CN111299789A - Welding tongs of C-shaped servo spot welding robot - Google Patents

Abstract

The invention relates to the technical field of welding tongs, in particular to a C-shaped servo spot welding robot welding tong which comprises a main bracket and a transformer, the transformer is fixedly arranged between two lateral supporting plates, a flange connecting plate is fixedly arranged at mounting holes of the lateral supporting plates, a plurality of mounting holes of the flange connecting plate are formed in the upper portion of the flange connecting plate, an electrode arm supporting frame is fixedly arranged in the middle of the two lateral supporting plates, a driving mechanism is fixedly arranged at the rear portion of a horizontal bottom plate of the electrode arm supporting frame, a guide rail is fixedly arranged at the front portion of the horizontal bottom plate, an electrode arm mounting seat is clamped on the guide rail, an electrode arm is fixedly arranged at the front end of the electrode arm mounting seat, an electrode rod and an electrode cap are fixedly arranged at the front end of the electrode arm, the welding arm is fixedly arranged at the front portion of the two lateral supporting plates, the tail end of the welding arm is bent downwards, and the static electrode arm is fixedly arranged at the lower end of the welding arm in. The device provided by the invention has the advantages of simple structure, energy conservation, light weight, high modularization and high interchangeability.

Description

A C-type servo spot welding robot welding gun

technical field

The invention relates to the technical field of welding tongs, in particular to a C-type servo spot welding robot welding tongs.

Background technique

With the continuous development of the automobile industry, the requirements for the production process of automobiles are increasing year by year. The welding process accounts for the largest proportion of many production processes. Through welding, parts of different shapes and materials can be combined to meet the needs of the shape and performance of mechanical products. Compared with arc welding, spot welding technology has the advantages of no welding accessories, no harmful smoke, high welding rhythm, low welding stress, and no damage to the internal structure of the workpiece, so it is widely used in the welding project of body-in-white stamping plates. According to the different tooling and plate parts, the welding tongs used in the current spot welding technology are basically divided into C-type welding tongs, X-shaped welding tongs and unilateral welding tongs. In recent years, the development of industrial robot technology has greatly improved the degree of automation in the welding field. Correspondingly, automatic welding tongs driven by robots are also used more in production.

The structure of the servo robot welding gun usually includes the welding gun body, the welding gun driving part, and the transformer assembly. In practical applications, the targeted structural design is carried out according to the different needs of tooling, plate parts, welding posture, etc. This situation seriously increases the design workload of the welding tongs and slows down the production cycle of the welding tongs. At the same time, the low interchangeability of the welding tongs parts limits the mass production, which increases the cost of a single welding tongs. Clamp makers and auto assembly plants took their toll.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a C-type servo spot welding robot welding gun with simple structure, energy saving and lightness, high modularity and high interchangeability.

The present invention is achieved through the following technical solutions:

A C-type servo spot welding robot welding tong, which includes a main bracket, a transformer, a welding arm, a static electrode arm and a moving electrode arm, the main bracket includes two side support plates, and the two side support plates pass through The transformer connecting plate is fixedly installed with bolts, and the transformer is fixedly installed under the transformer connecting plate by bolts and is located between two side support plates, wherein a plurality of side parts surrounding concentric circles are opened at the rear of one side support plate Support plate mounting holes, flange connection plates are fixed and installed at the plurality of side support plate mounting holes by bolts, the upper part of the flange connection plate is arc-shaped, and there are a plurality of side support plate mounting holes corresponding to The mounting hole of the flange connection plate, the lower end of the flange connection plate is fixedly installed with a flange, the middle of the two side support plates is fixedly installed with a movable electrode arm support frame by bolts, and the movable electrode arm support frame includes two The L-shaped support arm fixedly connected to the side support plate and the horizontal base plate fixedly installed at the bottom of the two support arms. The movable electrode arm mounting seat is clamped on the guide rail, and the movable electrode arm mounting seat is driven by the driving mechanism to reciprocate along the guide rail. The movable electrode arm is fixedly installed on the front end of the movable electrode arm mounting seat, and the front end of the movable electrode arm is fixedly installed There are electrode rods and electrode caps, the welding arms are fixedly installed on the front of the two side support plates by bolts and the ends are bent downwards, the static electrode arms are L-shaped fixedly installed on the lower end of the welding arms, and the static electrode arms are The other end of the transformer is opposite to the movable electrode arm, the positive pole of the transformer is connected to the welding arm through the secondary conductor and the conductive strip, and the negative pole of the transformer is connected to the movable electrode arm mounting seat through the secondary conductor and the conductive strip.

