CN115870360B - A multi-constraint step-by-step extrusion die for large-scale anisotropic and shaped box blanks - Google Patents
A multi-constraint step-by-step extrusion die for large-scale anisotropic and shaped box blanks Download PDFInfo
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- CN115870360B CN115870360B CN202211463246.3A CN202211463246A CN115870360B CN 115870360 B CN115870360 B CN 115870360B CN 202211463246 A CN202211463246 A CN 202211463246A CN 115870360 B CN115870360 B CN 115870360B
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Abstract
本发明公开一种大型异向异型箱体毛坯多约束分步挤压成形模具，包括第一套模具和第二套模具，第一套模具包括上模具组件和下模具组件，上模具组件包括上模板、凸模、大砧板、小砧板和手柄，下模具组件包括第一凹模、内应力圈、外应力圈、下模板、顶杆，所述第一凹设有供坯料置入的内腔，大砧板的下端伸入内腔的中部和右部挤压坯料；第二套模具包括上模板、长条形凸模、拱形凸模、第二凹模、上应力圈、下应力圈，第二凹模内设有容纳腔和拱形腔，长条形凸模和拱形凸模的下端分别伸入容纳腔和拱形腔挤压坯料。本发明设计巧妙，通过两套模具改变坯料的受力位置，将二维挤压转变为三维挤压，合理施加压力，有效降低成形载荷，制成满足服役条件的产品。
The present invention discloses a multi-constraint step-by-step extrusion forming die for a large-scale anisotropic and shaped box blank, comprising a first set of dies and a second set of dies, wherein the first set of dies comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper template, a punch, a large anvil, a small anvil and a handle, and the lower die assembly comprises a first concave die, an inner stress ring, an outer stress ring, a lower die plate and a push rod, wherein the first concave is provided with an inner cavity for placing the blank, and the lower end of the large anvil extends into the middle and right part of the inner cavity to extrude the blank; the second set of dies comprises an upper template, a long strip punch, an arched punch, a second concave die, an upper stress ring and a lower stress ring, wherein a receiving cavity and an arched cavity are provided in the second concave die, and the lower ends of the long strip punch and the arched punch extend into the receiving cavity and the arched cavity respectively to extrude the blank. The present invention is ingeniously designed, wherein the force position of the blank is changed by two sets of dies, and two-dimensional extrusion is transformed into three-dimensional extrusion, and pressure is reasonably applied, and the forming load is effectively reduced to form a product that meets the service conditions.
Description
Technical Field
The invention belongs to the technical field of plastic processing and forming of metal materials, and particularly relates to a multi-constraint step extrusion forming die for a large-sized abnormal-shaped box blank.
Background
Along with the continuous development of the industrial age, the special-shaped box body with light weight, integration and complexity gradually becomes the first choice of special equipment and large-scale complex components. The box body has the characteristics of complex structure, larger size and the like, in particular to a special-shaped box body with an anisotropic boss, the forming direction of the boss of the special-shaped box body component and the forming direction of the whole box body are not in the same plane, so the special-shaped box body component has the forming difficulty of ensuring that the redundant blank flows to the required part by reasonably designing the structure of a die, the traditional box body forming method usually adopts a set of dies and only performs extrusion forming from one plane direction, the forming load of the box body formed by adopting the traditional dies is overlarge, the tissue uniformity, the material utilization rate of the box body are damaged, and the mechanical property is difficult to ensure. Therefore, it is desirable to provide a mold that overcomes the above drawbacks to meet service conditions for such large-sized, contoured box members.
Disclosure of Invention
The invention aims to provide a multi-constraint step extrusion forming die for a large-sized abnormal-shaped box blank, wherein the conventional two-dimensional extrusion is converted into three-dimensional extrusion through two sets of dies, and complex boss parts are formed by multiple distributed extrusion according to a metal flow rule, so that forming load is reduced, and the utilization rate and production efficiency of materials are improved.
