CN209189509U - A kind of shape tube drawbench - Google Patents
A kind of shape tube drawbench Download PDFInfo
- Publication number
- CN209189509U CN209189509U CN201821871659.4U CN201821871659U CN209189509U CN 209189509 U CN209189509 U CN 209189509U CN 201821871659 U CN201821871659 U CN 201821871659U CN 209189509 U CN209189509 U CN 209189509U
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- wedge
- fixture block
- steel pipe
- shaped fixture
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Abstract
The utility model belongs to the technical field of steel pipe drawing, it is related to a kind of shape tube drawbench, it includes operating platform, the drawing mechanism and cutting mechanism being set on operating platform, drawing mechanism includes the sliding rail being fixedly connected on operating platform, it is slidably connected on sliding rail for pulling the draw trolley of steel pipe, the hydraulic cylinder for pulling draw trolley is fixedly connected on draw trolley, draw trolley internal slide is connected with the dynamic device of folder, pressing from both sides dynamic device includes two wedge-shaped fixture blocks, wedge-shaped fixture block is bonded sliding with the bottom wall of draw trolley, opening is equipped with the crushing block that sliding is bonded with the inclined-plane of wedge-shaped fixture block, U-shaped connection frame is fixedly connected between wedge-shaped fixture block, the draft cylinder for pushing wedge-shaped fixture block mobile is fixedly connected on connection frame；The utility model has steel pipe drawing process is mobile to stablize, and guarantees that surface keeps smooth to steel pipe during the drawing process, guarantees the effect that quality is straightened of steel pipe.
Description
Technical field
The utility model relates to the technical fields of steel pipe drawing, more particularly, to a kind of shape tube drawbench.
Background technique
Drawbench is the equipment for carrying out drawing to metal material, changes the size and shape of metal material by drawing
Become, to reach required profile requirement.
As depicted in figs. 1 and 2, the usual operating platform 1 of conventional drawbench is arranged on platform and is fixedly connected with mould table 2,
It is arranged with the mold 3 passed through for steel pipe in mould table 2, is additionally provided on operating platform 1 for shearing steel pipe and stretching steel pipe
Cutting mechanism 4 and drawing mechanism 5, cutting mechanism 4 are located at the side of mould table 2, and cutting mechanism 4 is located at the lower section of mould table 2, cuts
Cutting mechanism 4 includes installs case 41, is fixedly connected with two one slide rails 1, the side of installs case 41 along the vertical direction on operating platform 1
Several sliding blocks one are fixedly connected on wall, one sliding sleeve of sliding block is set on sliding rail 1, and the bottom end of installs case 41 is fixedly connected with
Pusher cylinder 1 is fixedly connected with pusher cylinder 28 on the inner wall of installs case 41, and pusher cylinder 28 is along perpendicular to pusher cylinder
One 7 direction is horizontally disposed.It is provided with steel pipe in installs case 41 and cuts 6, steel pipe cuts 6 branch far from pusher cylinder 28 and cuts fixed company
It is connected on the side wall of installs case 41, the output shaft of pusher cylinder 28 is fixedly connected on the branch that steel pipe cuts 6 close to pusher cylinder 28
Cut end.Drawing mechanism 5 is the chain 51 that the sprocket wheel 52 for being rotationally connected with operating platform 1 and sprocket wheel 52 are rotatably assorted, chain 51
One section of side wall for being fixedly connected on installs case 41, drive steel pipe to stretch using the cooperation of chain 9 and sprocket wheel 10, then by pushing
Cylinder 1, pusher cylinder 28 drive steel pipe to cut 6 movements and cut steel pipe, fall into steel pipe in hopper 29.
But chain has protrusion between the chain link and chain link in chain, leads to entire chain due to the limitation of self structure
Item will appear the phenomenon that jump section while stretching transmission, so as to cause the rough out-of-flatness of steel tube surface drawing, to influence
Quality is straightened in steel pipe.
