Extrusion type vacuum welding furnace

Abstract

The utility model provides an extrusion type vacuum welding furnace which comprises a cabin body provided with a cabin cover and a heating plate, a first space is formed between the cabin cover and the heating plate, a workpiece is placed in the first space and arranged on the heating plate, an extrusion mechanism is also arranged in the first space and can move in the first space in the first direction, and the extrusion type vacuum welding furnace further comprises a driving assembly. The driving assembly is used for driving the extrusion mechanism to move in the first direction, the extrusion mechanism is provided with an extrusion face, and when the driving assembly drives the extrusion face to make contact with the end, away from the heating plate, of the workpiece, the extrusion mechanism applies pressure to the workpiece; according to the scheme, the extrusion mechanism is arranged to apply pressure to the workpiece placed on the heating plate, bubbles generated by heating the workpiece are discharged, the voidage of welding is reduced, and the welding quality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of workpiece welding, and in particular to an extrusion type vacuum welding furnace. Background Art

[0002] Vacuum reflow soldering technology is an electronic soldering technology performed in a high vacuum or low pressure environment. Compared with traditional reflow soldering technology, a vacuum environment is introduced during the reflow stage to achieve the integration of vacuum and reflow soldering technology. At this time, the solder joint is still in a molten state, and the outside of the solder joint is close to a vacuum state, so that the bubbles inside the solder joint are precipitated outward under the action of the pressure difference, thereby reducing the void rate after soldering and achieving the effect of improving the soldering quality. With the continuous development of electronic components, vacuum soldering technology has also been improved accordingly, and higher requirements are placed on the quality of components after soldering. In the process of vacuum reflow process, positive pressure is added to the process to improve the quality after soldering and reduce the void rate of soldering. However, in the actual welding process, the melting point is increased and the bubble precipitation speed is slow. Squeezing components for a long time to precipitate bubbles will damage the components. Summary of the invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide an extrusion type vacuum welding furnace, comprising:

[0004] A cabin body, the cabin cover and the heating plate, a first space is defined between the cabin cover and the heating plate, and a workpiece is placed on the heating plate;

[0005] An extrusion mechanism, the extrusion mechanism is disposed in the first space, the extrusion mechanism can move in the first space along a first direction, the extrusion mechanism has an extrusion surface, when the extrusion surface contacts the end of the workpiece away from the heating plate, the extrusion mechanism applies pressure to the workpiece;

[0006] A driving assembly, wherein the driving assembly is used to drive the extrusion mechanism to move along the first direction.

[0007] According to the technical solution provided in the embodiment of the present application, the extrusion mechanism includes an extrusion plate, the extrusion plate is provided with the extrusion surface, the extrusion plate is provided with an extrusion assembly on the side away from the workpiece, the extrusion assembly is detachably connected to the driving assembly on the side away from the extrusion plate, and the extrusion assembly applies pressure to the extrusion plate to act on the workpiece.

[0008] According to the technical solution provided in the embodiment of the present application, the extrusion assembly includes a first guide rod, one end of which is fixed to the extrusion plate, and the other end passes through the driving assembly. An elastic member is provided on the outer sleeve of the first guide rod, and the elastic member is placed between the driving part and the extrusion plate. When the elastic member is in a force storage state, pressure is applied to the extrusion plate.

[0009] According to the technical solution provided in the embodiment of the present application, a compression member is further provided on the side of the elastic member away from the extrusion plate, and the compression member can move along the first direction to compress the elastic member.

[0010] According to the technical solution provided in the embodiment of the present application, there may be multiple compression parts.

[0011] According to the technical solution provided in the embodiment of the present application, the hatch cover has a first through hole in the middle; the driving assembly includes a driving part, one end of the driving part is connected to a screw rod, the screw rod passes through the first through hole, the screw rod is provided with a moving part at the end away from the driving part, a plurality of second through holes are provided on the moving part, the first guide rod passes through the second through holes, the first guide rod is provided with a screw at the end away from the extrusion plate, the driving part drives the screw rod to rotate, and drives the moving part and the extrusion assembly to move along the first direction.

