Pushing device of cold-drawing machine

Abstract

The utility model belongs to the technical field of cold-drawing machines, and particularly relates to a material pushing device of a cold-drawing machine, which comprises a base, a material pushing track is arranged at the bottom of the base, a material pushing trolley is arranged on the material pushing track, a cross beam is arranged in the base and above the material pushing track, and a material pushing device is arranged on the cross beam. The pushing trolley is provided with a plurality of supporting idler wheels which make contact with the pushing track and the cross beam at the same time, the supporting idler wheels are provided with limiting structures, and the limiting structures abut against the pushing track and the cross beam in the horizontal direction. On the upper side, the trolley is stabilized in the material pushing track and does not jump up and down through abutting of the cross beam and the supporting rolling wheels, and meanwhile, the supporting rolling wheels are further provided with special shapes to be matched with the material pushing track and the cross beam, so that shaking of the material pushing trolley in the horizontal direction is limited, and the material pushing trolley has more stable walking performance in the cold drawing process; not only is the cold-drawing quality of the pipe material improved, but also the risk that the oil cylinder is damaged is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold drawing machines, and in particular relates to a material pushing device for a cold drawing machine. Background Art

[0002] The cold drawing machine is used to draw ferrous and nonferrous metal bars at room temperature and to perform secondary processing on rough pipes after hot rolling and extrusion. The drawing trolley is supported by two I-shaped guide rails and driven by the main oil cylinder to make the trolley run along the I-shaped guide rails. The main oil cylinder and the drawing trolley can be axially fixed to the trolley body through an adjustable split piston.

[0003] Patent CN118106362A discloses an ultra-long clean stainless steel pipe cold drawing device, including two holding mechanisms and a cold drawing mechanism, both holding mechanisms include a moving seat, a first driving mechanism, a clamping mechanism and a second driving mechanism, the clamping mechanism includes a base and two clamping blocks, the middle parts of the two clamping blocks also have a card slot, the two ends of the steel pipe respectively have clamping ends, the clamping ends are penetrated by a rod body, and the clamping ends are arranged between the two clamping blocks, the cold drawing mechanism includes a trolley, a cold drawing die seat and a cold drawing die, the top of the cold drawing die seat has a mounting groove, the cold drawing die is composed of a left die body and a right die body and is fixed in the mounting groove, and also includes a cover plate, the cover plate is fixed on the top of the cold drawing die seat to avoid displacement or disengagement of the cold drawing die, the steel pipe is also provided with a pre-processed groove corresponding to the cold drawing die hole, and a preparation process corresponding to the equipment is also disclosed. The present invention can keep the steel pipe straight from the beginning of cold drawing to the completion of cold drawing, avoid sagging and falling, so as to ensure the processing accuracy of the steel pipe.

[0004] In the above scheme, although the steel pipe can always be kept straight during the cold drawing process, the problem of uneven force at the connection between the steel pipe and the cold drawing die caused by sagging of the extra-long steel pipe during the cold drawing process is solved, due to the influence of factors such as the material of the pipe itself, the resistance encountered by the trolley during the cold drawing process of the pipe is not stable, which will cause the trolley to not only shake left and right but also jump up and down, which will damage the cylinder piston. Utility Model Content

[0005] The purpose of the utility model is to provide a cold drawing machine pushing device which can solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The pushing device of the cold drawing machine includes a base, a pushing track is arranged at the bottom of the base, a pushing trolley is arranged on the pushing track, a cross beam is also arranged in the base above the pushing track, a plurality of supporting rollers which are in contact with the pushing track and the cross beam at the same time are arranged on the pushing trolley, a limiting structure is provided on the supporting roller, and the limiting structure abuts against the pushing track and the cross beam in the horizontal direction.

[0008] In the cold drawing machine pushing device, the supporting roller comprises an upper roller and a lower roller, the upper roller abuts against the lower edge of the cross beam, and the lower roller cooperates with the pushing track.

[0009] In the cold drawing machine pushing device, outwardly extending limit brackets are arranged on both sides of the pushing trolley, the upper roller is rotatably arranged on the limit bracket, and the distance between the two upper rollers is greater than the distance between the two lower rollers.

[0010] In the cold drawing machine pushing device, two V-shaped abutment surfaces are arranged on the wheel surface of the upper roller, and the abutment surfaces abut against the lower edge of the crossbeam.

[0011] In the cold drawing machine pushing device, a U-shaped arc surface is arranged on the wheel surface of the upper roller, and the abutting surface is completely in contact with the lower edge of the crossbeam.

[0012] In the cold drawing machine pushing device, two axial end faces of the upper roller are provided with bidirectional thrust bearings, and two circles of V-shaped symmetrical rotors are provided in the bidirectional thrust bearings.

[0013] In the cold drawing machine pushing device, the lower roller is connected to the support leg at the lower end of the pushing trolley, and a pushing cylinder is arranged in the pushing trolley, and the pushing cylinder is located above the lower roller.

[0014] In the cold drawing machine pushing device, a bar clamp is provided on the pushing trolley, and the bar clamp is arranged at a position between the two pushing cylinders.

