CN113617943A - Drawing die for rectangular-section deep-cylinder thin-wall metal part and machining process thereof - Google Patents
Drawing die for rectangular-section deep-cylinder thin-wall metal part and machining process thereof Download PDFInfo
- Publication number
- CN113617943A CN113617943A CN202110979559.3A CN202110979559A CN113617943A CN 113617943 A CN113617943 A CN 113617943A CN 202110979559 A CN202110979559 A CN 202110979559A CN 113617943 A CN113617943 A CN 113617943A
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- rectangular
- die
- die ring
- roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
Abstract
The invention discloses a drawing die for a rectangular-section deep-cylinder thin-wall metal part and a processing technology thereof, wherein a drawing die assembly comprises a right-angle roller combined die ring and an arc-line roller combined die ring which are vertically arranged according to the drawing technology sequence, wherein the right-angle roller combined die ring comprises a combined die which is at least formed by surrounding four right-angle rollers into a rectangular drawing channel; the arc roller combined die ring comprises a combined die of which at least four arc rollers surround a rectangular drawing channel; the rectangular drawing channels in the right-angle roller combined die ring and the arc roller combined die ring correspond to each other; by adopting the ingenious design and the alternative layout of the right-angle roller combined die ring and the arc roller combined die ring, the processing of the workpiece with the rectangular section is realized on the basis of ensuring the processing quality.
Description
Technical Field
The invention relates to the technical field of metal container processing, in particular to a drawing die for a rectangular-section deep-cylinder thin-wall metal part and a processing technology thereof.
Background
The metal container has wide application in various fields of automobiles, fire fighting, medical treatment, military industry and the like, the product has the characteristic of a typical circular section deep cylinder thin wall, and the forming method generally comprises three technologies of spinning forming, steel pipe welding and drawing forming. With the progress of technology and the development of industrial products, some occasions require products with square section and rectangular section deep cylinder thin-wall characteristics, such as certain special high-pressure containers, special elastomers and the like.
For the processing of a deep cylinder thin wall with a circular section, at present, a rigid die ring is mainly adopted for drawing and forming, and the wall thickness is gradually reduced and the height is increased through multi-pass drawing so as to meet the final size requirement; for example, Chinese patent (CN204934331U) discloses a seamless steel cylinder drawing die, which comprises more than two drawing die rings, more than three roller dies and a sizing die ring which are arranged from top to bottom, wherein the diameters of the drawing die rings from top to bottom are gradually reduced, rollers in each layer of roller die enclose a closed roller die hole along the axis, the roller die holes of each layer are coaxial, the diameters of the roller die holes from top to bottom are gradually reduced, the diameters of the roller die holes enclosed by the sizing die ring and the rollers in the last roller die along the axis are the same, and the roller die holes enclosed by other rollers are circular except the last roller die hole; for another example, chinese patent (CN201632556U) discloses a seamless steel cylinder drawing die, which comprises more than two layers of roller dies, each layer of roller die at least comprises two rollers, and a roller generatrix in each layer of roller die surrounds a substantially closed roller die hole; the roller die holes of each layer are coaxial, the aperture of the roller die hole of each layer is gradually reduced from the beginning to the end along the processing direction of the seamless steel cylinder, and the roller die holes of other layers tend to be circular gradually from the beginning to the end along the processing direction of the seamless steel cylinder except the roller die hole of the last layer; the die holes of the roller of the last layer are round.
However, for the processing of a deep cylinder with a square section and a thin wall, the spinning technology is not necessarily suitable for the forming of the product because of the non-circular section; the welding of the square-section steel tube is a processing idea, but the defect of joint mark exists between the bottle body and the bottle bottom, and the production efficiency is low; therefore, a new technology is designed by adopting the drawing forming idea, and the preparation problem of the products is expected to be solved.
Therefore, in order to solve the above technical problems in the prior art, it is necessary to design a drawing die and a processing process for a rectangular-section deep-tube thin-walled metal product based on the drawing forming concept.
