Welding positioning tool for precise sheet metal box body

Abstract

The utility model discloses a welding positioning tool for a precise sheet metal box, and belongs to the technical field of sheet metal machining. Comprising a horizontal workbench, a metal plate workpiece inversely buckled on the horizontal workbench, and two groups of inner supporting seats slidably connected to the horizontal workbench in a first direction and a second direction which are perpendicular to each other; the inner supporting blocks on the two sets of inner supporting seats can synchronously move to be supported on the side walls of the periphery of the metal plate workpiece, outer clamping blocks capable of moving opposite to the inner supporting blocks are arranged on the horizontal workbench, and the corresponding outer clamping blocks and the corresponding inner supporting blocks can clamp side plates of the metal plate workpiece. The bottom of the horizontal workbench is provided with a driving mechanism capable of driving the same set of inner supporting seats to synchronously move in the same direction or back to back. According to the welding and positioning tool for the precise sheet metal box, sheet metal workpieces with right-angle bends and arc bends can be accurately corrected and positioned in the welding process, and the welding precision and the yield are improved.

Description

Technical Field

[0001] This utility model belongs to the field of sheet metal processing technology, and in particular relates to a welding positioning fixture for a precision sheet metal box. Background Technology

[0002] Welding is a crucial step in the production of sheet metal enclosures. Existing welding processes face numerous challenges when handling sheet metal workpieces with right-angle bends and arc bends. For example, the lack of effective fixed-position connections at the corners of the bent workpiece during welding makes it difficult to precisely control the overall length and width dimensions after bending. This not only results in low precision standards for the welded workpiece but also a low yield rate, severely impacting production efficiency and product quality, increasing production costs and wasting resources. Furthermore, the instability of the workpiece's position during welding can lead to welding deformation and uneven welds, further reducing product quality and reliability.

[0003] Therefore, there is an urgent need for a positioning fixture that can accurately position and stabilize sheet metal workpieces to improve the welding accuracy and yield of sheet metal boxes, and ensure product quality and production efficiency. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a precision sheet metal box welding positioning fixture, which can accurately correct and position sheet metal workpieces with right-angle bends and arc bends during the welding process, thereby improving welding accuracy and yield.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a welding positioning fixture for a precision sheet metal box, including a horizontal worktable, a sheet metal workpiece inverted on the horizontal worktable, and two sets of inner support seats that are slidably connected to the horizontal worktable along a first direction and a second direction that are perpendicular to each other.

[0006] The inner support blocks on the two sets of inner support seats can move synchronously to support the four sides of the sheet metal workpiece, and the horizontal worktable is provided with an outer clamping block that can move in the opposite direction to the inner support block. The corresponding outer clamping block and the inner support block can clamp the side plate of the sheet metal workpiece.

[0007] The bottom of the horizontal worktable is equipped with a drive mechanism that can drive the same group of inner support seats to move synchronously in opposite directions or in opposite directions.

[0008] Optionally, the driving mechanism includes a force-bearing rod and a first cylinder with its output end connected to the middle of the force-bearing rod. The first cylinder can drive the force-bearing rod to move along a first direction or a second direction.

[0009] The force-bearing rod is provided with two limiting rods symmetrically arranged along the first cylinder. Each limiting rod has a guide groove opened along a third direction. One end of the inner support is slidably connected to the guide groove. The guide grooves on the two limiting rods are symmetrically arranged along the first cylinder. The movement trajectory of the inner support relative to the guide groove does not coincide with or perpendicular to the first direction and the second direction.

[0010] Furthermore, when the first cylinder drives the force-bearing rod to move in the first direction, the inner support can move in the second direction; when the first cylinder drives the force-bearing rod to move in the second direction, the inner support can move in the first direction.

[0011] Optionally, the horizontal worktable is provided with a number of limiting grooves along the first direction and the second direction, and the inner support is slidably embedded in the limiting grooves.

