A mine car cab body sheet metal welding equipment

Abstract

The application discloses a mine car cab body sheet metal welding equipment, and particularly relates to the technical field of welding, which comprises a base, a workpiece rotating tool, a welding mechanical arm and a follow-up pressure holding positioning unit, wherein the workpiece rotating tool is arranged on the base. The welding position of the edge of the spliced sheet metal of the mine car cab is switched in sequence, the two spliced sheet metal joint positions at the edge of the mine car cab are sequentially held by the pressure holding clamp body, the pressure holding clamp body is arranged adjacent to the welding gun, can move along the spliced edge of the sheet metal synchronously and follow the welding gun, so that the spliced sheet metal of the welding area is continuously held during the welding process, the joint state of the to-be-welded seam is real-timely constrained, compared with the traditional mode, the continuous holding of the whole welding seam can be realized, the interference of the fixed clamp on the welding operation space is eliminated, the continuous and smooth execution of the welding operation is ensured, and the welding processing efficiency and the welding seam forming quality are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a welding equipment for the sheet metal body of a mining truck cab. Background Technology

[0002] The mine car cab is the core control and safety protection component of mining engineering vehicles, providing operating space and structural protection for workers in underground or open-pit mines. Its shell is mainly composed of a steel frame skeleton and multiple thin-walled sheet metal panels spliced ​​together.

[0003] In the manufacturing process of mining truck cabs, the splicing and welding of the body sheet metal is one of the core forming processes. Usually, the various body sheet metal parts are first assembled and positioned on the pre-welded frame skeleton to complete the initial assembly and alignment. However, this stage only achieves the initial overlap and welding of the sheet metal parts, which cannot guarantee the tight fit and structural stability of the splicing joints. Therefore, subsequent welding operations are required to weld and fix adjacent sheet metal parts, as well as the sheet metal parts and the frame skeleton, to form a complete cab shell structure.

[0004] Currently, the welding work for the sheet metal of the mining truck cab mainly involves continuous fusion welding of the joints between two sheet metal pieces to fuse the sheet metal joints into one. However, the sheet metal of the car body is mostly thin-walled material. During the welding process, the vibration of the welding torch and the thermal stress fluctuations caused by the welding heat input can easily lead to local deformation and misalignment of the thin-walled sheet metal, resulting in defects such as uneven weld gaps and poor forming during the welding process. This directly affects the welding quality and the assembly accuracy of the shell. Therefore, in order to ensure the welding forming quality, it is usually necessary to use additional clamps to fix the sheet metal. However, traditional sheet metal positioning methods often employ multi-point fixed clamping structures, which can only apply clamping force at a few discrete points on the weld. This makes it impossible to obtain a continuous and stable pressing effect at the welding points. Not only is it difficult to ensure the pressing stability of the entire weld and effectively suppress sheet metal deformation throughout the welding process, but the clamping points of the fixed fixture also interfere with the working space of the welding torch, which can easily obstruct the movement path and welding posture of the welding torch, affecting the continuity and automation of the welding operation and hindering the improvement of welding processing efficiency and weld quality consistency.

[0005] Therefore, how to provide a sheet metal welding equipment for mining truck cabs is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sheet metal welding device for the cab of a mining truck.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A sheet metal welding device for a mine car cab includes a base, a workpiece rotation fixture, a welding robotic arm, and a follow-up pressing and positioning unit. The workpiece rotation fixture is set on the base to support the mine car cab to be welded and can drive the mine car cab to rotate to switch welding positions. The welding robotic arm is arranged corresponding to the welding positions and is used to perform welding operations on the spliced ​​sheet metal joints of the mine car cab. The follow-up clamping and positioning unit includes a traveling mechanism and a follow-up clamping assembly. The traveling mechanism is arranged on one side of the workpiece rotating fixture, and its power output end is provided with a movable seat. The follow-up clamping assembly is mounted on the movable seat and is used to clamp the two spliced ​​sheet metal joint parts at the edge of the mine car cab. It is configured to adapt to sheet metal splicing edges with different included angles. The traveling mechanism is used to drive the follow-up clamping assembly to move along the sheet metal splicing edge and move synchronously with the welding torch of the welding robot arm.