In order to achieve the aim, the invention adopts the solution that the multi-constraint step extrusion forming die for the large-scale abnormal-shaped box blank comprises a first set of die and a second set of die;
The first set of die comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die plate, a male die, a large chopping board, a small chopping board and a handle, the upper die plate is structurally connected with the upper part of the press, the male die is fixed at the lower end of the upper die plate, the large chopping board and the small chopping board are arranged below the male die, the handle is connected with the large chopping board, the lower die assembly comprises a first female die, an internal stress ring, an external stress ring, a lower die plate, a top plate and a push rod, the lower die plate is connected with the lower part of the press, the internal stress ring is fixed on the lower die plate, the first female die and the top plate are arranged inside the internal stress ring, the first female die is arranged on the top plate, the first female die is formed by a plurality of inserts, the inserts are arranged below the male die to form a transverse T-shaped inner cavity for placing blanks, the length of the large chopping board is the same as the width of the right part and the middle part of the inner cavity, the large chopping board is enabled to move above the right part and the middle part of the inner cavity through the handle, so that the lower end of the large chopping board stretches into the inner cavity or the middle part of the inner cavity or the inner cavity of the small chopping board is enabled to stretch out of the inner cavity or the middle part of the inner cavity, the size of the inner cavity is enabled to stretch out of the inner cavity or the inner cavity of the small chopping board is matched with the left inner cavity and the inner cavity after the small cavity is extruded by the small cavity and the small cavity is matched with the size of the inner cavity;
The second set of dies comprises an upper die plate, a strip-shaped male die, an arch-shaped male die, a second female die, an upper stress ring and a lower stress ring, wherein the upper die plate is connected with the upper part of a press machine, the strip-shaped male die and the arch-shaped male die are arranged at the lower end of the lower die plate, a containing cavity for overturning a blank extruded by the first set of dies by 90 degrees and then placing the blank in the containing cavity is arranged in the second female die, the strip-shaped male die is the same as the upper part of the containing cavity in size, so that the lower end of the strip-shaped male die stretches into the containing cavity to extrude the blank, an arch-shaped cavity is convexly arranged at the top of the containing cavity, the size of the arch-shaped male die is the same as that of the arch-shaped cavity, so that the lower end of the arch-shaped male die stretches into the arch-shaped cavity to extrude the blank, the upper stress ring is sleeved on the upper part of the second female die, and the lower stress ring is sleeved on the lower part of the second female die.
Further, the first female die consists of five inserts, wherein the five inserts comprise one insert arranged at the front part, the rear part and the right part respectively, and two inserts arranged at the left part in parallel front and rear, the five inserts enclose a transverse T-shaped inner cavity, and the insert at the left front part is taken away to enable the large chopping board and the small chopping board to be pressed down to form a T-shaped box body with a bulge at the left front part.
Further, the handle is arranged on one side of the length direction of the large chopping board and is always positioned above the first female die, the internal stress ring and the external stress ring.
Further, the upper die plate and the male die, and the lower die plate and the internal stress ring are fixedly connected through screws.
Further, the second set of die is used for extruding and forming a T-shaped box body with a horizontal boss at the top.
Further, the second female die is an assembling female die and consists of a plurality of side plates and a bottom plate, and the extruded box body is taken out by disassembling the side plates.
Further, a fixed backing plate is arranged between the strip-shaped male die and the arch-shaped male die as well as between the upper die plate, and is fixed with the upper template through a fixed backing plate.
Further, a sliding groove is formed in the lower end of the fixed base plate, guide rails matched with the sliding groove are arranged at the tops of the strip-shaped male die and the arch-shaped male die, and the guide rails are clamped with the sliding groove to enable the strip-shaped male die and the arch-shaped male die to be fixed with the fixed base plate.
Further, the upper template and the fixed base plate are connected and fixed through screws.
Further, the second set of molds further includes a support block filling a lower portion of the arch cavity to support the second female mold.
After the scheme is adopted, the gain effect of the invention is as follows:
According to the invention, two sets of dies are designed, two extrusion processes can be performed through the two sets of dies, namely, blanks are extruded in a distributed manner from two plane directions, the flow rule of metal can be fully utilized, the special-shaped box body with the boss can be formed finally, and the utilization rate and the production efficiency of materials are improved. The invention has ingenious design, is provided with two concave dies which can respectively hold blanks to be placed in from the horizontal direction and the vertical direction, changes the two-dimensional extrusion into the three-dimensional extrusion by changing the stress position of the blanks, reasonably applies pressure, effectively reduces the forming load, and uses fewer steps and smaller pressure to prepare the product meeting the service condition.
