Welding strip clamping device for welding

Abstract

The utility model belongs to the technical field of welding, and particularly relates to a welding bar clamping device for welding, which comprises a mechanical arm and a welding gun, the welding gun is mounted at the front end of the mechanical arm, and a clamping device is arranged in the welding gun. According to the welding strip clamping device for welding, after a welding strip is inserted into an inserting hole, the tail end of the welding strip pushes an abutting sliding plate to move backwards along the inner wall of a mounting bin, so that a flexible spring is extruded, a second electric contact on the inner side of the abutting sliding plate is in contact with a first electric contact, an electric signal is sent out, and a clamping unit is driven to clamp and fix the welding strip; and when an electric signal is transmitted to a master control position, a master control table controls an electromagnet to be powered on, so that repulsive force is generated between the electromagnet and a sliding rod, the sliding rod is pushed to slide towards the outer side along a sliding cavity, an extension spring is made to stretch, the welding strip is clamped and fixed through an arc-shaped clamping block, and the welding strip is prevented from being broken or falling off during welding. And looseness is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a welding strip clamping device for welding. Background Art

[0002] The welding gun of the electric spark welding repair machine is an important electromechanical equipment. The welding gun often has the following obvious defects during operation: 1. Metal splash particles are generated when the welding wire and the workpiece are welded, and then fall into the gap between the carbon brush structure and the welding wire chuck, causing a gap between the carbon brush structure and the welding wire chuck, resulting in vibration between the carbon brush structure and the welding wire chuck to produce electric spark erosion; 2. Electric spark erosion will continuously damage the carbon brush body, causing the carbon brush to be quickly consumed and damaged. At the same time, the vibration of the carbon brush structure will continuously pull the wire, which can easily cause the wire head to fall off, and eventually cause the welding gun to fail to work, affecting normal use, and reducing efficiency and life.

[0003] For example, Chinese patent announcement No. CN211162346U discloses a welding gun structure of an electric spark cladding repair machine. When in use, the main shaft assembly is driven by a reduction motor to perform rotational motion, while driving the welding wire chuck to perform continuous rotational motion. At the same time, the welding gun current is transmitted from the carbon brush assembly to the welding wire chuck through the main shaft assembly. The carbon brush assembly remains stationary, and the main shaft assembly performs rotational motion. The carbon brush body is tightly fitted to the outer side of the brass sleeve of the main shaft assembly through a spring to conduct a large current. This welding gun has a compact structure and is free of electric spark erosion, so as to achieve the effect of not exposing the wire to the outside, reducing the weight and extending the service life.

[0004] However, the welding gun structure of the electric spark cladding repair machine in the above application may cause the welding rod to loosen or even fall when clamping the welding rod, so it is necessary to strengthen the clamping function of the welding rod. Therefore, there are certain limitations.

[0005] For this reason, we urgently need to provide a welding strip clamping device for welding. Utility Model Content

[0006] The purpose of the utility model is to provide a welding rod clamping device for welding, so as to solve the problem that the welding rod may become loose or even fall off when the welding rod is clamped, so it is necessary to strengthen the clamping function of the welding rod.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a welding rod clamping device for welding, comprising a mechanical arm and a welding gun, wherein the welding gun is installed at the front end of the mechanical arm, and a clamping device is arranged inside the welding gun.

[0008] The clamping device comprises a plug-in unit, a sensor unit and a clamping unit.

[0009] The plug-in unit includes a welding gun front cover, a welding chuck, and a welding rod. The welding gun front cover is fixedly connected to the front end of the welding gun, the welding chuck is installed inside the welding gun front cover, and the welding rod is plugged into the inside of the welding chuck. The welding rod can be quickly replaced by inserting the welding rod into the inside of the welding chuck.

[0010] A further improvement is that the sensing unit includes a first electric contact, a flexible spring, an abutment slide, and a second electric contact, the first electric contact is installed inside the welding clamp, the flexible spring is installed outside the first electric contact, the abutment slide is fixedly connected to the outer end of the flexible spring, and the second electric contact is installed on the inner surface of the abutment slide.

[0011] A further improvement is that a plug-in hole is provided at the center of the welding chuck, the welding rod is plugged into the inside of the plug-in hole, a mounting chamber is provided at the tail of the plug-in hole, and the sensor unit is installed in the inside of the mounting chamber. When the welding rod is inserted into the inside of the plug-in hole, its tail end pushes the abutment slide plate to move backward along the inner wall of the mounting chamber, thereby squeezing the flexible spring so that the second electrical contact on the inner side of the abutment slide plate contacts the first electrical contact, thereby sending an electrical signal to drive the clamping unit to clamp and fix the welding rod, thereby avoiding the welding rod being inserted falsely, resulting in breakage or falling off during welding.

