Automatic welding robot

Abstract

The invention belongs to the technical field of welding robots, and particularly relates to an automatic welding robot which comprises a machine main body, a clamping mechanism and a cleaning mechanism, and a welding head is movably arranged on the machine main body; the clamping mechanism comprises two clamping seats which are arranged on the machine main body in a sliding manner; the clamp is arranged on the clamping seat and is used for clamping a weldment; the cleaning mechanism comprises a brush plate arranged on the machine body in a sliding mode. A brush plate is arranged to brush and clean a weldment, welding is conducted immediately after cleaning, cleaning and welding work are integrated, and the working efficiency is improved; heat generated during welding is recycled, the spring assembly is tightened for energy storage, so that driving force is provided for the brush plate during cleaning work, an electric driving system for cleaning work does not need to be additionally arranged, energy consumption is reduced, and the use cost is reduced.

Description

Technical Field

[0001] The invention belongs to the field of welding robots, in particular to an automatic welding robot. Background Art

[0002] When spot welding and other welding operations are performed on metal parts such as copper and aluminum, welding robots are often used to perform automated welding work. The welding robot generally includes a main body and a welding head. The type of welding head is selected and installed according to the welding method. The welding types of the welding head include arc welding and laser welding. In order to ensure the stability of the weldment during the welding process, a clamping device will also be set on the welding robot to clamp the weldment.

[0003] Existing automatic welding robots generally include a housing and a welding module. A supporting mechanism for supporting the workpiece is installed on the housing. When performing welding work such as spot welding, the two welded parts to be welded are first placed on two supporting mechanisms and clamped respectively, and then the two supporting mechanisms are moved and the positions of the welded parts are adjusted so that the two welds fit together and keep the position fixed, and then the two welded parts are welded together through the welding module.

[0004] Before welding, the surface of the weldment must be clean and free of impurities such as oil, rust, and dust. The presence of these impurities will lead to a decrease in the quality of the weld. The conventional operation is to use a brush such as a copper wire brush or a nylon brush to clean the weldment. The cleaned weldment should be spot welded as soon as possible to avoid the surface being contaminated again and affecting the welding effect. In actual operation, the weldment is generally cleaned separately first, and then the weldment is transferred to the welding robot for clamping and position adjustment before welding can be carried out. The cleaning work is completely separated from the welding work of the weldment, resulting in low work efficiency.

[0005] To this end, the present invention provides an automatic welding robot. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: an automatic welding robot described in the present invention includes a machine body, a welding head is movably provided on the machine body, and also includes a clamping mechanism and a cleaning mechanism; the clamping mechanism includes: two clamping seats slidably provided on the machine body; a clamp provided on the clamping seat for clamping the weldment; the cleaning mechanism includes a brush plate slidably provided on the machine body, bristles for cleaning the weldment are provided on the side wall of the brush plate, and the brush plate is located between the two clamping seats.

[0008] Preferably, the cleaning mechanism also includes: a spring assembly slidably arranged on the machine body, a knob being provided in the spring assembly, a gear member being fixedly connected to the end of the knob, the knob meshing with the brush plate for transmission, and after the spring assembly releases energy, the brush plate is driven by the knob to move until it contacts the weldment; a reset spring arranged on the machine body for driving the brush plate to move back and reset.

[0009] Preferably, the cleaning mechanism further comprises: rotating an adjusting gear disposed on the machine body, wherein the adjusting gear meshes with the knob for transmission; sliding a ratchet plate disposed on the machine body, wherein the ratchet plate meshes with the adjusting gear, and wherein the ratchet plate drives the adjusting gear to rotate unidirectionally after movement.

[0010] Preferably, the cleaning mechanism further comprises a non-return pawl provided on the clockwork assembly, and the non-return pawl prevents the adjusting gear from rotating after contacting with the adjusting gear.

[0011] Preferably, it also includes a control mechanism, which includes: a temperature-changing element provided on the machine body, an end of which is connected to the ratchet plate; and a heat-conducting plate provided on the clamp seat, the other end of which is connected to the temperature-changing element.

[0012] Preferably, the control mechanism further comprises a driving gear rotatably arranged on the machine body, wherein the driving gear is meshingly connected with the clamping seat, and after the driving gear rotates, it drives the two clamping seats to move in opposite directions.

