Steel pipe clamping jaw mechanism of cold-drawing machine

Abstract

The steel pipe clamping jaw mechanism comprises an oil cylinder assembly, the oil cylinder assembly comprises an oil cylinder, an oil cylinder piston rod, an oil cylinder base and an oil cylinder connecting piece, the oil cylinder is connected with the oil cylinder base through the oil cylinder connecting piece, and the oil cylinder base is fixedly arranged on a cold-drawing machine trolley; the plug assembly comprises a plug and a plug positioning connecting rod, the plug positioning connecting rod is connected with the oil cylinder piston rod, and the plug is fastened on the plug positioning connecting rod; the flange plate is fixedly connected to the oil cylinder piston rod, a plurality of U-shaped grooves are formed in the flange plate, and forceps holders are connected into the U-shaped grooves; the taper sleeve is fixedly arranged on the cold-drawing machine trolley, and the taper sleeve is provided with an inclined surface and is used for guiding the forceps holder to move inwards. The steel pipe clamping jaw mechanism of the cold-drawing machine is simple in structure, firm and durable, the conical surface locking principle is utilized, the clamping force is increased along with steel pipe drawing, and steel pipe bending and stub bar tearing caused by uneven clamping force are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cold drawing machines, and particularly to a steel pipe clamping jaw mechanism for a cold drawing machine. Background Art

[0002] During the cold drawing process of steel pipes, one end of the steel pipe needs to be clamped, and then it is pulled through a die by a drawing force to achieve the required size and shape. Traditional clamping mechanisms usually use multiple oil cylinders and multiple jaws. However, due to uneven distribution of clamping force or insufficient clamping force, problems such as steel pipe bending and blank end tearing are likely to occur. In addition, the use of multiple oil cylinders also increases the complexity and maintenance cost of the equipment. Summary of the Invention

[0003] To solve the above problems, the present invention provides a steel pipe clamping jaw mechanism for a cold drawing machine, which is simple in structure, firm and durable. Using the principle of conical surface locking, the clamping force increases with the steel pipe drawing, avoiding steel pipe bending and blank end tearing caused by uneven clamping force.

[0004] To achieve the above object, the embodiments of the present invention adopt the following technical solutions: A steel pipe clamping jaw mechanism for a cold drawing machine, comprising: An oil cylinder assembly, the oil cylinder assembly includes an oil cylinder, an oil cylinder piston rod, an oil cylinder base and an oil cylinder connecting piece. The oil cylinder is connected to the oil cylinder base through the oil cylinder connecting piece, and the oil cylinder base is fixedly arranged on the cold drawing machine trolley; A plug assembly, the plug assembly includes a plug and a plug positioning link. The plug positioning link is connected to the oil cylinder piston rod, and the plug is fastened on the plug positioning link; A flange plate, the flange plate is fixedly connected to the oil cylinder piston rod. A plurality of U-shaped grooves are provided on the flange plate, and a clamp is connected in the U-shaped groove; A tapered sleeve, the tapered sleeve is fixedly arranged on the cold drawing machine trolley. The tapered sleeve has an inclined surface for guiding the clamp to move inward.

[0005] In one embodiment, it further includes a release hook plate, and the release hook plate is arranged on the inner surface of the tapered sleeve.

[0006] In one embodiment, the number of the U-shaped grooves is at least three, evenly arranged in the flange plate, and a clamp is connected to each U-shaped groove.

[0007] In one embodiment, the inner inclined surface of the tapered sleeve matches the contact surface of the clamp to form a conical surface locking structure.

[0008] In one embodiment, a clamp slider is provided between the clamp and the tapered sleeve.

[0009] In one embodiment, the clamp is connected to the flange plate through a T-shaped block.

[0010] The beneficial effects of the present invention lie in providing a steel pipe clamping jaw mechanism for a cold drawing machine, which includes an oil cylinder assembly, a plug assembly, a flange plate and a tapered sleeve. The tapered sleeve has an inclined surface in contact with the clamp. The angle of the inner inclined surface of the tapered sleeve matches the angle of the contact surface of the clamp, forming a tapered surface locking structure. This not only ensures that the steel pipe is stably clamped during the drawing process, avoiding bending, but also enables uniform distribution of the clamping force, thereby improving the drawing quality and production efficiency of the steel pipe. The steel pipe clamping jaw mechanism of the cold drawing machine of the present invention has a simple and durable structure, makes full use of the principle of tapered surface locking, so that the clamping force increases with the drawing of the steel pipe. After using one oil cylinder and three jaws, the force transduction is simpler and more concentrated, and the relative movement is more symmetrical, having significant market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0012] Figure 1 It is a schematic structural diagram of the steel pipe clamping jaw mechanism for the cold drawing machine described in the present invention; Figure 2 It is a schematic structural diagram of the flange plate described in the present invention.

[0013] The reference numerals are: 1. Oil cylinder; 11. Oil cylinder base; 12. Oil cylinder connecting piece; 2. Plug; 21. Plug positioning link; 3. Flange plate; 31. U-shaped groove; 4. Clamp; 41. Clamp slider; 5. Tapered sleeve; 6. Disengagement hook plate; 7. T-shaped block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0015] In addition, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0016] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection: it may be a mechanical connection or an electrical connection: it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] As Figure 1 、 Figure 2 shown, the cold-drawing machine steel pipe clamping jaw mechanism of the present invention includes: an oil cylinder assembly, a plug assembly, a flange 3, and a tapered sleeve 5. The oil cylinder assembly includes an oil cylinder 1, an oil cylinder piston rod, an oil cylinder base 11, and an oil cylinder connecting member 12. The oil cylinder 1 is connected to the oil cylinder base 11 through the oil cylinder connecting member 12. The oil cylinder base 11 is fixedly arranged on the trolley of the cold-drawing machine. By the extension and retraction of the oil cylinder piston rod, the clamping jaws 4 are driven to clamp and release the steel pipe blank, providing power for the entire clamping mechanism.

