Positioning clamp device of vacuum reflow furnace for chip production

Abstract

The application relates to the chip welding technical field, in particular to a positioning clamp device of a vacuum reflow furnace for chip production, which comprises a vacuum reflow furnace body and a clamp butt joint plate, the clamp butt joint plate is arranged in the inside of the vacuum reflow furnace body, the clamp butt joint plate is U-shaped and plate-shaped, the inside of the clamp butt joint plate is symmetrically provided with descending prisms and ascending prisms near both sides, the descending prisms and the ascending prisms are staggered, and the upper part of the descending prisms and the lower part of the ascending prisms are fixedly provided with anti-falling clamping discs; the positioning clamp device of the vacuum reflow furnace can clamp and limit the circuit board through the staggered movement of the descending prisms and the ascending prisms, and the surface ridges of the descending prisms and the ascending prisms are in contact with the side edges of the circuit board to drive and convey the circuit board, so that the circuit board can be greatly prevented from slipping, and the surface ridges of the descending prisms and the ascending prisms cannot leave clamping marks on the front and back surface areas of the circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of chip welding, in particular to a positioning fixture device of a vacuum reflow furnace for chip production. Background Art

[0002] During the production process, when the chip needs to be soldered to the PCB circuit board, in order to ensure the welding quality, in some high-demand scenarios, the welding needs to be carried out through a vacuum reflow furnace. The vacuum reflow furnace performs high-quality welding on the product in a vacuum environment, and is used to protect the product and solder from oxidation under vacuum conditions. At the same time, the oxides on the surface of the product and solder are reacted, so that the welding surface quality is improved and the welding void rate is reduced. In the vacuum reflow furnace, the circuit board with the chip is clamped and transferred by a positioning fixture. The positioning fixture in the existing technology clamps and transfers the front and back surfaces of the circuit board through roller clamping. When the clamping is too loose, the anti-slip performance is poor. When the clamping is too tight, it is easy to leave clamping marks on the front and back surfaces of the circuit board. In the cooling stage, it can only be cooled by the jet structure set in the vacuum reflow furnace. The gas travels a long distance in the vacuum reflow furnace. After reaching the circuit board, it will be affected by the residual temperature of the vacuum reflow furnace and cause a large temperature rise, thereby reducing the cooling efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a positioning fixture device for a vacuum reflow furnace for chip production, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a positioning fixture device for a vacuum reflow furnace for chip production, comprising a vacuum reflow furnace body and a fixture docking plate, the fixture docking plate being arranged inside the vacuum reflow furnace body, the fixture docking plate being a U-shaped plate, the interior of the fixture docking plate being symmetrically provided with descending prisms and ascending prisms near both sides, the descending prisms and ascending prisms being staggered, the upper part of the descending prism and the lower part of the ascending prism being fixedly provided with anti-slip chucks, a pre-cooling plate being fixedly provided inside the fixture docking plate, straight-blowing oblique cavities being symmetrically provided near the upper position on both side surfaces of the fixture docking plate, a lifting transmission column being coaxially fixedly provided at the lower end of the descending prism and the ascending prism, a split turntable being rotatably provided at the lower end of the lifting transmission column, a functional spring being connected to the lower surface of the split turntable, a detection sensor being fixedly provided on the inner wall surface of the fixture docking plate, and an air supply structure with a sequential connection function being provided in communication between the pre-cooling plate and the straight-blowing oblique cavity.

[0005] The air supply structure includes a direct blowing air path, a delay branch pipe and a control air pipe. The direct blowing air path is arranged on the inner wall surface of the fixture docking plate. The two ends of the direct blowing air path are respectively connected to the direct blowing oblique cavity. The surface of the direct blowing air path is connected with a delay branch pipe, and the upper end of the delay branch pipe is connected with a control air pipe.

[0006] The interior of the control air pipe is airtightly provided with a pressure piston and a delay piston, an intermediate plug rod is connected between the pressure piston and the delay piston, a spring convex ring is fixedly provided on the inner wall surface of the control air pipe, the spring convex ring is located between the pressure piston and the delay piston, and a return spring is provided between the spring convex ring and the pressure piston.