In addition, the invention designs the cutting boards with different sizes, the strip-shaped male dies and the arch-shaped male dies with different shapes to extrude the blank in a distributed mode, the stress area of the blank can be changed, the metal stress state, the equivalent strain quantity, the plastic deformation, the tissue uniformity and the like can be better controlled, smooth forming is ensured, meanwhile, the two sets of dies adopt a hot extrusion forming technology, compared with a cold extrusion technology, extrusion pressure is greatly reduced, and the near-net forming is ensured, and meanwhile, the optimal comprehensive mechanical property of the material is ensured.
Drawings
FIG. 1 is a cross-sectional view of a first set of molds of the invention;
FIG. 2 is a schematic view of the structure of a first set of the mold according to the present invention;
FIG. 3 is a top view of the lower die assembly of the present invention with the left front insert removed;
FIG. 4 is a top view of the completed lower mold assembly of the present invention;
FIG. 5 is a schematic diagram of the structure of the large cutting board in the first pressing state;
FIG. 6 is a schematic diagram of the structure of the large cutting board in the second pressing state;
FIG. 7 is a schematic view showing the structure of the small chopping board in the pressed state of the invention;
FIG. 8 is a schematic view of a blank formed in a first process of the present invention;
FIG. 9 is a schematic view of the structure of a second set of molds of the present invention;
FIG. 10 is an exploded view of a second set of molds of the invention;
FIG. 11 is a cross-sectional view of a second set of molds of the invention;
FIG. 12 is a top view of a second female die of the present invention;
figure 13 is a top view of an elongated punch of the present invention;
figure 14 is a top view of an arch punch of the present invention;
Fig. 15 is a schematic structural view of the finally produced case of the present invention.
Description of the reference numerals:
1. The method comprises the steps of forming a box body by a target, 11, a boss, 2, a first set of dies, 201, an upper die plate, 202, a male die, 203, a large cutting board, 204, a small cutting board, 205, a handle, 206, a first female die, 2061, an insert, 207, an inner stress ring, 208, an outer stress ring, 209, a lower die plate, 210, a top plate, 211, a push rod, 212, an inner cavity, 213, an arc-shaped cavity, 3, a second set of dies, 31, an elongated male die, 32, an arc-shaped male die, 321, a guide rail, 33, a second female die, 331, a side plate, 332, a bottom plate, 333, a containing cavity, 334, an arc-shaped cavity, 34, an upper stress ring, 35, a lower stress ring, 36, a fixed base plate, 361, a chute, 37, a supporting block, 38, a patch, 4, a blank, 41, a boss, 5 and a screw.
Detailed Description
As shown in fig. 15, the object forming box 1 of the present invention is in a shape of a T, when the box is placed vertically, the top of the box is provided with a horizontal boss 11 protruding forward, the boss 11 and the whole box are not on the same plane, so that the forming direction of the boss 11 and the forming direction of the whole box are not on the same plane, and the conventional extrusion mode is single-side centralized forming or integral one-time forming, which brings about the problem of uneven forming load, therefore, the difficulty of forming the special-shaped box member is how to reasonably design the shape of the forging piece and the structure of the female die to flow the redundant blank 4 to the required part, namely, the horizontal boss 11 part of the present invention, and reasonably control the forming load.
The invention provides a multi-constraint step extrusion forming die for a large-sized anisotropic special-shaped box blank, which comprises a first die set 2 and a second die set 3, wherein the first die set 2 comprises an upper die assembly and a lower die assembly as shown in fig. 1-7, the upper die assembly comprises an upper die plate 201, a male die 202, a large cutting board 203, a small cutting board 204 and a handle 205, the upper die plate 201 is connected with the upper part structure of a press, the male die 202 is fixed at the lower end of the upper die plate 201, the large cutting board 203 and the small cutting board 204 are arranged below the male die 202, the handle 205 is connected with the large cutting board 203, and the large cutting board 203 can be moved by driving the handle 205.
