Full-automatic drawing machine

Abstract

The utility model relates to the technical field of metal processing, in particular to a full-automatic drawing machine which comprises a feeding mechanism, a core penetrating mechanism, a drawing mechanism and a drawing oil supply device, the feeding mechanism comprises a fixed material frame, a side material jacking frame and a conveying belt frame which are adjacent, an upper material jacking rod and a material sliding rod are connected to the fixed material frame, a conveying belt is connected to the conveying belt frame, the bottom end of the conveying belt is located below the material sliding rod, and a sliding groove is formed beside the top end of the conveying belt. The core penetrating mechanism comprises a rotary lifting frame connected to the lower base through a rotating shaft, a core penetrating sliding table and a core penetrating rod are arranged below the rotary lifting frame, and openings of the rotary lifting frame and the lower base face the drawing mechanism; the drawing mechanism comprises a drawing sliding table, a drawing clamp is connected to the drawing sliding table, and a material supporting and pushing device is arranged beside the drawing sliding table; feeding, core penetrating and drawing processes are smoothly connected, the moving distance of blanks is short, the inner diameter and the outer diameter of the blanks are adjusted to the required finished product size, the concentricity of products is improved, and the mechanical performance and the surface quality of the products are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal processing, in particular to a full-automatic drawing machine. Background Art

[0002] Drawing is a key process in steel pipe production, offering advantages such as high precision, high material utilization, and a wide range of applications. It is widely used in fields such as construction and machinery manufacturing. Steel pipe drawing applies tensile force to the steel pipe, causing it to plastically deform within the constraints of a die. This reduces the pipe's diameter and improves its dimensional accuracy and surface quality. During the drawing process, the pipe's cross-sectional area decreases while its length increases.

[0003] Traditional steel pipe drawing equipment has unreasonable operation processes and structural designs, usually requiring a lot of manual intervention. This is not only labor-intensive and inefficient, but also difficult to ensure drawing quality. Therefore, it is necessary to provide an automatic drawing machine with a reasonable structure, high degree of automation, and high production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a fully automatic drawing machine with reasonable structure, high automation degree and high production efficiency.

[0005] In order to solve the above technical problems, the solution adopted by the present invention is:

[0006] A fully automatic drawing machine comprises a feeding mechanism, a core threading mechanism, a drawing mechanism and a drawing oil supply device;

[0007] The feeding mechanism includes adjacent fixed material racks, side material racks and conveyor belt racks. The fixed material rack is connected to an upper material rack and a sliding material rack via a rotating shaft. The conveyor belt rack is connected to a conveyor belt via a rotating wheel. The bottom end of the conveyor belt is located below the sliding material rack. An inclined chute is provided beside the top end of the conveyor belt.

[0008] The core-threading mechanism includes a rotating lifting frame movably connected to a lower base via a rotating shaft, a core-threading slide and a core-threading rod are sequentially arranged below the rotating lifting frame from top to bottom, a core-threading alignment sleeve and a core-threading clamp are fixedly connected to the bottom surface of the core-threading slide, and a size-variable opening formed between the rotating lifting frame and the lower base faces the pulling mechanism;

[0009] The drawing mechanism includes a drawing slide movably connected to the lower base through a guide rail, a drawing fixture is fixedly connected to the drawing slide, and a material supporting and pushing device is provided on the side of the drawing slide.

[0010] Furthermore, a gap is provided between the fixed material rack and the side ejector rack for the blank to pass up and down, the upper ejector rod is higher than the sliding rod, and a slope is provided on the top of the fixed material rack which gradually descends toward the side ejector rack. The upper ejector rod and the sliding rod can swing downward near the conveyor belt side, a raised baffle is connected to the outside of the conveyor belt, and the slide groove is inclined downward near the core-threading mechanism side.

[0011] Furthermore, an outer mold is provided at one end of the base below the core-penetrating mechanism near the pulling mechanism, the back-and-forth movement trajectory of the core-penetrating slide is parallel to the central axis of the core-penetrating rod, the end of the core-penetrating rod close to the pulling mechanism is connected to the inner mold, and the end of the core-penetrating rod away from the pulling mechanism is connected to the telescopic cylinder.

[0012] Furthermore, the core-penetrating clamp is closer to the drawing mechanism than the core-penetrating alignment sleeve, and both ends of the core-penetrating alignment sleeve are provided with openings whose diameters gradually decrease toward the center and are through-connected.