[0008] As a further embodiment of the present invention, the follow-up clamping assembly includes a cantilever rod, a support base, a support rod, a clamping body, a first driving member, and a second driving member; One end of the cantilever rod is rotatably mounted on the movable seat, and the other end is fixedly connected to the support seat. The support rod is rotatably mounted on the support seat, and its axis is arranged perpendicular to the axis of the cantilever rod. The first driving member is located at one end of the support rod and is used to drive the support rod to rotate around its own axis. The clamping clamp is fixedly connected to the other end of the support rod. The clamping body includes a fixed clamping arm and a movable clamping arm. One end of the movable clamping arm is hinged to the corresponding end of the fixed clamping arm, and the inner clamping surfaces of both are arranged with self-rotating rolling clamping elements. A fixed seat is provided on the hinge side of the clamping body, and a fixed block is slidably connected in the fixed seat. A fixed arm is hinged between the fixed block and the movable clamp arm. The second driving member is provided on the fixed seat and is used to drive the fixed block to move so as to drive the movable clamp arm to open and swing relative to the fixed clamp arm through the fixed arm.

[0009] As a further embodiment of the present invention, a second drive motor is provided on the top side of the movable seat, the output end of the second drive motor is connected to a first bevel gear, the end of the cantilever rod is connected to the bottom side of the movable seat through a bearing seat, and a second bevel gear is provided on it that meshes perpendicularly with the first bevel gear.

[0010] As a further embodiment of the present invention, the rolling clamping member includes a plurality of cavities respectively opened on the inner side of the fixed clamp arm and the movable clamp arm. A spring is fixedly connected to one end of the cavity, a connecting rod is connected to one end of the spring, one end of the connecting rod extends to the outside of the cavity and is provided with a U-shaped connecting frame, and a pressure roller is rotatably connected to the inner side of the U-shaped connecting frame through a rotating shaft.

[0011] As a further embodiment of the present invention, the first driving component includes a first driving motor, two synchronous pulleys and a synchronous belt. The first driving motor is fixed to the side wall of the support base, and its output end and the end of the support rod are respectively connected to the two synchronous pulleys. The synchronous belt is sleeved between the two synchronous pulleys. The second driving component includes a second driving motor, a screw, and two gears. The second driving motor is fixed to the side wall of the fixed base. The screw is rotatably connected to the fixed base through a bearing, and one end of the screw is connected to the output end of the second driving motor and the two gears respectively. The two gears mesh with each other. The fixed block is screwed onto the screw.

[0012] As a further embodiment of the present invention, one end of the support rod relative to the clamping body is connected to an air extraction pipe, an air suction chamber is provided on the inner side of the clamping body, and a central channel is provided inside the support rod, with the two ends of the central channel connected to the air extraction pipe and the air suction chamber, respectively.

[0013] As a further embodiment of the present invention, the workpiece rotation fixture includes a drive motor and a placement frame disposed on the top side of the base. The placement frame is disposed at the top output end of the drive motor and is detachably connected to the mine car cab.

[0014] As a further embodiment of the present invention, the walking mechanism includes an X-axis guide rail, a Y-axis guide rail and a Z-axis guide rail disposed on the top side of the base. The Y-axis guide rail is connected to the X-axis guide rail via a slide block, and the Z-axis guide rail is connected to the Y-axis guide rail via a slide block. The movable seat is disposed on the Z-axis guide rail slide block.

