Clamp device for drawing forming of dove-tail rib

Abstract

The utility model relates to a clamp device for drawing and forming a dove tail rib. The clamp device comprises a sliding seat, a connecting frame is arranged at one end of the sliding seat, a kidney-shaped hole is formed in the connecting frame, the long axis of the kidney-shaped hole is parallel to a guide rod, the connecting frame is connected with a connecting rod, the connecting rod is provided with a connecting shaft inserted into the kidney-shaped hole, and one end of the connecting rod is connected to an oil cylinder; a clamp cavity is formed in the end, facing a workpiece, of the sliding base, a pair of clamp bodies is installed in the clamp cavity, the two side walls of the clamp cavity are obliquely arranged so that an opening of the clamp cavity can be gradually reduced from inside to outside, the upper surface and the lower surface of the sliding base are each provided with a long through hole corresponding to the two clamp bodies, and the long through holes are communicated with the clamp cavity. Connecting pins A are arranged on the upper face and the lower face of the clamp body, the connecting pins A extend out of the long through hole outwards and are provided with connecting rod mechanisms, the connecting rod mechanisms are connected with the connecting rods, and when the connecting rods are pulled backwards, the connecting pins A are pushed through the connecting rod mechanisms to enable the clamp body to extend forwards. According to the utility model, large clamping force can be provided; and the operation of clamping and loosening the workpiece is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of dove-tail rib processing, in particular to a clamp device for the drawing and forming of dove-tail ribs. Background Technique

[0002] The dove-tail rib is a component of a hydraulic generator. The shape of the dove-tail rib is a straight line and its length is relatively long. Its cross-section is a bit similar to a pigeon's tail, so it is called a dove-tail rib in this field. In fact, there are various specific shapes of its cross-section, which are processed according to design requirements. The outer shape of its cross-section is usually formed by cold drawing, that is, an oil cylinder is used to pull a workpiece through the die hole of a forming die. The outer contour of the workpiece is slightly larger than the die hole, and it is formed by being extruded when passing through the die hole. Due to the large resistance, the workpiece needs to be clamped by a clamp with a strong clamping force. The existing clamp devices have problems of insufficient clamping force and low operation efficiency of loosening the workpiece. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art, and provide a clamp device for the drawing and forming of dove-tail ribs.

[0004] The specific scheme of the utility model is: a clamp device for the drawing and forming of dove-tail ribs, including two guide rods. A slide seat is slidably mounted on the two guide rods. One end of the slide seat is provided with a connecting frame, and a waist-shaped hole is provided on the connecting frame. The long axis of the waist-shaped hole is parallel to the guide rods. The connecting frame is connected with a connecting rod. The connecting rod is provided with a connecting shaft inserted into the waist-shaped hole. One end of the connecting rod is connected to an oil cylinder; one end of the slide seat facing the workpiece is provided with a clamp cavity. A pair of clamp bodies are installed in the clamp cavity. The two side walls of the clamp cavity are inclined so that the opening of the clamp cavity gradually decreases from the inside to the outside. The upper surface and the lower surface of the slide seat are respectively provided with a long through hole corresponding to the two clamp bodies. The long through holes are communicated with the clamp cavity. Both the upper and lower surfaces of the clamp body are provided with connecting pins A. The connecting pins A extend outwards from the long through holes and are equipped with a link mechanism. The link mechanism is connected with the connecting rod. When the connecting rod is pulled backward, the connecting pins A are pushed through the link mechanism to make the clamp bodies extend forward.

[0005] Further, the link mechanism includes a link A. One end of the link A is rotatably connected to the connecting pin A, and the other end is rotatably connected to a link B. The other end of the link B is rotatably connected to a link C. A fixing pin is installed in the middle of the link B. The fixing pin is fixedly connected with the slide seat. The upper and lower surfaces of the connecting rod are respectively equipped with a connecting pin B corresponding to the two clamp bodies. The connecting pin B is rotatably connected to the corresponding link C.

