CN112828064A - Adhesive friction shear deformation continuous extrusion device - Google Patents
Adhesive friction shear deformation continuous extrusion device Download PDFInfo
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- CN112828064A CN112828064A CN202110144444.2A CN202110144444A CN112828064A CN 112828064 A CN112828064 A CN 112828064A CN 202110144444 A CN202110144444 A CN 202110144444A CN 112828064 A CN112828064 A CN 112828064A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 83
- 239000000853 adhesive Substances 0.000 title claims abstract description 14
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 210000001624 hip Anatomy 0.000 claims description 3
- 238000010008 shearing Methods 0.000 description 17
- 230000009471 action Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
本发明涉及金属成型领域，公开了一种粘着摩擦剪切变形连续挤压装置，挤压轮的外壁开设有至少两个同轴设置的挤压槽，模腔安装在挤压轮上，挤压槽位于挤压轮与模腔之间，模腔内开设有与挤压槽数量相等的模腔通道，各模腔通道之间通过模桥隔开，各模腔通道的进料端与各挤压槽对应连通；模具安装在模腔内，各模腔通道的出料端通过焊合区域与模具的成型腔连通；各模桥的一端与各模腔通道的进料端位于与挤压轮相切的同一个面上，另一端超出或未至模腔通道的出料端。本装置中从模腔通道流出的两股或多股金属坯料以粘着摩擦剪切变形机制在焊合区域内“焊合”，“焊缝”强度由于受到剧烈剪切变形而大于非焊缝处，彻底解决焊缝导致的焊合强度不足问题。
The invention relates to the field of metal forming, and discloses an adhesive friction shear deformation continuous extrusion device. The outer wall of the extrusion wheel is provided with at least two coaxially arranged extrusion grooves. The groove is located between the extrusion wheel and the cavity, and the cavity is provided with cavity channels equal to the number of extrusion grooves. Each cavity channel is separated by a die bridge. The pressure grooves are correspondingly connected; the mold is installed in the mold cavity, and the discharge end of each mold cavity channel is communicated with the molding cavity of the mold through the welding area; one end of each mold bridge and the feed end of each mold cavity channel are located in the same direction as the extrusion wheel. On the same tangent face, the other end exceeds or does not reach the discharge end of the cavity channel. The two or more strands of metal blanks flowing out of the cavity channel in this device are "welded" in the welding area by the adhesion friction shear deformation mechanism, and the strength of the "welded seam" is greater than that of the non-welded seam due to severe shear deformation , completely solve the problem of insufficient welding strength caused by the weld.
Description
Technical Field
The invention relates to the technical field of metal forming, in particular to an adhesion friction shear deformation continuous extrusion device.
Background
The conventional metal continuous extrusion forming device mainly comprises an extrusion wheel 1, a die cavity 2 and a die 3, wherein at least two extrusion grooves 101 which are coaxially arranged are formed in the outer wall of the extrusion wheel 1, the die cavity 2 is installed on the extrusion wheel 1, the extrusion grooves 101 are positioned between the extrusion wheel 1 and the die cavity 2, die cavity channels 201 with the same number as the extrusion grooves 101 are formed in the die cavity 2, the die cavity channels 201 are separated by a die bridge 202, and the feeding ends of the die cavity channels 201 are correspondingly communicated with the extrusion grooves 101; the die 3 is arranged in the die cavity 2, and the discharge end of each die cavity channel 201 is communicated with the forming cavity 301 of the die 3 through the welding area 4; one end of each die bridge 202 and the feeding end of each die cavity channel 201 are positioned on the same surface tangent to the extrusion wheel 1, and the other ends of the die bridges and the discharging end of each die cavity channel 201 are positioned on the same surface. After two (or more) metal blanks enter the die cavity channel 201, the friction mode in the die cavity 2 is sliding friction, the model welded in the welding area 4 by the two metal blanks after flowing out of the die cavity channel 201 is a pressure welding model, the welding can be realized only by the cooperation of very high pressure and temperature, and the welding has strict requirements on the purity and the gas content of two welding interfaces and the structure.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides an adhesion friction shearing deformation continuous extrusion device, two or more strands of metal blanks flowing out of a die cavity channel are welded in a welding area by an adhesion friction shearing deformation mechanism, the strength of a welding seam is higher than that of a non-welding seam due to severe shearing deformation, and a series of problems of insufficient welding strength and the like caused by the welding seam are thoroughly solved.