The lower die assembly comprises a first female die 206, an inner stress ring 207, an outer stress ring 208, a lower die plate 209, a top plate 210 and a top rod 211, wherein the lower die plate 209 is connected with the lower part of the press, the inner stress ring 207 is fixed on the lower die plate 209, the first female die 206 and the top plate 210 are arranged inside the inner stress ring 207, and the first female die 206 is arranged on the top plate 210; the first female die 206 is formed by splicing a plurality of detachable inserts 2061, and comprises one insert 2061 arranged at the front part, the rear part and the right part, two inserts 2061 arranged at the left part in parallel front and rear, five inserts 2061 are surrounded below the male die 202 to form a transverse T-shaped inner cavity 212 for placing a blank 4, the left front part of the T-shaped inner cavity 212 extends leftwards to form an arc-shaped cavity 213, the arc-shaped cavity 213 is filled by the insert 2061 at the left front part, the male die 202 can be in a T-shaped shape which is correspondingly matched with the first female die 206 to realize full extrusion, the manufacturing materials of the male die 202 are reduced, the length of the large cutting board 203 is the same as the width of the right part and the middle part of the inner cavity 212, the large cutting board 203 can be moved above the right part and the middle part of the inner cavity 212 through a handle 205, the lower end of the inner cavity 212 can be extended into the right part and the middle part of the inner cavity 212 to extrude the blank 4, the handle 205 is arranged at one side of the length direction of the large cutting board 212, the handle 205 is always positioned at one side of the length direction of the large cutting board 203, the handle 205 is positioned at the first female die 206, the inner stress ring 207 and the inner stress ring 207 is always in the left front of the inner cavity 208, the inner cavity 208 is matched with the inner cavity 208, the inner cavity 208 is not matched with the inner cavity 208 in the size of the inner cavity 204 is matched with the inner cavity 204, the inner cavity 208 is the inner cavity 204 is matched with the inner cavity 204, the inner cavity 204 is the lower than the inner cavity 204 is matched with the inner cavity 204 is the lower than the inner cavity is the lower cavity is matched with the inner cavity is and the lower cavity is the lower, the inner cavity is matched with the inner cavity is with the inner cavity 4 is, the inner stress ring 207 and the outer stress ring 208 are matched internally and externally to further improve the strength of the die and prevent the blank 4 from being damaged by stress overload. The upper die plate 201 and the male die 202, the lower die plate 209 and the internal stress ring 207 are fixedly connected through the screw 5, so that the male die 202 is prevented from sliding relative to the upper die plate 201, and the internal stress ring 207 is prevented from sliding relative to the lower die plate 209.
As shown in fig. 9 to 14, the second set of dies 3 includes an upper die plate 201, an elongated punch 202, an arch punch 202, a second die 33, an upper stress ring 34, and a lower stress ring 35, the upper die plate 201 being connected to an upper portion of the press; the strip-shaped male die 202 and the arch-shaped male die 202 are arranged at the lower end of the lower die plate 209, a fixed base plate 36 can be arranged between the strip-shaped male die 202 and the arch-shaped male die 202 and the upper die plate 201 and is fixed with the upper die plate 201 through the fixed base plate 36, the fixed base plate 36 is fixed at the lower end of the lower die plate 209, the strip-shaped male die 202 and the arch-shaped male die 202 are arranged at the lower end of the fixed base plate 36, the second female die 33 is an assembled female die formed by a plurality of side plates 331 and a bottom plate 332, the side plates 331 and the bottom plate 332 enclose a containing cavity 333 which is vertically arranged after the blank 4 extruded by the first die 2 is overturned by 90 degrees, the strip-shaped male die 202 has the same size as the containing cavity 333, the strip-shaped male die 202 can extend into the containing cavity 333 to extrude the blank 4, the top of the containing cavity 333 is convexly provided with an arch cavity 334, the arch-shaped male die 202 has the same size as the arch cavity 334, the arch-shaped male die 202 can extend into the cavity 334, in order to save manufacturing materials of the second female die 33, the lower part of the arch cavity 334 can be arranged below the arch cavity 334 to be a hollow cavity 33, the second female die 33 can be filled with the second female die 33, the lower stress ring 33 can be fully extruded by the second die 33 and the lower stress ring 33 can be fully placed below the second cavity 33, and the second stress ring 33 can be fully placed under the lower stress ring 35, and the lower stress can be fully placed under the lower stress ring 33, and the lower stress can be fully under the lower stress 33 and the lower stress ring 33 and the lower stress can be fully placed by the lower ring 33, the second set of dies 3 is prevented from breaking due to stress overload.
