CN212705119U

CN212705119U - Spot welding machine with double welding stations

Info

Publication number: CN212705119U
Application number: CN202021522625.1U
Authority: CN
Inventors: 石鉴伟
Original assignee: Zhejiang Shuchuang Technology Co ltd
Current assignee: Zhejiang Shuchuang Technology Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-03-16
Anticipated expiration: 2030-07-28

Abstract

The utility model relates to a spot welder of two welding stations, including the frame, and decollator, rotary disc and the circle that sets up in the frame around the rotary disc is provided with static contact feed mechanism, scaling powder feed mechanism, silver piece detection mechanism, certified products discharge mechanism, substandard product discharge mechanism, the outer fringe annular array of rotary disc is provided with the static contact locating piece, surround in the frame the rotary disc is adjacent to be put first welding mechanism, second welding mechanism; a group of spot welding stations are added to improve the production efficiency by nearly 2 times, the occupied area is only increased by 15%, and the equipment cost is increased by 30%; meanwhile, a visual parameterized design is adopted, and 3-4 ordinary workers are processed by one mechanic to complete workshop production work.

Description

Spot welding machine with double welding stations

Technical Field

The utility model relates to a welding equipment technical field, especially a spot welder of two welding stations.

Background

The demand of low-voltage electrical appliance manufacturing industry for human resources is more and more; and simultaneously, the land resource is a tension factor. The demand for automated spot welding equipment has increased, but single-station automated spot welders have limited problems to solve.

As the demand of labor force in small and medium-sized manufacturing industries is increased, the welding process (such as welding pressure, welding current, welding time, flux and the like) of silver and copper metals has high requirements on skills, and the defects do not exist for achieving the two indexes of welding strength and conductivity, so that limited skilled talents and land resources can be determined to be only used on the blade, and the traditional automatic welding equipment needs a technician to frequently adjust various parameters and depends on the feeling for adjustment. Meanwhile, the traditional single-station automatic welding flux equipment cannot achieve the purpose of reducing labor force at the bottom of production efficiency; and the floor space of the equipment is large.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims at providing a spot welder of two welding stations increases a set of welding station, realizes the duplex position welding.

The embodiment of the utility model provides an in adopt following scheme to realize: the spot welding machine comprises a rack, a divider, a rotary disc, a static contact feeding mechanism, a scaling powder feeding mechanism, a silver sheet detecting mechanism, a qualified product discharging mechanism and a defective product discharging mechanism, wherein the divider and the rotary disc are arranged on the rack, the static contact feeding mechanism, the scaling powder feeding mechanism, the silver sheet detecting mechanism, the qualified product discharging mechanism and the defective product discharging mechanism are arranged around the rotary disc, static contact positioning blocks are arranged on an outer edge annular array of the rotary disc, and a first welding mechanism and a second welding mechanism are arranged on the rack in a manner of; the first welding mechanism comprises a base, the base is fixed on the rack, two guide posts are symmetrically arranged on the front portion of the base in a penetrating mode, a first fixing plate is arranged at the upper ends of the guide posts, a first insulating block is arranged on the first fixing plate, a negative copper block is arranged on the first insulating block, a planar cam is arranged between the two guide posts on the base, a first telescopic cylinder is connected to the rear end of the planar cam, a cylinder body of the first telescopic cylinder is fixed on the base, a roller wheel is arranged below the first fixing plate, and the roller wheel is located on the planar cam;

a door-shaped support frame is fixed at the rear part of the base, a second telescopic cylinder is arranged on the support frame, and a silver sheet positioning assembly is fixed at the front end of a push rod of the second telescopic cylinder;

an n-shaped fixing frame is fixed on the supporting frame, an installation plate is fixed at the top end of the fixing frame, a first synchronous belt wheel is arranged on the mounting plate, a second synchronous belt wheel is arranged at the front part of the mounting plate, the first synchronous belt wheel and the second synchronous belt wheel are driven by a synchronous belt, the first synchronous belt wheel is driven by a servo motor, the second synchronous belt wheel is connected with a ball screw, a screw nut is sleeved on the ball screw and limits rotation, a guide plate is fixed on the upper part of the front surface of the fixed frame, a vertical guide groove is arranged on the front surface of the guide plate, the guide groove is provided with a lifting block, the screw nut is connected with the lifting block, the lower surface of the lifting block is connected with a second insulating block, the lower end of the second insulating block is connected with an anode copper block, and the anode copper block is positioned right above the cathode copper block; two static contact clamping points are arranged on the same static contact positioning block; the second welding mechanism is identical in structure to the first welding mechanism.

