Square MOV varistor laser welding machine

Abstract

The utility model discloses a square metal oxide varistor (MOV) laser welding machine which comprises a machine frame, a rotating disc device, an upper electrode plate feeding mechanism, a first tin paste coating mechanism, an MOV ceramic plate feeding mechanism, a second tin paste coating mechanism, a lower electrode plate feeding mechanism, a double-face laser welding mechanism, a blowing and sucking mechanism and a discharging mechanism. And the jig is provided with an upper electrode slice positioning groove, an MOV ceramic chip positioning groove and a lower electrode slice positioning groove which correspond to the upper electrode slice feeding mechanism, the MOV ceramic chip feeding mechanism and the lower electrode slice feeding mechanism. Feeding, mounting and welding operations of all parts of the piezoresistor are fully automatic, a large amount of manual labor is saved, and the production efficiency is improved; besides, the jig is provided with an upper electrode plate positioning groove, an MOV ceramic plate positioning groove and a lower electrode plate positioning groove, so that all parts can be fed in one step, the intermediate material transfer operation is omitted, the working procedure is simplified, and the production efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pressure sensitive resistance production equipment technology, especially a square MOV pressure sensitive resistance laser welding machine. BACKGROUND

[0002] In the field of electronic component manufacturing, the production process of pressure sensitive resistance is crucial for ensuring product quality and performance. However, existing pressure sensitive resistance production equipment fails to achieve complete automation in key operations such as feeding, assembling, and welding, which leads to low production efficiency and increased operational complexity.

[0003] Specifically, existing pressure sensitive resistance welding equipment still needs additional operations such as material transfer and alignment after feeding. These intermediate steps not only increase production time but also increase the risk of errors, affecting overall production efficiency. Moreover, due to the lack of automation, these operations largely rely on manual labor, which not only limits batch production capacity and product quality consistency but also increases labor costs. The existing pressure sensitive resistance production equipment has obvious limitations in terms of automation degree, operational simplicity, and production efficiency, which not only affects product consistency and reliability but also limits the competitiveness of enterprises in the fiercely competitive market. Therefore, it is necessary to develop a new production equipment to achieve complete automation of pressure sensitive resistance production, simplify the production process, and improve production efficiency and product quality. SUMMARY

[0004] Therefore, the utility model provides a square MOV pressure sensitive resistance laser welding machine, which makes the feeding, installation, and welding operations of each component of the pressure sensitive resistance completely automated, saving a lot of manual labor and improving production efficiency. In addition, the jig of the welding machine is provided with an upper electrode piece positioning groove, a MOV ceramic piece positioning groove, and a lower electrode piece positioning groove, so that the feeding of each component can be completed in one step, eliminating the intermediate material transfer operation, simplifying the process, and further improving the production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a kind of square MOV pressure sensitive resistor laser welding machine, it includes frame, rotary table device mounted on frame, upper electrode piece feeding mechanism being provided around the rotary table device, first tin paste mechanism, MOV ceramic piece feeding mechanism, second tin paste mechanism, lower electrode piece feeding mechanism, double-sided laser welding mechanism, blowing and sucking mechanism and discharging mechanism, the rotary table device includes drive motor, rotary table being mounted on the shaft end of the drive motor and the multiple fixtures being spacedly distributed on the circumference of rotary table, the fixture is provided with upper electrode piece positioning groove, MOV ceramic piece positioning groove and lower electrode piece positioning groove, and the discharging end of the upper electrode piece feeding mechanism is connected with the upper electrode piece positioning groove;The discharging end of the MOV ceramic piece feeding mechanism is connected with the MOV ceramic piece positioning groove;The discharging end of the lower electrode piece feeding mechanism is connected with the lower electrode piece positioning groove.

[0007] As a preferred scheme: the fixture is provided with feed channel, and the upper electrode piece positioning groove, the MOV ceramic piece positioning groove and the lower electrode piece positioning groove are arranged on the two side walls of the feed channel from bottom to top, and the extension hole communicated with the feed channel is formed at the rear end of the feed channel;Positioning plane corresponding to the lower electrode piece is formed at the rear end of the fixture.

