Fixing clamp for internal thread machining

Abstract

The utility model discloses a stationary fixture for internal thread processing, which comprises a base, the middle of the lower end of the base is in threaded connection with a third screw rod, the lower end of the third screw rod is fixedly connected with a second hand wheel, a lower clamping plate is arranged above the base, and an upper clamping plate is arranged right above the lower clamping plate. A hinge is fixedly connected to the upper end of the lower clamping plate, clamping blocks are fixedly connected to the opposite ends of the upper clamping plate and the lower clamping plate correspondingly, a rectangular cavity is formed in the middle of each clamping block, a pre-tightening plate is slidably connected to the side wall of each cavity, and a second lead screw is rotatably connected to the middle of one end of each pre-tightening plate; the end, away from the pre-tightening plate, of the second lead screw is fixedly connected with a rotary knob. The workpiece is clamped through the clamping blocks on the upper clamping plate and the lower clamping plate, the clamping force locally applied to the workpiece is further improved through the pre-tightening plates in the clamping blocks, the fixing effect on the workpiece is improved, the upper clamping plate and the lower clamping plate are pushed to ascend and descend through the third lead screw, and therefore the height of the workpiece is changed.

Description

Technical Field

[0001] The utility model relates to the technical field of fixing fixtures, in particular to a fixing fixture for internal thread processing. Background Art

[0002] Threads are the most common connection method for mechanical parts and are divided into two types: internal and external threads. Internal threading can be processed through four methods: tapping, turning, extrusion, and thread milling, with tapping being the most widely used.

[0003] Before machining internal threads, a fixture is required to fix the workpiece. Commonly used fixtures directly clamp the workpiece surface and use friction to fix the workpiece, which has limited fixing effect on the workpiece. Utility Model Content

[0004] The purpose of the utility model is to provide a fixing fixture for internal thread processing, which can strengthen the clamping force applied to a part of the workpiece while clamping the workpiece to prevent the workpiece from rotating.

[0005] To achieve the above-mentioned purpose, a fixing fixture for internal thread processing is provided, including a base, a third screw rod is threadedly connected to the middle part of the lower end of the base, and the upper end of the third screw rod passes through the base and extends above the base, the lower end of the third screw rod is fixedly connected to the second hand wheel, a lower clamping plate is provided above the base, and the upper end of the third screw rod extends into the lower clamping plate and is rotatably connected to the lower clamping plate, an upper clamping plate is provided just above the lower clamping plate, and the upper clamping plate and the lower clamping plate are symmetrical with each other and combined into an X shape, the upper end of the lower clamping plate is fixedly connected to a hinge, and the upper clamping plate and the lower clamping plate are rotatably connected by the hinge, the The upper and lower clamping plates are fixedly connected to opposite ends thereof, and the clamping blocks are respectively located at one end of the upper and lower clamping plates. A rectangular chamber is provided in the middle of the clamping block, and the chamber passes through the clamping block. A pre-tightening plate is slidably connected to the side wall of the chamber. A second screw is rotatably connected to the middle of one end of the pre-tightening plate, and the second screw is respectively located at the opposite end of the pre-tightening plate in the upper and lower clamping plates. The end of the second screw away from the pre-tightening plate passes through the upper and lower clamping plates, and the second screw is threadedly connected to the upper and lower clamping plates, respectively. A knob is fixedly connected to the end of the second screw away from the pre-tightening plate. This can strengthen the clamping force applied locally to the workpiece while clamping the workpiece to prevent the workpiece from rotating.

[0006] According to the fixing fixture for internal thread processing, a first screw is provided at the middle portion of the lower end of the lower clamping plate, and the first screw penetrates upwardly the lower clamping plate and is threadedly connected to the lower clamping plate, the upper end of the first screw is rotatably connected to a rotating seat, and the upper end of the first screw extends into the rotating seat, the upper end of the rotating seat is fixedly connected to a support frame, the middle portion of the lower end of the upper clamping plate is fixedly connected to a rotating plate, and the rotating plate is located at one end of the upper clamping plate, the rotating plate extends to the middle portion of the supporting frame and is rotatably connected to the supporting frame, the middle portion of the supporting frame is fixedly connected to a rotating shaft, and the rotating shaft penetrates the middle portion of the rotating plate and is rotatably connected to the rotating plate, and the lower end of the first screw is fixedly connected to a first handwheel, which is used to adjust the opening and closing of the clamp and fix the workpiece.

[0007] According to the fixing fixture for internal thread processing, arc grooves are respectively provided in the middle of the opposite ends of the clamping block, and the pre-tightening plate is located in the middle of the arc groove, thereby increasing the contact surface between the clamping block and the workpiece and improving the fixing effect of the workpiece.

[0008] According to the fixing fixture for internal thread processing, two L-shaped guide plates are symmetrically fixedly connected to both sides of the lower clamping plate, and the lower ends of the guide plates extend downward through the base. The guide plates are slidably connected to the base, playing a guiding role and improving stability when adjusting the height of the workpiece.

[0009] According to the fixing fixture for internal thread processing, the lower end of the base is fixedly connected with L-shaped support legs, and the support legs are respectively located at the four corners of the base, and the lower ends of the support legs are provided with threaded holes for installing the device.