[0007] An air intake main is provided on the surface of one end of the control air pipe close to the pressure piston, an exhaust hole is provided through the surface of one end of the control air pipe close to the delay piston, an instantaneous branch pipe is provided between the control air pipe and the pre-cooling plate, and the connecting port between the instantaneous branch pipe and the control air pipe is located on the side of the pressure piston away from the delay piston.

[0008] An upper horizontal frame is provided below the descending prism and the ascending prism, the lifting transmission column is inserted through the upper horizontal frame, a relay gear is provided for rotation inside the upper horizontal frame, a column slot is provided inside the lifting transmission column, a gear clamp is fixedly provided inside the relay gear, the gear clamp is inserted through the column slot, the lower end of the functional spring corresponding to the descending prism is connected to a pull-down connecting frame, and the lower end of the functional spring corresponding to the ascending prism is connected to a lifting connecting frame.

[0009] The lower surfaces of the pull-down connecting frame and the lifting connecting frame are respectively fixed with reverse racks, and the two groups of reverse racks are arranged opposite to each other. Bidirectional driving teeth are meshed between the two groups of reverse racks, and a limiting frame is installed on the outer sleeve of the reverse racks, and the bidirectional driving teeth are rotatably installed with the limiting frame.

[0010] A clamping motor is fixedly provided on the outer surface of the limit frame, and the clamping motor drives the bidirectional driving teeth to rotate. A connecting back plate is fixedly provided on the outer surface of the limit frame, and a toothed belt back plate is fixedly provided on the surface of the upper horizontal frame, and the toothed belt back plate is fixedly installed with the connecting back plate.

[0011] A transmission toothed belt is provided on one side of the toothed belt back plate, and the transmission toothed belt is in contact and meshing with the relay gear. Support end wheels are provided at both ends of the upper horizontal frame, and the support end wheels support and expand the transmission toothed belt. A transmission motor is fixedly provided on the outside of the upper horizontal frame, and the transmission motor drives the support end wheels to rotate, thereby driving the transmission toothed belt to rotate.

[0012] An upper shaft and a two-way connecting shaft are fixedly provided inside the fixture docking plate. The upper shaft passes through the upper cross frame, the two-way connecting shaft passes through the connecting back plate, and the outside of the two-way connecting shaft is symmetrically sleeved with a spring sleeve plate.

[0013] A translation transfer spring is connected between the spring sleeve and the connecting back plate, a synchronous control cylinder is fixedly provided on the surface of the spring sleeve, a fixed vertical platform is fixedly provided at the middle position of the bidirectional coupling, and the telescopic shaft of the synchronous control cylinder is fixedly installed on the fixed vertical platform.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The positioning fixture device of the vacuum reflow furnace of the present invention clamps and limits the circuit board through the staggered movement of the descending prism and the ascending prism, and utilizes the surface ribs of the descending prism and the ascending prism to contact the side of the circuit board to transmit and transport the circuit board. It can not only greatly prevent slipping, but also the surface ribs of the descending prism and the ascending prism will not leave clamping marks on the front and back areas of the circuit board. At the same time, it can automatically adapt to circuit boards of different thicknesses and widths, and adapt to elastic changes when the volume of the circuit board changes due to thermal expansion and contraction.

[0016] In a vacuum reflow furnace, cooling is required after vacuum reflow soldering is completed. The positioning fixture device of the present invention can achieve direct blowing cooling at a closer distance, reduce gas temperature rise, and improve cooling efficiency. The pre-cooling plate, the direct blowing oblique cavity and the air supply structure are arranged to automatically control the connection sequence during cooling and air supply. First, the pre-cooling plate pre-cools the circuit board from the back of the circuit board, so that the molten solder is initially cooled and solidified. Then, the chip on the upper surface of the circuit board is directly blown at a close distance through the direct blowing oblique cavity to cool it, thereby reducing the probability of accidental chip offset caused by the cooling gas directly blowing on the chip on the upper surface of the circuit board when the solder is molten.

[0017] The circuit board is clamped and positioned by the descending prism and the ascending prism, and by cooperating with the functional spring, the circuit board can elastically cushion the rise and fall in the vertical direction. As a result, when there are chip components on the back of the lower surface of the circuit board, the circuit board can elastically float up for cushioning after the pre-cooling plate sprays pre-cooling gas, reducing the instantaneous impact of the air jet on the chip components in the molten state of the solder, and reducing the probability of accidental displacement of the chip on the back of the circuit board during cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 Schematic diagram of the positioning fixture of the present invention.