[0015] The technical effects and advantages provided by the present invention in the above technical solution are as follows: This invention involves sequentially switching the welding stations at the edges of the sheet metal splicing in the mine car cab, and using a clamping clamp to press the two spliced ​​sheet metal joints at the edges of the mine car cab. The clamping clamp is located near the welding torch and can move synchronously along the edge of the sheet metal splicing as the welding torch moves, thereby continuously applying pressure to the spliced ​​sheet metal in the welding area during the welding process, and constraining the joint state of the weld seam in real time. Compared with the traditional method, it can achieve continuous pressing of the entire weld seam, while eliminating the interference of the fixed fixture on the welding operation space, thus ensuring the continuous and smooth execution of the welding operation, and effectively improving the welding processing efficiency and weld formation quality. The clamping body of this invention can not only adapt its deflection posture according to the tilt angle of the splicing edge after the mine car cab is rotated and positioned, but also adjust the opening and closing angle according to the included angle of the splicing sheet metal on both sides of the edge. This allows it to adapt to the clamping operation of sheet metal splicing edges with different included angles and different spatial orientations, thereby ensuring the clamping reliability in the welding process of various edges and greatly improving the applicability of the equipment to the welding of sheet metal of different cab configurations. When the sheet metal surface has local unevenness, forming tolerances, or edge transition curves, the inner sliding structure of the clamping body of this invention can achieve floating adaptive clamping, avoiding damage or obstruction caused by rigid clamping, and further improving the adaptability and clamping stability to different sheet surface conditions. By setting an air suction chamber inside the clamping body, in conjunction with the central channel and the air extraction pipe, welding fumes generated near the welding point can be extracted in real time during the welding process when the clamping body moves synchronously with the welding torch. This enables the in-situ collection and directional export of harmful welding fumes, greatly improving the collection efficiency and purification effect of welding fumes. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is one of the overall structural schematic diagrams of the present invention; Figure 2 This is the second schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the follower clamping assembly of the present invention when it is located on the upper and lower sides of the mine car cab respectively; Figure 4 This is a schematic diagram of the structure of the follower clamping assembly of the present invention; Figure 5 This is a schematic diagram of the connection between the cantilever rod and the drive motor of the present invention; Figure 6 This is a schematic diagram of the internal structure of the fixing base of the present invention; Figure 7 This is a schematic diagram of the fixed clamp arm and the movable clamp arm of the present invention; Figure 8 This is a cross-sectional view of the support rod, fixed clamp arm, and movable clamp arm of the present invention. Figure 9 This is a schematic diagram of the connection structure between the pressure roller and the fixed clamp arm and the movable clamp arm of the present invention.

[0017] In the picture: 100. Base; 200. Workpiece rotation fixture; 201. Placement rack; 202. Drive motor one; 300. Welding robotic arm; 400. Walking mechanism; 401. Moving seat; 500. Cantilever rod; 501. Drive motor 2; 502. First bevel gear; 503. Second bevel gear; 600. Follow-up clamping assembly; 601. Support base; 602. Support rod; 603. Fixed clamp arm; 604. Movable clamp arm; 605. U-shaped connecting frame; 606. Pressure roller; 6021, Central channel; 6022, Suction pipe; 6023, Suction chamber; 6051, Connecting rod; 6052, Chamber groove; 6053, Spring; 700. First driving component; 800. Fixing base; 801. Fixing block; 802. Fixing arm; 900, Second drive unit. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 like Figures 1-3 As shown, the present invention provides a sheet metal welding equipment for a mine car cab, including a base 100, a workpiece rotation fixture 200, a welding robotic arm 300, and a follow-up pressing and positioning unit. The workpiece rotation fixture 200 is set on the base 100 to support the mine car cab to be welded, and can drive the mine car cab to rotate to switch welding positions. The welding robotic arm 300 is arranged corresponding to the welding positions and is used to perform welding operations on the spliced ​​sheet metal joints of the mine car cab. It should be noted that the free output end of the welding robot arm 300 is equipped with a welding torch, which is equipped with a welding wire feeding mechanism and a shielding gas supply mechanism. During the welding process, welding wire and welding shielding gas can be continuously supplied to complete the gas metal arc welding operation of sheet metal joints. These are all well known in the art, not all of which are shown in the figure, and are not the focus of the improvement of this invention. Therefore, they will not be described in detail.

[0020] The follow-up clamping and positioning unit includes a traveling mechanism 400 and a follow-up clamping assembly 600. The traveling mechanism 400 is arranged on one side of the workpiece rotary fixture 200, and its power output end is provided with a movable seat 401. The follow-up clamping assembly 600 is mounted on the movable seat 401 and is used to clamp the two spliced ​​sheet metal joint parts at the edge of the mine car cab. It is set to be able to adapt to sheet metal splicing edges with different included angles. The traveling mechanism 400 is used to drive the follow-up clamping assembly 600 to move along the sheet metal splicing edge and keep synchronous with the welding gun of the welding robot arm 300.

[0021] The workpiece rotation fixture 200 includes a drive motor 202 and a placement frame 201 disposed on the top side of the base 100. The placement frame 201 is disposed at the top output end of the drive motor 202 and is detachably connected to the mine car cab.

