CN113600633B - Extrusion forming die for cylindrical part with boss on appearance - Google Patents
Extrusion forming die for cylindrical part with boss on appearance Download PDFInfo
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- CN113600633B CN113600633B CN202110890374.5A CN202110890374A CN113600633B CN 113600633 B CN113600633 B CN 113600633B CN 202110890374 A CN202110890374 A CN 202110890374A CN 113600633 B CN113600633 B CN 113600633B
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- die
- lobe
- female die
- female
- boss
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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
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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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
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
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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
- B21C23/217—Tube extrusion presses
-
- 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
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/02—Removing or drawing-off work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses an extrusion forming die of a cylindrical part with a boss in appearance, which comprises a male die fixed with an upper die plate and a lower die assembly fixed with a lower die plate; the lower die assembly comprises a positioning ring, a female die assembly and a push rod, wherein the positioning ring is fixed on a lower die plate of the press, a slide way is longitudinally arranged, the female die assembly is slidably arranged in the slide way, a forming channel is longitudinally formed in the female die assembly in a penetrating mode, a plurality of layers of grooves are axially formed in the side wall of the forming channel, the push rod is inserted into the forming channel, the push rod and the forming channel are spliced into a variable forming cavity for placing blanks, the male die is downwardly slidably inserted into the variable forming cavity, and the blanks are hung on the female die assembly through the grooves to upwardly slide so as to be filled into the grooves layer by layer. The invention realizes one-step forming of the cylindrical part with the boss.
Description
Technical Field
The invention relates to the technical field of extrusion forming dies, in particular to an extrusion forming die for a cylindrical part with a boss in appearance.
Background
The cylinder part has wide application in the fields of automobile manufacturing, high-speed trains, aerospace, military industry and the like. At present, the boss forming of the cylindrical part with the boss is a technical bottleneck for plastically forming the thin-wall cylindrical part.
At present, the forming of a common cylindrical part is carried out in a plurality of modes such as machining, extrusion forming, spinning forming, casting and the like, four forming methods are mainly adopted for the cylindrical part with the boss, two forming methods are more common, one forming method is that a thick-wall circular tube is machined, a large machining allowance is reserved, redundant materials are removed, and a required boss part is reserved; the other is to prepare an outer longitudinal rib cylindrical part by extrusion forming, namely, firstly forming the whole outer rib, and then processing the outer rib into a boss by numerical control; there are also casting and liquid die forging methods.
The four methods have advantages and disadvantages respectively, the first method does not need to open a die, has high degree of freedom, can adopt numerical control operation, automatic detection and monitoring devices, is favorable for improving the stability of a workpiece, but generates a large amount of scraps in the machining process, has serious environmental pollution and higher production cost, and in addition, the geometric external shape directly machined inevitably cuts off a metal streamline at the part, damages the metal fiber structure, damages the integrity of the metal fiber structure, greatly reduces the strength of the metal fiber structure and reduces the usability of parts. The second method adopts a direct plastic forming method to replace the traditional mechanical cutting processing, so that the mechanical property of the barrel part is improved, the strength and toughness of the barrel part are improved, the production efficiency, the material utilization rate and the service performance of products are also improved, the die design is simpler, the process operability is high, the production period is shortened, and the metal longitudinal streamline is still damaged. The third method has the advantages that the application range of the casting is wide, the production cost is low, parts with complex shapes can be produced, but due to the existence of the boss, the casting has a plurality of hot spots, the tendency of shrinkage cavity shrinkage porosity defect is large, and the mechanical property of the cast product is low; the casting is easy to deform due to larger stress generated by uneven temperature field, so the mechanical property and precision of the casting are difficult to meet the requirements of high-performance parts such as aerospace, weapons and the like. The fourth liquid die forging is carried out by casting the metal in a liquid state and solidifying the metal under a certain pressure, so that a product with compact tissue structure can be obtained, and the mechanical property is higher than that of a casting, but the liquid die forging needs to restrict the metal density, needs to carry out more complex design on a male die, increases the control cost, and has lower strength than a formed piece prepared by an extrusion forming process; therefore, in general, the extrusion molding for preparing the outer longitudinal rib cylindrical part has better advantages in all aspects, and only needs machining treatment in the follow-up process, so that the axial streamline is damaged, and the material utilization rate is reduced.
