CN108435913B - One-die multi-outlet cold extrusion die for extruding torsion tube of car seat - Google Patents
One-die multi-outlet cold extrusion die for extruding torsion tube of car seat Download PDFInfo
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- CN108435913B CN108435913B CN201810234671.2A CN201810234671A CN108435913B CN 108435913 B CN108435913 B CN 108435913B CN 201810234671 A CN201810234671 A CN 201810234671A CN 108435913 B CN108435913 B CN 108435913B
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- 238000000641 cold extrusion Methods 0.000 title claims abstract description 33
- 238000001125 extrusion Methods 0.000 claims abstract description 24
- 230000000712 assembly Effects 0.000 claims description 43
- 238000000429 assembly Methods 0.000 claims description 43
- 230000007246 mechanism Effects 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000007493 shaping process Methods 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a multi-die cold extrusion die for extruding and extruding torsion tubes of a car seat, which comprises an upper die assembly and a lower die assembly which are matched and used for clamping a hollow pipe fitting, a first convex hull forming assembly used for forming a first convex hull on the hollow pipe fitting to form a first workpiece, and a second convex hull forming assembly used for forming a second convex hull on the first workpiece and enabling the second convex hull and the first convex hull to clamp a connecting arm to form a second workpiece. The extrusion one-die multi-outlet cold extrusion die for the torsion tube of the car seat has the advantages of good universality, high extrusion precision, high positioning precision, good operability and the like, and can improve the production efficiency of the torsion tube of the car seat.
Description
Technical Field
The invention belongs to the technical field of dies, and particularly relates to a multi-die cold extrusion die for extruding and extruding torsion tubes of a car seat.
Background
The automobile seat is an important internal part of the automobile body, is mainly used for supporting the mass of passengers, relieving and attenuating the impact and vibration transmitted by the automobile body, and creating comfortable and safe riding conditions for the passengers. As an important component of car seats, the seat frame should have sufficient rigidity and strength for carrying and securing safety; the device also has higher precision, so that the human body has proper sitting posture, good body pressure distribution, and adjustable size and position, thereby ensuring stable and comfortable sitting, convenient operation and good visual field. The automobile seat framework piece seat round tube needs to be wrapped at two ends and is used for connecting two connecting arms at two sides, so that the size requirement is high. The traditional processing method processes the shape of the bag by a special machine tool, the processed bag cannot be connected with two adjusting arms at two sides, and the special machine tool has high price, high manufacturing cost and low production efficiency. The existing seat torsion tube cold extrusion die cannot be formed in one die, extrusion processing of a workpiece can be completed only by multiple procedures and multiple sets of dies, and production efficiency is low. In order to solve the technical problems, the technical scheme of the extrusion one-die multi-outlet cold extrusion die for the circular tube of the car seat is urgently needed.
Currently, patent document CN205571155U discloses a cold extrusion die for an automobile torsion tube, and the technical scheme selected by the cold extrusion die for an automobile torsion tube is that a convex hull is extruded first. If the whole torsion tube is required to be processed, the subsequent die set processing is required, the production efficiency is low, and the popularization and application value is low.
For example, patent document CN201799527U discloses a round tube extrusion die, and the technical scheme selected by the die relates to a round tube extrusion die capable of being used for processing a convex hull, and the die mainly uses an inclined wedge mechanism for extruding a single convex hull, is difficult to process a seat torsion tube, cannot guarantee the relative position precision of multiple convex hulls, and has low production efficiency and low popularization and application value.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a cold extrusion die for extruding and extruding a torsion tube of a car seat, and aims to improve the production efficiency.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the car seat torsion tube extrusion one-die multi-outlet cold extrusion die comprises an upper die assembly and a lower die assembly which are matched and used for clamping a hollow pipe fitting, a first convex hull forming assembly used for forming a first convex hull on the hollow pipe fitting to form a first product, and a second convex hull forming assembly used for forming a second convex hull on the first product and enabling the second convex hull and the first convex hull to clamp a connecting arm to form a second product.
The first convex hull forming assemblies are arranged in a relative mode, the second convex hull forming assemblies are arranged in a relative mode, the two first convex hull forming assemblies and the two second convex hull forming assemblies are respectively located on the same straight line parallel to the first direction, the first convex hull forming assemblies and the second convex hull forming assemblies are respectively located on the same straight line parallel to the second direction, and the first direction and the second direction are perpendicular.
The upper die assembly comprises an upper die plate and a discharging mechanism arranged on the upper die plate, the lower die assembly comprises a lower die plate parallel to the upper die plate, and the first convex hull forming assembly and the second convex hull forming assembly are positioned between the upper die plate and the lower die plate.
The upper die assembly comprises a first upper die and a second upper die, the lower die assembly comprises a first lower die matched with the first upper die and used for clamping a hollow pipe fitting and a second lower die matched with the second upper die and used for clamping a first workpiece, the first convex hull forming assembly is located on one side of the first upper die and one side of the first lower die, and the second convex hull forming assembly is located on one side of the second upper die and one side of the second lower die.
The first convex hull forming assembly comprises a first guide nail which is inserted into the hollow pipe fitting and is parallel to the first direction, and a first forming block which is sleeved on the first guide nail and is matched with the first upper concave die and the first lower concave die to form the first convex hull, wherein the formed first convex hull is clamped between the first forming block and the matched first upper concave die and the first lower concave die.
The second convex hull forming assembly comprises a second guide nail which is inserted into the first workpiece and parallel to the first direction and a second forming block which is sleeved on the second guide nail and used for forming the second convex hull, the formed second convex hull is clamped between the second forming block and the connecting arm, and the first convex hull is clamped between the connecting arm and the matched second upper concave die and second lower concave die.
The second convex hull forming assembly further comprises a second sliding plate and a second fixing plate, the second sliding plate is movably arranged along the first direction, the second fixing plate is arranged on the second sliding plate, the second forming block is arranged on the second fixing plate, and the first direction is the horizontal direction.
