Floating type welding device for fixed spot welding machine

Abstract

The invention belongs to the technical field of welding, and relates to a floating type welding device for a fixed spot welder, which is characterized by comprising a mounting bottom plate, an integral gun body mechanism and a floating mechanism, the integral gun body mechanism is fixedly mounted at one end of the mounting bottom plate, and the floating mechanism is mounted at the other end of the mounting bottom plate in an up-down floating manner; a limiting pin is installed on an air cylinder rod of the whole gun body mechanism, and the limiting pin is limited on a limiting check block arranged on the floating mechanism when descending. According to the floating type welding device for the fixed spot welding machine, through cooperation of the whole gun body mechanism and the floating mechanism, the purpose that the approaching distance is adjustable when the movable electrode and the static electrode work is achieved, a fixed welding gun can automatically compensate the grinding distance after the electrodes are ground, the movable electrode and the static electrode are made to be tightly attached to a plate, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of welding and relates to a floating welding device, in particular to a floating welding device used for fixing a spot welding machine. Background Art

[0002] At present, the field of spot welding technology is mainly divided into suspended spot welding (integrated welding gun, split welding gun), robot spot welding (robot servo welding gun, robot pneumatic welding gun) and fixed spot welding. Suspension spot welding requires a large number of workers to operate the welding gun, and the welding posture is relatively simple, and it is difficult to weld many complex spots. Robot spot welding has higher flexibility and fewer restrictions on welding posture. However, the initial investment is large, and it is necessary to purchase robots and systematically design welding workstations. The fixed spot welding structure is relatively simple, and it does not require worker operation or the purchase of robots. Although the flexibility is slightly lower than that of robot spot welding, it can be compatible with many welds that are difficult to complete with manual suspended spot welding, and it has great efficiency advantages when dealing with large quantities of parts. Multiple fixed welding guns can also be used in parallel to complete multiple welds at one time.

[0003] During welding production, the position of the plate is determined by the fixture, and the position generally does not change. However, the electrode cap will be shorter than before after grinding, creating a distance between the plate and the plate. Welding requires the electrode to be close to the plate, which requires moving the welding gun.

[0004] Suspension spot welding relies on manual operation of the welding gun electrode to hold the plate, robot spot welding relies on automatic compensation by the robot, and fixed spot welding requires the design of a special floating device to compensate for the distance between the electrode cap and the plate after grinding.

[0005] In view of this, it is very necessary to design a floating welding device with adjustable floating range and force to adapt to a variety of fixed welding guns. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a floating welding device for fixing a spot welding machine which has an adjustable floating range and force and is easy to implement.

[0007] The present invention solves the technical problem by adopting the following technical solutions:

[0008] A floating welding device for fixing a spot welding machine is characterized in that it includes a mounting base plate, an integral gun body mechanism and a floating mechanism, wherein the integral gun body mechanism is fixedly mounted on one end of the mounting base plate, and the floating mechanism is mounted up and down in a floating manner on the other end of the mounting base plate, and a limit pin is installed on the cylinder rod of the integral gun body mechanism, and when the limit pin descends, it is limited on a limit block placed on the floating mechanism.

[0009] Moreover, the integral gun body mechanism includes a moving electrode mounting unit and a stationary electrode mounting unit, the moving electrode mounting unit includes a cylinder, a moving electrode and a limit pin, the cylinder is mounted on the mounting base plate, the moving electrode is mounted on the cylinder rod of the cylinder, and the limit pin crosses at the lower position of the cylinder rod;

[0010] The static electrode mounting unit includes an L-shaped mounting plate, a static electrode mounting frame and a static electrode. A mounting block is fixedly installed on the upper end surface of the cylinder. The cylinder rod of the cylinder is retracted in the mounting block. L-shaped mounting plates are relatively installed on the inner and outer sides of the mounting block. The static electrode is installed on the upper end of the vertical part of the L-shaped mounting plate through the static electrode mounting frame. The static electrode is arranged opposite to the moving electrode.

