A long-short compensation device for a cold-drawing machine metal tube

Abstract

The utility model relates to a cold-drawing machine metal pipe length short compensating device, the bracket left end of cold-drawing machine pipe penetrating unit is hinged through hinge shaft with hinged support, is slid on the bracket left end face and is equipped with slide seat, the bracket bottom surface is installed with the advance and retreat oil cylinder that drives slide seat to remove and pushes the core stem to remove to the cold-drawing machine core mould, the core stem left end is fixed with the sliding rod, is equipped with the spring cover same as the core stem number on the slide seat, is equipped with the compression spring in the spring cover, and the compression spring right end is connected with the sliding rod left end, and the compression spring left end is connected with the screw rod that the core stem length direction position is fine -tuned, is screwed on the screw rod and is connected with the nut that the screw rod is locked after metal pipe length short compensating in place. The utility model adjusts the phenomenon that the end of a group of metal pipes is not flush due to length error through the mode of rotating screw rod, makes the metal pipe end adjustment to flush state, to ensure that the clamp of clamp trolley can hold a group of metal pipe ends simultaneously and carry out cold plate processing.

Description

Technical Field

[0001] This utility model relates to the field of cold drawing machine technology, and in particular to a metal tube length compensation device for cold drawing machines. Background Technology

[0002] The working process of the cold drawing machine is as follows: After the metal tube is sleeved on the mandrel, one end of the metal tube is passed through the center hole of the cold drawing die. The end of the metal tube is clamped by the clamp trolley installed on the body of the cold drawing machine, and then cold drawing is performed under the reverse traction of the clamp trolley.

[0003] After the mandrel is inserted into the metal tube, the ends of a group of metal tubes passing through the center hole of the cold drawing die must be aligned so that the clamps on the clamping trolley can simultaneously hold the ends of a group of metal tubes for cold drawing.

[0004] However, it is inevitable that there will be a situation where the length of a certain group of metal tubes is inconsistent. This requires adjusting the position of the core rod to compensate for the length of the metal tubes and ensure that the ends of the metal tubes are flush. Summary of the Invention

[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 metal tube length compensation device for cold drawing machine.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a metal tube length compensation device for a cold drawing machine, which is set at the rear end of the tube insertion unit of the cold drawing machine. The tube insertion unit has a bracket, a hinge support, and a core rod set on the bracket. The left end of the bracket is hinged to the hinge support through a hinge shaft. Several sets of support plates supporting the core rod are arranged at intervals along the length direction of the bracket. A slide block is slidably provided on the left end face of the bracket. An advance and retraction cylinder is installed on the bottom surface of the bracket to drive the slide block to move and push the core rod to move towards the core mold of the cold drawing machine. A sliding rod is fixedly connected to the left end of the core rod. The slide block is provided with the same number of spring sleeves as the core rod. A compression spring is provided inside the spring sleeve. The right end of the compression spring is connected to the left end of the sliding rod. The left end of the compression spring is connected to a screw rod that finely adjusts the position of the core rod in the length direction. A nut is threadedly connected to the screw rod to lock the screw rod after the metal tube length compensation is in place.

[0007] Furthermore, guide rails are fixed on the front and rear sides of the bracket, and the inner side of the guide rail has a right-angle notch opened along the length of the guide rail. The right-angle notch and the end faces of the front and rear sides of the bracket form a sliding groove. The bottom of the front and rear sides of the slide seat has a protrusion that slides in cooperation with the sliding groove.

[0008] Specifically, the slide includes a base plate, with end plates fixed at the left and right ends of the base plate. Three rectangular cavities are provided between the end plates at intervals. U-shaped grooves are provided on the end plates corresponding to the left and right ends of the rectangular cavities. The compression spring is located inside the rectangular cavity.

[0009] Furthermore, the left end of the sliding rod is connected to a limiting nut, and the right end of the compression spring is connected to the limiting nut. A nut cap that is fixed to the right end face of the spring sleeve is fitted on the sliding rod to the right of the limiting nut. The right end of the spring sleeve is supported on the outer periphery of the limiting nut, and the left end of the spring sleeve is supported on the outer periphery of the right end of the screw. The nut includes an inner nut and an outer nut. After the inner nut is connected to the screw, it is pressed against the right side face of the left end plate of the slide block. After the outer nut is connected to the screw, it is pressed against the left side face of the left end plate of the slide block.

