Outer shear positioning machining tool convenient to adjust

Abstract

The utility model discloses a kind of outer scissors positioning machining frock of being convenient for adjusting, including base and mounting table, two groups of symmetrically distributed adjusting blocks are slidably installed on the mounting table, two-way screw rod is equipped in the mounting table, first rotating block is equipped in the adjusting block, two groups of symmetrically distributed second rotating block are equipped in the first rotating block, two groups of symmetrically distributed third rotating block are rotatably installed in the second rotating block, rubber pad is fixedly bonded on four groups of third rotating block, sliding block is fixedly installed on the third rotating block, second rotating block and first rotating block, sliding slot is set on the second rotating block, first rotating block and adjusting block, symmetrically distributed adjusting block is synchronously moved towards or away from by two-way screw rod drive, cooperate multistage rotating block linkage mechanism, i.

Description

Technical Field

[0001] This utility model relates to the field of external scissor positioning and processing technology, specifically to an easily adjustable external scissor positioning and processing tooling. Background Technology

[0002] In the hardware tool manufacturing industry, external shears are an important cutting tool whose performance directly affects the effects of various applications, from daily household cutting to industrial precision cutting. With the continuous improvement of the requirements of modern manufacturing for tool precision and service life, the processing technology of external shears is facing new challenges. At present, in the production process of external shears, the traditional processing method mainly relies on the experience and technical level of the operators, and uses ordinary clamps for clamping and positioning.

[0003] In the existing technology, since the blades of scissors are mostly irregular curved surfaces and the dimensions of different models vary greatly, existing fixed tooling often has poor adaptability and requires frequent replacement or manual adjustment, resulting in low processing efficiency and difficulty in guaranteeing accuracy. In addition, scissor processing often requires multi-angle cutting or grinding, while ordinary fixtures lack flexible angle adjustment functions. During operation, repeated disassembly and assembly or the use of auxiliary tools for positioning are required, which not only increases labor intensity, but also makes it easy for human error to affect the quality of finished products. Utility Model Content

[0004] The purpose of this invention is to provide an easily adjustable external shear positioning and machining fixture to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an easily adjustable external scissor positioning machining fixture, comprising a base and a mounting platform. Two sets of symmetrically distributed adjusting blocks are slidably mounted on the mounting platform. A bidirectional lead screw is provided inside the mounting platform. A first rotating block is provided inside the adjusting block. Two sets of symmetrically distributed second rotating blocks are provided inside the first rotating block. Two sets of symmetrically distributed third rotating blocks are rotatably mounted inside each of the two sets of second rotating blocks. Rubber pads are fixedly adhered to each of the four sets of third rotating blocks. Slider blocks are fixedly mounted on each of the third rotating blocks, second rotating blocks, and first rotating blocks. Sliding grooves are provided on each of the second rotating blocks, first rotating blocks, and adjusting blocks.

[0006] As a further preferred embodiment of this technical solution, the third rotating block is slidably connected to the corresponding second rotating block via a slider and a groove, the second rotating block is slidably connected to the first rotating block via a slider and a groove, and the first rotating block is slidably connected to the adjusting block via a slider and a groove.

[0007] As a further preferred embodiment of this technical solution, both ends of the bidirectional lead screw pass through the mounting platform and are rotatably connected to the mounting platform via rolling bearings. Both ends of the bidirectional lead screw pass through two sets of adjusting blocks and are threadedly connected to the two sets of adjusting blocks respectively.

[0008] As a further preferred embodiment of this technical solution, a mounting column is rotatably installed inside the base, the mounting platform is rotatably connected to the mounting column via a rotating rod, a first worm gear is sleeved on the mounting column, a first worm is rotatably installed inside the base, the first worm is meshed with the first worm gear, a mounting rod is rotatably installed inside the mounting column, a first angle sensor is fixedly installed on the base, and a second angle sensor is fixedly installed on the mounting column.

[0009] As a further preferred embodiment of this technical solution, the mounting rod and the rotating rod are perpendicularly distributed, a first bevel gear is sleeved on the mounting rod, and a second bevel gear is sleeved on the rotating rod, with the second bevel gear meshing with the first bevel gear.