[0020] Figure 3 It is the front view of the positioning fixture of the present invention.

[0021] Figure 4 It is a top view of the positioning fixture of the present invention.

[0022] Figure 5 It is a three-dimensional half-section schematic diagram.

[0023] Figure 6 This is a schematic diagram of a three-dimensional half-section from another angle.

[0024] Figure 7 It is a three-dimensional half-section schematic diagram of the bidirectional coupling.

[0025] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0026] Figure 9 It is a three-dimensional half-section diagram of the control trachea.

[0027] Figure 10 for Figure 9 Enlarged view of point B in the middle.

[0028] Figure: 1, vacuum reflow furnace body; 2, fixture docking plate; 3, descending prism; 4, ascending prism; 5, anti-drop chuck; 6, pre-cooling plate; 7, straight blowing oblique cavity; 8, lifting transmission column; 9, split turntable; 10, function spring; 11, detection sensor; 801, upper horizontal frame; 802, relay gear; 803, column slot; 804, gear clamping plate; 805, pull-down connecting frame; 806, lifting connecting frame; 807, reverse rack; 808, two-way driving gear; 809, limit frame; 810, clamping motor; 811, connecting back plate; 8 12. Toothed belt back plate; 813. Transmission toothed belt; 814. Support end wheel; 815. Transmission motor; 816. Upper shaft; 817. Bidirectional coupling; 818. Spring sleeve; 819. Translational transmission spring; 820. Synchronous control cylinder; 821. Fixed vertical platform; 201. Direct blowing air path; 202. Delay branch pipe; 203. Control air pipe; 204. Pressure piston; 205. Delay piston; 206. Intermediate plug rod; 207. Spring cam; 208. Return spring; 209. Intake manifold; 210. Instantaneous branch pipe; 211. Exhaust hole. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1 to 10The present invention provides a technical solution: a positioning fixture device for a vacuum reflow furnace for chip production, comprising a vacuum reflow furnace body 1 and a fixture docking plate 2, the fixture docking plate 2 is arranged inside the vacuum reflow furnace body 1, the fixture docking plate 2 is a U-shaped plate, the interior of the fixture docking plate 2 is symmetrically distributed near the two sides thereof with descending prisms 3 and ascending prisms 4, the descending prisms 3 and the ascending prisms 4 are staggered, the upper part of the descending prism 3 and the lower part of the ascending prism 4 are fixedly provided with an anti-slip chuck 5, a pre-cooling plate 6 is fixedly provided inside the fixture docking plate 2, the interior of the pre-cooling plate 6 is a cavity structure, an air groove is opened on the upper surface, and the surfaces of both sides of the fixture docking plate 2 are A straight-blowing oblique cavity 7 is symmetrically arranged near the upper position, and an inclined air gap is opened on the side surface of the straight-blowing oblique cavity 7. The air gap faces the upper surface of the circuit board. A lifting transmission column 8 is coaxially fixed at the lower end of the descending prism 3 and the ascending prism 4. A split turntable 9 is rotatably arranged at the lower end of the lifting transmission column 8. A functional spring 10 is connected to the lower surface of the split turntable 9. A detection sensor 11 is fixed on the inner wall surface of the fixture docking plate 2. The detection sensor 11 can detect the circuit board. The detection sensor 11 can be an infrared radiation sensor. An air supply structure with a sequential connection function is connected between the pre-cooling plate 6 and the straight-blowing oblique cavity 7.

[0031] The air supply structure includes a direct blowing air path 201, a delay branch pipe 202 and a control air pipe 203. The direct blowing air path 201 is arranged on the inner wall surface of the fixture docking plate 2. The two ends of the direct blowing air path 201 are respectively connected to the direct blowing oblique cavity 7. The surface of the direct blowing air path 201 is connected with the delay branch pipe 202. The upper end of the delay branch pipe 202 is connected with the control air pipe 203. The interior of the control air pipe 203 is airtightly provided with a pressure piston 204 and a delay piston 205. An intermediate plug rod 206 is connected between the pressure piston 204 and the delay piston 205. A spring convex ring 207 is fixedly provided on the inner wall surface of the control air pipe 203. The spring convex ring 207 is located between the pressure piston 204 and the delay piston 205. A return spring 208 is provided between the spring convex ring 207 and the pressure piston 204.