[0010] Furthermore, a right support is fixed to the bottom surface of the bracket, a left support is fixed to the bottom surface of the slide block, the fixed end of the forward / reverse cylinder is hinged to the right support, and the piston rod end of the forward / reverse cylinder is hinged to the left support.

[0011] Furthermore, a limiting support for controlling the rightward movement of the slide is installed on the bracket at the right end of the slide.

[0012] The beneficial effects of this utility model are: by rotating the screw, this utility model adjusts the unevenness of the ends of a group of metal tubes caused by length errors, so that the ends of the metal tubes are adjusted to be flat, thereby ensuring that the clamps on the clamping trolley can simultaneously clamp the ends of a group of metal tubes for cold plate processing. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a front view structural diagram of this utility model.

[0015] Figure 2 This is a bottom view of the structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the installation structure of the compression spring described in this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the slide block described in this utility model.

[0018] In the diagram: 1. Bracket, 2. Hinge support, 3. Core rod, 4. Support plate, 5. Slide, 5-1. Protrusion, 5-2. Base plate, 5-3. End plate, 5-4. Rectangular cavity, 6. Infeed / retract cylinder, 7. Sliding rod, 8. Spring sleeve, 9. Compression spring, 10. Screw, 11. Guide rail, 12. Slide groove, 13. Limit nut, 14. Nut cover, 15. Inner nut, 16. Outer nut, 17. Right support, 18. Left support, 19. Limit support. Detailed Implementation

[0019] 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, and therefore only show the components relevant to the present invention.

[0020] like Figures 1-4 The device shown is a metal tube length compensation device for a cold drawing machine. It is installed at the rear end of the tube insertion unit of the cold drawing machine. The tube insertion unit has a bracket 1, a hinge support 2 and a core rod 3 on the bracket 1. The left end of the bracket 1 is hinged to the hinge support 2 through a hinge shaft. Several sets of support plates 4 supporting the core rod 3 are arranged at intervals along the length direction of the bracket 1. Each set of support plates 4 supports three core rods 3 arranged at intervals.

[0021] The bracket 1 has a sliding seat 5 located at the left end of the core rod 3 on its left end face. The sliding seat 5 includes a base plate 5-2, and end plates 5-3 are fixed at the left and right ends of the base plate 5-2 respectively. Three rectangular cavities 5-4 are provided between the end plates 5-3 at intervals. U-shaped grooves are opened on the end plates 5-3 corresponding to the left and right ends of the rectangular cavities 5-4. The bottom of the front and rear sides of the base plate 5-2 has protrusions 5-1.

[0022] The bottom surface of the bracket 1 is equipped with a forward and backward hydraulic cylinder 6 that drives the slide block 5 to move and pushes the core rod 3 toward the cold drawing machine core mold. The bottom surface of the bracket 1 of the slide block 5 is fixed with a right support 17. Three long grooves extending along the length of the bracket 1 are opened on the bottom plate of the bracket 1. The bottom surface of the slide block 5 is fixed with a left support 18 that passes through the middle long groove. The fixed end of the forward and backward hydraulic cylinder 6 is hinged to the right support 17, and the piston rod end of the forward and backward hydraulic cylinder 6 is hinged to the left support 18.

[0023] A guide rail 11 is fixed on the front and rear sides of the bracket 1. The inner side of the guide rail 11 has a right-angle notch opened along the length direction of the guide rail 11. The right-angle notch and the end face of the front and rear sides of the bracket 1 form a sliding groove 12. The protrusion 5-1 slides in cooperation with the sliding groove 12.

[0024] The left end of the core rod 3 is fixedly connected to a sliding rod 7. Each of the three rectangular cavities 5-4 of the slide block 5 is provided with a spring sleeve 8. The spring sleeve 8 is provided with a compression spring 9. The left end of the sliding rod 7 is connected to a limit nut 13. The right side of the limit nut 13 is fitted with a nut cap 14 that is fixedly connected to the right end face of the spring sleeve 8. The right end of the compression spring 9 is connected to the limit nut 13.

[0025] The left end of the compression spring 9 is connected to a screw 10 that adjusts the length of the core rod 3. An inner nut 15 and an outer nut 16 are threaded onto the screw 10. The inner nut 15, after being connected to the screw 10, presses against the right side of the left end plate 5-3 of the slide block 5. The outer nut 16, after being connected to the screw 10, presses against the left side of the left end plate 5-3 of the slide block 5. The right end of the spring sleeve 8 is supported on the outer periphery of the limiting nut 13, and the left end of the spring sleeve 8 is supported on the outer periphery of the right end of the screw 10.

