Drawing mechanism for stainless steel pipe machining

Abstract

This utility model relates to the technical field of stainless steel pipe processing equipment, and discloses a drawing mechanism for stainless steel pipe processing, including a frame. A drawing clamp is provided on the top of the frame, and two sets of arc-shaped clamping blocks are symmetrically arranged on the top of the drawing clamp. This stainless steel pipe drawing mechanism, through an innovative composite pad structure and connection method, significantly improves maintenance efficiency while ensuring the drawing quality of stainless steel pipes. The design of the inner and outer arc-shaped rubber-metal wire composite pad avoids the problem of indentation and scratches on the steel pipe surface caused by traditional hard metal clamps by the flexible buffering characteristics of rubber. The embedded metal wire enhances the structural strength and wear resistance, ensuring that the surface quality of the finished product reaches a high precision standard. The composite pad is connected to the clamp by bolts, which facilitates quick replacement when worn without disassembling the entire clamp. This reduces maintenance costs and allows for flexible replacement of composite pads of different specifications according to process requirements, significantly improving the applicability and production efficiency of the equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of stainless steel pipe processing equipment, specifically a drawing mechanism for stainless steel pipe processing. Background Technology

[0002] In the manufacturing process of stainless steel pipes, drawing is an important forming method. By passing the steel pipe billet through a specific mold, it is plastically deformed under tension to obtain the required pipe diameter, wall thickness and surface quality.

[0003] The existing patent document CN215745544U discloses a stainless steel composite tube forming and drawing device. This utility model, by setting up a hydraulic rod, a stop block, a support block, and an electric telescopic rod, allows the stainless steel composite tube to be placed inside the support block. When the stainless steel composite tube is placed inside the support block, the hydraulic rod can extend and retract to allow one end of the composite tube to extend outward through the drawing block by a certain length, which facilitates clamping by the two clamping blocks. At the same time, the electric telescopic rod can open and close the stop block. The stop block and the support block provide support for the periphery of the composite tube, thereby preventing the composite tube from twisting and deforming on the left and right sides of the push plate.

[0004] However, existing drawing mechanisms for stainless steel pipe processing have shortcomings in terms of clamping protection. Traditional hard metal chucks are prone to leaving defects such as indentations and scratches on the surface of steel pipes during the clamping process, which seriously affects the quality of finished products. Moreover, due to the lack of an effective buffer structure, long-term high-frequency drawing operations will cause the contact surface between the chuck and the steel pipe to wear rapidly, resulting in a decrease in clamping force and loosening and displacement of the steel pipe. This not only increases the scrap rate but may also cause equipment failure. In addition, existing mechanisms mostly adopt an integrated clamping design, which requires the entire chuck assembly to be replaced after wear. This results in high maintenance costs and long maintenance time, making it difficult to meet the needs of modern high-efficiency production. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a drawing mechanism for processing stainless steel pipes, so as to solve the problem that the existing drawing mechanisms for processing stainless steel pipes mentioned in the background art are insufficient in terms of clamping and protection.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a drawing mechanism for processing stainless steel pipes, including a frame, a drawing clamp seat above the frame, two sets of arc-shaped clamping blocks symmetrically arranged above the drawing clamp seat, and an arc-shaped abutment block in the middle above the drawing clamp seat.

[0009] Both sets of arc-shaped clamping blocks have inner arc-shaped rubber-metal wire composite pads embedded on their opposite surfaces and are fastened by outer peripheral bolts. The bottom end of the arc-shaped abutment block is movably inserted into the outer arc-shaped rubber-metal wire composite pad and locked by the top bolt. Both the inner arc-shaped rubber-metal wire composite pad and the outer arc-shaped rubber-metal wire composite pad are made of a material with a rubber-wrapped metal wire structure.

[0010] As a further improvement to the above solution, a support block is fixedly provided in the middle of the upper surface of the pull-out clamp, the arc-shaped abutment block is located directly above the support block, and a fixing plate is provided on one side of the upper surface of the pull-out clamp.