[0022] When clamping the workpiece, the mine car cab to be welded is hoisted and positioned above the placement frame 201. The bottom frame of the mine car cab is locked and fixed to the placement frame 201 with bolts and fasteners to ensure that there is no relative movement between the workpiece and the tooling during the welding operation. During the welding process, the drive motor 202 outputs rotational power to drive the placement frame 201 and the mine car cab on it to rotate around the vertical axis. Specifically, the rotation can be stepped according to a preset angle. It is preferred to switch the work position in 90° increments so that each sheet metal splicing edge on the periphery of the mine car cab is rotated to the welding position in sequence, corresponding to the working range of the welding robot arm 300. With the welding robot arm 300 tracking the weld seam and the synchronous following pressure of the follow-up pressure and positioning unit, the automated welding of the sheet metal joints on each side of the cab can be completed in sequence.

[0023] The traveling mechanism 400 includes an X-axis guide rail, a Y-axis guide rail and a Z-axis guide rail disposed on the top side of the base 100. The Y-axis guide rail is connected to the X-axis guide rail via a slide block, and the Z-axis guide rail is connected to the Y-axis guide rail via a slide block. The movable seat 401 is disposed on the slide block of the Z-axis guide rail.

[0024] By feeding forward and backward, moving left and right, and feeding up and down along the X-axis, Y-axis, and Z-axis guide rails, the position adjustment of the follow-up pressure positioning unit and its movement along the weld can be realized. During welding, the follow-up pressing and positioning unit is first driven to move to the target welding position, so that the pressing clamp on it presses against the two spliced ​​sheet metal joints at the edge of the mine car cab. Then, the traveling mechanism 400 outputs continuous feed motion along the extension direction of the sheet metal splicing edge, driving the pressing clamp to move along the splicing edge, and keeping synchronous with the welding gun at the end of the welding robot arm 300.

[0025] like Figures 4-9 As shown, the follow-up clamping assembly 600 includes a cantilever 500, a support base 601, a support rod 602, a clamping body, a first drive member 700, and a second drive member 900. One end of the cantilever 500 is rotatably mounted on the movable seat 401, and the other end is fixedly connected to the support seat 601. Specifically, a second drive motor 501 is provided on the top side of the movable seat 401, and the output end of the second drive motor 501 is connected to a first bevel gear 502. The end of the cantilever 500 is connected to the bottom side of the movable seat 401 through a bearing seat, and a second bevel gear 503 that meshes perpendicularly with the first bevel gear 502 is provided on it. The first bevel gear 502 is driven to rotate by the second drive motor 501, which in turn drives the meshing second bevel gear 503 to rotate. The second bevel gear 503 drives the cantilever rod 500 to rotate, which in turn causes the cantilever rod 500 to drive the support base 601 and the clamping clamp body to deflect as a whole. by Figure 1 Taking the corresponding workstation as an example, at this rotation angle, the walking direction of the clamping body is consistent with the extension direction of the vertical edge of the mine car cab, and it can make longitudinal feeding motion along the vertical splicing edge around the cab. by Figure 3 Taking the corresponding workstation as an example, when the cantilever rod 500 rotates 90° around its own axis in the forward or reverse direction, the walking direction of the clamping body is switched to the lateral direction, and it can make lateral feeding movements along the lateral splicing edge at the top or bottom of the mine car cab respectively.

[0026] The support rod 602 is rotatably mounted on the support base 601, and its axis is arranged perpendicular to the axis of the cantilever rod 500. The first driving member 700 is provided at one end of the support rod 602 and is used to drive the support rod 602 to rotate around its own axis. The clamping clamp is fixedly connected to the other end of the support rod 602. The clamping body includes a fixed clamping arm 603 and a movable clamping arm 604. One end of the movable clamping arm 604 is hinged to the corresponding end of the fixed clamping arm 603, and the inner clamping surfaces of both are arranged with self-rotating rolling clamping elements. A fixed base 800 is provided on the hinge side of the clamping body. A fixed block 801 is slidably connected inside the fixed base 800. A fixed arm 802 is hinged between the fixed block 801 and the movable clamping arm 604. A second driving member 900 is provided on the fixed base 800 and is used to drive the fixed block 801 to move so that the movable clamping arm 604 can swing open and close relative to the fixed clamping arm 603 through the fixed arm 802.