[0012] A further improvement is that the clamping unit includes a sliding chamber, an electromagnet, a tension spring, a sliding rod, and an arc-shaped clamping block. The sliding chamber is opened inside the welding chuck, the electromagnet is installed on the inner wall of the sliding chamber, the tension spring is fixedly connected to the outside of the electromagnet, the sliding rod is fixedly connected to the outside of the tension spring and is slidably connected to the inside of the sliding chamber, and the arc-shaped clamping block is fixedly connected to the outer end of the sliding rod.

[0013] A further improvement is that the sliding rod is made of magnetic material. When the electrical signal is transmitted to the main control, the main control console controls the electromagnet to be energized, thereby generating a repulsive force between the sliding rod and the sliding rod, thereby pushing the sliding rod to slide outward along the sliding cavity and stretching the tension spring, so that the arc-shaped clamp block clamps the welding strip to prevent it from loosening. The inner wall of the arc-shaped clamp block is fixedly connected with a convex block, which increases the friction with the welding strip and improves the stability of the clamping.

[0014] A further improvement is that there are two groups of clamping units, which are symmetrically arranged on both sides of the inside of the welding chuck with the center line of the welding chuck as the axis, and the two arc-shaped clamping blocks cooperate to better clamp and fix the welding rod.

[0015] A further improvement is that a heat dissipation shell is installed on the outside of the welding chuck, and the heat dissipation shell is made of copper alloy. The heat dissipation shell can quickly dissipate and cool the heat generated during welding, thereby better protecting the welding chuck and increasing its service life.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The welding rod clamping device for welding, when the welding rod is inserted into the inside of the plug-in hole, its tail end pushes the abutment slide to move backward along the inner wall of the installation bin, thereby squeezing the flexible spring, so that the second electrical contact on the inner side of the abutment slide contacts the first electrical contact, thereby sending an electrical signal to drive the clamping unit to clamp and fix the welding rod, thereby preventing the welding rod from being inserted falsely, causing it to break or fall off during welding.

[0018] 2. The welding rod clamping device for welding, when the electrical signal is transmitted to the main control, the main control console controls the electromagnet to be energized, thereby generating a repulsive force between the electromagnet and the slide bar, thereby pushing the slide bar to slide outward along the slide cavity and stretching the tension spring, so that the arc-shaped clamping block clamps the welding rod to prevent it from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the independent structure of the clamping device of the utility model;

[0021] Figure 3 This is a schematic cross-sectional view of the clamping device of the utility model;

[0022] Figure 4 This is a schematic diagram of the independent structure of the sensing unit of the utility model;

[0023] Figure 5 It is a schematic diagram of the independent structure of the clamping unit of the utility model.

[0024] In the figure: 1. Robotic arm; 2. Welding gun; 301. Front cover of welding gun; 302. Welding chuck; 303. Welding rod; 304. First electrical contact; 305. Flexible spring; 306. Abutting slide; 307. Second electrical contact; 308. Sliding cavity; 309. Electromagnet; 310. Tension spring; 311. Sliding rod; 312. Arc-shaped clamp; 4. Heat dissipation shell. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0027] Embodiment 1:

[0028] A welding rod clamping device for welding comprises a mechanical arm 1 and a welding gun 2. The welding gun 2 is installed at the front end of the mechanical arm 1, and a clamping device is arranged inside the welding gun 2.

[0029] The clamping device comprises a plug-in unit and a clamping unit.

[0030] The plug-in unit includes a welding gun front cover 301, a welding chuck 302, and a welding rod 303. The welding gun front cover 301 is fixedly connected to the front end of the welding gun 2, the welding chuck 302 is installed inside the welding gun front cover 301, and the welding rod 303 is plugged into the inside of the welding chuck 302. The welding rod 303 can be quickly replaced by inserting the welding rod 303 into the welding chuck 302.

[0031] The clamping unit includes a sliding chamber 308, an electromagnet 309, a tension spring 310, a sliding rod 311, and an arc-shaped clamp block 312. The sliding chamber 308 is opened inside the welding chuck 302, the electromagnet 309 is installed on the inner wall of the sliding chamber 308, the tension spring 310 is fixedly connected to the outer side of the electromagnet 309, the sliding rod 311 is fixedly connected to the outside of the tension spring 310 and is slidably connected to the inside of the sliding chamber 308, and the arc-shaped clamp block 312 is fixedly connected to the outer end of the sliding rod 311.

[0032] The slide bar 311 is made of magnetic material. When the electromagnet is energized, a repulsive force is generated between the slide bar and the electromagnet, thereby pushing the slide bar to slide outward along the sliding cavity and stretching the tension spring, so that the arc-shaped clamping block clamps the welding strip to prevent it from loosening.

