A frame welding and polishing clamp

Abstract

The application provides a frame welding and polishing clamp, and belongs to the technical field of welding equipment. The technical problem that the existing frame welding and polishing clamp is difficult to balance the processing quality and efficiency is solved. The frame welding and polishing clamp comprises a tool holder, two positioning plates are fixedly connected to the tool holder, a spacing space is left between the two positioning plates, the top surfaces of the positioning plates are horizontally arranged, a vertical plate is connected below the spacing space, two moving seats are further connected to the tool holder, clamping blocks one horizontally arranged at the bottom are connected to the two moving seats, the two clamping blocks one are respectively located above the two positioning plates, when the clamping block one moves to one end of the positioning plate close to the spacing space, the vertical plate can be inserted into the spacing space upward and the top of the vertical plate exceeds the top surface of the positioning plate, and when the clamping block one moves to the other end of the positioning plate, the vertical plate can be inserted into the spacing space upward and the top surface of the vertical plate is flush with the top surface of the positioning plate. The application can balance the efficiency and processing quality of frame welding and polishing.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment technology and relates to a frame welding and grinding fixture. Background Technology

[0002] When welding workpieces, fixtures are often used to hold the parts to be welded to ensure a stable connection. For frame parts, they are usually formed by bending a strip of thin metal sheet to create an unclosed ring. The two free ends of the frame part are then welded together to achieve closure. During the welding process, special fixtures are needed to keep the frame part stable. After the welding is completed, the weld seam often needs to be ground and polished.

[0003] Patent application publication number CN104759890A discloses an automated production line and method for welding and milling door frames of rail vehicles. The method includes a work platform, which is equipped with a three-axis CNC positioner, a door frame pneumatic clamping unit, a tool buffer table, a manual grinding area, an automatic quality inspection unit, an automatic product sorting unit, a first door frame storage table, a first robot, a second door frame storage table, a welding machine, and a second robot. There are two sets of door frame pneumatic clamping units, which are respectively set on the three-axis CNC positioner. The three-axis CNC positioner controls the two sets of door frame pneumatic clamping units to rotate, and each door frame pneumatic clamping unit is used to fix the door frame to be processed.

[0004] The aforementioned device can clamp the frame by activating the clamping unit to facilitate precise welding. However, after welding, manual grinding of the welded area is still required, which is inefficient and makes it difficult to guarantee stable grinding quality. Therefore, those skilled in the art typically consider setting up additional automated grinding equipment and grinding fixtures, with a robot driving the machine to the grinding fixtures for precise grinding after processing. Summary of the Invention

[0005] In view of the above-mentioned problems in the existing technology, the present invention provides a frame welding and grinding fixture. The technical problem to be solved by the present invention is that the existing frame welding equipment is difficult to balance processing quality and efficiency.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A frame welding and grinding fixture includes a tooling frame, characterized in that two horizontally arranged strip-shaped positioning plates are fixedly connected to the tooling frame. The two positioning plates are opposite each other along their length direction and have a gap between them. The top surfaces of the positioning plates are both horizontally arranged. A vertical plate that can move up and down is connected directly below the gap. The positioning plates are perpendicular to the vertical plates along their length direction. Two movable seats that can reciprocate along the length direction of the positioning plates are also connected to the tooling frame. Each of the two movable seats is connected to a clamping block that is horizontally arranged and can reciprocate up and down. The two clamping blocks are respectively located directly above the two positioning plates. When the clamping block moves to one end of the positioning plate near the gap, the vertical plate can be inserted upward into the gap and the top of the vertical plate extends beyond the top surface of the positioning plate. When the clamping block moves to the other end of the positioning plate, the vertical plate can be inserted upward into the gap and the top surface of the vertical plate is flush with the top surface of the positioning plate.