[0013] Furthermore, a column is provided beside the rotating lifting frame, and the column is connected to the rotating lifting frame through a telescopic cylinder.

[0014] Furthermore, a motor is provided on the drawing slide, a gear is connected to the motor shaft, and a rack meshing with the gear is provided on the base below the drawing slide.

[0015] Furthermore, the drawing fixture includes a longitudinal pressure block and a transverse clamp, the transverse clamp includes two symmetrically arranged fixed blocks, two symmetrical movable blocks are arranged between the two fixed blocks, the fixed blocks and the movable blocks are movably connected one by one through inclined surfaces, the adjacent surfaces of the two movable blocks are toothed planes, and the movable blocks are connected to the drawing slide through a telescopic cylinder.

[0016] Furthermore, a supporting roller is provided under the core rod, and the supporting roller includes a fixed supporting roller and a lifting supporting roller. The fixed supporting roller is fixed to the rotating lifting frame and moves synchronously, and the lifting supporting roller is connected to the base under the rotating lifting frame through a cylinder.

[0017] Furthermore, a downward pressing block is provided at one end of the slideway near the core-penetrating mechanism, and the downward pressing block is connected to the slideway via a lifting cylinder.

[0018] Furthermore, the drawing oil supply device includes a pump, an oil pipe and an oil outlet nozzle which are connected in sequence, and the oil outlet nozzle is arranged next to the hole in the center of the outer mold.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The utility model has a reasonable structure and a high degree of automation. The loading, core threading and drawing processes are connected quickly and smoothly. The moving distance of the blank in the equipment is short, which reduces manual intervention and improves production efficiency. In addition, by replacing different inner and outer dies, it can adapt to the drawing needs of metal blanks of different specifications and materials; it can adjust the inner and outer diameters of the blank to the required finished product size, and can also improve the concentricity of the product, and enhance the mechanical properties and surface finish of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 2 Schematic diagram of the three-dimensional structure of the feeding mechanism;

[0023] Figure 3 It is a side structural diagram of the feeding mechanism;

[0024] Figure 4 It is a schematic diagram of the front structure of the core-through mechanism;

[0025] Figure 5 for Figure 4 A in the middle is an enlarged schematic diagram;

[0026] Figure 6 Schematic diagram of the three-dimensional structure of the core-through mechanism;

[0027] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0028] Figure 8 for Figure 6 The enlarged schematic diagram of point C in the middle;

[0029] Figure 9 Schematic diagram of the three-dimensional structure of the drawing mechanism;

[0030] Figure 10 for Figure 9 The enlarged schematic diagram of point D in the middle;

[0031] Figure 11 for Figure 9 The enlarged schematic diagram at E in the middle;

[0032] Figure 12 Schematic diagram of the three-dimensional structure of the drawing fixture;

[0033] Figure 13 It is a schematic diagram of the three-dimensional structure of the material supporting and pushing device.

[0034] In the figure: 1. Feeding mechanism; 1a. Fixed material rack; 1a-1. Upper material push rod; 1a-2. Sliding material rod; 1b. Side material rack; 1c. Conveyor belt rack; 1c-1. Conveyor belt; 1d. Slide; 1d-1. Pressing block; 2. Core-threading mechanism; 2a. Rotating lifting frame; 2b. Core-threading slide; 2b-1. Core-threading alignment sleeve; 2b-2. Core-threading fixture; 2c. Core-threading rod; 2c-1. Inner mold; 2d. Supporting roller; 2d-1. Fixed supporting roller; 2d-2. Lifting supporting roller; 2e. Column; 2f. Outer mold; 3. Drawing mechanism; 3a. Drawing slide; 3a-1. Drawing fixture; 3a-101. Longitudinal pressure block; 3a-102. Horizontal clamp; 3a-2. Motor; 3b. Material supporting and pushing device. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] like Figures 1 to 13 As shown, a fully automatic drawing machine includes a feeding mechanism 1, a core-threading mechanism 2, a drawing mechanism 3 and a drawing oil supply device;