[0019] The plug assembly includes a plug 2 and a plug positioning link 21. The plug positioning link 21 is fixedly connected to the oil cylinder piston rod by screws. The plug 2 is tightly connected to the plug positioning link 21 and is used to contact the steel pipe blank during clamping to prevent it from falling off. The material of the plug 2 is wear-resistant material to improve its service life.

[0020] The flange 3 is fixedly connected to the piston rod of the oil cylinder. There are several U-shaped grooves 31 on the flange 3, and a clamp 4 is connected in the U-shaped groove 31. In this embodiment, the number of clamps 4 is three, which are evenly distributed in the U-shaped grooves 31 of the flange 3 and are connected to the flange 3 by screws. The number of U-shaped grooves 31 is at least three, which are evenly arranged in the flange 3, and each U-shaped groove 31 is connected with a clamp 4. Further, the inner side of the clamp 4 is provided with a clamping surface that contacts the steel pipe blank. The shape and size of the clamping surface can be set to match the outer contour of the steel pipe blank to ensure the clamping effect.

[0021] The tapered sleeve 5 is fixedly arranged on the cold drawing machine trolley through a bolt-nut assembly. The tapered sleeve 5 has an inclined surface that contacts the clamp 4 and is used to guide the clamp 4 to move inward. The angle of the inner inclined surface of the tapered sleeve 5 matches the contact surface angle of the clamp 4 to form a tapered surface locking structure to ensure the tapered surface locking effect.

[0022] The device further includes a release hook plate 6, which is arranged on the inner surface of the tapered sleeve 5 and is used to automatically separate the steel pipe blank from the clamp 4 when the piston rod of the oil cylinder retracts. The surface of the release hook plate 6 is provided with a buffer layer to reduce the impact and wear of the steel pipe blank during separation.

[0023] In practical applications, a clamp slider 41 is arranged between the clamp 4 and the tapered sleeve 5 to reduce the frictional resistance of the clamp 4 during the clamping process and improve the clamping efficiency. The clamp 4 is connected to the flange 3 through a T-shaped block 7, making the installation and disassembly of the clamp 4 more convenient.

[0024] When clamping the steel pipe, the piston rod of the oil cylinder pushes the flange 3 and the clamp 4 outward. The clamp 4 contacts the inclined surface of the tapered sleeve 5 and is squeezed, so as to lock inward and clamp the steel pipe blank on the plug 2. During the drawing process, due to the existence of the tapered surface and the drawing force acting on the steel pipe, the steel pipe blank will be clamped tighter and tighter. When discharging the material, the piston rod of the oil cylinder retracts inward, and the steel pipe blank returns with the clamp 4 and touches the release hook plate 6, so as to automatically separate from the clamp 4.

[0025] The above embodiments are the preferred implementation solutions of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the scope of the present invention patent.

[0026] In order to make it more convenient for those of ordinary skill in the art to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements have also been omitted in this application document. Those of ordinary skill in the art should be aware that these omitted elements can also constitute the content of the present invention.

Claims

1. A steel pipe clamping jaw mechanism for a cold drawing machine, characterized in that Comprising: An oil cylinder assembly, the oil cylinder assembly includes an oil cylinder (1), an oil cylinder piston rod, an oil cylinder base (11) and an oil cylinder connecting piece (12), the oil cylinder (1) is connected to the oil cylinder base (11) through the oil cylinder connecting piece (12), and the oil cylinder base (11) is fixedly arranged on the cold drawing machine trolley; A plug component, the plug component includes a plug (2) and a plug positioning connecting rod (21), the plug positioning connecting rod (21) is connected to the oil cylinder piston rod, and the plug (2) is fastened on the plug positioning connecting rod (21); A flange plate (3), the flange plate (3) is fixedly connected to the oil cylinder piston rod, several U-shaped grooves (31) are provided on the flange plate (3), and a clamp (4) is connected in the U-shaped groove (31); A tapered sleeve (5), the tapered sleeve (5) is fixedly arranged on the cold drawing machine trolley, and the tapered sleeve (5) has an inclined surface for guiding the clamp (4) to move inwards.

2. The cold drawing machine steel pipe clamping jaw mechanism according to claim 1, characterized in that It further includes a disengaging hook plate (6), and the disengaging hook plate (6) is arranged on the inner surface of the tapered sleeve (5).

3. The cold-drawing machine steel pipe clamping jaw mechanism according to claim 1, characterized in that, The number of the U-shaped grooves (31) is at least three, which are evenly arranged in the flange plate (3), and a clamp (4) is connected to each U-shaped groove (31).

4. The cold-drawing machine steel pipe clamping jaw mechanism according to claim 1, wherein, The inner inclined surface of the tapered sleeve (5) matches the contact surface of the clamp (4) to form a conical surface locking structure.

5. The cold drawing machine steel pipe clamping jaw mechanism according to claim 1, characterized in that, A clamp slider (41) is arranged between the clamp (4) and the tapered sleeve (5).

6. The cold drawing machine steel pipe clamping jaw mechanism according to claim 1, characterized in that, The clamp (4) is connected to the flange plate (3) through a T-shaped block (7).

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