[0032] An air intake manifold 209 is provided on the surface of one end of the control air pipe 203 close to the pressure piston 204. When in use, the air intake manifold 209 is connected to the external high-pressure cooling air source through the air pipe. The above-mentioned air pipe is insulated. An exhaust hole 211 is penetrated through the surface of one end of the control air pipe 203 close to the delay piston 205. An instantaneous branch pipe 210 is provided between the control air pipe 203 and the pre-cooling plate 6. The connecting port of the instantaneous branch pipe 210 and the control air pipe 203 is located on the side of the pressure piston 204 away from the position of the delay piston 205.

[0033] An upper horizontal frame 801 is provided below the descending prism 3 and the ascending prism 4, and the lifting transmission column 8 passes through the upper horizontal frame 801. A relay gear 802 is provided for rotation inside the upper horizontal frame 801. A column slot 803 is provided inside the lifting transmission column 8, and a gear clamping plate 804 is fixedly provided inside the relay gear 802. The gear clamping plate 804 passes through the column slot 803. The lower end of the functional spring 10 corresponding to the descending prism 3 is connected with a pull-down connecting frame 805, and the lower end of the functional spring 10 corresponding to the ascending prism 4 is connected with a lifting connecting frame 806.

[0034] The lower surfaces of the pull-down connecting frame 805 and the lifting connecting frame 806 are respectively fixed with reverse racks 807, and the two groups of reverse racks 807 are arranged opposite to each other. A bidirectional driving tooth 808 is meshed between the two groups of reverse racks 807, and a limiting frame 809 is installed on the outer sleeve of the reverse rack 807. The bidirectional driving tooth 808 is rotatably installed with the limiting frame 809.

[0035] A clamping motor 810 is fixedly provided on the outer surface of the limit frame 809, and the clamping motor 810 drives the bidirectional driving teeth 808 to rotate. A connecting back plate 811 is fixedly provided on the outer surface of the limit frame 809, and a toothed belt back plate 812 is fixedly provided on the surface of the upper horizontal frame 801. The toothed belt back plate 812 is fixedly installed with the connecting back plate 811.

[0036] A transmission toothed belt 813 is provided on one side of the toothed belt back plate 812, and the transmission toothed belt 813 is in contact and meshing with the relay gear 802. Support end wheels 814 are provided at both ends of the upper horizontal frame 801, and the support end wheels 814 support and expand the transmission toothed belt 813. A transmission motor 815 is fixedly provided on the outside of the upper horizontal frame 801, and the transmission motor 815 drives the support end wheels 814 to rotate, thereby driving the transmission toothed belt 813 to rotate.

[0037] An upper shaft 816 and a two-way connecting shaft 817 are fixedly provided inside the fixture docking plate 2. The upper shaft 816 passes through the upper cross frame 801, and the two-way connecting shaft 817 passes through the connecting back plate 811. The outside of the two-way connecting shaft 817 is symmetrically sleeved with a spring sleeve plate 818.

[0038] A translation transfer spring 819 is connected between the spring sleeve 818 and the connecting back plate 811. A synchronous control cylinder 820 is fixedly provided on the surface of the spring sleeve 818. A fixed vertical platform 821 is fixedly provided in the middle position of the bidirectional connecting shaft 817. The telescopic shaft of the synchronous control cylinder 820 is fixedly installed on the fixed vertical platform 821.

[0039] When the positioning fixture device of the present invention is in use, it is arranged end to end. When a circuit board with a chip is transmitted over, the circuit board is detected by the detection sensor 11 on one side, and then two sets of symmetrical synchronous control cylinders 820 contract at the same time, so that the translation transfer spring 819 pulls the connecting backboard 811 and the upper cross frame 801 and other structures to move elastically toward the middle, so that the descending prism 3 and the ascending prism 4 cooperate with the descending prism 3 and the ascending prism 4 on the other side and clamp them on the side surface of the circuit board.

