Three-wire cold drawing machine

Abstract

The utility model relates to the technical field of pipe processing, and provides a three-wire cold-drawing machine. The cold-drawing machine comprises a cold-drawing unit, the cold-drawing unit comprises forming elements and a cold-drawing frame, a plurality of groups of forming elements are horizontally distributed in the cold-drawing frame, the forming elements are rotating bodies, and the section, penetrating through a rotating shaft, of each forming element is shown as follows: the side edge is an inwards-sunken arc line, and the upper end and the lower end are straight lines; a chamfer is arranged at the intersection of the arc line and the straight line, the forming elements are rotatably connected with the cold-drawing frame, the chamfer surfaces of the forming elements in each group are attached to each other, and the space between the forming elements in each group is a cold-drawing cavity. The worn surface is changed into the whole side surface of the forming element, so that the problem of wear accumulation of the cold-drawing unit is solved, and the service life of the cold-drawing machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe processing, in particular to a three-line cold drawing machine. Background Art

[0002] When using a cold drawing machine to cold-draw steel pipes, the hot-rolled seamless steel pipes are drawn through the cold drawing unit at normal temperature. The diameter of the product decreases and the length increases. It has the advantages of high dimensional accuracy and small surface roughness. Relying on these characteristics, the steel pipe cold drawing machine is widely used.

[0003] Most of the cold drawing units used in traditional cold drawing machines are circular rings. During the cold drawing process, the wear on the cold drawing unit is extremely large. These wears mainly accumulate at the entrance of the cold drawing unit, greatly affecting the service life of the cold drawing machine. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cold drawing machine, which can increase the worn surface of the cold drawing unit, avoid the problem of wear accumulation on the cold drawing unit, and improve the service life of the cold drawing machine.

[0005] The utility model provides a cold drawing machine, including:

[0006] A cold drawing unit, the cold drawing unit is equipped with forming elements. Three groups of forming elements are distributed in parallel in the cold drawing unit. The forming elements are rotating bodies. The cross-section of the forming element passing through the rotating shaft shows that the side is an arc concave inward, and the upper and lower ends are straight lines. Chamfers are provided at the intersections of the arc and the straight lines. The forming elements are rotatably installed in the cold drawing unit. The chamfered surfaces of the forming elements in each group are mutually attached, and the arc surfaces of the forming elements in each group together form a cold drawing cavity.

[0007] Preferably, the rotation actions of all the forming elements are synchronized.

[0008] Preferably, the cold drawing machine further includes a feeding unit, the feeding unit is located in front of the cold drawing unit, and a plurality of feeding ports are provided on the feeding unit.

[0009] Preferably, a cleaning ring is fixedly connected to each feeding port on the feeding unit.

[0010] Preferably, the feeding unit includes positioning conveyor wheels, the positioning conveyor wheels are rotatably connected in the feeding ports, the positioning conveyor wheels are rotating bodies, and positioning grooves are provided on the outermost circle of the positioning conveyor wheels.

[0011] Preferably, the cold drawing machine further includes a cold drawing cart, the cold drawing cart is located behind the cold drawing unit, and the fixed end of the cold drawing cart faces the cold drawing raw material.

[0012] Preferably, a track is provided below the cold drawing vehicle.

[0013] Preferably, the cold drawing machine further includes a support unit, the support unit includes a support frame, the support frame is located behind the cold drawing unit and is distributed in parallel along the movement track of the cold drawing vehicle, and the height of the support frame in the vertical direction is lower than that of the cold drawing vehicle.

[0014] Preferably, the support unit further includes a lifter, and each support frame is separately connected to one lifter.

[0015] Preferably, the support unit further includes a guide frame, and the guide frame and the support frame are spaced apart.

[0016] The technical solution of the present utility model realizes avoiding the wear and accumulation problem of the cold drawing unit and improving the service life of the cold drawing machine by adding a rotatable forming element in the cold drawing unit. During the rotation of the forming element, the worn surface becomes the entire side surface of the forming element. Description of the Drawings

[0017] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the three-line cold drawing machine of the present utility model;

[0019] Figure 2 It is a diagram of the element relationship at the start of the cold drawing operation of the three-line cold drawing machine of the present utility model;

[0020] Figure 3 It is Figure 1 a schematic structural diagram of the support unit in the three-line cold drawing machine in

[0021] Figure 4 It is Figure 1 a diagram of the element relationship between the cold drawing unit and the forming element in the three-line cold drawing machine in

[0022] Figure 5 It is Figure 1 a cross-sectional view of the feeding unit in the three-line cold drawing machine in

[0023] Figure 6 It is Figure 1 a cross-sectional view of the forming element in the three-line cold drawing machine in

[0024] Description of the Reference Numerals:

[0025] 1. Cold drawing unit; 11. Forming element; 12. Cold drawing cavity; 2. Loading unit; 21. Cleaning ring; 22. Positioning transfer wheel; 3. Cold drawing vehicle; 31. Track; 4. Support unit; 41. Support frame; 42. Lifter; 43. Guide frame. Detailed implementation manners

[0026] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, 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 utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 thus cannot be understood as a limitation to the present utility model.