Further, a water separator is fixedly installed below the main support, the water separator is provided with a water inlet and three water outlets, and the first cooling pipeline is communicated with the first water outlet and flows out from the positive pole of the transformer into the negative pole and then flows out. The return water pipeline is connected, the second cooling pipeline is connected with the second water outlet and flows into the other side along the welding arm and the static electrode arm and flows out, and then is connected with the return water pipeline, and the third cooling pipeline is connected with the third water outlet It flows through the secondary conductor, the movable electrode arm mounting seat, the movable electrode arm, the electrode rod and the electrode cap, and then returns to the return water pipeline.

Further, the driving mechanism is a linear servo electric cylinder, and the driving rod of the linear servo electric cylinder is fixedly connected with the movable electrode arm mounting seat.

Further, water pipe installation grooves are provided on the inner and outer sides of the welding arm, and the second cooling pipeline is horizontally arranged in the water pipe installation groove.

Further, a reinforcing rod is fixedly installed in the middle of the two side support plates.

Further, a plurality of weight-reducing holes are respectively provided on the flange connecting plate and the main support.

The beneficial effects of the present invention

The C-type servo spot welding robot welding tongs protected by the present invention adopts a highly modular and minimalist design as a whole, and except for the necessary welding arms and electrode arms, the rest of the parts can be interchanged. In assembly, the welding arm, water dividing block, static electrode arm and secondary conductor can be regarded as a module, and the movable electrode arm support frame, driving mechanism, movable electrode arm mounting seat, movable electrode arm, electrode rod and electrode cap can be seen As a module, the main bracket and the transformer can be regarded as one, and each module can be assembled separately and then assembled together. Most parts can be pre-produced in large quantities, reducing production costs and shortening production cycles. On the premise of ensuring the overall strength and performance of the welding gun, the structure is simpler and the number of parts is less. Make welding gun assembly and maintenance easier.

In addition, the flange plate and the flange support plate can be rotated and installed on the main body of the welding tongs, which can meet the different connection postures of the welding tongs and the robot.

Description of drawings

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is the assembly structure schematic diagram of the present invention;

In the figure 1. flange, 2. weight reduction hole, 3. flange connection plate, 4. linear servo electric cylinder, 5. transformer, 6. secondary conductor, 7. conductive tape, 8. water pipe installation groove, 9. Welding arm, 10. Static electrode arm, 11. Reinforcing rod, 12. Moving electrode arm, 13. Linear guide rail, 14. Moving electrode arm mounting seat, 15. Moving electrode arm support frame, 16. Transformer connecting plate, 17. Points Water device, 18. Side support plate.

Detailed ways

A C-type servo spot welding robot welding tongs include a main bracket, a transformer 5, a welding arm 9, a static electrode arm 10 and a movable electrode arm 12. The main bracket includes two side support plates 18, two side parts A transformer connecting plate 16 is fixedly installed between the support plates by bolts, and the transformer is fixedly installed under the transformer connecting plate by bolts and is located between two side support plates, and a plurality of enclosures are opened at the rear of one side support plate. The mounting holes of the side support plates are concentric circles, and the flange connection plates 3 are fixed and installed by bolts at the mounting holes of the side support plates. The flange 1 is fixedly installed at the lower end of the flange connection plate, and the movable electrode arm support frame 15 is fixedly installed in the middle of the two side support plates by bolts. The movable electrode arm support frame includes two L-shaped support arms fixedly connected with the side support plates and a horizontal base plate fixedly installed at the bottom of the two support arms. The rear part of the horizontal base plate is fixedly installed with a driving mechanism, and the front part is fixedly installed There are two linear guide rails 13 , and the movable electrode arm mounting seat 14 is clamped on the two linear guide rails. The movable electrode arm mounting seat is driven by the driving mechanism to reciprocate along the guide rails, and the movable electrode arm is fixedly installed on the movable electrode arm. The front end of the seat and the front end of the movable electrode arm are fixedly installed with an electrode rod and an electrode cap. The welding arm is fixedly installed on the front of the two side support plates by bolts and the ends are bent downward. The static electrode arm is fixed in an L shape. It is installed on the lower end of the welding arm and the other end of the static electrode arm is opposite to the movable electrode arm. The positive pole of the transformer is connected to the welding arm through the secondary conductor 6 and the conductive strip 7, and the negative pole of the transformer is connected to the movable electrode through the secondary conductor and the conductive strip. Arm mounts communicate.