At present, an extrusion forming die for a small amount of cylindrical parts with bosses in appearance is designed with a mechanism which is difficult to demould for the boss structures, such as a diagonal guide pillar core-pulling and pipe-pushing demoulding method, but in actual engineering, the subsequent machining is needed after extrusion forming, meanwhile, the forming parts and a female die are needed to be pushed out, and splitting is carried out manually to take out the forming parts, so that a die for forming the cylindrical parts with bosses in appearance at one time and a corresponding method are lacking at present.
Disclosure of Invention
The present invention has been made in view of the above problems. The invention aims to provide an extrusion forming die for a cylindrical part with a boss in appearance, which overcomes the defects and realizes one-step forming of the cylindrical part with the boss in appearance.
To achieve the above object, the solution of the present invention is: the extrusion forming die for the cylindrical part with the boss comprises an upper die plate, a lower die plate, a male die fixed with the upper die plate and a lower die assembly fixed with the lower die plate;
the lower die assembly comprises a positioning ring, a female die assembly and a push rod, wherein the positioning ring is fixed on a lower die plate and is longitudinally provided with a slide way, the female die assembly is slidably arranged in the slide way, a forming channel is longitudinally formed in the female die assembly in a penetrating mode, multiple layers of grooves are axially formed in the side wall of the forming channel, the push rod is inserted into the forming channel, the push rod and the forming channel are spliced into a variable forming cavity for placing blanks, the male die is downwardly slidably inserted into the variable forming cavity, and the blanks are hung on the female die assembly through the grooves to be upwardly slid so as to be filled into the grooves layer by layer.
Further, the die assembly comprises a left-lobe die, a right-lobe die and a pre-stress ring, the split parts of the left-lobe die and the right-lobe die are fractal surfaces, the pre-stress ring is arranged in the slideway in a sliding manner, a conical hole which is inwards retracted downwards is formed in the pre-stress ring, the outer contours of the left-lobe die and the right-lobe die are half conical surfaces matched with the conical hole, and the left-lobe die and the right-lobe die are radially movably split in the conical hole along the fractal surfaces to form the forming channel.
Further, the device also comprises a reverse triangular bolt, wherein reverse triangular holes are spliced at the fractal surface of the left-lobe female die and the right-lobe female die, the reverse triangular holes are symmetrical along the fractal surface, the longitudinal position of the reverse triangular bolt is fixed, and the reverse triangular bolt is horizontally inserted into or pulled out of the reverse triangular holes in a sliding manner.
Further, the inverted triangle bolt and the inverted triangle hole are provided in plurality and are symmetrically arranged along the axis of the forming channel.
Further, the side wall of the push rod transversely penetrates through a long groove, the upper end of the long groove is higher than the lower surfaces of the left-lobe female die and the right-lobe female die when the female die assembly slides up to the highest height, a plane pin vertically slides in the long groove and is detachably inserted in the long groove, two ends of the plane pin extend out of the long groove to support the left-lobe female die and the right-lobe female die in an upward sliding manner, and when the plane pin slides to the lower end of the long groove, the upper end of the plane pin is spaced from the lower surfaces of the left-lobe female die and the right-lobe female die.
Further, the slideway surface vertically extends to have the slideway slide rail, the prestressing force circle is provided with the cooperation the prestressing force circle spout of slideway slide rail, the downthehole vertical extension of bell mouth of prestressing force circle has the bell mouth slide rail, left side lamella die, right side lamella die are provided with respectively the cooperation left side lamella die spout, right side lamella die spout of bell mouth slide rail.
Further, the die further comprises a first hollow tube, the first hollow tube is detachably sleeved outside the male die, the upper end of the first hollow tube is abutted against the upper die plate, and the lower end of the first hollow tube is abutted against the left-lobe female die and the right-lobe female die.
Further, the device also comprises a second hollow pipe, wherein the upper part of the second hollow pipe is abutted against the upper template, and the lower part of the second hollow pipe is abutted against the prestress ring.
Further, each layer of groove at least comprises a left-lobe female die groove and a right-lobe female die groove, the left-lobe female die groove is arranged on the left-lobe female die, the right-lobe female die groove is arranged on the right-lobe female die, and after the left-lobe female die and the right-lobe female die are spliced, the left-lobe female die groove and the right-lobe female die groove on each layer of groove are separated from each other.