[0040] Then the clamping motor 810 drives the bidirectional driving gear 808 to rotate, as shown in FIG. Figure 8 As shown in the figure, the two sets of reverse racks 807 move in opposite directions respectively, thereby driving the pull-down connecting frame 805 to move downward and the lifting connecting frame 806 to move upward. Through the elastic connection of the functional spring 10, the descending prism 3 elastically descends and the ascending prism 4 elastically rises, and the anti-slip clamp 5 is used to limit the upper and lower positions of the circuit board.

[0041] When the clamp transmits the circuit board, the transmission motor 815 drives the support end wheel 814 to rotate, thereby driving the transmission toothed belt 813 to rotate. With the support of the toothed belt back plate 812, the transmission toothed belt 813 can maintain engagement with the relay gear 802, thereby causing the relay gear 802 to rotate. Since the gear clamp 804 in the relay gear 802 passes through the column slot 803, when the relay gear 802 rotates, it can drive the lifting transmission column 8 to rotate without affecting the lifting movement of the lifting transmission column 8. When the lifting transmission column 8 rotates, it drives the descending prism 3 and the ascending prism 4 to rotate, thereby transmitting and moving the circuit board.

[0042] When the detection sensor 11 on the other side detects that the circuit board has been removed, similarly to the above, the synchronous control cylinder 820 extends and the clamping motor 810 reverses to control all components to return to their initial states.

[0043] In the vacuum reflow furnace, after vacuum reflow welding is completed, during cooling, pressurized cooling gas is input through the air intake main pipe 209. After the above gas pressure is diverted through the instantaneous branch pipe 210, the force acting on the surface of the pressure piston 204 must be able to overcome the supporting elastic force and friction force of the return spring 208, so that the pressure piston 204 and the delay piston 205 move axially; the above gas pressure acting on the surface of the pressure piston 204 can be adjusted by changing the pressure of the gas supply or by changing the diameter of the instantaneous branch pipe 210.

[0044] After the pressure cooling gas is inputted by the intake manifold 209, the gas is first diverted through the instantaneous branch pipe 210 and ejected from the pre-cooling plate 6, which pre-cools the back surface of the circuit board, thereby reducing the overall temperature of the circuit board, thereby causing the solder on the upper surface of the circuit board to initially solidify; since the pressure piston 204 is subjected to thrust, the gas is gradually discharged from the exhaust hole 211 under the push of the delay piston 205, causing the pressure piston 204 to exhibit slow axial displacement; when the pressure piston 204 moves to the other side of the delay branch pipe 202, the gas is diverted to the delay branch pipe 202, causing the direct blowing oblique cavity 7 to eject the cooling airflow, which is obliquely sprayed on the upper surface of the circuit board, directly blowing and cooling the circuit board at a close distance.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture device for a vacuum reflow furnace for chip production, comprising a vacuum reflow furnace body (1) and a fixture docking plate (2), characterized in that: The fixture docking plate (2) is arranged inside the vacuum reflow furnace body (1), and the fixture docking plate (2) is a U-shaped plate. The interior of the fixture docking plate (2) is symmetrically distributed with descending prisms (3) and ascending prisms (4) near both sides. The descending prisms (3) and ascending prisms (4) are staggered. The upper part of the descending prism (3) and the lower part of the ascending prism (4) are fixedly provided with an anti-slip clamping plate (5). A pre-cooling plate (6) is fixedly provided inside the fixture docking plate (2). Both sides of the fixture docking plate (2) are provided with a plurality of pre-cooling plates (6). A straight-blowing oblique cavity (7) is symmetrically provided near the upper portion of the surface, a lifting transmission column (8) is coaxially fixedly provided at the lower ends of the descending prism (3) and the ascending prism (4), a split turntable (9) is rotatably provided at the lower end of the lifting transmission column (8), a functional spring (10) is connected to the lower surface of the split turntable (9), a detection sensor (11) is fixedly provided on the inner wall surface of the fixture docking plate (2), and an air supply structure with a sequential connection function is provided between the pre-cooling plate (6) and the straight-blowing oblique cavity (7); The air supply structure comprises a direct blowing air path (201), a time delay branch pipe (202) and a control air pipe (203); the direct blowing air path (201) is arranged on the inner wall surface of the fixture docking plate (2); the two ends of the direct blowing air path (201) are respectively connected to the direct blowing oblique cavity (7); the surface of the direct blowing air path (201) is connected to the time delay branch pipe (202); the upper end of the time delay branch pipe (202) is connected to the control air pipe (203); the interior of the control air pipe (203) is airtightly provided with a pressure piston (204) and a time delay piston (205); an intermediate plug rod (206) is connected between the pressure piston (204) and the time delay piston (205); a spring convex ring is fixedly provided on the inner wall surface of the control air pipe (203) (207), the spring convex ring (207) is located between the pressure piston (204) and the delay piston (205), and a return spring (208) is provided between the spring convex ring (207) and the pressure piston (204); an intake manifold (209) is provided on the surface of one end of the control air pipe (203) close to the pressure piston (204), an exhaust hole (211) is provided through the surface of one end of the control air pipe (203) close to the delay piston (205), an instantaneous branch pipe (210) is provided between the control air pipe (203) and the pre-cooling plate (6), and the connecting port of the instantaneous branch pipe (210) and the control air pipe (203) is located on the side of the pressure piston (204) away from the position of the delay piston (205).