[0011] Moreover, the floating mechanism includes a base, a guide rod, a limit rod, a limit stop block, an adjusting bolt, a spring sleeve rod, a spring and a supporting block. A vertically arranged guide rod is fixedly installed at the other end of the mounting base plate, and the upper part of the guide rod is connected between the two L-shaped mounting plates through a connecting block. The base is installed on the guide rod, and a limit rod is installed on the base at one end of the guide rod. A horizontally arranged limit stop block is installed on the top of the limit rod. The limit stop block is placed on the lower end of the limit pin, and an adjusting bolt installed on the base is top-connected at the bottom of the limit rod. A spring sleeve rod is installed on the base at the other end of the guide rod, and a spring is sleeved on the upper end of the base on the spring sleeve rod. A compression nut is threadedly connected to the spring sleeve rod at the upper end of the spring, and a supporting block is installed on the compression nut, and the supporting block is supported on the lower ends of the two L-shaped mounting plates.

[0012] Furthermore, an insulating plate is provided at a side end of the base.

[0013] Moreover, a vertical mounting groove is opened at the side end of the base, and a pressure plate is installed on the outside of the mounting groove by screws. The limit rod moves in the space formed by the upper mounting groove and the pressure plate, and an adjustment bolt is installed at the bottom of the mounting groove, and the adjustment bolt is threadedly connected to the internal thread made at the bottom of the limit rod.

[0014] Furthermore, it also includes a limiting stud, which is threadedly installed on the bottom mounting plate of the base.

[0015] The advantages and positive effects of the present invention are:

[0016] The floating welding device for a fixed spot welding machine achieves the purpose of adjustable proximity distance between the moving and static electrodes during operation through the cooperation of the overall gun body mechanism and the floating mechanism, so that the fixed welding gun can automatically compensate for the grinding distance after the electrode is ground, so that the moving and static electrodes are close to the plate to ensure the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 A three-dimensional diagram of the present invention omitting one side of the L-shaped mounting plate;

[0019] Figure 3 It is a structural schematic diagram of the overall gun body mechanism of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the floating mechanism of the present invention;

[0021] Figure 5 The present invention is a structural schematic diagram illustrating the assembly of the adjusting bolt and the limiting rod.

[0022] Description of Reference Numerals

[0023] 1-mounting base plate, 2-limiting stud, 3-guide rod, 4-base, 5-insulating plate, 6-spring, 7-spring sleeve rod, 8-L-shaped mounting plate, 9-adjusting bolt, 10-pressure plate, 11-limiting rod, 12-limiting block, 13-moving electrode, 14-static electrode, 15-crimping nut, 16 supporting block, 17-connecting block, 18-limiting pin, 19-mounting block, 20-cylinder, 21-static electrode mounting frame, 22-limiting round table. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0025] Traditional floating structures are mostly pneumatic, that is, a cylinder is used to lift the welding gun to hold the plate to be welded. This compensation method requires not only the purchase of cylinders, but also the design of a separate gas line, which is complex in structure. At the same time, a proportional valve must be added to separately adjust the pressure of the floating cylinder. In view of this, the floating welding device for a fixed spot welder is designed to achieve the purpose of automatically compensating the grinding distance of the fixed welding gun after the electrode is ground, so that the electrode is close to the plate. The specific technical solution is:

[0026] A floating welding device for fixing a spot welding machine, the innovation of which lies in: comprising a mounting base plate 1, an integral gun body mechanism and a floating mechanism, wherein the integral gun body mechanism is fixedly mounted at one end of the mounting base plate, and the floating mechanism is installed up and down at the other end of the mounting base plate, the floating mechanism has a simple structure, and the integral gun body mechanism can be made into a variety of styles, and a standard mounting hole position can be reserved for connection with the floating mechanism, so the floating mechanism can be suitable for a variety of fixed welding guns.

[0027] In this embodiment, the integral gun body mechanism includes a moving electrode mounting unit and a stationary electrode mounting unit, and the moving electrode mounting unit includes a cylinder 20, a moving electrode 13 and a limit pin 18. The cylinder is mounted on the mounting base plate, and the moving electrode is mounted on the cylinder rod of the cylinder, and the limit pin crosses the lower position of the cylinder rod;

[0028] The static electrode mounting unit includes an L-shaped mounting plate 8, a static electrode mounting frame 21 and a static electrode 14. A mounting block 19 is fixedly installed on the upper end surface of the cylinder. The cylinder rod of the cylinder is retracted in the mounting block. L-shaped mounting plates are relatively installed on the inner and outer sides of the mounting block. A static electrode is installed on the upper end of the vertical part of the L-shaped mounting plate through the static electrode mounting frame. The static electrode is arranged opposite to the moving electrode.