[0008] As a preferred scheme: the discharging mechanism includes hopper and pushing assembly, the hopper is arranged below the rotary table, and the pushing assembly is arranged on the rotary table, the pushing assembly includes pushing cylinder and pushing block mounted on the shaft end of the pushing cylinder, and the pushing block is telescopically matched with the extension hole of the fixture under the driving of the pushing cylinder.

[0009] As a preferred scheme: the upper electrode piece feeding mechanism, the MOV ceramic piece feeding mechanism and the lower electrode piece feeding mechanism respectively include vibration disc and straight vibration feeder connected with the vibration disc, and the tail end of the straight vibration feeder is communicated with the feed channel of the fixture.

[0010] As a preferred scheme: the first tin paste mechanism and the second tin paste mechanism respectively include tin paste support, tin nozzle, tin motor for driving the rotation of the tin nozzle, and tin cylinder for driving the lifting of the tin nozzle, the tin paste support is mounted on the frame and is close to the rotary table;The tin cylinder is mounted on the tin paste support, and support plate is mounted on the shaft end of the tin cylinder;The tin motor is mounted on the support plate, and the tin nozzle is mounted on the output end of the tin motor.

[0011] As a preferred scheme: the output end of the tin motor is movably mounted with arc-shaped adjusting plate for adjusting the angle of the tin nozzle, and arc-shaped hollow groove is arranged on the arc-shaped adjusting plate, and the tin nozzle is slidably mounted in the arc-shaped hollow groove.

[0012] As a preferred scheme: the double-sided laser welding mechanism comprises a welding support, an upper welding device and a lower welding device mounted on the welding support, the upper welding device and the lower welding device are located above and below the turntable and face the jig.

[0013] As a preferred scheme: the upper welding device and the lower welding device are slidably mounted on the welding support, and handles for adjusting the height of the upper welding device and the lower welding device are arranged at the upper end and the lower end of the welding support.

[0014] As a preferred scheme: the turntable rotates clockwise, and the upper electrode sheet feeding mechanism, the first tin paste coating mechanism, the MOV ceramic sheet feeding mechanism, the second tin paste coating mechanism, the lower electrode sheet feeding mechanism, the double-sided laser welding mechanism, the blowing and sucking mechanism and the discharging mechanism are sequentially distributed along the clockwise rotation direction of the turntable.

[0015] As a preferred scheme: the blowing and sucking mechanism comprises a blowing and sucking support and a blowing and sucking pipe mounted on the blowing and sucking support, and the pipe opening of the blowing and sucking pipe faces the jig.

[0016] Compared with the prior art, the utility model has obvious advantages and beneficial effects, specifically, from the above technical scheme, the turntable device, the upper electrode sheet feeding mechanism, the first tin paste coating mechanism, the MOV ceramic sheet feeding mechanism, the second tin paste coating mechanism, the lower electrode sheet feeding mechanism, the double-sided laser welding mechanism, the blowing and sucking mechanism and the discharging mechanism are integrated on the rack to form the welding machine for the pressure sensitive resistor, so that the feeding, installation and welding operation of each component of the pressure sensitive resistor are completely automated, a large amount of manual labor is saved, and the production efficiency is improved; in addition, the jig of the welding machine is provided with the upper electrode sheet positioning groove, the MOV ceramic sheet positioning groove and the lower electrode sheet positioning groove, so that the feeding of each component can be completed in one step, the intermediate material transfer operation is saved, the process is simplified, and the production efficiency is further improved.

