Tool jig of U-shaped support

Abstract

The tool jig of the U-shaped support comprises a bottom plate, and a left clamp and a right clamp are arranged on the bottom plate. The right clamp comprises a lower clamping plate arranged on the bottom plate, the lower clamping plate is connected with an upper clamping plate through a fastener, a right clamping position matched with the U-shaped support in appearance is horizontally arranged between the upper clamping plate and the lower clamping plate, machining grooves are formed in the middle of the lower clamping plate and the middle of the upper clamping plate, the left clamp comprises a left stand column and a right stand column, and the left stand column is fixedly installed on the bottom plate. A connecting column matched with the U-shaped support is arranged between the left stand column and the right stand column, a machining hole for a cutter to pass through is formed in the connecting column, and a left clamping position matched with the U-shaped support in shape is arranged between the left stand column and the right stand column. By arranging the clamping position matched with the shape of the U-shaped support, it is guaranteed that the clamping contact surface is large, stress is uniform, and it is guaranteed that the U-shaped support cannot deform during machining; meanwhile, a machining hole is formed; and the machining precision of the hole can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and more particularly to a tooling fixture for a U-shaped bracket. Background Technology

[0002] With the advancement of technology, machining centers have become widely used for workpiece processing. However, various factors affect the final dimensional accuracy of products during the machining process. These factors are diverse, including positioning errors, clamping errors, tool setting errors, machine tool accuracy, cutting tool accuracy, elastic deformation of the machining system, thermal deformation, and residual stress. These factors may act individually or in combination, leading to a decrease in machining accuracy. Therefore, appropriate measures need to be taken during the machining process to reduce the impact of these factors and thus improve machining accuracy.

[0003] In actual machining processes, clamping errors are the most common factor affecting workpiece accuracy. However, existing tooling fixtures are rather haphazard in setting support surfaces and positioning holes. While they can clamp the workpiece, the consistency or accuracy of its dimensions after machining needs improvement, especially when a workpiece requires flatness, concentricity, and perpendicularity simultaneously. Utility Model Content

[0004] The purpose of this utility model is to provide a tooling fixture for a U-shaped bracket to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a tooling fixture for a U-shaped bracket, including a base plate, on which a left clamp and a right clamp are provided;

[0006] The right clamp includes a lower clamping plate mounted on the base plate, an upper clamping plate connected to the lower clamping plate by fasteners, and a right clamping position adapted to the shape of the U-shaped bracket is horizontally arranged between the upper and lower clamping plates. Both the lower and upper clamping plates have machining grooves in the middle.

[0007] The left fixture includes a left column and a right column, with the left column fixedly mounted on the base plate. A connecting column adapted to the U-shaped bracket is provided between the left and right columns, and a machining hole for the tool to pass through is provided on the connecting column. A left clamping position adapted to the shape of the U-shaped bracket is provided between the left and right columns.

[0008] Compared with existing technologies, by setting clamping positions that are adapted to the shape of the U-shaped bracket, a large clamping contact surface is ensured, the force is evenly distributed, and the U-shaped bracket will not deform during processing; at the same time, the setting of processing holes ensures the processing accuracy of the holes.

[0009] The lower clamping plate is provided with three positioning grooves that are respectively connected to the right clamping position. A positioning plate is fixedly installed in the positioning groove, and the front end of the positioning plate extends into the right clamping position to form a positioning point.

[0010] The lower clamping plate is equipped with two positioning posts, and the upper clamping plate is equipped with positioning holes that are compatible with the positioning posts.

[0011] Both the lower and upper clamping plates are provided with clamping grooves. The two clamping grooves are combined to form a right clamping position. A clearance groove is provided on one side of the clamping groove.

[0012] Several connecting blocks are set on the upper clamping plate, and the connecting blocks abut against the lower clamping plate; a drainage trough is set between two adjacent connecting blocks.

[0013] A limit block is provided on one side of the left column, and the limit block is set on the base plate. A limit groove that matches the limit plate is provided at the bottom of the right column.

[0014] Both the left and right columns are equipped with recessed grooves that are compatible with the connecting columns.

[0015] In addition to the technical problems solved by the present invention, the technical features constituting the technical solutions, and the advantages brought about by the technical features of these technical solutions as described above, other technical problems that the present invention can solve, other technical features contained in the technical solutions, and the advantages brought about by these technical features will be further described in detail with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the U-shaped bracket described in this utility model.

[0017] Figure 2 This is a three-dimensional schematic diagram of the U-shaped bracket being mounted in this utility model.

[0018] Figure 3 This is a three-dimensional schematic diagram of the present invention without the U-shaped bracket.

[0019] Figure 4 This is an exploded schematic diagram of this utility model.