The upper die plate 201 and the fixed base plate 36 are connected and fixed through the screw 5 to prevent the fixed base plate 36 from sliding relative to the upper die plate 201, the strip-shaped male die 202 and the arch male die 202 are quickly arranged at the lower end of the upper die plate 201 through the fixed base plate 36, specifically, a sliding groove 361 is formed at the lower end of the fixed base plate 36, guide rails 321 matched with the sliding groove 361 are arranged at the tops of the strip-shaped male die 202 and the arch male die 202, the guide rails 321 are clamped with the sliding groove 361 to enable the strip-shaped male die 202 and the arch male die 202 to be fixed with the fixed base plate 36, the strip-shaped male die 202 and the arch male die 202 are convenient to disassemble and assemble, the disassembly is simple and quick, the production time is saved, quick production is realized, when the size of the fixed base plate 36 is insufficient, the supplement blocks 38 can be fixed at two sides of the fixed base plate 36, the extrusion pressure is increased, and the strip-shaped male die 202 and the arch male die 202 can be prevented from sliding.
The invention relates to a multi-constraint step extrusion forming method for a large-scale anisotropic special-shaped box blank, which comprises the following specific steps:
S1, upsetting forming, namely forming a bar stock into a blank 4 through an upsetting process;
S2, preparing a first set of dies 2, namely assembling an inner stress ring 207, an outer stress ring 208, a lower die plate 209 and a top rod 211 according to the assembly relation, installing the assembled assemblies on a lower workbench of a press machine, connecting the lower die plate 209 with the lower part structure of the press machine, connecting and fixing an upper die plate 201 and a male die 202, installing the installed upper die plate 201 and the male die 202 on the upper workbench of the press machine, connecting the upper die plate 201 with the upper part structure of the press machine, preheating a first female die 206, a large cutting board 203, a small cutting board 204 and a top plate 210, and placing the first female die 206 and the top plate 210 into the inner stress ring 207 after preheating;
S3, forming in the first working procedure, namely placing the preheated blank 4 into an inner cavity 212, installing a large cutting board 203 below a male die 202, and sequentially pressing the large cutting board 203 twice, wherein the forming comprises the following steps:
The first pressing, as shown in fig. 5, the large cutting board 203 is arranged above the right part of the inner cavity 212, the press descends to drive the male die 202 to move downwards so that the large cutting board 203 presses the right part of the inner cavity 212, and the extrusion is stopped after the blank 4 is completely filled in the right part of the inner cavity 212;
The second pressing, as shown in fig. 6, the press drives the male die 202 to rise, the insert 2061 at the left front part of the first female die 206 is removed, the arc-shaped cavity 213 at the left front part of the T-shaped cavity 212 is exposed, the handle 205 is used for moving the large cutting board 203 to be above the middle part of the cavity 212, the large cutting board 203 is lowered by the lowering press to press the middle part of the cavity 212, the redundant blank 4 is moved towards the left front part of the inner cavity 212, so that the blank 4 flows to the arc-shaped cavity 213 to form a horizontal bulge 41, the height of the blank 4 at the middle part of the cavity 212 is level with the height of the blank 4 at the right part, and the blank 4 completely fills the middle part and the right part of the cavity 212;
If the heights of the middle part and the right part of the blank 4 are not flush after the two times of pressing, the handle 205 can be used for moving the large cutting board 203 to the uneven part to continue pressing until the blank 4 is extruded to be even;
After the large chopping board 203 is pressed down, the press is lifted and the large chopping board 203 is removed, the small chopping board 204 is arranged below the male die 202, as shown in fig. 7, the length of the small chopping board 204 is the same as the width of the left rear part of the inner cavity 212, the lower end of the small chopping board 204 stretches into the left rear part of the inner cavity 212, the press drives the male die 202 to descend so that the small chopping board 204 presses down the left rear part of the inner cavity 212, the height of the blank 4 at the left rear part of the inner cavity 212 is level with the heights of the blanks 4 at the middle part and the right part, and simultaneously redundant blanks 4 are extruded to the arc-shaped cavity 213 to form vertical bulges 41, namely, the blanks 4 are primarily extruded and formed;
S4, preparing a second set of dies 3, namely connecting and fixing an upper die plate 201 and a fixed base plate 36, mounting the upper die plate 201 and the fixed base plate 36 on an upper workbench of a press machine, and connecting the upper die plate 201 with the upper part structure of the press machine;
S5, the second procedure forming is carried out, namely, the blank 4 formed in the first procedure is preheated and then turned clockwise for 90 degrees, the bulge 41 of the blank is placed into the accommodating cavity 333 upwards, the strip-shaped male die 202 is arranged at the lower end of the fixed base plate 36, the press descends to drive the strip-shaped male die 202 to press down the top of the blank 4, the blank 4 fills the accommodating cavity 333 and presses the redundant blank 4 at the upper part of the accommodating cavity 333 into the arched cavity 334, the arched male die 202 is arranged at the lower end of the fixed base plate 36, the press drives the strip-shaped male die 202 and the arched male die 202 to continuously press down, the formed box body is obtained after the blank 4 is completely filled with the second female die 33, the press stops extruding, the press drives the strip-shaped male die 202 and the arched male die 202 to ascend and separate from the formed box body, the supporting block 37 and the stress ring are detached, and then the side plate 331 of the second female die 33 is detached, and the formed box body is taken out, and the formed box body is the special-shaped box body with the forward convex horizontal boss 11 at the top.