[0037] The loading mechanism 1 includes adjacent fixed material racks 1a, side material racks 1b and conveyor belt racks 1c. The fixed material rack 1a is connected to an upper material rack 1a-1 and a sliding material rack 1a-2 by a rotating shaft, and the conveyor belt rack 1c is connected to the conveyor belt 1c-1 by a rotating wheel. The bottom end of the conveyor belt 1c-1 is located below the sliding material rack 1a-2, and an inclined slide 1d is provided on the side of the top of the conveyor belt 1c-1 for conveying the blank to the core-threading mechanism 2; a gap is provided between the fixed material rack 1a and the side material rack 1b for the blank to pass up and down, the upper material rack 1a-1 is higher than the sliding material rack 1a-2, and the top of the fixed material rack 1a is provided with a slope gradually lowering toward the side material rack 1b, and the upper material rack 1a-1 and the sliding material rack 1a-2 can swing downward near the side of the conveyor belt 1c-1, and a raised baffle is connected to the outside of the conveyor belt 1c-1, and the slide 1d is inclined downward near the side of the core-threading mechanism 2. A downward pressing block 1d-1 is provided at one end of the chute 1d near the core-threading mechanism 2. The downward pressing block 1d-1 is connected to the chute 1d through a lifting cylinder. When the downward pressing block 1d-1 is pressed downward, it can limit the slippage of the blank in the chute 1d.

[0038] Specifically, the core-threading mechanism 2 includes a rotating lifting frame 2a movably connected to the lower base through a rotating shaft, and a core-threading slide 2b and a core-threading rod 2c are arranged in sequence from top to bottom below the rotating lifting frame 2a. The bottom surface of the core-threading slide 2b is fixedly connected to the core-threading alignment sleeve 2b-1 and the core-threading clamp 2b-2. The variable-size opening formed between the rotating lifting frame 2a and the lower base faces the drawing mechanism 3; a column 2e is provided on the side of the rotating lifting frame 2a, and the column 2e is connected to the rotating lifting frame 2a through a telescopic cylinder. By controlling the operation of the vertically placed telescopic cylinder, the angle formed between the rotating lifting frame 2a and the lower base can be controlled to change, so that the rotating lifting frame 2a can be lifted and lowered with the core-threading slide 2b and the core-threading rod 2c. The rotating axis connecting the rotating lifting frame 2a and the lower base is located at the end away from the drawing mechanism 3.

[0039] An outer die 2f is located at the base of the core-threading mechanism 2, near the end of the drawing mechanism 3. The back-and-forth trajectory of the core-threading slide 2b is parallel to the central axis of the core-threading rod 2c. The end of the core-threading rod 2c, which is closest to the drawing mechanism 3, is connected to the inner die 2c-1. The end of the core-threading rod 2c, which is further away from the drawing mechanism 3, is connected to a telescopic cylinder that controls the movement of the inner die 2c-1 toward or away from the outer die 2f. The die is made of high-strength material with excellent wear resistance and deformation resistance. Its shape and size determine the shape and dimensional accuracy of the drawn steel pipe.

[0040] The core-penetrating clamp 2b-2 is closer to the drawing mechanism 3 than the core-penetrating alignment sleeve 2b-1. Both ends of the core-penetrating alignment sleeve 2b-1 are provided with openings with a diameter gradually decreasing toward the center and the two ends are through-hole. The opening on one side is convenient for the insertion of the blank, and the opening on the other side is convenient for the insertion of the core-penetrating rod 2c, ensuring that the core-penetrating rod 2c can be smoothly inserted into the steel pipe blank.

[0041] At the same time, a supporting roller 2d for supporting the steel pipe is provided under the core rod 2c. The supporting roller 2d includes a fixed supporting roller 2d-1 and a lifting supporting roller 2d-2. The fixed supporting roller 2d-1 is fixed to the rotating lifting frame 2a and moves synchronously. The lifting supporting roller 2d-2 is connected to the base under the rotating lifting frame 2a through a cylinder.

[0042] The drawing mechanism 3 includes a drawing slide 3a movably connected to the lower base through a guide rail, and a drawing clamp 3a-1 is fixedly connected to the drawing slide 3a. The drawing clamp 3a-1 includes a longitudinal pressure block 3a-101 and a transverse clamp 3a-102. The transverse clamp 3a-102 includes two symmetrically arranged fixed blocks, and two symmetrical movable blocks are arranged between the two fixed blocks. The fixed blocks and the movable blocks are movably connected to each other through inclined surfaces. The adjacent surfaces of the two movable blocks are toothed planes. The movable blocks are connected to the drawing slide 3a through a telescopic cylinder. Through the action of the telescopic cylinder, the drawing clamp 3a-1 can firmly clamp the steel pipe to prevent the steel pipe from sliding during the drawing process, thereby ensuring the effective transmission of the drawing force. The cylinder drive ensures that the clamping force is of moderate size. A motor 3a-2 is provided on the drawing slide 3a, and the rotating shaft of the motor 3a-2 is connected to a gear. A rack meshing with the gear is provided on the base below the drawing slide 3a. The rotation of the motor 3a-2 drives the drawing slide 3a to move horizontally on the base below it, approaching or moving away from the outer mold 2f. The gear is a helical gear with smooth transmission and strong load-bearing capacity, so that the drawing slide 3a has sufficient drawing force and moving accuracy to perform drawing actions.