2. The positioning fixture device for a vacuum reflow furnace for chip production according to claim 1, characterized in that: An upper horizontal frame (801) is provided below the descending prism (3) and the ascending prism (4), the lifting transmission column (8) is inserted through the upper horizontal frame (801), and a relay gear (802) is rotatably provided inside the upper horizontal frame (801), a column slot (803) is provided through the interior of the lifting transmission column (8), a gear clamping plate (804) is fixedly provided inside the relay gear (802), and the gear clamping plate (804) is inserted through the column slot (803), the lower end of the functional spring (10) corresponding to the descending prism (3) is connected to a pull-down connecting frame (805), and the lower end of the functional spring (10) corresponding to the ascending prism (4) is connected to a lifting connecting frame (806).

3. The positioning fixture device for a vacuum reflow furnace for chip production according to claim 2, characterized in that: Reverse racks (807) are fixedly provided on the lower surfaces of the pull-down connecting frame (805) and the lifting connecting frame (806), respectively. The two groups of reverse racks (807) are arranged opposite to each other, and bidirectional driving teeth (808) are meshed between the two groups of reverse racks (807). A limiting frame (809) is installed on the outer sleeve of the reverse racks (807), and the bidirectional driving teeth (808) are rotatably installed with the limiting frame (809).

4. The positioning fixture device for a vacuum reflow furnace for chip production according to claim 3, characterized in that: A clamping motor (810) is fixedly provided on the outer surface of the limit frame (809), and the clamping motor (810) drives the bidirectional driving teeth (808) to rotate. A connecting back plate (811) is fixedly provided on the outer surface of the limit frame (809), and a toothed belt back plate (812) is fixedly provided on the surface of the upper horizontal frame (801), and the toothed belt back plate (812) is fixedly mounted on the connecting back plate (811).

5. The positioning fixture device for a vacuum reflow furnace for chip production according to claim 4, characterized in that: A transmission toothed belt (813) is provided on one side of the toothed belt back plate (812), and the transmission toothed belt (813) is in contact and meshing engagement with the relay gear (802). Support end wheels (814) are provided at both ends of the upper horizontal frame (801), and the support end wheels (814) support and expand the transmission toothed belt (813). A transmission motor (815) is fixedly provided on the outside of the upper horizontal frame (801), and the transmission motor (815) drives the support end wheels (814) to rotate, thereby driving the transmission toothed belt (813) to rotate.

6. The positioning fixture device for a vacuum reflow furnace for chip production according to claim 5, characterized in that: An upper shaft (816) and a bidirectional connecting shaft (817) are fixedly provided inside the fixture docking plate (2); the upper shaft (816) is inserted through the upper cross frame (801); the bidirectional connecting shaft (817) is inserted through the connecting back plate (811); and a spring sleeve plate (818) is symmetrically sleeved on the outside of the bidirectional connecting shaft (817).

7. The positioning fixture device for a vacuum reflow furnace for chip production according to claim 6, characterized in that: A translation transmission spring (819) is connected between the spring sleeve (818) and the connecting back plate (811), a synchronous control cylinder (820) is fixedly provided on the surface of the spring sleeve (818), a fixed vertical platform (821) is fixedly provided at the middle position of the bidirectional connecting shaft (817), and the telescopic shaft of the synchronous control cylinder (820) is fixedly installed on the fixed vertical platform (821).

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