The technical scheme is as follows: the invention provides an adhesive friction shearing deformation continuous extrusion device which comprises an extrusion wheel, a die cavity and a die, wherein the outer wall of the extrusion wheel is provided with at least two extrusion grooves which are coaxially arranged, the die cavity is arranged on the extrusion wheel and is positioned between the extrusion wheel and the die cavity, die cavity channels with the same number as the extrusion grooves are arranged in the die cavity, the die cavity channels are respectively separated by a die bridge, and the feeding ends of the die cavity channels are respectively correspondingly communicated with the extrusion grooves; the die is arranged in the die cavity, and the discharge end of each die cavity channel is communicated with the forming cavity of the die through a welding area; one end of each die bridge and the feeding end of each die cavity channel are positioned on the same surface tangent to the extrusion wheel, and the other end of each die bridge exceeds or does not reach the discharging end of each die cavity channel; and the metal blank to be formed is subjected to an adhesion friction shearing deformation mechanism in the die cavity channel and/or the welding area to form a required product.
Preferably, if the other end of each mold bridge exceeds the discharge end of the mold cavity channel, the welding area is located in the mold, or a part of the welding area is located in the mold cavity, and the other part is located in the mold; and if the other end of each die bridge does not reach the discharge end of the die cavity channel, the welding area is positioned in the die cavity, or part of the welding area is positioned in the die cavity, and the other part of the welding area is positioned in the die.
Further, if the welding area is partially or completely located in the die cavity, a positioning ring is mounted around the position, located in the die cavity, of the welding area. Different sized retaining rings determine different depth of the weld area.
Preferably, the inner wall of each of the mold cavity channels is a rough inner wall, and/or the surface of each of the mold bridges is a rough surface. The inner wall of the die cavity channel is designed to be a rough inner wall, so that the metal blank can be subjected to the adhesive friction shearing action of the rough inner wall of the die cavity channel when the inner wall of the die cavity channel is extruded and deformed, and the subsequent welding process can be smoothly carried out; the rough treatment of the inner surfaces of the die cavity channel and the die bridge increases the friction force between the blank and the surfaces of the channel and the die bridge, so that the blank is difficult to slide on the rough surface, and a large dead zone is formed at the rear ends of the die cavity channel and the die bridge, so that the blank belongs to the shearing plastic deformation of the same material when flowing on the surface of the dead zone, namely an adhesion friction shearing deformation mechanism.
Preferably, the rough inner wall is a serrated inner wall, and/or the rough surface is a serrated surface.
Furthermore, the extrusion groove consists of an outer groove and an inner groove which are communicated with each other, the width w2 of the inner groove is larger than the width w1 of the outer groove, and when a plug matched with the extrusion groove in shape is installed in the extrusion groove, a preset gap w3 is formed between the side walls on two sides of the plug and the inner walls on two sides of the outer groove. The contact area between the blank and the side wall of the wheel groove is increased, so that the driving force of extrusion is improved, and the requirement of an adhesion friction shear deformation mechanism on high power requirement is met; the side gap w3 plays a role of a relief, when the blank is blocked in the film cavity or the extrusion force is too large, the blank does not continuously enter the extrusion cavity, but flows out along the relief gap, and the die bridge is prevented from collapsing. Preferably, the distance D between the central axes of two adjacent die cavity channels is 2-5 w 1.
Preferably, if there are two extrusion grooves, there are two die cavity channels of the die cavity channel, and one end of the die bridge close to the die is trapezoidal or triangular. One end of the die bridge, which is close to the die, is designed to be trapezoidal or triangular, a flow dead zone can be easily formed at the end part of one end of the trapezoidal or triangular die, metal blanks in the flow dead zone do not flow, the metal blanks in the flow dead zone can only flow through the edges of the flow dead zone in a shearing mode, two metal flows are welded in a welding area by an adhesion friction shearing deformation mechanism, the strength of a welding line is higher than that of a non-welding line due to severe shearing deformation, and a series of problems of welding and the like caused by the welding line are thoroughly solved.
Preferably, if one end of the die bridge close to the die is trapezoidal, the trapezoidal upper bottom is just opposite to the inlet of the forming cavity of the die, and the included angle between the two waists is 0-45 degrees.
Preferably, if one end of the mold bridge close to the mold is triangular, a sharp angle of the triangle is over against an inlet of the molding cavity of the mold, and the sharp angle is 0-45 degrees.
Preferably, the mould cavity channels are arranged parallel to each other.
Has the advantages that: in the invention, after the metal strip to be molded is conveyed into the die cavity channel of the die cavity under the action of the extrusion groove and the extrusion wheel, the metal strip is extruded from the discharge end of the die cavity channel through extrusion deformation, because the tail end of the die bridge exceeds or does not reach the discharge end of the die cavity channel between every two die cavity channels, after the deformed metal blank is extruded from the die cavity channel, a flowing dead zone exists at the tail end of the die bridge (one end of the die bridge close to the die), the metal blank does not flow in the flowing dead zone, the metal blank around the flowing dead zone can only flow through the edges of the dead zone in a shearing mode, two metal blanks are welded in a welding zone through an adhesion friction shear deformation mechanism, the strength of a welding line is larger than that of a non-welding line due to severe shear deformation, a series of problems such as welding caused by the welding line are thoroughly solved, and then the metal blanks which are welded through the adhesion friction shear deformation mechanism enter the molding cavity of the die for molding, the formed material has uniform and stable performance on the whole cross section, does not have the problems of poor welding seam performance, unstable property and the like, is suitable for continuous extrusion of extrusion wheels with two or more channels, and is particularly suitable for preparing sectional materials with large width-thickness ratio.