[0020] The reference numerals are as follows: 01. Base plate; 02. Left clamp; 03. Right clamp; 04. Lower clamp; 05. Upper clamp; 06. Right clamping position; 07. Machining groove; 08. Positioning groove; 09. Positioning plate; 10. Positioning post; 11. Clearance groove; 12. Connecting block; 13. Left column; 14. Right column; 15. Connecting post; 16. Machining hole; 17. Left clamping position; 18. Limiting block; 19. Limiting groove; 20. Sinking groove. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please see Figure 1-4 As shown, the tooling fixture for the U-shaped bracket of this utility model requires machining of surface A, surface B, and coaxial hole C during the machining process in the machining center, due to the overall thinness of the U-shaped bracket. Figure 1 This invention is used to clamp U-shaped brackets, preventing deformation during processing and ensuring machining accuracy.

[0023] It includes a base plate 01 for mounting on the machine tool of a machining center. It should be noted that the machining center is preferably a four-axis machining center, and the base plate 01 is fixedly mounted on the A-axis (workpiece rotation axis) of the machining center. A left fixture 02 and a right fixture 03 are set on the base plate 01. In actual application, the U-shaped bracket is placed in the left fixture 02 for machining. After the U-shaped bracket is machined on the left fixture 02, the operator removes the U-shaped bracket from the left fixture 02 and transfers it to the right fixture 03 for further machining. This completes the machining of the U-shaped bracket.

[0024] The right clamp 03 includes a lower clamping plate 04 disposed on the base plate 01. The lower clamping plate 04 can be fixedly installed on the base plate 01 by means of fasteners or integral machining. In this application, the lower clamping plate 04 will be fixedly installed on the base plate 01 as a whole by integral machining. An upper clamping plate 05 is connected to the lower clamping plate 04 by fasteners. A right clamping position 06 adapted to the shape of the U-shaped bracket is horizontally disposed between the upper clamping plate 05 and the lower clamping plate 04. A machining groove 07 is provided in the middle of both the lower clamping plate 04 and the upper clamping plate 05. The lower clamping plate 04 and the upper clamping plate 05 have the same shape and are both U-shaped. The cutting tool extends into the machining groove 07 to machine the U-shaped bracket in the right clamping position 06.

[0025] During use, since the upper clamping plate 05 and the lower clamping plate 04 are connected by fasteners, when the fasteners are loosened, the upper clamping plate 05 and the lower clamping plate 04 are in a loose state, and the right clamping position 06 is opened. Then, the U-shaped bracket is placed in the right clamping position 06, and the fasteners are tightened to close the upper clamping plate 05 and the lower clamping plate 04, thereby fixing the lateral detection accuracy (D) in the right clamping position 06. Surface A is then machined using a machining center.

[0026] The lower clamping plate 04 has three positioning slots 08 that communicate with the right clamping position 06. Positioning plates 09 are fixedly installed in the positioning slots 08 using fasteners. The front end of the positioning plate 09 extends into the right clamping position 06 to form a positioning point. When the U-shaped bracket is placed in the right clamping position 06, it abuts against the plane of the U-shaped bracket through the positioning point on the positioning plate 09, thus achieving its positioning. Simultaneously, the positioning is achieved by using positioning points, while the circular holes (coaxial holes C) at both ends of the U-shaped bracket are clamped without stress, ensuring the machining accuracy of the circular holes at both ends.

[0027] The lower clamping plate 04 is provided with two positioning posts 10, and the upper clamping plate 05 is provided with positioning holes that are adapted to the positioning posts 10. The cooperation between the positioning posts 10 and the positioning holes ensures that the right clamping position 06 will not be misaligned when the upper clamping plate 05 is closed with the lower clamping plate 04.

[0028] Both the lower clamping plate 04 and the upper clamping plate 05 are provided with clamping grooves. The two clamping grooves are combined to form a right clamping position 06. A clearance groove 11 is provided on one side of the clamping groove to prevent the tool from colliding with the upper clamping plate 05 or the lower clamping plate 04 during machining, thus preventing damage to the tool.

[0029] Several connecting blocks 12 are provided on the upper clamping plate 05, and the connecting blocks 12 abut against the lower clamping plate 04. A drain groove is provided between two adjacent connecting blocks 12. The coolant used in the machining process can flow out from the drain groove to prevent coolant from accumulating in the right clamping position 06.