[0027] This device uses a workpiece rotary fixture 200 to sequentially switch the welding positions of the sheet metal splicing edges of the mine car cab. The clamping body is used to press the two splicing sheet metal joints at the edge of the mine car cab in sequence. The clamping body is located near the welding gun of the welding robot arm 300. It can move synchronously along the sheet metal splicing edge as the welding gun of the welding robot arm 300 moves, thereby continuously applying pressure to the splicing sheet metal in the welding area during the welding process and constraining the joint state of the weld seam in real time. Compared to the traditional multi-point fixed clamping and positioning method, the follow-up pressing structure adopted in this device design can realize continuous pressing of the entire weld seam, while eliminating the interference of fixed fixtures on the welding operation space, thereby ensuring the continuous and smooth execution of welding operations and effectively improving welding processing efficiency and weld formation quality. In addition, the clamping body of this device can not only adapt its deflection posture according to the tilt angle of the splicing edge after the mine car cab is rotated and positioned, but also adjust the opening and closing angle according to the included angle of the splicing sheet metal on both sides of the edge. This allows it to adapt to the clamping operation of sheet metal splicing edges with different included angles and different spatial orientations, thereby ensuring the clamping reliability in the welding process of various edges and greatly improving the applicability of the equipment to sheet metal welding of different cab configurations.

[0028] In this embodiment, the first driving component 700 includes a first driving motor, two synchronous pulleys and a synchronous belt. The first driving motor is fixed to the side wall of the support base 601, and its output end and the end of the support rod 602 are respectively connected to the two synchronous pulleys. The synchronous belt is sleeved between the two synchronous pulleys. Therefore, it can be seen that the first drive motor drives the support rod 602 to rotate via the synchronous pulley and synchronous belt, causing the support rod 602 to drive the clamping body to rotate. Figure 2 Taking the workstation shown as an example, when the mine car cab rotates to the welding workstation with the workpiece rotation fixture 200, in order to adapt to the tilt angle of the sheet metal splicing edge at the workstation, the first driving component 700 can drive the support rod 602 to deflect at the corresponding angle, so that the pressing working surface of the pressing clamp body matches the angle of the sheet metal splicing edge, ensuring that the fixed clamp arm 603 and the movable clamp arm 604 of the pressing clamp body can respectively press onto the splicing sheet metal on both sides of the edge, ensuring that the pressing force is effectively applied to the sheet metal joint, and achieving stable pressing of splicing edges with different tilt angles.

[0029] The second driving component 900 includes a second driving motor, a screw, and two gears. The second driving motor is fixed to the side wall of the fixed base 800. The screw is rotatably connected to the fixed base 800 through a bearing, and one end of the screw is connected to the output end of the second driving motor and the two gears respectively. The two gears mesh with each other. The fixed block 801 is screwed onto the screw.

[0030] The second drive motor drives the screw to rotate via gears, causing the screw to drive the fixed block 801 to slide back and forth within the fixed base 800. This allows the fixed block 801 to drive the movable clamp arm 604 to open and close relative to the fixed clamp arm 603 via the fixed arm 802. Figure 3 Taking the workstation shown as an example, when the clamping clamp performs clamping operation on the upper or lower edge of the mine car cab, the swing amplitude of the movable clamping arm 604 can be controlled by the second drive component 900 to adjust the opening and closing angle between the fixed arm 802 and the movable clamping arm 604, so that it can adapt to sheet metal splicing edges with different inner angles, ensuring that the rolling clamping parts on the inner side of the fixed clamping arm 603 and the movable clamping arm 604 can be correspondingly attached to the sheet metal plate surface on both sides of the edge, maintaining a stable clamping effect during the movement along the edge.

[0031] Example 2 like Figure 4 , Figure 6 , Figure 8 and Figure 9 As shown, the rolling clamping member includes several cavities 6052 respectively opened inside the fixed clamp arm 603 and the movable clamp arm 604. A spring 6053 is fixedly connected to one end of the cavity 6052. A connecting rod 6051 is connected to one end of the spring 6053. One end of the connecting rod 6051 extends to the outside of the cavity 6052 and is provided with a U-shaped connecting frame 605. A pressure roller 606 is rotatably connected to the inner side of the U-shaped connecting frame 605 through a rotating shaft.