[0017] In order to more clearly illustrate the structural features and effects of the utility model, specific embodiments will be described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic view of the welding machine of the utility model;

[0019] Figure 2 It is another perspective three-dimensional schematic view of the welding machine of the utility model;

[0020] Figure 3 It is a top view schematic view of the welding machine of the utility model;

[0021] Figure 4 It is a three-dimensional schematic view of the double-sided laser welding mechanism of the utility model;

[0022] Figure 5 It is the three-dimensional schematic view of the tin paste mechanism of the utility model;

[0023] Figure 6 It is the three-dimensional schematic view of the jig of the utility model with a pressure sensitive resistor;

[0024] Figure 7 It is the three-dimensional schematic view of the jig of the utility model;

[0025] Figure 8 It is the end surface schematic view of the jig of the utility model;

[0026] Figure 9 It is the exploded three-dimensional schematic view of the pressure sensitive resistor of the utility model.

[0027] Explanation of the attached drawings:

[0028] 10, rack; 20, turntable device; 21, driving motor; 22, turntable; 23, jig; 231, upper electrode piece positioning groove; 232, MOV ceramic piece positioning groove; 233, lower electrode piece positioning groove; 234, feeding channel; 235, protruding hole; 236, positioning plane; 30, upper electrode piece feeding mechanism; 40, first tin paste mechanism; 41, tin paste support; 42, tin coating nozzle; 43, tin coating motor; 44, tin coating cylinder; 45, support plate; 46, arc-shaped adjusting plate; 461, arc-shaped hollow groove; 50, MOV ceramic piece feeding mechanism; 60, second tin paste mechanism; 70, lower electrode piece feeding mechanism; 80, double-sided laser welding mechanism; 81, welding support; 82, upper welding device; 83, lower welding device; 84, handle; 90, blowing and sucking mechanism; 91, blowing and sucking support; 92, blowing and sucking pipe; 100, discharging mechanism; 101, hopper; 102, pushing assembly; 1021, pushing cylinder; 1022, pushing block; 110, vibration disc; 120, straight vibration feeder; 130, pressure sensitive resistor; 131, upper electrode piece; 132, MOV ceramic piece; 133, lower electrode piece. DETAILED DESCRIPTION

[0029] The utility model as shown in Figures 1 to 9 A square MOV pressure sensitive resistor laser welding machine, comprising a rack 10, a turntable device 20 mounted on the rack 10, an upper electrode piece feeding mechanism 30, a first tin paste mechanism 40, a MOV ceramic piece feeding mechanism 50, a second tin paste mechanism 60, a lower electrode piece feeding mechanism 70, a double-sided laser welding mechanism 80, a blowing and sucking mechanism 90 and a discharging mechanism 100 arranged around the turntable device 20, wherein:

[0030] The carousel device 20 comprises a driving motor 21, a carousel 22 installed at the shaft end of the driving motor 21, and a plurality of jigs 23 distributed at intervals on the circumference of the carousel 22, wherein the jigs 23 are provided with an upper electrode sheet positioning groove 231, an MOV ceramic sheet positioning groove 232, and a lower electrode sheet positioning groove 233, the discharge end of the upper electrode sheet feeding mechanism 30 is connected with the upper electrode sheet positioning groove 231, the discharge end of the MOV ceramic sheet feeding mechanism 50 is connected with the MOV ceramic sheet positioning groove 232, and the discharge end of the lower electrode sheet feeding mechanism 70 is connected with the lower electrode sheet positioning groove 233. The carousel 22 rotates clockwise, and the upper electrode sheet feeding mechanism 30, the first tin paste coating mechanism 40, the MOV ceramic sheet feeding mechanism 50, the second tin paste coating mechanism 60, the lower electrode sheet feeding mechanism 70, the double-sided laser welding mechanism 80, the blowing and sucking mechanism 90, and the discharge mechanism 100 are sequentially distributed along the clockwise rotation direction of the carousel 22.

[0031] The upper electrode sheet feeding mechanism 30, the MOV ceramic sheet feeding mechanism 50, and the lower electrode sheet feeding mechanism 70 each comprise a vibrating disc 110 and a straight-vibration feeder 120 connected with the vibrating disc 110, and the tail end of the straight-vibration feeder 120 is connected with the feeding passage 234 of the jig 23.

