CN113351664B

CN113351664B - Special-shaped steel drawing method and drawing device

Info

Publication number: CN113351664B
Application number: CN202110617875.6A
Authority: CN
Inventors: 李健
Original assignee: Wuxi Guangxing Dongmao Technology Co ltd
Current assignee: Wuxi Guangxing Dongmao Technology Co ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2022-03-29
Anticipated expiration: 2041-06-03
Also published as: CN113351664A

Abstract

The invention discloses a special-shaped steel drawing method and a drawing device, wherein the drawing method comprises the following steps: preparing a plurality of deformed steel extension pipes with different diameter specifications, wherein the maximum pipe diameter of each extension pipe is the size of a target deformed steel pipe; sequentially placing the inner modules into extension pipes with corresponding sizes, and placing the front ends of the extension pipes into outer die sleeves with corresponding sizes; welding the extension pipe to the front end of the pipe blank in sequence from the small pipe diameter to the small pipe diameter, and sleeving an inner module and an outer die corresponding to the extension pipe on the extension pipe to move; and step four, fixing each outer die sleeve, pulling the pipe blank forwards along the axial direction of the pipe blank, enabling the pipe blank to sequentially pass through the plurality of outer die sleeves, and completing continuous drawing of the pipe blank.

Description

Special-shaped steel drawing method and drawing device

Technical Field

The invention relates to the technical field of steel processing, in particular to a special-shaped steel drawing method and a drawing device.

Background

With the higher requirements of industries such as engineering machinery, ship petroleum and the like on steel pipes, high-precision and high-performance cold-drawn special pipes are beginning to be applied in a large quantity. In general, when a steel pipe is cold-drawn, in order to achieve the dimensional accuracy of the steel pipe, one-time drawing forming with large deformation is not adopted, but the steel pipe is drawn for multiple times, so that the steel pipe gradually reaches the target dimension. For the multiple drawing process, in the prior art, the steel pipe is drawn once, namely, the die is replaced after the steel pipe is drawn once, and then the steel pipe is drawn for the second time, so that the processing efficiency is low.

Disclosure of Invention

The invention aims to solve the problem that the multi-time drawing process in the prior art is low in efficiency, and provides a special-shaped steel drawing method and a drawing device, which are used for improving the multi-time drawing efficiency of a steel pipe.

In order to achieve the purpose, the invention adopts the following technical scheme:

a special-shaped steel drawing method comprises the following steps:

the method comprises the following steps: preparing a plurality of deformed steel extension pipes with different diameter specifications, wherein the maximum pipe diameter of each extension pipe is the size of a target deformed steel pipe; preparing an inner die block and an outer die sleeve which correspond to the size of the extension pipe;

step two: sequentially placing the inner modules into extension pipes with corresponding sizes, and placing the front ends of the extension pipes into outer die sleeves with corresponding sizes;

step three: welding the extension pipe to the front end of the pipe blank in sequence from small to small according to the pipe diameter, and attaching the inner module and the outer die sleeve corresponding to the extension pipe;

step four: and fixing each outer die sleeve, pulling the tube blank forwards along the axial direction of the tube blank, and enabling the tube blank to sequentially pass through the plurality of outer die sleeves to finish continuous drawing of the tube blank.

By the drawing method, the processed steel pipe can be drawn and shaped for many times through a plurality of dies by one-time drawing, the drawing efficiency is high, and in the drawing process, the steel pipe is heated in the first drawing process, so that the smooth proceeding of the following drawing process can be assisted.

The invention also provides a drawing method and a drawing device based on the special-shaped steel, wherein the drawing device comprises a base, a top support, an outer mold fixing sleeve, a cutting tool, a drawing seat, a front support assembly and a rear support assembly for supporting the processed steel pipe.

Specifically, a top support is arranged above the base, and a die sleeve sliding frame and a cutter sliding frame are arranged on the top support. The fixed cover of external mold is connected through the lifter to the sliding part lower extreme of die sleeve carriage, and the fixed cover of external mold is used for fixed outer die sleeve, the fixed cover of external mold and the horizontal sliding connection of die sleeve carriage, cutter die sleeve carriage set up the fixed cover horizontal migration's of drive external mold driving piece, and the position of the fixed cover of external mold can remove to the interval between the outer die sleeve in the adaptation extension nest of tubes.