Disclosure of Invention
The invention aims to solve the technical problems and provides a drawing die for a deep-cylinder thin-wall metal workpiece with a rectangular cross section and a machining process thereof.
In order to achieve the purpose, the invention provides the following scheme:
the first scheme is as follows: the drawing assembly comprises a right-angle roller combined die ring and an arc-line roller combined die ring which are vertically arranged according to the drawing process sequence, wherein the right-angle roller combined die ring comprises a combined die at least formed by surrounding four right-angle rollers into a rectangular drawing channel; the arc roller combined die ring comprises a combined die of which at least four arc rollers surround a rectangular drawing channel; the rectangular drawing channels in the right-angle roller combined die ring and the arc roller combined die ring correspond to each other.
Preferably, the size of the rectangular section is changed by changing the size of the right-angle roller; the size and/or shape of the rectangular section can be changed by adding/subtracting additional linear rollers between the right-angle rollers correspondingly.
Preferably, the size and/or shape of the rectangular cross section is changed by changing the size of the oppositely arranged arc rollers.
Preferably, the arc rollers are concave arc rollers.
The drawing die comprises a die rod, a blank sleeved on the die rod and a combined drawing die, wherein the combined drawing die comprises a rigid sizing die ring, a rigid shaping die ring and at least one group of drawing assemblies in the scheme I, the drawing assemblies are vertically arranged between the rigid sizing die ring and the rigid shaping die ring, and a rectangular drawing channel in the drawing assemblies corresponds to rectangular section openings in the rigid sizing die ring and the rigid shaping die ring.
Preferably, the areas of the rectangular cross sections of the rigid sizing die ring, the combined drawing die and the rigid shaping die ring are sequentially reduced from bottom to top.
Preferably, the openings of the rigid sizing die ring and the rigid reshaping die ring are rounded off from the bottom surfaces of the rigid sizing die ring and the rigid reshaping die ring.
Preferably, the openings of the rigid sizing die ring and the rigid reshaping die ring are gradually reduced from the bottom surface to the top surface, and the rigid reshaping die ring is consistent with the machined size of the final part.
Preferably, the drawing assemblies are vertically arranged in two groups according to the drawing process sequence.
Based on the drawing die in the second scheme, the processing technology of the drawing die for the rectangular-section deep-cylinder thin-wall metal workpiece is provided, and the processing technology comprises the following specific steps:
firstly, blank manufacturing, namely heating a square blank to a forging temperature, then carrying out backward extrusion through a punching hydraulic machine, and preforming into a blank to be formed of a thick-wall square cylinder with a bottom;
selecting the type, namely selecting and matching right-angle rollers, arc rollers and linear rollers required in the combined drawing die according to the design process requirement;
step three, forming, namely sleeving a blank to be formed on a die rod, and feeding the blank into a combined drawing die through an opening of a rigid sizing die ring; in the combined drawing die, a blank to be formed is firstly drawn through a rectangular drawing channel surrounded by right-angle rollers and then drawn through a rectangular drawing channel surrounded by arc rollers, if the drawing assembly is provided with a plurality of groups, the blank to be formed still sequentially passes through the drawing channel according to the drawing process, extrusion drawing forming is carried out, and finally the blank to be formed is processed into a rectangular-section deep-cylinder thin-wall metal part with uniform wall thickness.