[0011] As a further improvement to the above solution, a micro motor is installed on one side inside the fixed plate, and a bidirectional lead screw is fixedly connected to the transmission end of the micro motor. The end of the bidirectional lead screw away from the micro motor is connected to the fixed plate through a bearing.

[0012] As a further improvement to the above solution, the outer surface of the bidirectional lead screw is connected to an adjusting block by a thread. The adjusting block is slidably engaged with the fixed plate. A connecting plate is connected to one side of the adjusting block, and the arc-shaped clamping block is located on the upper surface of the connecting plate.

[0013] As a further improvement to the above solution, an L-shaped plate is vertically connected to the middle of the upper surface of the fixed plate, and a hydraulic telescopic cylinder is installed at the bottom end of the parallel surface of the L-shaped plate. The arc-shaped abutment block is fixed to the transmission end of the bottom end of the hydraulic telescopic cylinder.

[0014] As a further improvement to the above solution, a fixing groove is provided on one side of the upper surface of the frame, and a pulling motor is installed on one side inside the fixing groove. The transmission end of the pulling motor is fixedly connected to a drive screw.

[0015] As a further improvement to the above solution, the end of the drive screw away from the pulling motor is connected to the bearing fixing groove, and the outer surface of the drive screw is connected to a moving block by a thread, the moving block slidingly engaging with the fixing groove.

[0016] As a further improvement to the above solution, the pull clamp is located on top of the moving block, and a guide block is connected to the bottom end of the pull clamp away from the moving block. The guide block slides in cooperation with a groove opened on the surface of the frame.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This stainless steel pipe processing drawing mechanism, through its innovative composite pad structure and connection method, significantly improves maintenance efficiency while ensuring the drawing quality of stainless steel pipes. The design of the inner and outer arc-shaped rubber and metal wire composite pads avoids the problem of indentation and scratches on the steel pipe surface caused by traditional hard metal clamps by using the flexible buffering properties of rubber. The embedded metal wire enhances the structural strength and wear resistance, ensuring that the surface quality of the finished product reaches high precision standards. The composite pad is connected to the clamp by bolts, which facilitates quick replacement when worn without disassembling the entire clamp. This reduces maintenance costs and allows for flexible replacement of composite pads of different specifications according to process requirements, significantly improving the applicability of the equipment and production efficiency.

[0019] 2. This stainless steel pipe processing drawing mechanism achieves precise and automated processing by incorporating a micro motor and a hydraulic telescopic cylinder. The micro motor drives the bidirectional lead screw to rotate, causing the adjusting block and connecting plate to move precisely, thereby flexibly adjusting the spacing of the arc-shaped clamping blocks and quickly adapting to stainless steel pipes of different diameters. The hydraulic telescopic cylinder precisely controls the lifting and pressing of the arc-shaped abutment block, pushing the outer arc-shaped rubber-metal wire composite pad to tightly adhere to the inner wall of the steel pipe. Together with the support block, it forms a stable clamping mechanism in both the inner and outer directions. The two work together to ensure stable fixation of the pipe and to adjust parameters in real time according to the drawing process requirements, significantly improving drawing accuracy and processing efficiency.

[0020] 3. This stainless steel pipe processing drawing mechanism, through the installation of a drawing motor, provides strong and stable power output for the entire drawing process. The drawing motor drives the screw to rotate, causing the moving block to slide along the fixed groove, thereby pulling the drawing clamp to move smoothly, achieving efficient drawing of stainless steel pipes. Compared with traditional power devices, the drawing motor can precisely control the drawing speed and pulling force. Combined with the dual guiding structure of the guide block and the slide groove, it effectively reduces the deviation and shaking during the drawing process, improves the drawing accuracy and the forming quality of the steel pipe, and adapts to the drawing needs of stainless steel pipes of different specifications and materials, significantly enhancing the practicality and production efficiency of the equipment. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the fixing plate of this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of the connecting plate of this utility model;

[0024] Figure 4 This is a schematic diagram of the arc-shaped clamping block and the three-dimensional inner arc surface rubber-metal wire composite pad structure of this utility model;

[0025] Figure 5This is a schematic diagram of the three-dimensional structure of the arc-shaped abutment block and the outer arc-shaped rubber-metal wire composite pad of this utility model.

