Pipe head gripping and releasing mechanism

Abstract

The utility model provides a kind of pipe head holds pipe mechanism, including push mechanism and embrace pincers car body, and through cavity is opened in axial direction in embrace pincers car body;Embrace pincers mechanism includes embrace pincers push mechanism and the cavity internal component of being arranged in through cavity, embrace pincers push mechanism drives embrace pincers jaw body respectively along its corresponding through cavity bevel sliding and mutually closing and hold pipe or deviate and loosen pipe.The utility model structure design is reasonable, when the pipe to be processed is located on the material receiving groove body by pushing mechanism and is pushed to feed, can effectively hold pipe, and it is axially centered, continue feeding after keeping centering and effectively holding, avoid that pipe is pushed bending in pushing feeding process.

Description

Technical Field

[0001] This utility model relates to the field of metal processing machinery technology, and in particular to a tube head holding mechanism. Background Technology

[0002] In metal tubing processing, cold drawing is a common process that applies tensile stress to the metal using a die, causing it to undergo plastic deformation. Compared to hot working, cold drawing involves forcibly pulling a metal billet (such as tubing, bar, or wire) through a die of a specific shape and size at room temperature (usually below the metal's recrystallization temperature) using external force. This reduces the cross-sectional area and increases the length, while simultaneously achieving the desired shape, size, and properties.

[0003] In the cold drawing process, based on the drawing direction, it can be divided into straight-line cold drawing and rotary cold drawing. Straight-line cold drawing involves drawing the tube blank in a straight line along the axial direction, suitable for drawing long tubes. In straight-line cold drawing, the head-making mechanism is usually located between the receiving device and the die base. A hydraulic hammer is typically used to head the end of the tube, making its diameter slightly smaller than the die hole. The headed tube is then passed through the die hole and clamped at the end by the cold drawing carriage, which then performs the drawing. During this process, the tube is pushed and fed by a pushing mechanism into the receiving groove of the receiving device, and then clamped by the cold drawing carriage. In actual production, when the pushing mechanism pushes the feeding head, because the tube is long and slender, if there is an axial alignment error during the force application, the tube may bend when the pushing of the feeding head is obstructed.

[0004] Therefore, how to improve the existing cold drawing machine to give it good clamping and centering performance when clamping pipe heads, and how to effectively prevent pipe bending during the clamping process, have become urgent problems to be solved. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a pipe head clamping mechanism, which can effectively clamp the pipe head and feed it. During the clamping process, it can effectively correct the position of the pipe and keep its axial alignment, effectively avoiding the phenomenon of pipe bending.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a pipe head clamping mechanism is set on a cold drawing machine and located between the receiving trough and the die base. It includes a pushing mechanism and a clamping carriage. The clamping carriage is set on the pushing mechanism and is fed by the pushing mechanism along the axial direction of the cold drawing machine. The clamping carriage is provided with a clamping mechanism, and a through cavity is opened in the clamping carriage along the axial direction. The clamping mechanism includes a clamping pushing mechanism and a cavity component set in the through cavity. The cavity component includes a pair of clamping clamps symmetrically arranged with the axis of the cold drawing machine as the center line. The opposite surfaces of the pair of clamping clamps have clamping surfaces. When the pair of clamping clamps are closed, the clamping surfaces are adapted to clamp the outer wall of the pipe. The inner walls of the through cavity along both sides of the axial direction of the cold drawing machine are inclined surfaces. The outer surface of the clamping clamp is an inclined surface that cooperates with the inclined surface of the through cavity. The clamping pushing mechanism drives the clamping clamps to slide along their corresponding inclined surfaces of the through cavity to close towards each other to clamp the pipe or to separate and release the pipe.

[0007] In the above scheme, the two side walls of the through-cavity are designed as inclined planes, and corresponding clamping bodies are designed to cooperate with the inclined planes. When the clamping bodies move synchronously, they slide along the inclined planes, moving closer or further away from the axis of the cold drawing machine. Because the two clamping bodies are symmetrically arranged, they move closer together to clamp the pipe, and move further away to release it. After effectively clamping the pipe, a pushing mechanism can be used to move the entire clamping carriage axially, facilitating the feeding and head-forming of the pipe. This process effectively achieves automatic pipe centering during clamping, and feeding occurs after centering, effectively avoiding the bending phenomenon that may occur when directly feeding the pipe.