When the tail end of the die bridge does not reach the end face of the discharge end of the die cavity: (1) the depth of the welding chamber is increased, and the hydrostatic pressure in the welding chamber is effectively improved on the premise of not changing other parameters, so that the welding pressure of a welding interface is improved, the welding time of a welding seam is prolonged, and the quality of the welding seam is improved; (2) the tail end of the die bridge is easier to stack the blank until the tail end of the die bridge is flush with the discharge end of the die cavity channel, the stacked blank is a half-flow dead zone (namely, the flow rate is less than that of the blank at the central part of the die cavity channel, but is not 0, and has a certain flow rate), the blank continuously flows into and out of the dead zone at a lower speed, and the difference between the outflow speed and the outflow speed of the blank at the central area of the die cavity channel enables the material to generate shear deformation, namely, an adhesion friction shear deformation mechanism.
When the tail end of the die bridge exceeds the end surface of the discharge end of the die cavity: (1) the size of the welding chamber along the Z-axis direction is increased, which is equivalent to increasing the extrusion ratio on the premise of not changing the mold structure, so that the resistance in the welding chamber is increased, the hydrostatic pressure is increased, the welding is facilitated, and the quality of a welding seam is improved; (2) the dead zone area on the surface of the die bridge is lengthened, so that the resistance between the blank and the die bridge is increased, the blank is easier to flow in a mode of adhesion friction shear deformation along the extrusion direction, and the quality of a welding seam is improved; (3) the residual gas at the tail end of the die bridge can be discharged, so that the defect of air holes and cavities which are difficult to eliminate can be avoided by the welding seam.
Drawings
FIG. 1 is a schematic structural diagram of a junction between a die cavity channel and a die in a continuous metal extrusion molding apparatus in the prior art;
FIG. 2 is a schematic structural view of an adhesive friction shear deformation continuous extrusion apparatus according to the present invention;
FIG. 3 is a schematic view showing a structure of a junction between a cavity channel and a mold in embodiment 1;
FIG. 4 is an enlarged view of a pressing groove in the pressing wheel;
FIG. 5 is a front view of the extrusion slot;
FIG. 6 is an elevation view of one of the crush slots in the crush wheel engaging a plug;
FIG. 7 is a schematic view showing a structure of a junction between a cavity channel and a mold in embodiment 2;
FIG. 8 is a schematic view showing the structure of the junction between a cavity channel and a mold in embodiment 3;
FIG. 9 is a schematic view showing the structure of the junction between a cavity channel and a mold in embodiment 4;
fig. 10 is a schematic structural view of a mold bridge in embodiment 6.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Embodiment 1:
the embodiment provides an adhesion friction shear deformation continuous extrusion device, as shown in fig. 2 and 3, the device mainly comprises an extrusion wheel 1, a die cavity 2 and a die 3, wherein the outer wall of the extrusion wheel 1 is provided with two extrusion grooves 101 which are coaxially arranged, the die cavity 2 is arranged on the extrusion wheel 1, the extrusion grooves 101 are positioned between the extrusion wheel 1 and the die cavity 3, two die cavity channels 201 which are parallel to each other are arranged in the die cavity 3, the two die cavity channels 201 are separated by a die bridge 202, and the feeding ends of the two die cavity channels 201 are respectively correspondingly communicated with the two extrusion grooves 101; the die 3 is arranged in the die cavity 2, and the discharge ends of the two die cavity channels 201 are communicated with the forming cavity 301 of the die 3 through the welding area 4 in the die 3; the one end of mould bridge 202 and the feed end of two die cavity passageways 201 all are located on the same face tangent with extrusion wheel 1, and the discharge end that the other end surpassed die cavity passageway 201 is located the seam region 4, and the one end that mould bridge 202 is close to mould 3 is trapezoidal, and trapezoidal upper base is just setting up the discharge end of die cavity passageway 201, and contained angle alpha 1 between two waists is 0~ 45.