Further, a stripper plate for abutting the blank is covered above the lower die assembly in an opening and closing mode, a through hole corresponding to the forming channel is formed in the stripper plate, and the male die penetrates through the through hole and is downwards inserted into the variable forming cavity.
After the scheme is adopted, the beneficial effects of the invention are as follows: the lower die assembly comprises a positioning ring, a female die assembly and a push rod, wherein the positioning ring is fixed on a lower die plate, a slideway is longitudinally arranged, the female die assembly is slidably arranged in the slideway, a forming channel is longitudinally formed in the female die assembly in a penetrating manner, a plurality of layers of grooves are axially arranged on the side wall of the forming channel, the push rod is arranged in the forming channel, the push rod and the forming channel are spliced into a variable forming cavity for placing a blank, the male die is downwardly slidably inserted into the variable forming cavity, the blank is hung on the female die assembly through the grooves and is upwardly slid so as to be filled into the grooves layer by layer, the outer contour of the forming channel is set into a shape corresponding to the outer contour of a preformed cylindrical workpiece, the section of the male die is corresponding to the section of the inner wall of the preformed cylindrical workpiece, when the male die is downwardly slidably inserted into the variable forming cavity, the blank is outwardly expanded to fill the upper layer groove in the current variable forming cavity, when the male die is continuously pressed down, the blank is hung on the female die assembly to upwardly slide, the forming channel is further upwardly moved, the variable forming cavity is longitudinally inserted into the groove, the variable forming cavity is continuously extended into the cylindrical cavity, and the cylindrical cavity is continuously exposed, and the outer contour of the cylindrical cavity is continuously formed into the cylindrical cavity.
Drawings
FIG. 1 is a schematic diagram of a first hollow tube jacking left-handed female die and right-handed female die of the present invention;
FIG. 2 is a schematic view of a male die downstream extrusion billet of the present invention;
FIG. 3 is a schematic view of the die assembly of the present invention;
fig. 4 is a schematic drawing of the punch up-draw blank of the present invention;
FIG. 5 is a schematic view of a mounting planar pin of the present invention;
FIG. 6 is a schematic view of a second hollow tube lower pre-stressing ring according to the present invention;
FIG. 7 is a schematic view of a triangular latch of the present invention inserted into a triangular hole;
FIG. 8 is a schematic diagram of the left-handed die and the right-handed die of the invention separated and ejected;
FIG. 9 is a partially exploded view of the present invention;
fig. 10 is a schematic diagram of a separation structure of a left-lobe female die and a right-lobe female die of the invention.
Description of the reference numerals: 1-upper die plate, 2-male die, 3-lower die plate, 4-lower die assembly, 5-retainer ring, 6-female die assembly, 7-push rod, 8-slide, 9-forming channel, 10-groove, 11-blank, 12-variable forming cavity, 13-left-hand die, 14-right-hand die, 15-pre-stressing ring, 16-fractal surface, 17-conical bore, 18-triangular latch, 19-chamfer-triangular bore, 20-elongated slot, 21-planar pin, 22-slide rail, 23-pre-stressing ring slide slot, 24-conical bore slide rail, 25-left-hand die slide slot, 26-right-hand die slide slot, 27-first hollow tube, 28-second hollow tube, 29-left-hand die slot, 30-right-hand die slot, 31-stripper, 32-through hole, 33-lower pad, 34-upper pad, 35-countersunk screw, 36-guide slot, 37-avoidance bore, 38-rectangular bore, 39-rectangular section, 40-shoulder stop.