[0012] Optionally, the limiting slide groove has an I-shaped cross-section in the third direction. The inner support includes an inner support shaft slidably embedded in the limiting slide groove and two bearings sleeved on the inner support shaft. The inner support block is connected to the inner support shaft. A section of the inner support shaft embedded in the middle of the limiting slide groove has a rounded rectangle or rectangle cross-section. The bearings are rotatably connected to the side wall of the limiting slide groove, and the two bearings are clamped at the upper and lower ends of the limiting slide groove along the third direction.

[0013] Optionally, the inner support shaft includes a limiting shaft slidably connected to the limiting groove and a free shaft rotatably connected to the end of the limiting shaft. The free shaft is coaxially distributed with the limiting shaft and is slidably connected to the guide groove.

[0014] Optionally, the outer clamping block is driven by a second cylinder.

[0015] Optionally, the outer clamping block and the inner support block are provided with rigid plastic on the side facing the sheet metal workpiece.

[0016] Optionally, the horizontal worktable is provided with an inner support frame that can support the bottom of the sheet metal workpiece and a vertical clamping device that can rotate above the inner support frame and press down on the sheet metal workpiece.

[0017] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: When the sheet metal workpiece is upside down on the horizontal worktable, the converging inner support block can support the sheet metal workpiece from the inner four sides of the workpiece under the drive of the drive mechanism. Combined with the opposing clamping of the outer clamping block and the inner support block, the side plate on the sheet metal workpiece is fixed in multiple directions and angles, thereby correcting the position of the welding angle required for the sheet metal workpiece. At the same time, it effectively restricts the degree of freedom of the sheet metal workpiece during the processing, greatly improves the stability of the clamping, and reduces the processing error caused by the shaking and displacement of the sheet metal workpiece. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the welding positioning fixture for the precision sheet metal box in a preferred embodiment of the present invention;

[0020] Figure 2 This is a lower view of the welding positioning fixture for the precision sheet metal box in a preferred embodiment of the present invention.

[0021] Figure 3 This is a side view of the welding positioning fixture for the precision sheet metal box in a preferred embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the sheet metal workpiece when it is upside down on the horizontal worktable in a preferred embodiment of the present invention;

[0023] The components include: 1. Horizontal worktable; 101. Limiting slide groove; 2. Sheet metal workpiece; 201. Side plate; 3. Inner support seat; 301. Inner support block; 302. Inner support shaft; 3021. Limiting shaft; 3022. Free shaft; 303. Bearing; 4. Outer clamping block; 5. Force rod; 6. First cylinder; 7. Limiting rod; 701. Guide groove; 8. Second cylinder; 9. Inner support frame; 10. Vertical clamping device. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0025] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] like Figures 1-4 As shown, a welding positioning fixture for a precision sheet metal box includes a horizontal worktable 1, a sheet metal workpiece 2 inverted on the horizontal worktable 1, and two sets of inner support seats 3 slidably connected to the horizontal worktable 1 along a first direction and a second direction perpendicular to each other; the inner support blocks 301 on the two sets of inner support seats 3 can move synchronously to support the four sides of the sheet metal workpiece 2, and the horizontal worktable 1 is provided with an outer clamping block 4 that can move towards the inner support block 301, and the corresponding outer clamping block 4 and inner support block 301 can clamp the side plate 201 of the sheet metal workpiece 2; wherein, the bottom of the horizontal worktable 1 is provided with a driving mechanism that can drive the same set of inner support seats 3 to move synchronously towards or away from each other.