[0010] As a further preferred embodiment of this technical solution, a second worm gear is sleeved on the mounting rod, and a second worm is rotatably mounted inside the mounting column, with the second worm meshing with the second worm gear.

[0011] As a further preferred embodiment of this technical solution, the first worm gear is coaxially and fixedly connected to the output shaft of the first angle sensor via a coupling, and the second worm gear is coaxially and fixedly connected to the output shaft of the second angle sensor via a coupling.

[0012] This utility model provides an easily adjustable external scissor positioning and machining fixture, which has the following advantages:

[0013] (1) This utility model uses a bidirectional lead screw to drive symmetrically distributed adjustment blocks to move synchronously in opposite directions or in opposite directions. Combined with the multi-stage rotating block linkage mechanism, namely the slider groove structure of the first rotating block, the second rotating block and the third rotating block, it realizes the adaptive clamping of the scissor blade. The rubber pad fits tightly with the irregular curved surface, effectively avoiding scratches while adapting to different models and sizes of scissors. It significantly reduces the frequency of tooling changes and improves processing efficiency. During operation, only the bidirectional lead screw and worm gear need to be adjusted to complete the clamping and positioning and multi-angle processing requirements, greatly reducing labor intensity. The multi-directional sliding rotating block group realizes the rapid adaptive fixation of irregular blades, and the clamping stability is improved compared with traditional fixtures.

[0014] (2) This utility model adopts a combination of a first worm gear, a first worm drive, a first bevel gear, and a second bevel gear in the angle adjustment mechanism. The first worm drives the mounting column to rotate horizontally, and the second worm drives the rotating rod to swing vertically. Combined with real-time feedback from dual angle sensors, it ensures that the cutting and grinding angles are accurate and controllable, eliminates manual positioning errors, and the dual-axis linkage angle adjustment system can achieve 360° horizontal rotation and ±90° vertical tilt. With the sensor closed-loop control, the processing angle accuracy is improved, meeting the requirements for high-precision shear blade surface processing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the structural separation of the mounting platform and the adjusting block of this utility model;

[0017] Figure 3 This is a schematic diagram showing the structural separation of the third rotating block, the second rotating block, and the first rotating block of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the base of this utility model;

[0019] In the diagram: 1. Base; 2. Mounting column; 3. Mounting platform; 4. Adjusting block; 5. Two-way lead screw; 6. First rotating block; 7. Second rotating block; 8. Third rotating block; 9. Rubber pad; 10. Slider; 11. Slide groove; 12. First worm gear; 13. First worm; 14. First angle sensor; 15. Mounting rod; 16. Second worm gear; 17. Second worm; 18. Second angle sensor; 19. Rotating rod; 20. First bevel gear; 21. Second bevel gear. Detailed Implementation

[0020] 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.

[0021] This utility model provides a technical solution: such as Figure 1 , Figure 2 and Figure 3As shown in this embodiment, an easily adjustable external scissor positioning machining fixture includes a base 1 and a mounting platform 3. Two sets of symmetrically distributed adjusting blocks 44 are slidably mounted on the mounting platform 3. A bidirectional lead screw 5 is provided inside the mounting platform 3. A first rotating block 6 is provided inside the adjusting block 44. Two sets of symmetrically distributed second rotating blocks 7 are provided inside the first rotating block 6. Two sets of symmetrically distributed third rotating blocks 8 are rotatably mounted inside each of the two sets of second rotating blocks 7. Rubber pads 9 are fixedly adhered to each of the four sets of third rotating blocks 8. Slider blocks 10 are fixedly mounted on each of the third rotating blocks 8, the second rotating blocks 7, and the first rotating blocks 6. Sliding grooves 11 are provided on each of the second rotating blocks 7, the first rotating blocks 6, and the adjusting blocks 44. The third rotating block 8 is slidably connected to the corresponding second rotating block 7 via the slider 10 and the slide groove 11. The second rotating block 7 is slidably connected to the first rotating block 6 via the slider 10 and the slide groove 11. The first rotating block 6 is slidably connected to the adjusting block 44 via the slider 10 and the slide groove 11. The two ends of the bidirectional lead screw 5 pass through the mounting platform 3 and are rotatably connected to the mounting platform 3 via rolling bearings. The two ends of the bidirectional lead screw 5 pass through two sets of adjusting blocks 44 and are threadedly connected to the two sets of adjusting blocks 44 respectively. The motor on the mounting platform 3 drives the bidirectional lead screw 5 to rotate. The rotation of the bidirectional lead screw 5 drives the two sets of adjusting blocks 44 to move synchronously, causing the first rotating block 6 to slide along the slide groove 11 of the adjusting block 44. When the scissor blade contacts the rubber pad 9, the third rotating block 8 is subjected to pressure and adaptively deflects along the slide groove 11 of the second rotating block 7 via the slider 10. At the same time, the second rotating block 7 adjusts its angle along the slide groove 11 of the first rotating block 6, forming a three-level linkage compensation. The multi-directional degree of freedom ensures that the four sets of rubber pads 9 always maintain surface contact with the irregularly shaped blade surface. While ensuring a uniform distribution of clamping force, it avoids local stress concentration and ensures that scissors of different sizes and curvatures can be stably fixed.