Detailed Description
The invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The invention relates to an extrusion forming die of a cylindrical part with a boss on the appearance, which is mainly shown in the figure 1, and comprises a male die 2 fixed with an upper die plate 1 and a lower die assembly 4 fixed with a lower die plate 3, wherein the upper die plate 1 is fixed on a press sliding block, the lower die plate 3 is fixed on a press workbench, the press sliding block moves up and down above the press workbench, the press is of the prior art, the specific structure is not described any more, so that the upper die plate 1 moves up and down above the lower die plate 3, and the male die 2 is driven to move up and down, and in the embodiment, the male die 2 is of a column shape extending vertically; the lower die assembly 4 comprises a positioning ring 5, a die assembly 6 and a push rod 7, the positioning ring 5 is fixed on the lower die plate 3, in this embodiment, the lower die plate 1 comprises a lower base plate 33 and an upper base plate 34 which are sequentially stacked in the upper direction, the positioning ring 5 is arranged above the upper base plate 34, a plurality of countersunk screws 35 sequentially penetrate through the lower die plate 1, the lower base plate 33 and the upper base plate 34 from bottom to top and are in threaded connection with the positioning ring 5, so that the die assembly is fixed, the lower base plate 33 and the upper base plate 34 support the die assembly, the positioning ring 5 is longitudinally provided with a slideway 8, the die assembly 6 is slidably arranged in the slideway 8, a forming channel 9 is longitudinally formed in a penetrating manner in the die assembly 6, a plurality of layers of grooves 10 are axially arranged on the side walls of the forming channel 9, the push rod 7 penetrates through the lower die plate 1, the lower base plate 33 and the upper base plate 34 to be inserted into the forming channel 9 from bottom to top, the push rod 7 and the forming channel 9 are spliced into a variable forming cavity 12 for placing the blank 11, the die assembly 2 is slidably inserted into the lower base plate 33, the punch assembly 10 is slidably inserted into the forming cavity 10, the corresponding layers of the grooves 11 are continuously and the grooves 11 are continuously filled with the grooves 11, and the grooves 11 are continuously filled into the grooves 11, and the grooves 11 are continuously formed by filling the grooves in the grooves, and the grooves 11.
The key combination is shown in fig. 8, the female die assembly 6 includes a left-lobe female die 13, a right-lobe female die 14, and a pre-stress ring 15, the split position of the left-lobe female die 13 and the right-lobe female die 14 is a fractal surface 16, the pre-stress ring 15 is slidably arranged in the slideway 8, in this embodiment, the slideway 8 is a vertically arranged duct, the outer contour of the pre-stress ring 15 is correspondingly matched with the slideway 8, a conical hole 17 which is downwardly and inwardly retracted is formed in the pre-stress ring 15, the outer contours of the left-lobe female die 13 and the right-lobe female die 14 are half conical surfaces matched with the conical hole 17, the left-lobe female die 13 and the right-lobe female die 14 are radially movably split along the fractal surface 16 in the conical hole 17 to form the forming channel 9, and the forming channel 9 is symmetrically arranged at two sides of the fractal surface 16.
As shown in fig. 6, 7 and 8, the device further comprises a reverse triangular bolt 18, the left concave die 13 and the right concave die 14 are spliced with a reverse triangular hole 19 at the fractal surface 16, the reverse triangular hole 19 is symmetrical along the fractal surface 16, the reverse triangular bolt 18 is fixed in longitudinal position and is horizontally slid to insert or withdraw the reverse triangular hole 19, the reverse triangular bolt 18 and the reverse triangular hole 19 are provided with a plurality of reverse triangular bolts 18 and are symmetrically arranged along the axis of the forming channel 9, in this embodiment, the side wall of the positioning ring 5 horizontally penetrates through a guide groove 36, the section of the guide groove 36 corresponds to the section of the reverse triangular bolt 18, the reverse triangular bolt 18 penetrates into the guide groove 36, the position of the triangular bolt 18 is limited by the guide groove 36, the reverse triangular bolt 18 can only horizontally slide along the guide groove 36, the pre-stress ring 15 is provided with a clearance hole 37 for the triangular bolt 18 to penetrate through, and the triangular bolt 18 further penetrates through the clearance hole 37 and horizontally slides to insert or withdraw the reverse triangular bolt 19.
With reference to fig. 7, the side wall of the push rod 7 is transversely penetrated with a long groove 20, the upper end of the long groove 20 is higher than the lower surface of the left-lobe die 13 and the right-lobe die 14 when the die assembly 6 slides up to the highest height, a plane pin 21 is vertically slidably and detachably inserted in the long groove 20, in this embodiment, one end of the plane pin 21 is provided with a shoulder 40, the width of the shoulder 40 is greater than that of the long groove 20, after the plane pin 21 is inserted into the long groove 20, the shoulder 40 abuts against the outer wall of the push rod 7, the horizontal displacement of the plane pin 21 is limited, so as to facilitate the insertion of the plane pin 21, the two ends of the plane pin 21 extend out of the long groove 20, so as to slidably support the left-lobe die 13 and the right-lobe die 14, the upper end height of the long groove 20 ensures that the plane pin 21 can be fully contacted with the lower surface of the left-lobe die 13 and the right-lobe die 14, and when the plane pin 21 slides to the lower end of the long groove 20, the upper end of the plane pin 21 is spaced from the lower surface of the left-lobe die 13 and the right-lobe die 14, so that the plane pin 21 is easier to be inserted.