[0027] Specifically, two sets of inner support seats 3 are slidably connected to the horizontal worktable 1 along mutually perpendicular first and second directions. Under the drive of the drive mechanism, the inner support blocks 301 on the two sets of inner support seats 3 can exhibit a tendency to converge inward and expand outward. When the inner support blocks 301 expand outward to the maximum distance, the support points formed by the outer sides of several inner support blocks 301 correspond to the inner wall of the sheet metal workpiece 2 (where all parts are in standard positions). That is, when the sheet metal workpiece 2 is upside down on the horizontal worktable 1, the converged inner support blocks 301 can support the sheet metal workpiece 2 from the four sides inside the sheet metal workpiece 2 under the drive of the drive mechanism. Combined with the opposing clamping of the outer clamping block 4 and the inner support block 301, a multi-directional and multi-angle fixation of the side plate 201 on the sheet metal workpiece 2 is formed, thereby correcting the position of the required welding angle of the sheet metal workpiece 2. At the same time, it effectively restricts the degree of freedom of the sheet metal workpiece 2 during the processing, greatly improves the stability of the clamping, and reduces the processing error caused by the shaking and displacement of the sheet metal workpiece 2.

[0028] Furthermore, such as Figure 2 , Figure 3As shown, the driving mechanism includes a force-bearing rod 5 and a first cylinder 6 whose output end is connected to the middle of the force-bearing rod 5. The first cylinder 6 can drive the force-bearing rod 5 to move along a first direction or a second direction. Two limiting rods 7 are provided on the force-bearing rod 5, which are symmetrically arranged along the first cylinder 6. Each limiting rod 7 has a guide groove 701 opened along a third direction. One end of the inner support 3 is slidably connected to the guide groove 701. The guide grooves 701 on the two limiting rods 7 are symmetrically arranged along the first cylinder 6, and the movement trajectory of the inner support 3 relative to the guide groove 701 does not coincide with or perpendicular to the first direction or the second direction.

[0029] In this technical solution, the first direction, the second direction, and the third direction correspond to the X-axis, Y-axis, and Z-axis in a spatial rectangular coordinate system, respectively, and are mutually perpendicular. In this technical solution, the force-bearing rod 5 and the limiting rod 7, which can move along the first direction, correspond to the inner support 3, which can move along the second direction. That is, one end of the inner support 3, which can move along the second direction, is slidably connected to the guide groove 701 on the limiting rod 7, which can move along the first direction. Since the movement trajectory of the inner support 3 relative to the guide groove 701 does not coincide with or perpendicular to the first and second directions, meaning that the movement trajectory of the inner support 3 relative to the guide groove 701 has an angle with the first and second directions that is not 0°, 90°, 180°, 270°, or 360°, this allows the limiting rod 7 to also move relative to the inner support 3 along the first direction when the first cylinder 6 drives the force-bearing rod 5 to move along the first direction, and the inner support 3 to move along the second direction. Similarly, when the first cylinder 6 drives the force-bearing rod 5 to move in the second direction, the inner support 3 can move in the first direction. This achieves the tendency of the grouped inner support blocks 301 to converge inward and expand outward.

[0030] As described above, the speed, stroke and movement trend of the group of inner support blocks 301 moving along the first or second direction are related to the angle between the corresponding guide groove 701 and the first or second direction. Therefore, by controlling the stroke of the first cylinder 6, the distance the inner support seat 3 moves in the first or second direction can be controlled within a certain range, thereby increasing the range of the positioning fixture in this technical solution and increasing the versatility of the positioning fixture.

[0031] In this embodiment, a number of limiting grooves 101 are provided on the horizontal worktable 1 along the first direction and the second direction, and the inner support 3 is slidably embedded in the limiting grooves 101. Specifically, the limiting slide 101 has an I-shaped cross-section in the third direction. The inner support 3 includes an inner support shaft 302 slidably embedded in the limiting slide 101 and two bearings 303 sleeved on the inner support shaft 302. The inner support block 301 is connected to the inner support shaft 302. A section of the inner support shaft 302 embedded in the middle of the limiting slide 101 has a rounded rectangle or rectangle cross-section. The bearings 303 can be rolled to the side wall of the limiting slide 101, and the two bearings 303 can be clamped at the upper and lower ends of the limiting slide 101 in the third direction. This prevents the inner support block 301 on the inner support 3 from rotating or tipping over. It also reduces the resistance when the inner support 3 moves in the first or second direction and ensures that the inner support block 301 on the inner support 3 can be stably supported on the sheet metal workpiece 2 when the inner support 3 moves toward the sheet metal workpiece 2.