[0032] The jig 23 is provided with a feeding passage 234, the upper electrode sheet positioning groove 231, the MOV ceramic sheet positioning groove 232, and the lower electrode sheet positioning groove 233 are arranged on the two side walls of the feeding passage 234 from bottom to top, and the feeding passage 234 is provided with an extension hole 235 at the rear end thereof, and the jig 23 is provided with a positioning plane 236 corresponding to the feeding passage 234 at the rear end thereof. The arrangement of the upper electrode sheet positioning groove 231, the MOV ceramic sheet positioning groove 232, the lower electrode sheet positioning groove 233, and the positioning plane 236 enables the upper electrode sheet, the MOV ceramic sheet, and the lower electrode sheet to be directly fed into position, thereby saving the intermediate material transfer link, saving the process, and improving the production efficiency.

[0033] The discharge mechanism 100 comprises a material bin 101 and a material pushing assembly 102, the material bin 101 is arranged below the carousel 22, the material pushing assembly 102 is arranged on the carousel 22, the material pushing assembly 102 comprises a material pushing cylinder 1021 and a material pushing block 1022 installed at the shaft end of the material pushing cylinder 1021, the material pushing block 1022 is telescopic and matched with the extension hole 235 of the jig 23 under the driving of the material pushing cylinder 1021, and when the varistor 130 is assembled, the material pushing block 1022 pushes the varistor 130 from the feeding passage 234 to the material bin 101.

[0034] The first and second tin paste coating mechanisms 40 and 60 respectively comprise a tin paste coating support 41, a tin paste coating nozzle 42, a tin paste coating motor 43 for driving the tin paste coating nozzle 42 to rotate, and a tin paste coating cylinder 44 for driving the tin paste coating nozzle 42 to lift. The tin paste coating support 41 is mounted on the rack 10 and close to the turntable 22. Taking the first tin paste coating mechanism 40 as an example, the tin paste coating cylinder 44 is mounted on the tin paste coating support 41, and a support plate 45 is mounted on the shaft end of the tin paste coating cylinder 44. The tin paste coating motor 43 is mounted on the support plate 45, and the tin paste coating nozzle 42 is mounted on the output end of the tin paste coating motor 43. The tin paste coating cylinder 44 drives the tin paste coating motor 43 and the tin paste coating nozzle 42 to lift to adjust the height to adapt to different tin coating height requirements. An arc-shaped adjusting plate 46 for adjusting the angle of the tin paste coating nozzle 42 is movably mounted on the output end of the tin paste coating motor 43. An arc-shaped hollow groove 461 is arranged on the arc-shaped adjusting plate 46, and the tin paste coating nozzle 42 is slidably mounted in the arc-shaped hollow groove 461. By adjusting the position of the tin paste coating nozzle 42 in the arc-shaped hollow groove 461, the angle of the tin paste coating nozzle 42 can be changed to adapt to different tin coating operations.

[0035] The double-sided laser welding mechanism 80 comprises a welding support 81, an upper welding device 82 and a lower welding device 83 mounted on the welding support 81. The upper and lower welding devices 82 and 83 are both laser welders, and are located above and below the turntable 22 and towards the upper and lower sides of the jig 23. The upper and lower welding devices 82 and 83 are vertically slidably mounted on the welding support 81. Handles 84 are arranged on the upper and lower ends of the welding support 81 for adjusting the height of the upper and lower welding devices 82 and 83. Specifically, a screw rod and sliding block mechanism is used to adjust the height of the upper and lower welding devices 82 and 83. The upper and lower welding devices 82 and 83 are mounted on the sliding blocks, and the screw rod is rotated by the handles 84 to drive the sliding blocks to move up and down, so that the upper and lower welding devices 82 and 83 are close to or away from the jig 23.