Compared with the prior art, the invention has the following technical effects:
(1) the invention adopts the roller wheel combined die ring to replace a rigid die ring, changes sliding friction into rolling friction aiming at the drawing process of the traditional rigid die ring, solves the problem of large friction resistance, simultaneously facilitates the promotion of metal flow by relative rolling motion, improves the forming quality and prolongs the service life of a die;
(2) the invention adopts the ingenious design of the right-angle roller combined die ring and the arc-line roller combined die ring, can realize the drawing forming process of the deep-cylinder thin-wall workpiece with the non-axisymmetric section, thereby solving the problem that the roller combined drawing die is only limited to the processing of the workpiece with the circular section;
(3) the invention adopts the structural design that the right-angle roller combined die ring and the arc roller combined die ring are alternately arranged, thereby ensuring the forming quality and the wall thickness uniformity; firstly, the forming quality of a section corner can be ensured by the action of the right-angle roller combined die ring on a blank, but ribs are easily generated on a straight-wall section due to the die clearance; the arc roller die rings are adopted in the straight wall section to form the blank, and the shaping function is added during the forming, so that the two die rings alternately act to simultaneously ensure the forming quality of the corner part and the straight wall section; secondly, when right angle running roller combination mould circle takes shape to the blank, because running roller right angle department is different with the edge linear velocity, cause the velocity of flow of material on the cross-section different, cross-section right angle department flows slowly promptly, straight wall section center department flows fast, finally lead to the wall thickness distribution from right angle department to straight wall section center for the attenuation gradually, consequently straight wall section running roller adopts the design of pitch arc running roller, when making arc running roller combination mould circle take shape to the blank, straight wall section material flows slowly, the material of right angle department flows fast, just in time has formed complementarily with the effect of right angle running roller combination mould circle, thereby the homogeneity of wall thickness has been guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a perspective view of an embodiment of the present invention;
FIG. 2 is a front plan view of an embodiment of the present invention;
FIG. 3 is a sectional view of the segments of FIG. 2;
FIG. 4 is a perspective view of a second embodiment of the present invention;
FIG. 5 is a two-plane front view of an embodiment of the present invention;
FIG. 6 is a sectional view of the segments of FIG. 5;
FIG. 7 is a force diagram of the right angle roller structure of the present invention;
FIG. 8 is a diagram of an arc roller configuration of the present invention;
wherein, 1-a die rod, 2-a blank, 3-a combined drawing die and 3-1-a rigid positioning die ring; 3-2-right angle roller combined die ring; 3-3-arc line roller wheel combined die ring; 3-4-right-angle roller; 3-5-arc roller; 3-6-rigid plastic mould ring.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a drawing die for a deep-cylinder thin-wall metal workpiece with a rectangular cross section and a machining process thereof.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
as shown in fig. 1 and fig. 2, the present embodiment provides a drawing die for a rectangular-section deep-tube thin-wall metal product, which includes a die rod 1, a blank 2 sleeved on the die rod 1, and a combined drawing die 3, wherein the combined drawing die 3 includes a rigid sizing die ring 3-1, a rigid shaping die ring 3-6, and drawing assemblies vertically arranged between the rigid sizing die ring 3-1 and the rigid shaping die ring 3-6, and in the present embodiment, two groups of drawing assemblies are vertically arranged between the rigid sizing die ring 3-1 and the rigid shaping die ring 3-6 according to a drawing process sequence.
The drawing assembly comprises a right-angle roller combined die ring 3-2 and an arc-line roller combined die ring 3-3 which are vertically arranged according to the drawing process sequence, wherein the right-angle roller combined die ring 3-2 comprises a combined die of which four right-angle rollers 3-4 enclose a rectangular drawing channel as shown in figure 3; the arc line roller combined die ring 3-3 comprises a combined die of which a rectangular drawing channel is enclosed by four arc line rollers 3-5; the rectangular drawing channel in the right-angle roller combined die ring 3-2 and the arc-line roller combined die ring 3-3 corresponds to the rectangular drawing channel in the drawing assembly, and the rectangular drawing channel in the drawing assembly corresponds to the rectangular section openings in the rigid sizing die ring 3-1 and the rigid shaping die ring 3-2.
