Automatic pre-drawing device for stainless steel tube cold-drawing machine

Abstract

This utility model belongs to the field of cold drawing machines for steel pipes, specifically an automatic pre-drawing device for stainless steel pipe cold drawing machines. It includes a cold drawing machine body and a pre-drawing mechanism. The pre-drawing mechanism is fixedly installed on the surface of the cold drawing machine and includes a first fixed frame and a second fixed frame. The first fixed frame is fixedly installed inside the cold drawing machine body, and the second fixed frame is fixedly installed on the top of the cold drawing machine body. When a laser displacement sensor detects the head position of the pipe, a motor and a bidirectional screw drive two extrusion rods to move towards each other, so that the extrusion rods press against the head of the pipe. Subsequently, a hydraulic cylinder drives a pressure block to move downwards, and the pressure block, through a transmission assembly, moves a top block upwards, so that the pressure block and the top block simultaneously extrude the pipe, thereby reducing the size of the pipe head. This not only eliminates the inconvenience and danger of manual operation but also effectively improves the processing efficiency of pipes through fully automatic operation.

Description

Technical Field

[0001] This utility model relates to the field of cold drawing machines for steel pipes, specifically an automatic pre-drawing device for cold drawing machines of stainless steel pipes. Background Technology

[0002] The cold drawing process of high-purity, non-woven stainless steel tubes involves precision cold working and strict purity control, and undergoes rigorous testing such as eddy current testing and hydrostatic testing. Ultimately, it is applied in fields with extremely high material performance requirements, such as aerospace, nuclear power, and medical, meeting the needs for high fatigue strength, corrosion resistance, and biocompatibility. It is a key supporting technology for high-end equipment manufacturing.

[0003] The cold drawing machine is the main equipment for producing cold-drawn tubes. During the multi-pass cold drawing process, the tube needs to undergo a head-pressing process before each cold drawing forming. After the head-pressing process, the head size of the tube is reduced. Only then can the tube with the reduced head size be inserted into the center hole of the mold of the cold drawing machine. Currently, the pre-drawing equipment of the existing cold drawing machine is mostly operated manually, which not only leads to a decrease in tube processing efficiency, but also poses certain dangers. Therefore, to address the above problems, an automatic pre-drawing device for stainless steel tube cold drawing machines is proposed. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, the pre-drawing equipment of cold drawing machines is mostly operated manually, which not only reduces the processing efficiency of pipes but also poses certain dangers. This utility model proposes an automatic pre-drawing device for stainless steel pipe cold drawing machines.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an automatic pre-drawing device for a cold drawing machine for stainless steel pipes, including a cold drawing machine body and a pre-drawing mechanism, wherein the pre-drawing mechanism is fixedly installed on the surface of the cold drawing machine; The pre-drawing mechanism includes a first fixed frame and a second fixed frame. The first fixed frame is fixedly installed inside the main body of the cold drawing machine, and the second fixed frame is fixedly installed on the top of the main body of the cold drawing machine. A pressing rod is slidably connected inside the first fixed frame. A motor is fixedly installed on one side of the first fixed frame, and a bidirectional screw is fixedly connected to the output end of the motor. The threads on both sides of the surface of the bidirectional screw are opposite. One end of the bidirectional screw passes through the first fixed frame and is rotatably connected to the inner cavity of the first fixed frame. A movable plate is fixedly installed at the bottom of the pressing rod, and the movable plate is threaded onto the surface of the bidirectional screw. A laser displacement sensor is fixedly installed on one side of the second fixed frame, and a hydraulic cylinder is fixedly installed on the top of the second fixed frame. The telescopic end of the hydraulic cylinder passes through the second fixed frame and is slidably connected to the inner cavity of the second fixed frame. A pressure block is fixedly connected to the telescopic end of the hydraulic cylinder. A top block is slidably connected inside the second fixed frame. A transmission assembly is provided inside the second fixed frame, and the transmission assembly works in conjunction with the pressure block and the top block.

[0006] Preferably, a limiting groove is formed on the surface of the extrusion rod, and a limiting block is fixedly installed inside the first fixing frame, with the surface of the limiting block slidingly connected to the inner cavity of the limiting groove.

[0007] Preferably, a first positioning block is fixedly installed at one end of the bidirectional screw, and the first positioning block is rotatably connected inside the first fixed frame.

[0008] Preferably, the transmission assembly includes a slide groove, which is formed inside the inner wall of the second fixed frame. Slider blocks are fixedly installed on the surfaces of the pressure block and the top block. The sliders are slidably connected inside the slide groove. Toothed plates are fixedly installed on opposite sides of the two sliders. A rotating shaft is rotatably installed inside the slide groove. A gear is fixedly sleeved on the surface of the rotating shaft. The gear cooperates with the two toothed plates.