[0033] There are two groups of clamping units, which are symmetrically arranged on both sides of the inside of the welding chuck 302 with the center line of the welding chuck 302 as the axis. The two arc-shaped clamping blocks 312 cooperate to better clamp and fix the welding rod 303.

[0034] A heat sink 4 is installed outside the welding chuck 302. The heat sink 4 is made of copper alloy. The heat generated during welding is quickly dissipated and cooled by the heat sink 4, which better protects the welding chuck 302 and increases its service life.

[0035] Embodiment 2:

[0036] On the basis of the first embodiment, the inner wall of the arc-shaped clamping block 312 is fixedly connected with a convex block, which increases the friction force with the welding strip 303 and improves the clamping stability.

[0037] Embodiment three:

[0038] On the basis of the second embodiment, the clamping device includes a sensing unit, which includes a first electrical contact 304, a flexible spring 305, an abutment slide 306, and a second electrical contact 307. The first electrical contact 304 is installed inside the welding clamp 302, the flexible spring 305 is installed outside the first electrical contact 304, the abutment slide 306 is fixedly connected to the outer end of the flexible spring 305, and the second electrical contact 307 is installed on the inner surface of the abutment slide 306.

[0039] A plug hole is provided at the center of the welding chuck 302, and the welding rod 303 is plugged into the inside of the plug hole. A mounting chamber is provided at the tail of the plug hole, and the sensor unit is installed in the inside of the mounting chamber.

[0040] When the welding rod 303 is inserted into the plug hole, its tail end pushes the abutment slide 306 to move backward along the inner wall of the installation chamber, thereby squeezing the flexible spring 305, so that the second electrical contact 307 on the inner side of the abutment slide 306 contacts the first electrical contact 304, thereby sending an electrical signal to drive the clamping unit to clamp and fix the welding rod 303, thereby preventing the welding rod 303 from being inserted falsely and causing it to break or fall off during welding.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A welding rod clamping device for welding, comprising a mechanical arm (1) and a welding gun (2), wherein the welding gun (2) is mounted at the front end of the mechanical arm (1), characterized in that: A clamping device is provided inside the welding gun (2); The clamping device comprises a plug-in unit, a sensing unit and a clamping unit; The plug-in unit comprises a welding gun front cover (301), a welding chuck (302), and a welding rod (303); the welding gun front cover (301) is fixedly connected to the front end of a welding gun (2); the welding chuck (302) is installed inside the welding gun front cover (301); and the welding rod (303) is plugged into the inside of the welding chuck (302).

2. A welding rod clamping device for welding according to claim 1, characterized in that: The sensing unit comprises a first electric contact (304), a flexible spring (305), an abutting slide plate (306), and a second electric contact (307); the first electric contact (304) is installed inside the welding clamp (302); the flexible spring (305) is installed outside the first electric contact (304); the abutting slide plate (306) is fixedly connected to the outer end of the flexible spring (305); and the second electric contact (307) is installed on the inner surface of the abutting slide plate (306).

3. A welding rod clamping device for welding according to claim 2, characterized in that: The center of the welding chuck (302) is provided with a plug-in hole, the welding rod (303) is plugged into the inside of the plug-in hole, the rear of the plug-in hole is provided with a mounting chamber, and the sensor unit is mounted inside the mounting chamber.

4. A welding rod clamping device for welding according to claim 3, characterized in that: The clamping unit includes a sliding chamber (308), an electromagnet (309), a tension spring (310), a sliding rod (311), and an arc-shaped clamping block (312); the sliding chamber (308) is opened inside the welding chuck (302); the electromagnet (309) is installed on the inner wall of the sliding chamber (308); the tension spring (310) is fixedly connected to the outer side of the electromagnet (309); the sliding rod (311) is fixedly connected to the outside of the tension spring (310) and is slidably connected to the inside of the sliding chamber (308); and the arc-shaped clamping block (312) is fixedly connected to the outer end of the sliding rod (311).

5. A welding rod clamping device for welding according to claim 4, characterized in that: The sliding rod (311) is made of magnetic material, and the inner wall of the arc-shaped clamping block (312) is fixedly connected with a convex block.

6. A welding rod clamping device for welding according to claim 5, characterized in that: There are two groups of clamping units in total. The two groups of clamping units are symmetrically arranged on both sides of the inside of the welding clamp (302) with the center line of the welding clamp (302) as the axis.

7. A welding rod clamping device for welding according to claim 1, characterized in that: A heat dissipation shell (4) is installed on the outside of the welding chuck (302), and the heat dissipation shell (4) is made of copper alloy.

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