Furthermore, an air cylinder is arranged on the inner edge of the outer die fixing sleeve, the axis of the air cylinder passes through the central axis of the outer die fixing sleeve and is perpendicular to the central axis of the outer die fixing sleeve, and the working end of the air cylinder is fixedly connected with a limiting block corresponding to the external limiting hole of the outer die sleeve. When the outer die sleeve is positioned in the outer die fixing sleeve, the limiting hole outside the outer die sleeve is aligned to the limiting block, and the air cylinder pushes the limiting block to enable the limiting block to enter the limiting hole of the outer die sleeve for positioning the outer die sleeve.

Furthermore, pull out the seat sliding connection on the base, the base sets up the driving piece that the drive pulled out the seat horizontal migration. The pulling seat is provided with a rotating ring which is rotatably connected with the pulling seat, the rotating ring and the outer mold fixing sleeve are coaxially arranged, a driving piece which drives the rotating ring to rotate is arranged on the pulling seat, and the rotating ring is uniformly and annularly distributed with a clamping piece which is used for clamping the front end of the extension pipe group. The clamping piece clamps the extension pipe group, and the pulling seat pulls the extension pipe group and the processed steel pipe to pass through each die, so that the multiple pulling of the processed steel pipe is completed.

Furthermore, preceding supporting component and back supporting component sliding connection base, the base sets up the drive preceding supporting component and back supporting component horizontal migration's driving piece. The front supporting assembly and the rear supporting assembly are located between the rotating ring and the outer mold fixing sleeve. After the front end of the processed steel pipe passes through each die, the front support assembly supports the front end of the processed steel pipe and moves along with the front end of the processed steel pipe in the drawing process of the drawing seat. After the rear end of the processed steel pipe passes through each die, the rear supporting assembly supports the rear end of the processed steel pipe and moves along with the rear end of the processed steel pipe in the drawing process of the drawing seat.

The front support assembly and the rear support assembly are identical in structure, and the front support assembly comprises a sliding plate, a plurality of support rods and an outer positioning rod. The upper end of sliding plate sets up the vertical bracing piece of axis, the bracing piece includes lift cylinder and the globular ball that is located the lift cylinder top, and on being taken on the bracing piece by the processing steel pipe, the bracing piece can carry out length adjustment according to the appearance of being processed the steel pipe, carries out the support of board parcel formula to the lower surface that supports being processed the steel pipe, supports more firmly, and globular ball is favorable to being processed the rotation of steel pipe.

Furthermore, the cutting tool is horizontally connected with the tool sliding frame in a sliding mode, the tool sliding frame is provided with a driving piece for driving the cutting tool to horizontally move, and the cutting tool is located in front of the outer die fixing sleeve. The cutting tool is used for cutting the extension pipe group and the steel pipe to be processed so as to separate the extension pipe group and the steel pipe to be processed.

When the steel pipe to be processed is pulled out and finishes, the steel pipe to be processed is supported by preceding supporting component and back supporting component, and cutting tool removes to extend the nest of tubes and is cut by the position between the steel pipe to be processed, and rotatory ring drives and extends the nest of tubes and is rotated by the steel pipe to be processed, accomplishes the holistic cutting of steel pipe to be processed.

Further, outer locating lever is located the both sides of bracing piece, outer locating lever includes lower beam, upper boom, solid fixed ring and depression bar, upper boom and lower beam sliding connection, the top of upper boom passes through hinged joint with the lower extreme of depression bar. When the support rod supports the processed steel pipe, the upper rod slides relative to the lower rod, the hinge center position of the upper rod is higher than the central axis of the processed steel pipe, the two pressure rods rotate inwards, pressure is applied to two sides of the processed steel pipe, and the processed steel pipe does not jump out in the rotating process.

Further, upper boom, lower beam and solid fixed ring cavity set up, the lower extreme and the lower beam intercommunication of upper boom, the upper boom is the normal close state through communicating pipe and solid fixed ring intercommunication, communicating pipe, and upper boom, lower beam and solid fixed ring are inside to be equipped with hydraulic oil. The center of the fixed ring is coaxial with the rotation center of the hinge, a fixed sealing block and a moving block are arranged in the fixed ring, a liquid inlet of the fixed ring is arranged between one side of the fixed sealing block and the moving block, and a pressure spring is arranged between the other side of the fixed sealing block and the moving block; the movable block is connected with the compression bar and the sealing swivel. When oil enters the fixing ring from the liquid inlet of the fixing ring, the oil can push the moving block to move, the pressure applying spring is compressed, the moving block drives the sealing rotating ring to rotate on the fixing ring, the moving block simultaneously drives the pressure rod to rotate inwards, and the pressure rod applies pressure to the processed steel pipe.