[0013] Preferably, the control mechanism also includes: a pushing spring provided on the machine body for pushing the clockwork assembly close to the brush plate; a driven rod fixedly connected to the clockwork assembly; and a shift plate fixedly connected to the driving gear, wherein during the rotation of the driving gear, the side wall of the shift plate contacts the driven rod to drive the clockwork assembly away from the brush plate.

[0014] Preferably, the driving gear is an incomplete gear, and the driven rod is staggered with the driving gear.

[0015] Preferably, the shift plate is in an arc shape, and the outer diameter of the shift plate is greater than the outer diameter of the driving gear. During the rotation of the driving gear, the shift plate contacts the clamping seat to fix the clamping seat.

[0016] Preferably, the cleaning mechanism further comprises: a receiving groove provided on the machine body, wherein the receiving groove is located below the clamping seat.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. An automatic welding robot described in the present invention cleans the weldment placed in the clamping mechanism by arranging a brush plate, and performs welding immediately after cleaning, thereby integrating cleaning and welding work and improving work efficiency. The heat generated during welding is reused, and the clockwork assembly is tightened to store energy, thereby providing driving force for the brush plate to perform cleaning work. There is no need to additionally set up an electric drive system for cleaning work, thereby saving energy consumption and reducing the cost of use.

[0019] 2. The automatic welding robot described in the present invention, by setting up the cooperation between the clamping mechanism, the cleaning mechanism and the control mechanism, when the clamping seat moves and drives the weldment to fit, the brush plate automatically moves back and forth to brush and clean the weldment that is stationary in the middle, and the position adjustment and cleaning of the weldment are automatically carried out, with a high degree of automation, and is suitable for continuous work.

[0020] 3. In the automatic welding robot described in the present invention, when performing continuous welding, the temperature of the previous weldment after welding is transferred to the heat conductive plate, so that the temperature of the heat conductive plate is higher. When the next weldment is placed on the clamp, the heat conductive plate can preheat the weldment, reducing the preheating time, thereby improving the welding effect and welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 is a three-dimensional diagram of the first embodiment of the present invention;

[0023] Figure 2 It is a three-dimensional diagram of the coordination status of the clamping mechanism, cleaning mechanism, control mechanism and weldment;

[0024] Figure 3 It is an exploded view of the clamping mechanism and the driving gear;

[0025] Figure 4 It is an exploded view of the brush plate, spring assembly and regulating gear;

[0026] Figure 5 This is a rear view of a single clamp seat, brush plate, spring assembly and temperature-changing element in coordination;

[0027] Figure 6 This is a bottom view of the clamping seat, driving gear and spring assembly in coordination;

[0028] In the figure: 1. Machine body; 2. Welding head; 3. Clamping mechanism; 31. Clamp seat; 32. Clamp; 4. Cleaning mechanism; 41. Brush plate; 42. Spring assembly; 421. Knob; 43. Reset spring; 44. Adjusting gear; 45. Ratchet plate; 46. Check pawl; 47. Receiving slot; 5. Control mechanism; 51. Temperature change component; 52. Heat conducting sheet; 53. Driving gear; 54. Push spring; 55. Follower rod; 56. Dial plate. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] Embodiment 1

[0031] like Figure 1-2 As shown, an automatic welding robot according to an embodiment of the present invention comprises a machine body 1, on which a welding head 2 is movably provided, and further comprises a clamping mechanism 3 and a cleaning mechanism 4;

[0032] The clamping mechanism 3 comprises: two clamping seats 31 slidably arranged on the machine body 1; a clamp 32 arranged on the clamping seats 31 for clamping the weldment;

[0033] The cleaning mechanism 4 includes a brush plate 41 slidably disposed on the machine body 1 , and bristles for cleaning weldments are disposed on the side walls of the brush plate 41 . The brush plate 41 is located between the two clamping seats 31 .

[0034] Specifically, the machine body 1 is provided with a welding machine matched with the welding head 2. The welding head 2 and the welding machine can adopt a structure such as arc welding. The bristles on the brush plate 41 are selected according to the specific production situation and can be steel wire bristles or nylon bristles. Figure 1 For example, the X-axis direction is the left-right direction, the Z-axis direction is the front-back direction, the clamp seat 31 can move left-right, the clamp 32 is slidably disposed on the clamp seat 31 and can move up and down, and the brush plate 41 can move forward and backward.