Utility model content
The purpose of the utility model is to provide a kind of shape tube drawbench to protect with the mobile stabilization of steel pipe drawing process
Demonstrate,proving steel pipe, surface keeps smooth during the drawing process, guarantees the effect that quality is straightened of steel pipe.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of shape tube drawbench, including operating platform, the drawing mechanism and cutting mechanism that are set on operating platform, institute
Drawing mechanism is stated to include the sliding rail being fixedly connected on operating platform, be slidably connected on sliding rail for pulling the drawing of steel pipe small
Vehicle, the sliding rail are arranged along the length direction of operating platform, are fixedly connected on the draw trolley for pulling draw trolley
Hydraulic cylinder, the draw trolley offers opening close to mould table side, and it is dynamic that the draw trolley internal slide is connected with folder
Device, the dynamic device of folder include two wedge-shaped fixture blocks, and the wedge shape fixture block is bonded sliding with the bottom wall of draw trolley, described to open
It is equipped with the crushing block for being bonded sliding with the inclined-plane of wedge-shaped fixture block at mouthful, is fixedly connected with U-shaped connection frame between the wedge shape fixture block,
The draft cylinder for pushing wedge-shaped fixture block mobile is fixedly connected on the connection frame.
By using above-mentioned technical proposal, starting hydraulic cylinder makes hydraulic cylinder drive draw trolley on the slide rail in the horizontal direction
It is mobile, when draw trolley is moved at mould table, using the promotion of draft cylinder, move wedge-shaped fixture block in the horizontal direction,
Wedge-shaped fixture block is in moving process, and the inclined-plane of wedge-shaped fixture block and the inclined-plane of crushing block are squeezed and contradicted, to change two wedge grips
The distance between block, it is dynamic clamping to steel pipe progress using the folder of two wedge-shaped fixture blocks, it completes under the promotion of hydraulic cylinder to steel pipe
Pulling.Hydraulic cylinder has evaded the influence of chain link compared to chain, makes steel pipe held stationary during being pulled, and output is flat
Surely, to guarantee that surface keeps smooth to steel pipe during the drawing process, guarantees the effect that quality is straightened of steel pipe.
The utility model is further arranged to: rotation is embedded with cunning on the side wall that the wedge shape fixture block is bonded with draw trolley
Wheel, the pulley are bonded conflict with the inner wall of draw trolley.
By using above-mentioned technical proposal, the setting of pulley can reduce the friction between wedge-shaped fixture block and draw trolley
Power slides wedge-shaped fixture block in the process of moving more freely laborsaving.
The utility model is further arranged to: the draw trolley is bonded on the side wall contradicted with pulley and offers and pulley
Cooperate the limiting slot of sliding, the limiting slot is along the length direction setting for being parallel to sliding rail.
By using above-mentioned technical proposal, the setting of sliding slot can play position-limiting action to pulley, prevent wedge-shaped fixture block from existing
Positional shift occurs during sliding
The utility model is further arranged to: the wedge shape fixture block offers on the side wall on its inclined-plane for pressing from both sides steel
The clip slot of pipe, the clip slot is along the length direction setting for being parallel to sliding rail, the cross section semicircular in shape setting of the clip slot
By using above-mentioned technical proposal, when wedge-shaped fixture block carries out clamping to steel pipe, steel pipe strap is together in groove, groove
The structure for cooperating steel pipe, can make wedge grip block clamping to steel pipe stronger.
The utility model is further arranged to: two sides of the U-shaped connection frame are fixedly connected with tensioning spring.
By using above-mentioned technical proposal, tensioning spring can apply tensile force to U-shaped connection frame, avoid being used for a long time
In the process, there is deformation to influence the normal contraction of U-shaped connection frame in U-shaped connection frame.
The utility model is further arranged to: the inclined-plane of wedge-shaped fixture block is equipped with guide rod, and the guide rod is along wedge grip
The moving direction of block is horizontally disposed, and the inclined-plane of the crushing block is equipped with the guide groove that sliding is matched with guide rod.
By using above-mentioned technical proposal, the matching sliding of guide rod and guide groove can make wedge grip block in moving process
Middle holding is stablized, and prevents wedge block position in moving process from shifting.