[0010] According to the fixing fixture for internal thread processing, a non-slip rubber pad is fixedly connected to one end of the pre-tightening plate, and the non-slip rubber pad is located at the opposite end of the pre-tightening plate. The arcuate groove of the clamping block and the surface of the non-slip rubber pad are provided with non-slip patterns, and the non-slip patterns on the surface of the non-slip rubber pad overlap with the anti-slip patterns on the arcuate groove, thereby increasing the friction of the device surface.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the workpiece is clamped by the clamping blocks on the upper and lower clamping plates, and the pre-tightening plates in the clamping blocks are used to further increase the clamping force applied locally to the workpiece, thereby improving the fixing effect of the workpiece.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1This is a three-dimensional diagram of a fixing fixture for internal thread processing according to the present invention;

[0015] Figure 2 This is a cross-sectional view of a fixing fixture for internal thread processing according to the present utility model;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a three-dimensional diagram of a pre-tightening plate of a fixing fixture for internal thread processing according to the present invention.

[0018] In the figure: 1. Upper clamping plate; 2. Lower clamping plate; 3. Guide plate; 4. Support leg; 5. Base; 6. Clamping block; 7. Knob; 8. Hinge; 9. First screw; 10. First handwheel; 11. Second handwheel; 12. Chamber; 13. Preload plate; 14. Second screw; 15. Third screw; 16. Rotating plate; 17. Rotating shaft; 18. Rotating seat; 19. Support frame; 20. Anti-slip rubber pad. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0020] See also Figure 1-4The utility model provides a technical solution: a fixing fixture for internal thread processing, comprising a base 5, the lower end of the base 5 is fixedly connected to an L-shaped support leg 4, and the support leg 4 is respectively located at the four corners of the base 5, and the lower end of the support leg 4 is provided with a threaded hole for installing the device. A third screw rod 15 is threadedly connected to the middle part of the lower end of the base 5, and the upper end of the third screw rod 15 passes through the base 5 and extends to the top of the base 5, the lower end of the third screw rod 15 is fixedly connected to a second hand wheel 11, a lower clamping plate 2 is provided above the base 5, and the upper end of the third screw rod 15 extends into the lower clamping plate 2 and is rotatably connected to the lower clamping plate 2, two L-shaped guide plates 3 are symmetrically fixedly connected to the two side ends of the lower clamping plate 2, and the lower end of the guide plate 3 passes through the base 5 downward, and the guide plate 3 is slidably connected to the base 5, playing a guiding role, thereby improving the stability when adjusting the height of the workpiece. An upper splint 1 is provided directly above the lower splint 2, and the upper splint 1 and the lower splint 2 are symmetrical with each other and combined into an X shape. A first screw rod 9 is provided in the middle of the lower end of the lower splint 2, and the first screw rod 9 passes through the lower splint 2 upward and is threadedly connected to the lower splint 2. The upper end of the first screw rod 9 is rotatably connected to a rotating seat 18, and the upper end of the first screw rod 9 extends into the rotating seat 18, and the upper end of the rotating seat 18 is fixedly connected to a support frame 19, and the middle of the lower end of the upper splint 1 is fixedly connected to a rotating plate 16, and the rotating plate 16 is located at one end of the upper splint 1, and the rotating plate 16 extends to the middle of the support frame 19 and is rotatably connected to the support frame 19, and the middle of the support frame 19 is fixedly connected to a rotating shaft 17, and the rotating shaft 17 passes through the middle of the rotating plate 16 and is rotatably connected to the rotating plate 16, and the lower end of the first screw rod 9 is fixedly connected to a first handwheel 10, which is used to adjust the opening and closing of the clamp and fix the workpiece. The upper end of the lower clamping plate 2 is fixedly connected to a hinge 8, and the upper clamping plate 1 and the lower clamping plate 2 are rotatably connected by the hinge 8. The opposite ends of the upper clamping plate 1 and the lower clamping plate 2 are respectively fixedly connected to a clamping block 6, and the clamping block 6 is respectively located at one end of the upper clamping plate 1 and the lower clamping plate 2. A rectangular chamber 12 is provided in the middle of the clamping block 6, and the chamber 12 passes through the clamping block 6. A pre-tightening plate 13 is slidably connected to the side wall of the chamber 12. An arc groove is provided in the middle of the opposite ends of the clamping block 6, and the pre-tightening plate 13 is located in the middle of the arc groove, thereby increasing the contact surface with the workpiece and improving the fixing effect on the workpiece. One end of the pre-tightening plate 13 is fixedly connected to an anti-slip rubber pad 20, and the anti-slip rubber pad 20 is located at the opposite end of the pre-tightening plate 13. The surfaces of the arc groove of the clamping block 6 and the anti-slip rubber pad 20 are provided with anti-slip patterns, and the anti-slip pattern on the surface of the anti-slip rubber pad 20 overlaps with the anti-slip pattern of the arc groove, thereby increasing the friction of the device surface. A second screw rod 14 is rotatably connected to the middle part of one end of the pre-tightening plate 13, and the second screw rod 14 is respectively located at the opposite ends of the pre-tightening plate 13 in the upper splint 1 and the lower splint 2, and the end of the second screw rod 14 away from the pre-tightening plate 13 passes through the upper splint 1 and the lower splint 2 respectively, and the second screw rod 14 is threadedly connected to the upper splint 1 and the lower splint 2 respectively, and the end of the second screw rod 14 away from the pre-tightening plate 13 is fixedly connected to the knob 7.

