A U-shaped workpiece welding jig facilitating positioning and clamping of a workpiece

Abstract

The utility model provides a kind of U-shaped workpiece welding jig for positioning and clamping workpiece conveniently, comprising: mounting frame and support base, the upper positioning plate for being used to the fixed support of workpiece top clamp is equipped with a group on the left side middle position upper end of workpiece positioning frame, the upper positioning plate is fixed with workpiece positioning frame by bolt connection, compared with prior art, the utility model has the beneficial effects as follows: after starting motor, power is transmitted to connecting shaft and inner shaft through coupling, drive positioning axle seat adjustment to preset station, place U-shaped workpiece in workpiece positioning frame, so that its lower end is contacted with rubber flexible pad of side workpiece clamp one and side workpiece clamp two, anti-skid relief can enhance friction to prevent displacement, then tighten the bolt of workpiece top clamp, vertical pressure is applied to workpiece top by 7-shaped upper positioning plate, forming three-point positioning clamping system, during welding process, support stand can disperse mechanical vibration, ensure positioning stability.

Description

Technical Field

[0001] This utility model belongs to the field of welding fixture technology, and relates to a U-shaped workpiece welding fixture that facilitates the positioning and clamping of workpieces. Background Technology

[0002] Existing welding fixtures have several drawbacks when positioning and clamping U-shaped workpieces, mainly manifested in insufficient positioning accuracy, unstable clamping, difficulty in adjustment, and low efficiency. These drawbacks are typically related to the versatility of fixture design, the specific shape of the workpiece, and the complexity of operation. Due to the special structure of U-shaped workpieces, standard fixtures often struggle to adapt to their shape, resulting in a small contact area between the positioning point and the workpiece, which compromises welding stability. The fixture's adjustment mechanism may not be flexible enough to quickly adapt to U-shaped workpieces of different sizes, thus affecting welding efficiency. Conventional solutions include using customized fixtures, adding auxiliary positioning devices, or employing manual adjustment. While customized fixtures can improve positioning accuracy and clamping stability, their design and manufacturing costs are high, and their adaptability to a single type or size of workpiece is limited. Adding auxiliary positioning devices, such as adjustable support blocks and clamps, can improve flexibility but increases operational complexity and prolongs preparation time. The disadvantage of these methods is that they cannot simultaneously meet the requirements of high precision, high efficiency, and low cost. While customized fixtures offer high precision, their application is limited by cost and adaptability issues. Auxiliary positioning devices improve flexibility, but the increased complexity and time cost of operation affect production efficiency. Manual adjustment, while flexible, cannot guarantee consistent welding quality and production efficiency. Therefore, there is an urgent need for a U-shaped workpiece welding fixture that facilitates workpiece positioning and clamping to solve the above problems. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a U-shaped workpiece welding fixture that facilitates the positioning and clamping of workpieces, thereby solving the problems mentioned in the background art.

[0004] This utility model is achieved through the following technical solution: a U-shaped workpiece welding fixture for easy positioning and clamping of workpieces, comprising: a mounting frame and a support base, wherein a set of upper positioning plates for fixing and supporting the top clamp of the workpiece is provided at the upper end of the middle position on the left side of the workpiece positioning frame, and the upper positioning plates are fixedly connected to the workpiece positioning frame by bolts.

[0005] The upper positioning plate has a 7-shaped cross-section when viewed from the front. The upper front side of the upper positioning plate is fixed to the workpiece top clamp by bolts. The upper front and rear sides of the right side of the workpiece positioning frame are respectively provided with a set of side workpiece clamp 1 and side workpiece clamp 2 for positioning and clamping the lower end of the U-shaped workpiece. The side workpiece clamp 1, side workpiece clamp 2 and workpiece top clamp are of the same specifications. The inner side of the side workpiece clamp 1, side workpiece clamp 2 and workpiece top clamp are respectively provided with a set of flexible pads for contacting the U-shaped workpiece.

[0006] In a preferred embodiment, the flexible pad is made of a rubber material, and the inner side of the flexible pad has anti-slip ridges at the contact point with the U-shaped workpiece. The right side of the mounting frame has a set of support stands for supporting the welding fixture. In actual use, the support base of the fixture is first placed firmly on the workbench, and the I-shaped base frame is fixed to the mounting frame with bolts. After starting the motor, the power is transmitted to the connecting shaft and the inner shaft through the coupling, driving the positioning shaft seat to adjust to the preset position. The U-shaped workpiece is placed on the workpiece positioning frame, so that its lower end contacts the rubber flexible pads of the side workpiece clamps one and two. The anti-slip ridges can enhance the friction and prevent displacement. Then, the bolts of the workpiece top clamp are tightened, and vertical pressure is applied to the top of the workpiece through the 7-shaped upper positioning plate to form a three-point positioning clamping system. During the welding process, the support stands can disperse mechanical vibration and ensure positioning stability. After welding is completed, the workpiece top clamp bolts are loosened first, and then the workpiece is taken out. The flexible pads not only avoid scratching the workpiece surface, but also adapt to the small tolerances of workpieces of different sizes.