The utility model is further arranged to: the guide rod is bonded on the side wall contradicted with guide groove and is embedded with several steel
Pearl, the steel ball are bonded conflict with the bottom wall of guide groove
By using above-mentioned technical proposal, the setting of steel ball can reduce the frictional force between guided way and guide groove, make
Guide rod slides more labor-saving in guide groove.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of shape tube drawbench in conclusion the utility model advantageous effects are as follows:
1, by sliding rail, the setting of hydraulic cylinder, can play makes steel pipe is mobile during the drawing process to stablize, and guarantees that steel pipe exists
Surface is kept smooth in drawing process, guarantees the effect that quality is straightened of steel pipe；
2, it by the setting of groove, can play under the premise of the structure of protection steel pipe is not damaged, it is clamping to steel pipe
It is stronger, and effect.
Detailed description of the invention
Fig. 1 is the overall structure diagram for embodying special-shaped drawbench in background technique；
Fig. 2 is the schematic diagram of enlarged drawing at A in Fig. 1；
Fig. 3 is the overall structure diagram for embodying special-shaped drawbench in embodiment；
Fig. 4 is the schematic diagram for embodying the side view of sliding rail two and slide cartridge in special-shaped drawbench in embodiment；
Fig. 5 is the schematic diagram for embodying special-shaped drawbench upper fastening groove；
Fig. 6 is for embodying the schematic diagram in embodiment for the explosive view of installs case internal structure；
Fig. 7 is the schematic diagram of enlarged drawing at B in Fig. 6.
In figure, 1, operating platform；2, mould table；3, mold；4, cutting mechanism；41, installs case；5, drawing mechanism；51, chain
Wheel；52, chain；53, hydraulic cylinder；6, steel pipe is cut；7, pusher cylinder one；8, pusher cylinder two；11, groove；12, sliding rail one；14,
Sliding rail two；15, slide cartridge；16, draw trolley；18, dynamic device is pressed from both sides；181, wedge-shaped fixture block；19, crushing block；20, U-shaped connection frame；
21, draft cylinder；22, clip slot；23, tensioning spring；24, pulley；25, limiting slot；26, guide rod；27, guide groove；28, steel
Pearl；29, hopper.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Embodiment: being a kind of shape tube drawbench disclosed by the utility model, including operating platform 1, operation referring to Fig. 3
The supporting leg for being used to support operating platform 1 is fixedly connected on platform 1, operating platform 1 is arranged in cuboid, on operating platform 1
Fluted 11 are opened up, groove 11 is arranged and runs through the upper bottom surface of operating platform 1 in rectangle, and groove 11 is located at operating platform 1
Center.Mould table 2 is fixedly connected on operating platform 1, mould table 2 is located at the side of groove 11, blocks in mould table 2 and set
There is the mold 3 passed through for steel pipe.
Referring to Fig. 3, two sliding rails 2 14 are fixedly connected on operating platform 1, sliding rail 2 14 is along the length side of operating platform 1
To horizontally disposed and be located at 11 two sides of groove, the setting cylindrical of sliding rail 2 14, drawing is slidably connected on operating platform 1
Trolley 16 is pulled out, draw trolley 16 is arranged in cuboid, and the bottom end of draw trolley 16 is fixedly connected with 4 slide cartridge 15(reference Fig. 4),
Every two slide cartridge 15 is set as one group, and every group of slide cartridge 15 is slidably connected to a sliding rail 2 14 respectively, and drawing mechanism 5 is to be fixedly connected
In draw trolley 16 backwards to the hydraulic cylinder 17 of 2 side of mould table, hydraulic cylinder 17 is horizontally disposed and is fixedly connected on operation
On platform 1.