The car seat torsion tube extrusion one-die multi-outlet cold extrusion die further comprises a positioning assembly used for positioning the connecting arm, wherein the positioning assembly comprises a positioning seat movably arranged along a first direction, a first positioning mechanism used for positioning one end of the connecting arm and a second positioning mechanism used for positioning the other end of the connecting arm, the first positioning mechanism and the second positioning mechanism are arranged on the positioning seat, and the positioning seat is located between the second sliding plate and the second lower die.
The first positioning mechanism comprises positioning blocks arranged on the positioning seat and limiting blocks used for limiting the positioning blocks in the first direction, the positioning blocks are provided with a plurality of positioning blocks which are circumferentially distributed on the outer sides of the second guide nails, the limiting blocks are sleeved on the second forming blocks and are positioned between the positioning blocks and the second fixing plates, and the positioning seat is provided with accommodating grooves for the positioning blocks to be inserted.
The second positioning mechanism comprises a mounting block connected with the positioning seat and a positioning pin which is arranged on the mounting block and is used for being inserted into a hole formed in the end part of the connecting arm, and the axis of the positioning pin is parallel to the first direction.
The extrusion one-die multi-outlet cold extrusion die for the torsion tube of the car seat has the advantages of good universality, high extrusion precision, high positioning precision, good operability and the like, and can improve the production efficiency of the torsion tube of the car seat.
Drawings
The present specification includes the following drawings, the contents of which are respectively:
FIG. 1 is a schematic diagram of a multi-die cold extrusion die for extruding a torsion tube of a car seat;
FIG. 2 is a schematic structural view of the upper die assembly;
FIG. 3 is a schematic view of the lower die assembly;
FIG. 4 is an assembly schematic of a lower die assembly with a first convex hull forming assembly and a second convex hull forming assembly;
FIG. 5 is an assembled schematic view of a first convex hull forming assembly and a second convex hull forming assembly;
FIG. 6 is an assembled schematic view of another first convex hull forming assembly and another second convex hull forming assembly;
FIG. 7 is a schematic view of the structure of the positioning assembly;
FIG. 8 is a cross-sectional view of the positioning assembly;
FIG. 9 is a schematic view of the structure of the positioning seat;
FIG. 10 is a schematic view of a connecting arm positioning state;
FIG. 11 is a schematic structural view of an error proofing assembly;
FIG. 12 is a schematic view of the use of the first and second convex hull forming assemblies;
FIG. 13 is a schematic view of the structure of the first article;
Fig. 14 is a schematic view of the structure of the second article (torsion tube);
Fig. 15 is a schematic view of another second article (torsion tube);
Marked in the figure as:
1. A first convex hull; 2. a second convex hull; 3. a connecting arm;
4. A positioning assembly; 401. a positioning seat; 402. a positioning block; 403. a limiting block; 404. a mounting block; 405. a positioning pin; 406. a receiving groove; 407. a receiving chamber; 408. a guide pin; 409. an elastic element;
5. a drive assembly; 501. a driving block; 502. wedge slide block; 503. a guide slide seat; 504. a guide block;
6. An upper die assembly; 601. an upper template; 602. a stripper plate; 603. stripping hooks; 604. a first upper female die; 605. a second upper female die; 606. foot pads; 607. an upper positioning plate;
7. A lower die assembly; 701. a lower template; 702. a lower positioning plate; 703. foot pads; 704. a first lower female die; 705. a second lower die; 706. a third lower die;
8. A first convex hull forming assembly; 801. a first forming block; 802. a first guide pin; 803. a first sliding plate; 804. a first fixing plate;
9. a second convex hull forming assembly; 901. a second forming block; 902. a second guide pin; 903. a second sliding plate; 904. a second fixing plate;
10. a first pipe section; 11. a second pipe section; 12. a third pipe section;
13. An error-proofing block; 14. a support block; 15. and (5) briquetting.
Detailed Description
The following detailed description of the embodiments of the invention, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the invention, and to aid in its practice, by those skilled in the art.
As shown in fig. 1 to 14, the present invention provides a multi-die cold extrusion die for extruding torsion tubes of a car seat, comprising an upper die assembly 6 and a lower die assembly 7 which are matched and used for clamping a hollow pipe, a first convex hull forming assembly 8 used for forming a first convex hull on the hollow pipe to form a first product, and a second convex hull forming assembly 9 used for forming a second convex hull on the first product, and clamping a connecting arm between the second convex hull and the first convex hull to form the second product.
In particular, as an important component of automotive interiors, seats have been a key element in comfortable riding, and have received great attention. The automobile seat framework is taken as a basic framework of an automobile seat, is an automobile part directly contacted with a person, and needs to meet certain comfort and safety requirements. The cold extrusion technology has the advantages of saving materials, improving production efficiency, improving mechanical product performance and being suitable for mass production, and is widely applied to products for car seat frameworks. The cold extrusion die with one extruding die and multiple outlets for the torsion tube of the car seat provided by the invention not only can ensure strict form and position tolerance requirements of a workpiece, but also has the characteristics of easiness in implementation, easiness in popularization and the like, and has a very wide application prospect. The torsion tube is formed by processing a hollow tube with a certain length through a cold extrusion die, wherein the hollow tube is a long tube with two open ends and a hollow interior, as shown in fig. 14. The torsion tube (namely the second part) comprises a torsion tube body and two connecting arms arranged on the torsion tube body, the torsion tube body is provided with two annular first convex hulls and two annular second convex hulls, the torsion tube body is divided into a first tube section, a second tube section and a third tube section by the first convex hulls and the second convex hulls, the outer diameters of the first convex hulls and the second convex hulls are identical, the outer diameters of the first convex hulls and the second convex hulls are larger than the outer diameters of the first tube section, the second tube section and the third tube section, the outer diameters of the first tube section, the second tube section and the third tube section are identical, the first tube section, the second tube section and the third tube section are coaxially arranged with the first convex hulls and the second convex hulls, and the length of the second tube section is smaller than that of the third tube section. In the axial direction of the torsion tube body, two first convex hulls are located between two second convex hulls, a second tube section is located between two first convex hulls, two ends of the second tube section are fixedly connected with the two first convex hulls, one second convex hull is located between the first tube section and the first convex hull and is fixedly connected with the end part of the first tube section, and the other second convex hull is located between the third tube section and the first convex hull and is fixedly connected with the end part of the third tube section. The connecting arm sleeve is arranged on the torsion tube body, each connecting arm is clamped between one first convex hull and one second convex hull, each first convex hull is matched with one second convex hull to clamp the connecting arm, the connecting arm and the torsion tube body are fixedly connected, the two connecting arms are parallel in length direction and extend towards the same side of the torsion tube body, and the length direction of the connecting arm is perpendicular to the axis of the torsion tube body. The torsion tube after final forming is arranged at the joint of the seat cushion and the backrest and is used for controlling the inclination angle of the backrest.