[0009] Preferably, a support block is fixedly installed on the surface of the slider, and a support groove is formed on the inner wall of the slide groove, with the support block slidably connected inside the support groove.

[0010] Preferably, each of the two sliders has an opening on its opposite side, and the opening is used in conjunction with the toothed plate.

[0011] Preferably, a bracket is fixedly installed inside the slide groove, the rotating shaft is rotatably connected inside the bracket, and a second positioning block is fixedly installed at both ends of the rotating shaft. The two second positioning blocks are respectively rotatably connected inside the bracket and the second fixed frame.

[0012] The advantages of this utility model are: This invention, by setting a pre-extraction mechanism, when the laser displacement sensor detects the head position of the pipe, drives two extrusion rods to move in opposite directions via a motor and a bidirectional screw, so that the extrusion rods can press down on the head of the pipe. Subsequently, the hydraulic cylinder drives the pressure block to move down, and the pressure block moves the top block up through the transmission component, so that the pressure block and the top block can extrude the pipe synchronously, thereby reducing the size of the pipe head. This not only eliminates the inconvenience and danger caused by manual operation, but also effectively improves the processing efficiency of pipes through fully automatic operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the automatic pre-drawing equipment for a stainless steel pipe cold drawing machine according to the present invention. Figure 2 This is a schematic diagram of the pre-pulling mechanism of this utility model; Figure 3 This is a schematic diagram of the second fixing frame structure of this utility model; Figure 4 This is a schematic diagram of the gear structure of this utility model.

[0015] In the diagram: 1. Cold drawing machine body; 2. Pre-drawing mechanism; 21. First fixed frame; 22. Extrusion rod; 2201. Limiting groove; 2202. Limiting block; 23. Motor; 24. Bidirectional screw; 2401. First positioning block; 25. Moving plate; 26. Second fixed frame; 2601. Hydraulic cylinder; 2602. Laser displacement sensor; 27. Pressing block; 28. Top block; 29. ​​Transmission assembly; 2901. Slide groove; 2902. Slider; 2903. Toothed plate; 2904. Gear; 2905. Support block; 2906. Support groove; 2907. Opening; 2908. Rotating shaft; 2909. Bracket; 2910. Second positioning block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0017] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail. This application discloses an automatic pre-drawing device for a stainless steel tube cold drawing machine. (Refer to...) Figure 1 , Figure 2 and Figure 3 An automatic pre-drawing device for a cold drawing machine for stainless steel pipes includes a cold drawing machine body 1 and a pre-drawing mechanism 2, wherein the pre-drawing mechanism 2 is fixedly installed on the surface of the cold drawing machine. The pre-drawing mechanism 2 includes a first fixed frame 21 and a second fixed frame 26. The first fixed frame 21 is fixedly installed inside the cold drawing machine body 1, and the second fixed frame 26 is fixedly installed on the top of the cold drawing machine body 1. A pressing rod 22 is slidably connected inside the first fixed frame 21. A motor 23 is fixedly installed on one side of the first fixed frame 21. A bidirectional screw 24 is fixedly connected to the output end of the motor 23. The threads on both sides of the surface of the bidirectional screw 24 are opposite. One end of the bidirectional screw 24 passes through the first fixed frame 21 and is rotatably connected to the inner cavity of the first fixed frame 21. A movable... The movable plate 25 is threaded onto the surface of the bidirectional screw 24. A laser displacement sensor 2602 is fixedly installed on one side of the second fixed frame 26. A hydraulic cylinder 2601 is fixedly installed on the top of the second fixed frame 26. The telescopic end of the hydraulic cylinder 2601 passes through the second fixed frame 26 and is slidably connected to the inner cavity of the second fixed frame 26. A pressure block 27 is fixedly connected to the telescopic end of the hydraulic cylinder 26. A top block 28 is slidably connected inside the second fixed frame 26. A transmission assembly 29 is provided inside the second fixed frame 26. The transmission assembly 29 works in conjunction with the pressure block 27 and the top block 28. When the tube is processed using the cold drawing machine body 1, when the tube head passes the second fixed frame 26 and the first fixed frame 21 and moves to the position of the laser displacement sensor 2602, the laser displacement sensor 2602 detects the position of the tube head. At this time, the motor 23 drives the bidirectional screw 24 to rotate, and the bidirectional screw 24 drives the two moving plates 25 to move towards each other, so that the two extrusion rods 22 move towards each other, so that the extrusion rods 22 play the role of pressing the tube head. Then, the hydraulic cylinder 2601 drives the pressure block 27 to move down, and the pressure block 27 moves the top block 28 up through the transmission assembly 29, so that the pressure block 27 and the top block 28 play the role of extruding the tube synchronously, thereby reducing the size of the tube head so that the tube head can pass into the mold center hole of the cold drawing machine body 1, thereby completing the cold drawing of the tube.