In one embodiment of the utility model, the silver sheet positioning component comprises a pair of mounting arms and positioning clamping pieces arranged at the end parts of the mounting arms, and clamping grooves for positioning silver dots are arranged on the positioning clamping pieces; and a clamping cylinder is fixed at the front end of the second telescopic cylinder and is connected with the mounting arm to drive the mounting arm to fold or separate.

The utility model relates to an embodiment, the second telescopic cylinder is fixed the middle part of support frame upper surface, the support frame upper surface is located the left and right sides symmetry of second telescopic cylinder is provided with the slide rail, all be provided with the slider on the slide rail, two be connected with the movable plate between the slider, die clamping cylinder's cylinder body is fixed on the movable plate.

The utility model relates to an embodiment, lead screw nut's lower extreme is connected with the spring, the upper end of elevator with spring coupling, the lower extreme of spring with be provided with pressure sensor between the up end of elevator.

In an embodiment of the present invention, the fixed contact positioning block is provided with eight on the rotary disc.

The utility model discloses an in the embodiment, the plane cam is placed in the direction recess, the direction recess is fixed on the base.

In an embodiment of the present invention, the sectional shape of the plane cam is a right trapezoid, and the bevel edge faces up and contacts with the roller.

In one embodiment of the utility model, the screw nut with wear to be equipped with two guiding axles between the elevator.

The utility model has the advantages that: the utility model provides a spot welder with double welding stations, wherein a divider is driven by a motor to do anticlockwise intermittent rotary motion, so that a working cycle is performed by every 8 (45 degrees/every) intermittent motions of a rotary disc;

firstly, a static contact feeding mechanism grabs static contacts from a left vibration disc and a right vibration disc into static contact positioning blocks on a rotary disc and rotates 45 degrees to a lower station along with the rotary disc; in the point soldering flux mechanism, a soldering flux tube flows into the surface of a workpiece (a static contact welding area) under the action of air pressure (the pressure can be adjusted in a micro-scale mode), and then continuously rotates by 45 degrees to enter a lower station after the completion of the operation; the silver sheet feeding mechanism is used for sucking silver sheets to a workpiece in vacuum and rotating the workpiece by 45 degrees; the silver piece detection mechanism is used for monitoring whether the silver piece is in place or not; when the workpieces rotate to a welding station of the first welding mechanism, firstly, the silver sheet and the static contact are positioned, then, constant pressure (servo motor torque control), current and welding time are respectively applied to weld one of the workpieces, and after the workpieces are rotated by 45 degrees, the workpieces are continuously rotated; the welding station of the second welding mechanism has the same working content as the first welding mechanism but welds another workpiece; then, continuously rotating for 45 degrees until the station where the qualified product unloading mechanism is located takes out the qualified product; and then, the rotating is continued to be 45 degrees until the defective product discharging mechanism takes out the unqualified product (the workpiece without silver sheets in the monitoring process), and the rotating is performed by 360 degrees to finish a working process. A group of spot welding stations are added to improve the production efficiency (the efficiency is improved by nearly 2 times), the occupied area is only increased by 15%, and the equipment cost is increased by 30%; meanwhile, a visual parameterized design is adopted, and 3-4 ordinary workers are processed by one mechanic to complete workshop production work. The factory building area is effectively utilized, so that enterprises can obtain direct positive benefits.

Drawings

Fig. 1 is a schematic view of the mechanism of a spot welder with two welding stations.

Fig. 2 is a top view of a dual welding station spot welder.

Fig. 3 is a partially enlarged schematic view of fig. 2.

Fig. 4 is a schematic structural diagram of a welding mechanism of a spot welder with two welding stations.

Fig. 5 is a schematic structural diagram of a welding mechanism of a spot welder with two welding stations.

Fig. 6 is a partially enlarged schematic view of a welding mechanism of a spot welder with two welding stations.

Fig. 7 is a front view of a welding mechanism of a dual welding station spot welder.

Fig. 8 is a schematic structural view of a fixed contact positioning block.