[0007] In a preferred embodiment, the lower end of the support frame is provided with a set of I-shaped base frames for supporting its lower end. The mounting frame is fixed to the support frame and the I-shaped base frames by bolts. The upper end of the mounting frame is provided with a set of motors for driving the workpiece positioning frame to adjust the rotation angle.

[0008] In a preferred embodiment, the front side of the motor is provided with a set of bevel gearboxes for transmitting power at right angles, and the right side of the bevel gearbox is provided with a set of connecting shafts for driving the inner shaft to rotate. The connecting shafts and the inner shaft are an integral structure.

[0009] In a preferred embodiment, two sets of positioning bearings for maintaining the rotational positioning of the inner shaft are provided on the outer side of the middle position of the inner shaft. The lower end of each set of positioning bearings is connected and fixed to the support frame by two sets of bolts, and each set of positioning bearings is provided inside.

[0010] In a preferred embodiment, the inner shaft passes through the interior of two sets of positioning bearings, and a workpiece positioning frame for driving the U-shaped workpiece to rotate is provided on the right side of the inner shaft.

[0011] In a preferred embodiment, the workpiece positioning frame has a concave cross-section when viewed from above, and is made of aluminum alloy. The middle left side of the workpiece positioning frame is connected and fixed to the right side of the inner shaft. In actual use, the I-shaped base frame is first assembled into a rigid whole with the support frame and mounting frame by bolts. After starting the motor, the power is converted into right-angle transmission through the bevel gearbox, driving the integrated connecting shaft and the inner shaft to rotate synchronously. Before operation, the lubrication status of the bearings of the two sets of positioning shaft seats needs to be checked to ensure that the inner shaft rotates smoothly in the positioning bearings. The U-shaped workpiece is placed in the concave groove of the aluminum alloy workpiece positioning frame, and after being fixed by the side workpiece clamp and the top clamp, the inner shaft is controlled by the motor to drive the workpiece positioning frame to rotate 0-360° to achieve multi-angle welding operation. During the rotation, the double bolt structure of the positioning shaft seat can effectively suppress axial movement, and the bevel gearbox can ensure transmission accuracy. After welding is completed, the motor is turned off, and the workpiece clamping device is released to take out the finished product.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are as follows: First, the support base of the fixture is placed firmly on the workbench. The I-shaped base frame is fixed to the mounting frame by bolts. After starting the motor, the power is transmitted to the connecting shaft and the inner shaft through the coupling, driving the positioning shaft seat to adjust to the preset position. The U-shaped workpiece is placed on the workpiece positioning frame, so that its lower end contacts the rubber flexible pads of the side workpiece clamp one and the side workpiece clamp two. The anti-slip ridges can enhance the friction and prevent displacement. Then, the bolts of the workpiece top clamp are tightened. Vertical pressure is applied to the top of the workpiece through the 7-shaped upper positioning plate to form a three-point positioning clamping system. During the welding process, the support frame can disperse mechanical vibration and ensure positioning stability. After welding is completed, the workpiece top clamp bolts are loosened first, and then the workpiece can be taken out. Its flexible pads not only avoid scratching the workpiece surface, but also adapt to the small tolerances of workpieces of different sizes.

[0013] First, assemble the I-shaped base frame into a rigid whole with the support frame and mounting bracket using bolts. After starting the motor, the power is converted into right-angle transmission through the bevel gearbox, driving the integrated connecting shaft and the inner shaft to rotate synchronously. Before operation, check the lubrication status of the bearings of the two sets of positioning shaft seats to ensure that the inner shaft rotates smoothly in the positioning bearings. Place the U-shaped workpiece into the concave groove of the aluminum alloy workpiece positioning frame, and fix it with the side workpiece clamp and the top clamp. Then, control the inner shaft with the motor to drive the workpiece positioning frame to rotate and adjust from 0 to 360° to achieve multi-angle welding operations. During the rotation, the double bolt structure of the positioning shaft seat can effectively suppress axial movement, and the bevel gearbox can ensure transmission accuracy. After welding is completed, turn off the motor and release the workpiece clamping device to take out the finished product. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a right-angled front view structural schematic diagram of a U-shaped workpiece welding fixture for facilitating workpiece positioning and clamping according to the present invention.