[0018] Reference Figure 2A limiting groove 2201 is formed on the surface of the extrusion rod 22, and a limiting block 2202 is fixedly installed inside the first fixing frame 21. The surface of the limiting block 2202 is slidably connected to the inner cavity of the limiting groove 2201. By sliding the surface of the limiting block 2202 to the inner cavity of the limiting groove 2201, the position of the extrusion rod 22 is stabilized by the limiting block 2202 and the limiting groove 2201, so as to ensure that the extrusion rod 22 can stably extrude the head of the pipe.

[0019] Reference Figure 2 A first positioning block 2401 is fixedly installed at one end of the bidirectional screw 24. The first positioning block 2401 is rotatably connected inside the first fixed frame 21. The first positioning block 2401 is rotatably connected inside the first fixed frame 21 to effectively stabilize the position of the bidirectional screw 24 and prevent the position of the bidirectional screw 24 from shifting, which would affect the normal movement of the moving plate 25.

[0020] Reference Figure 3 and Figure 4 The transmission assembly 29 includes a slide groove 2901, which is formed inside the inner wall of the second fixed frame 26. Slider blocks 2902 are fixedly mounted on the surfaces of both the pressure block 27 and the top block 28. The sliders 2902 are slidably connected inside the slide groove 2901. Toothed plates 2903 are fixedly mounted on opposite sides of each slider 2902. A rotating shaft 2908 is rotatably mounted inside the slide groove 2901. A gear 2904 is fixedly sleeved on the surface of the rotating shaft 2908, and the gear 2904 cooperates with the two toothed plates 2903. When the pressure block 27 moves, it drives one of the sliders 2902 to move. One slider 2902 drives the gear 2904 to rotate via one of the toothed plates 2903. The gear 2904 drives the other slider 2902 to move via another clamping plate, causing the other slider 2902 to drive the top block 28 to move. Thus, the pressure block 27 and the top block 28 function to press and hold the pipe head.

[0021] Reference Figure 3 A support block 2905 is fixedly installed on the surface of the slider 2902, and a support groove 2906 is opened on the inner wall of the slide groove 2901. The support block 2905 is slidably connected to the inside of the support groove 2906. By sliding the support block 2905 to the inside of the support groove 2906, the position of the slider 2902 inside the slide groove 2901 can be effectively stabilized, and the slider 2902 is prevented from separating from the slide groove 2901, which would affect the position of the pressure block 27 and the top block 28.

[0022] Reference Figure 3Each of the two sliders 2902 has an opening 2907 on one side opposite to the other. The opening 2907 is used in conjunction with the toothed plate 2903. By setting the opening 2907, the toothed plate 2903 can be effectively prevented from contacting the slider 2902 and affecting the movement range of the slider 2902, thereby ensuring that the pressure block 27 and the top block 28 can perform the clamping work of the pipe head normally.

[0023] Reference Figure 4 A bracket 2909 is fixedly installed inside the slide groove 2901. The rotating shaft 2908 is rotatably connected inside the bracket 2909. A second positioning block 2910 is fixedly installed at both ends of the rotating shaft 2908. The two second positioning blocks 2910 are rotatably connected inside the bracket 2909 and the second fixed frame 26, respectively. By rotatably connecting the two second positioning blocks 2910 inside the bracket 2909 and the second fixed frame 26, the position of the rotating shaft 2908 is effectively stabilized, and the position of the rotating shaft 2908 is prevented from shifting, which would affect the position of the gear 2904.