[0032] Furthermore, such as Figure 3 As shown, the inner support shaft 302 includes a limiting shaft 3021 slidably connected to the limiting groove 101 and a free shaft 3022 rotatably connected to the end of the limiting shaft 3021. The free shaft 3022 is coaxially distributed with the limiting shaft 3021, and the free shaft 3022 is slidably connected to the guide groove 701 to reduce friction when the inner support seat 3 slides relative to the guide groove 701, reduce resistance and improve the smoothness of the movement of the inner support seat 3.

[0033] Furthermore, such as Figure 1 As shown, the outer clamping block 4 is driven by the second cylinder 8. Both the second cylinder 8 and the first cylinder 6 are existing technologies, which can drive the outer clamping block 4 and the inner support block 301 to perform stable linear reciprocating motion.

[0034] Furthermore, in this technical solution, the outer clamping block 4 and the inner support block 301 are provided with hard plastic on the side facing the sheet metal workpiece 2 to prevent the outer clamping block 4 and the inner support block 301 from leaving indentations, scratches, etc. on the surface of the sheet metal workpiece 2.

[0035] Furthermore, in this technical solution, the horizontal worktable 1 is provided with an inner support frame 9 that can support the bottom of the sheet metal workpiece 2, and a vertical clamping device 10 that can rotate above the inner support frame 9 and press down on the sheet metal workpiece 2. The inner support frame 9 is located at the geometric center of several inner support blocks 301. When the sheet metal workpiece 2 is upside down on the horizontal worktable 1, the height of the sheet metal workpiece 2 can be initially positioned by the inner support frame 9, and the sheet metal workpiece 2 can be kept in a stable state. At the same time, the vertical clamping device 10 can press the sheet metal workpiece 2 down on the inner support frame 9 to limit the height of the sheet metal workpiece 2. The vertical clamping device 10 is the prior art. It transmits and amplifies the force applied manually or pneumatically through mechanical structures such as linkage mechanisms, eccentric wheels or lead screws, so that the clamping arm drives the chuck to achieve the clamping action. In this technical solution, when the operating handle is operated or the pneumatic device is started, the force is applied to the chuck through the transmission mechanism. The chuck generates a clamping force on the workpiece in the vertical direction, which not completely fixes the sheet metal workpiece 2 on the support frame. That is, at this time, the sheet metal workpiece 2 can slide relative to each other on the same horizontal plane, but will not jump up and down in the vertical direction.

[0036] Working principle: First, the first cylinder 6 drives the inner support blocks 301, causing several inner support blocks 301 to converge towards the inner support frame 9. At the same time, the second cylinder 8 drives the outer clamping block 4 to retract, increasing the distance between the outer clamping block 4 and the inner support blocks 301, reserving space for the inverted sheet metal workpiece 2. Then, the sheet metal workpiece 2 is inverted onto the inner support frame 9, and its position is adjusted appropriately so that the side plate 201 on the sheet metal workpiece 2 can be placed between the group of inner support blocks 301 and outer clamping blocks 4. Finally, the vertical clamping device 10 presses down on the sheet metal workpiece 2 to limit its height on the inner support frame 9. Subsequently, the first cylinder 6 drives the inner support block 301 to move outward and abut against the inner wall of the sheet metal workpiece 2, and the second cylinder 8 drives the outer clamping block 4 to move and abut against the outer wall of the sheet metal workpiece 2. The inner support block 301 and the outer clamping block 4 cooperate with each other to fix the side plate 201 on the sheet metal workpiece 2 in multiple directions and angles, thereby correcting the position of the welding angle required for the sheet metal workpiece 2. At the same time, it effectively restricts the degree of freedom of the sheet metal workpiece 2 during the processing, greatly improves the stability of clamping, and reduces the processing error caused by the shaking and displacement of the sheet metal workpiece 2.