The structure of the first product is shown in fig. 13, the first product is formed by processing a hollow pipe with a certain length through the cold extrusion die, the hollow pipe is a long circular pipe with two open ends and a hollow interior, the first product is provided with two annular first convex hulls, and the two first convex hulls divide the first product into three parts. After the first part is manufactured, the first part is continuously processed through the cold extrusion die, two second convex hulls are formed on the first part, and the second convex hulls are assembled with the two connecting arms at the same time to manufacture a second part, namely the torsion tube of the car seat. When the cold extrusion die disclosed by the invention works, the hollow pipe fitting and the first workpiece can be processed at the same time, and one first workpiece and one second workpiece are manufactured at a time, so that the production efficiency is high.
As shown in fig. 1 and 2, the upper die assembly 6 includes an upper positioning plate 607, a foot 606, an upper die plate 601, a first upper die 604, a second upper die 605, and a discharging mechanism provided on the upper die plate 601. The upper positioning plate 607 is used for being connected with a press, the upper template 601 is parallel to the upper positioning plate 607, the upper template 601 is positioned below the upper positioning plate 607, the pad 606 is arranged between the upper template 601 and the upper positioning plate 607, and the pad 606 is fixedly connected with the upper template 601 and the upper positioning plate 607. As shown in fig. 3, the lower die assembly 7 includes a lower positioning plate 702, a foot pad 703, a first lower female die 704, a second lower female die 705, and a lower die plate 701 parallel to the upper die plate 601. The lower positioning plate 702 is fixedly connected with a workbench of the press, the lower template 701 is positioned below the upper template 601, the lower positioning plate 702 is positioned below the lower template 701, the pad 703 is arranged between the lower template 701 and the lower positioning plate 702, and the pad 703 is fixedly connected with the lower template 701 and the lower positioning plate 702. As shown in fig. 4, the first convex hull forming assembly 8 and the second convex hull forming assembly 9 are located between the upper die plate 601 and the lower die plate 701, the first convex hull forming assembly 8 is matched with the first upper die 604 and the first lower die 704 to process the hollow pipe into a first product, the first upper die 604 is located right above the first lower die 704 and the first lower die 704 is matched with the first upper die 604 to clamp the hollow pipe, and the first convex hull forming assembly 8 is located on one side of the first upper die 604 and the first lower die 704; the second convex hull forming assembly 9 is matched with the second upper concave die 605 and the second lower concave die 705 to process the first workpiece into a second workpiece, the second upper concave die 605 is located above the second lower concave die 705, the second lower concave die 705 is matched with the second upper concave die 605 to clamp the first workpiece, and the second convex hull forming assembly 9 is located on one side of the second upper concave die 605 and one side of the second lower concave die 705.
As shown in fig. 4, the first convex hull forming assemblies 8 are arranged in two and two first convex hull forming assemblies 8 are arranged oppositely, the second convex hull forming assemblies 9 are arranged in two and two second convex hull forming assemblies 9 are arranged oppositely, the first convex hull forming assemblies 8 and the second convex hull forming assemblies 9 are arranged movably along the first direction, the first convex hull forming assemblies 8 and the second convex hull forming assemblies 9 are also arranged movably along the second direction, the two first convex hull forming assemblies 8 and the two second convex hull forming assemblies 9 are respectively positioned on the same straight line parallel to the first direction, each first convex hull forming assembly 8 is respectively positioned on the same straight line parallel to the second direction with one second convex hull forming assembly 9, and the first direction and the second direction are perpendicular. The first direction and the second direction are both horizontal directions, the first direction is parallel to the length direction of the upper and lower templates 601 and 701, and the second direction is parallel to the width direction of the upper and lower templates 601 and 701. The first lower concave dies 704 are arranged in two, the first upper concave dies 604 are arranged in two, the two first lower concave dies 704 are positioned between the two first convex hull forming assemblies 8, each first upper concave die 604 is positioned right above one first lower concave die 704, the two first lower concave dies 704 and the two first upper concave dies 604 are symmetrically arranged, and the two first convex hull forming assemblies 8 are symmetrically arranged. For two first convex hull forming assemblies 8, one first convex hull forming assembly 8 is matched with one first upper concave die 604 and one first lower concave die 704, one first convex hull is formed at one end of the hollow pipe fitting, and the other first convex hull forming assembly 8 is matched with one first upper concave die 604 and one first lower concave die 704, and the other first convex hull is formed at the other end of the hollow pipe fitting. The two second lower dies 705 are arranged, the two second upper dies 605 are arranged, the two second lower dies 705 are positioned between the two second convex hull forming assemblies 9, each second upper die 605 is positioned right above one second lower die 705, the two second lower dies 705 and the two second upper dies 605 are symmetrically arranged, and the two second convex hull forming assemblies 9 are symmetrically arranged. For two second convex hull forming assemblies 9, one second convex hull forming assembly 9 is matched with a second upper concave die 605 and a second lower concave die 705, a second convex hull is formed at one end of a first workpiece, the first convex hull and the second convex hull clamp connecting arms, the other second convex hull forming assembly 9 is matched with the second upper concave die 605 and the second lower concave die 705, the other second convex hull is formed at the other end of the first workpiece, and the first convex hull and the second convex hull clamp the other connecting arms, so that a second workpiece is finally formed.