[0026] In the diagram: 1. Frame; 2. Pulling clamp; 3. Arc-shaped clamping block; 4. Arc-shaped abutment block; 5. Inner arc surface rubber-metal wire composite pad; 6. Outer arc surface rubber-metal wire composite pad; 7. Support block; 8. Fixing plate; 9. Micro motor; 10. Bidirectional lead screw; 11. Adjusting block; 12. Connecting plate; 13. L-shaped plate; 14. Hydraulic telescopic cylinder; 15. Fixing groove; 16. Pulling motor; 17. Drive screw; 18. Moving block; 19. Guide block. Detailed Implementation

[0027] 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 protection scope of the present utility model.

[0028] Please see Figure 1 - Figure 5 The present invention provides a technical solution: a drawing mechanism for processing stainless steel pipes, including a frame 1, a drawing clamp 2 is provided above the frame 1, two sets of arc-shaped clamping blocks 3 are symmetrically arranged above the drawing clamp 2, and an arc-shaped abutment block 4 is provided in the middle above the drawing clamp 2.

[0029] Both sets of arc-shaped clamping blocks 3 have inner arc-shaped rubber-metal wire composite pads 5 embedded on their opposite surfaces and are fastened by outer peripheral bolts. The bottom end of the arc-shaped abutment block 4 is movably inserted into the outer arc-shaped rubber-metal wire composite pad 6 and locked by the top bolt. Both the inner arc-shaped rubber-metal wire composite pad 5 and the outer arc-shaped rubber-metal wire composite pad 6 are made of rubber-wrapped metal wire structure material.

[0030] The inner arc surface rubber-metal wire composite pad 4 and the outer arc surface rubber-metal wire composite pad 5 have metal wires that enhance rigidity and rubber layers that provide flexible cushioning. While ensuring stable clamping, they effectively prevent indentations or scratches on the steel pipe surface. After the pulling is completed, the hydraulic telescopic cylinder 14 retracts and resets, the arc-shaped abutment block 4 is released, and the arc-shaped clamping block 3 is released simultaneously to facilitate unloading of the steel pipe. If the inner arc surface rubber-metal wire composite pad 4 or the outer arc surface rubber-metal wire composite pad 5 is worn, the operator only needs to use conventional tools to loosen the bolts to quickly disassemble and replace it. After simple calibration, the device can be restored to its optimal working condition to ensure the efficient operation of subsequent pulling operations.

[0031] A support block 7 is fixedly installed in the middle of the upper surface of the puller clamp 2. An arc-shaped abutment block 4 is located directly above the support block 7. A fixing plate 8 is installed on one side of the upper surface of the puller clamp 2. A micro motor 9 is installed on one side inside the fixing plate 8. A bidirectional lead screw 10 is fixedly connected to the transmission end of the micro motor 9. The end of the bidirectional lead screw 10 away from the micro motor 9 is connected to the fixing plate 8 through a bearing. An adjusting block 11 is threadedly connected to the outer surface of the bidirectional lead screw 10. The adjusting block 11 slides with the fixing plate 8. A connecting plate 12 is connected to one side of the adjusting block 11. An arc-shaped clamping block 3 is located on the upper surface of the connecting plate 12. An L-shaped plate 13 is vertically connected to the middle of the upper surface of the fixing plate 8. A hydraulic telescopic cylinder 14 is installed at the bottom end of the parallel surface of the L-shaped plate 13. The arc-shaped abutment block 4 is fixed to the transmission end at the bottom end of the hydraulic telescopic cylinder 14.