[0029] The floating mechanism comprises a base 4, a guide rod 3, a limit stud 2, a limit rod 11, a limit block 12, an adjusting bolt 9, a spring sleeve rod 7, a spring 6 and a supporting block 16. A vertically arranged guide rod is fixedly installed at the other end of the mounting base plate, and the upper part of the guide rod is connected between the two L-shaped mounting plates through a connecting block 17. The base is installed on the guide rod, and a limit rod is installed on the base at one end of the guide rod. A horizontally arranged limit block is installed on the top of the limit rod, and the limit block is placed at the lower end of the limit pin. An adjusting bolt installed on the base is top-connected at the bottom of the limit rod. A spring sleeve rod is installed on the base at the other end of the guide rod, and a spring is sleeved on the upper end of the base on the spring sleeve rod. A compression nut 15 is threadedly connected to the spring sleeve rod at the upper end of the spring, and a supporting block is installed on the compression nut. The supporting block is a convex structure, and the two ends of the convex structure are supported on the lower ends of the two L-shaped mounting plates. An insulating plate 5 is arranged at the side end of the base. A limiting stud is threadedly installed on the bottom mounting plate of the base.

[0030] The stroke of the upper limit pin on the cylinder rod is limited by the limit block on the limit rod, and the position of the limit block is adjusted by the adjustment bolt connected to the limit rod; the limit stud serves the purpose of limiting the position of the base on the guide rod.

[0031] When the cylinder rod of the overall gun body mechanism retracts, the moving electrode moves downward, and the limit pin is limited on the limit block, the cylinder rod continues to retract, thereby driving the mounting base plate to lift up. At this time, the static electrode mounting unit connected to the mounting base plate through the guide rod moves up, and the limit rod moves in the base to realize the upward movement of the static electrode, completing the relative movement of the moving and static electrodes;

[0032] When the cylinder rod of the overall gun body mechanism extends, the moving electrode moves upward, and the limit pin releases the limit to move the mounting base plate downward, thereby moving the static electrode mounting unit connected to the mounting base plate through the guide rod downward, realizing the downward movement of the static electrode and completing the relative approach of the moving and static electrodes. At this time, welding operations can be carried out.

[0033] A vertical mounting groove is provided at the side end of the base, and a pressure plate 10 is installed on the outside of the mounting groove by screws. The limit rod moves in the space formed by the upper mounting groove and the pressure plate, and an adjustment bolt is installed at the bottom of the mounting groove, and the adjustment bolt is threadedly connected with the internal thread formed at the bottom of the limit rod. A circle of limit round table 22 is provided on the adjustment bolt, and the limit round table is limited on the mounting table set vertically to the mounting groove.

[0034] During assembly: Install the integral gun body mechanism and floating mechanism on the mounting plate.

[0035] The guide rod is fixedly connected to the mounting base plate, and the guide rod is installed in the middle of the base through the oil seal and graphite bushing 17;

[0036] The spring sleeve rod passes through the hole on the base and presses against the static electrode mounting unit of the integral gun body mechanism;

[0037] The spring is sleeved on the spring sleeve rod, which has threads. The compression amount of the spring can be adjusted by the position of the crimping nut at the upper end;

[0038] The limit rod is installed in a rectangular installation groove opened on the base, and the opening of the installation groove is fixed with a pressure plate to prevent the limit rod from falling out;

[0039] The adjusting bolt is connected to the base through the mounting groove, and the opening of the mounting groove is fixed with a pressing plate to prevent the adjusting bolt from falling out;

[0040] The limit stopper is fixed to the limit rod by means of a slot and a bolt.