[0043] A material support and pusher device 3b is installed next to the drawing slide 3a. This device is used to push the finished drawn product to the next process equipment. Specifically, the material support and pusher device 3b includes a rotating mechanism and a horizontal pusher mechanism connected to it. The rotating mechanism drives the horizontal pusher mechanism to rotate. The head end of the horizontal pusher mechanism is equipped with a carrier and a pusher block. The pusher block is driven by a cylinder to move linearly back and forth on the carrier.

[0044] The drawing oil supply system consists of a pump, oil pipe, and oil nozzle connected in sequence. The oil nozzle is located near the hole in the center of the outer die 2f. During the drawing process, the drawing oil is sprayed toward the center of the outer die 2f, forming a lubricating film between the metal and the die. This reduces friction between the metal blank and the die, significantly reducing scratches on the metal blank surface and die wear, thereby improving the surface quality of the drawn product and the life of the die. The drawing process also generates a large amount of heat, which the drawing oil absorbs and dissipates, lowering the temperature of the metal and die, and maintaining the die's hardness and dimensional stability.

[0045] This fully automatic drawing machine automates the steel pipe drawing process. The control system uses a PLC controller to centrally control the feeding mechanism 1, core feeding mechanism 2, drawing mechanism 3, and the drawing oil supply device. This machine automatically performs feeding, clamping, and drawing operations. According to pre-set procedures and parameters, it precisely controls parameters such as clamping force, drawing force, and drawing speed during the drawing process, enabling continuous production and improving steel pipe drawing quality and production efficiency.

[0046] When a fully automatic drawing machine of the present invention is working, the telescopic cylinder drives the upper material rod 1a-1 and the sliding material rod 1a-2 to swing, and the pile of materials on the fixed material rack 1a falls down through the inclined surface to contact the conveyor belt 1c-1, and the baffle on the conveyor belt 1c-1 lifts the blank to the slide 1d, and the downward pressing block 1d-1 at one end of the slide 1d near the core-threading mechanism 2 presses down and fixes the blank, and the rotating lifting frame 2a rises until the core-threading rod 2c is aligned with the blank, and the core-threading slide 2b moves. The core-threading clamp 2b-2 below it clamps one end of the blank, and the downward pressing block 1d-1 is released, and the core-threading slide 2b moves to the side away from the slide 1d for core-threading. After the core-threading rod 2c is inserted into the blank and is in place, the angle formed between the rotating lifting frame 2a and the lower base is reduced. The rotating lifting frame 2a lowers the core-threading slide 2b, core-threading rod 2c, and blank. The core-threading rod 2c, with its inner die 2c-1 at its head, moves toward the drawing mechanism 3 until it engages the outer die 2f. The drawing slide 3a moves to the side near the core-threading mechanism 2. After the drawing fixture 3a-1 clamps the blank's head, the motor 3a-2 rotates to move the drawing slide 3a away from the core-threading mechanism 2. The metal blank is subjected to uniform pressure in the die, achieving plastic deformation. After the entire blank is released from the die, the drawing fixture 3a-1 opens, and the drawing slide 3a stops moving. During this process, the horizontal push mechanism on the material support and pusher device 3b rotates and extends to receive the material, and then the push block pushes the blank forward to the next process equipment (the straightening machine feed mechanism). This automatic drawing machine can achieve continuous and automatic drawing of metal blanks, improving production efficiency, reducing labor intensity, and ensuring consistent product quality.

[0047] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, any changes, modifications or additions should fall within the protection scope of the present invention.