[0022] like Figure 4As shown, a mounting column 2 is rotatably installed inside the base 1. The mounting platform 3 is rotatably connected to the mounting column 2 via a rotating rod 19. A first worm gear 12 is sleeved on the mounting column 2. A first worm 13 is rotatably installed inside the base 1, and the first worm 13 meshes with the first worm gear 12. A mounting rod 15 is rotatably installed inside the mounting column 2. A first angle sensor 14 is fixedly installed on the base 1. A second angle sensor 18 is fixedly installed on the mounting column 2. The mounting rod 15 and the rotating rod 19 are perpendicularly distributed. A first bevel gear 20 is sleeved on the mounting rod 15. A second bevel gear 21 is sleeved on the rotating rod 19, and the second bevel gear 21 meshes with the first bevel gear 20. A second worm gear 16 is sleeved on the mounting rod 15. A second worm 17 is rotatably installed inside the mounting column 2, and the second worm 17 meshes with the second worm gear 16. The first worm 13 is connected to the first angle sensor via a coupling. The output shaft of 14 is coaxially fixedly connected, and the second worm gear 17 is coaxially fixedly connected to the output shaft of the second angle sensor 18 through a coupling. The horizontal angle adjustment is driven by the motor on the base 1 to rotate the first worm gear 13. The first worm gear 13 drives the first worm wheel 12, which drives the mounting column 2 and the mounting platform 3 to rotate as a whole. The first angle sensor 14 monitors the rotation angle in real time and performs closed-loop control. The vertical angle adjustment is driven by the motor on the mounting column 2 to rotate the second worm gear 17. The second worm gear 17 drives the second worm wheel 16, and the power is transmitted to the rotating rod 19 through the first bevel gear 20 and the second bevel gear 21 on the mounting rod 15, so as to realize the pitch swing of the mounting platform 3. The second angle sensor 18 synchronously feeds back the angle data. The dual-axis worm gear transmission has a self-locking characteristic to ensure that there is no drift after positioning at any angle, which meets the precise and coordinated control requirements for horizontal rotation and vertical tilt in multi-process processing.