Furthermore, the side of the upper rod is provided with a limiting rod parallel to the axis of the upper rod, the top surface of the upper rod is provided with a limiting cylinder, a piston and a return spring are arranged inside the limiting cylinder, the return spring is arranged between one side of the piston and the inside of the limiting cylinder, a pressure applying space is formed between the other side of the piston and the inner wall of the limiting cylinder, the piston is provided with a limiting sliding groove, the limiting rod penetrates through the limiting cylinder and penetrates through the limiting sliding groove, a tooth part is arranged on one side of the limiting rod, and a limiting tooth part corresponding to the tooth part shape of the limiting rod is arranged on the inner wall of one side of the limiting sliding groove. The bottom of lower beam sets up the feed liquor pipe, the feed liquor pipe is through forcing pipe and the space intercommunication that pressurizes, the space of impressing is through pressure release pipe and solid fixed ring intercommunication, all set up the check valve on forcing pipe and the pressure release pipe, the check valve on the forcing pipe lets fluid get into the space of impressing, and the check valve on the pressure release pipe lets fluid go out from the space of impressing, and the check valve of pressure release pipe is normally closed state.

Hydraulic oil enters the lower rod and the pressurizing pipe from a liquid inlet pipe at the bottom of the lower rod, a limiting tooth part on one side of a limiting sliding groove is clamped on a tooth part of the limiting rod due to the existence of a return spring, the limiting cylinder locks the relative position of the lower rod and the upper rod at the moment, the hydraulic oil enters a pressure applying space of the limiting cylinder and pushes a piston due to large oil inside the lower rod and the upper rod, the return spring is compressed, the limiting tooth part on one side of the limiting sliding groove on the piston leaves, the tooth part of the limiting rod unlocks the relative position of the lower rod and the upper rod at the moment, the upper rod moves upwards relative to the lower rod, when the hinge center position of the upper rod is higher than the central axis of a processed steel pipe, a one-way valve and a communicating pipe of the pressure relief pipe are opened, the oil in the pressure applying space enters a fixing ring from the pressure relief pipe, and the hydraulic oil enters the fixing ring through the lower rod and the upper rod due to the fact that the starting pressure of the one-way valve on the pressurizing pipe is smaller than the starting pressure of the lower rod, the fluid can promote the removal piece and remove, realizes the depression bar and inwards rotates, will be processed the steel pipe when the depression bar and compress tightly, and communicating pipe is closed, and the feed liquor pipe of lower beam is closed.

Preferably, the inner side of the pressure lever is provided with a ball, which is beneficial to the rotation of the processed steel pipe.

Preferably, the base is provided with a sliding support sleeve for supporting the steel pipe to be processed, and rollers are arranged in the sliding support sleeve to assist in feeding of the steel pipe to be processed.

Preferably, the electromagnetic assembly used for enabling the inner module to float inside the outer die sleeve is arranged inside the outer die fixing sleeve, when the processed steel pipe is pulled out, the processed steel pipe leaves the outer die sleeve and the inner module, and the inner module can drop under the action of gravity, so that the electromagnetic assembly can generate a magnetic field, the inner module is suspended inside the outer die sleeve, and the electromagnetic assembly is convenient for workers to take down.

The invention has the beneficial effects that:

1. the method and the device for drawing the special-shaped steel have the advantages that the processed steel pipe in the drawing device can pass through a plurality of dies through one-time drawing, multiple drawing and shaping are realized, the drawing efficiency is high, in the drawing process, the steel pipe is heated in the first drawing process, the smooth proceeding of the following drawing process can be assisted, and a good gain is formed.

2. The processed steel pipe in the special-shaped steel drawing device can be separated from the extension pipe group by cutting after being drawn, a target processed steel pipe is directly obtained, integral processing from the processed steel pipe to the target steel pipe is formed, and the processing efficiency is high.