[0008] The fixture is used to position the frame components for welding and grinding. Two horizontally opposed, strip-shaped positioning plates are installed on the fixture, creating a space between their opposite ends. A vertically movable plate is positioned below this space, perpendicular to the positioning plates. Two movable seats, moving along the length of the positioning plates, are also installed on the fixture. A clamping block, also vertically movable and opposite to the top surface of the positioning plates, is mounted on each movable seat. When clamping an unwelded frame component, one free end of the component is placed on a positioning plate. Since the vertical plate extends beyond the top surface of the positioning plates, the free end of the component is positioned against the side of the vertical plate. Then, the clamping block is moved downwards to press and fix the free end of the component. The vertical plate can then be controlled to... The frame piece is lowered and reset. After aligning the two free ends of the frame piece and controlling the other clamping block to move down, the other end of the frame piece is pressed down. Welding at this point ensures shape stability and welding quality. After welding, there is no need to change the fixture to improve efficiency. The moving seat can drive the clamping block to move away from the gap space, keeping the clamping block taut on the frame piece to prevent deformation during the process. After the clamping block moves away from the gap space, it can avoid the larger grinding wheel component during grinding, thus avoiding interference. At the same time, the vertical plate moves upward again until the top surface is flush with the top surface of the positioning plate. In this way, the vertical plate also provides support for the frame piece at the weld, effectively avoiding the dents caused by grinding thin plates and greatly improving the smoothness of grinding, thereby balancing the efficiency of welding and grinding and the processing quality.

[0009] In the aforementioned frame welding and grinding fixture, the movable base is also connected to a second clamping block that can reciprocate in a direction perpendicular to the positioning plate. The second clamping block is opposite to one side of the positioning plate, and there is a gap between the first clamping block and that side of the positioning plate. In this way, the second clamping block can clamp the flange of the frame component from the side, so that the flange of the frame component can accurately fit and abut against the side of the positioning plate, thereby making the clamping position of the frame component more stable and precise, which is beneficial to ensuring the quality of subsequent welding and grinding.

[0010] In the aforementioned frame welding and grinding fixture, the side of the vertical plate closest to the second clamping block is flush with the corresponding side of the positioning plate, and the top of this side of the vertical plate is chamfered. This allows the vertical plate to contact the inner edge of the frame component's flange during grinding, providing support. The chamfer at the top of the vertical plate's side provides guidance as it rises, preventing direct rigid contact between the vertical plate and the frame component's flange due to errors, thus ensuring the processing quality of the frame component.

[0011] In the aforementioned frame welding and grinding fixture, the top surface of the other side of the positioning plate has a receiving groove that runs through the length of the positioning plate. This allows the other flange of the frame component to be concealed within the receiving groove during clamping. For profiles where the other flange is not on the side of the frame component, the positioning plates on both sides of the receiving groove can provide sufficient support for the frame component, ensuring the final positioning stability of the frame component and guaranteeing processing quality.

[0012] In the aforementioned frame welding and grinding fixture, the edge of the top surface of the positioning plate near the clamping block 2 is chamfered or has a clearance groove along the length of the positioning plate. The flanges on both sides of the frame component are often achieved through a bending process, and the bends are not absolute right angles. This prevents the edge of the positioning plate from interfering with the corner of the inner wall of the frame component, thus allowing the inner wall of the frame component to fully fit against the top surface of the positioning plate.

[0013] In the aforementioned frame welding and grinding fixture, both clamping block one and clamping block two are wedge-shaped, with the tips of clamping block one and clamping block two facing each other. This design reduces the space occupied by the clamping blocks near the inter-space during clamping, thus preventing interference from welding tools and grinding wheels when processing the frame components in the inter-space, ensuring smooth processing.

[0014] In the aforementioned frame welding and grinding fixture, the movable seat is located on one side of the positioning plate in the horizontal direction. A vertically arranged cylinder is connected to the movable seat, and the output end of the cylinder is connected to a cantilever extending towards the side where the positioning plate is located. The clamping block is fixed to the cantilever. In this way, the clamping block moves up and down through the cantilever driven by the cylinder. The cantilever helps to reduce the space occupied in the area above the positioning plate, thereby reducing the possibility of interference with grinding equipment during processing.

[0015] In the aforementioned frame welding and grinding fixture, a horizontally arranged cylinder two is also connected to the movable seat. The cylinder two is located directly below the positioning plate, and the clamping block two is connected to the output end of the cylinder two. In this way, the cylinder two can make full use of the space below the positioning plate, realize the driving of the clamping block two, and will not affect the placement of the frame parts or the movement of the clamping block one, resulting in a more compact structure.

[0016] In the aforementioned frame welding and grinding fixture, the bottom of the positioning plate is fixed to the tooling frame by at least two support plates spaced apart along the length of the positioning plate, with one of the support plates positioned close to the space. This ensures stable support for the positioning plate while providing more direct support to the end of the positioning plate closest to the space, guaranteeing the structural strength of that end and preventing deformation under pressure, thereby ensuring processing quality.