[0035] Initially, the two clamps 31 are far away from each other, the brush plate 41 is located on the rear side of the clamps 31, and the welding head 2 is located on the top. When spot welding and other welding operations are performed on the weldments, the two weldments are first placed on the two clamps 31 respectively. The adjacent side of the two weldments is provided with a to-be-welded area. The clamp 32 is moved downward to press and fix the weldments on the clamps 31. Then, the two clamps 31 are started to approach each other. When the two weldments move close to the brush plate 41, the brush plate 41 is started to move forward. After the brush plate 41 moves forward, it contacts the two weldments and brushes and cleans the weldments to improve the cleanliness of the to-be-welded area. Then, the brush plate 41 is moved backward and reset, staggered front and back with the weldments. Then, the two clamps 31 continue to approach each other until the two weldments are fitted together. The welding head 2 is started to move downward to weld the fitted part of the two weldments. The two welds are welded together. In this way, the welding work is completed. During operation, the welding robot first cleans the weldment with the brush plate 41 and then immediately performs welding after cleaning, which helps to improve the welding effect. The cleaning and welding work are integrated, thereby improving the working efficiency.

[0036] like Figure 2-5 As shown, the cleaning mechanism 4 also includes: a spring assembly 42 slidably arranged on the machine body 1, a knob 421 is provided in the spring assembly 42, a gear part is fixedly connected to the end of the knob 421, the knob 421 is meshed with the brush plate 41 for transmission, after the spring assembly 42 releases energy, the brush plate 41 is driven to move to contact the weldment through the knob 421; a reset spring 43 is arranged on the machine body 1 for driving the brush plate 41 to move back and reset.

[0037] Specifically, the two ends of the reset spring 43 are respectively connected to the brush plate 41 and the machine body 1, and the reset spring 43 is used to drive the brush plate 41 to move backward; the spring assembly 42 can move left and right, and the spring in the spring assembly 42 can be tightened by rotating the knob 421. After the spring releases energy, it drives the knob 421 to rotate. Initially, the knob 421 is located on the left side above the brush plate 41, and the knob 421 does not contact the brush plate 41 to facilitate the work of tightening the spring. A straight tooth section is provided on the top of the brush plate 41.

[0038] After the clockwork assembly 42 is tightened to store energy and moved to the right, the knob 421 contacts the straight tooth segment at the top of the brush plate 41. After the clockwork assembly 42 is released, the knob 421 rotates and drives the brush plate 41 to move forward. After the brush plate 41 moves forward, the weldment can be brushed and cleaned.

[0039] like Figure 2-5 As shown, the cleaning mechanism 4 also includes: rotating an adjusting gear 44 provided on the machine body 1, the adjusting gear 44 meshing with the knob 421 for transmission; sliding a ratchet plate 45 provided on the machine body 1, the ratchet plate 45 meshing with the adjusting gear 44, and the ratchet plate 45 drives the adjusting gear 44 to rotate in one direction after moving.

[0040] Specifically, the ratchet plate 45 can move forward and backward. When the ratchet plate 45 moves backward, it drives the adjusting gear 44 to rotate. When the ratchet plate 45 moves forward, it does not drive the adjusting gear 44 to rotate.

[0041] Initially, the knob 421 contacts the adjusting gear 44, and the ratchet plate 45 moves to drive the adjusting gear 44 to rotate, and the adjusting gear 44 rotates to drive the knob 421 to rotate, thereby tightening the clockwork assembly 42; after the clockwork assembly 42 moves to the right, the knob 421 contacts the brush plate 41 and separates from the adjusting gear 44, and then the clockwork assembly 42 releases energy, and the knob 421 can drive the brush plate 41 to move forward. By setting the adjusting gear 44 and utilizing the amplification principle of gear transmission, the ratchet plate 45 can drive the knob 421 to rotate more circles through the adjusting gear 44 after it moves, thereby tightening the clockwork assembly 42 more.