[0008] Furthermore, in the process of pushing the clamping trolley body, the pipe head clamping mechanism also includes a base. A pushing slide rail is fixed axially on the upper surface of the base. The pushing mechanism includes a pushing cylinder. The output end of the pushing cylinder has a pushing piston rod. The lower end of the pushing cylinder body slides in cooperation with the pushing slide rail, while the upper end is fixed with the clamping trolley body. The outer end of the pushing piston rod of the pushing cylinder is positioned and connected to one end of the base. When the pushing cylinder is working, it drives the pushing piston rod to extend and retract relative to the pushing cylinder body along the axial direction of the cold drawing machine. The clamping trolley body extends and retracts along the axial direction of the cold drawing machine along with the cylinder body.

[0009] Preferably, the pushing mechanism includes two pushing cylinders that share the same cylinder body. The pushing piston rods of the two cylinders are respectively arranged parallel to the axis of the cold drawing machine and symmetrically located on both sides of the axis. That is, both sides synchronously provide stable power to push the clamping trolley body.

[0010] Furthermore, the clamping mechanism includes a clamping cylinder, which is fixed to the top of the clamping vehicle body by a cylinder bracket. The output end of the clamping cylinder is equipped with a clamping connecting rod. The top of the clamping vehicle body has sliding grooves parallel to the inclined surfaces on both sides of the through cavity. A clamping pin is slidably mounted in each groove. The lower end of the clamping pin is connected to the clamping body on that side, and the upper end is connected to the clamping connecting rod on that side. When the clamping cylinder actuates, the clamping pin slides along the groove via the clamping connecting rod, and the clamping body slides along the inclined surface under the action of the clamping pin. Power can be synchronously transmitted to the clamping pins on both sides via the clamping connecting rod, facilitating the synchronous movement of the clamping bodies on both sides.

[0011] Furthermore, the clamp body includes a clamp body, a clamp slider, and a clamp cap. The upper surface of the clamp slider has a pin hole, and the lower end of the clamp pin is fixed to the clamp slider through the pin hole. The outer side of the clamp slider is a slope, which cooperates with the slope of the through cavity. The inner side of the clamp slider is in frictional cooperation with the clamp body. The clamp slider is bolted to the clamp body through the clamp cap. The clamp body has a clamping surface on its side.

[0012] Preferably, in order to better improve the clamping effect, the clamping surface has a number of teeth protruding at equal intervals.

[0013] The beneficial effects of this utility model are that the pipe head clamping mechanism provided by this utility model has a reasonable structural design. When the pipe to be processed is located on the receiving trough and is pushed and fed by the pushing mechanism, it can effectively clamp the pipe and center it axially. After maintaining the center and effectively clamping, it continues to feed the pipe, avoiding the pipe being bent during the pushing and feeding process. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a perspective view of the preferred embodiment of the present invention.

[0016] Figure 2 This is a perspective view of the preferred embodiment of the present invention from another direction.

[0017] Figure 3 This is a perspective view of the clamp insert in the preferred embodiment of this utility model.

[0018] Figure 4 This is a perspective view of the clamping vehicle body in the preferred embodiment of this utility model.

[0019] In the figure: 1. Clamping lever; 2. Clamping pin; 3. Clamping cylinder; 4. Clamping body; 5. Clamping carriage; 6. Clamping slider; 7. Through cavity inclined surface; 8. Pushing cylinder; 9. Pushing piston rod; 10. Pushing slide rail; 11. Base; 12. Clamping cover; 13. Pin hole; 14. Sliding slider inclined surface; 15. Tooth profile; 16. Slide groove. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0021] like Figures 1 to 4 The tube head clamping mechanism shown is the preferred embodiment of this utility model.

[0022] The tube head clamping mechanism is installed on the cold drawing machine and is located between the receiving tank and the mold base.

[0023] The tube head wrapping tube head mechanism includes a base 11, a pushing mechanism, and a clamping carriage 5. The base 11 is located between the receiving trough and the mold base, the pushing mechanism is located on the base 11, and the clamping carriage 5 is located on the pushing mechanism and is fed by the pushing mechanism along the axial direction of the cold drawing machine.