[0041] When working:

[0042] Install the base on the guide rod of the installation base plate. The insulation plate can ensure that the welding gun is insulated from the outside world. The installation bolts are used in conjunction with the insulation plate to avoid leakage. During welding, the cylinder rod extends out, and the moving electrode presses against the plate. Because the plate does not move, the cylinder rod will cause the entire gun body to move downward. At this time, the fixed electrode presses against the plate, and the electrodes at both ends are pressed tightly and energized for welding;

[0043] When the cylinder rod retracts, the limit pin will press the limit block. After pressing, because the limit block does not move, the entire gun body mechanism will lift up. At this time, the static electrode will also lift up and leave the plate.

[0044] On the one hand, by adjusting the height of the adjusting bolt, the limit rod and the limit stop block, the distance between the two electrodes and the plate can be adjusted and the plate can be adjusted to a suitable position; on the other hand, adjusting the crimping nut on the spring sleeve rod can adjust the tension of the spring to balance the gravity of the overall gun body mechanism; the limit stud can adjust the relative minimum position of the base and the mounting base, thereby adjusting the relative minimum position of the static electrode and the plate.

[0045] When in use, the relative positions of the moving and static electrodes and the plate are adjusted to a suitable distance by adjusting the limit studs and the adjusting bolts, and then the device can be used.

[0046] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A floating welding device for a fixed spot welding machine, characterized in that: The utility model comprises a mounting base plate, an integral gun body mechanism and a floating mechanism. The integral gun body mechanism is fixedly mounted on one end of the mounting base plate, and the floating mechanism is installed up and down floatingly on the other end of the mounting base plate. A limit pin is installed on the cylinder rod of the integral gun body mechanism. When the limit pin descends, it is limited on a limit block disposed on the floating mechanism.

2. A floating welding device for a fixed spot welding machine according to claim 1, characterized in that: The integral gun body mechanism comprises a moving electrode mounting unit and a stationary electrode mounting unit, wherein the moving electrode mounting unit comprises a cylinder, a moving electrode and a limit pin, wherein the cylinder is mounted on the mounting base plate, the moving electrode is mounted on the cylinder rod of the cylinder, and the limit pin crosses the lower position of the cylinder rod; The static electrode mounting unit includes an L-shaped mounting plate, a static electrode mounting frame and a static electrode. A mounting block is fixedly installed on the upper end surface of the cylinder. The cylinder rod of the cylinder is retracted in the mounting block. L-shaped mounting plates are relatively installed on the inner and outer sides of the mounting block. The static electrode is installed on the upper end of the vertical part of the L-shaped mounting plate through the static electrode mounting frame. The static electrode is arranged opposite to the moving electrode.

3. A floating welding device for a fixed spot welding machine according to claim 2, characterized in that: The floating mechanism comprises a base, a guide rod, a limit rod, a limit stop block, an adjusting bolt, a spring sleeve rod, a spring and a supporting block. A vertically arranged guide rod is fixedly installed at the other end of the mounting base plate, and the upper part of the guide rod is connected between the two L-shaped mounting plates through a connecting block. The base is installed on the guide rod, and a limit rod is installed on the base at one end of the guide rod. A horizontally arranged limit stop block is installed on the top of the limit rod. The limit stop block is placed on the lower end of the limit pin, and an adjusting bolt installed on the base is top-connected to the bottom of the limit rod. A spring sleeve rod is installed on the base at the other end of the guide rod, and a spring is sleeved on the upper end of the base on the spring sleeve rod. A compression nut is threadedly connected to the spring sleeve rod at the upper end of the spring, and a supporting block is installed on the compression nut, and the supporting block is supported on the lower ends of the two L-shaped mounting plates.

4. A floating welding device for a fixed spot welding machine according to claim 3, characterized in that: An insulating plate is arranged at a side end of the base.

5. A floating welding device for a fixed spot welding machine according to claim 3, characterized in that: A vertical mounting groove is opened at the side end of the base, and a pressure plate is installed on the outside of the mounting groove by screws. The limit rod moves in the space formed by the upper mounting groove and the pressure plate. An adjustment bolt is installed at the bottom of the mounting groove, and the adjustment bolt is threadedly connected to the internal thread formed at the bottom of the limit rod.

6. A floating welding device for a fixed spot welding machine according to claim 3, characterized in that: It also includes a limiting stud, which is threadedly installed on the bottom mounting plate of the base.

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