Referring to Fig. 3, draw trolley 16 offers opening close to 2 side of mould table, and opening is arranged towards mould table.Drawing is small
16 internal slide of vehicle is connected with the dynamic device 18 of folder, and pressing from both sides dynamic device 18 includes two wedge-shaped fixture blocks 181, and two wedge-shaped fixture blocks 181 are right
Claim setting, and two inclined-planes of wedge-shaped fixture block 181 are located at the left and right sides of installs case 41, the bottom surface of wedge-shaped fixture block 181 with
The bottom wall of draw trolley 16 is bonded sliding, and the two sides of opening have been respectively fixedly connected with crushing block 19, and crushing block 19 is at right angles terraced
Shape setting, side wall of the crushing block 19 backwards to its inclined-plane are bonded fixation with the sidewall bodies of installs case 41, wherein wedge-shaped fixture block 181 leans on
Its sidewall area far from mould table 2 that the sidewall area of nearly mould table 2 is greater than.The inclined-plane of crushing block 19 and wedge-shaped fixture block 181
Inclined-plane be bonded sliding.Two pieces of wedge-shaped fixture blocks 181 are fixedly connected with U-shaped connection frame 20, U on the side wall that installs case 41 is open
Type connection frame 20 is fixedly connected with the stretching for pushing the mobile mld of wedge-shaped fixture block 181 on the side wall that installs case 41 is open
Cylinder 21, draft cylinder 21 are fixedly connected on the bottom surface of installs case 41.
Starting hydraulic cylinder 17 makes hydraulic cylinder 17 that draw trolley 16 be driven to move in the horizontal direction on the slide rail, works as draw trolley
16 when being moved at mould table, using the promotion of draft cylinder 21, moves wedge-shaped fixture block 181 in the horizontal direction, wedge-shaped fixture block
181 in moving process, and the inclined-plane of wedge-shaped fixture block 181 and the inclined-plane of crushing block 19 are squeezed and contradicted, to change two wedge grips
The distance between block 181, it is dynamic clamping to steel pipe progress using the folder of two wedge-shaped fixture blocks 181, it is complete under the promotion of hydraulic cylinder 17
The pulling of pairs of steel pipe.Hydraulic cylinder 17 has evaded the influence of chain link compared to chain 9, and steel pipe is made to keep flat during being pulled
Surely, output is steady, to guarantee that surface keeps smooth to steel pipe during the drawing process, guarantees the effect that quality is straightened of steel pipe.
Referring to Fig. 5, wedge-shaped fixture block 181 offers the clip slot 22 for pressing from both sides steel pipe, clip slot on the side wall on its inclined-plane
22 along the length direction setting for being parallel to sliding rail, the cross section semicircular in shape setting of clip slot 22.When wedge-shaped fixture block 181 to steel pipe into
When row is clamping, for steel pipe strap together in clip slot 22, clip slot 22 cooperates the structure of steel pipe, and wedge grip block 181 can be made clamping to steel pipe
It is stronger.
Referring to Fig. 6, two sides of U-shaped connection frame 20 are fixedly connected with tensioning spring 23.Tensioning spring 23 can be given U-shaped
Connection frame 20 applies tensile force, avoids in the long-term use, and U-shaped connection frame 20 deformation occurs to influence U-shaped connection frame
20 normal contraction.
Referring to figure 6 and figure 7, there are four rotation is embedded on the side wall that each wedge-shaped fixture block 181 is bonded with draw trolley 16
Pulley 24, pulley 24 are distributed on the inclined-plane of wedge-shaped fixture block 181, and pulley 24 is bonded conflict, drawing with the inner wall of draw trolley 16
Trolley 16 is bonded the limiting slot 25 offered on the side wall contradicted with the cooperation sliding of pulley 24 with pulley 24, and limiting slot 25 is along parallel
It is arranged in the length direction of sliding rail.The setting of pulley 24 can reduce the frictional force between wedge-shaped fixture block 181 and draw trolley 16,
Slide wedge-shaped fixture block 181 in the process of moving more freely laborsaving.The setting of sliding slot can play position-limiting action to pulley 24,
Prevent wedge-shaped fixture block 181 from positional shift occurs during sliding
Referring to figure 6 and figure 7, the inclined-plane of wedge-shaped fixture block 181 be equipped with guide rod 26, guide rod 26 between pulley 24,
Guide rod 26 is horizontally disposed along the moving direction of wedge-shaped fixture block 181, and the inclined-plane of crushing block 19, which is equipped with, matches cunning with guide rod 26
The matching sliding of dynamic guide groove 27, guide rod 26 and guide groove 27 can make wedge grip block 181 keep steady in moving process
It is fixed, prevent wedge block position in moving process from shifting.
