CN112091046A - Rolling, hydro-mechanical and deep drawing forming device and method for cylindrical part - Google Patents
Rolling, hydro-mechanical and deep drawing forming device and method for cylindrical part Download PDFInfo
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- CN112091046A CN112091046A CN202011072885.8A CN202011072885A CN112091046A CN 112091046 A CN112091046 A CN 112091046A CN 202011072885 A CN202011072885 A CN 202011072885A CN 112091046 A CN112091046 A CN 112091046A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims description 44
- 238000007789 sealing Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000009785 tube rolling Methods 0.000 claims 4
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007652 sheet-forming process Methods 0.000 description 1
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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
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
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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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
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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
- B21D51/00—Making hollow objects
- B21D51/02—Making hollow objects characterised by the structure of the objects
- B21D51/10—Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a cylindrical part rolling hydromechanical deep drawing forming device which comprises a rolling male die, a female die and a blank holder, wherein a conical rolling surface is arranged at the end part of the rolling male die; the rolling male die can move in the axial direction and the radial direction of the inner cavity of the female die and can rotate around the central shaft of the rolling male die and the central shaft of the inner cavity of the female die; and a channel for filling the liquid medium into the cavity of the female die is arranged on the female die, and a liquid filling valve is arranged on the channel. The invention also discloses a rolling, hydro-mechanical drawing and forming method of the cylindrical part, which adopts the rolling, hydro-mechanical drawing and forming device of the cylindrical part to perform drawing and forming on a plate. The invention relates to a device and a method for rolling, hydro-mechanical deep drawing and forming a cylindrical part, which apply local deep drawing on a plate by swinging a rolling male die so as to finish integral deep drawing of a part. In the drawing process, liquid pressure is applied to the other side of the plate, the stress state of the plate is improved, the forming limit of the plate and the forming quality of parts can be effectively improved, and the cost is saved.
Description
Technical Field
The invention belongs to the technical field of metal processing, and particularly relates to a device and a method for rolling, hydro-mechanical drawing and forming a cylindrical part.
Background
At present, a metal cylindrical part is manufactured by adopting a drawing forming process, has the advantages of high productivity, high material utilization rate, low production cost and the like, and is widely applied to the fields of automobiles, instruments, electronic, aerospace and the like.
However, due to the characteristics of the process, the friction force between the die and the metal plate, especially the blank holder applies blank holder force to the plate, and if the pressure applied by the blank holder is too small, the flange area is easy to be unstably wrinkled. If the edge pressing force is too large, the friction force between the die and the plate is too large, the material is limited to flow from the flange area to the female die, and the problems that the cylindrical part is easy to crack in the drawing process, the wall thickness is not uniform and the like are caused.
Therefore, for the cylindrical part with large drawing coefficient and large height-diameter ratio, the material is difficult to flow and uneven in deformation, and the conventional drawing forming needs multiple sets of dies for drawing, so that the manufacturing precision of the cylindrical part is low, the production cost is improved, and the production period is prolonged.
Disclosure of Invention
The invention aims to provide a device and a method for rolling, hydro-mechanical deep drawing and forming a cylindrical part, which effectively solve the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cylindrical part rolling hydromechanical deep drawing forming device comprises a rolling male die, a female die and a blank holder, wherein the blank holder is arranged above the female die and used for clamping a plate to be formed between the blank holder and the female die, and a conical rolling surface is arranged at the end part of the rolling male die; the rolling male die can move in the axial direction and the radial direction of the inner cavity of the female die and can rotate around the central shaft of the rolling male die and the central shaft of the inner cavity of the female die;
the female die is provided with a channel for filling liquid medium into the inner cavity of the female die, and the channel is provided with a liquid filling valve for controlling the liquid pressure of the inner cavity of the female die.
Compared with the prior art, the rolling hydraulic deep drawing forming device for the cylindrical part disclosed by the invention has the advantages that the local deep drawing is applied to the plate through the up-and-down and left-and-right movement of the rolling male die, the self rotation and the rotation around the central shaft of the female die, and further the integral deep drawing of the part is completed. In the drawing process, liquid pressure is applied to the other side of the plate, the stress state of the plate is improved, the forming limit of the plate and the forming quality of parts can be effectively improved, the cost is saved, and the problems of low drawing limit, uneven wall thickness, cracking, wrinkling and the like caused by difficult material flowing are solved.