[0042] like Figure 2-4 As shown, the cleaning mechanism 4 further includes a non-return pawl 46 disposed on the clockwork assembly 42 , and the non-return pawl 46 prevents the adjusting gear 44 from rotating after contacting the adjusting gear 44 .

[0043] Specifically, initially, the spring assembly 42 is located on the left side, the knob 421 is in contact with the adjusting gear 44, and the non-return pawl 46 is also in contact with the adjusting gear 44, preventing the adjusting gear 44 from rotating, thereby preventing the knob 421 from rotating, thereby preventing the spring assembly 42 from releasing energy and ensuring the smooth tightening of the spring; after the spring assembly 42 moves to the right, the knob 421 and the non-return pawl 46 are separated from the adjusting gear 44, and the knob 421 is meshed and connected with the brush plate 41.

[0044] like Figure 2-6 As shown, it also includes a control mechanism 5, which includes: a temperature-changing component 51 arranged on the machine body 1, and the end of the temperature-changing component 51 is connected to the ratchet plate 45; a heat-conducting plate 52 arranged on the clamp seat 31, and the other end of the heat-conducting plate 52 is connected to the temperature-changing component 51.

[0045] Specifically, the temperature-variable component 51 is a material that automatically deforms and restores its shape under the influence of temperature. The temperature-variable component 51 is preferably, but not limited to, a bimetallic structure; the heat-conducting sheet 52 is a deformable flexible heat-conducting material, one end of which is fixed to the clamp seat 31. During the movement of the clamp seat 31, the other end of the heat-conducting sheet 52 is always connected to the temperature-variable component 51. After the weldment is clamped and fixed in the clamp seat 31, the weldment contacts the heat-conducting sheet 52, and a large amount of heat is generated during the welding process. The heat dissipated during welding and the temperature in the weldment are transferred to the temperature-variable component 51 through the heat-conducting sheet 52, causing the temperature-variable component 51 to deform due to heat. After the temperature-variable component 51 is deformed, it drives the ratchet plate 45 to move backward, thereby tightening the clockwork assembly 42 to store energy.

[0046] like Figure 2-5 As shown, the control mechanism 5 also includes a driving gear 53 rotatably disposed on the machine body 1 , and the driving gear 53 is meshedly connected with the clamping seat 31 . After the driving gear 53 rotates, it drives the two clamping seats 31 to move in opposite directions.

[0047] Specifically, the driving gear 53 is located at the rear side of the clamping seat 31 . Two driving gears 53 are provided. The rear side wall of the clamping seat 31 is provided with a tooth segment meshing with the driving gear 53 . When the driving gear 53 rotates, it drives the clamping seat 31 to move.

[0048] like Figure 2-6 As shown, the control mechanism 5 also includes: a pushing spring 54 arranged on the machine body 1 for pushing the spring assembly 42 close to the brush plate 41; a driven rod 55 fixedly connected to the spring assembly 42; and a shift plate 56 fixedly connected to the driving gear 53. During the rotation of the driving gear 53, the side wall of the shift plate 56 contacts the driven rod 55 and drives the spring assembly 42 away from the brush plate 41.

[0049] Specifically, the two ends of the push spring 54 are respectively connected to the spring assembly 42 and the machine body 1. The push spring 54 is used to push the spring assembly 42 to move right. During the rotation of the driving gear 53, the shift plate 56 contacts the driven rod 55 and pushes the driven rod 55 to move left, thereby driving the spring assembly 42 to move left.

[0050] like Figure 2-6 As shown, the driving gear 53 is an incomplete gear, and the driven rod 55 is staggered with the driving gear 53 .

[0051] Specifically, the driven rod 55 is located above the driving gear 53, and the driven rod 55 only contacts the paddle plate 56. A notch is provided in the teeth on the ring side of the driving gear 53. During the rotation of the driving gear 53, the teeth on the ring side of the driving gear 53 first contact the clamp seat 31, driving the clamp seat 31 to approach the brush plate 41, and then the teeth on the ring side of the driving gear 53 separate from the clamp seat 31, and the clamp seat 31 does not move. When the clamp seat 31 does not move, the brush plate 41 moves forward to wipe and clean the weldment on the clamp seat 31, and then the driving gear 53 continues to rotate, and the teeth on the ring side of the driving gear 53 continue to contact the clamp seat 31, driving the clamp seat 31 to move until the two welds are fitted together; after the welding is completed and the weldment is taken out, the driving gear 53 is started to rotate in the opposite direction, so that the two clamp seats 31 can be moved back and reset.