[0032] The pressure roller 606 can adopt a rubber-coated wheel structure. While applying normal pressing force to the spliced ​​sheet metal, it can roll along the sheet metal surface as the pressing clamp moves. When there are local unevenness, forming tolerances, or edge transition surfaces on the sheet metal surface, the pressure roller 606 can generate axial floating due to the reaction force of the plate surface. Through the U-shaped connecting frame 605, the connecting rod 6051 is driven to retract in the cavity 6052. The compression spring 6053 stores energy. Under the action of its elastic restoring force, the pressure roller 606 always maintains elastic contact with the sheet metal surface, realizing floating adaptive pressing, avoiding damage or obstruction caused by rigid pressing, and further improving the adaptability and pressing stability to different plate surface conditions.

[0033] Example 3 like Figure 7 and Figure 8 As shown, the support rod 602 is connected to an air extraction pipe 6022 at one end relative to the clamping body, and an air suction chamber 6023 is provided on the inner side of the clamping body. The support rod 602 has a central channel 6021 inside, and the two ends of the central channel 6021 are connected to the air extraction pipe 6022 and the air suction chamber 6023, respectively.

[0034] Because the inner two clamp arms of the clamping body are respectively attached to the spliced ​​sheet metal on both sides of the edge during operation, and the whole body moves synchronously with the welding torch, the harmful fumes and welding dust generated by the melting of the welding wire during the welding process can be collected nearby. By setting an air suction chamber 6023 at the inner angle between the fixed arm 802 and the movable arm 604 of the clamping body, the air suction chamber 6023 is connected to the tail end exhaust pipe 6022 through the central channel 6021 inside the support rod 602. The exhaust pipe 6022 is connected to a negative pressure suction purification system. During the welding process, the clamping body moves synchronously with the welding torch to extract the welding fumes generated near the welding point in real time, thereby realizing the in-situ collection and directional export of the harmful welding fumes, which greatly improves the collection efficiency and purification effect of the welding fumes.

[0035] Working principle: The mine car cab to be welded is hoisted and positioned above the placement frame 201. After locking and fixing, the placement frame 201 and the mine car cab on it can be driven to rotate around the vertical axis at a preset angle, so that each sheet metal splicing edge around the mine car cab rotates sequentially to the welding station, corresponding to the working range of the welding robot arm 300. The welding robot arm 300 tracks the weld seam for welding, and simultaneously, the clamping clamps sequentially clamp the two splicing sheet metal joints at the edges of the mine car cab. The clamping clamps can adapt their deflection posture according to the tilt angle of the splicing edges after the mine car cab is rotated and positioned, and can also adjust their opening and closing angle according to the included angle between the splicing sheet metal on both sides of the edge. The welding torch, located near the welding robot arm 300, can move with the welding... The robotic arm 300 welding torch moves synchronously along the edge of the sheet metal splicing, continuously applying pressure to the spliced ​​sheet metal in the welding area during the welding process, constraining the joint state of the weld seam in real time. The pressure roller 606 structure set inside the clamp body can achieve floating adaptive pressure when there are local unevenness, forming tolerance, or edge transition surface on the sheet metal surface, avoiding damage or obstruction caused by rigid pressure. Through the suction chamber 6023 set inside, the suction system is connected to the negative pressure suction purification system through the central channel 6021 and the tail suction pipe 6022. During the welding process, the clamp body moves synchronously with the welding torch, and the welding fumes generated near the welding point are sucked in real time, realizing the in-situ collection and directional export treatment of harmful welding fumes.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sheet metal welding device for a mining truck cab body, characterized in that, The device includes a base (100), a workpiece rotation fixture (200), a welding robot arm (300), and a follow-up pressing and positioning unit. The workpiece rotation fixture (200) is set on the base (100) to support the mine car cab to be welded and can drive the mine car cab to rotate to switch welding positions. The welding robot arm (300) is arranged corresponding to the welding positions and is used to perform welding operations on the spliced ​​sheet metal joints of the mine car cab. The follow-up pressing and positioning unit includes a walking mechanism (400) and a follow-up clamping assembly (600). The walking mechanism (400) is arranged on one side of the workpiece rotary fixture (200), and its power output end is provided with a movable seat (401). The follow-up clamping assembly (600) is mounted on the movable seat (401) and is used to press the two spliced ​​sheet metal joint parts at the edge of the mine car cab. It is set to be able to adapt to sheet metal splicing edges with different included angles. The walking mechanism (400) is used to drive the follow-up clamping assembly (600) to move along the sheet metal splicing edge and move synchronously with the welding gun of the welding robot arm (300).