[0017] In the aforementioned frame welding and grinding fixture, the second cylinder is located between two adjacent support plates. This allows the support plates to control the stroke of the moving seat by limiting the movement of the second cylinder along with the moving seat.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] This frame welding and grinding fixture can meet the different clamping requirements of frame welding and grinding according to the process, so that the frame parts do not need to be changed during the processing. At the same time, the frame parts can maintain shape stability during welding and grinding, which is conducive to balancing processing efficiency and quality. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0021] Figure 2 yes Figure 1 Enlarged view of part A in the image.

[0022] Figure 3 This is a three-dimensional structural schematic diagram from another angle of this embodiment.

[0023] Figure 4 This is a three-dimensional structural diagram of the frame component placement state in this embodiment.

[0024] Figure 5 This is a three-dimensional schematic diagram of the state before welding and clamping in this embodiment.

[0025] Figure 6 yes Figure 5 Enlarged view of part B in the image.

[0026] Figure 7 This is a three-dimensional schematic diagram of the state before polishing in this embodiment.

[0027] In the diagram, 1. Tooling rack;

[0028] 2. Positioning plate; 21. Receiving groove; 22. Leaving groove;

[0029] 3. Interval space; 4. Vertical plate; 5. Movable seat; 6. Clamping block one; 7. Clamping block two; 8. Cylinder one; 9. Cantilever; 10. Cylinder two; 11. Support plate. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] like Figure 1-7As shown, this frame welding and grinding fixture includes a fixture 1 for positioning the frame parts. Two horizontally arranged, strip-shaped positioning plates 2 are fixedly connected to the fixture 1. The top surfaces of the positioning plates 2 are horizontally arranged, and the two positioning plates 2 are opposite each other along their length with a gap 3 between them. A vertical plate 4 that can move up and down is connected directly below the gap 3. The vertical plate 4 is driven by a cylinder vertically fixed to the fixture 1. The positioning plates 2 are perpendicular to the vertical plate 4 along their length. Two movable seats 5 that can reciprocate along the length of the positioning plates 2 are also connected to the fixture 1. The base 5 is driven by a cylinder fixed to the tooling frame 1. Each of the two movable bases 5 is connected to a clamping block 6 with a horizontally arranged bottom surface that can reciprocate up and down. The two clamping blocks 6 are located directly above the two positioning plates 2. When clamping the frame, the two clamping blocks 6 move to one end of the positioning plate 2 near the gap 3, and the vertical plate 4 can be inserted upwards into the gap 3 and extend beyond the top surface of the positioning plate 2. When grinding the frame, the two clamping blocks 6 move to the other end of the positioning plate 2, and the vertical plate 4 can move upwards until its top surface is flush with the top surface of the positioning plate 2. The tooling frame 1 is used to position the frame components to facilitate welding and grinding. Furthermore, the movable base 5 is also connected to a clamping block 7 that can reciprocate in a direction perpendicular to the positioning plate 2. The clamping block 7 is opposite one side of the positioning plate 2, and there is a gap between the clamping block 3 and that side of the positioning plate 2. The side edge of the vertical plate 4 near the clamping block 7 is flush with the corresponding side edge of the positioning plate 2, and the top of this side edge of the vertical plate 4 is chamfered. The top surface of the other side of the positioning plate 2 has a receiving groove 21 that runs through the length of the positioning plate 2, and the edge of the top surface of the positioning plate 2 near the clamping block 7 has a clearance groove 22 that runs along the length of the positioning plate 2. Preferably, both the clamping block 6 and the clamping block 7 are wedge-shaped, with the tips of the two clamping blocks 6 facing each other and the tips of the two clamping blocks 7 facing each other.

[0032] like Figure 1-5 As shown, in the aforementioned frame welding and grinding fixture, the movable seat 5 is located on one side of the positioning plate 2 in the horizontal direction. A vertically arranged cylinder 8 is connected to the movable seat 5. The output end of the cylinder 8 is connected to a cantilever 9 extending towards the side where the positioning plate 2 is located. A clamping block 6 is fixedly connected to the cantilever 9. A horizontally arranged cylinder 10 is also connected to the movable seat 5. The cylinder 10 is located directly below the positioning plate 2. A clamping block 7 is connected to the output end of the cylinder 10. The bottom of the positioning plate 2 is fixedly connected to the tooling frame 1 by at least two support plates 11 arranged at intervals along the length of the positioning plate 2. One support plate 11 is arranged close to the interval space 3, and the cylinder 10 is located between two adjacent support plates 11.

