A jig for machining

Abstract

This utility model discloses a machining fixture, relating to the field of machining technology. To address the problems of existing fixtures, such as difficulty in centering, inflexible adjustment, and unreliable locking that affect machining accuracy, the following technical solution is proposed: A machining fixture with a moving groove and a control groove inside the machining table. The moving groove is positioned along the center line of the machining table. Two first threaded rods are arranged within the moving groove, with a moving block fitted around the middle of each first threaded rod. The moving block engages with the first threaded rod for transmission. Each first threaded rod has a second bevel gear at one end, and the other end is rotatably connected to the inside of the machining table. Both second bevel gears mesh with the first bevel gears. This utility model can quickly and accurately center and clamp the workpiece, with flexible adjustment of the clamping height and contact surface, and ensures machining stability through an automatic locking mechanism.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a machining fixture. Background Technology

[0002] In the field of machining, fixtures are indispensable key process equipment. Their main function is to quickly and stably position and clamp workpieces during machining to ensure machining accuracy and production efficiency. However, existing machining fixtures generally have significant limitations in practical applications. On the one hand, when clamping workpieces of varying sizes, traditional fixtures struggle to achieve rapid and accurate centering, often requiring operators to repeatedly perform manual measurements and alignment, which is not only inefficient but also makes it difficult to guarantee positioning accuracy. On the other hand, their structure is usually fixed, resulting in a lack of flexibility in key parameters such as clamping height and contact area with the workpiece, leading to limited functionality and poor adaptability.

[0003] For example, using large fixtures to machine small workpieces may obstruct or interfere with the machining area, while using small fixtures to hold large workpieces may result in insufficient clamping force due to insufficient contact area. More importantly, some fixtures with adjustment functions often have unreliable locking structures after adjustment, which are prone to loosening under machining vibrations or cutting force impacts, leading to workpiece displacement, severely affecting machining accuracy, and even damaging the workpiece or cutting tool. Therefore, the market urgently needs a new type of machining fixture that integrates rapid centering, flexible adjustment, and reliable locking functions. Utility Model Content

[0004] The purpose of this utility model is to provide a machining fixture to solve the problems of existing machining fixtures having fixed structures and single functions, making it difficult to quickly center and position the workpiece according to changes in workpiece size and shape, and to flexibly adjust the clamping height and contact area. In addition, the locking mechanism of some adjustable fixtures has insufficient stability during the machining process, which affects the machining accuracy.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A machining fixture includes a machining table, a movable slot, a control slot, a first bevel gear, a first threaded rod, a movable block, a connecting slot, a connecting rod, a support plate, a fixed plate, a rotating rod, and a clamping plate. The machining table has a movable slot and a control slot inside. The movable slot is positioned along the center line of the machining table. Two first threaded rods are installed within the movable slot. A movable block is fitted around the middle of each first threaded rod, and the movable block meshes with the first threaded rod for transmission. Each first threaded rod has a second bevel gear at one end and a rotatable connection at the other end to the inside of the machining table. Both second bevel gears mesh with the first bevel gears. A connecting slot is also provided at the top of the movable slot. The connecting rod passes through the connecting slot and is fixed to the movable block. A support plate is slidably connected inside the connecting rod. A fixed plate is fixedly installed at the upper end of the support plate. A rotating rod is rotatably installed at the center of the fixed plate, and a clamping plate is fixedly installed at the top of the rotating rod.

[0007] Furthermore, it also includes a lifting plate and a second threaded rod. The second threaded rod is rotatably connected to the middle of the connecting rod, and a lifting plate is engaged on the outer side of the second threaded rod. The lifting plate is fixedly connected to the support plate.

[0008] Furthermore, it also includes a fixing plate, a spring, a locking hole, and a locking rod. A fixing plate is fixedly installed at the lower part of the rotating rod, and a spring is also sleeved between the fixing plate and the fixing plate. Two sets of locking rods are fixedly connected to the lower end of the clamping plate, and two sets of locking holes for cooperating with the locking rods are provided at the upper end of the fixing plate.

[0009] Furthermore, one end of the rotating cap is connected to the first bevel gear, and the other end is located inside the control slot.

[0010] Furthermore, it also includes a stop door and a contact plate. The stop door is connected to the upper rotating shaft of the control slot, and the contact plate is fixedly connected to the upper part of the control slot near the rotating cap.

[0011] Furthermore, it also includes a maintenance door, which is provided at the lower end of the moving slot.

[0012] Furthermore, it also includes a short splint and a long splint. The splint consists of a short splint and a long splint with rounded corners, and the short splint is fixedly set at the center of the long splint.