The upper die of the upper die assembly 6 is matched with the lower die of the lower die assembly 7, and is mainly used for clamping the hollow pipe fitting, and is matched with the convex hull forming assembly to form a convex hull on the hollow pipe fitting. The first upper die 604 and the second upper die 605 are disposed on the discharge mechanism, the first lower die 704 and the second lower die 705 are disposed on the third lower die 706, and the third lower die 706 is disposed on the lower die plate 701. Preferably, the upper die plate 601 and the lower die plate 701 are horizontally arranged, two third lower dies 706 are arranged on the lower die plate 701, the two third lower dies 706 are sequentially arranged along the length direction of the lower die plate 701, a first lower die 704 and a second lower die 705 are fixedly arranged on each third lower die 706, each first lower die 704 and one second lower die 705 are respectively positioned on the same straight line parallel to the second direction, the two first lower dies 704 and the two second lower dies 705 are respectively positioned on the same straight line parallel to the first direction, and the first convex closure forming assembly 8 and the two first lower dies 704, and the second convex closure forming assembly 9 and the two second lower dies 705 are respectively positioned on the same straight line. The first upper die 604, the second upper die 605, the first lower die 704 and the second lower die 705 all have semicircular holes with the same pore size, the semicircular holes of the first upper die 604 and the semicircular holes of the first lower die 704 are spliced together to form a complete round hole for accommodating the hollow pipe, and the semicircular holes of the second upper die 605 and the semicircular holes of the second lower die 705 are spliced together to form a complete round hole for accommodating the first workpiece. The first lower die 704 is located below the first upper die 604, and the second lower die 705 is located below the second upper die 605, so that the hollow pipe and the first workpiece can be horizontally placed during processing, and feeding and discharging are facilitated. During processing, the first upper die 604 moves downwards to press the hollow pipe onto the first lower die 704, the hollow pipe is clamped, the two first convex hull forming assemblies 8 move along the horizontal direction and are matched with the two first upper dies 604 and the first lower die 704, and finally, two annular first convex hulls are pressed on the hollow pipe to form a first workpiece. Simultaneously, the second upper die 605 moves downwards to press the first workpiece onto the second lower die 705, the first workpiece is clamped, the two second convex hull forming assemblies 9 move along the horizontal direction and are matched with the two second upper dies 605 and the second lower die 705, and finally, two annular second convex hulls are pressed on the first workpiece to form the second workpiece.
As shown in fig. 1 and 2, the discharging mechanism of the upper die assembly 6 includes a stripper plate 602 and a stripper hook 603. The stripper plate 602 is located the below of cope match-plate pattern 601 and both parallels, and stripper plate 602 is connected with last locating plate 607 through the nitrogen spring that sets up perpendicularly, and cope match-plate pattern 601 is equipped with the through-hole that lets the nitrogen spring pass. The stripping hook 603 is vertically arranged on the bottom surface of the upper template 601, the upper end of the stripping hook 603 is fixedly connected with the upper template 601, and the lower end is of an L-shaped structure for hooking the stripper plate 602. When the upper positioning plate 607 drives the upper template 601 to move upwards, the stripper plate 602 is pulled upwards by the stripper hook 603, so that the upper female die on the stripper plate 602 is separated from the workpiece.
As shown in fig. 4 to 6, the first convex hull forming assembly 8 includes a first sliding plate 803 movably disposed, a first fixing plate 804 disposed on the first sliding plate 803, a first guide pin 802 for being inserted into the hollow pipe and parallel to the first direction, and a first forming block 801 sleeved on the first guide pin 802 and for being matched with the first upper concave die 604 and the first lower concave die 704 to form a first convex hull, and the formed first convex hull is sandwiched between the first forming block 801 and the matched first upper concave die 604 and the first lower concave die 704. The first fixing plate 804 is fixedly connected to the first sliding plate 803, and the first forming block 801 is disposed on the first fixing plate 804. In the process of forming the first convex hull on the hollow pipe, the first sliding plate 803 moves linearly along the first direction, at this time, the axis of the hollow pipe is parallel to the first direction, and the first sliding plate 803 moves while driving the first fixing plate 804, the first forming block 801 and the first guide pin 802 to move linearly along the first direction at the same time, and move towards the direction close to the first lower concave die 704, so as to squeeze the hollow pipe. The first guide pin 802 is used for being inserted into a central hole of the hollow pipe fitting, the first guide pin 802 is contacted with the end face of the hollow pipe fitting so as to play a limiting role on the hollow pipe fitting in the first direction, and the first guide pin 802 is provided with a step surface contacted with the end face of the hollow pipe fitting. The first forming block 801 is sleeved on the first guide pin 802, and the first forming block 801 is used for being matched with the first upper female die 604 and the first lower female die 704 to form a circular first convex hull on the hollow pipe fitting. The first upper die 604 and the first lower die 704 cooperate to clamp the hollow pipe on the one hand and to interact with the first forming block 801 on the other hand, the formed first convex hull is sandwiched between the first forming block 801 and the cooperating first upper die 604 and first lower die 704, the end face of the first forming block 801 is in contact with one side face of the first convex hull, and the end faces of the cooperating first upper die 604 and first lower die 704 are in contact with the other side face of the first convex hull.