Further, a water separator 17 is fixedly installed below the main support, the water separator is provided with a water inlet and three water outlets, and the first cooling pipeline is communicated with the first water outlet and flows out from the positive pole of the transformer into the negative pole. Connected to the return water line, the transformer can be cooled. The second cooling pipeline communicates with the second water outlet, flows into the other side along the welding arm and the static electrode arm, and flows out from the other side, and then communicates with the return water pipeline, which can cool the welding arm and the static electrode arm.

The third cooling pipeline communicates with the third water outlet and flows through the secondary conductor, the movable electrode arm mounting seat, the movable electrode arm, the electrode rod and the electrode cap, and then returns to the return water pipeline, which can cool the movable electrode arm system.

Further, the driving mechanism is a linear servo electric cylinder 4, the driving rod of the linear servo electric cylinder is fixedly connected with the movable electrode arm mounting seat, the linear servo electric cylinder replaces the traditional servo welding tong drive part, and the linear servo electric cylinder can be directly connected with the movable electrode arm. . The transmission of the synchronous pulley and the synchronous belt is eliminated, and the control of the electrode pressure and displacement is more precise and subtle. At the same time, it cooperates with two linear guide rails to ensure the accurate guidance of the moving direction of the moving electrode arm.

Further, the inner and outer sides of the welding arm are provided with water pipe installation grooves 8, and the second cooling pipeline is horizontally arranged in the water pipe installation groove, which makes the overall structure more compact and protects the cooling pipeline.

Further, a reinforcing rod 11 is fixedly installed in the middle of the two side support plates, and the two side support plates are fixedly connected together by the reinforcing rod, so that the overall structure is more stable.

Further, a plurality of weight-reducing holes 2 are respectively opened on the flange connecting plate and the main support, which reduces the weight of the overall structure and facilitates moving and changing different connection postures.

When the present invention works, the steps are as follows: the welding tongs are mounted on the robot through the flange, and the robot reaches the predetermined position. The driving mechanism pushes the movable electrode arm mounting seat, and the linear guide rail drives the electrode head to the welding position, so that the two workpieces to be welded are in contact with the static electrode arm and the electrode cap of the movable electrode head and are pressed tightly. After the secondary conductor, the welding arm, the static electrode arm, the electrode cap at the end of the static electrode arm, the workpiece to be welded, the electrode cap at the end of the movable electrode arm, the electrode connecting rod, the movable electrode arm, the movable electrode arm mounting seat, the secondary The conductor eventually flows back to the negative terminal of the transformer. At this point heat is released at the solder joints and the workpieces are welded together.

Due to the highly modular and minimalist design of the welding tongs as a whole, except for the necessary welding arms and electrode arms, the rest of the parts can be interchanged. In assembly, the welding arm, water dividing block, static electrode arm and secondary conductor can be regarded as a module, and the movable electrode arm support frame, driving mechanism, movable electrode arm mounting seat, movable electrode arm, electrode rod and electrode cap can be seen As a module, the main bracket and the transformer can be regarded as one, and each module can be assembled separately and then assembled together. Most parts can be pre-produced in large quantities, reducing production costs and shortening production cycles. On the premise of ensuring the overall strength and performance of the welding gun, the structure is simpler and the number of parts is less. Make welding gun assembly and maintenance easier.