[0026] A limiting support 19 for controlling the rightward movement of the slide 5 is installed on the bracket 1 at the right end of the slide 5.

[0027] During tube insertion, the bracket 1, driven by the lifting cylinder installed at the bottom right end of the bracket 1, rotates upward around the hinge support 2 and is obliquely aligned with the metal tube on the storage unit of the cold drawing machine. After the metal tube is inserted into the core rod 3, the bracket 1 returns to its original position downward. The forward and backward cylinder 6 is activated to push the slide 5 to the right, pushing the right end of the metal tube sleeved on the core rod 3 into the core mold of the cold drawing machine. If, at this time, a set of metal tube ends are not flush due to the error in the length of the metal tube, the ends of the metal tubes can be adjusted to a flush state by rotating the screw 10, thereby ensuring that the clamps on the clamp trolley can simultaneously clamp the ends of a set of metal tubes for cold plate processing.

[0028] 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 metal tube length compensation device for a cold drawing machine, disposed at the rear end of the tube-passing unit of the cold drawing machine, wherein the tube-passing unit has a bracket (1), a hinge support (2), and a core rod (3) disposed on the bracket (1), the left end of the bracket (1) is hinged to the hinge support (2) by a hinge shaft, and a plurality of support plates (4) supporting the core rod (3) are provided at intervals along the length direction of the bracket (1), characterized in that: The bracket (1) is slidably provided with a slide block (5) on the left end face. The bottom surface of the bracket (1) is equipped with a forward and backward oil cylinder (6) that drives the slide block (5) to move and pushes the core rod (3) to move towards the core mold of the cold drawing machine. The left end of the core rod (3) is fixedly connected with a sliding rod (7). The slide block (5) is provided with a spring sleeve (8) of the same number as the core rod (3). The spring sleeve (8) is provided with a compression spring (9). The right end of the compression spring (9) is connected to the left end of the sliding rod (7). The left end of the compression spring (9) is connected to a screw (10) for finely adjusting the position of the core rod (3) in the length direction. The screw (10) is threaded with a nut that locks the screw (10) after the metal tube length compensation is in place.

2. The metal tube length compensation device for cold drawing machine as described in claim 1, characterized in that: The bracket (1) is fixed with guide rails (11) on the front and rear sides. The inner side of the guide rail (11) has a right angle notch opened along the length direction of the guide rail (11). The right angle notch and the end face of the front and rear sides of the bracket (1) form a sliding groove (12). The bottom of the front and rear sides of the slide block (5) has a protrusion (5-1) that slides with the sliding groove (12).

3. The metal tube length compensation device for cold drawing machine as described in claim 1, characterized in that: The slide (5) includes a base plate (5-2), and end plates (5-3) are fixed at the left and right ends of the base plate (5-2). Three rectangular cavities (5-4) are provided between the end plates (5-3) at intervals. U-shaped grooves are provided on the end plates (5-3) corresponding to the left and right ends of the rectangular cavities (5-4). The compression spring (9) is located in the rectangular cavity (5-4).

4. The metal tube length compensation device for cold drawing machine as described in claim 3, characterized in that: The left end of the sliding rod (7) is connected to the limiting nut (13), and the right end of the compression spring (9) is connected to the limiting nut (13). The sliding rod (7) on the right side of the limiting nut (13) is fitted with a nut cap (14) that is fixed to the right end face of the spring sleeve (8). The right end of the spring sleeve (8) is supported on the outer periphery of the limiting nut (13), and the left end of the spring sleeve (8) is supported on the outer periphery of the right end of the screw (10). The nut includes an inner nut (15) and an outer nut (16). After the inner nut (15) is connected to the screw (10), it is pressed against the right side face of the left end plate (5-3) of the slide block (5). After the outer nut (16) is connected to the screw (10), it is pressed against the left side face of the left end plate (5-3) of the slide block (5).

5. The metal tube length compensation device for cold drawing machine as described in claim 1, characterized in that: The bracket (1) has a right support (17) fixed on its bottom surface, and the slide (5) has a left support (18) fixed on its bottom surface. The fixed end of the forward and backward cylinder (6) is hinged to the right support (17), and the piston rod end of the forward and backward cylinder (6) is hinged to the left support (18).

6. The cold-drawn machine metal tube length compensation device as described in claim 1, characterized in that: A limiting support (19) for controlling the rightward movement of the slide (5) is installed on the bracket (1) at the right end of the slide (5).

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