With emphasis on fig. 5 and 9, the surface of the slideway 8 vertically extends to form a slideway slide rail 22, the prestress ring 15 is provided with a prestress ring slide rail 23 matched with the slideway slide rail 22, tapered hole slide rails 24 vertically extend in tapered holes 17 of the prestress ring 15, the left-lobe female die 13 and the right-lobe female die 14 are respectively provided with a left-lobe female die slide rail 25 and a right-lobe female die slide rail 26 matched with the tapered hole slide rails 24, the lower template 3 is provided with a rectangular hole 38, the push rod 7 is provided with a rectangular section 39 in sliding fit with the rectangular hole 38, and the push rod 7 is further limited to rotate around an axis, so that the circumferential positions of the positioning ring 5, the prestress ring 15, the left-lobe female die 13, the right-lobe female die 14 and the push rod 7 are limited.
As shown in fig. 1, the device further comprises a first hollow tube 27, the first hollow tube 27 is detachably sleeved outside the male die 2, the upper end of the first hollow tube is abutted against the upper die plate 1, the lower end of the first hollow tube is abutted against the left-lobe female die 13 and the right-lobe female die 14, and the left-lobe female die 13 and the right-lobe female die 14 are pressed down through the upper die plate 1 so as to be in stress fit with the conical hole 17.
As shown in fig. 6, the second hollow tube 28 is sleeved outside the male die 2, the upper part of the second hollow tube 28 abuts against the upper die plate 1, the lower part of the second hollow tube 28 abuts against the pre-stressing ring 15, and then the pre-stressing ring 15 can be pushed down by the second hollow tube 28 to separate from the left-lobe female die 13 and the right-lobe female die 14.
As shown in fig. 3, each layer of the grooves 10 includes at least one left-lobe concave groove 29 and one right-lobe concave groove 30, the left-lobe concave groove 29 is disposed on the left-lobe concave groove 13, the right-lobe concave groove 30 is disposed on the right-lobe concave groove 14, after the left-lobe concave groove 13 is spliced with the right-lobe concave groove 14, the left-lobe concave groove 29 and the right-lobe concave groove 30 on each layer of the grooves 10 are separated from each other, so that a boss structure is formed on the blank 11, but the left-lobe concave groove 29 and the right-lobe concave groove 30 are not limited to be separated from each other, and the left-lobe concave groove 29 and the right-lobe concave groove 30 may be a structure capable of being spliced into an annular groove.
As shown in fig. 3, a stripper plate 31 for abutting the blank is covered above the lower die assembly 4, a through hole 32 corresponding to the forming channel 9 is provided on the stripper plate 31, and the male die 2 is inserted into the variable forming cavity 12 downward through the through hole 32.
The extrusion molding method for forming the cylindrical part with the boss on the outer shape of the workpiece by using the extrusion molding die for the cylindrical part with the boss on the outer shape comprises the following steps:
the first step: with emphasis on being combined with fig. 1 and 2, the pre-stressing ring 15 is prepared before forming, the pre-stressing ring is dropped into the bottom of the slideway 8, the left-flap female die 13 and the right-flap female die 14 are spliced and pressed in the conical hole 17, the left-flap female die 13, the right-flap female die 14 and the conical hole 17 are self-locked, in the embodiment, a first hollow tube 27 is sleeved outside the male die 2, the first hollow tube 27 is propped against the upper part of the first hollow tube 27 by the upper die plate 1, the first hollow tube 27 is propped against the left-flap female die 13 and the right-flap female die 14, the press slide block is downwards used for driving the upper die plate 1 and the first hollow tube 27 to downwards, the left-flap female die 13 and the right-flap female die 14 are spliced and pressed in the conical hole 17, then the first hollow tube 27 is taken down, the push rod 7 and the forming channel 9 form a variable forming cavity 12, at least one layer of grooves 10 are exposed in the variable forming cavity 12, blanks 11 are placed in the variable forming cavity 12, and the male die 2 is aligned with the variable forming cavity 12 from above;