Drawings

FIG. 1 is a drawing step diagram of the drawing method of the special-shaped steel;

FIG. 2 is a schematic structural view of the welded structure of the processed steel pipe and the extension pipe group in the method for drawing the special-shaped steel;

FIG. 3 is a schematic structural diagram of the special-shaped steel drawing square device;

FIG. 4 is a schematic structural view of the outer mold fixing sleeve of the special-shaped steel drawing device;

FIG. 5 is a schematic structural view of the drawing base of the special-shaped steel drawing device;

FIG. 6 is a schematic structural view of a front support assembly of the special-shaped steel squaring device;

FIG. 7 is a schematic structural view of the front support assembly of the special-shaped steel squaring device during supporting;

FIG. 8 is a schematic structural view of the fixing ring of the special-shaped steel squaring device;

FIG. 9 is a schematic structural view of the outer positioning rod of the special-shaped steel drawing device;

FIG. 10 is a schematic structural view of the special-shaped steel drawing device at the position A of the outer positioning rod;

FIG. 11 is a top view of the special-shaped steel squaring device at the position of a limiting cylinder;

fig. 12 is a schematic structural view of the special-shaped steel drawing square device after drawing.

In the figure: 1. a processed steel pipe; 2. an extension tube set; 3. an inner module; 4. an outer die sleeve; 5. an outer mold fixing sleeve; 6. a top support; 7. cutting a cutter; 8. pulling the base; 9. a front support assembly; 10. a rear support assembly; 11. a sliding support sleeve; 51. a cylinder; 52. a limiting block; 53. a lifting rod; 61. a die sleeve sliding frame; 62. a tool carriage; 81. a rotating ring; 82. a clamping member; 91. a sliding plate; 92. a support bar; 93. an outer positioning rod; 931. a lower rod; 932. a rod is arranged; 933. a fixing ring; 934. a pressure lever; 935. a communicating pipe; 936. a limiting rod; 937. a pressurizing pipe; 938. a limiting cylinder; 939. a pressure relief pipe; 9331. sealing the swivel; 9332. fixing the sealing block; 9333. a moving block; 9334. a pressure applying spring; 9381. a piston; 9382. a return spring; 9383. limiting tooth part.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1

Referring to fig. 1, a method for drawing a special-shaped steel comprises the following steps:

step three: referring to fig. 2, the extension pipe is welded to the front end of the pipe blank in sequence from small to small according to the pipe diameter, and the inner mold block and the outer mold sleeve corresponding to the extension pipe are attached to the extension pipe and move;

By the drawing method, the processed steel pipe can be drawn and shaped for many times through a plurality of dies by one-time drawing, the drawing efficiency is high, and in the drawing process, because the steel pipe is heated in the first drawing process, the smooth proceeding of the following drawing process can be assisted, and a good gain is formed.

Example 2

In this embodiment, based on the drawing method and drawing device for the special-shaped steel in embodiment 1, referring to fig. 3, the drawing device includes a base, a top bracket 6, an outer mold fixing sleeve 5, a cutting tool 7, a drawing base 8, a front support assembly 9 and a rear support assembly 10 for supporting the steel pipe to be processed.

Specifically, a top support 6 is arranged above the base, and a die sleeve sliding frame 61 and a cutter sliding frame 62 are arranged on the top support 6. The fixed cover 5 of external mold is connected through lifter 53 to the sliding part lower extreme of die sleeve carriage 61, and the fixed cover 5 of external mold is used for fixed external mold 4, the fixed cover 5 of external mold is connected with the horizontal sliding of die sleeve carriage 61, and cutter die sleeve carriage 61 sets up the driving piece that drives the fixed cover 5 horizontal migration of external mold, and the position of the fixed cover 5 of external mold can remove to the interval between the external mold 4 in the adaptation extension nest of tubes 2.

Referring to fig. 4, an air cylinder 51 is arranged on the inner edge of the outer die fixing sleeve 5, the axis of the air cylinder 51 passes through the central axis of the outer die fixing sleeve 5 and is perpendicular to the central axis of the outer die fixing sleeve 5, and the working end of the air cylinder 51 is fixedly connected with a limiting block 52 corresponding to a limiting hole outside the outer die sleeve 4. When the outer die sleeve 4 is positioned in the outer die fixing sleeve 5, the limiting hole outside the outer die sleeve 4 is aligned with the limiting block 52, and the air cylinder 51 pushes the limiting block 52 to enter the limiting hole of the outer die sleeve 4 for positioning the outer die sleeve 4.

