A floating welding device for a spot welder

Abstract

The present application belongs to the field of welding technology, and relates to a floating welding device for fixing a spot welding machine, characterized in that the device comprises a mounting base plate, an integral gun body mechanism and a floating mechanism, the integral gun body mechanism is fixed at one end of the mounting base plate, the floating mechanism is installed on the other end of the mounting base plate in an up-and-down floating manner, a limiting pin is installed on a cylinder rod of the integral gun body mechanism, and the limiting pin is limited on a limiting block arranged on the floating mechanism when the limiting pin is lowered. The floating welding device for fixing the spot welding machine realizes the purpose of adjustable close distance of the moving and static electrodes during work through cooperation of the integral gun body mechanism and the floating mechanism, enables the fixed welding gun to automatically compensate the grinding distance after electrode grinding, enables the moving and static electrodes to be close to the plate, and guarantees the welding quality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of welding, and relates to a floating type welding device, in particular to a floating type welding device for a fixed spot welding machine. BACKGROUND

[0002] At present, the spot welding technical field 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. Suspended spot welding needs a large number of workers to operate the welding gun, and the welding posture is relatively single, and many complex spot welding is difficult. Robot spot welding has high flexibility, and the welding posture is less limited. However, the initial investment is large, and a robot needs to be purchased, and a welding workstation needs to be designed. Although the flexibility is slightly lower than that of robot spot welding, it can be compatible with many welding points that cannot be completed by manual suspended spot welding, and has a great efficiency advantage when dealing with large quantities of parts, and multiple fixed welding guns can be used in parallel, and multiple welding points can be welded at one time.

[0003] In the welding production, the position of the plate is positioned by the tooling fixture, and the position generally does not change. After the electrode cap is ground, the distance between the plate and the electrode cap is larger than before. The electrode needs to be close to the plate during welding, which requires the welding gun to be moved.

[0004] The suspended spot welding relies on manual operation of the welding gun electrode to press against the plate, the robot spot welding relies on the robot to automatically compensate, and the fixed spot welding needs to design a special floating device to compensate for the distance between the ground electrode cap and the plate.

[0005] Therefore, it is necessary to design a floating type welding device with adjustable floating range and force to adapt to various fixed welding guns. SUMMARY

[0006] The present application aims to overcome the shortcomings of the prior art and provide a floating type welding device for a fixed spot welding machine, which has adjustable floating range and force and is easy to implement.

[0007] The present application solves the technical problem by adopting the following technical scheme:

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

[0009] Moreover, the whole gun body mechanism comprises a moving electrode mounting unit and a static electrode mounting unit, the moving electrode mounting unit comprises a cylinder, a moving electrode and a limiting pin, the cylinder is mounted on the mounting base, the cylinder rod of the cylinder is provided with the moving electrode, and the limiting pin is transversely arranged at the lower position of the cylinder rod;

[0010] The static electrode mounting unit comprises L-shaped mounting plates, a static electrode mounting frame and a static electrode, the mounting block is fixed on the upper end surface of the cylinder, the cylinder rod of the cylinder is telescoped in the mounting block, the L-shaped mounting plates are arranged on the inner and outer sides of the mounting block, and the static electrode is mounted on the upper end of the vertical part of the L-shaped mounting plate through the static electrode mounting frame.

[0011] Moreover, the floating mechanism comprises a base, a guide rod, a limiting rod, a limiting block, an adjusting bolt, a spring sleeve rod, a spring and a supporting block, the guide rod is vertically arranged on the other end of the mounting base, the upper part of the guide rod is connected between the two L-shaped mounting plates through a connecting block, the base is arranged on the guide rod, the limiting rod is arranged on the base at one end of the guide rod, the limiting block is horizontally arranged on the top of the limiting rod and is arranged below the lower end of the limiting pin, the adjusting bolt is arranged on the bottom of the limiting rod and is arranged on the base, the spring sleeve rod is arranged on the base at the other end of the guide rod, the spring is sleeved on the upper end of the base of the spring sleeve rod, the pressure nut is threadedly connected on the upper end of the spring sleeve rod, and the supporting block is arranged on the pressure nut and is arranged on the lower ends of the two L-shaped mounting plates.

[0012] Moreover, the insulating plate is arranged on the side end of the base.

[0013] Moreover, the vertical mounting groove is formed in the side end of the base, the pressing plate is arranged on the outer side of the mounting groove through screws, the limiting rod moves in the space formed by the upper part of the mounting groove and the pressing plate, and the adjusting bolt is arranged on the bottom of the mounting groove and is threadedly connected with the internal thread formed on the bottom of the limiting rod.

