipation base, and the flattened boss is rolled into the cavity and pressed against the cavity. The heat pipe is riveted on both sides of the heat pipe. The riveting method of the heat dissipation base and the heat pipe as described in claim 1, wherein a workpiece pick-and-place position, a rolling station and a pre-pressing station are provided along the front and rear directions of movement of the mobile platform; in step 1, When the mobile platform moves to the workpiece pick-and-place position, the heat dissipation base and the heat pipe are placed on the jig at the workpiece pick-and-place position; then, the jig is automatically sent to the pre-pressure by the mobile platform. station, when the jig reaches the pre-pressing station, the pre-pressing module located above the pre-pressing station presses down toward the upper side of the heat dissipation base; thereafter, the jig is automatically sent to the mobile platform When the jig reaches the rolling station, the roller module located above the rolling station presses down toward the upper side of the heat dissipation base until the rolling surface of the roller is in contact with the heat dissipation base. The upper side of the heat dissipation base maintains riveting contact; during the process of gradually pressing down to maintain riveting contact, the jig moves forward and backward horizontally along with the mobile platform, causing the roller to form reciprocating rolling pressure on the upper side of the heat dissipation base until the convex The platform is rolled flush with the top surface of the heat pipe and the upper side surface of the heat dissipation base. The riveting method of the heat dissipation base and the heat pipe as described in claim 2, wherein the mobile platform is connected to a translation drive device, the translation drive device includes a first motor, a first screw rod and a plurality of first slide rail seats, the The first slide rail base has an internal threaded hole, the first screw rod passes through the internal threaded hole, the first motor drives the first screw rod to rotate, and the first screw rod extends forward and backward. , the first slide rail seat translates forward and backward along the first screw, and the mobile platform is connected to the first slide rail seat; and, the pre-pressing station, rolling station and workpiece pick-and-place position move along the first screw The extension direction is arranged away from the first motor in sequence. The riveting method of the heat dissipation base and the heat pipe as described in claim 1, wherein in step 3, the rotatable roller of the roller module is used to progressively press down N times toward the upper side of the heat dissipation base, and N is greater than Or a positive number equal to 3, where: the first time the roller module is controlled to be pressed down until the rolling surface of the roller is in pressing contact with the upper side of the heat dissipation base, the mobile platform drives the heat dissipation base along the rolling surface of the roller tangent to The direction moves horizontally once or reciprocates several times; for the second time, the roller module is controlled to continue to descend to a first set height, so that the rolling surface of the roller is in pressing contact with the upper side of the heat dissipation base, and the mobile platform drives the heat dissipation base along the The tangential direction of the rolling surface of the roller moves horizontally once or reciprocally several times; until the Nth time, the roller module is controlled to continue to descend to the N-1th set height, so that the rolling surface of the roller presses against the upper side of the heat dissipation base. In contact, the mobile platform drives the heat dissipation base to move horizontally once or reciprocally several times in a direction tangent to the rolling surface of the roller; the first set height and the N-1th set height have the same or different values. The riveting method of the heat dissipation base and the heat pipe as described in claim 1, wherein the roller is arranged side by side along the direction of the reciprocating horizontal movement of the heat dissipation base. Piece. The riveting method of the heat dissipation base and the heat pipe as described in claim 1, wherein the pre-pressure driving device drives the pre-pressure upper mold to move up and down, and the pre-pressure drive device drives the pre-pressure upper mold toward the upper side of the heat dissipation base. Press down on the boss. The riveting method of the heat dissipation base and the heat pipe as described in claim 1 or 4, wherein the roller module includes a rolling seat and a rolling driving device that drives the rolling seat to move up and down, and the roller is installed on the The bottom of the rolling seat; the rolling driving device drives the roller at the bottom of the rolling seat to gradually press down toward the upper side of the heat dissipation base. The riveting method of the heat dissipation base and the heat pipe as described in claim 7, wherein the rolling driving device has a second motor, the second motor drives a second screw to rotate, and the rolling seat passes through a second slide The internal thread hole of the rail base is threadedly connected to the second screw; when the second motor is working, it drives the second screw to rotate, causing the second slide rail base to move up and down along the second screw, thereby causing the rolling base and The rollers move up and down together; and the operation of the second motor is controlled through a program to realize the progressive pressing of the rollers toward the upper side of the heat dissipation base.