2. The sheet metal welding equipment for a mining car cab according to claim 1, characterized in that, The follow-up clamping assembly (600) includes a cantilever (500), a support base (601), a support rod (602), a clamping body, a first drive member (700), and a second drive member (900). One end of the cantilever rod (500) is rotatably mounted on the movable seat (401), and the other end is fixedly connected to the support seat (601). The support rod (602) is rotatably mounted on the support seat (601), and its axial direction is arranged perpendicular to the axial direction of the cantilever rod (500). The first driving member (700) is provided at one end of the support rod (602) and is used to drive the support rod (602) to rotate around its own axis. The clamping clamp is fixedly connected to the other end of the support rod (602). The clamping body includes a fixed clamping arm (603) and a movable clamping arm (604). One end of the movable clamping arm (604) is hinged to the corresponding end of the fixed clamping arm (603), and the inner clamping surfaces of both are arranged with self-rotating rolling clamping members. A fixed seat (800) is provided on the hinge side of the clamping body. A fixed block (801) is slidably connected inside the fixed seat (800). A fixed arm (802) is hinged between the fixed block (801) and the movable clamp arm (604). The second driving member (900) is provided on the fixed seat (800) and is used to drive the fixed block (801) to move so that the movable clamp arm (604) can swing relative to the fixed clamp arm (603) through the fixed arm (802).

3. The sheet metal welding equipment for a mining car cab according to claim 2, characterized in that, The top side of the movable seat (401) is provided with a second drive motor (501), the output end of the second drive motor (501) is connected to a first bevel gear (502), the end of the cantilever rod (500) is connected to the bottom side of the movable seat (401) through a bearing seat, and a second bevel gear (503) is provided on it, which meshes perpendicularly with the first bevel gear (502).

4. The sheet metal welding equipment for a mining car cab according to claim 2, characterized in that, The rolling clamping component includes several cavities (6052) respectively opened inside the fixed clamp arm (603) and the movable clamp arm (604). A spring (6053) is fixedly connected to one end of the cavity (6052), and a connecting rod (6051) is connected to one end of the spring (6053). One end of the connecting rod (6051) extends to the outside of the cavity (6052) and is provided with a U-shaped connecting frame (605). A pressure roller (606) is rotatably connected to the inside of the U-shaped connecting frame (605) through a rotating shaft.

5. The sheet metal welding equipment for a mining car cab according to claim 2, characterized in that, The first driving component (700) includes a first driving motor, two synchronous pulleys and a synchronous belt. The first driving motor is fixed to the side wall of the support base (601), and its output end and the end of the support rod (602) are respectively connected to the two synchronous pulleys. The synchronous belt is sleeved between the two synchronous pulleys. The second driving component (900) includes a second driving motor, a screw and two gears. The second driving motor is fixed to the side wall of the fixed base (800). The screw is rotatably connected to the fixed base (800) through a bearing, and one end of the screw is connected to the output end of the second driving motor and the two gears respectively. The two gears mesh with each other. The fixed block (801) is screwed onto the screw.

6. The sheet metal welding equipment for a mining car cab according to claim 2, characterized in that, The support rod (602) is connected to an air extraction pipe (6022) at one end relative to the clamping body. An air suction chamber (6023) is provided on the inner side of the clamping body. A central channel (6021) is provided inside the support rod (602). The two ends of the central channel (6021) are respectively connected to the air extraction pipe (6022) and the air suction chamber (6023).

7. The sheet metal welding equipment for a mining car cab according to claim 1, characterized in that, The workpiece rotation fixture (200) includes a drive motor (202) and a placement frame (201) disposed on the top side of the base (100). The placement frame (201) is disposed at the top output end of the drive motor (202) and is detachably connected to the mine car cab.

8. The sheet metal welding equipment for a mining car cab according to claim 1, characterized in that, The walking mechanism (400) includes an X-axis guide rail, a Y-axis guide rail and a Z-axis guide rail disposed on the top side of the base (100). The Y-axis guide rail is connected to the X-axis guide rail via a slide block, and the Z-axis guide rail is connected to the Y-axis guide rail via a slide block. The moving seat (401) is disposed on the Z-axis guide rail slide block.

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