[0012] According to the technical solution provided in the embodiment of the present application, it also includes a guide assembly, one end of which is fixed to the hatch cover, the movable part is sleeved outside the guide assembly, the movable part can move along the guide assembly along the first direction, and the guide assembly is used to limit the moving path of the movable part.

[0013] According to the technical solution provided in the embodiment of the present application, a limit assembly is further provided at one end of the movable part, and the limit assembly is used to limit the maximum distance that the movable part can move along the first direction toward the hatch cover side.

[0014] According to the technical solution provided in the embodiment of the present application, heating tubes are further provided in the hatch cover and the heating plate for heating the workpiece.

[0015] In summary, the present application proposes an extrusion type vacuum welding furnace, comprising a cabin body having a cabin cover and a heating plate, wherein a first space is provided between the cabin cover and the heating plate, a workpiece is placed in the first space and built into the heating plate, an extrusion mechanism is also provided in the first space and can move in a first direction in the first space, and further comprises a driving component, wherein the driving component is used to drive the extrusion mechanism to move in the first direction, the extrusion mechanism having an extrusion surface, and when the driving component drives the extrusion surface to contact the end of the workpiece away from the heating plate, the extrusion mechanism applies pressure to the workpiece; in the present scheme, an extrusion mechanism is provided to apply pressure to the workpiece placed on the heating plate, so as to discharge bubbles generated by heating the workpiece, thereby reducing the void rate of welding and improving welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional schematic diagram of an extrusion vacuum welding furnace provided in an embodiment of the present application;

[0017] Figure 2A schematic diagram of the structure of a hatch cover provided in an embodiment of the present application;

[0018] Figure 3 A partial cross-sectional view of an extrusion mechanism provided in an embodiment of the present application (Example 1);

[0019] Figure 4 A partial cross-sectional view of the extrusion mechanism provided in an embodiment of the present application (Example 2).

[0020] The text annotations in the figure represent:

[0021] 1. Cabin body; 11. Cabin cover; 12. Heating plate; 2. Extrusion mechanism; 21. Extrusion plate; 22. Extrusion assembly; 221. First guide rod; 222. Elastic member; 223. Compression member; 3. Driving assembly; 31. Screw rod; 32. Moving part; 33. Driving part; 4. Guide assembly; 41. Second guide rod; 51. Photoelectric switch; 52. Light baffle; 6. Heating tube. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] As mentioned in the background technology, in view of the problems in the prior art, the present application proposes an extrusion type vacuum welding furnace, comprising:

[0025] A cabin body 1, a cabin cover 11 and a heating plate 12, a first space is defined between the cabin cover 11 and the heating plate 12, and a workpiece is placed on the heating plate 12;

[0026] An extrusion mechanism 2, the extrusion mechanism 2 is disposed in the first space, the extrusion mechanism 2 can move in the first space along a first direction, the extrusion mechanism 2 has an extrusion surface, and when the extrusion surface contacts the end of the workpiece away from the heating plate 12, the extrusion mechanism 2 applies pressure to the workpiece;

[0027] A driving assembly 3, wherein the driving assembly 3 is used to drive the extrusion mechanism 2 to move along the first direction;

[0028] In some specific scenarios, please refer to Figure 1The extrusion mechanism 2 shown in the figure, the extrusion mechanism 2 moves along the first direction under the push of the driving component 3, drives the extrusion surface to contact the workpiece, and the extrusion mechanism 2 applies pressure to the workpiece. At this time, the welding point of the workpiece is in a molten state due to the heating of the heating plate 12. The bubbles retained in the workpiece can be squeezed out by squeezing the welding point to avoid more gaps at the welding point after cooling. The first direction is the vertical direction, and the pressure applied by the extrusion mechanism 2 to the workpiece can be reasonably adjusted according to the characteristics of the workpiece itself and the process requirements;

[0029] In summary, the present solution provides an extrusion mechanism 2 to apply pressure to the workpiece placed on the heating plate 12 to discharge bubbles generated by heating the workpiece, thereby reducing the void rate of welding and improving welding quality.