[0032] The L-shaped plate 13 precisely inserts into the extruded stainless steel pipe port, and the hydraulic telescopic cylinder 14 quickly presses down, pushing the arc-shaped abutment block 4 to drive the outer arc-shaped rubber-metal wire composite pad 6 to tightly adhere to the inner wall of the steel pipe. At the same time, the support block 7 provides reverse support force, completing the initial axial fixation of the steel pipe. Subsequently, the micro motor 9 starts, and the bidirectional lead screw 10 rotates at high speed under its drive. Through the precision thread pair, it drives the adjusting block 11 to slide along the fixed plate 8. The connecting plates 12 on both sides move synchronously, pushing the arc-shaped clamping block 3 to move smoothly, so that the inner arc-shaped rubber-metal wire composite pad 5 evenly adheres to the outer wall of the steel pipe, forming a bidirectional fixing system of "outer clamp and inner abutment" with the inner wall abutment structure.

[0033] A fixing groove 15 is provided on one side of the upper surface of the frame 1. A pulling motor 16 is installed inside the fixing groove 15 on one side. A drive screw 17 is fixedly connected to the transmission end of the pulling motor 16. The end of the drive screw 17 away from the pulling motor 16 is connected to the bearing fixing groove 15. A moving block 18 is threadedly connected to the outer surface of the drive screw 17. The moving block 18 is slidably engaged with the fixing groove 15. A pulling clamp 2 is located on the top of the moving block 18. A guide block 19 is connected to the bottom end of the pulling clamp 2 away from the moving block 18. The guide block 19 is slidably engaged with the sliding groove opened on the surface of the frame 1.

[0034] During the stainless steel pipe drawing operation, the drawing motor 16 starts first, causing the drive screw 17 to rotate at a constant speed, which drives the moving block 18 to slide smoothly along the guide rail in the fixed groove 15. Under the dual guidance of the guide block 19 and the slide groove of the frame 1, the drawing clamp 2 moves to the discharge port of the drawing machine. After the steel pipe is fixed, the drawing motor 16 exerts force again, driving the screw 17 to pull the drawing clamp 2 to move steadily, so that the steel pipe passes smoothly through the mold. Under the action of the drawing force, the steel pipe undergoes plastic deformation, completing the high-precision forming operation.

[0035] Working principle: During the stainless steel pipe drawing operation, the drawing motor 16 starts first, causing the drive screw 17 to rotate at a constant speed. This drives the moving block 18 to slide smoothly along the guide rail in the fixed groove 15. Under the dual guidance of the guide block 19 and the slide groove of the frame 1, the drawing clamp 2 moves to the discharge port of the drawing machine. At this time, the end of the L-shaped plate 13 precisely extends into the extruded stainless steel pipe end. The hydraulic telescopic cylinder 14 quickly presses down, pushing the arc-shaped abutment block 4 to make the outer arc surface rubber-metal wire composite pad 6 tightly adhere to the inner wall of the steel pipe. At the same time, the support block 7 provides reverse support force, completing the initial axial fixation of the steel pipe. Subsequently, the micro motor 9 starts, and the bidirectional screw 10 rotates at high speed under its drive. Through the precision thread pair, it drives the adjusting block 11 to slide along the fixed plate 8. The connecting plates 12 on both sides move synchronously, pushing the arc-shaped clamping block 3 to move smoothly, so that the inner arc surface rubber-metal wire composite pad... 5. The composite pad is evenly attached to the outer wall of the steel pipe, forming a two-way fixing system of "outer clamp and inner abutment" with the inner wall abutment structure. The metal wire in the composite pad enhances rigidity, and the rubber layer provides flexible cushioning. While ensuring stable clamping, it effectively avoids indentation or scratches on the surface of the steel pipe. After the steel pipe is fixed, the pulling motor 16 exerts force again, driving the screw 17 to pull the pulling clamp 2 to move steadily, so that the steel pipe can pass smoothly through the mold. Under the action of pulling force, the steel pipe undergoes plastic deformation, completing the high-precision forming operation. After the pulling is completed, the hydraulic telescopic cylinder 14 retracts and resets, the arc-shaped abutment block 4 is released, and the clamping block is released at the same time to facilitate the unloading of the steel pipe. If the composite pad is worn, the operator only needs to use conventional tools to loosen the bolts to quickly disassemble and replace the inner and outer arc-shaped composite pads. After simple calibration, the device can be restored to its optimal working state to ensure the efficient operation of subsequent pulling operations.