[0028] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" 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 elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Combined with Figures 1 to 6 As shown, a three-wire cold drawing machine provided by the present utility model includes a cold drawing unit 1.

[0030] Combined with Figures 1 to 6As shown, the cold drawing unit 1 includes a forming element 11 and a cold drawing frame. Multiple groups of forming elements 11 are horizontally distributed in the cold drawing frame. The forming element 11 is a rotating body. The cross-section of the forming element 11 passing through the rotating shaft shows that the side is an arc concave inward, and the upper and lower ends are straight lines. Chamfers are provided at the intersections of the arc and the straight lines. The forming element 11 is rotatably connected to the cold drawing frame. The chamfered surfaces of the forming elements 11 within each group are mutually attached. The space between the forming elements 11 within each group is the cold drawing cavity 12. A rotatable forming element is added to the cold drawing unit. During the operation of the cold drawing machine, the forming element will rotate. During the rotation of the forming element, the worn surface becomes the entire side surface of the forming element, thus avoiding the problem of wear accumulation in the cold drawing unit and improving the service life of the cold drawing machine.

[0031] In some embodiments, in combination with Figure 1 、 Figure 2 and Figure 4 shown, the rotational movements of all the forming elements 11 are synchronized. Synchronizing the rotational movements of the forming elements 11 can ensure that the effects on the pipe during the cold drawing process are similar. The controllable rotational movement of the forming element 11 can enrich the functions of the cold drawing machine. When the forming element 11 rotates along the direction of pipe movement, the friction between the pipe and the forming element 11 can be reduced, improving its service life. When the forming element 11 rotates against the direction of pipe movement, the friction between the pipe and the forming element 11 can be increased, which can improve the surface roughness of the product and the quality of the product.

[0032] In some embodiments, in combination with Figure 1 、 Figure 2 and Figure 5 shown, the cold drawing machine further includes a feeding unit 2. The feeding unit 2 is located in front of the cold drawing unit 1. The feeding unit 2 is provided with multiple feeding ports. By feeding through the feeding unit 2, the reliability and accuracy of feeding can be improved, the time for adjusting the position of the pipe during feeding can be reduced, and indirectly, the working efficiency of the cold drawing machine can be increased.

[0033] In some embodiments, in combination with Figure 1 、 Figure 2 and Figure 5 shown, each feeding port on the feeding unit 2 is fixedly connected with a cleaning ring 21. By adding the cleaning ring 21, the sundries attached to the pipe can be cleaned, avoiding the adverse effects of sundries on the cold drawing process.

[0034] In some embodiments, in combination with Figure 1 、 Figure 2 and Figure 5As shown, the feeding unit 2 includes a positioning conveyor wheel 22 which is rotatably connected within the feeding port. The positioning conveyor wheel 22 is a rotating body, and there are positioning grooves provided on the outermost ring of the positioning conveyor wheel 22. Through the positioning conveyor wheel 22, precise positioning of the pipe can be achieved, the feeding speed can be regulated, and "thrust" can be increased during the feeding process to improve the stress on the pipe during the cold drawing process.

[0035] In some embodiments, in combination with Figure 1 and Figure 2 As shown, the cold drawing machine further includes a cold drawing carriage 3 which is located behind the cold drawing unit 1. The fixed end of the cold drawing carriage 3 faces the cold drawing raw material. The cold drawing carriage 3 is one of the crucial components in the cold drawing machine and is the main power element during the cold drawing process.

[0036] In some embodiments, in combination with Figure 1 and Figure 2 As shown, there is a track 31 provided below the cold drawing carriage 3. The cold drawing carriage 3 travels on the track 31. The track 31 is distributed on the outermost side of the cold drawing machine. By adding the track 31, the movement state of the cold drawing carriage 3 can be improved, and by designing the track 31 on the outermost side, interference between the cold drawing carriage 3 and other components during operation can be avoided.

[0037] In some embodiments, in combination with Figures 1 to 3 As shown, the cold drawing machine further includes a support unit 4. The support unit 4 includes a support frame 41 which is located behind the cold drawing unit 1 and is distributed in parallel along the movement trajectory of the cold drawing carriage 3. The height of the support frame 41 in the vertical direction is lower than that of the cold drawing carriage 3. The support unit 4 can provide support for the product after cold drawing to prevent the product from deforming and affecting its quality.