[0024] Working principle: When processing pipes using the cold drawing machine body 1, when the pipe head passes the second fixed frame 26 and the first fixed frame 21 and moves to the position of the laser displacement sensor 2602, the laser displacement sensor 2602 detects the position of the pipe head. At this time, the motor 23 drives the bidirectional screw 24 to rotate, and the position of the bidirectional screw 24 is stabilized by the first positioning block 2401, so that the bidirectional screw 24 drives the two moving plates 25 to move towards each other, so that the two extrusion rods 22 move towards each other. The position of the extrusion rods 22 is stabilized by the limiting block 2202 and the limiting groove 2201, so that the extrusion rods 22 play the role of pressing the pipe head. Subsequently, the hydraulic cylinder 2601 drives the pressure block 27 to move down, and the pressure block 27 drives one of the sliders 2902 to slide inside the slide groove 2901. The slider 2902 is stabilized by the support block 2905 and the support groove 2906. Position 2, so that one slider 2902 drives one toothed plate 2903 to move, one toothed plate 2903 drives gear 2904 to rotate, and the position of the rotating shaft 2908 is stabilized by bracket 2909 and second positioning block 2910 to stabilize the position of gear 2904, so that gear 2904 drives another toothed plate 2903 to move, so that the other toothed plate 2903 drives another slider 2902 to move simultaneously, and the other slider 2902 drives the top block 28 to move simultaneously, so that the top block 28 and pressure block 27 move towards each other, and the opening 2907 prevents the slider 2902 from affecting the position of toothed plate 2903, so that pressure block 27 and top block 28 play a synchronous role in extruding the tube, thereby reducing the size of the tube head so that the tube head can pass into the mold center hole of the cold drawing machine body 1, thereby completing the cold drawing of the tube.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An automatic pre-drawing device for a stainless steel pipe cold drawing machine, characterized in that: It includes a cold drawing machine body (1) and a pre-drawing mechanism (2), wherein the pre-drawing mechanism (2) is fixedly installed on the surface of the cold drawing machine; The pre-drawing mechanism (2) includes a first fixed frame (21) and a second fixed frame (26). The first fixed frame (21) is fixedly installed inside the cold drawing machine body (1), and the second fixed frame (26) is fixedly installed on the top of the cold drawing machine body (1). A pressing rod (22) is slidably connected inside the first fixed frame (21). A motor (23) is fixedly installed on one side of the first fixed frame (21). A bidirectional screw (24) is fixedly connected to the output end of the motor (23). The threads on both sides of the surface of the bidirectional screw (24) are opposite. One end of the bidirectional screw (24) passes through the first fixed frame (21) and is rotatably connected to the inner cavity of the first fixed frame (21). A moving part is fixedly installed at the bottom of the pressing rod (22). The movable plate (25) is threaded onto the surface of the bidirectional screw (24). A laser displacement sensor (2602) is fixedly installed on one side of the second fixed frame (26). A hydraulic cylinder (2601) is fixedly installed on the top of the second fixed frame (26). The telescopic end of the hydraulic cylinder (2601) passes through the second fixed frame (26) and is slidably connected to the inner cavity of the second fixed frame (26). A pressure block (27) is fixedly connected to the telescopic end of the hydraulic cylinder (26). A top block (28) is slidably connected inside the second fixed frame (26). A transmission assembly (29) is provided inside the second fixed frame (26). The transmission assembly (29) works in conjunction with the pressure block (27) and the top block (28).

2. The automatic pre-drawing device for a stainless steel pipe cold drawing machine according to claim 1, characterized in that: The surface of the extrusion rod (22) is provided with a limiting groove (2201), and a limiting block (2202) is fixedly installed inside the first fixing frame (21). The surface of the limiting block (2202) is slidably connected to the inner cavity of the limiting groove (2201).

3. An automatic pre-drawing device for a stainless steel pipe cold drawing machine according to claim 1, characterized in that: One end of the bidirectional screw (24) is fixedly installed with a first positioning block (2401), and the first positioning block (2401) is rotatably connected inside the first fixed frame (21).

4. An automatic pre-drawing device for a stainless steel pipe cold drawing machine according to claim 1, characterized in that: The transmission assembly (29) includes a slide groove (2901), which is opened inside the inner wall of the second fixed frame (26). Slider blocks (2902) are fixedly installed on the surfaces of the pressure block (27) and the top block (28). The sliders (2902) are slidably connected inside the slide groove (2901). Tooth plates (2903) are fixedly installed on opposite sides of the two sliders (2902). A rotating shaft (2908) is rotatably installed inside the slide groove (2901). A gear (2904) is fixedly sleeved on the surface of the rotating shaft (2908). The gear (2904) cooperates with the two tooth plates (2903).

5. An automatic pre-drawing device for a stainless steel pipe cold drawing machine according to claim 4, characterized in that: A support block (2905) is fixedly installed on the surface of the slider (2902), and a support groove (2906) is provided on the inner wall of the slide groove (2901). The support block (2905) is slidably connected to the inside of the support groove (2906).

6. An automatic pre-drawing device for a stainless steel tube cold drawing machine according to claim 4, characterized in that: Each of the two sliders (2902) has an opening (2907) on one side opposite to the other, and the opening (2907) is used in conjunction with the toothed plate (2903).

7. An automatic pre-drawing device for a stainless steel tube cold drawing machine according to claim 4, characterized in that: A bracket (2909) is fixedly installed inside the slide (2901). The rotating shaft (2908) is rotatably connected inside the bracket (2909). A second positioning block (2910) is fixedly installed at both ends of the rotating shaft (2908). The two second positioning blocks (2910) are rotatably connected inside the bracket (2909) and the second fixing frame (26), respectively.

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