[0052] like Figure 2-6 As shown, the shift plate 56 is in an arc shape, and the outer diameter of the shift plate 56 is greater than the outer diameter of the driving gear 53 . During the rotation of the driving gear 53 , the shift plate 56 contacts the clamping seat 31 to fix the clamping seat 31 .

[0053] Specifically, during the rotation of the driving gear 53, the dial plate 56 contacts the driven rod 55 and pushes the driven rod 55 and the spring assembly 42 to move leftward, so that the knob 421 and the brush plate 41 are separated to the left and right and the knob 421 contacts the adjusting gear 44, so as to tighten the spring assembly 42; the driven rod 55 first contacts the side wall of the dial plate 56, and then contacts the arc-shaped end surface of the dial plate 56. By setting the dial plate 56 in an arc shape, during the rotation of the driving gear 53, the arc-shaped end surface of the dial plate 56 will block one end of the driven rod 55 for a period of time, providing more time for the tightening of the spring. During this process, the teeth on the ring side of the driving gear 53 contact the clamp seat 31 and drive the clamp seat 31 to approach the brush plate 41;

[0054] The spring assembly 42 is pushed by the push spring 54 to move closer to the brush plate 41, so that the knob 421 is separated from the adjusting gear 44 and contacts and meshes with the brush plate 41, and the check pawl 46 is separated from the adjusting gear 44, and the knob 421 is no longer checked. The spring assembly 42 releases energy to drive the knob 421 to rotate, and the knob 421 drives the brush plate 41 to move forward, so that the weldment on the clamp seat 31 is cleaned. During the cleaning process, since the clamp seat 31 remains in a fixed position, the brush plate 41 can be stably contacted with the weldment, thereby improving the cleaning effect.

[0055] As the driving gear 53 continues to rotate, the paddle 56 contacts the driven rod 55 again, and pushes the driven rod 55 and the spring assembly 42 to move leftward and reset, so that the knob 421 is separated from the brush plate 41, and then the brush plate 41 moves backward and resets under the pull of the reset spring 43; during the backward movement of the brush plate 41, the weldment can be brushed and cleaned again, further improving the cleaning effect;

[0056] The driving gear 53 continues to rotate, and the teeth on the ring side of the driving gear 53 contact the clamp seat 31 again, driving the clamp seat 31 to move until the two welded parts are in contact, and then the welding work of the welded parts can be carried out; during the welding process, the arc-shaped end surface of the paddle 56 always blocks the driven rod 55 to prevent the clockwork assembly 42 from moving rightward;

[0057] During the welding process and the cooling process of the weld after welding, the heat on the weld is transferred to the temperature-changing element 51 through the heat-conducting sheet 52, causing the temperature-changing element 51 to deform due to the heat. After the temperature-changing element 51 is deformed, it pushes the ratchet plate 45 to move backward, driving the adjusting gear 44 to rotate. The adjusting gear 44 drives the knob 421 to rotate, tightening the spring assembly 42 so that the spring assembly 42 can be reused.

[0058] Embodiment 2

[0059] like Figure 1 As shown, in contrast to Example 1, another embodiment of the present invention is that the cleaning mechanism 4 further comprises a receiving groove 47 provided on the machine body 1 , and the receiving groove 47 is located below the clamping seat 31 .

[0060] Specifically, the receiving groove 47 is located directly below the area between the two clamping seats 31. The receiving groove 47 is used to receive impurities brushed off during the cleaning process. When the brush plate 41 moves forward to brush and clean the weldment, the brushed impurities fall downward into the receiving groove 47. By setting the receiving groove 47 to collect the impurities, the machine body 1 as a whole can be kept clean.