[0036] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A drawing mechanism for processing stainless steel pipes, comprising a frame (1), characterized in that: A pull-out clamp (2) is provided above the frame (1), and two sets of arc-shaped clamping blocks (3) are symmetrically arranged above the pull-out clamp (2). An arc-shaped abutment block (4) is provided in the middle above the pull-out clamp (2). Both sets of arc-shaped clamping blocks (3) have inner arc-shaped rubber-metal wire composite pads (5) embedded on their opposite surfaces and are fastened by outer peripheral bolts. The bottom end of the arc-shaped abutment block (4) is movably inserted into the outer arc-shaped rubber-metal wire composite pad (6) and locked by the top bolt. Both the inner arc-shaped rubber-metal wire composite pad (5) and the outer arc-shaped rubber-metal wire composite pad (6) are made of rubber-wrapped metal wire structure material.

2. The drawing mechanism for processing stainless steel pipes according to claim 1, characterized in that: A support block (7) is fixedly installed in the middle of the upper surface of the pull-out clamp (2), and the arc-shaped abutment block (4) is located directly above the support block (7). A fixing plate (8) is installed on one side of the upper surface of the pull-out clamp (2).

3. The drawing mechanism for processing stainless steel pipes according to claim 2, characterized in that: A micro motor (9) is installed on one side inside the fixed plate (8). A bidirectional lead screw (10) is fixedly connected to the transmission end of the micro motor (9). The end of the bidirectional lead screw (10) away from the micro motor (9) is connected to the fixed plate (8) through a bearing.

4. The drawing mechanism for processing stainless steel pipes according to claim 3, characterized in that: The outer surface of the bidirectional lead screw (10) is connected to an adjusting block (11) by a thread. The adjusting block (11) is slidably engaged with the fixed plate (8). A connecting plate (12) is connected to one side of the adjusting block (11). The arc-shaped clamping block (3) is located on the upper surface of the connecting plate (12).

5. The drawing mechanism for processing stainless steel pipes according to claim 2, characterized in that: An L-shaped plate (13) is vertically connected to the middle of the upper surface of the fixed plate (8). A hydraulic telescopic cylinder (14) is installed at the bottom of the parallel surface of the L-shaped plate (13). The arc-shaped abutment block (4) is fixed to the transmission end of the bottom of the hydraulic telescopic cylinder (14).

6. The drawing mechanism for processing stainless steel pipes according to claim 1, characterized in that: A fixing groove (15) is provided on one side of the upper surface of the frame (1). A pulling motor (16) is installed on one side inside the fixing groove (15). A drive screw (17) is fixedly connected to the transmission end of the pulling motor (16).

7. The drawing mechanism for processing stainless steel pipes according to claim 6, characterized in that: The end of the drive screw (17) away from the pulling motor (16) is connected to the bearing fixing groove (15). The outer surface of the drive screw (17) is connected to a moving block (18) by a thread. The moving block (18) slides in cooperation with the fixing groove (15).

8. The drawing mechanism for processing stainless steel pipes according to claim 1, characterized in that: The pull clamp (2) is located on the top of the moving block (18). A guide block (19) is connected to the bottom of the pull clamp (2) away from the moving block (18). The guide block (19) slides in cooperation with the groove opened on the surface of the frame (1).

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