Furthermore, the central axis of the rolling convex die and the vertical plane form an acute angle a, and a conical generatrix forming the conical rolling surface is parallel to the plate.
The central shaft of the rolling male die and the vertical plane form an acute angle a, and the conical generatrix is parallel to the plate, so that the rolling male die can accumulate small deformation to the whole deformation of the plate through rolling partial plate, further the forming force of the plate can be reduced, and the forming uniformity of the plate is improved.
Furthermore, a first annular groove is formed in the position, in contact with the plate material, of the blank holder ring and used for installing a first sealing ring; and a second annular groove is formed in the position, in contact with the blank holder, of the female die and used for mounting a second sealing ring.
The annular groove and the sealing ring are arranged, so that the sealing performance can be ensured, and the running stability and effectiveness of the cylindrical part rolling, hydro-mechanical and deep-drawing forming device are further ensured.
Further, the channel is arranged at the center of the bottom of the female die.
The channel is arranged at the center of the bottom of the female die, so that the liquid pressure can be ensured to be uniform, and the manufacture is convenient.
Furthermore, a fillet is arranged at the upper port of the cavity of the female die.
And the round corners are arranged, so that the sheet is convenient to form.
The invention also discloses a rolling, hydro-mechanical deep drawing and forming method for the cylindrical part, which adopts the rolling, hydro-mechanical deep drawing and forming device for the cylindrical part to perform deep drawing and forming on a plate material and specifically comprises the following steps:
s1, placing the plate on the female die, pressing the blank holder downwards to be in contact with the plate, and applying blank holder force F to the blank holder; then opening a liquid filling valve, injecting a liquid medium into the cavity of the female die, and keeping the liquid medium at a certain pressure P;
s2, moving the rolling male die downwards, and simultaneously rotating the rolling male die around the self central shaft; the rolling male die continuously moves downwards for a certain distance h to a certain height position after contacting the initial upper end face of the plate, and then local rolling and deep drawing are completed;
s3, moving the rolling male die upwards to separate from the plate and return to the initial position;
s4, moving the rolling convex die in the radial direction of the cavity of the concave die for a certain distance r to a certain horizontal position; the rolling convex die rotates around the central shaft of the rolling convex die and moves downwards to the height position where the convex die is located at the end in the step S2;
s5, the rolling convex mold rotates around the self central shaft and simultaneously rotates around the central shaft of the cavity of the concave mold with the radius r;
s6, repeating the step S3, the step S4 and the step S5 in sequence, wherein the radial movement distance r of the rolling convex die in the cavity of the concave die is gradually increased until the rolling deep drawing forming of the height position is completed;
s7, moving the rolling male die upwards again, and returning to the initial position after the rolling male die is separated from the plate; then, repeating the step S2, the step S3, the step S4, the step S5 and the step S6 in sequence, wherein the distance h for the rolling male die to continuously move downwards after contacting the initial upper end face of the plate material is gradually increased;
and (3) pressing down to different height positions for multiple times through a rolling male die and moving to different horizontal positions in the radial direction of a female die, further finishing rolling and drawing forming of each height position and each horizontal position until the drawing distance reaches a set height, finally finishing forming of a cylindrical part, and taking down the part.
Compared with the prior art, the method for rolling, hydro-mechanical deep drawing and forming the cylindrical part completes local rolling and deep drawing through the up-and-down movement and the autorotation of the rolling male die and completes integral deep drawing and forming through the left-and-right movement and the revolution of the rolling male die. Compared with the traditional deep drawing forming, the method has the following beneficial effects:
1) the rolling male die gradually finishes the drawing forming of the integral part through local rolling and drawing, improves the uneven deformation of the material and changes the fluidity of the material;
2) increasing liquid filling pressure to the inner cavity of the female die, changing the stress and strain state of the sheet, effectively delaying the thinning speed of the wall thickness of the sheet and improving the forming limit of the sheet;
3) and rolling and hydromechanical deep drawing effectively reduce the deep drawing force and reduce the tonnage requirement and the production cost of equipment.