As shown in fig. 4 to 6, the first guide pin 802 has a cylindrical structure, the first guide pin 802 has a large diameter section and a small diameter section, the diameter of the large diameter section is larger than the diameter of the small diameter section, the diameter of the small diameter section is not larger than the inner diameter of the hollow pipe, the diameter of the large diameter section is larger than the inner diameter of the hollow pipe, and the length of the large diameter section is smaller than the length of the small diameter section. The first forming block 801 is a cylinder with two open ends and a hollow inside, the first forming block 801 is sleeved on the first guiding pin 802, the inner diameter of the first forming block 801 is the same as the outer diameter of the large-diameter section of the first guiding pin 802, the first forming block 801 and the first guiding pin 802 are coaxially arranged with the first lower concave die 704, the axes of the first forming block 801 and the first guiding pin 802 are parallel to the first direction, one part of the first guiding pin 802 is positioned in the hollow cavity of the first forming block 801, the other part of the first guiding pin 802 extends out of the first forming block 801 from one end opening of the first forming block 801, the extending part of the first guiding pin 802 is used for being inserted into the center hole of the hollow pipe fitting, the extending part of the first guiding pin 802 is one part of the small-diameter section of the first guiding pin 802, and the other part of the small-diameter section of the first guiding pin 802 is positioned in the hollow cavity of the first forming block 801, and a gap is formed between the small-diameter section of the first guiding pin and the inner circle forming block 801. The other end opening of the first shaping block 801 is closed by a first fixing plate 804, the first shaping block 801 is inserted into the inside of the first fixing plate 804, and the first fixing plate 804 has a hollow inner cavity accommodating the first shaping block 801. Through the cooperation of first shaping piece 801 and first guide pin 802, the torsion tubular product flow of being convenient for in the extrusion process, the shaping of easily first convex closure, the axiality requirement of each part of first finished piece after easily guaranteeing first convex closure formation. And in the process of forming the first convex hulls on the hollow pipe fitting, the two first convex hull forming assemblies 8 work simultaneously, and the two first lower concave dies 704 are respectively matched with the first upper concave die 604 so as to clamp the hollow pipe fitting at one end of the hollow pipe fitting respectively and are matched with the two first convex hull forming assemblies 8, and the two first convex hull forming assemblies 8 do opposite movement and form two first convex hulls simultaneously, so that the forming effect and the production efficiency of a workpiece can be improved, and the product quality is improved.
As shown in fig. 4 to 8, the second convex hull forming assembly 9 includes a second sliding plate 903 movably disposed along a first direction, a second fixing plate 904 disposed on the second sliding plate 903, a second guide pin 902 for being inserted into the first article and parallel to the first direction, and a second forming block 901 sleeved on the second guide pin 902 for forming a second convex hull, wherein the formed second convex hull is sandwiched between the second forming block 901 and the connecting arm, and the first convex hull is sandwiched between the connecting arm and the second upper die 605 and the second lower die 705 that are matched. The second fixing plate 904 is fixedly connected with the second sliding plate 903, the second forming block 901 is arranged on the second fixing plate 904, the first sliding plate 803 and the second sliding plate 903 are arranged side by side, and each first sliding plate 803 and one second sliding plate 903 are respectively positioned on the same straight line parallel to the second direction. In the process of forming the second convex hull on the first workpiece, two connecting arms are firstly installed on the first workpiece, at this time, the axis of the first workpiece is parallel to the first direction, then the second sliding plate 903 moves linearly along the first direction, and the second sliding plate 903 moves while driving the second fixing plate 904, the second forming block 901 and the second guide nail 902 to move linearly along the first direction and move towards the direction close to the second lower die 705 so as to squeeze the first workpiece. The second guide pin 902 is for insertion into a central hole of the first article, the second guide pin 902 contacts an end surface of the first article to limit the first article in the first direction, and the second guide pin 902 has a stepped surface contacting the end surface of the first article. The second forming block 901 is sleeved on the second guide pin 902, and the second forming block 901 is used for being matched with the second upper die 605 and the second lower die 705 to form a circular second convex hull on the first workpiece. The second upper die 605 and the second lower die 705 are matched, on one hand, the first workpiece is clamped, on the other hand, the second upper die 605 and the second lower die 705 are acted with the second forming block 901, the formed second convex hull is clamped between the second forming block 901 and the connecting arm, the connecting arm is clamped between the first convex hull and the matched first upper die 604 and the first lower die 704, the end face of the second forming block 901 is contacted with one side face of the second convex hull, the connecting arm is contacted with the other side face of the second convex hull, the end face of the matched first upper die 604 and the first lower die 704 is contacted with one side face of the first convex hull, the connecting arm is contacted with the other side face of the first convex hull, the first convex hull and the formed second convex hull are clamped with the connecting arm, the fixing of the connecting arm is realized, and the second workpiece is formed.
As shown in fig. 4 to 8, the first guide pin 802 and the second guide pin 902 have substantially the same structure, the second guide pin 902 has a cylindrical structure, the second guide pin 902 has a large diameter section and a small diameter section, the diameter of the large diameter section is larger than that of the small diameter section, the diameter of the small diameter section is not larger than the inner diameter of the hollow pipe, the diameter of the large diameter section is larger than the inner diameter of the hollow pipe, and the length of the large diameter section is smaller than the length of the small diameter section. The first forming block 801 and the second forming block 901 are basically the same in structure, the second forming block 901 is a cylinder with two open ends and hollow inside, the second forming block 901 is sleeved on the second pilot pin 902, the inner diameter of the second forming block 901 is the same as the outer diameter of a large-diameter section of the second pilot pin 902, the second forming block 901 and the second pilot pin 902 are coaxially arranged with the second lower die 705, the axes of the second forming block 901 and the second pilot pin 902 are parallel to the first direction, one part of the second pilot pin 902 is positioned in a hollow cavity of the second forming block 901, the other part of the second pilot pin 902 extends out of the second forming block 901 from one end opening of the second forming block 901, the extending part of the second pilot pin 902 is used for being inserted into a center hole of a first workpiece, the extending part of the small-diameter section of the second pilot pin 902, the other part of the second pilot pin 902 is positioned in a gap between the small-diameter section of the second pilot pin 902 and the hollow cavity of the second pilot pin 901, and the other part of the second pilot pin 902 is positioned in the hollow cavity of the second pilot pin 901. The other end opening of the second molding block 901 is closed by a second fixing plate 904, the second molding block 901 is inserted into the inside of the second fixing plate 904, and the second fixing plate 904 has a hollow inner cavity accommodating the second molding block 901. The first fixing plate 804, the second fixing plate 904, the first forming block 801, the second forming block 901, the first guide nail 802 and the second guide nail 902 are respectively positioned on the same straight line parallel to the second direction, and the second forming block 901 and the second guide nail 902 are matched, so that the torsion tube material flows in the extrusion process conveniently, the forming of the second convex hull is easy, and the coaxiality requirement of each part of the second workpiece after the second convex hull is formed is easy to be ensured. And in the process of forming the second convex hulls on the first workpiece, the two second convex hull forming assemblies 9 work simultaneously, the two second lower concave dies 705 are respectively matched with the second upper concave die 605 so as to respectively clamp the hollow pipe fitting at one end of the hollow pipe fitting and are matched with the two second convex hull forming assemblies 9, and the two second convex hull forming assemblies 9 do opposite movement and form two second convex hulls simultaneously, so that the workpiece forming effect and the production efficiency can be improved, and the product quality is improved.