Compared with the traditional one-step extrusion forming mode, the method can effectively reduce forming load by multiple times of multi-step extrusion, adopts cutting boards with different sizes and strip-shaped male dies 202 and arch-shaped male dies 202 with different shapes to extrude blanks 4 in a distributed mode, changes the stress area of the blanks 4, can better control the metal stress state, equivalent strain quantity, plastic deformation, tissue uniformity and the like, and ensures that the forming is smoothly carried out. Meanwhile, compared with the cold extrusion technology, the hot extrusion technology is adopted, the extrusion pressure is greatly reduced, and the near net forming is ensured while the optimal comprehensive mechanical property of the material is ensured.
The present invention makes full use of the fluidity of metal, and in the second extrusion process of the large cutting board 203 in step S3, the protrusions 41 can be formed by changing the number of the inserts 2061, and then the boss 11 portion can be formed by extrusion of the elongated punch 202 and the arch punch 202 in step S5.
Compared with the traditional forming mode, the invention adopts two sets of dies, the blank 4 is extruded in a distributed manner from two plane directions through two extrusion processes, two-dimensional extrusion is converted into three-dimensional extrusion, and the special-shaped box body with the boss 11 is formed finally.
The above embodiments are only preferred embodiments of the present invention, and are not limited to the present invention, and all equivalent changes made according to the design key of the present invention fall within the protection scope of the present invention.
Claims (10)
1. A multi-constraint step extrusion forming die for a large-scale abnormal-shaped box blank is characterized by comprising a first set of dies and a second set of dies;
The first set of die comprises an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die plate, a male die, a large chopping board, a small chopping board and a handle, the upper die plate is structurally connected with the upper part of the press, the male die is fixed at the lower end of the upper die plate, the large chopping board and the small chopping board are arranged below the male die, the handle is connected with the large chopping board, the lower die assembly comprises a first female die, an internal stress ring, an external stress ring, a lower die plate, a top plate and a push rod, the lower die plate is connected with the lower part of the press, the internal stress ring is fixed on the lower die plate, the first female die and the top plate are arranged inside the internal stress ring, the first female die is arranged on the top plate, the first female die is formed by a plurality of inserts, the inserts are arranged below the male die to form a transverse T-shaped inner cavity for placing blanks, the length of the large chopping board is the same as the width of the right part and the middle part of the inner cavity, the large chopping board is enabled to move above the right part and the middle part of the inner cavity through the handle, so that the lower end of the large chopping board stretches into the inner cavity or the middle part of the inner cavity or the inner cavity of the small chopping board is enabled to stretch out of the inner cavity or the middle part of the inner cavity, the size of the inner cavity is enabled to stretch out of the inner cavity or the inner cavity of the small chopping board is matched with the left inner cavity and the inner cavity after the small cavity is extruded by the small cavity and the small cavity is matched with the size of the inner cavity;
The second set of dies comprises an upper die plate, a strip-shaped male die, an arch-shaped male die, a second female die, an upper stress ring and a lower stress ring, wherein the upper die plate is connected with the upper part of a press machine, the strip-shaped male die and the arch-shaped male die are arranged at the lower end of the lower die plate, a containing cavity for overturning a blank extruded by the first set of dies by 90 degrees and then placing the blank in the containing cavity is arranged in the second female die, the strip-shaped male die is the same as the upper part of the containing cavity in size, so that the lower end of the strip-shaped male die stretches into the containing cavity to extrude the blank, an arch-shaped cavity is convexly arranged at the top of the containing cavity, the size of the arch-shaped male die is the same as that of the arch-shaped cavity, so that the lower end of the arch-shaped male die stretches into the arch-shaped cavity to extrude the blank, the upper stress ring is sleeved on the upper part of the second female die, and the lower stress ring is sleeved on the lower part of the second female die.