Further, pull out and draw seat 8 sliding connection on the base, the base sets up the driving piece that the drive pulled out and draw 8 horizontal migration. Referring to fig. 5, the pulling seat 8 is provided with a rotating ring 81 rotatably connected to the pulling seat 8, the rotating ring 81 is coaxially arranged with the outer mold fixing sleeve 5, the pulling seat 8 is provided with a driving member for driving the rotating ring 81 to rotate, and the rotating ring 81 is uniformly distributed with clamping members 82 for clamping the front end of the extension pipe set 2. The clamping member 82 clamps the extension pipe group 2, and the drawing base 8 draws the extension pipe group 2 and the steel pipe 1 to be processed through the respective dies, thereby completing the drawing of the steel pipe 1 to be processed for a plurality of times.

Furthermore, the front supporting component 9 and the rear supporting component 10 are slidably connected with the base, and the base is provided with a driving piece for driving the front supporting component 9 and the rear supporting component 10 to horizontally move. The front support assembly 9 and the rear support assembly 10 are positioned between the rotating ring 81 and the outer mold fixing sleeve 5. After the front end of the processed steel pipe 1 passes through each die, the front support assembly 9 supports the front end of the processed steel pipe 1 and moves along with the front end of the processed steel pipe 1 in the drawing process of the drawing seat 8. After the rear end of the processed steel pipe 1 passes through each die, the rear support assembly 10 supports the rear end of the processed steel pipe 1 and moves along with the rear end of the processed steel pipe 1 during the drawing process of the drawing base 8.

The front support assembly 9 is identical in structure to the rear support assembly 10, and referring to fig. 6, the front support assembly 9 includes a sliding plate 91, a plurality of support rods 92, and outer positioning rods 93. The upper end of the sliding plate 91 is provided with a supporting rod 92 with a vertical axis, the supporting rod 92 comprises a lifting oil cylinder and a spherical ball positioned at the top of the lifting oil cylinder, when the processed steel pipe 1 is placed on the supporting rod 92, the supporting rod 92 can adjust the length according to the appearance of the processed steel pipe 1, plate-wrapped support is carried out on the lower surface of the processed steel pipe 1, the support is more stable, and the spherical ball is favorable for rotation of the processed steel pipe 1.

Further, the cutting tool 7 is horizontally slidably connected with a tool carriage 62, the tool carriage 62 is provided with a driving member for driving the cutting tool 7 to horizontally move, and the cutting tool 7 is located in front of the outer mold fixing sleeve 5. The cutting tool 7 is used to cut the extension pipe group 2 and the steel pipe 1 to be processed, and separate the extension pipe group 2 and the steel pipe 1 to be processed.

When the steel pipe 1 to be processed is pulled out, the steel pipe 1 to be processed is supported by the front support assembly 9 and the rear support assembly 10, the cutting tool 7 moves to a position between the extension pipe group 2 and the steel pipe 1 to be processed for cutting, and the rotating ring 81 drives the extension pipe group 2 and the steel pipe 1 to be processed to rotate, so that the whole cutting of the steel pipe 1 to be processed is completed.

Further, the outer positioning rod 93 is located on two sides of the supporting rod 92, the outer positioning rod 93 includes a lower rod 931, an upper rod 932, a fixing ring 933 and a pressing rod 934, the upper rod 932 is slidably connected with the lower rod 931, and the top of the upper rod 932 is connected with the lower end of the pressing rod 934 through a hinge. Referring to fig. 7, when the support rod 92 supports the steel pipe 1 to be machined, the upper rod 932 slides relative to the lower rod 931, so that the hinge center position of the upper rod 932 is higher than the central axis of the steel pipe 1 to be machined, the two pressure rods 934 rotate inwards, and pressure is applied to two sides of the steel pipe 1 to be machined, so that the steel pipe 1 to be machined does not jump out in the rotating process.