Further, the initial value of the radial movement distance r of the rolling male die in the cavity of the female die is less than half of the outer diameter of the rolling male die.
The limitation can lead the rolling male die to roll the plate fully and comprehensively, and prevent the part which is not rolled. Meanwhile, the rolling male die can not touch the side wall of the inner cavity of the female die, so that the safety and the normal forming of the plate are ensured.
Further, the initial value of the distance h for the rolling male die to continuously move downwards after contacting the plate is less than half of the depth of the cavity of the female die.
The limitation can ensure that a certain liquid medium is arranged in the cavity of the female die when the plate is formed, so that the liquid medium keeps a certain pressure.
Further, in step S1, the blank holder force F is adjusted according to the deformation of the slab.
In the sheet forming process, the blank holder force F is regulated and controlled according to the sheet deformation condition, so that more sheets at the clamping position can flow to the female die.
Further, in step S1, the pressure P is adjusted according to the stress and strain state of the slab.
The liquid filling pressure is changed, so that the stress and strain states of the plate materials at different forming stages are effectively improved, and the plate material forming limit is improved.
In order that the invention may be more clearly understood, specific embodiments thereof will be described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of a cylindrical part rolling, hydromechanical deep drawing and forming device of the present invention;
FIG. 2 is a schematic view of the initial state of rolling liquid filling in the present invention;
FIG. 3 is a schematic view of local rolling and deep drawing of the rolling male die of the present invention;
FIG. 4 is a schematic view of the rolling male die rotating around the central axis of the female die in the present invention;
fig. 5 is a schematic view of the final cylindrical member formation of the present invention.
Wherein the reference numerals are:
10. rolling a male die; 11. conical rolling surface; 12. a conical bus; 20. a female die; 21. a second annular groove; 22. a second seal ring; 23. round corners; 30. a blank holder; 31. a first annular groove; 32. a first seal ring; 40. a plate material; 50. a liquid medium; 60. a channel; 70. and a liquid filling valve.
Detailed Description
In order to overcome the defects and defects in the prior art, the invention provides a rolling and hydro-mechanical deep drawing forming device and method for a cylindrical part. In the drawing process, liquid pressure is applied to the other side of the plate, the stress state of the plate is improved, the forming limit of the plate and the forming quality of parts can be effectively improved, and the cost is saved.
As shown in fig. 1 to 5, a cylindrical part rolling hydro-mechanical deep drawing forming device comprises a rolling male die 10, a female die 20 and a blank holder 30.
The blank holder 30 is movably arranged above the female die 20, and the blank holder 30 is used for clamping a plate material 40 to be formed between the blank holder 30 and the female die 20.
The end part of the rolling male die 10 is provided with a conical rolling surface 11; the rolling male die 10 can move in the axial direction and the radial direction of the inner cavity of the female die 20 and can rotate around the central axis of the rolling male die and the central axis of the inner cavity of the female die 20. Specifically, the rolling male die 10 is disposed on a machine tool (not shown), which is an existing machine tool, and the rolling male die 10 is mounted on the machine tool, can be driven by the machine tool to move in the axial direction and the radial direction of the inner cavity of the female die 20, and can rotate around the central axis of the rolling male die 10 and the central axis of the inner cavity of the female die 20. More specifically, the central axis of the rolling punch 10 forms an acute angle a with the vertical plane, and a conical generatrix 12 forming the conical rolling surface 11 is parallel to the plate material 40. When the rolling male die 10 rolls the plate material 40, the rolling male die 10 forming a certain included angle with the vertical plane can accumulate small deformation to the whole deformation of the plate material 40 by rolling the local plate material 40, so that the forming force of the plate material 40 can be reduced, and the forming uniformity of the plate material 40 can be improved.