[0015] In the cold drawing machine pushing device, a radially protruding limiting plate is arranged on the axial end surface of the lower roller, and the limiting plate abuts against the side wall of the pushing track.

[0016] In the cold drawing machine pushing device, the limiting plate is arranged on the axial end surface of the lower roller away from the side of the upper roller.

[0017] The advantages of the utility model are:

[0018] Two guiding components, a pushing track and a crossbeam, are arranged on the base, so that the lower end of the pushing trolley moves along the pushing track, and the upper side is stabilized in the pushing track by the abutment of the crossbeam and the supporting rollers so as not to jump up and down. At the same time, the supporting rollers are also provided with a unique shape to cooperate with the pushing track and the crossbeam, so as to limit the horizontal shaking of the pushing trolley, so that the pushing trolley has a more stable walking performance during the cold drawing process, which not only improves the cold drawing quality of the pipe but also greatly reduces the risk of damage to the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the upper roller structure of the utility model.

[0021] Figure 3 It is a schematic diagram of the structure of a bidirectional thrust bearing of the utility model.

[0022] Figure 4 This is a schematic diagram of the lower roller structure of the utility model.

[0023] In the figure, there are a base 1, a pushing track 2, a pushing trolley 3, a limiting bracket 31, a pushing cylinder 32, a rod clamp 33, a crossbeam 4, an upper roller 51, a lower roller 52, a bidirectional thrust bearing 53, and a limiting plate 54. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the utility model and the accompanying drawings to further describe the technical solution of the utility model, but the utility model is not limited to these embodiments. Example 1

[0025] like Figure 1-Figure 4 As shown, the pushing device of the cold drawing machine includes a base 1, which is characterized in that a pushing track 2 is arranged at the bottom of the base 1, a pushing trolley 3 is arranged on the pushing track 2, a cross beam 4 is also arranged above the pushing track 2 in the base 1, and a plurality of supporting rollers that are in contact with the pushing track 2 and the cross beam 4 at the same time are arranged on the pushing trolley 3, a limiting structure is provided on the supporting roller, and the limiting structure is against the pushing track 2 and the cross beam 4 in the horizontal direction.

[0026] That is, two guiding components, a pushing track 2 and a crossbeam 4, are provided on the base 1, so that the lower end of the pushing trolley 3 moves along the pushing track, and the upper side is stabilized in the pushing track 2 by the abutment of the crossbeam 4 and the supporting rollers, so that the trolley will not jump up and down. At the same time, the supporting rollers are also provided with a unique shape to cooperate with the pushing track 2 and the crossbeam 4, so as to limit the shaking of the pushing trolley 3 in the horizontal direction, so that the pushing trolley 3 has a more stable walking performance during the cold drawing process, which not only improves the cold drawing quality of the pipe but also greatly reduces the risk of damage to the cylinder.

[0027] In this embodiment, the supporting rollers include an upper roller 51 and a lower roller 52 . The upper roller 51 abuts against the lower edge of the crossbeam 4 , and the lower roller 52 cooperates with the pushing track 2 .

[0028] The upper roller 51 and the lower roller 52 are in contact with the push rail 2 and the cross beam 4 respectively, and the support rollers at multiple angles are used to limit the deviation of the push trolley 3 during operation from the vertical direction and the horizontal direction, so that the tube material can smoothly enter the cold drawing die.

[0029] In this embodiment, outwardly extending limit brackets 31 are provided on both sides of the pusher trolley 3 , and the upper rollers 51 are rotatably disposed on the limit brackets 31 . The distance between the two upper rollers 51 is greater than the distance between the two lower rollers 52 .

[0030] The limiting bracket 31 is installed on both sides of the pusher trolley 3 using angle irons, so that the two upper rollers 51 arranged thereon have a larger spacing than the two lower rollers 52, which enables the pusher trolley 3 to maintain balance more easily when the upper rollers 51 are subjected to the downward reaction force of the cross beam 4, and the upper center of gravity of the pusher trolley 3 is more stable.

[0031] Preferably, two V-shaped abutment surfaces are arranged on the wheel surface of the upper roller 51 , and the abutment surfaces abut against the lower edge of the crossbeam 4 .

[0032] The V-shaped abutting surface abuts against the circular cross beam 4, and the reaction force of the cross beam 4 is clearer, which is respectively an inverted V pressure perpendicular to the abutting surface, which is more conducive to the direction setting of the bearing rotor, so that the rotor contact surface is perpendicular to the force direction. In addition, the smaller contact area between the upper roller 51 and the cross beam 4 means smaller friction, reducing the pressure of the oil cylinder pushing the trolley.

[0033] Preferably, two axial end surfaces of the upper roller 51 are provided with bidirectional thrust bearings 53 , and two circles of V-shaped symmetrical rotors are provided in the bidirectional thrust bearings 53 .

[0034] The upper roller 51 and the cross beam 4 not only have a force relationship in the vertical direction, but also have a restraint in the horizontal direction. Therefore, the rotor is allowed to have a certain angle to withstand the forces in the vertical and horizontal directions.

[0035] Of course, the horizontal direction includes two opposite directions, left and right, so two symmetrical rotors are set to deal with the left and right forces respectively.