Further, referring to fig. 8 and 9, the upper rod 932, the lower rod 931 and the fixing ring 933 are hollow, the lower end of the upper rod 932 is communicated with the lower rod 931, the upper rod 932 is communicated with the fixing ring 933 through a communicating pipe 935, the communicating pipe 935 is in a normally closed state, and hydraulic oil is filled in the upper rod 932, the lower rod 931 and the fixing ring 933. The center of the fixed ring 933 is coaxial with the rotation center of the hinge, a fixed sealing block 9332 and a moving block 9333 are arranged in the fixed ring 933, a liquid inlet of the fixed ring 933 is arranged between one side of the fixed sealing block 9332 and the moving block 9333, and a pressure spring 9334 is arranged between the other side of the fixed sealing block 9332 and the moving block 9333; the fixed ring 933 is provided with a sealing rotary ring 9331, the sealing rotary ring 9331 is in rotary sealing connection with the fixed ring 933, and the moving block 9333 is connected with a pressing rod 934 and the sealing rotary ring 9331. When oil enters the fixed ring 933 from the liquid inlet of the fixed ring 933, the oil can push the moving block 9333 to move, the pressure spring 9334 is compressed, the moving block 9333 drives the sealing rotating ring 9331 to rotate on the fixed ring 933, the moving block 9333 simultaneously drives the pressure rod 934 to rotate inwards, and the pressure rod 934 applies pressure to the processed steel pipe 1.

Furthermore, a limiting rod 936 parallel to the axis of the upper rod 932 is disposed on the side surface of the upper rod 932, a limiting cylinder 938 is disposed on the top surface of the upper rod 932, referring to fig. 10 and 11, a piston 9381 and a return spring 9382 are disposed inside the limiting cylinder 938, a return spring 9382 is disposed between one side of the piston 9381 and the inside of the limiting cylinder 938, a pressure applying space is disposed between the other side of the piston 9381 and the inner wall of the limiting cylinder 938, a limiting sliding groove 9384 is disposed on the piston 9381, the limiting rod 936 penetrates through the limiting cylinder 938 and penetrates through the limiting sliding groove 9384, a tooth portion is disposed on one side of the limiting rod 936, and a limiting tooth portion 9383 corresponding to the tooth portion shape of the limiting rod 936 is disposed on the inner wall of one side of the limiting sliding groove 9384. The bottom of lower pole 931 sets up the feed liquor pipe, the feed liquor pipe is through forcing pipe 937 and the space intercommunication of exerting pressure, the space of exerting pressure is through pressure release pipe 939 and solid fixed ring 933 intercommunication, all set up the check valve on forcing pipe 937 and the pressure release pipe 939, the check valve on forcing pipe 937 lets fluid get into the space of exerting pressure, and the check valve on the pressure release pipe 939 lets fluid go out from the space of exerting pressure, and the check valve of pressure release pipe 939 is normally closed state.

Hydraulic oil enters the lower rod 931 and the pressurizing pipe 937 from the liquid inlet pipe at the bottom of the lower rod 931 and is locked in the relative position of the lower rod 931 and the upper rod 932 by the return spring 9382, the limit tooth 9383 on the side of the limit chute 9384 is engaged with the tooth of the limit rod 936, the limit cylinder 938 locks the relative position of the lower rod 931 and the upper rod 932, the hydraulic oil enters the pressure space of the limit cylinder 938 and pushes the piston 9381 due to the large oil inside the lower rod 931 and the upper rod 932, the return spring 9382 is compressed, the limit tooth 9383 on the side of the piston upper limit chute 9384 is disengaged, the tooth of the limit rod 936 is unlocked, the relative position of the lower rod 931 and the upper rod 932 is unlocked, the upper rod 932 moves upward relative to the lower rod 931, when the hinge center position of the upper rod 932 is higher than the center axis of the processed steel pipe 1, the check valve and the communicating pipe 935 of the pressure relief pipe 939 are opened, the oil in the pressure space enters the fixing ring 933 from the pressure relief pipe 939, the starting pressure of the communicating pipe 935 is smaller than the starting pressure of the check valve on the pressurizing pipe 937, hydraulic oil gets into solid fixed ring 933 through lower arm 931 and upper arm 932, and fluid can promote movable block 9333 and remove, realizes depression bar 934 and toward internal rotation, will be compressed tightly by processing steel pipe 1 when depression bar 934, and communicating pipe 935 closes, and the feed liquor pipe of lower arm 931 is closed.

In this embodiment, the inboard of depression bar 934 sets up the ball, is favorable to being processed the rotation of steel pipe 1.

In this embodiment, the base is provided with a sliding support sleeve 11 for supporting the steel pipe 1 to be processed, and rollers are arranged inside the sliding support sleeve 11 to assist in feeding the steel pipe 1 to be processed.