The female die 20 is provided with a channel 60 for filling the cavity of the female die 20 with a liquid medium 50, the channel 60 is provided with a liquid filling valve 70, the liquid filling valve 70 is used for controlling the liquid pressure in the cavity of the female die 20, and the liquid filling valve 70 is conventional in the art and is not described herein.
More specifically, a first annular groove 31 is arranged on the blank holder 30 at a position contacting with the sheet material 40, and is used for installing a first sealing ring 32; and a second annular groove 21 is formed in the position, which is in contact with the blank holder 30, of the female die 20 and is used for installing a second sealing ring 22. Specifically, the first annular groove 31 is arranged at a position close to the opening on the inner cavity of the female die 20, the first sealing ring 32 is matched with the first annular groove 31, and the second sealing ring 22 is matched with the second annular groove 21 so as to perform effective sealing.
More specifically, the channel 60 is disposed at the center of the bottom of the female die 20, and the central axis of the channel 60 coincides with the central axis of the cavity of the female die 20. The uniform pressure of the liquid in the female die 20 can be ensured, and the processing and the manufacturing of the channel 60 are convenient.
More specifically, the upper port of the inner cavity of the female die 20 is provided with a fillet 23, and the fillet 23 is arranged, so that the sheet material 40 can better fit the inner cavity of the female die 20 when deformed, and the sheet material 40 can be formed conveniently.
When the device is used, a machine tool drives the rolling male die 10 to move up and down, move left and right, rotate around the central shaft of the rolling male die and rotate around the central shaft of the inner cavity of the female die 20, and the device gradually applies local rolling deep drawing to a plate material 40 so as to finish integral deep drawing of parts. In the rolling and stretching process, a liquid medium 50 is filled in the inner cavity of the female die 20, so that the liquid pressure acts on the other surface of the plate material 40, and the stress state of the plate material 40 is further improved.
The embodiment also provides a method for rolling, hydro-mechanical deep drawing and forming the cylindrical part, which adopts the device for rolling, hydro-mechanical deep drawing and forming the cylindrical part to perform deep drawing and forming on the plate material 40, and specifically comprises the following steps:
s1, placing the plate material 40 on the female die 20, pressing the blank holder 30 downwards to be in contact with the plate material 40, and applying a blank holder force F to the blank holder 30 by using external equipment; then, opening the liquid filling valve 70, injecting the liquid medium 50 into the cavity of the female die 20, and keeping the liquid medium 50 at a certain pressure P, as shown in fig. 2;
s2, the machine tool drives the rolling male die 10 to move downwards, and meanwhile, the rolling male die 10 rotates around a self central shaft; after contacting the initial upper end face of the plate material 40, the rolling male die 10 continues to move downwards for a certain distance h to a certain height position, and then local rolling and deep drawing are completed, as shown in fig. 3;
s3, moving the rolling male die 10 upwards to separate from the plate material 40 and return to the initial position;
s4, moving the rolling male die 10 to a certain horizontal position in the radial direction of the cavity of the female die 20 by a distance r, namely moving the rolling male die 10 to the left by the distance r; the rolling male die 10 rotates around its central axis and moves down to the height position where the male die is located at the end in step S2, as shown in fig. 4;
s5, the rolling convex die 10 rotates around the self central shaft and simultaneously rotates around the central shaft of the cavity of the concave die 20 with radius r;
s6, repeating the step S3, the step S4 and the step S5 in sequence, wherein the distance r of the radial movement of the rolling convex die 10 in the cavity of the concave die 20 is gradually increased until the rolling deep drawing forming of the height position is completed, as shown in FIG. 4;
s7, moving the rolling male die 10 upwards again, and returning to the initial position after separating from the plate material 40; thereafter repeating step S2, step S3, step S4, step S5 and step S6 in this order; wherein, the distance h of the rolling male die 10 which continues to move downwards after contacting the initial upper end face of the plate material 40 gradually increases;
the rolling male die 10 is pressed down to different height positions for multiple times and moves to different horizontal positions in the radial direction of the female die 20, so that the rolling drawing forming of each height position and horizontal position is completed until the drawing distance reaches the set height, and finally the cylindrical part forming is completed, as shown in fig. 5, and the part is taken down.