[0016] Figure 2 This is a schematic diagram of the left front oblique side structure of the mounting frame and support frame in a U-shaped workpiece welding fixture for easy positioning and clamping of workpieces according to the present invention.

[0017] Figure 3 This is a left oblique front view of the structure of the workpiece positioning frame in a U-shaped workpiece welding fixture that facilitates workpiece positioning and clamping according to this utility model.

[0018] Figure 4 This is a top view of the right oblique front side structure of the side workpiece clamp one and the side workpiece clamp two in a U-shaped workpiece welding fixture for easy positioning and clamping of workpieces according to the present invention.

[0019] In the diagram: 100-mounting bracket, 110-supporting upright, 120-I-shaped base frame, 130-motor, 140-coupling, 150-connecting shaft, 160-inner shaft, 170-positioning shaft seat, 180-workpiece positioning bracket, 190-upper positioning plate, 200-workpiece top clamp, 210-side workpiece clamp one, 220-side workpiece clamp two, 230-flexible pad, 240-supporting base. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 As the first embodiment of this utility model:

[0022] A U-shaped workpiece welding fixture for easy positioning and clamping of workpieces includes: a mounting frame 100, a workpiece positioning frame 180 and a support base 240. The upper end of the middle left side of the workpiece positioning frame 180 is provided with an upper positioning plate 190 for fixing and supporting the workpiece top clamp 200. The upper positioning plate 190 is fixed to the workpiece positioning frame 180 by bolts.

[0023] The front cross-section of the upper positioning plate 190 is a 7-shaped structure. The upper front side of the upper positioning plate 190 is fixed to the workpiece top clamp 200 by bolts. The upper right side of the workpiece positioning frame 180 is provided with a set of side workpiece clamp 1 210 and side workpiece clamp 220 for positioning and clamping the lower end of the U-shaped workpiece. The side workpiece clamp 1 210, side workpiece clamp 220 and workpiece top clamp 200 have the same specifications. The inner side of the side workpiece clamp 1 210, side workpiece clamp 220 and workpiece top clamp 200 is provided with a set of flexible pads 230 for contacting the U-shaped workpiece.

[0024] The flexible pad 230 is made of a rubber material, and the inner side of the flexible pad 230 has anti-slip ridges at the contact point with the U-shaped workpiece. A set of support brackets 110 for supporting the welding fixture is provided on the right side of the mounting frame 100. In actual use, the fixture's support base 240 is first firmly placed on the worktable. The I-shaped base frame 120 is fixed to the mounting frame 100 with bolts. After starting the motor 130, power is transmitted through the coupling 140 to the connecting shaft 150 and the inner shaft 160, driving the positioning shaft seat 170 to adjust to the preset position. The U-shaped workpiece is then placed on the workpiece positioning frame 1. 80, so that its lower end contacts the rubber flexible pad 230 of the side workpiece clamp 1 210 and the side workpiece clamp 220. The anti-slip ridges can enhance friction and prevent displacement. Then tighten the bolt of the workpiece top clamp 200. Apply vertical pressure to the top of the workpiece through the 7-shaped upper positioning plate 190 to form a three-point positioning clamping system. During the welding process, the support frame 110 can disperse mechanical vibration and ensure positioning stability. After welding is completed, first loosen the bolt of the workpiece top clamp 200 and then take out the workpiece. Its flexible pad 230 can not only avoid scratching the surface of the workpiece, but also adapt to the small tolerances of workpieces of different sizes.

[0025] Please see Figures 1-4 As a second embodiment of this utility model: based on the description in the above embodiments, further, the lower end of the support frame 110 is provided with a set of I-shaped base frames 120 for supporting its lower end. The mounting frame 100 is fixed to the support frame 110 and the I-shaped base frames 120 by bolts. The upper end of the mounting frame 100 is provided with a set of motors 130 for driving the workpiece positioning frame 180 to adjust the rotation angle.

[0026] A set of bevel gearboxes for transmitting power at right angles is provided on the front side of the motor 130. A set of connecting shafts 150 for driving the inner shaft 160 to rotate is provided on the right side of the bevel gearbox. The connecting shafts 150 and the inner shaft 160 are an integral structure.

[0027] Two sets of positioning bearings 170 are provided on the outer side of the middle position of the inner shaft 160 to maintain the rotation and positioning of the inner shaft 160. The lower end of each positioning bearing 170 is connected and fixed to the support frame 110 by two sets of bolts, and each positioning bearing 170 is provided with a positioning bearing inside.

[0028] The inner shaft 160 passes through the interior of two sets of positioning bearings, and a workpiece positioning frame 180 is provided on the right side of the inner shaft 160 for driving the U-shaped workpiece to rotate.