[0014] Moreover, the limiting stud is arranged on the bottom of the base.

[0015] The advantages and positive effects of the present application are as follows:

[0016] The floating welding device for the fixed spot welding machine realizes the purpose of adjusting the approaching distance of the moving and static electrodes during work through the cooperation of the whole gun body mechanism and the floating mechanism, the fixed welding gun can automatically compensate the grinding distance after the electrodes are ground, the moving and static electrodes are close to the plate, and the welding quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The figure is a structural schematic diagram of the present application.

[0018] Figure 2 The perspective view of omitting one side L-shaped mounting plate for the application;

[0019] Figure 3 The structural schematic view of the whole gun body mechanism for the application;

[0020] Figure 4 The structural schematic view of the floating mechanism for the application;

[0021] Figure 5 The structural schematic view of the adjusting bolt and the limiting rod assembly for the application.

[0022] Explanation of reference signs

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

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

[0025] The traditional floating structure is mostly pneumatic type, that is, the air cylinder is used to lift the welding gun and press against the plate to be welded. This compensation method not only needs to purchase the air cylinder, but also needs to separately design the air circuit, which is complex in structure. Meanwhile, a proportional valve is also needed to separately adjust the pressure of the floating air cylinder. In view of this, the floating welding device for the fixed spot welding machine is designed to realize the purpose of automatically compensating for the grinding distance after the electrode is ground and allowing the electrode to be close to the plate. The specific technical scheme is as follows:

[0026] The floating welding device for the fixed spot welding machine has the following innovative points: the device comprises a mounting bottom plate 1, a whole gun body mechanism and a floating mechanism, the whole gun body mechanism is fixed on one end of the mounting bottom plate, and the floating mechanism is installed on the other end of the mounting bottom plate in an up-and-down floating manner. The floating mechanism is simple in structure, the whole gun body mechanism can be made into various styles, and standard mounting hole positions are left to be connected with the floating mechanism, so the floating mechanism can be applied to various fixed welding guns.

[0027] In the embodiment, the whole gun body mechanism comprises a moving electrode mounting unit and a static electrode mounting unit, the moving electrode mounting unit comprises an air cylinder 20, a moving electrode 13 and a limiting pin 18, the air cylinder is installed on the mounting bottom plate, the cylinder rod of the air cylinder is installed with the moving electrode, and the limiting pin is transversely arranged at the lower position of the cylinder rod;

[0028] The static electrode mounting unit comprises an L-shaped mounting plate 8, a static electrode mounting frame 21 and a static electrode 14, an installation block 19 is fixed on the upper end surface of the cylinder, the cylinder rod is telescoped in the installation block, the L-shaped mounting plates are oppositely arranged on the inner and outer sides of the installation block, and the static electrode is mounted on the upper end of the vertical part of the L-shaped mounting plate through the static electrode mounting frame.

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

[0030] The stroke of the limiting pin on the cylinder rod is limited by the limiting block on the limiting rod, the position of the limiting block is adjusted by the adjusting bolt abutting on the limiting rod, and the limiting stud limits the position of the base on the guide rod.

[0031] When the cylinder rod of the overall gun body mechanism is retracted, the moving electrode moves downward, the limiting pin is limited on the limiting 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 with the mounting base plate through the guide rod moves upward, the limiting rod moves in the base, the static electrode moves upward, and the moving and static electrodes are relatively far away from each other.

[0032] When the cylinder rod of the overall gun body mechanism is extended, the moving electrode moves upward, the limiting pin is released from the limiting, thereby driving the mounting base plate to move downward, so that the static electrode mounting unit connected with the mounting base plate through the guide rod moves downward, the static electrode moves downward, and the moving and static electrodes are relatively close to each other, at this time, the welding operation can be performed.

[0033] The vertical installation slot is opened at the side end of the base, the pressing plate 10 is installed at the outside of the installation slot by screw, the limiting rod moves in the space formed by the upper installation slot and the pressing plate, the adjusting bolt is installed at the bottom of the installation slot and is screwed with the internal thread at the bottom of the limiting rod. A limiting circular platform 22 is arranged on the adjusting bolt and is limited on the installation platform arranged perpendicularly to the installation slot.

[0034] When assembling: the whole gun body mechanism and the floating mechanism are installed on the installation base plate.