Specifically, in this embodiment, the initial value of the distance r of the radial movement of the rolling male die 10 in the cavity of the female die 20 is less than half of the outer diameter of the rolling male die 10, that is, the distance r is less than the length of the conical generatrix 12, so that the rolling male die 10 fully and comprehensively rolls the plate material 40, and the non-rolled part is prevented; meanwhile, the rolling male die 10 can be ensured not to touch the side wall of the inner cavity of the female die 20, so that the safety and the normal forming of the plate 40 are ensured.
More specifically, the initial value of the distance h of the continuous downward movement of the rolling male die 10 after contacting the sheet material 40 is less than half of the depth of the cavity of the female die 20, so that a certain amount of liquid medium 50 is contained in the cavity of the female die 20 when the sheet material 40 is formed, and the liquid medium 50 is kept under a certain pressure.
More specifically, in step S1, the blank holder force F is adjusted according to the deformation of the slab 40, and the pressure P is adjusted according to the stress and strain state of the slab 40. In the forming process of the sheet material 40, the edge pressing force F is regulated according to the deformation condition of the sheet material 40, so that the sheet material 40 at the clamping position can flow to the female die 20 more. Meanwhile, the stress and strain states of the plate material 40 at different forming stages can be effectively improved by adjusting the pressure P, so that the forming limit of the plate material 40 is improved.
Compared with the prior art, the rolling hydraulic deep drawing forming device for the cylindrical part disclosed by the invention has the advantages that the local deep drawing is applied to the plate through the up-and-down and left-and-right movement of the rolling male die, the self rotation and the rotation around the central shaft of the female die, and further the integral deep drawing of the part is completed. In the drawing process, liquid pressure is applied to the other side of the plate, the stress state of the plate is improved, the forming limit of the plate and the forming quality of parts can be effectively improved, the cost is saved, and the problems of low drawing limit, uneven wall thickness, cracking, wrinkling and the like caused by difficult material flowing are solved. The invention relates to a method for rolling, hydro-mechanical deep drawing and forming a cylindrical part, which completes local rolling and deep drawing through the up-and-down movement and the autorotation of a rolling convex die and completes integral deep drawing and forming through the left-and-right movement and the revolution of the rolling convex die. Compared with the traditional deep drawing, the rolling male die gradually finishes the deep drawing of the integral part through local rolling and deep drawing, and improves the uneven deformation of materials; meanwhile, the liquid filling pressure is increased to the inner cavity of the female die, the stress and strain states of the sheet are changed, the speed of reducing the wall thickness of the sheet can be effectively delayed, and the forming limit of the sheet is improved; in addition, the rolling and hydro-mechanical drawing can effectively reduce the drawing force, thereby reducing the tonnage requirement and the production cost of the equipment.
The above-mentioned embodiments only express one embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A cylindrical part rolling hydro-mechanical deep drawing forming device comprises a rolling male die (10), a female die (20) and a blank holder (30), wherein the blank holder (30) is arranged above the female die (20), and the blank holder (30) is used for clamping a plate (40) to be formed between the blank holder (30) and the female die (20), and is characterized in that a conical rolling surface (11) is arranged at the end part of the rolling male die (10); the rolling male die (10) can move in the axial direction and the radial direction of the inner cavity of the female die (20) and can rotate around the central axis of the rolling male die and the central axis of the inner cavity of the female die (20);
the die (20) is provided with a channel (60) for filling the cavity of the die (20) with a liquid medium (50), the channel (60) is provided with a liquid filling valve (70), and the liquid filling valve (70) is used for controlling the liquid pressure in the cavity of the die (20).
2. The cylinder rolling hydro-mechanical deep drawing forming device as claimed in claim 1, characterized in that the central axis of the rolling punch (10) forms an acute angle a with the vertical plane, and a conical generatrix (12) constituting the conical rolling surface (11) is parallel to the sheet material (40).