Referring to figure 6 and figure 7, guide rod 26 is bonded on the side wall contradicted with guide groove 27 and is embedded with several steel balls 28, steel ball
28 are arranged in a linear along the moving direction of wedge-shaped fixture block 181, and steel ball 28 is bonded conflict with the bottom wall of guide groove 27, and steel ball 28 is set
The frictional force that can reduce between guided way and guide groove 27 is set, slides guide rod 26 in guide groove 27 more labor-saving.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (7)
1. a kind of shape tube drawbench, including operating platform (1), the drawing mechanism (5) being set on operating platform (1) and shearing
Mechanism (4), it is characterised in that: the drawing mechanism (5) includes the sliding rail being fixedly connected on operating platform (1), is slidably connected
In, for pulling the draw trolley (16) of steel pipe, the sliding rail is arranged along the length direction of operating platform (1), the drawing on sliding rail
The hydraulic cylinder (17) being fixedly connected on trolley (16) for pulling draw trolley (16) is pulled out, the draw trolley (16) leans on near-lying mode
Tool (3) platform (2) side offers opening, and draw trolley (16) internal slide is connected with folder and moves device (18), and the folder is dynamic
Device (18) includes two wedge-shaped fixture blocks (181), and the wedge shape fixture block (181) is bonded sliding with the bottom wall of draw trolley (16),
The opening is equipped with the crushing block (19) for be bonded sliding with the inclined-plane of wedge-shaped fixture block (181), between the wedge-shaped fixture block (181)
It is fixedly connected with U-shaped connection frame (20), is fixedly connected on the U-shaped connection frame (20) for pushing wedge-shaped fixture block (181) to move
Dynamic draft cylinder (21).
2. a kind of shape tube drawbench according to claim 1, it is characterised in that: the wedge shape fixture block (181) and drawing
Rotate and be embedded with pulley (24) on the side wall of trolley (16) fitting, the pulley (24) be bonded with the inner wall of draw trolley (16) to
Touching.
3. a kind of shape tube drawbench according to claim 2, it is characterised in that: the draw trolley (16) and pulley
(24) limiting slot (25) with pulley (24) cooperation sliding is offered on the side wall that fitting contradicts, the limiting slot (25) is along parallel
It is arranged in the length direction of sliding rail.
4. a kind of shape tube drawbench according to claim 1, it is characterised in that: the wedge shape fixture block (181) is backwards to it
The clip slot (22) for pressing from both sides steel pipe is offered on the side wall on inclined-plane, the clip slot (22) sets along the length direction for being parallel to sliding rail
It sets, the cross section semicircular in shape setting of the clip slot (22).
5. a kind of shape tube drawbench according to claim 1, it is characterised in that: two of the U-shaped connection frame (20)
Side is fixedly connected with tensioning spring (23).
6. a kind of shape tube drawbench according to claim 1, it is characterised in that: set on the inclined-plane of wedge-shaped fixture block (181)
Have guide rod (26), the guide rod (26) is horizontally disposed along the moving direction of wedge-shaped fixture block (181), the crushing block (19)
Inclined-plane is equipped with the guide groove (27) that sliding is matched with guide rod (26).