[0030] In a preferred embodiment, the extrusion mechanism 2 includes an extrusion plate 21, the extrusion plate 21 is provided with the extrusion surface, the extrusion plate 21 is provided with an extrusion assembly 22 on the side away from the workpiece, the extrusion assembly 22 is detachably connected to the driving assembly 3 on the side away from the extrusion plate 21, and the extrusion assembly 22 applies pressure to the extrusion plate 21 to act on the workpiece;

[0031] In some specific scenarios, please refer to Figure 1 In the extrusion mechanism 2 shown, the shape of the extrusion plate 21 can be reasonably configured according to the shape of the workpiece and the processing requirements; the extrusion component 22 is used to apply different pressure values ​​to the extrusion plate 21; the driving component 3 drives the extrusion component 22 to move along the vertical direction, and drives the extrusion plate 21 to move along the vertical direction.

[0032] In a preferred embodiment, the extrusion assembly 22 includes a first guide rod 221, one end of the first guide rod 221 is fixed to the extrusion plate 21, and the other end passes through the driving assembly 3. The first guide rod 221 is provided with an elastic member 222 on its outer sleeve, and the elastic member is placed between the driving portion and the extrusion plate. When the elastic member 222 is in a force storage state, it applies pressure to the extrusion plate 21.

[0033] In some specific scenarios, please refer to Figure 1 The extrusion assembly 22 shown in the figure, the first guide rod 221 is provided with an external thread at the end away from the extrusion plate 21, the driving assembly 3 is provided with a through hole, the first guide rod 221 passes through the through hole and the position of the first guide rod 221 is locked by a nut; the elastic member 222 is a spring, when the spring is in a compressed state, the spring applies a force to the outer pressure plate, transmits the pressure to the workpiece, so that the welding point of the workpiece is squeezed; wherein, there are four first guide rods 221, which are circumferentially arranged on the driving assembly 3.

[0034] In a preferred embodiment, a compression member 223 is further provided on the side of the elastic member 222 away from the extrusion plate 21, and the compression member 223 can move along the first direction to compress the elastic member 222;

[0035] In some specific scenarios, please refer to Figure 1 In the extrusion assembly 22 shown, the compression member 223 may be a nut sleeved on the outer wall of the first guide rod 221, the nut compresses the spring, and the spring is extruded and acts in the opposite direction on the extrusion plate 21;

[0036] A pressure sensing component is placed on the heating plate 12, wherein the pressure sensing component has a sensing surface, and the sensing surface is kept level with the end of the workpiece away from the heating plate 12, and when the extrusion surface contacts the workpiece, it also contacts the pressure sensor;

[0037] In a preferred embodiment, the number of the compression members 223 may be multiple;

[0038] In some specific scenarios, please refer to Figure 1 The compression members 223 shown are adjusted in number according to the shape of the workpiece and process requirements, thereby changing the degree of compression of the spring and the magnitude of the force applied to the workpiece.

[0039] In a preferred embodiment, the hatch cover 11 has a first through hole in the middle; the driving assembly 3 includes a driving part 33, one end of the driving part 33 is connected to a screw rod 31, the screw rod 31 passes through the first through hole, the end of the screw rod 31 away from the driving part 33 is sleeved with a moving part 32, a plurality of second through holes are provided on the moving part 32, the first guide rod 221 passes through the second through hole, the end of the first guide rod 211 away from the extrusion plate 21 is provided with a screw, the driving part 33 drives the screw rod 31 to rotate, and drives the moving part 32 and the extrusion assembly 22 to move along the first direction;

[0040] In some specific scenarios, please refer to Figure 1 The driving assembly 3 shown in the figure, the driving part 33 includes a motor and a magnetic fluid, the motor is connected to the magnetic fluid, the magnetic fluid is connected to the screw rod 31 away from the motor end, the rotation of the motor and the magnetic fluid drives the screw rod 31 to rotate, the screw rod 31 is provided with a nut at the end away from the driving part 33, the moving part 32 is fixedly connected to the nut, the moving part 32 is connected to the screw rod 31 through the nut, and the rotation of the screw rod 31 drives the nut and the moving part 32 to move along the vertical direction.