[0029] The workpiece positioning frame 180 has a concave cross-section when viewed from above, and the workpiece positioning frame 180 is made of aluminum alloy. The middle left side of the workpiece positioning frame 180 is connected and fixed to the right side of the inner shaft 160. In actual use, the I-shaped base frame 120 is first assembled into a rigid whole with the support frame 110 and the mounting frame 100 by bolts. After starting the motor 130, the power is converted into right-angle transmission through the bevel gearbox, driving the integrated connecting shaft 150 and the inner shaft 160 to rotate synchronously. Before operation, the lubrication status of the bearings of the two sets of positioning shaft seats 170 needs to be checked to ensure that the inner shaft 160 rotates smoothly in the positioning bearing. The U-shaped workpiece is placed in the concave groove of the aluminum alloy workpiece positioning frame 180. After being fixed by the side workpiece clamp and the top clamp, the inner shaft 160 is controlled by the motor 130 to drive the workpiece positioning frame 180 to rotate from 0 to 360° to achieve multi-angle welding operation. During the rotation, the double bolt structure of the positioning shaft seat 170 can effectively suppress axial movement, and the bevel gearbox can ensure transmission accuracy. After welding is completed, the motor 130 is turned off, and the workpiece clamping device is released to take out the finished product.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A U-shaped workpiece welding fixture for easy positioning and clamping of workpieces, comprising: The mounting bracket (100), workpiece positioning bracket (180), and support base (240) are characterized in that: the upper end of the middle left side of the workpiece positioning bracket (180) is provided with an upper positioning plate (190) for fixing and supporting the workpiece top clamp (200), and the upper positioning plate (190) is fixed to the workpiece positioning bracket (180) by bolts. The upper positioning plate (190) has a 7-shaped cross-section when viewed from the front. The upper front side of the upper positioning plate (190) is fixed to the workpiece top clamp (200) by bolts. The upper right side of the workpiece positioning frame (180) is provided with a set of side workpiece clamp one (210) and side workpiece clamp two (220) for positioning and clamping the lower end of the U-shaped workpiece. The side workpiece clamp one (210), side workpiece clamp two (220) and workpiece top clamp (200) are of the same specifications. The inner side of the side workpiece clamp one (210), side workpiece clamp two (220) and workpiece top clamp (200) is provided with a set of flexible pads (230) for contacting the U-shaped workpiece.

2. The U-shaped workpiece welding fixture for facilitating workpiece positioning and clamping according to claim 1, characterized in that: The flexible pad (230) is made of a rubber material, and the inner side of the flexible pad (230) is provided with anti-slip ridges where it fits against the U-shaped workpiece. The mounting bracket (100) has a set of support brackets (110) on the right side for supporting the welding fixture.

3. A U-shaped workpiece welding fixture for facilitating workpiece positioning and clamping according to claim 2, characterized in that: The lower end of the support frame (110) is provided with a set of I-shaped base frames (120) for supporting its lower end. The mounting frame (100) is fixed to the support frame (110) and the I-shaped base frames (120) by bolts. The upper end of the mounting frame (100) is provided with a set of motors (130) for driving the workpiece positioning frame (180) to adjust the rotation angle.

4. A U-shaped workpiece welding fixture for facilitating workpiece positioning and clamping according to claim 3, characterized in that: The motor (130) has a set of bevel gearboxes on the front side for transmitting power at right angles. The bevel gearbox has a set of connecting shafts (150) on the right side for driving the inner shaft (160) to rotate. The connecting shafts (150) and the inner shaft (160) are an integral structure.

5. A U-shaped workpiece welding fixture for facilitating workpiece positioning and clamping according to claim 4, characterized in that: Two sets of positioning bearings (170) are provided on the outer side of the middle position of the inner shaft (160) to maintain the rotation and positioning of the inner shaft (160). The lower end of each set of positioning bearings (170) is connected and fixed to the support frame (110) by two sets of bolts, and each set of positioning bearings (170) is provided with a set of positioning bearings inside.

6. A U-shaped workpiece welding fixture for facilitating workpiece positioning and clamping according to claim 5, characterized in that: The inner shaft (160) passes through the interior of two sets of positioning bearings, and a set of workpiece positioning frames (180) for driving the U-shaped workpiece to rotate is provided on the right side of the inner shaft (160).

7. A U-shaped workpiece welding fixture for facilitating workpiece positioning and clamping according to claim 6, characterized in that: The workpiece positioning frame (180) has a concave cross-section when viewed from above, and the workpiece positioning frame (180) is made of an aluminum alloy material. The middle left side of the workpiece positioning frame (180) is connected and fixed to the right side of the inner shaft (160).

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