[0061] Working principle: Initially, the two clamping seats 31 are away from each other, the brush plate 41 is located at the rear side of the clamping seat 31, the welding head 2 is located at the top, the dial plate 56 pushes the driven rod 55 and the clockwork assembly 42 to move left, the knob 421 is separated from the brush plate 41 and the knob 421 is in contact with the adjusting gear 44;

[0062] When welding the weldment, first place the two weldments on the two clamping seats 31 respectively, move the clamp 32 downward, press and fix the weldments on the clamping seats 31, and complete the clamping work of the weldments;

[0063] The driving gear 53 is started to rotate. During the rotation of the driving gear 53, the teeth on the ring side of the driving gear 53 contact the clamping seat 31 and drive the clamping seat 31 to approach the brush plate 41;

[0064] When the two weldments move close to the brush plate 41, as the driving gear 53 continues to rotate, the teeth on the ring side of the driving gear 53 separate from the clamp seat 31, and no longer drive the clamp seat 31 to move, and the arc-shaped end surface of the paddle 56 contacts the clamp seat 31, squeezing the clamp seat 31 to generate friction, so that the clamp seat 31 remains in a fixed position. At this time, the spacing between the two weldments is consistent with the size of the brush plate 41;

[0065] As the driving gear 53 continues to rotate, the paddle 56 separates from the driven rod 55. Without the obstruction of the paddle 56, the spring assembly 42 approaches the brush plate 41 under the push of the push spring 54, so that the knob 421 separates from the adjusting gear 44 and contacts and meshes with the brush plate 41, and the non-return pawl 46 separates from the adjusting gear 44, and no longer prevents the knob 421 from returning. The spring assembly 42 releases energy to drive the knob 421 to rotate, and the knob 421 drives the brush plate 41 to move forward to scrub and clean the weldment. During the cleaning process, since the clamp seat 31 remains in place, the brush plate 41 can be ensured to be in stable contact with the weldment, thereby improving the scrubbing and cleaning effect.

[0066] The driving gear 53 continues to rotate, the dial plate 56 contacts the driven rod 55 again, and pushes the driven rod 55 and the spring assembly 42 to move leftward and reset, so that the knob 421 is separated from the brush plate 41, and then the brush plate 41 moves backward and resets under the pull of the reset spring 43; during the backward movement of the brush plate 41, the weldment can be brushed and cleaned again to further improve the cleaning effect; at this time, the brush plate 41 moves to the rear side of the weldment to avoid interference with the fitting action of the two weldments;

[0067] The driving gear 53 continues to rotate, and the teeth on the ring side of the driving gear 53 contact the clamping seat 31 again, driving the clamping seat 31 to continue to move until the two welded parts are attached;

[0068] The welding head 2 is started to move downward, and the two welded parts are welded together, so that the welding work is completed; during welding, the arc-shaped end surface of the paddle 56 always blocks the driven rod 55 to prevent the clockwork assembly 42 from moving rightward;

[0069] During the welding process and the cooling process of the weldment after welding, the heat on the weldment is transferred to the temperature-changing element 51 through the heat-conducting sheet 52, causing the temperature-changing element 51 to deform due to the heat. After the temperature-changing element 51 is deformed, it pushes the ratchet plate 45 to move backward, driving the adjusting gear 44 to rotate. The adjusting gear 44 drives the knob 421 to rotate, tightening the spring assembly 42 so that the spring assembly 42 can be reused.

[0070] After taking away the welded weldment, repeat the above actions and continue the next welding work. In this way, it can be reused. During the working process of the welding robot, cleaning and welding work are integrated, the heat generated during welding is reused, and the clockwork assembly is tightened to store energy, thereby providing the brush plate 41 with driving force for cleaning work. There is no need to set up an additional electric drive system for cleaning work, which saves energy consumption and reduces the cost of use; by setting the clamping mechanism 3, the cleaning mechanism 4 and the control mechanism 5 to cooperate with each other, when the clamping seat 31 moves and drives the weldment to fit, the brush plate 41 automatically moves back and forth to brush and clean the weldment that is stationary in the middle, and the fitting and cleaning of the weldment are automatically carried out, with a high degree of automation, suitable for continuous work.