[0041] In a preferred embodiment, it further comprises a guide assembly 4, one end of which is fixed to the hatch 11, the moving portion 32 is sleeved outside the guide assembly 4, the moving portion 32 can move along the guide assembly 4 along the first direction, and the guide assembly 4 is used to limit the moving path of the moving portion 32;

[0042] In some specific scenarios, please refer to Figure 1 The guide assembly 4 shown in the figure comprises a second guide rod 41 distributed at both ends of the movable part 32 along the horizontal direction, the extension direction of the second guide rod 41 is the vertical direction, the guide rod is movably connected to the movable part 32, so as to facilitate the movement of the movable part 32 along the second guide rod 41 along the first direction, thereby avoiding the displacement of the movable part 32 during the movement; the movable part 32 is an irregular flat plate, so as to facilitate the installation of the second guide rod 41 and the first guide rod 221.

[0043] In a preferred embodiment, a limit assembly is further provided at one end of the moving part, and the limit assembly is used to limit the maximum distance that the moving part 32 can move along the first direction toward the side close to the hatch cover 11;

[0044] In some specific scenarios, please refer to Figure 1 The limit assembly shown in the figure includes a photoelectric switch 51 arranged at both ends of the hatch 11 in the horizontal direction, and the limit assembly also includes a light blocking plate 52 arranged at one end of the moving part 32. When the photoelectric switch 51 detects the light blocking plate 52, the motor stops rotating.

[0045] In a preferred embodiment, it is characterized in that: a heating tube 6 is further provided in the hatch 11 and the heating plate 12 for heating the workpiece;

[0046] In some specific scenarios, please refer to Figure 1 The heating pipe 6 shown in the figure is laid inside the hatch 11 and the heating pipe 6, and the heating plate 12 is heated by the heating pipe 6 and transferred to the workpiece, so that the target welding temperature is reached in the first space;

[0047] In summary, in order to squeeze out the bubbles at the welding points of the workpieces, there are two specific methods for debugging the welding furnace:

[0048] Method 1: Rotate the motor to drive the screw 31 to rotate, drive the moving part 32 and the extrusion plate 21 to move along the vertical direction toward the workpiece, so that the extrusion surface of the extrusion plate 21 contacts the workpiece placed on the heating plate 12 (at this time, the extrusion plate 21 and the workpiece do not generate any pressure), rotate the motor in the opposite direction to raise the extrusion plate 21, remove the nuts fixing the first guide rod 221 in turn, and sleeve a nut on the outside of the first guide rod 221, and fix the first guide rod 221 to the moving part 32, drive the motor to rotate to drive the moving part 32 toward the heating plate 12, and rotate the motor to drive the moving part 32 toward the heating plate 12. The workpiece moves sideways and contacts the workpiece, and the value of the pressure sensor is observed to see whether it reaches the predetermined value required by the workpiece. If so, the pressure sensor is taken out, the hatch 11 is closed, the heating tube 6 is turned on, and the workpiece is heated. If the predetermined value is not reached, the motor is rotated in the opposite direction again to drive the moving part 32 and the extrusion plate 21 away from the workpiece in the vertical direction, and the nut is again put on the first guide rod 221 to squeeze the spring, and the motor is rotated to drive the extrusion plate 21 to contact the workpiece again, and the value of the pressure sensor is observed. The test is repeated multiple times until the pressure value meets the established requirements.