and a second step of: with particular reference to fig. 3, the forming process comprises two stages, one is that the punch 2 descends, extruding the billet 11 in the variable forming cavity 12, the billet 11 flowing to fill the current variable forming cavity 12; secondly, the male die 2 continues to be pressed down, the blank 11 flows upwards along the side wall of the forming channel 9, the blank 11 slides upwards with the female die assembly 6 hung by the groove 10, so that the variable forming cavity 12 is prolonged, the blank 11 further fills the variable forming cavity 12 exposed subsequently and the grooves 10 of each layer until the blank 11 is formed;
and a third step of: after the forming is completed, referring to fig. 4, 5, 6, 7, 8 and 10, the male die 2 is withdrawn from the variable forming cavity 12, after the male die 2 is withdrawn from the variable forming cavity 12, the push rod 7 drives the female die assembly 6 and the blank 11 to move upwards, then the plane pin 21 is inserted into the long groove 20, then the push rod 7 drives the female die assembly 6, the blank 11 and the plane pin 21 to fall down, the plane pin 21 contacts with the lower die plate 3 and slides upwards along the long groove 20 to support the left-lobe female die 13 and the right-lobe female die 14, the second hollow tube 28 is sleeved outside the male die 2 and is abutted between the upper die plate 1 and the pre-stressing ring 15, the press slider moves downwards to drive the upper die plate 1 and the second hollow tube 28 to separate the pre-stressing ring 15 from the left-lobe female die 13 and the right-lobe female die 14, the second hollow tube 28 is removed, then the left-lobe female die 13 and the right-lobe female die 14 are separated, specifically, after the pre-stress ring 15 is separated from the left concave die 13 and the right concave die 14, the inverted triangle bolt 18 is inserted into the inverted triangle hole 19 through the guide groove 36 and the avoidance hole 37, the inverted triangle bolt 18 is inserted and fixed in position, then the push rod 7 moves upwards to drive the left concave die 13, the right concave die 14 and the blank 11 to move upwards, the inverted triangle bolt 18 further separates the left concave die 13 and the right concave die 14 along the fractal surface 16 and stretches the left concave die 13 and the right concave die 14, after the left concave die 13 and the right concave die 14 are separated, the push rod 7 moves upwards to push the blank 11 out of the left concave die 13 and the right concave die 14, the processed blank 11 is taken out, then the plane pin 21 is detached from the long groove 20, the push rod 7 moves downwards and is reset, the inverted triangle bolt 18 moves upwards, the left concave die 13 and the right concave die 14 are spliced, the steps are repeated when the next blank 11 is formed, and then the time cost of opening the die and taking the piece by taking out the female die manually in the prior art is reduced, the production line efficiency is ensured, and the automatic production is realized.
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. An extrusion forming die of a cylindrical part with a boss in appearance, which is characterized in that: comprises an upper template (1), a lower template (3), a male die (2) fixed with the upper template (1) and a lower die assembly (4) fixed with the lower template (3);
the lower die assembly (4) comprises a positioning ring (5), a female die assembly (6) and a push rod (7), wherein the positioning ring (5) is fixed on a lower die plate (3) and is longitudinally provided with a slide way (8), the female die assembly (6) is slidably arranged in the slide way (8), a forming channel (9) is longitudinally formed in the female die assembly (6) in a penetrating mode, a plurality of layers of grooves (10) are axially formed in the side wall of the forming channel (9), the push rod (7) is inserted into the forming channel (9), the push rod (7) and the forming channel (9) are spliced into a variable forming cavity (12) for placing a blank (11), the male die (2) is slidably inserted into the variable forming cavity (12), and the blank (11) is hung through the grooves (10) to be upwardly slid so as to fill the grooves (10) layer by layer.
2. An extrusion die for a cylindrical member having a boss in its outer shape as set forth in claim 1, wherein: the die assembly (6) comprises a left-lobe die (13), a right-lobe die (14) and a pre-stress ring (15), the split part of the left-lobe die (13) and the right-lobe die (14) is a fractal surface (16), the pre-stress ring (15) is arranged in the slideway (8) in a sliding manner, a conical hole (17) which is downwards retracted is formed in the pre-stress ring (15), the outer contours of the left-lobe die (13) and the right-lobe die (14) are half conical surfaces matched with the conical hole (17), and the left-lobe die (13) and the right-lobe die (14) are radially movably split along the fractal surface (16) in the conical hole (17) to form the forming channel (9).