Fig. 9 is a schematic structural view of a fixed contact and a silver sheet.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1 to 9, the utility model provides a spot welder with two welding stations, which comprises a frame 1, a divider 2 arranged on the frame 1, a rotary disc 3, and a static contact feeding mechanism 4, a soldering flux feeding mechanism 5, a silver sheet feeding mechanism 6, a silver sheet detecting mechanism 7, a qualified product discharging mechanism 11 and a defective product discharging mechanism 12 which are arranged around the rotary disc 3, wherein a static contact positioning block 10 is arranged on the outer edge annular array of the rotary disc 3, and a first welding mechanism 8 and a second welding mechanism 9 are arranged on the frame 1 and are adjacent to each other around the rotary disc 3; the spot welding machine can weld two workpieces at the same time during operation, and two static contacts are placed on the static contact positioning blocks 10 through the static contact feeding mechanism 4; the first welding mechanism 8 is used for welding one static contact, and the other static contact is welded by the second welding mechanism 9 which is brought to the next station through the rotation of the rotary disc 3;

the first welding mechanism 8 comprises a base 81, the base 81 is fixed on the rack 1, two guide posts 825 are symmetrically arranged on the front portion of the base 81 in a left-right penetrating manner, a first fixing plate 826 is arranged at the upper end of each guide post 825, a first insulating block 827 is arranged on each first fixing plate 826, a negative copper block 828 is arranged on each first insulating block 827, a plane cam 821 is arranged between the two guide posts 825 on the base 81, a first telescopic cylinder 824 is connected to the rear end of each plane cam 821, the cylinder body of each first telescopic cylinder 824 is fixed on the base 81, a roller 822 is arranged below each first fixing plate 826, and the roller 822 is arranged on the plane cam 821;

a door-shaped support frame 83 is fixed at the rear part of the base 81, a second telescopic cylinder 881 is arranged on the support frame 83, and a silver sheet positioning component is fixed at the front end of a push rod of the second telescopic cylinder 881;

an n-shaped fixing frame 85 is fixed on the supporting frame 83, a mounting plate 86 is fixed at the top end of the fixing frame 85, a first synchronous pulley 848 is installed on the mounting plate 86, a second synchronous pulley 847 is installed at the front portion of the mounting plate 86, the first synchronous pulley 848 and the second synchronous pulley 847 are driven by a synchronous belt 89, the first synchronous pulley 848 is driven by a servo motor 891, a ball screw 849 is connected with the second synchronous pulley 847, a screw nut 846 is sleeved on the ball screw 849 and limits rotation so as to enable the first synchronous pulley to move up and down along the ball screw, a guide plate 87 is fixed on the upper portion of the front surface of the fixing frame 85, a vertical guide groove 871 is formed in the front surface of the guide plate 87, a lifting block 843 is installed in the guide groove 871, the screw nut 846 is connected with the lifting block 843, a second insulating block 842 is connected with the lower surface of the lifting block 843, the lower end of the second insulating block 842 is connected with a positive copper block 841, and the positive copper block 841 is positioned right above the negative copper block 828; two conical convex static contact clamping points 101 are arranged on the same static contact positioning block 10, and because one end of a static contact is just opened with a hole and the static contact clamping point is of a structure with a large upper part and a small lower part, the static contact clamping point can be just fixed by penetrating the opened end of the static contact into the hole, and the static contact positioning block is used for placing two static contacts so as to be beneficial to realizing the spot welding of the two static contacts; the second welding mechanism 9 has the same structure as the first welding mechanism 8; the up-and-down movement of the positive copper block 841 and the negative copper block 828 is realized without mutual interference, so that the simple and stable structure action is ensured, the debugging is convenient, and the possibility of failure is reduced.

Referring to fig. 1, 4 to 7, in an embodiment of the present invention, the silver sheet positioning assembly includes a pair of mounting arms 886 and positioning clips 887 disposed at the end portions of the mounting arms 886, wherein the positioning clips 887 are provided with clamping grooves 888 for positioning silver dots; a clamping cylinder 882 is fixed at the front end of the second telescopic cylinder 881, and the clamping cylinder 882 is connected with a mounting arm 886 to drive the mounting arm to close or separate; the silver sheet is well limited from two sides through the clamping groove 888 on the end positioning clamping piece 887, and the method is simple and reliable; the silver sheet positioning assembly is controlled to move back and forth and be folded and separated through the two groups of cylinders, the structure is simplified, the mutual interference of debugging is avoided, the possibility of simultaneous occurrence of faults is reduced, and the silver sheet positioning assembly is convenient for workers to debug and monitor.

Referring to fig. 4 to 7, in an embodiment of the present invention, the second telescopic cylinder 881 is fixed in the middle of the upper surface of the supporting frame 83, slide rails 883 are symmetrically disposed on the upper surface of the supporting frame on the left and right sides of the second telescopic cylinder 881, sliders 884 are disposed on the slide rails 883, a moving plate 885 is connected between the two sliders 884, and the cylinder body of the clamping cylinder 882 is fixed on the moving plate 885; the deformation of the push rod when the second telescopic cylinder is pushed out is reduced, so that the silver sheet is more accurately positioned.