The principle applied in the forming process of the drawing die is as follows:
as shown in fig. 7, after the blank 2 to be formed enters the right angle roller combination die ring 3-2 of the first pass through the rigid positioning die ring 3-1, the linear velocity of the point a (a ') far away from the rotation axis on the right angle roller 3-4 in the right angle roller combination die ring 3-2 is greater than the linear velocity of the point B near the rotation axis of the roller, which results in the metal flow velocity of the point a (a ') being greater than the metal flow velocity of the point B during the forming process, and at the same time, when the die rod 1 extrudes the workpiece to enter the right angle roller combination die ring 3-2, the workpiece will generate the acting force F shown in the middle of the right angle roller 3-4, which will cause the roller to generate a certain bending deformation, the point a (a ') moves towards the workpiece, the point B moves away from the workpiece, and the two reasons result in the forming process of the right angle roller combination die ring 3-2, the wall thickness of four corner areas of a rectangular section can be generated, and the wall thickness of the central area of each side is thin, so that the arc roller combined die ring 3-3 needs to be matched, namely, the concave arc roller 3-5 carries out a compensation type forming processing process on a workpiece.
As shown in fig. 8, in the forming process, a force F 'applied to the roller by the workpiece causes the central area of the roller to move away from the workpiece, the two side areas of the roller move towards the direction close to the workpiece, and at this time, the linear velocity difference of each point on the concave camber line MM' of the outer surface of the camber line roller 3-5 is combined (i.e., the linear velocity of the two sides is high, the linear velocity of the middle is low, the metal flow velocity of the four corner areas of the workpiece is high, and the metal flow velocity of the straight wall area is low), so that the uneven wall thickness generated by the former forming of the right-angle roller combined die ring 3-2 is processed to be uniform, the two types of roller combined die rings of the right-angle roller combined die ring 3-2 and the camber line roller combined die ring 3-3 are complemented, the uniformity of the formed wall thickness is ensured, and the whole forming process is completed through the rigid shaping die rings 3-6 after the multi-pass processing.
Example two:
as shown in fig. 2, based on the first embodiment, the drawing die for a deep-tube thin-walled metal product with a rectangular cross section provided in the present embodiment is different from the first embodiment in that the present embodiment is directed to a deep-tube thin-walled metal product with a rectangular cross section, and the combined drawing die 3 is adjusted accordingly.
As shown in FIGS. 4 and 5, the openings in the rigid sizing die ring 3-1 and the rigid sizing die ring 3-6 are rectangular in cross section.
As shown in fig. 6, in the drawing assembly, additional linear rollers are respectively added between the right-angle rollers 3-4 positioned on two opposite sides of the right-angle roller combined die ring 3-2, so as to enclose a rectangular drawing channel; arc rollers 3-5 on two opposite sides in the arc roller combined die ring 3-3 are replaced by arc rollers 3-5 with longer length, so that a rectangular drawing channel is enclosed; the rectangular drawing channel in the right-angle roller combined die ring 3-2 corresponds to the rectangular drawing channel in the arc-line roller combined die ring 3-3, and the rectangular drawing channel in the drawing assembly corresponds to the rectangular section opening surfaces on the rigid sizing die ring 3-1 and the rigid shaping die ring 3-2.
Furthermore, namely, the size of the rectangular section can be changed by changing the size of the right-angle roller; the size and/or the shape of the rectangular section are changed by correspondingly increasing/decreasing additional linear rollers between the right-angle rollers; the size and/or shape of the rectangular section can be changed by changing the size of the arc rollers which are oppositely arranged.
Example three:
based on the drawing die for the rectangular-section deep-cylinder thin-wall metal part provided in the first embodiment and the second embodiment, the embodiment provides a drawing die for a rectangular-section deep-cylinder thin-wall metal part, which comprises the following specific steps:
firstly, heating the square blank 2 to a forging temperature, then carrying out backward extrusion by a punching hydraulic machine, and preforming into a blank 2 to be formed of a thick-wall square cylinder with a bottom.
And step two, selecting the type, namely selecting and matching the right-angle roller 3-4, the arc-line roller 3-5 and the straight-line roller required in the combined drawing die according to the design process requirement.
Specifically, if a deep-tube thin-wall metal part with a square cross section needs to be processed, the roller wheel combination mode in the first embodiment is adopted; if the deep-cylinder thin-wall metal part with the rectangular section needs to be processed, the roller combination mode in the second embodiment is adopted.