[0013] This utility model has the following beneficial effects:

[0014] This invention utilizes a linkage mechanism, allowing the operator to rotate only one rotating cap. Through the transmission of bevel gears and threaded rods, the clamping plates on both sides can move synchronously towards or away from each other, thereby achieving rapid and precise centering clamping of workpieces of different sizes and greatly improving positioning efficiency.

[0015] Meanwhile, the design also gives the clamp excellent adaptability. The vertical height of the clamp can be easily adjusted by the independent second threaded rod, and the long and short clamps can be easily switched by rotating the rotating rod, flexibly changing the contact area with the workpiece, ensuring that the optimal clamping effect can be provided for workpieces of different sizes and heights.

[0016] Furthermore, to address the potential loosening of the adjustable structure during processing, this invention incorporates a spring-driven locking rod mechanism. Once the clamping plate is properly adjusted, the locking rod automatically inserts into the locking hole to achieve a rigid lock, effectively resisting vibrations and impacts during processing and ensuring the stability of the fixture in operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the device structure of this utility model;

[0018] Figure 2 This is a half-sectional view of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the locking rod of this utility model.

[0020] Figures 1 to 3 The reference numerals in the attached drawings are as follows: 1-processing table; 2-moving groove; 3-first bevel gear; 4-rotating cap; 5-second bevel gear; 6-first threaded rod; 7-moving block; 8-connecting groove; 9-connecting rod; 10-support plate; 11-fixed plate; 12-rotating rod; 13-clamping plate; 14-maintenance door; 15-lifting plate; 16-second threaded rod; 17-fixed plate; 18-spring; 19-locking hole; 20-locking rod; 21-short clamping plate; 22-long clamping plate; 23-control groove; 24-stop door; 25-contact plate. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] As attached Figures 1-2 As shown, a machining fixture includes a machining table 1. A movable groove 2 is formed inside the machining table 1 along its centerline, and a first bevel gear 3 is rotatably mounted in the center of the movable groove 2. Two second bevel gears 5 are meshed on both sides of the first bevel gear 3. A first threaded rod 6 is fixedly connected to the tail of each second bevel gear 5, and the other end of the first threaded rod 6 is rotatably connected to the inner wall of the movable groove 2. A movable block 7 is threaded onto each of the two first threaded rods 6.

[0023] A connecting groove 8, which communicates with the moving groove 2, is provided on the upper part of the processing table 1. A connecting rod 9 is fixedly welded to the upper part of each moving block 7, and the connecting rod 9 passes upward through the connecting groove 8. A support plate 10 is slidably installed on the outside of the connecting rod 9, and a fixed plate 11 is fixedly welded to the upper part of the support plate 10. A rotating rod 12 is rotatably installed in the middle of the fixed plate 11, and a clamping plate 13 is fixedly welded to the upper part of the rotating rod 12. With this structure, when the first bevel gear 3 is rotated, the two moving blocks 7 and the clamping plate 13 connected to them can achieve synchronous opposite or opposite movements through the transmission of the second bevel gear 5 and the first threaded rod 6, thereby quickly centering and clamping the workpiece.

[0024] In this embodiment, to adjust the clamping height, a second threaded rod 16 is rotatably connected to the middle of the connecting rod 9. A lifting plate 15 is threaded onto the outer side of the second threaded rod 16, and the lifting plate 15 is fixedly welded to the support plate 10. By rotating the second threaded rod 16, the lifting plate 15 can be driven to move up and down along the axial direction of the connecting rod 9, thereby driving the support plate 10 and the clamping plate 13 above it to rise and fall, so as to accommodate workpieces of different heights.

[0025] In this embodiment, to adjust the clamping contact area, the clamping plate 13 is preferably composed of a short clamping plate 21 and a long clamping plate 22. The short clamping plate 21 is fixedly disposed at the center of the long clamping plate 22, and the two are tightly fitted together. To ensure the stability of the adjusted angle, a locking mechanism is designed: as shown in the attached figure. Figure 3 As shown, a fixing plate 17 is fixedly welded to the lower part of the rotating rod 12. A spring 18, serving as a reset element, is sleeved between the fixing plate 17 and the fixing plate 11. Two sets of locking rods 20 are fixedly welded to the lower end of the clamping plate 13. Correspondingly, two sets of locking holes 19 for engagement are provided at the upper end of the fixing plate 11. When it is necessary to adjust the angle of the clamping plate, the rotating rod 12 is lifted upward to disengage the locking rods 20 from the locking holes 19, allowing it to rotate. After adjustment, it is released, and the elastic force of the spring 18 pushes the fixing plate 17, causing the locking rods 20 to automatically insert into the locking holes 19, thus completing a reliable lock.