Referring to fig. 4 to 7, in an embodiment of the present invention, a spring 845 is connected to a lower end of the screw nut 846, an upper end of the lifting block 843 is connected to the spring 845, and a pressure sensor 844 is disposed between a lower end of the spring 845 and an upper end surface of the lifting block 843; after the servo motor 891 drives the positive copper block 841 to move to the position of the silver sheet, the servo motor 891 continues to work and compresses the spring 845, and when the pressure sensor 844 detects that the pressure is greater than a set value, the servo motor 891 stops working. The silver sheet is fragile relative to the workpiece, and if the pressure of the positive electrode copper block 841 is too large, the silver sheet is easily crushed, so that the product has defects and even is scrapped; consequently set up spring 845 and pressure sensor 844 complex structure, effectual control positive pole copper billet 841 descends whether stable, has exerted too big pressure to the silver piece, and spring 845 plays the effect of buffering, and pressure sensor 844 can in time feedback information stop servo motor 891, has guaranteed the quality improvement production efficiency of product, reduces the rejection rate, reduce cost.

Referring to fig. 1 to 2, in an embodiment of the present invention, eight fixed contact positioning blocks 10 are disposed on the rotary disc 3; the maximum production efficiency is guaranteed corresponding to eight working stations, and one working procedure is completed by each station where the mechanism is located.

Referring to fig. 4, 5 and 7, in an embodiment of the present invention, the plane cam 821 is disposed in a guide groove, and the guide groove 823 is fixed on the base 81; the guide and limiting functions are achieved, and accurate movement is achieved.

Referring to fig. 4 to 7, in an embodiment of the present invention, two guide shafts 840 are inserted between the screw nut 846 and the lifting block 843; the guide shaft is non-fixedly connected with the screw nut and the lifting block, and is used for limiting the rotation of the screw nut 846 and guiding the screw nut, so that the screw nut can move up and down along the ball screw 849 along with the rotation of the ball screw 849 to press the spring, and the spring presses the lifting plate to move, so that the positive copper block 841 is driven to move up and down to contact a tool to be welded.

Referring to fig. 4 to 7, in an embodiment of the present invention, the sectional shape of the plane cam 821 is a right trapezoid, and the inclined edge faces upward to contact with the roller 822; the plane cam 821 is pushed to move back and forth through the first telescopic cylinder 824, and the roller 822 moves along the upper surface of the plane cam 821, so that the vertical movement is realized, and the negative copper block 828 is driven to be close to or far away from the welded static contact.

The utility model discloses the theory of operation below has:

the divider 2 is driven by the motor to make anticlockwise intermittent rotary motion, so that the rotary disc 3 makes a working cycle through intermittent motion every 8 times (45 degrees/time); firstly, a static contact feeding mechanism 4 grabs a static contact from a left vibration disc and a right vibration disc into a static contact positioning block 10 on a rotary disc 3 and rotates 45 degrees along with the rotary disc 3 to a lower station; in the point soldering flux mechanism, a soldering flux tube flows into the surface of a workpiece (a static contact welding area) under the action of air pressure (the pressure can be adjusted in a micro-scale mode), and then continuously rotates by 45 degrees to enter a lower station after the completion of the operation; the silver sheet feeding mechanism 6 is used for sucking the silver sheets to a workpiece in vacuum and rotating the workpiece by 45 degrees; the silver piece detection mechanism 7 is used for monitoring whether the silver piece is in place; when a workpiece rotates to a welding station of a first welding mechanism 8, firstly, a silver sheet 14 and a fixed contact are positioned, then, constant pressure (torque control of a servo motor 891), current and welding time are respectively applied to weld one workpiece (1, after the workpiece is sent by a rotary disc 3, a plane cam 821 moves downwards under the action of an air cylinder to jack a negative copper block 828 to move upwards to be contacted with the workpiece (a fixed contact 13), 2, a positioning finger correctly positions the silver sheet under the action of the air cylinder, 3, after the silver sheet and the fixed contact are positioned, the servo motor 891 sequentially drives a synchronous pulley to rotate, a ball screw and a positive copper block 841 to move downwards and press the silver sheet until a feedback signal motor of a pressure sensor 844 stops moving, 4, a silver sheet positioning component withdraws and returns to an original position under the action of the air cylinder, 5, power-on welding is completed, 6, the positive copper slug 841 moves upward under the action of the servomotor 891 to return to the original position, and the negative copper slug 828 moves downward under the action of gravity and the spring 845 to the original position, completing the whole welding construction. ) After finishing, continuing to rotate by 45 degrees; the welding station of the second welding mechanism 9 has the same work content as the first welding mechanism 8 but welds another workpiece; then, continuously rotating for 45 degrees until the station where the qualified product unloading mechanism 11 is located takes out the qualified product; and then, the rotating is continued to be 45 degrees until the defective product discharging mechanism 12 takes out the unqualified products (workpieces without silver sheets in monitoring), and the rotating is performed by 360 degrees in total to finish a working process.