In this embodiment, the inside electromagnetic assembly that is used for making interior module 3 float in interior of outer die sleeve 4 that sets up of outer die fixing sleeve 5, is pulled out when finishing by processing steel pipe 1, is processed steel pipe 1 and leaves outer die sleeve 4 and interior module 3, because module 3 can drop in the action of gravity, above-mentioned electromagnetic assembly can produce magnetic field, makes interior module 3 suspend in outside die sleeve 4 inside, makes things convenient for the staff detachable.

The working process of the special-shaped steel drawing device in the embodiment is as follows:

and welding the extension pipe group 2 and the processed steel pipe 1 to obtain the integral mounting piece.

And secondly, the outer die sleeves 4 in the extension pipe group 2 are respectively arranged on the outer die fixing sleeves 5 of the device, the outer die sleeves 4 are positioned by the limiting blocks 52 in the outer die fixing sleeves 5, and the processed steel pipe 1 is supported by the sliding support sleeve 11.

The three-drawing seat 8 draws the extension pipe group 2 and the processed steel pipe 1 through each die to finish the drawing of the processed steel pipe 1 for multiple times;

in the drawing process, after the front end of the processed steel pipe 1 passes through each die, the front support assembly 9 supports the front end of the processed steel pipe 1, and when the processed steel pipe 1 is placed on the support rod 92, the support rod 92 can adjust the length according to the shape of the processed steel pipe 1, so as to support the lower surface of the processed steel pipe 1 in a plate wrapping manner. The front support assembly 9 moves along with the front end of the steel pipe 1 in the drawing process of the drawing seat 8;

after the rear end of the processed steel pipe 1 passes through each die, the rear support assembly 10 supports the rear end of the processed steel pipe 1 and moves along with the rear end of the processed steel pipe 1 in the drawing process of the drawing seat 8; when the steel pipe 1 to be processed is pulled out, the electromagnetic assembly in the outer die fixing sleeve 5 can generate a magnetic field, so that the inner module 3 is suspended in the outer die sleeve 4, and can be conveniently taken down by a worker;

after the drawing is finished, referring to fig. 12, the cutting tool 7 moves to the connection position between the extension pipe group 2 and the steel pipe 1 to be processed and cuts the connection position, so as to cut the extension pipe group 2 and the steel pipe 1 to be processed, and in the process, the rotating ring 81 drives the extension pipe group 2 and the steel pipe 1 to be processed to rotate, so as to complete the cutting of the whole steel pipe 1 to be processed;

during cutting, the upper rod 932 slides relative to the lower rod 931, so that the hinge center position of the upper rod 932 is higher than the central axis of the steel pipe 1 to be processed, the two pressing rods 934 rotate inwards, pressure is applied to two sides of the steel pipe 1 to be processed, and the steel pipe 1 to be processed does not jump out in the rotating process.

And after the five cutting operations are finished, a processed target steel pipe is obtained, and the outer positioning rod 93 loosens the limit of the target steel pipe. The support rods 92 on one sides of the front support assembly 9 and the rear support assembly 10 are shortened, and the target steel pipe can roll down to the processing position of the next process; alternatively, the steel pipe is directly grasped to the next process machining position.

In the special-shaped steel drawing device in this embodiment, the steel pipe to be processed is drawn once, can pass through a plurality of moulds, realizes drawing the plastic many times, and drawing efficiency is high, and the steel pipe to be processed can be separated with the extension nest of tubes through the cutting after drawing, directly obtains the steel pipe to be processed of target, forms the integral processing of steel pipe to be processed to the steel pipe of target, and machining efficiency is high.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A special-shaped steel drawing method is characterized by comprising the following steps:

the method comprises the following steps: preparing a plurality of special-shaped steel extension pipes with different diameter specifications, wherein the maximum pipe diameter of each extension pipe is the size of a target special-shaped steel pipe; preparing an inner die block and an outer die sleeve which correspond to the size of the extension pipe;

step three: welding the extension pipe to the front end of the pipe blank in sequence from small to small according to the pipe diameter, and sleeving an inner module and an outer die corresponding to the extension pipe on the extension pipe;