As shown in fig. 4, 5 and 12, the multi-die cold extrusion die for extruding torsion tubes of car seats of the present invention further comprises a driving component 5, wherein the driving component 5 is used for controlling the first convex hull forming component 8 and the second convex hull forming component 9 to reciprocate in a linear motion along a first direction, the driving components 5 are arranged in two and the two driving components 5 are symmetrically arranged, and each driving component 5 is respectively connected with a first convex hull forming component 8 and a second convex hull forming component 9. In the process of forming the first convex hull and the second convex hull, the two driving assemblies 5 simultaneously control the two first convex hull forming assemblies 8 and the two second convex hull forming assemblies 9 to simultaneously form the two first convex hulls on the hollow pipe fitting and the two second convex hulls on the first workpiece and complete the assembly of the two connecting arms, so that the forming effect and the production efficiency of the workpiece can be improved, and the product quality can be improved. The driving assembly 5 is a wedge mechanism, and the driving assembly 5 comprises a guide sliding seat 503 movably arranged on the lower template 701, a wedge sliding block 502 arranged on the guide sliding seat 503 and a driving block 501 matched with the wedge sliding block 502 and used for driving the wedge sliding block 502 to do linear motion along a first direction, wherein the driving block 501 is fixedly connected with the upper template 601 below the upper template 601. The slide wedge slide block 502 is fixedly connected with the slide guiding seat 503, the first convex hull forming assembly 8 and the second convex hull forming assembly 9 are connected with the slide wedge slide block 502, the first sliding plate 803 and the second sliding plate 903 are arranged on the slide guiding seat 503, when the upper die plate 601 drives the driving block 501 to press down, the driving block 501 pushes the slide wedge slide block 502 and the slide guiding seat 503 to move towards the direction close to the first lower concave die 704 and the second lower concave die 705, the slide wedge slide block 502 simultaneously drives the first convex hull forming assembly 8 and the second convex hull forming assembly 9 to move along the first direction, and finally the first forming block 801 is matched with the first upper concave die 604 and the first lower concave die 704, and the second forming block 901 is matched with the second upper concave die 605 and the second lower concave die 705 respectively, so that the first convex hull is formed on the hollow pipe fitting and the second convex hull is formed on the first workpiece.
As shown in fig. 4, 5 and 12, the guide sliding seat 503 is movably disposed on the top surface of the lower template 701, the first sliding plate 803 and the second sliding plate 903 are movably disposed on the top surface of the guide sliding seat 503, and the first sliding plate 803 and the second sliding plate 903 are disposed so as to be movable along the second direction relative to the guide sliding seat 503 and the cam sliding block 502, and the cam sliding block 502 is fixedly disposed on the top surface of the guide sliding seat 503. The driving assembly 5 further comprises two guide blocks 504, the first sliding plate 803 is connected with the cam slider 502 through one guide block 504, the second sliding plate 903 is connected with the cam slider 502 through the other guide block 504, the two guide blocks 504 are positioned on the same straight line parallel to the second direction, the guide blocks 504 are installed by being inserted into sliding grooves formed in the cam slider 502, the installation holes are of a block structure with a convex cross section, correspondingly, a T-shaped sliding groove which accommodates the guide blocks 504 and extends along the second direction is formed in the cam slider 502, the length direction of the T-shaped sliding groove is perpendicular to the first direction, openings are formed on three sides of the cam slider 502, wherein the openings on two opposite sides are used for allowing the guide blocks 504 to enter and exit, and the openings on the other side are used for allowing the guide blocks 504 to extend out, so that the two guide blocks 504 can be fixedly connected with the first sliding plate 803 and the second sliding plate 803 respectively. Through set up T type groove and guide block 504 on slide wedge slider 502 and cooperate for first convex closure shaping subassembly 8 and second convex closure shaping subassembly 9 are played spacing effect to first convex closure shaping subassembly 8 and second convex closure shaping subassembly 9 on guide slide 503 along the in-process that the second direction removed, ensure that first convex closure shaping subassembly 8 and second convex closure shaping subassembly 9 do rectilinear motion, thereby conveniently go up the unloading.
The driving assembly 5 further comprises a reset mechanism for resetting the cam slider 502, the reset mechanism comprises a reset spring connected with the cam slider 502, the reset spring is a nitrogen spring, the reset spring is arranged along the horizontal direction and is connected with the guide slide seat 503, and the reset spring is used for applying a driving force for driving the guide slide seat 503 to linearly move towards a direction away from the first lower concave die 704 and the second lower concave die 705.