[0023] This utility model provides an easily adjustable external scissor positioning and machining fixture. The specific working principle is as follows: A motor on the mounting platform 3 drives a bidirectional lead screw 5 to rotate. The rotation of the bidirectional lead screw 5 drives two sets of adjusting blocks 44 to move synchronously, causing the first rotating block 6 to slide along the sliding groove 11 of the adjusting block 44. When the scissor blade contacts the rubber pad 9, the third rotating block 8 is subjected to pressure and adaptively deflects along the sliding groove 11 of the second rotating block 7 via the slider 10. Simultaneously, the second rotating block 7 adjusts its angle along the sliding groove 11 of the first rotating block 6, forming a three-level linkage compensation. The multi-directional degrees of freedom ensure that the four sets of rubber pads 9 always maintain surface contact with the irregularly shaped blade surface, ensuring uniform distribution of clamping force while avoiding local stress concentration. This ensures that scissors of different sizes and curvatures can be stably fixed. The horizontal angle adjustment is achieved by a motor on the base 1 driving the first worm gear 13 to rotate. The first worm gear 13 drives the first worm wheel 12, which in turn drives the mounting column 2 and the mounting plate. The mounting platform 3 rotates as a whole. The first angle sensor 14 monitors the rotation angle in real time and controls it in a closed loop. The vertical angle is adjusted by the motor on the mounting column 2 driving the second worm gear 17 to rotate. The second worm gear 17 drives the second worm wheel 16, and the power is transmitted to the rotating rod 19 through the first bevel gear 20 and the second bevel gear 21 on the mounting rod 15, so as to realize the pitch swing of the mounting platform 3. The second angle sensor 18 synchronously feeds back the angle data. The dual-axis worm gear transmission has a self-locking characteristic to ensure that there is no drift after positioning at any angle, which meets the precise and coordinated control requirements of horizontal rotation and vertical tilt in multi-process processing.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An easily adjustable external shear positioning machining fixture, comprising a base (1) and a mounting platform (3), characterized in that: Two sets of symmetrically distributed adjusting blocks (4) are slidably installed on the mounting platform (3). A two-way lead screw (5) is provided in the mounting platform (3). A first rotating block (6) is provided in the adjusting block (4). Two sets of symmetrically distributed second rotating blocks (7) are provided in the first rotating block (6). Two sets of symmetrically distributed third rotating blocks (8) are rotatably installed in each of the two sets of second rotating blocks (7). Rubber pads (9) are fixedly bonded to each of the four sets of third rotating blocks (8). Slider blocks (10) are fixedly installed on the third rotating block (8), the second rotating block (7) and the first rotating block (6). Slide grooves (11) are opened on the second rotating block (7), the first rotating block (6) and the adjusting block (4).

2. The easily adjustable external scissor positioning and machining fixture according to claim 1, characterized in that: The third rotating block (8) is slidably connected to the corresponding second rotating block (7) through a slider (10) and a groove (11). The second rotating block (7) is slidably connected to the first rotating block (6) through a slider (10) and a groove (11). The first rotating block (6) is slidably connected to the adjusting block (4) through a slider (10) and a groove (11).

3. The easily adjustable external scissor positioning and machining fixture according to claim 1, characterized in that: The two ends of the bidirectional lead screw (5) pass through the mounting platform (3) and are rotatably connected to the mounting platform (3) through rolling bearings. The two ends of the bidirectional lead screw (5) pass through two sets of adjusting blocks (4) and are threadedly connected to the two sets of adjusting blocks (4) respectively.

4. The easily adjustable external scissor positioning and machining fixture according to claim 1, characterized in that: An installation column (2) is rotatably installed inside the base (1). The installation platform (3) is rotatably connected to the installation column (2) via a rotating rod (19). A first worm gear (12) is sleeved on the installation column (2). A first worm (13) is rotatably installed inside the base (1). The first worm (13) is meshed with the first worm gear (12). An installation rod (15) is rotatably installed inside the installation column (2). A first angle sensor (14) is fixedly installed on the base (1). A second angle sensor (18) is fixedly installed on the installation column (2).

5. The easily adjustable external scissor positioning and machining fixture according to claim 4, characterized in that: The mounting rod (15) and the rotating rod (19) are vertically distributed. A first bevel gear (20) is sleeved on the mounting rod (15), and a second bevel gear (21) is sleeved on the rotating rod (19). The second bevel gear (21) meshes with the first bevel gear (20).

6. The easily adjustable external scissor positioning and machining fixture according to claim 4, characterized in that: A second worm gear (16) is sleeved on the mounting rod (15), and a second worm (17) is rotatably installed inside the mounting column (2). The second worm (17) is meshed with the second worm gear (16).

7. The easily adjustable external scissor positioning and machining fixture according to claim 6, characterized in that: The first worm (13) is coaxially and fixedly connected to the output shaft of the first angle sensor (14) via a coupling, and the second worm (17) is coaxially and fixedly connected to the output shaft of the second angle sensor (18) via a coupling.

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