Claims

1. A fully automatic drawing machine, characterized in that: It comprises a feeding mechanism (1), a core-threading mechanism (2), a drawing mechanism (3) and a drawing oil supply device; The feeding mechanism (1) comprises adjacent fixed material racks (1a), side material racks (1b) and conveyor belt racks (1c); the fixed material rack (1a) is connected to an upper material rack (1a-1) and a sliding material rack (1a-2) via a rotating shaft; the conveyor belt rack (1c) is connected to a conveyor belt (1c-1) via a rotating wheel; the bottom end of the conveyor belt (1c-1) is located below the sliding material rack (1a-2); and an oblique chute (1d) is provided on the side of the top end of the conveyor belt (1c-1); The core-threading mechanism (2) comprises a rotating lifting frame (2a) movably connected to a lower base via a rotating shaft, a core-threading slide (2b) and a core-threading rod (2c) are sequentially arranged below the rotating lifting frame (2a) from top to bottom, a core-threading alignment sleeve (2b-1) and a core-threading clamp (2b-2) are fixedly connected to the bottom surface of the core-threading slide (2b), and a variable-size opening formed between the rotating lifting frame (2a) and the lower base faces the drawing mechanism (3); The drawing mechanism (3) comprises a drawing slide (3a) movably connected to a lower base via a guide rail, a drawing fixture (3a-1) is fixedly connected to the drawing slide (3a), and a material supporting and pushing device (3b) is provided on the side of the drawing slide (3a).

2. A fully automatic drawing machine according to claim 1, characterized in that: A gap is provided between the fixed material rack (1a) and the side material rack (1b) for the blank to pass through up and down; the upper material rack (1a-1) is higher than the sliding material rack (1a-2); a slope is provided on the top of the fixed material rack (1a) that gradually descends toward the side material rack (1b); the upper material rack (1a-1) and the sliding material rack (1a-2) can swing downward near the conveyor belt (1c-1); a raised baffle is connected to the outside of the conveyor belt (1c-1); and the slide groove (1d) is inclined downward near the core-penetrating mechanism (2).

3. The fully automatic drawing machine according to claim 2, characterized in that: An outer mold (2f) is provided at one end of the base below the core-penetrating mechanism (2) near the drawing mechanism (3); the reciprocating trajectory of the core-penetrating slide (2b) is parallel to the central axis of the core-penetrating rod (2c); the end of the core-penetrating rod (2c) near the drawing mechanism (3) is connected to an inner mold (2c-1); and the end of the core-penetrating rod (2c) away from the drawing mechanism (3) is connected to a telescopic cylinder.

4. A fully automatic drawing machine according to claim 3, characterized in that: The core-penetrating clamp (2b-2) is closer to the drawing mechanism (3) than the core-penetrating alignment sleeve (2b-1). Both ends of the core-penetrating alignment sleeve (2b-1) are provided with openings whose diameters gradually decrease toward the center, and both ends are connected.

5. The fully automatic drawing machine according to claim 4, characterized in that: A column (2e) is provided on the side of the rotating lifting frame (2a), and the column (2e) is connected to the rotating lifting frame (2a) via a telescopic cylinder.

6. The fully automatic drawing machine according to claim 1, characterized in that: A motor (3a-2) is provided on the drawing slide (3a), a rotating shaft of the motor (3a-2) is connected to a gear, and a rack meshing with the gear is provided on a base below the drawing slide (3a).

7. The fully automatic drawing machine according to claim 6, characterized in that: The drawing clamp (3a-1) comprises a longitudinal pressing block (3a-101) and a transverse clamp (3a-102); the transverse clamp (3a-102) comprises two symmetrically arranged fixed blocks, two symmetrical movable blocks are arranged between the two fixed blocks, the fixed blocks and the movable blocks are movably connected to each other via inclined surfaces, the adjacent surfaces of the two movable blocks are toothed planes, and the movable blocks are connected to the drawing slide (3a) via a telescopic cylinder.

8. The fully automatic drawing machine according to claim 5, characterized in that: A supporting roller (2d) is provided below the core-penetrating rod (2c), and the supporting roller (2d) comprises a fixed supporting roller (2d-1) and a lifting supporting roller (2d-2). The fixed supporting roller (2d-1) is fixed to and moves synchronously with the rotating lifting frame (2a), and the lifting supporting roller (2d-2) is connected to a base below the rotating lifting frame (2a) via a cylinder.

9. The fully automatic drawing machine according to claim 2, characterized in that: A downward pressing block (1d-1) is provided at one end of the slide groove (1d) near the core-penetrating mechanism (2), and the downward pressing block (1d-1) is connected to the slide groove (1d) via a lifting cylinder.

10. The fully automatic drawing machine according to claim 1, characterized in that: The drawing oil supply device comprises a pump, an oil pipe and an oil outlet nozzle which are connected in sequence, and the oil outlet nozzle is arranged beside the hole in the center of the outer mold (2f).

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