[0024] Specifically, such as Figure 1 and Figure 2 As shown, a pushing slide rail 10 is fixed to the upper surface of the base 11 along the axial direction of the cold drawing machine. The pushing mechanism includes two pushing cylinders 8, each with a pushing piston rod 9 at its output end. The pushing piston rods 9 of the two pushing cylinders 8 are respectively arranged parallel to the axis of the cold drawing machine and symmetrically located on both sides of the axis. The two pushing cylinders 8 share the same cylinder body. The lower end of the cylinder body of the pushing cylinder 8 slides in cooperation with the pushing slide rail 10, while the upper end is fixed with a clamping carriage 5. The outer end of the pushing piston rod 9 of the pushing cylinder 8 is positioned and connected to one end of the base 11. When the pushing cylinder 8 is working, it drives the pushing piston rod 9 to extend and retract relative to the cylinder body of the pushing cylinder 8 along the axial direction of the cold drawing machine. The clamping carriage 5 extends and retracts along the axial direction of the cold drawing machine along with the cylinder body. The pushing mechanism provides stable power to push the clamping carriage 5 from the bottom and provides effective and stable limiting guidance through the pushing slide rail 10.

[0025] In the clamping and aligning of pipe fittings, the pipeline is conveyed to the receiving trough of the receiving mechanism and pushed towards the clamping carriage 5 by the pushing mechanism. The clamping carriage 5 has an axially oriented through cavity, within which are internal components. These internal components include clamping jaws arranged symmetrically in pairs around the axis of the cold drawing machine. The upper surface of the clamping carriage 5 is also equipped with a clamping pushing mechanism to push the internal components. During clamping, the clamping pushing mechanism causes the clamping jaws to slide along the corresponding inclined surface 7 of the through cavity, either closing towards each other to clamp the pipe or moving away to release it.

[0026] Specifically, such as Figure 4 As shown, the inner walls of the through cavity along both sides of the cold drawing machine axis are inclined surfaces.

[0027] like Figure 3 As shown, the clamp body includes a clamp body 4, a clamp slider 6, and a clamp cap 12. The upper end face of the clamp slider 6 has a pin hole 13. The lower end of the clamp pin 2 is fixed to the clamp slider 6 through the pin hole 13. The outer side of the clamp slider 6 is a slope, which cooperates with the slope 7 of the through cavity. The inner side of the clamp slider 6 is in frictional cooperation with the clamp body 4. The clamp slider 6 is bolted to the clamp body 4 through the clamp cap 12. The side of the clamp body 4 has a clamping surface. The surface of the clamping surface has several teeth 15 protruding at equal intervals. The teeth 15 are used to improve the friction of the clamping surface and provide a guarantee for effectively clamping the outer wall of the pipe fitting.

[0028] The clamping mechanism includes a clamping cylinder 3, which is fixed to the top of the clamping vehicle body 5 by a cylinder bracket. A clamping connecting rod 1 is located at the output end of the clamping cylinder 3. The top of the clamping vehicle body 5 has sliding grooves 16 parallel to the inclined surfaces on both sides of the through cavity. A clamping pin 2 slides within each groove 16. The lower end of the clamping pin 2 connects to the clamping body on that side, and the upper end connects to the clamping connecting rod 1 on that side. When the clamping cylinder 3 actuates, the clamping pin 2 slides along the groove 16 via the clamping connecting rod 1, causing the clamping body to slide along the inclined surface. Power can be synchronously transmitted to the clamping pins 2 on both sides via the clamping connecting rod 1, facilitating the synchronous actuation of the clamping bodies on both sides.