Step three, forming, namely sleeving a blank 2 to be formed on a die rod 1, and feeding the blank into a combined drawing die 3 through a rigid sizing die ring opening 3-1; in the combined drawing die 3, the blank 2 to be formed firstly passes through a rectangular drawing channel surrounded by right-angle rollers 3-4 and then passes through a rectangular drawing channel surrounded by arc rollers 3-5, if the drawing assembly is provided with a plurality of groups, the blank 2 to be formed still passes through the drawing channels of each pass according to the drawing procedure to be extruded and drawn, and finally the blank 2 to be formed is processed into a rectangular-section deep-cylinder thin-wall metal part with uniform wall thickness.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a drawing subassembly of deep section of thick bamboo thin wall metal part of rectangular cross section which characterized in that: the drawing die comprises a right-angle roller combined die ring and an arc-line roller combined die ring which are vertically arranged according to the drawing process sequence, wherein the right-angle roller combined die ring comprises a combined die of which at least four right-angle rollers surround a rectangular drawing channel; the arc roller combined die ring comprises a combined die of which at least four arc rollers surround a rectangular drawing channel; the rectangular drawing channels in the right-angle roller combined die ring and the arc roller combined die ring correspond to each other.
2. Drawing assembly of a rectangular section deep-tube thin-walled metal object according to claim 1, characterized in that: the size of the rectangular section is changed by changing the size of the right-angle roller; the size and/or shape of the rectangular section is changed by adding/subtracting additional linear rollers between the right-angle rollers correspondingly.
3. Drawing assembly of a rectangular section deep-tube thin-walled metal object according to claim 2, characterized in that: the size and/or the shape of the rectangular section are/is changed by changing the size of the arc rollers which are oppositely arranged.
4. Drawing assembly of a rectangular section deep-tube thin-walled metal object according to claim 3, characterized in that: the arc line roller is a concave arc line roller.
5. The drawing die for the rectangular-section deep-cylinder thin-wall metal part is characterized in that: the drawing assembly comprises a die rod, a blank sleeved on the die rod and a combined drawing die, wherein the combined drawing die comprises a rigid sizing die ring, a rigid shaping die ring and at least one group of drawing assemblies of rectangular-section deep-tube thin-wall metal parts, the group of drawing assemblies is vertically arranged between the rigid sizing die ring and the rigid shaping die ring and is as claimed in claims 1 to 4, and a rectangular drawing channel in the drawing assemblies corresponds to rectangular-section openings in the rigid sizing die ring and the rigid shaping die ring.
6. The drawing die for the rectangular-section deep-cylinder thin-wall metal part according to claim 5, characterized in that: the areas of the rectangular cross sections of the rigid sizing die ring, the combined drawing die and the rigid shaping die ring are reduced in sequence from bottom to top.
7. The drawing die for the rectangular-section deep-cylinder thin-wall metal part according to claim 6, characterized in that: the openings of the rigid sizing die ring and the rigid shaping die ring are provided with round corners with the bottom surfaces thereof.
8. The drawing die for the rectangular-section deep-cylinder thin-wall metal part according to claim 7, characterized in that: the openings of the rigid sizing die ring and the rigid shaping die ring are gradually reduced from the bottom surface to the top surface, and the rigid shaping die ring is consistent with the machining size of the final part.
9. The drawing die for the rectangular-section deep-cylinder thin-wall metal part according to claim 8, characterized in that: the drawing assemblies are vertically arranged in two groups according to the drawing process sequence.