3. An extrusion die for a cylindrical member having a boss in its outer shape as set forth in claim 2, wherein: the novel three-dimensional concave die comprises a left-lobe concave die (13) and a right-lobe concave die (14), and is characterized by further comprising an inverted triangle bolt (18), wherein inverted triangle holes (19) are spliced at the fractal surface (16), the inverted triangle holes (19) are symmetrical along the fractal surface (16), the longitudinal positions of the inverted triangle bolt (18) are fixed, and the inverted triangle holes (19) are horizontally inserted or pulled out in a sliding mode.
4. An extrusion die for a cylindrical member having a boss in its outer shape as set forth in claim 3, wherein: the inverted triangle bolt (18) and the inverted triangle hole (19) are arranged in a plurality, and are symmetrically arranged along the axis of the forming channel (9).
5. An extrusion die for a cylindrical member having a boss in its outer shape as set forth in claim 2, wherein: the side wall of the push rod (7) transversely penetrates through the long groove (20), the upper end of the long groove (20) is higher than the lower surfaces of the left-lobe female die (13) and the right-lobe female die (14) when the female die assembly (6) slides up to the highest height, a plane pin (21) is vertically slid in the long groove (20) and detachably inserted into the long groove, two ends of the plane pin (21) extend out of the long groove (20) to slide upwards to support the left-lobe female die (13) and the right-lobe female die (14), and when the plane pin (21) slides to the lower end of the long groove (20), the upper ends of the plane pin (21) and the lower surfaces of the left-lobe female die (13) and the right-lobe female die (14) are separated.
6. An extrusion die for a cylindrical member having a boss in its outer shape as set forth in claim 2, wherein: slide (8) surface vertical extension has slide rail (22), prestressing force circle (15) are provided with cooperation prestressing force circle spout (23) of slide rail (22), vertical extension has bell mouth slide rail (24) in bell mouth (17) of prestressing force circle (15), left side lamella die (13), right side lamella die (14) are provided with respectively cooperation left side lamella die spout (25), right side lamella die spout (26) of bell mouth slide rail (24).
7. An extrusion die for a cylindrical member having a boss in its outer shape as set forth in claim 2, wherein: the novel male die comprises a male die (2), and is characterized by further comprising a first hollow tube (27), wherein the male die (2) is detachably sleeved with the first hollow tube (27), the upper end of the first hollow tube is abutted against the upper die plate (1), and the lower end of the first hollow tube is abutted against the left-lobe female die (13) and the right-lobe female die (14).
8. An extrusion die for a cylindrical member having a boss in its outer shape as set forth in claim 2, wherein: the device further comprises a second hollow tube (28), wherein the upper part of the second hollow tube (28) is abutted against the upper template (1), and the lower part of the second hollow tube (28) is abutted against the prestress ring (15).
9. An extrusion die for a cylindrical member having a boss in its outer shape as set forth in claim 2, wherein: each layer of groove (10) at least comprises a left-lobe female die groove (29) and a right-lobe female die groove (30), the left-lobe female die groove (29) is arranged on the left-lobe female die (13), the right-lobe female die groove (30) is arranged on the right-lobe female die (14), and after the left-lobe female die (13) and the right-lobe female die (14) are spliced, the left-lobe female die groove (29) and the right-lobe female die groove (30) on each layer of groove (10) are separated from each other.
10. An extrusion die for a cylindrical member having a boss in its outer shape as set forth in claim 1, wherein: the upper opening and closing cover of the lower die assembly (4) is provided with a stripper plate (31) for abutting the blank, the stripper plate (31) is provided with a through hole (32) corresponding to the forming channel (9), and the male die (2) is downwards inserted into the variable forming cavity (12) through the through hole (32).
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| CN202110890374.5A CN113600633B (en) | 2021-08-04 | 2021-08-04 | Extrusion forming die for cylindrical part with boss on appearance |
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| CN202110890374.5A CN113600633B (en) | 2021-08-04 | 2021-08-04 | Extrusion forming die for cylindrical part with boss on appearance |
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| CN113600633B true CN113600633B (en) | 2023-08-25 |
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| CN106363031B (en) * | 2016-09-01 | 2018-01-09 | 中北大学 | Hollow blank shapes the rotary extrusion forming method of large ratio of height to width inner ring muscle |
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| CN110586681B (en) * | 2019-10-25 | 2021-04-02 | 中北大学 | Extrusion forming die for cabin component |
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| CN113600633A (en) | 2021-11-05 |
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