[0006] Further, one side of the two clamp bodies facing each other is a clamping surface, and anti-slip teeth are provided on the clamping surface.

[0007] Further, the connecting frame is composed of two ear plates. The two ear plates are spaced apart by a certain distance. The connecting rod is located between the two ear plates, and the ear plates are welded to the sliding seat.

[0008] The utility model has the following beneficial effects: it can provide a large clamping force to meet the processing requirements; the operations of clamping and loosening the workpiece are both completed by the action of the oil cylinder, and the operation is simple. Description of the Drawings

[0009] Figure 1 is a three-dimensional schematic diagram of the use state of the utility model;

[0010] Figure 2 is Figure 1 the enlarged view at V of

[0011] Figure 3 is Figure 1 the front view of

[0012] Figure 4 is Figure 3 the A-A view of

[0013] Figure 5 is a schematic diagram of the state when the utility model loosens the workpiece;

[0014] In the figure: 1. Guide rod; 2. Sliding seat; 3. Connecting rod; 4. Link mechanism; 41. Link A; 42. Link B; 43. Fixed pin; 44. Link C; 45. Kidney-shaped hole; 46. Connecting pin B; 5. Clamp body; 6. Connecting pin A; 7. Connecting frame; 71. Kidney-shaped hole; 8. Connecting shaft; 9. Workpiece. Detailed Embodiment

[0015] Referring to Figures 1-4 , this embodiment is a clamp device for dovetail rib drawing and forming, including two guide rods 1. A sliding seat 2 is slidably mounted on the two guide rods 1. One end of the sliding seat 2 is provided with a connecting frame 7. The connecting frame 7 is provided with a kidney-shaped hole 71. The long axis of the kidney-shaped hole 71 is parallel to the guide rod 1. The connecting frame 7 is connected with a connecting rod 3. The connecting rod 3 is provided with a connecting shaft 8 inserted into the kidney-shaped hole 45. One end of the connecting rod 3 is connected to the oil cylinder; one end of the sliding seat 2 facing the workpiece 9 is provided with a clamp cavity. A pair of clamp bodies 5 are installed in the clamp cavity. The two side walls of the clamp cavity are inclined so that the opening of the clamp cavity gradually decreases from the inside to the outside. The upper surface and the lower surface of the sliding seat 2 are respectively provided with a long through hole corresponding to the two clamp bodies 5. The long through hole is arranged parallel to the side wall of the clamp cavity and is communicated with the clamp cavity. The upper and lower surfaces of the clamp body 5 are both provided with connecting pins A 6. The connecting pins A 6 extend outwards from the long through hole and are equipped with a link mechanism 4. The link mechanism 4 is connected with the connecting rod 3. When the connecting rod 3 is pulled backward, the connecting pins A 6 are pushed by the link mechanism 4 to make the clamp bodies 5 extend forward.

[0016] Further, the linkage mechanism 4 includes a connecting rod A41. One end of the connecting rod A41 is rotatably connected to a connecting pin A6, and the other end is rotatably connected to a connecting rod B42. The other end of the connecting rod B42 is rotatably connected to a connecting rod C44. A fixing pin 43 is installed in the middle of the connecting rod B42, and the fixing pin 43 is fixedly connected to the sliding seat 2. On the upper and lower surfaces of the connecting rod 3, a connecting pin B46 is installed corresponding to each of the two clamp bodies 5, and the connecting pin B46 is rotatably connected to the corresponding connecting rod C44.

[0017] Further, one side of the two clamp bodies 5 facing each other is a clamping surface, and anti-slip teeth are provided on the clamping surface.

[0018] Further, the connecting frame 7 is composed of two ear plates. The two ear plates are spaced apart by a certain distance. The connecting rod 3 is located between the two ear plates, and the ear plates are welded to the sliding seat 2.