As shown in fig. 4 to 6, the extrusion groove 101 is composed of an outer groove 1011 and an inner groove 1012 which are communicated with each other, the width w2 of the inner groove 1012 is greater than the width w1 of the outer groove 1011, and when a plug 6 matched with the extrusion groove 101 in shape is installed in the extrusion groove, a preset gap w3 is provided between the side walls of the plug 6 and the inner walls of the outer groove 1011. The distance D between the central axes of two adjacent mold cavity channels 201 is 3 w 1.
Firstly, cleaning a metal blank to be formed by alkali washing, acid washing and water washing (ultrasonic), then peeling to remove impurities and oxide scales on the surface of the blank, then conveying the metal blank to be formed into a die cavity channel 201 of a die cavity 2 under the action of an extrusion groove 101 and an extrusion wheel 1, extruding the metal blank from a discharge end of the die cavity channel 201 through extrusion deformation, wherein the metal blank does not flow in a flowing dead zone 5 at the tail end of a die bridge 202 (one end of the die bridge 202 close to a die 3) after the deformed metal blank is extruded from the die cavity channel 201 because the tail end of the die bridge 202 exceeds the discharge end of the die cavity channel 201 between every two die cavity channels 201, the metal blank around the flowing dead zone 5 can only flow through the edges of the flowing dead zone 5 in a shearing mode, and the metal flow is welded in a welding zone 4 through an adhesion friction shearing deformation mechanism, then the metal blanks after being welded by the adhesion friction shearing deformation mechanism enter the forming cavity 301 of the die 3 for forming.
Embodiment 2:
this embodiment is substantially the same as embodiment 1, and differs mainly in that in this embodiment, the weld zone 4 is located partly within the cavity 2, partly within the mould 3, and a locating ring 5 is mounted around the part of the weld zone 4 within the cavity, as shown in fig. 7.
Otherwise, this embodiment is identical to embodiment 1, and will not be described herein.
Embodiment 3:
this embodiment is substantially the same as embodiment 1, and differs mainly in that in this embodiment, the weld region 4 is located in the cavity 2 when one end of the two bridges 202 close to the die 3 does not reach the discharge end of the cavity channel 201. As shown in fig. 8.
Otherwise, this embodiment is identical to embodiment 1, and will not be described herein.
Embodiment 4:
this embodiment is substantially the same as embodiment 3, and differs mainly in that in this embodiment the welding area 4 is located partly in the cavity 2, partly in the mould 3, and a positioning ring 5 is mounted around the part of the welding area 4 located in the cavity, as shown in fig. 9.
Otherwise, this embodiment is completely the same as embodiment 3, and will not be described herein.
Embodiment 5:
this embodiment is a further improvement of embodiment 1, 2, 3, or 4, and is mainly improved in that, in this embodiment, the inner wall of the cavity channel is provided as a serrated rough inner wall, and the surface of the mold bridge is provided as a serrated rough surface. Therefore, when the metal blank is extruded and deformed in the die cavity channel, the metal blank can be simultaneously subjected to the adhesive friction shearing action of the serrated rough inner wall of the die cavity channel and the serrated rough surface of the die bridge, so that the subsequent 'welding' process can be smoothly carried out.
Otherwise, this embodiment is completely the same as embodiment 1, 2, 3 or 4, and will not be described herein.
Embodiment 6:
the present embodiment is substantially the same as embodiments 1, 2, 3, 4 or 5, and has the main improvements that in the present embodiment, one end of the mold bridge 202 close to the mold 3 is triangular, the sharp angle of the triangle is disposed opposite to the entrance of the molding cavity 301 of the mold 3, and the sharp angle α 2 is 0 to 45 °, as shown in fig. 10.
Otherwise, this embodiment is completely the same as embodiment 1, 2, 3, 4 or 5, and will not be described herein.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110144444.2A CN112828064A (en) | 2021-02-03 | 2021-02-03 | Adhesive friction shear deformation continuous extrusion device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110144444.2A CN112828064A (en) | 2021-02-03 | 2021-02-03 | Adhesive friction shear deformation continuous extrusion device |
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| GB9100671D0 (en) * | 1990-03-24 | 1991-02-27 | Atomic Energy Authority Uk | Improvement in extrusion |
| US5061163A (en) * | 1988-07-19 | 1991-10-29 | United Kingdom Atomic Energy Authority | Die assembly |
| JPH05185137A (en) * | 1992-01-09 | 1993-07-27 | Furukawa Electric Co Ltd:The | Rotating wheel type continuous extrusion method |
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| JPH11129022A (en) * | 1997-10-28 | 1999-05-18 | Furukawa Electric Co Ltd:The | Rotary wheel type continuous extruding equipment |
| JP2002172418A (en) * | 2000-12-01 | 2002-06-18 | Fujikura Ltd | Apparatus for extruding copper or copper alloy product and method for extruding same using the apparatus |
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-
2021
- 2021-02-03 CN CN202110144444.2A patent/CN112828064A/en active Pending
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