[0029] In the actual design, the clamping surface is a semi-circular arc-shaped inner wall that mates with the outer wall of the pipe. During the operation of the clamp body 4, since the inner wall of the through cavity is inclined, and the corresponding inner walls of the two clamp bodies 4 are inclined surfaces with the same angle and symmetrical arrangement, when the clamp pushing mechanism drives the clamp body to move synchronously, the clamp body slides along the inclined surface, moving closer or further away from the axis of the cold drawing machine. The clamp slider 6 moves axially in the axial direction and radially in the pipe direction, thus forming a relative centripetal or divergent movement of the clamping surfaces of the two clamp bodies 4. When they move closer synchronously, they form an action of closing and clamping the pipe, and when they diverge synchronously, they form an action of releasing the pipe. The centripetal movement during clamping not only effectively clamps the pipe but also provides an adjustment and alignment operation for the pipe, and effectively clamps and supports the pipe after alignment. After the pipe is effectively clamped, the pushing mechanism can be used to drive the entire clamping carriage 5 to move axially, facilitating the gripping of the pipe for feeding and head forming. For the pipe, the automatic centering action is completed during the clamping process, and then the pipe is fed after maintaining the centering state, which effectively avoids the pushing and bending phenomenon that may occur when the pipe is directly fed, and helps to improve the cold drawing quality.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A tube end clamping mechanism, installed on a cold drawing machine and located between a receiving trough and a die base, characterized in that: It includes a pushing mechanism and a clamping car body. The clamping car body is set on the pushing mechanism and is fed by the pushing mechanism along the axial direction of the cold drawing machine. The clamping car body is equipped with a clamping mechanism, and a through cavity is opened in the clamping car body along the axial direction. The clamping mechanism includes a clamping pushing mechanism and an internal component disposed within the through cavity. The internal component includes a pair of clamping bodies symmetrically arranged with the axis of the cold drawing machine as the center line. The opposing surfaces of the pair of clamping bodies have clamping surfaces. When the pair of clamping bodies are closed, the clamping surfaces are adapted to clamp the outer wall of the pipe. The inner walls of the through cavity on both sides along the axis of the cold drawing machine are inclined surfaces. The outer surface of the clamping bodies is an inclined surface that matches the inclined surface of the through cavity. The clamping pushing mechanism drives the clamping bodies to slide along their corresponding inclined surfaces of the through cavity to either close towards each other to clamp the pipe or move away from each other to release the pipe.

2. The pipe head clamping mechanism as described in claim 1, characterized in that: The system includes a base, with a pusher slide rail fixed axially on the upper surface of the base. The pusher mechanism includes a pusher cylinder with a pusher piston rod at the output end. The lower end of the cylinder body slides with the pusher slide rail, while the upper end is fixed with a clamping trolley. The outer end of the pusher piston rod is positioned and connected to one end of the base. When the pusher cylinder is working, it drives the pusher piston rod to extend and retract relative to the cylinder body along the axial direction of the cold drawing machine. The clamping trolley moves along the axial direction of the cold drawing machine along with the cylinder body.

3. The pipe head clamping mechanism as described in claim 2, characterized in that: The pushing mechanism includes two pushing cylinders, which share the same cylinder body. The pushing piston rods of the two pushing cylinders are respectively arranged parallel to the axis of the cold drawing machine and are symmetrically located on both sides of the axis of the cold drawing machine.

4. The pipe head clamping mechanism as described in claim 1, characterized in that: The clamping mechanism includes a clamping cylinder, which is fixed to the top of the clamping vehicle body by a cylinder bracket. The output end of the clamping cylinder is provided with a clamping connecting rod. The top of the clamping vehicle body has sliding grooves on both sides of the through cavity, which are parallel to the slopes on the same side. A clamping pin is slidably installed in each side of the sliding groove. The lower end of the clamping pin is connected to the clamping body on that side, and the upper end is connected to the clamping connecting rod on that side. When the clamping cylinder is activated, the clamping pin is driven to slide along the sliding groove through the clamping connecting rod. The clamping body slides along the slope under the action of the clamping pin.

5. The pipe head clamping mechanism as described in claim 4, characterized in that: The clamp body includes a clamp body, a clamp slider, and a clamp cap. The upper surface of the clamp slider has a pin hole, and the lower end of the clamp pin is fixed to the clamp slider through the pin hole. The outer side of the clamp slider is a slope, which mates with the slope of the through cavity. The inner side of the clamp slider is in frictional contact with the clamp body. The clamp slider is bolted to the clamp body through the clamp cap. The clamp body has a clamping surface on its side.

6. The pipe head clamping mechanism as described in claim 5, characterized in that: The clamping surface has several teeth protruding at equal intervals.

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