[0033] Working process: Before clamping the frame component, clamping block 6 and clamping block 7 are both moved by the movable seat 5 and positioned close to the side where the interval space 3 is located. The vertical plate 4 moves upward and extends beyond the top surface of the positioning plate 2. The operator places the frame component onto the two positioning plates 2, and supports the two free ends of the frame component on the two positioning plates 2 respectively. Then, the end face of one of the free ends is adjusted to abut against the side of the vertical plate 4 as a welding reference, and the corresponding clamping blocks 6 and 7 are moved toward the frame component to form a weld on the free end. Clamping, then controlling the vertical plate 4 to move down and reset, then adjusting the other free end of the frame piece along the top surface of the positioning plate 2 to align, and controlling the other clamping block 6 and clamping block 7 to clamp; when grinding is performed after welding, the two moving seats 5 move back to back and drive the clamping block 6 and clamping block 7 to move away from each other, while controlling the vertical plate 4 to move up so that the top of the vertical plate 4 is flush with the top surface of the positioning plate 2 to form an inner support for the welding position of the frame piece, so that the outer grinding wheel presses down to grind so that the frame piece will not deform and affect the processing quality.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A frame welding and grinding fixture, comprising a fixture (1) for positioning frame parts, characterized in that, Two horizontally arranged strip-shaped positioning plates (2) are fixedly connected to the tooling frame (1). The two positioning plates (2) are opposite each other along the length direction and have a gap space (3) between them. The top surfaces of the positioning plates (2) are both horizontally arranged. A vertical plate (4) that can move up and down is connected directly below the gap space (3). The positioning plates (2) are perpendicular to the vertical plate (4) along the length direction. Two movable seats (5) that can move back and forth along the length direction of the positioning plates (2) are also connected to the tooling frame (1). Each of the two movable seats (5) is connected to a clamping block (6) with a horizontally arranged bottom surface that can move up and down. The two clamping blocks (6) are located directly above the two positioning plates (2). When the clamping blocks (6) move to the positioning plate (2) and are close to the gap space (3), When the vertical plate (4) is at one end of the positioning plate (2), it can be inserted into the gap space (3) and extend beyond the top surface of the positioning plate (2). When the clamping block (6) moves to the other end of the positioning plate (2), the vertical plate (4) can move upward and make the top surface of the vertical plate (4) flush with the top surface of the positioning plate (2). The moving seat (5) is also connected to a clamping block (7) that can reciprocate in a direction perpendicular to the positioning plate (2). The clamping block (7) is opposite to one side of the positioning plate (2). There is a gap between the clamping block (6) and the side of the positioning plate (2). The side of the vertical plate (4) near the clamping block (7) is flush with the corresponding side of the positioning plate (2). The top of the side of the vertical plate (4) is chamfered.

2. The frame welding and grinding fixture according to claim 1, characterized in that, The top surface of the other side of the positioning plate (2) has a receiving groove (21) that runs through the length of the positioning plate (2).

3. The frame welding and grinding fixture according to claim 1, characterized in that, The edge of the top surface of the positioning plate (2) near the clamping block 2 (7) is chamfered or has a relief groove (22) along the length of the positioning plate (2).

4. The frame welding and grinding fixture according to claim 1, 2, or 3, characterized in that, Both clamping block one (6) and clamping block two (7) are wedge-shaped, with the tips of the two clamping blocks one (6) facing each other and the tips of the two clamping blocks two (7) facing each other.

5. The frame welding and grinding fixture according to claim 1, 2, or 3, characterized in that, The movable seat (5) is located on one side of the positioning plate (2) in the horizontal direction. A vertically arranged cylinder (8) is connected to the movable seat (5). The output end of the cylinder (8) is connected to a cantilever (9) extending toward the side where the positioning plate (2) is located. The clamping block (6) is fixed to the cantilever (9).

6. The frame welding and grinding fixture according to claim 1, 2, or 3, characterized in that, The movable seat (5) is also connected to a horizontally arranged cylinder two (10), which is located directly below the positioning plate (2), and the clamping block two (7) is connected to the output end of the cylinder two (10).

7. The frame welding and grinding fixture according to claim 6, characterized in that, The bottom of the positioning plate (2) is fixed to the tooling frame (1) by at least two support plates (11) arranged at intervals along the length of the positioning plate (2), and one of the support plates (11) is arranged close to the interval space (3).

8. The frame welding and grinding fixture according to claim 7, characterized in that, The second cylinder (10) is located between two adjacent support plates (11).

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