[0036] In this embodiment, the lower roller 52 is connected to the supporting leg at the lower end of the pushing trolley 3 , and a pushing cylinder 32 is provided in the pushing trolley 3 , and the pushing cylinder 32 is located above the lower roller 52 .

[0037] If conditions permit, the push cylinder 32 is set at the same vertical position as the main load-bearing lower roller 52 as much as possible to avoid horizontal torque between the action point of the push cylinder 32 and the lower roller 52, which would cause greater friction between the lower roller 52 and the push track 2 and cause stability problems during the movement of the trolley.

[0038] Preferably, a bar clamp 33 is provided on the pushing trolley 3 , and the bar clamp 33 is arranged at a position between the two pushing cylinders 32 .

[0039] The bar clamp 33 must be arranged in the middle of the two pushing cylinders 32 so that the force on the bar clamp 33 in the middle is balanced.

[0040] In this embodiment, a radially protruding limiting plate 54 is provided on the axial end surface of the lower roller 52 , and the limiting plate 54 abuts against the side wall of the pushing track 2 .

[0041] Not only does the upper roller 51 have a structure that limits left and right shaking, the lower roller 52 also has a limit plate 54 that abuts against the side wall of the pushing track 2. Two limit plates 54 with a spacing equal to the width of the single track are set on one lower roller 52, so that the single track can just fit between the two limit plates 54, or a limit plate 54 is symmetrically set on each of the two lower rollers 52, so that the two limit plates 54 are equal to the spacing between the two tracks, ensuring that the lower roller 52 can operate in a straight line along the track without shaking.

[0042] Preferably, the limit plate 54 is arranged on the axial end face of the lower roller 52 away from the upper roller 51. Because the upper roller 51 is arranged at a position further outward than the lower roller 52, in order to balance the force of the upper roller 51, the limit plate 54 is arranged on the inner side of the lower roller 52.

[0043] Example 2

[0044] The arrangement of the limiting structure of the upper roller 51 in the first embodiment is changed. A U-shaped arc surface is arranged on the wheel surface of the upper roller 51 , and the abutting surface is completely in contact with the lower edge of the crossbeam 4 .

[0045] Compared with the V-shaped limiting structure, the U-shaped arc surface has a higher fit with the circular beam 4, and is more suitable for a pusher trolley with a smaller upper and lower pressure between the beam 4 and the upper roller 51. Because of the higher fit, the movement of the upper roller 51 can be well guided under small pressure.

[0046] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A cold drawing machine pusher device, comprising a base (1), characterized in that: A material pushing track (2) is arranged at the bottom of the base (1), a material pushing trolley (3) is arranged on the material pushing track (2), a cross beam (4) is arranged in the base (1) above the material pushing track (2), a plurality of supporting rollers that are in contact with the material pushing track (2) and the cross beam (4) are arranged on the material pushing trolley (3), a limiting structure is provided on the supporting roller, and the limiting structure abuts against the material pushing track (2) and the cross beam (4) in the horizontal direction.

2. The cold drawing machine pusher device according to claim 1, characterized in that: The supporting rollers comprise an upper roller (51) and a lower roller (52); the upper roller (51) abuts against the lower edge of the crossbeam (4); and the lower roller (52) fits on the material pushing track (2).

3. The cold drawing machine pusher device according to claim 2, characterized in that: The two sides of the pusher trolley (3) are provided with outwardly extending limit brackets (31), the upper rollers (51) are rotatably arranged on the limit brackets (31), and the distance between the two upper rollers (51) is greater than the distance between the two lower rollers (52).

4. The cold drawing machine pusher device according to claim 2, characterized in that: Two V-shaped abutment surfaces are provided on the wheel surface of the upper roller (51), and the abutment surfaces abut against the lower edge of the crossbeam (4).

5. The cold drawing machine pusher device according to claim 2, characterized in that: A U-shaped arc surface is provided on the wheel surface of the upper roller (51), and the abutment surface is completely in contact with the lower edge of the crossbeam (4).

6. The cold drawing machine pusher device according to claim 4 or 5, characterized in that: Two axial end surfaces of the upper roller (51) are provided with bidirectional thrust bearings (53), and two circles of V-shaped symmetrical rotors are provided in the bidirectional thrust bearings (53).

7. The cold drawing machine pusher device according to claim 2, characterized in that: The lower roller (52) is connected to the support leg at the lower end of the pushing trolley (3). A pushing cylinder (32) is provided in the pushing trolley (3), and the pushing cylinder (32) is located above the lower roller (52).

8. The cold drawing machine pusher device according to claim 7, characterized in that: The pusher trolley (3) is provided with a bar material clamp (33), and the bar material clamp (33) is arranged at a position between the two pusher cylinders (32).

9. The cold drawing machine pusher device according to claim 2, characterized in that: A radially protruding limiting plate (54) is provided on the axial end surface of the lower roller (52), and the limiting plate (54) abuts against the side wall of the pushing track (2).

10. The cold drawing machine pusher device according to claim 9, characterized in that: The limiting plate (54) is arranged on the axial end surface of the lower roller (52) at a side away from the upper roller (51).

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