In addition, the flange plate and the flange support plate are fixed with bolts through the different mounting holes of the side support plate, which can be rotated and installed on the main body of the welding tongs, which can meet the different connection postures of the welding tongs and the robot.

The workshop cooling water flows from the water separator into three paths, one for cooling the transformer, one for cooling the welding arm and electrode arm, and one for cooling the boom system, which can prevent the equipment from overheating and damage the equipment, and the cooling module can be independent of the welding tongs After the module is assembled, the connector can be connected.

To sum up, the C-type servo spot welding robot welding tongs protected by the present application has the advantages of simple structure, energy saving and light weight, high modularity and high interchangeability.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. A C-shaped servo spot welding robot soldering turret is characterized by comprising a main support, a transformer, a welding arm, a static electrode arm and a movable electrode arm, wherein the main support comprises two side support plates, a transformer connecting plate is fixedly arranged between the two side support plates through bolts, the transformer is fixedly arranged below the transformer connecting plate and positioned between the two side support plates through bolts, a plurality of side support plate mounting holes which are enclosed into concentric circles are formed in the rear part of one side support plate, a flange connecting plate is fixedly arranged at the mounting holes of the plurality of side support plates through bolts, the upper part of the flange connecting plate is arc-shaped and is provided with a plurality of flange connecting plate mounting holes corresponding to the mounting holes of the side support plates, a flange is fixedly arranged at the lower end of the flange connecting plate, and a movable electrode arm support frame is fixedly arranged in the middle parts, the dynamic electrode arm supporting frame comprises two L-shaped supporting arms fixedly connected with the side supporting plate and a horizontal bottom plate fixedly arranged at the bottom of the two supporting arms, the rear part of the horizontal bottom plate is fixedly provided with a driving mechanism, the front part of the horizontal bottom plate is fixedly provided with two linear guide rails, the two linear guide rails are clamped with a movable electrode arm mounting seat, the movable electrode arm mounting seat is driven by a driving mechanism to reciprocate along the guide rail, the movable electrode arm is fixedly mounted at the front end of the movable electrode arm mounting seat, an electrode rod and an electrode cap are fixedly mounted at the front end of the movable electrode arm, the welding arm is fixedly installed at the front parts of the two side supporting plates through bolts, the tail end of the welding arm is bent downwards, the static electrode arm is L-shaped and is fixedly installed at the lower end of the welding arm, the other end of the static electrode arm is opposite to the dynamic electrode arm, the positive electrode of the transformer is communicated with the welding arm through a secondary conductor and a conductive belt, and the negative electrode of the transformer is communicated with the mounting seat of the dynamic electrode arm through the secondary conductor and the conductive belt.

2. The welding tongs of the C-shaped servo spot welding robot as claimed in claim 1, wherein a water separator is fixedly installed below the main support, the water separator is provided with a water inlet and three water outlets, a first cooling pipeline is communicated with the first water outlet and flows out from the positive electrode to the negative electrode of the transformer and then is communicated with a water return pipeline, a second cooling pipeline is communicated with the second water outlet and flows in from one side of the welding arm and the static electrode arm to the other side and then is communicated with the water return pipeline, and a third cooling pipeline is communicated with the third water outlet and flows through the secondary conductor, the movable electrode arm mounting base, the movable electrode arm, the electrode rod and the electrode cap and then flows back to the water return pipeline and is communicated with the water return pipeline.

3. The C-shaped servo spot welding robot electrode holder according to claim 1, wherein the driving mechanism is a linear servo electric cylinder, and a driving rod of the linear servo electric cylinder is fixedly connected with the movable electrode arm mounting seat.

4. The welding tongs of the C-shaped servo spot welding robot as claimed in claim 2, wherein the welding arms are provided with water pipe installation grooves on the inner and outer sides, and the second cooling pipeline is horizontally arranged in the water pipe installation grooves.

5. A C-shaped servo spot welding robot electrode holder according to claim 1, wherein a reinforcing rod is fixedly installed in the middle of the two side supporting plates.

6. The welding tongs of the C-shaped servo spot welding robot as claimed in claim 1, wherein a plurality of lightening holes are respectively formed on the flange connecting plate and the main bracket.

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