[0071] In addition, during the welding process, the weldment will generate welding stress due to local heating and cooling. When the welding stress is too large, it may cause the weldment to deform or even crack. Preheating can increase the overall temperature of the weldment before welding, reduce the temperature difference during welding to a certain extent, and thus reduce welding stress. Therefore, for some materials with good thermal conductivity, such as copper and aluminum, preheating can reduce the heat loss rate during welding, so that when performing spot welding and other welding operations, the temperature required for welding can be reached more quickly, thereby shortening the welding time and improving the welding efficiency. When the welding robot performs continuous welding, the temperature of the previous weldment after welding is transferred to the heat conductive sheet 52, so that the temperature of the heat conductive sheet 52 is higher. When the next weldment is placed on the clamp 31, the heat conductive sheet 52 can play a role in preheating the weldment, reducing the preheating time, thereby improving the welding effect and welding efficiency.

[0072] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic welding robot, comprising a machine body (1), wherein a welding head (2) is movably provided on the machine body (1), and characterized in that: It also includes a clamping mechanism (3) and a cleaning mechanism (4); The clamping mechanism (3) comprises: Two clamping seats (31) slidably arranged on the machine body (1); A clamp (32) provided on the clamp seat (31) for clamping the weldment; The cleaning mechanism (4) comprises a brush plate (41) slidably arranged on the machine body (1), bristles for cleaning weldments are arranged on the side wall of the brush plate (41), and the brush plate (41) is located between the two clamping seats (31).

2. An automatic welding robot according to claim 1, characterized in that: The cleaning mechanism (4) further comprises: A spring assembly (42) is slidably arranged on the machine body (1), wherein a knob (421) is arranged in the spring assembly (42), a gear member is fixedly connected to the end of the knob (421), the knob (421) is meshed with the brush plate (41) for transmission, and after the spring assembly (42) releases energy, the brush plate (41) is driven by the knob (421) to move to contact the weldment; A return spring (43) is provided on the machine body (1) and is used to drive the brush plate (41) to move back and return.

3. An automatic welding robot according to claim 2, characterized in that: The cleaning mechanism (4) further comprises: Rotating an adjusting gear (44) provided on the machine body (1), wherein the adjusting gear (44) meshes with the knob (421) for transmission; A ratchet plate (45) is slidably arranged on the machine body (1), the ratchet plate (45) is meshedly connected with the adjusting gear (44), and the ratchet plate (45) drives the adjusting gear (44) to rotate in one direction after moving.

4. The automatic welding robot according to claim 3, characterized in that: The cleaning mechanism (4) further comprises a non-return pawl (46) arranged on the clockwork assembly (42); the non-return pawl (46) prevents the adjusting gear (44) from rotating after contacting the adjusting gear (44).

5. The automatic welding robot according to claim 4, characterized in that: The invention also comprises a control mechanism (5), wherein the control mechanism (5) comprises: A temperature-changing element (51) is provided on the machine body (1), and an end of the temperature-changing element (51) is connected to the ratchet plate (45); A heat conducting sheet (52) is arranged on the clamping seat (31), and the other end of the heat conducting sheet (52) is connected to the temperature changing element (51).

6. The automatic welding robot according to claim 5, characterized in that: The control mechanism (5) also includes a driving gear (53) rotatably arranged on the machine body (1), wherein the driving gear (53) is meshingly connected with the clamping seat (31), and after the driving gear (53) rotates, it drives the two clamping seats (31) to move in opposite directions.

7. The automatic welding robot according to claim 6, characterized in that: The control mechanism (5) further comprises: A push spring (54) provided on the machine body (1) and used for pushing the clockwork assembly (42) close to the brush plate (41); A driven rod (55) fixedly connected to the clockwork assembly (42); A shift plate (56) is fixedly connected to the driving gear (53). During the rotation of the driving gear (53), the side wall of the shift plate (56) contacts the driven rod (55) to drive the clockwork assembly (42) away from the brush plate (41).

8. The automatic welding robot according to claim 7, characterized in that: The driving gear (53) is an incomplete gear, and the driven rod (55) and the driving gear (53) are staggered.

9. The automatic welding robot according to claim 8, characterized in that: The shift plate (56) is in an arc shape, and the outer diameter of the shift plate (56) is greater than the outer diameter of the driving gear (53). During the rotation of the driving gear (53), the shift plate (56) contacts the clamping seat (31) to fix the clamping seat (31).

10. The automatic welding robot according to claim 9, characterized in that: The cleaning mechanism (4) further comprises: a receiving groove (47) provided on the machine body (1), wherein the receiving groove (47) is located below the clamping seat (31).

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