[0035] The guide rod is fixedly connected with the installation base plate, and the guide rod is installed on the middle part of the base through the arranged oil seal and graphite bushing 17;

[0036] The spring sleeve rod passes through the hole on the base and is abutted against the static electrode installation unit of the whole gun body mechanism;

[0037] The spring sleeve is arranged on the spring sleeve rod, the spring sleeve rod is screwed, and the compression amount of the spring can be adjusted through the position of the compression nut at the upper end;

[0038] The limiting rod is installed in the rectangular installation slot opened on the base, and the opening of the installation slot is fixed with the pressing plate to prevent the limiting rod from falling out;

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

[0040] The limiting block is fixed with the limiting rod by the clamping groove and the bolt.

[0041] When working:

[0042] The base is installed on the guide rod of the installation base plate, and the insulating plate can ensure that the whole welding gun is insulated from the outside, the installation bolt is used in cooperation with the insulating plate to avoid electric leakage. When welding, the cylinder rod is extended, the moving electrode is abutted against the plate, because the plate is not moved, under the action of the cylinder rod, the whole gun body mechanism is moved downward, at this time, the fixed electrode is pressed against the plate, and the two electrodes are pressed and electrified to weld;

[0043] When the cylinder rod is retracted, the limiting pin will press the limiting block, and after being pressed, because the limiting block is not moved, the whole gun body mechanism will be lifted upward. At this time, the static electrode will also be lifted to separate from the plate.

[0044] On the one hand, by adjusting the height of the adjusting bolt, the limiting rod and the limiting block, the distance between the two electrodes and the plate can be adjusted, and the plate can be adjusted to the appropriate position; on the other hand, by adjusting the compression nut on the spring sleeve rod, the tension of the spring can be adjusted to balance the gravity of the whole gun body mechanism; the limiting stud can adjust the relative minimum position of the base and the installation base plate, so as to adjust the relative minimum position of the static electrode and the plate.

[0045] In use, the relative position of the moving and static electrodes and the plate is adjusted to the appropriate distance by adjusting the limiting stud and the adjusting bolt, and use can be carried out.

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

Claims

1. A floating welding device for a fixed spot welder, characterized by: It comprises a mounting base, a whole gun body mechanism and a floating mechanism, the whole gun body mechanism is fixed on one end of the mounting base, the floating mechanism is installed on the other end of the mounting base in up and down floating mode, a limit pin is installed on the cylinder rod of the whole gun body mechanism, and the limit pin is limited on a limit block arranged on the floating mechanism when it is lowered. The whole gun body mechanism comprises a moving electrode mounting unit and a static electrode mounting unit, the moving electrode mounting unit comprises a cylinder, a moving electrode and a limit pin, the cylinder is installed on the mounting base, the moving electrode is installed on the cylinder rod of the cylinder, and the limit pin is installed on the lower part of the cylinder rod in transverse mode. The static electrode mounting unit comprises L-shaped mounting plates, a static electrode mounting frame and a static electrode, a mounting block is fixed on the upper end surface of the cylinder, the cylinder rod of the cylinder is telescopic in the mounting block, the L-shaped mounting plates are arranged on the inner and outer sides of the mounting block in opposite mode, 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, and the static electrode is arranged in opposite mode with the moving electrode. The floating mechanism comprises a base, a guide rod, a limit rod, a limit block, an adjusting bolt, a spring sleeve rod, a spring and a supporting block, the guide rod is arranged in vertical mode on the other end of the mounting base, the upper part of the guide rod is connected between the two L-shaped mounting plates through a connecting block, the base is arranged on the guide rod, the limit rod is arranged on the base of one end of the guide rod, the limit block is arranged in horizontal mode on the top of the limit rod, the limit block is arranged on the lower end of the limit pin, the adjusting bolt is arranged on the bottom of the limit rod and fixed on the base, the spring sleeve rod is arranged on the base of the other end of the guide rod, the spring is arranged on the upper end of the spring sleeve rod, the pressure nut is threadedly connected on the spring, and the supporting block is arranged on the pressure nut and supported on the lower end of the two L-shaped mounting plates.

2. A floating welding device for a fixed spot welder according to claim 1, characterized in that: An insulating plate is arranged on the side end of the base.

3. A floating welding device for a fixed spot welder according to claim 1, characterized in that: A vertical mounting groove is formed on the side end of the base, the pressing plate is arranged on the outer side of the mounting groove through a screw, the limit rod moves in the space formed by the upper part of the mounting groove and the pressing plate, and the adjusting bolt is arranged on the bottom of the mounting groove and threadedly connected with the inner thread of the bottom of the limit rod.

4. A floating welding device for a fixed spot welder according to claim 1, characterized in that: A limit stud is arranged on the bottom of the base and the mounting base in threaded mode.

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