10. A processing technology of a rectangular-section deep-cylinder thin-wall metal part is characterized by comprising the following steps: the drawing die for the rectangular-section deep-cylinder thin-wall metal part based on the claim 9 comprises the following specific steps:
s1, blank making, namely heating the square blank to a forging temperature, reversely extruding the square blank by a punching hydraulic machine, and performing to form a blank to be formed of a thick-wall square cylinder with a bottom;
s2, selecting the type, and selecting the right-angle roller, the arc roller and the linear roller which are required in the combined drawing die according to the design process requirement;
s3, forming, namely sleeving the blank to be formed on the die rod, and sending the blank to be formed into the combined drawing die through the opening of the rigid sizing die ring; in the combined drawing die, the blank to be formed firstly passes through a rectangular drawing channel formed by enclosing of the right-angle rollers and then passes through a rectangular drawing channel formed by enclosing of the arc rollers, if the drawing assembly is provided with a plurality of groups, the blank to be formed still passes through the drawing channel according to the drawing process to be extruded and drawn, and finally the blank to be formed is processed into a rectangular-section deep-cylinder thin-wall metal part with uniform wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110979559.3A CN113617943B (en) | 2021-08-25 | 2021-08-25 | Drawing die for rectangular-section deep-cylinder thin-wall metal part and machining process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110979559.3A CN113617943B (en) | 2021-08-25 | 2021-08-25 | Drawing die for rectangular-section deep-cylinder thin-wall metal part and machining process thereof |
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| Publication Number | Publication Date |
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| CN113617943A true CN113617943A (en) | 2021-11-09 |
| CN113617943B CN113617943B (en) | 2022-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117443961A (en) * | 2023-09-25 | 2024-01-26 | 合肥工业大学 | Drawing and rolling die assembly for square shell |
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| DE1965819A1 (en) * | 1969-12-22 | 1971-06-24 | Mannesmann Meer Ag | Straightening head for thin-walled profile - pipes |
| JPS63230222A (en) * | 1987-03-16 | 1988-09-26 | Sumitomo Metal Ind Ltd | Manufacture of dissimilar pipe |
| JP2001522310A (en) * | 1997-03-19 | 2001-11-13 | ジェイムズ ティー ソーダー | Tool for end drawing of tangible hollow metal tube |
| CN101767150A (en) * | 2009-12-30 | 2010-07-07 | 燕山大学 | Stretch drawing die for seamless steel cylinder |
| CN108607880A (en) * | 2018-05-18 | 2018-10-02 | 石家庄轴设机电设备有限公司 | Square rectangle wedge angle pipe hot forming production line |
| CN211437480U (en) * | 2019-12-31 | 2020-09-08 | 河北途铂机电设备有限责任公司 | Square tube shaping rolling device |
| CN113172158A (en) * | 2021-05-31 | 2021-07-27 | 燕山大学 | Drawing female die, combined drawing die and drawing method for box-shaped piece |
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2021
- 2021-08-25 CN CN202110979559.3A patent/CN113617943B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1965819A1 (en) * | 1969-12-22 | 1971-06-24 | Mannesmann Meer Ag | Straightening head for thin-walled profile - pipes |
| JPS63230222A (en) * | 1987-03-16 | 1988-09-26 | Sumitomo Metal Ind Ltd | Manufacture of dissimilar pipe |
| JP2001522310A (en) * | 1997-03-19 | 2001-11-13 | ジェイムズ ティー ソーダー | Tool for end drawing of tangible hollow metal tube |
| CN101767150A (en) * | 2009-12-30 | 2010-07-07 | 燕山大学 | Stretch drawing die for seamless steel cylinder |
| CN108607880A (en) * | 2018-05-18 | 2018-10-02 | 石家庄轴设机电设备有限公司 | Square rectangle wedge angle pipe hot forming production line |
| CN211437480U (en) * | 2019-12-31 | 2020-09-08 | 河北途铂机电设备有限责任公司 | Square tube shaping rolling device |
| CN113172158A (en) * | 2021-05-31 | 2021-07-27 | 燕山大学 | Drawing female die, combined drawing die and drawing method for box-shaped piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117443961A (en) * | 2023-09-25 | 2024-01-26 | 合肥工业大学 | Drawing and rolling die assembly for square shell |
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| CN113617943B (en) | 2022-08-30 |
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