As shown in fig. 4, 8-10, the car seat torsion tube extrusion one-die multi-outlet cold extrusion die of the invention further comprises a positioning component 4 for positioning the connecting arm, the locating component 4 is arranged on the second convex hull forming component 9, and the locating component 4 can synchronously move with the second convex hull forming component 9, so that the accuracy of the positions of the connecting arms in the process of forming the convex hulls is ensured, and the coaxiality of the two connecting arms is ensured. The positioning components 4 are arranged in two, each positioning component 4 is used for positioning one connecting arm, the two positioning components 4 are positioned on the same straight line parallel to the first direction, the two positioning components 4 are symmetrically arranged, and the two positioning components 4 are respectively arranged on one second convex hull forming component 9. The connecting arm is positioned by arranging the positioning assembly 4, so that the forming effect and the production efficiency of the workpiece can be improved, and the product quality is improved. And the positioning component 4 is arranged on the second convex hull forming component 9, so that the structure is compact, the arrangement is convenient, and the size of the die is reduced. The positioning assembly 4 comprises a positioning seat 401 movably arranged along a first direction, a first positioning mechanism for positioning one end of the connecting arm and a second positioning mechanism for positioning the other end of the connecting arm, wherein the first positioning mechanism and the second positioning mechanism are arranged on the positioning seat 401, and the positioning seat 401 is positioned between the second sliding plate 903 and the second lower die 705. After the first part is placed on the second lower die 705, the two connecting arms are respectively installed on one positioning component 4, and the first positioning mechanism and the second positioning mechanism of the positioning component 4 are matched to realize the positioning of the connecting arms. In the process of forming the second convex hulls, the second convex hull forming assembly 9 drives the positioning assembly 4 and the connecting arms on the positioning assembly to synchronously move towards the direction close to the second lower die 705, so that the two connecting arms can be sleeved on the first workpiece, two second convex hulls are finally formed, and each connecting arm is clamped and fixed by a first convex hull and a second convex hull respectively.
As shown in fig. 4 and fig. 8 to fig. 10, the first positioning mechanism includes a positioning block 402 disposed on a positioning seat 401 and a limiting block 403 for limiting the positioning block 402 in a first direction, the positioning block 402 is disposed in plurality, all positioning blocks 402 are distributed along a circumferential direction outside the second guide nail 902, the limiting block 403 is sleeved on the second forming block 901, the limiting block 403 is disposed between the positioning block 402 and the second fixing plate 904, and the positioning seat 401 has a receiving groove 406 into which the positioning block 402 is inserted. The end of the connecting arm is provided with a through hole for the first workpiece to be inserted, the through hole is a round hole, and the positioning block 402 is arranged to enable the through hole arranged at the end of the connecting arm and the first workpiece to be in a coaxial state, so that the position accuracy of the connecting arm is ensured. All positioning blocks 402 are distributed around the end of the connecting arm, at least one positioning block 402 is positioned below the connecting arm, and the positioning blocks 402 provide supporting and positioning functions for the connecting arm. In the first direction, the positioning seat 401 is located between the second slide plate 903 and the second lower die 705. The positioning seat 401 is internally provided with a containing cavity 407 for containing the second fixing plate 904 and the second forming block 901, the containing cavity 407 is a cylindrical cavity, and the containing cavity 407 is arranged on the positioning seat 401 in a penetrating way along a first direction, so that a first workpiece can be inserted into the second forming block 901 through an opening at the end part of the positioning seat 401, the containing cavity 407 is coaxial with the second forming block 901, one end of the second fixing plate 904 is inserted into the containing cavity 407, and the other end of the second fixing plate 904 is fixedly connected with the second sliding plate 903. The accommodating groove 406 is a groove extending from the end surface of the positioning seat 401 facing the second lower die 705 towards the inside of the positioning seat 401, the length direction of the accommodating groove 406 is parallel to the first direction, the limiting block 403 is fixedly arranged in the hollow inner cavity of the positioning seat 401, the limiting block 403 is of a circular ring structure, the limiting block 403 and the second forming block 901 are coaxially arranged, the limiting block 403 is used for limiting the positioning block 402 in the first direction, one end of the positioning block 402 extends out of the positioning seat 401 to be in contact with the connecting arm, the other end of the positioning block 402 is positioned in the accommodating groove 406, and the end of the positioning block 402 is in contact with the limiting block 403.
As shown in fig. 4 and fig. 8 to fig. 10, in the present embodiment, three positioning blocks 402 are provided, and three positioning blocks 402 are circumferentially distributed with the axis of the accommodating cavity 407 as the center line, and the included angle between two adjacent positioning blocks 402 is 90 degrees.
As shown in fig. 4 and 8 to 10, the second positioning mechanism includes a mounting block 404 connected to the positioning seat 401, and a positioning pin 405 provided on the mounting block 404 for insertion into a hole provided in an end portion of the connecting arm, the axis of the positioning pin 405 being parallel to the first direction. The mounting block 404 is fixedly arranged on the positioning seat 401, the mounting block 404 extends towards the outer side of the positioning seat 401 along the second direction, the positioning pin 405 is fixedly arranged on the mounting block 404, and the axis of the positioning pin 405 is parallel to the axis of the accommodating cavity 407. When the connecting arm is positioned, the connecting arm is placed on one side of the positioning seat 401, one end of the connecting arm is placed in the middle of all positioning blocks 402, and the other end of the connecting arm is sleeved on the positioning pin 405, so that the accurate positioning of the connecting arm is realized.
As shown in fig. 4 and 8 to 10, the positioning assembly 4 further includes a guide pin 408 disposed on the positioning seat 401 and used for guiding the positioning seat 401, and an elastic element 409 disposed between the positioning seat 401 and the second sliding plate 903, the second sliding plate 903 has a guide hole for inserting the guide pin 408, the axis of the guide pin 408 is parallel to the first direction, the guide pin 408 is plural, the guide pin 408 is fixedly connected with the positioning seat 401, and the guide pin 408 is matched with the guide hole disposed on the second sliding plate 903, so as to ensure that the positioning seat 401 can perform a linear motion along the first direction relative to the second convex hull forming assembly 9. The elastic element 409 is a cylindrical coil spring and is a compression spring, one end of the elastic element 409 abuts against the positioning seat 401, the other end of the elastic element 409 abuts against the second sliding plate 903, the axis of the elastic element 409 is parallel to the first direction, and the elastic element 409 applies an elastic force to the positioning seat 401 to move in a direction away from the second sliding plate 903. The elastic elements 409 are provided in plurality, the elastic elements 409 are distributed on opposite sides of the second fixing plate 904, and the same number of elastic elements 409 are arranged on opposite sides of the second fixing plate 904. The elastic element 409 is provided, and is used for exerting pressure on the positioning seat 401 when extruding the convex hull, and on the other hand plays the material removing role after the extrusion is completed, so that the quick material removing is facilitated, and the efficiency is improved.