[0026] For ease of operation and maintenance, a control slot 23 is provided inside the processing table 1. The first bevel gear 3 is connected to a rotating cap 4 via a shaft. The rotating cap 4 is located inside the control slot 23 for easy operation by the operator. A stop door 24 is connected to the upper rotating shaft of the control slot 23, and a contact plate 25 is provided on one side for support. This allows the slot to be closed when not in use, keeping the surface of the processing table 1 flat. In addition, a maintenance door 14 is connected to the lower rotating shaft of the moving slot 2, which can be opened periodically to clean mechanical debris generated inside the moving slot 2.

[0027] The specific working principle of this utility model is as follows:

[0028] In use, this invention first adjusts the clamping angle by lifting and rotating the rotating rod 12 according to the workpiece size, selecting either the long clamping plate 22 or the short clamping plate 21 to contact the workpiece. After releasing, the locking rod 20, under the action of the spring 18, automatically inserts into the locking hole 19 to lock the clamping plate angle. Next, by rotating the rotating cap 4, the first bevel gear 3 drives the second bevel gears 5 on both sides to rotate in opposite directions, thereby driving the first threaded rod 6 to rotate, causing the two moving blocks 7 and the clamping plate 13 to move synchronously towards the center, quickly and accurately fixing the workpiece in the middle of the processing table 1. Then, according to the workpiece height, the second threaded rod 16 is rotated, causing the lifting plate 15 and the support plate 10 to move up and down, thereby adjusting the clamping plate 13 to the optimal clamping height. After completing the above steps, the workpiece can be processed.

[0029] 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 machining fixture, characterized in that, The assembly includes a processing table (1), a moving groove (2), a control groove (23), a first bevel gear (3), a first threaded rod (6), a moving block (7), a connecting groove (8), a connecting rod (9), a support plate (10), a fixing plate (11), a rotating rod (12), and a clamping plate (13). The processing table (1) has the moving groove (2) and the control groove (23) inside. The moving groove (2) is located inside the processing table (1) along the center line. Two first threaded rods (6) are provided in the moving groove (2). A moving block (7) is fitted in the middle of the first threaded rod (6). The moving block (7) meshes with the first threaded rod (6) for transmission. One end of the first threaded rod (6) is provided with a second bevel gear (5), and the other end is rotatably connected to the inside of the processing table (1). The two second bevel gears (5) mesh with the first bevel gear (3). The top of the moving groove (2) is also provided with the connecting groove (8). The connecting rod (9) passes through the connecting groove (8) and is fixed to the moving block (7). The connecting rod (9) is slidably connected to the support plate (10). The upper end of the support plate (10) is fixedly provided with the fixing plate (11). The center of the fixing plate (11) is rotatably provided with the rotating rod (12). The top of the rotating rod (12) is fixedly provided with the clamping plate (13).

2. The machining fixture according to claim 1, characterized in that, It also includes a lifting plate (15) and a second threaded rod (16). The second threaded rod (16) is rotatably connected to the middle of the connecting rod (9), and the lifting plate (15) is engaged on the outer side of the second threaded rod (16). The lifting plate (15) is fixedly connected to the support plate (10).

3. The machining fixture according to claim 1, characterized in that, It also includes a fixing plate (17), a spring (18), a locking hole (19), and a locking rod (20). The lower part of the rotating rod (12) is fixedly provided with a fixing plate (17), and the spring (18) is also sleeved between the fixing plate (17) and the fixing plate (11). The lower end of the clamping plate (13) is fixedly connected with two sets of locking rods (20), and the upper end of the fixing plate (11) is provided with two sets of locking holes (19) for cooperating with the locking rods (20).

4. The machining fixture according to claim 1, characterized in that, One end of the rotating cap (4) is connected to the first bevel gear (3), and the other end is located inside the control groove (23).

5. The machining fixture according to claim 1, characterized in that, It also includes a stop door and a contact plate (25). The upper shaft of the control groove (23) is connected to the stop door (24), and the upper part of the control groove (23) is fixedly connected to the contact plate (25) near the rotating cap (4).

6. The machining fixture according to claim 1, characterized in that, It also includes a maintenance door, and a maintenance door (14) is provided at the lower end of the moving slot (2).

7. The machining fixture according to claim 1, characterized in that, It also includes a short clamp (21) and a long clamp (22). The clamp (13) is composed of a short clamp (21) and a long clamp (22) of rounded rectangle. The short clamp (21) is fixedly disposed at the center of the long clamp (22).

Images