[0038] In some embodiments, in combination with Figures 1 to 3 As shown, the support unit 4 further includes a lifter 42. Each support frame 41 is individually connected to one lifter 42. The lifter 42 is a hydraulic actuator. Through the lifter 42, the height of the support frame 41 in the vertical direction can be regulated. When support for the product is required, the support frame 41 is raised to provide the support function. At the same time, the same support unit 4 can be adapted to products of different sizes. When the cold drawing carriage 3 passes by or discharges materials, the height of the support frame 41 is lowered to avoid interference or for discharging materials.

[0039] In some embodiments, in combination with Figures 1 to 3 As shown, the support unit 4 further includes a guide frame 43. The guide frame 43 and the support frame 41 are spaced apart. When discharging materials, the lifter 42 lowers the height of the support frame 41 so that the product contacts the guide frame 43, and finally centralized discharging is carried out on one side.

[0040] Working process: The pipe to be processed first passes through the feeding unit 2. The cleaning ring 21 in the feeding unit 2 will first clean the surface of the pipe, and then accurately enter the cold drawing cavity 12 of the cold drawing unit 1 under the action of the positioning transmission wheel 22. The cold drawing cart 3 is close to the cold drawing unit 1, and the fixed end of the cold drawing cart 3 is connected to the pipe. Then the cold drawing cart 3 moves away from the cold drawing unit 1 and provides power for the cold drawing process. The forming element 11 on the cold drawing unit 1 will contact the pipe and participate in the cold drawing process. During the cold drawing process, the forming element 11 will rotate to avoid the problem of wear and accumulation. During the process of the cold drawing cart 3 moving away from the cold drawing unit 1, the support frame 41 will be lifted in turn under the action of the lifter 42 to provide support for the product. When the cold drawing is completed, the fixed end of the cold drawing cart 3 is released so that the product is completely supported by the support unit 4. At this time, the support frame 41 will descend under the action of the lifter 42, and the product begins to contact the guiding frame 43. However, after the support frame 41 is completely lowered, the product will be stacked on one side of the cold drawing machine under the action of the guiding frame 43.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A three-wire cold drawing machine, characterized in that: include: A cold drawing unit (1), the cold drawing unit (1) comprising a forming element (11) and a cold drawing frame, wherein a plurality of groups of forming elements (11) are horizontally distributed in the cold drawing frame, the forming element (11) is a rotating body, and the forming element (11) has the following characteristics in a cross section passing through the rotating axis: the side is an arc line concave inwards, the upper and lower ends are straight lines, and a chamfer is provided at the intersection of the arc line and the straight line. The forming element (11) is rotatably connected to the cold drawing frame, the chamfered surfaces of the forming elements (11) in each group are fitted together, and the space between the forming elements (11) in each group is a cold drawing cavity (12).

2. The cold drawing machine according to claim 1, characterized in that: The rotational movements of all the forming elements (11) are performed synchronously.

3. The cold drawing machine according to claim 1, characterized in that: It also comprises a loading unit (2), wherein the loading unit (2) is located in front of the cold drawing unit (1), and a plurality of loading ports are provided on the loading unit (2).

4. The cold drawing machine according to claim 3, characterized in that: Each loading port on the loading unit (2) is fixedly connected to a cleaning ring (21).

5. The cold drawing machine according to claim 3, characterized in that: The loading unit (2) comprises a positioning transmission wheel (22), the positioning transmission wheel (22) is rotatably connected in the loading port, the positioning transmission wheel (22) is a rotating body, and the outermost circle of the positioning transmission wheel (22) is provided with a positioning groove.

6. The cold drawing machine according to claim 1, characterized in that: It also includes a cold-drawn car (3), which is located behind the cold-drawn unit (1), and the fixed end of the cold-drawn car (3) faces the cold-drawn raw material.

7. The cold drawing machine according to claim 6, characterized in that: A track (31) is provided below the cold-drawn vehicle (3).

8. The cold drawing machine according to claim 6, characterized in that: It also comprises a support unit (4), the support unit (4) comprising a support frame (41), the support frame (41) being located behind the cold drawing unit (1) and distributed in parallel along the movement track of the cold drawing vehicle (3), the height of the support frame (41) in the vertical direction being lower than that of the cold drawing vehicle (3).

9. The cold drawing machine according to claim 8, characterized in that: The support unit (4) further comprises a lifter (42), and each support frame (41) is individually connected to one lifter (42).

10. The cold drawing machine according to claim 8, characterized in that: The support unit (4) further comprises a guide frame (43), wherein the guide frame (43) and the support frame (41) are spaced apart.

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