[0019] The working principle of the present invention is as follows: A clamping portion for clamping is provided at the end of the workpiece 9. After passing the clamping portion through the die hole of the mold, then operate the oil cylinder to push the clamp device closer to the workpiece 9. When the oil cylinder extends, the piston rod drives the connecting rod 3 to push forward. The connecting shaft 8 first slides forward a certain distance in the kidney-shaped hole 71 of the connecting frame 7. During the sliding process, the connecting rod 3 pushes the connecting rod C44, and the connecting rod C44 pushes the connecting rod B42 to rotate around the fixing pin 43. The connecting rod B42 drives the connecting rod A41 to pull the two clamp bodies 5 backward, so that the two clamp bodies 5 retract into the clamp cavity. The clamp bodies 5 move along the inclined side wall of the clamp cavity, so that the opening between the two clamp bodies 5 increases to be greater than the width of the clamping portion of the workpiece 9, as Figure 5 shown; When the sliding seat 2 moves to the workpiece 9 and stops, then operate the oil cylinder to contract backward. First, the connecting rod 3 slides backward a certain distance along the kidney-shaped hole 71. At this time, the two clamp bodies 5 are driven to extend outward through the reverse action of the linkage mechanism 4. The two clamp bodies 5 move along the wall surface of the clamp cavity and their openings gradually decrease until they clamp the clamping portion of the workpiece 9 and no longer move. Then, under the pulling force of the oil cylinder, the sliding seat 2 is driven to move backward. The sliding seat 2 pulls the clamp backward through the inclined side wall surface of the clamp cavity, and at the same time forms a component force that squeezes the two clamp bodies 5 toward the middle. The greater the pulling force, the greater the squeezing force on the workpiece 9. Finally, when the workpiece 9 completely passes through the die hole, the drawing forming is completed; Finally, operate the oil cylinder to push forward a small distance, so as to drive the two clamp bodies 5 to release the workpiece 9 through the linkage mechanism 4. At this time, the workpiece 9 can be taken away.

Claims

1. A clamping device for the drawing and forming of dovetail tendons, characterized in that: It includes two guide rods, on which a slide is slidably mounted. One end of the slide is provided with a connecting frame, and the connecting frame is provided with an oblong hole. The long axis of the oblong hole is parallel to the guide rods. The connecting frame is connected with a connecting rod, and the connecting rod is provided with a connecting shaft inserted into the oblong hole. One end of the connecting rod is connected to an oil cylinder; one end of the slide facing the workpiece is provided with a clamp cavity, and a pair of clamp bodies are installed in the clamp cavity. The two side walls of the clamp cavity are inclined so that the opening of the clamp cavity gradually decreases from the inside to the outside. The upper and lower surfaces of the slide respectively have a long through hole corresponding to the two clamp bodies, and the long through hole is communicated with the clamp cavity. Both the upper and lower surfaces of the clamp body are provided with connecting pins A. The connecting pins A extend outwards from the long through holes and are equipped with a linkage mechanism, and the linkage mechanism is connected with the connecting rod. When the connecting rod is pulled backward, the connecting pins A are pushed through the linkage mechanism to make the clamp bodies extend forward.

2. The clamping device for dovetail tendon drawing and forming according to claim 1, characterized in that: The linkage mechanism includes a link A. One end of the link A is rotatably connected to the connecting pin A, and the other end is rotatably connected to a link B. The other end of the link B is rotatably connected to a link C. A fixed pin is installed in the middle of the link B, and the fixed pin is fixedly connected to the slide. The upper and lower surfaces of the connecting rod respectively have a connecting pin B corresponding to the two clamp bodies, and the connecting pin B is rotatably connected to the corresponding link C.

3. The clamping device for dovetail tendon drawing and forming according to claim 1, characterized in that: The opposite sides of the two clamp bodies are clamping surfaces, and anti-slip sawteeth are provided on the clamping surfaces.

4. The clamp device for dovetail tendon drawing and forming according to claim 1, characterized in that: The connecting frame is composed of two ear plates. The two ear plates are spaced at a certain distance. The connecting rod is located between the two ear plates, and the ear plates are welded to the slide.

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