2. The drawing device based on the drawing method of the deformed steel bar according to claim 1 is characterized by comprising a base, a top support (6), an outer mold fixing sleeve (5), a cutting tool (7), a drawing seat (8) and a front support assembly (9) and a rear support assembly (10) for supporting the steel pipe to be processed, wherein the top support (6) is provided with a mold sleeve sliding frame (61) and a tool sliding frame (62), the outer mold fixing sleeve (5) is horizontally and slidably connected with the mold sleeve sliding frame (61), the cutting tool (7) is horizontally and slidably connected with the tool sliding frame (62), and the cutting tool (7) is positioned in front of the outer mold fixing sleeve (5);

an air cylinder (51) is arranged on the inner edge of the outer die fixing sleeve (5), the axis of the air cylinder (51) passes through the central axis of the outer die fixing sleeve (5) and is perpendicular to the central axis of the outer die fixing sleeve (5), and the working end of the air cylinder (51) is fixedly connected with a limiting block (52) corresponding to a limiting hole outside the outer die sleeve (4);

the pulling seat (8) is provided with a rotating ring (81) which is rotationally connected with the pulling seat (8), and clamping pieces (82) which are used for clamping the front end of the extension pipe group (2) are uniformly distributed on the rotating ring (81);

the rotating ring (81) and the outer mold fixing sleeve (5) are coaxially arranged, and the front supporting assembly (9) and the rear supporting assembly (10) are located between the rotating ring (81) and the outer mold fixing sleeve (5).

3. The pulling device according to claim 2, wherein the front support assembly (9) comprises a sliding plate (91), a support rod (92) and an outer positioning rod (93), the upper end of the sliding plate (91) is provided with the support rod (92) with a vertical axis, the support rod (92) comprises a lifting cylinder and a spherical ball positioned at the top of the lifting cylinder, the outer positioning rod (93) is positioned at two sides of the support rod (92), the outer positioning rod (93) comprises a lower rod (931), an upper rod (932), a fixing ring (933) and a pressure rod (934), the upper rod (932) is connected with the lower rod (931) in a sliding manner, and the top of the upper rod (932) is connected with the lower end of the pressure rod (934) through a hinge.

4. A pulling device according to claim 3, wherein the upper rod (932), the lower rod (931) and the fixing ring (933) are hollow, and the upper rod (932) communicates with the lower rod (931) and the fixing ring (933), respectively;

the circle center of the fixed ring (933) is coaxial with the rotation center of the hinge, a fixed sealing block (9332) and a moving block (9333) are arranged in the fixed ring (933), a liquid inlet of the fixed ring (933) is arranged between one side of the fixed sealing block (9332) and the moving block (9333), and a pressure spring (9334) is arranged between the other side of the fixed sealing block (9332) and the moving block (9333); the fixed ring (933) is provided with a sealing rotating ring (9331), the sealing rotating ring (9331) is in rotary sealing connection with the fixed ring (933), and the moving block (9333) is connected with a pressure rod (934) and the sealing rotating ring (9331);

a limiting rod (936) parallel to the axis of the upper rod (932) is arranged on the side surface of the upper rod (932), a limiting cylinder (938) is arranged on the top surface of the upper rod (932), a piston (9381) and a return spring (9382) are arranged inside the limiting cylinder (938), the return spring (9382) is arranged between one side of the piston (9381) and the inside of the limiting cylinder (938), a pressure applying space is formed between the other side of the piston (9381) and the inner wall of the limiting cylinder (938), a limiting sliding chute (9384) is arranged on the piston (9381), the limiting rod (936) penetrates through the limiting cylinder (938) and penetrates through the limiting sliding chute (9384), a tooth part is arranged on one side of the limiting rod (936), and a limiting tooth part (9383) corresponding to the tooth part shape of the limiting rod (936) is arranged on the inner wall of one side of the limiting sliding chute (84);

the bottom of lower beam (931) sets up the feed liquor pipe, the feed liquor pipe is through forcing pipe (937) and the space intercommunication of exerting pressure, the space of exerting pressure is through pressure release pipe (939) and solid fixed ring (933) intercommunication, all set up the check valve on forcing pipe (937) and pressure release pipe (939).

5. Drawing device according to claim 4, characterized in that the base is provided with a sliding support sleeve (11) for supporting the steel tube being processed.

6. Drawing device as in claim 2, characterized in that inside said external die holding sleeve (5) there are provided electromagnetic assemblies for floating the internal die block (3) inside the external die holding sleeve (4).