3. The cylinder rolling, hydromechanical deep drawing and forming device according to claim 1, wherein a first annular groove (31) is formed in the position, which is in contact with the sheet material (40), of the blank holder (30) and is used for installing a first sealing ring (32); and a second annular groove (21) is formed in the position, contacted with the blank holder (30), of the female die (20) and used for mounting a second sealing ring (22).
4. The tube rolling, hydromechanical deep drawing forming apparatus as set forth in claim 1, wherein the passage (60) is provided at a central position of a bottom of the die (20).
5. The tube rolling, hydromechanical deep drawing forming device according to claim 1, wherein the upper port of the cavity of the female die (20) is provided with a fillet (23).
6. A method for rolling, hydro-mechanical deep drawing and forming a cylindrical part, which is characterized in that a sheet metal (40) is deep-drawn and formed by adopting the device for rolling, hydro-mechanical deep drawing and forming the cylindrical part as claimed in any one of claims 1 to 5, and comprises the following steps:
s1, placing the plate (40) on the female die (20), pressing the blank holder (30) downwards to be in contact with the plate (40), and applying a blank holder force F to the blank holder (30); then opening a liquid filling valve (70), injecting a liquid medium (50) into the cavity of the female die (20), and keeping the liquid medium (50) at a certain pressure P;
s2, moving the rolling male die (10) downwards, and simultaneously rotating the rolling male die (10) around the central shaft of the rolling male die; the rolling male die (10) continues to move downwards for a certain distance h to a certain height position after contacting the initial upper end face of the plate (40), and then local rolling and deep drawing are completed;
s3, moving the rolling male die (10) upwards to separate from the plate (40) and return to the initial position;
s4, moving the rolling male die (10) in the radial direction of the cavity of the female die (20) for a certain distance r to a certain horizontal position; the rolling male die (10) rotates around the central shaft of the rolling male die and moves downwards to the height position where the rolling male die (10) is located at the last in the step S2;
s5, the rolling male die (10) rotates around the central shaft of the rolling male die and simultaneously rotates around the central shaft of the inner cavity of the female die (20) with the radius r;
s6, repeating the step S3, the step S4 and the step S5 in sequence, wherein the distance r of the radial movement of the rolling convex die (10) in the cavity of the concave die (20) is gradually increased until the rolling deep drawing forming of the height position is completed;
s7, moving the rolling male die (10) upwards again, and returning to the initial position after separating from the plate (40); then, repeating the step S2, the step S3, the step S4, the step S5 and the step S6 in sequence, wherein the distance h for the rolling male die (10) to continuously move downwards after contacting the initial upper end face of the plate (40) is gradually increased;
the steel pipe is pressed down to different height positions for many times through a rolling convex die (10) and moves to different horizontal positions in the radial direction of a concave die (20), so that rolling and drawing forming of each height position and each horizontal position is completed until the drawing distance reaches a set height, and finally, cylindrical part forming is completed, and parts are taken down.
7. The method for roll forming, hydromechanical deep drawing and forming a cylindrical member according to claim 6, wherein the distance r of radial movement of the rolling punch (10) in the cavity of the die (20) is less than half of the outer diameter of the rolling punch (10) at the initial value.
8. The method for rolling, hydromechanical deep drawing and forming the cylindrical part according to claim 6, wherein the initial value of the distance h of the continuous downward movement of the rolling male die (10) after contacting the sheet metal (40) is less than half of the depth of the inner cavity of the female die (20).
9. The tube rolling, hydromechanical deep drawing method as set forth in claim 6, wherein the blank holder force F is adjusted in accordance with the deformation of the sheet (40) in step S1.
10. The tube rolling, hydromechanical deep drawing method as set forth in claim 6, wherein the pressure P is adjusted in accordance with the stress and strain state of the sheet (40) at step S1.
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| CN202011072885.8A CN112091046A (en) | 2020-10-09 | 2020-10-09 | Rolling, hydro-mechanical and deep drawing forming device and method for cylindrical part |
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| CN202011072885.8A CN112091046A (en) | 2020-10-09 | 2020-10-09 | Rolling, hydro-mechanical and deep drawing forming device and method for cylindrical part |
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