Claims

1. A welding positioning fixture for a precision sheet metal box, characterized in that: The utility model relates to a horizontal workbench (1), a metal sheet workpiece (2) which is inverted on the horizontal workbench (1) and two groups of inner support seats (3) which are slidably connected to the horizontal workbench (1) along a first direction and a second direction which are perpendicular to each other, The inner support blocks (301) on the two groups of inner support seats (3) can be synchronously moved to support the four peripheral sidewalls of the metal sheet workpiece (2), and the horizontal workbench (1) is provided with outer clamping blocks (4) which can move towards the inner support blocks (301), and the corresponding outer clamping blocks (4) and the inner support blocks (301) can clamp the side plates (201) of the metal sheet workpiece (2). The bottom of the horizontal workbench (1) is provided with a driving mechanism which can drive the same group of inner support seats (3) to synchronously move towards or away from each other.

2. The precision sheet metal box welding positioning tooling of claim 1, wherein: The driving mechanism comprises a force rod (5) and a first cylinder (6) which is connected to the middle part of the force rod (5), and the first cylinder (6) can drive the force rod (5) to move along a first direction or a second direction. The force rod (5) is provided with two limiting rods (7) which are symmetrically arranged along the first cylinder (6), each limiting rod (7) is provided with a guide groove (701) which is formed along a third direction, one end of the inner support seat (3) is slidably connected to the guide groove (701), the guide grooves (701) on the two limiting rods (7) are symmetrically arranged along the first cylinder (6), and the movement track of the inner support seat (3) relative to the guide grooves (701) is not coincident with or perpendicular to the first direction and the second direction. When the first cylinder (6) drives the force rod (5) to move along the first direction, the inner support seat (3) can move along the second direction, and when the first cylinder (6) drives the force rod (5) to move along the second direction, the inner support seat (3) can move along the first direction.

3. The precision sheet metal box welding positioning tooling of claim 1, wherein: The horizontal workbench (1) is provided with a plurality of limiting sliding grooves (101) which are formed along the first direction and the second direction, and the inner support seat (3) is slidably embedded in the limiting sliding grooves (101).

4. The precision sheet metal box welding positioning tooling of claim 3, wherein: The cross section of the limiting sliding groove (101) in the third direction is in the shape of an I-beam, the inner support seat (3) comprises an inner support shaft (302) which is slidably embedded in the limiting sliding groove (101) and two bearings (303) which are sleeved on the inner support shaft (302), the inner support block (301) is connected to the inner support shaft (302), a section of the inner support shaft (302) which is embedded in the middle part of the limiting sliding groove (101) is in the shape of a rounded rectangle or a rectangle, the bearings (303) are rollably connected to the sidewalls of the limiting sliding groove (101), and the two bearings (303) can clamp the upper and lower ends of the limiting sliding groove (101) along the third direction.

5. The precision sheet metal box welding positioning tooling of claim 4, wherein: The inner supporting shaft (302) comprises a limiting shaft (3021) slidably connected in the limiting sliding groove (101) and a free shaft (3022) rotatably connected at the end of the limiting shaft (3021), the free shaft (3022) is coaxially distributed with the limiting shaft (3021), and the free shaft (3022) is slidably connected in the guide groove (701).

6. The precision sheet metal box welding positioning fixture of claim 1, wherein: The outer clamping block (4) is driven by a second cylinder (8).

7. The precision sheet metal box welding positioning fixture of claim 1, wherein: The outer clamping block (4) and the inner supporting block (301) are provided with hard plastic on the side facing the metal plate workpiece (2).

8. The precision sheet metal box welding positioning fixture of claim 1, wherein: The horizontal workbench (1) is provided with an inner supporting frame (9) capable of supporting the bottom of the metal plate workpiece (2) and a vertical type pressure closer (10) capable of rotating above the inner supporting frame (9) and capable of being pressed downward above the metal plate workpiece (2).

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