[0030] The left clamp 02 includes a left column 13 and a right column 14. A connecting column 15 adapted to a U-shaped bracket is provided between the left column 13 and the right column 14. The connecting column 15 has a machining hole 16 for the tool to pass through. One end of the connecting column 15 is fixedly connected to the left column 13 by fasteners, and the right column 14 is fixedly installed on the other end of the connecting column 15 by fasteners. The left column 13 is fixedly installed on the base plate 01 by fasteners. A left clamping position 17 adapted to the shape of the U-shaped bracket is provided between the left column 13 and the right column 14. Since the right column 14 is fixedly connected to the connecting column 15 by fasteners, when the fasteners are loosened, the left clamping position 17 opens, and the operator places the U-shaped bracket in the left clamping position 17 and fits the U-shaped bracket onto the connecting column 15. Then, by tightening the fasteners, the right column 14 moves towards the left column 13, closing the left clamping position 17, thus clamping the U-shaped bracket. Because the connecting column 15 and the U-shaped bracket are compatible, sufficient support is provided for the U-shaped bracket, preventing deformation of the U-shaped bracket during machining of its B-side by the machining center. Simultaneously, a machining hole 16 is provided on the connecting column 15. When the machining center processes the coaxial holes C at both ends of the U-shaped bracket, the tool processes one coaxial hole C. After processing, the tool passes through the machining hole 16 to process the other coaxial hole C. This is equivalent to machining both coaxial holes C in one operation, thus ensuring the coaxiality of the two coaxial holes C.

[0031] A limiting block 18 is provided on one side of the left column 13. The limiting block 18 is set on the base plate 01. A limiting groove 19 adapted to the limiting plate is provided at the bottom of the right column 14. Through the cooperation of the limiting groove 19 and the limiting plate, the left clamping position 17 will not shift when it is opened and closed.

[0032] Both the left column 13 and the right column 14 are provided with countersunk grooves 20 that are adapted to the connecting column 15. The countersunk grooves 20 are provided to ensure the assembly accuracy between the left column 13, the right column 14 and the connecting column 15 and to reduce the overall volume of the left clamp 02.

[0033] In use, this invention first separates the upper clamping plate 05 and lower clamping plate 04 on the right clamp 03, places the U-shaped bracket in the right clamping position 06, and ensures the U-shaped bracket abuts against the positioning block. Then, the upper clamping plate 05 and lower clamping plate 04 are closed, fixing the U-shaped bracket in the right clamp. The machining center then processes surface A of the U-shaped bracket. After surface A of the U-shaped bracket is processed, it is transferred to the left clamp 02, the right column 14 and left column 13 are separated, and the U-shaped bracket is placed in the left clamping slot. Surface B and coaxial hole C of the U-shaped bracket are then processed. Conversely, processing surface A and coaxial hole C of the U-shaped bracket first using the left clamp 02 before transferring it to the right clamp 03 also ensures the same precision.

[0034] It should be noted that, for clarity, the fasteners described in this application are any one of screws, bolts, and bolts.

[0035] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A tooling fixture for a U-shaped bracket, comprising a base plate, wherein a left clamp and a right clamp are disposed on the base plate, characterized in that, The right clamp includes a lower clamping plate mounted on the base plate, an upper clamping plate connected to the lower clamping plate by fasteners, and a right clamping position adapted to the shape of the U-shaped bracket is horizontally arranged between the upper and lower clamping plates. Both the lower and upper clamping plates have machining grooves in the middle. The left fixture includes a left column and a right column, with the left column fixedly mounted on the base plate. A connecting column adapted to the U-shaped bracket is provided between the left and right columns, and a machining hole for the tool to pass through is provided on the connecting column. A left clamping position adapted to the shape of the U-shaped bracket is provided between the left and right columns.

2. The tooling fixture for the U-shaped bracket according to claim 1, characterized in that: The lower clamping plate is provided with three positioning grooves that are respectively connected to the right clamping position. A positioning plate is fixedly installed in the positioning groove, and the front end of the positioning plate extends into the right clamping position to form a positioning point.

3. The tooling fixture for the U-shaped bracket according to claim 2, characterized in that: The lower clamping plate is equipped with two positioning posts, and the upper clamping plate is equipped with positioning holes that are compatible with the positioning posts.

4. The tooling fixture for the U-shaped bracket according to claim 3, characterized in that: Both the lower and upper clamping plates are provided with clamping grooves. The two clamping grooves are combined to form a right clamping position. A clearance groove is provided on one side of the clamping groove.

5. The tooling fixture for the U-shaped bracket according to claim 4, characterized in that: Several connecting blocks are set on the upper clamping plate, and the connecting blocks abut against the lower clamping plate; a drainage trough is set between two adjacent connecting blocks.

6. The tooling fixture for the U-shaped bracket according to claim 1, characterized in that: A limit block is provided on one side of the left column, and the limit block is set on the base plate. A limit groove that matches the limit plate is provided at the bottom of the right column.

7. The tooling fixture for the U-shaped bracket according to claim 6, characterized in that: Both the left and right columns are equipped with recessed grooves that are compatible with the connecting columns.

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