[0049] Method 2: Rotate the motor to drive the screw 31 to rotate, drive the moving part 32 and the extrusion plate 21 to move along the vertical direction toward the workpiece, so that the extrusion surface of the extrusion plate 21 contacts the workpiece placed on the heating plate 12 (at this time, the extrusion plate 21 and the workpiece do not generate any pressure), according to the pressure value required by the process of the workpiece and the elastic modulus of the spring, the compression state of the spring when the pressure is reached is deduced, the number of nuts to be added is estimated, the motor is rotated in the opposite direction, the extrusion plate 21 is raised, the nuts fixing the first guide rod 221 are removed in turn, and a predetermined number of nuts are sleeved on the outside of the first guide rod 221, and the value of the pressure sensor is observed. If the value is reached, the pressure sensor is removed, the hatch 11 is closed, and the heating tube 6 is turned on to heat the workpiece; if the preset value is not reached, the number of compression members 223 is increased or decreased according to the value displayed by the pressure sensor, and multiple tests are performed until the preset value is reached.

[0050] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. An extrusion vacuum welding furnace, characterized in that: include: A cabin body (1) comprises a cabin cover (11) and a heating plate (12), wherein a first space is provided between the cabin cover (11) and the heating plate (12), and a workpiece is placed on the heating plate (12); an extrusion mechanism (2), the extrusion mechanism (2) being arranged in the first space, the extrusion mechanism (2) being movable in the first space along a first direction, the extrusion mechanism (2) having an extrusion surface, and when the extrusion surface contacts the end of the workpiece away from the heating plate (12), the extrusion mechanism (2) applies pressure to the workpiece; A driving assembly (3), the driving assembly (3) being used to drive the extrusion mechanism (2) to move along the first direction.

2. The extrusion type vacuum welding furnace according to claim 1, characterized in that: The extrusion mechanism (2) comprises an extrusion plate (21), the extrusion plate (21) being provided with the extrusion surface, the extrusion plate (21) being provided with an extrusion assembly (22) on the side away from the workpiece, the extrusion assembly (22) being detachably connected to the drive assembly (3) on the side away from the extrusion plate (21), and the extrusion assembly (22) applying pressure to the extrusion plate (21) to act on the workpiece.

3. The extrusion type vacuum welding furnace according to claim 2, characterized in that: The extrusion assembly (22) comprises a first guide rod (221), one end of the first guide rod (221) is fixed to the extrusion plate (21), and the other end passes through the drive assembly (3), an elastic member (222) is provided on the outer sleeve of the first guide rod (221), the elastic member is arranged between the drive unit and the extrusion plate, and when the elastic member (222) is in a force storage state, pressure is applied to the extrusion plate (21).

4. The extrusion type vacuum welding furnace according to claim 3, characterized in that: A compression member (223) is also provided on the side of the elastic member (222) away from the extrusion plate (21); the compression member (223) is movable along the first direction and is used to compress the elastic member (222).

5. The extrusion type vacuum welding furnace according to claim 4, characterized in that: The number of the compression members (223) may be multiple.

6. The extrusion type vacuum welding furnace according to claim 3, characterized in that: The hatch cover (11) has a first through hole in the middle; the driving assembly (3) comprises a driving part (33); one end of the driving part (33) is connected to a screw rod (31); the screw rod (31) passes through the first through hole; an end of the screw rod (31) away from the driving part (33) is sleeved with a moving part (32); a plurality of second through holes are provided on the moving part (32); the first guide rod (221) passes through the second through holes; an end of the first guide rod (221) away from the extrusion plate (21) is provided with a screw; the driving part (33) drives the screw rod (31) to rotate, thereby driving the moving part (32) and the extrusion assembly (22) to move along the first direction.

7. The extrusion type vacuum welding furnace according to claim 6, characterized in that: It also comprises a guide assembly (4), one end of the guide assembly (4) being fixed to the hatch cover (11), the movable portion (32) being sleeved outside the guide assembly (4), the movable portion (32) being movable along the guide assembly (4) along the first direction, and the guide assembly (4) being used to limit the moving path of the movable portion (32).

8. The extrusion type vacuum welding furnace according to claim 6, characterized in that: A limit assembly is also provided at one end of the movable portion, the limit assembly being used to limit the maximum distance that the movable portion (32) can move along the first direction towards the side close to the hatch cover (11).

9. The extrusion type vacuum welding furnace according to claim 1, characterized in that: A heating tube (6) is also provided inside the hatch cover (11) and the heating plate (12) for heating the workpiece.

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