[0036] The blowing and sucking mechanism 90 comprises a blowing and sucking support 91 and a blowing and sucking pipe 92 mounted on the blowing and sucking support 91. The pipe opening of the blowing and sucking pipe 92 is towards the jig 23. The rear end of the blowing and sucking pipe 92 is connected to a gas pump device to blow and suck dust on the completed varistor 130 to clean the welding slag and dust on the surface of the varistor 130.

[0037] The varistor 130 comprises an upper electrode sheet 131, a MOV ceramic sheet 132 and a lower electrode sheet 133. The MOV ceramic sheet 132 is fixed between the upper and lower electrode sheets by soldering.

[0038] The working process of the welding machine is as follows: the upper electrode piece feeding mechanism 30 feeds the upper electrode piece to the upper electrode piece positioning groove 231 of the jig 23, the rotating disc 22 rotates to rotate the jig 23 with the upper electrode piece to the first solder paste coating mechanism 40 station, the first solder paste coating mechanism 40 coats solder paste on the upper electrode piece. The rotating disc 22 continues to rotate to rotate the upper electrode piece with the solder paste to the MOV ceramic piece feeding mechanism 50 station, the MOV ceramic piece feeding mechanism 50 feeds the MOV ceramic piece to the MOV ceramic piece positioning groove 232 above the solder paste layer; the rotating disc 22 rotates to rotate the jig 23 with the MOV ceramic piece to the second solder paste coating mechanism 60 station, the second solder paste coating mechanism 60 coats solder paste above the MOV ceramic piece. The rotating disc 22 continues to rotate, the jig 23 reaches the lower electrode piece feeding mechanism 70 station, the lower electrode piece feeding mechanism 70 feeds the lower electrode piece to the lower electrode piece positioning groove 233; the rotating disc 22 rotates again to rotate the jig 23 to the double-sided laser welding mechanism 80 station, the double-sided laser welding mechanism 80 performs laser welding on the upper electrode piece, the lower electrode piece and the MOV ceramic piece, so that the three are combined into one to form the pressure sensitive resistor 130. The rotating disc 22 rotates the welded pressure sensitive resistor 130 to the blowing and sucking mechanism 90 to perform blowing and sucking operations, and removes the welding slag and dust on the surface of the pressure sensitive resistor 130; then the rotating disc 22 rotates the pressure sensitive resistor 130 to the discharging mechanism 100 station, the discharging mechanism 100 pushes the pressure sensitive resistor 130 out of the jig 23 and falls into the material bin 101, and the discharging is completed.

[0039] The utility model discloses a design emphasis lies in, through the rotating disc device, upper electrode piece feeding mechanism, first solder paste coating mechanism, MOV ceramic piece feeding mechanism, second solder paste coating mechanism, lower electrode piece feeding mechanism, double-sided laser welding mechanism, blowing and sucking mechanism and discharging mechanism are integrated on the frame and form the welding machine for pressure sensitive resistor, make pressure sensitive resistor's each component feeding, installation and welding operation complete automation, save a lot of manual labor, improve production efficiency, in addition, the jig of this welding machine is equipped with upper electrode piece positioning groove, MOV ceramic piece positioning groove and lower electrode piece positioning groove, so that each component feeding can be in place in one step, save the intermediate transfer material operation, simplify the procedure, further improve production efficiency.

[0040] The above is only the preferred embodiment of the utility model, and does not limit the technical range of the utility model, so any slight modification, equivalent change and modification made according to the technical essence of the utility model to the above embodiment still belongs to the range of the technical scheme of the utility model.