7. a kind of shape tube drawbench according to claim 6, it is characterised in that: the guide rod (26) and guide groove
(27) fitting contradict side wall on be embedded with several steel balls (28), the steel ball (28) be bonded with the bottom wall of guide groove (27) to
Touching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821871659.4U CN209189509U (en) | 2018-11-13 | 2018-11-13 | A kind of shape tube drawbench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821871659.4U CN209189509U (en) | 2018-11-13 | 2018-11-13 | A kind of shape tube drawbench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209189509U true CN209189509U (en) | 2019-08-02 |
Family
ID=67411531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821871659.4U Active CN209189509U (en) | 2018-11-13 | 2018-11-13 | A kind of shape tube drawbench |
Country Status (1)
| Country | Link |
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| CN (1) | CN209189509U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110681709A (en) * | 2019-09-06 | 2020-01-14 | 惠州市纬度设备科技有限公司 | Stainless steel pipe drawing deviation correcting device of high-frequency pipe welding machine |
| CN110899351A (en) * | 2019-12-02 | 2020-03-24 | 浙江天阳钢管有限公司 | Drawing driving mechanism in seamless steel tube drawing machine |
| CN111195658A (en) * | 2020-01-08 | 2020-05-26 | 河北金奥管业有限公司 | Special-shaped rocker shaft seamless steel tube and forming method thereof |
| CN111299907A (en) * | 2020-03-16 | 2020-06-19 | 赵可心 | Welding wire and preparation system and preparation method thereof |
| CN113275400A (en) * | 2021-06-23 | 2021-08-20 | 新乡龙鑫精密模具制造有限公司 | Special drawing equipment for stainless steel cross pipe |
| CN113305344A (en) * | 2021-05-19 | 2021-08-27 | 江西耐乐铜业有限公司 | Mobile phone copper pipe straight pulling device with multiple pulling heads |
| CN115213959A (en) * | 2022-07-18 | 2022-10-21 | 淮南联合大学 | Fixed-length cutting device for automobile cooling water pipe |
| CN116222297A (en) * | 2023-04-13 | 2023-06-06 | 石家庄英杰连铸科技有限公司 | Warhead drawbench with clamping mechanism |
| CN117548513A (en) * | 2023-12-01 | 2024-02-13 | 无锡广兴东茂科技有限公司 | Special-shaped steel drawing device and drawing method |
| CN117732900A (en) * | 2024-01-02 | 2024-03-22 | 浙江三基钢管有限公司 | Cold drawing equipment |
-
2018
- 2018-11-13 CN CN201821871659.4U patent/CN209189509U/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110681709A (en) * | 2019-09-06 | 2020-01-14 | 惠州市纬度设备科技有限公司 | Stainless steel pipe drawing deviation correcting device of high-frequency pipe welding machine |
| CN110681709B (en) * | 2019-09-06 | 2024-05-14 | 惠州市纬度设备科技有限公司 | Stainless steel tube drawing deviation correcting device of high-frequency tube welding machine |
| CN110899351A (en) * | 2019-12-02 | 2020-03-24 | 浙江天阳钢管有限公司 | Drawing driving mechanism in seamless steel tube drawing machine |
| CN110899351B (en) * | 2019-12-02 | 2021-04-27 | 浙江天阳钢管有限公司 | Drawing driving mechanism in seamless steel tube drawing machine |
| CN111195658A (en) * | 2020-01-08 | 2020-05-26 | 河北金奥管业有限公司 | Special-shaped rocker shaft seamless steel tube and forming method thereof |
| CN111299907A (en) * | 2020-03-16 | 2020-06-19 | 赵可心 | Welding wire and preparation system and preparation method thereof |
| CN113305344A (en) * | 2021-05-19 | 2021-08-27 | 江西耐乐铜业有限公司 | Mobile phone copper pipe straight pulling device with multiple pulling heads |
| CN113275400A (en) * | 2021-06-23 | 2021-08-20 | 新乡龙鑫精密模具制造有限公司 | Special drawing equipment for stainless steel cross pipe |
| CN115213959A (en) * | 2022-07-18 | 2022-10-21 | 淮南联合大学 | Fixed-length cutting device for automobile cooling water pipe |
| CN116222297A (en) * | 2023-04-13 | 2023-06-06 | 石家庄英杰连铸科技有限公司 | Warhead drawbench with clamping mechanism |
| CN116222297B (en) * | 2023-04-13 | 2023-10-03 | 石家庄英杰连铸科技有限公司 | Warhead drawbench with clamping mechanism |
| CN117548513A (en) * | 2023-12-01 | 2024-02-13 | 无锡广兴东茂科技有限公司 | Special-shaped steel drawing device and drawing method |
| CN117548513B (en) * | 2023-12-01 | 2024-05-07 | 无锡广兴东茂科技有限公司 | Special-shaped steel drawing device and drawing method |
| CN117732900A (en) * | 2024-01-02 | 2024-03-22 | 浙江三基钢管有限公司 | Cold drawing equipment |
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