[0021] Working principle: When in use, place the workpiece into the clamping block 6 on the lower clamping plate 2, rotate the first screw rod 9 through the first hand wheel 10, so that the first screw rod 9 rises and pushes the clamping block 6 on the upper clamping plate 1 to clamp the workpiece, and then rotate the knobs 7 on the upper clamping plate 1 and the lower clamping plate 2 respectively, so that the second screw rod 14 pushes the pre-tightening plate 13 to apply pressure to the upper and lower ends of the workpiece respectively, and finally rotate the third screw rod 15 through the second hand wheel 11 to change the height of the workpiece.

[0022] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A fixing fixture for internal thread processing, comprising a base (5), characterized in that: The middle part of the lower end of the base (5) is threadedly connected to a third screw rod (15), and the upper end of the third screw rod (15) passes through the base (5) and extends to the top of the base (5), the lower end of the third screw rod (15) is fixedly connected to a second hand wheel (11), a lower clamping plate (2) is provided above the base (5), and the upper end of the third screw rod (15) extends into the lower clamping plate (2) and is rotatably connected to the lower clamping plate (2), an upper clamping plate (1) is provided just above the lower clamping plate (2), and the upper clamping plate (1) and the lower clamping plate (2) are symmetrical to each other and combined into an X shape, the upper end of the lower clamping plate (2) is fixedly connected to a hinge (8), and the upper clamping plate (1) and the lower clamping plate (2) are rotatably connected through the hinge (8), and the opposite ends of the upper clamping plate (1) and the lower clamping plate (2) are respectively fixedly connected to clamping blocks (6 ), and the clamping blocks (6) are respectively located at one end of the upper clamping plate (1) and the lower clamping plate (2), a rectangular chamber (12) is provided in the middle of the clamping block (6), and the chamber (12) passes through the clamping block (6), and the side wall of the chamber (12) is slidably connected with a pre-tightening plate (13), and the middle of one end of the pre-tightening plate (13) is rotatably connected with a second screw rod (14), and the second screw rod (14) is respectively located at the opposite ends of the pre-tightening plate (13) in the upper clamping plate (1) and the lower clamping plate (2), and the second screw rod (14) is respectively threadedly connected to the upper clamping plate (1) and the lower clamping plate (2), and the second screw rod (14) is fixedly connected to the knob (7) at one end of the second screw rod (14) away from the pre-tightening plate (13).

2. A fixing fixture for internal thread processing according to claim 1, characterized in that: The middle part of the lower end of the lower splint (2) is provided with a first screw rod (9), and the first screw rod (9) passes through the lower splint (2) upward and is threadedly connected to the lower splint (2), the upper end of the first screw rod (9) is rotatably connected to a rotating seat (18), and the upper end of the first screw rod (9) extends into the rotating seat (18), the upper end of the rotating seat (18) is fixedly connected to a support frame (19), the middle part of the lower end of the upper splint (1) is fixedly connected to a rotating plate (16), and the rotating plate (16) is located at one end of the upper splint (1), the rotating plate (16) extends to the middle part of the support frame (19) and is rotatably connected to the support frame (19), the middle part of the support frame (19) is fixedly connected to a rotating shaft (17), and the rotating shaft (17) passes through the middle part of the rotating plate (16) and is rotatably connected to the rotating plate (16), and the lower end of the first screw rod (9) is fixedly connected to a first hand wheel (10).

3. The fixing fixture for internal thread processing according to claim 1, characterized in that: The middle parts of the opposite ends of the clamping block (6) are respectively provided with arc-shaped grooves, and the pre-tightening plate (13) is located in the middle of the arc-shaped grooves.

4. The fixing fixture for internal thread processing according to claim 1, characterized in that: Two L-shaped guide plates (3) are symmetrically fixedly connected to both side ends of the lower clamping plate (2), and the lower ends of the guide plates (3) pass through the base (5) downward, and the guide plates (3) are slidably connected to the base (5).

5. The fixing fixture for internal thread processing according to claim 1, characterized in that: The lower end of the base (5) is fixedly connected to an L-shaped support leg (4), and the support leg (4) is respectively located at the four corners of the base (5), and the lower end of the support leg (4) is provided with a threaded hole.

6. A fixing fixture for internal thread processing according to claim 2, characterized in that: One end of the pre-tightening plate (13) is fixedly connected to a non-slip rubber pad (20), and the non-slip rubber pad (20) is located at the opposite end of the pre-tightening plate (13), and the arc groove of the clamping block (6) and the surface of the non-slip rubber pad (20) are provided with non-slip patterns, and the non-slip pattern on the surface of the non-slip rubber pad (20) coincides with the non-slip pattern of the arc groove.

Images