2. The multi-constraint step extrusion die for a large-sized abnormal-shaped box blank according to claim 1, wherein the first die consists of five inserts, each of which comprises one insert arranged on the front, the rear and the right parts, and two inserts arranged on the left part in parallel, wherein the five inserts enclose a transverse T-shaped inner cavity, and the left front insert is taken away to enable a large chopping board and a small chopping board to press down the blank to form a T-shaped box with a bulge at the left front part.
3. The multi-constraint step extrusion die for large abnormal-shaped box blanks according to claim 1, wherein the handle is arranged on one side of the large cutting board in the length direction and is always positioned above the first female die, the internal stress ring and the external stress ring.
4. The multi-constraint step extrusion forming die for the large-scale abnormal-shaped box blank according to claim 1, wherein the upper die plate and the male die and the lower die plate and the internal stress ring are fixedly connected through screws.
5. The multi-constraint step extrusion die for large-scale abnormal-shaped box blanks according to claim 1, wherein the second die is used for extrusion forming of a T-shaped box with a horizontal boss at the top.
6. The multi-constraint step extrusion die for large-scale abnormal-shaped box blanks according to claim 5, wherein the second female die is an assembling female die and consists of a plurality of side plates and a bottom plate, and the extruded box is taken out by disassembling the side plates.
7. The multi-constraint step extrusion die for large-scale abnormal-shaped box blanks according to claim 1, wherein a fixed base plate is arranged between the strip-shaped male die and the arch-shaped male die and between the strip-shaped male die and the upper die plate, and is fixed with the upper die plate through the fixed base plate.
8. The multi-constraint step extrusion die for large-scale abnormal-shaped box blanks according to claim 7, wherein a chute is formed at the lower end of the fixed base plate, guide rails matched with the chute are arranged at the tops of the strip-shaped male die and the arch-shaped male die, and the guide rails are clamped with the chute to fix the strip-shaped male die and the arch-shaped male die with the fixed base plate.
9. The multi-constraint step extrusion die for large-scale abnormal-shaped box blanks according to claim 1, wherein the upper die plate and the fixed base plate are connected and fixed through screws.
10. A multi-constraint step extrusion molding die for large heterogeneous shaped box blanks as set forth in claim 1, wherein said second set of dies further comprises support blocks filling the lower portion of the arch-shaped cavity to support the second female die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211463246.3A CN115870360B (en) | 2022-11-17 | 2022-11-17 | A multi-constraint step-by-step extrusion die for large-scale anisotropic and shaped box blanks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211463246.3A CN115870360B (en) | 2022-11-17 | 2022-11-17 | A multi-constraint step-by-step extrusion die for large-scale anisotropic and shaped box blanks |
Publications (2)
| Publication Number | Publication Date |
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| CN115870360A CN115870360A (en) | 2023-03-31 |
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| CN112453092A (en) * | 2020-11-14 | 2021-03-09 | 中国兵器科学研究院宁波分院 | Integral extrusion forming die and method for thin-wall shell with inner ring rib |
| CN113084006A (en) * | 2021-04-02 | 2021-07-09 | 中北大学 | Step-by-step extrusion die capable of effectively reducing box forming load |
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| CN113600634B (en) * | 2021-08-04 | 2023-07-07 | 中北大学 | Extrusion forming method of cylindrical part with boss |
| CN114147162B (en) * | 2021-11-15 | 2023-10-20 | 中北大学 | Extrusion forming die for special-shaped box body with large projection area |
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| CN112453092A (en) * | 2020-11-14 | 2021-03-09 | 中国兵器科学研究院宁波分院 | Integral extrusion forming die and method for thin-wall shell with inner ring rib |
| CN113084006A (en) * | 2021-04-02 | 2021-07-09 | 中北大学 | Step-by-step extrusion die capable of effectively reducing box forming load |
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