Claims

1. A square MOV varistor laser welding machine, characterized in that: The device includes a frame, a turntable mounted on the frame, and an upper electrode feeding mechanism, a first solder paste application mechanism, an MOV ceramic wafer feeding mechanism, a second solder paste application mechanism, a lower electrode feeding mechanism, a double-sided laser welding mechanism, a blow-suction mechanism, and a discharge mechanism arranged around the turntable. The turntable includes a drive motor, a turntable mounted on the shaft end of the drive motor, and multiple fixtures spaced apart on the circumference of the turntable. Each fixture has an upper electrode positioning groove, an MOV ceramic wafer positioning groove, and a lower electrode positioning groove. The discharge end of the upper electrode feeding mechanism is connected to the upper electrode positioning groove; the discharge end of the MOV ceramic wafer feeding mechanism is connected to the MOV ceramic wafer positioning groove; and the discharge end of the lower electrode feeding mechanism is connected to the lower electrode positioning groove.

2. The square MOV varistor laser welding machine according to claim 1, characterized in that: The fixture is provided with a feeding channel. The upper electrode plate positioning groove, the MOV ceramic plate positioning groove and the lower electrode plate positioning groove are arranged from bottom to top on both sides of the feeding channel. An extension hole communicating with the feeding channel is opened at the rear end of the feeding channel. A positioning plane for positioning the lower electrode plate is formed at the rear end of the fixture corresponding to the feeding channel.

3. The square MOV varistor laser welding machine according to claim 2, characterized in that: The discharge mechanism includes a hopper and a pushing assembly. The hopper is located below the turntable, and the pushing assembly is located on the turntable. The pushing assembly includes a pushing cylinder and a pushing block installed on the shaft end of the pushing cylinder. The pushing block is telescopically coupled to the extension hole of the fixture under the drive of the pushing cylinder.

4. The square MOV varistor laser welding machine according to claim 2, characterized in that: The upper electrode sheet feeding mechanism, the MOV ceramic sheet feeding mechanism, and the lower electrode sheet feeding mechanism each include a vibrating plate and a direct vibration feeder connected to the vibrating plate. The end of the direct vibration feeder is connected to the feed channel of the fixture.

5. The square MOV varistor laser welding machine according to claim 1, characterized in that: The first solder paste application mechanism and the second solder paste application mechanism each include a solder paste application bracket, a solder paste nozzle, a solder paste application motor for driving the solder paste nozzle to rotate, and a solder paste application cylinder for driving the solder paste nozzle to lift and lower. The solder paste application bracket is mounted on the frame and close to the turntable. The solder paste application cylinder is mounted on the solder paste application bracket, and a support plate is mounted on the shaft end of the solder paste application cylinder. The solder paste application motor is mounted on the support plate, and the solder paste nozzle is mounted on the output end of the solder paste application motor.

6. The square MOV varistor laser welding machine according to claim 5, characterized in that: An arc-shaped adjustment plate for adjusting the angle of the soldering nozzle is movably installed on the output end of the soldering motor. An arc-shaped hollow groove is provided on the arc-shaped adjustment plate, and the soldering nozzle is slidably installed in the arc-shaped hollow groove.

7. The square MOV varistor laser welding machine according to claim 1, characterized in that: The double-sided laser welding mechanism includes a welding bracket, an upper welding device and a lower welding device mounted on the welding bracket. The upper welding device and the lower welding device are positioned above and below the turntable, respectively, and face the fixture.

8. The square MOV varistor laser welding machine according to claim 7, characterized in that: The upper welding device and the lower welding device are slidably mounted on the welding bracket, and handles for adjusting the height of the upper welding device and the lower welding device are respectively provided at the upper and lower ends of the welding bracket.

9. The square MOV varistor laser welding machine according to claim 1, characterized in that: The turntable rotates clockwise, and the upper electrode sheet feeding mechanism, the first solder paste application mechanism, the MOV ceramic sheet feeding mechanism, the second solder paste application mechanism, the lower electrode sheet feeding mechanism, the double-sided laser welding mechanism, the blow-suction mechanism, and the discharge mechanism are distributed sequentially along the clockwise rotation direction of the turntable.

10. The square MOV varistor laser welding machine according to claim 1, characterized in that: The blowing and suction mechanism includes a blowing and suction bracket and a blowing and suction tube mounted on the blowing and suction bracket, with the opening of the blowing and suction tube facing the fixture.

Images