The above description is only for the preferred embodiment of the present invention, and should not be interpreted as limiting the scope of the present invention, which is intended to cover all the equivalent changes and modifications made in accordance with the claims of the present invention.

Claims

1. The utility model provides a spot welder of two welding stations, includes the frame to and set up decollator, the rotary disk in the frame and encircle the rotary disk is provided with static contact feed mechanism, scaling powder feed mechanism, silver piece detection mechanism, certified products discharge mechanism, substandard product discharge mechanism, the outer fringe annular array of rotary disk is provided with static contact locating piece, its characterized in that: a first welding mechanism and a second welding mechanism are adjacently arranged on the rack around the rotary disc; the first welding mechanism comprises a base, the base is fixed on the rack, two guide posts are symmetrically arranged on the front portion of the base in a penetrating mode, a first fixing plate is arranged at the upper ends of the guide posts, a first insulating block is arranged on the first fixing plate, a negative copper block is arranged on the first insulating block, a planar cam is arranged between the two guide posts on the base, a first telescopic cylinder is connected to the rear end of the planar cam, a cylinder body of the first telescopic cylinder is fixed on the base, a roller wheel is arranged below the first fixing plate, and the roller wheel is located on the planar cam;

an n-shaped fixing frame is fixed on the supporting frame, an installation plate is fixed at the top end of the fixing frame, a first synchronous belt wheel is arranged on the mounting plate, a second synchronous belt wheel is arranged at the front part of the mounting plate, the first synchronous belt wheel and the second synchronous belt wheel are driven by a synchronous belt, the first synchronous belt wheel is driven by a servo motor, the second synchronous belt wheel is connected with a ball screw, a screw nut is sleeved on the ball screw and limits rotation, a guide plate is fixed on the upper part of the front surface of the fixed frame, a vertical guide groove is arranged on the front surface of the guide plate, the guide groove is provided with a lifting block, the screw nut is connected with the lifting block, the lower surface of the lifting block is connected with a second insulating block, an anode copper block is fixed at the lower end of the second insulating block and is positioned right above the cathode copper block; two conical convex static contact clamping points are arranged on the static contact positioning block; the second welding mechanism is identical in structure to the first welding mechanism.

2. A dual weld station spot welder according to claim 1, wherein: the silver sheet positioning assembly comprises mounting arms arranged in pairs and positioning clamping pieces arranged at the end parts of the mounting arms, and clamping grooves for positioning silver points are formed in the positioning clamping pieces; and a clamping cylinder is fixed at the front end of the second telescopic cylinder and is connected with the mounting arm to drive the mounting arm to fold or separate.

3. A dual weld station spot welder according to claim 2, wherein: the second telescopic cylinder is fixed in the middle of the upper surface of the support frame, the upper surface of the support frame is located slide rails are symmetrically arranged on the left side and the right side of the second telescopic cylinder, slide blocks are arranged on the two slide rails, a movable plate is connected between the two slide blocks, and a cylinder body of the clamping cylinder is fixed on the movable plate.

4. A dual weld station spot welder according to claim 1, wherein: the lower end of the screw nut is connected with a spring, the upper end of the lifting block is connected with the spring, and a pressure sensor is arranged between the lower end of the spring and the upper end face of the lifting block.

5. A dual weld station spot welder according to claim 1, wherein: and eight fixed contact positioning blocks are arranged on the rotary disc.

6. A dual weld station spot welder according to claim 1, wherein: the plane cam is placed in the guide groove, and the guide groove is fixed on the base.

7. A dual weld station spot welder according to claim 1, wherein: two guide shafts penetrate between the screw nut and the lifting block.

8. A dual weld station spot welder according to claim 1, wherein: the section of the plane cam is in a right trapezoid shape, and the bevel edge faces upwards and is in contact with the roller.