As shown in fig. 4 and 11, the extruding and extruding one-die-multiple-outlet cold extrusion die for the torsion tube of the car seat further comprises error proofing components for playing an error proofing role, so that the error proofing components can be prevented from being installed in the direction of the hollow tube, two error proofing components are arranged on the same straight line parallel to the first direction, the two error proofing components are symmetrically arranged, and the error proofing components are connected with the upper die component 6 and the lower die component 7. The error proofing assembly comprises a supporting block 14 fixedly arranged, an error proofing block 13 rotatably arranged on the supporting block 14 and a pressing block 15 arranged on the upper die assembly 6 and positioned above the supporting block 14, wherein the pressing block 15 is fixedly connected with a stripper 602, the pressing block 15 is positioned below the stripper 602, the error proofing block 13 is rotationally connected with the supporting block 14, the rotation center line of the error proofing block 13 is parallel to the first direction, the error proofing block 13 can rotate up and down, and the pressing block 15 is used for applying downward pressure to the error proofing block 13. The supporting shoe 14 is fixedly arranged on the lower die assembly 7, the error proofing block 13 is positioned between the first lower concave die 704 and the first sliding plate 803, the error proofing block 13 is rotationally connected with the supporting shoe 14 at a position between two ends, the length direction of the error proofing block 13 is perpendicular to the first direction, one end of the error proofing block 13 in the length direction is a stress end used for being in contact with the pressing block 15, the other end of the error proofing block 13 in the length direction is an error proofing end used for playing an error proofing role, the stress end of the error proofing block 13 is positioned below the pressing block 15, and the error proofing end of the error proofing block 13 is positioned between the first lower concave die 704 and the first sliding plate 803. The hollow pipe fitting is made of a hollow pipe fitting, and the hollow pipe fitting is made of a hollow pipe fitting with a certain length. When the error-proofing assembly is in an initial state, the error-proofing blocks 13 are in a horizontal state, at the moment, the length direction of the error-proofing blocks 13 is parallel to the second direction, and if the hollow pipe fitting can be placed between the error-proofing ends of the two error-proofing blocks 13, the length of the hollow pipe fitting meets the requirements. In the process of forming the boss, as the upper die assembly 6 is pressed down, the stripper 602 drives the pressing block 15 to move downwards, the pressing block 15 contacts with the stress end of the error proofing block 13 and applies downward pressure to the error proofing block 13, so that the error proofing block 13 rotates, the stress end of the error proofing block 13 moves downwards, and the error proofing end of the error proofing block 13 moves upwards, so that the first convex hull forming assembly 8 is avoided, and the movement of the first convex hull forming assembly is prevented from being influenced. The vertical distance between the stress end of the error-proofing block 13 and the rotation center line of the error-proofing block 13 is greater than the vertical distance between the error-proofing end of the error-proofing block 13 and the rotation center line of the error-proofing block 13, and the center of the error-proofing block 13 is located between the rotation center line of the error-proofing block 13 and the error-proofing end, so that after the processing is finished, the upper die assembly 6 ascends, the pressing block 15 is separated from the error-proofing block 13, and the error-proofing block 13 can automatically recover to a horizontal state.
In addition, the first lower female die, the second lower female die and the third lower female die are detachably connected, the first lower female die and the second lower female die are replaceable, and the first lower female die and the second lower female die are of various types with different lengths and sizes so as to be suitable for manufacturing torsion tubes with different convex hull positions, and therefore the universality of the die is improved. Correspondingly, the first upper female die and the second upper female die are detachably connected with the stripper, the first upper female die and the second upper female die are replaceable, the first upper female die and the second upper female die are of various types with different lengths, the first upper female die is identical to the first lower female die in length, and the second upper female die is identical to the second lower female die in length. The cold extrusion die can be suitable for manufacturing two car seat torsion tubes with different shapes by replacing the upper die and the lower die, one die is more, two connecting arms 3 of the car seat torsion tube shown in fig. 14 are symmetrically arranged, and the two connecting arms 3 of the car seat torsion tube with the structure shown in fig. 15 are different in structure.
The sedan seat torsion tube extrusion one-die multi-outlet cold extrusion die can produce two sedan seat torsion tube parts with connecting arms in two procedures through the related basic structure of the common die. By changing the relative male die and the relative female die, the two torsion pipe fittings with two working procedures can be conveniently produced, and the universality is good; the extrusion precision requirement of the convex hulls is met and the shape and position precision of the convex hulls are obtained through reasonable design and arrangement of the convex and concave die structures, so that the extrusion precision is high; the positioning assembly assists the convex hull forming assembly, so that the installation requirement of the connecting arm is met, the radial angle position precision of the connecting arm is obtained, and the positioning precision is high; the movable convex hull forming assembly is arranged, so that the installation of the workpiece taking piece and the connecting arm is facilitated, and the error prevention assembly is arranged, so that the torsion tube can be prevented from being damaged by the die due to the fact that the torsion tube is installed in an error manner, and the operability is good. In conclusion, the die has the characteristics of good universality, high extrusion precision, high positioning precision, good operability and the like.
The invention is described above by way of example with reference to the accompanying drawings. It will be clear that the invention is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present invention; or the invention is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the invention.
Claims (5)
1. The utility model provides a car seat torsion pipe crowded protruding one mould goes out cold extrusion mould more, including the last mould subassembly and the lower mould subassembly that cooperate and be used for pressing from both sides tight hollow pipe fitting, its characterized in that: the first convex hull forming assembly is used for forming a first convex hull on the hollow pipe fitting to form a first product, and the second convex hull forming assembly is used for forming a second convex hull on the first product and clamping the second convex hull and the first convex hull to form a second product;
The upper die assembly comprises a first upper female die and a second upper female die, the lower die assembly comprises a first lower female die matched with the first upper female die and used for clamping a hollow pipe fitting and a second lower female die matched with the second upper female die and used for clamping a first workpiece, the first convex hull forming assembly is positioned on one side of the first upper female die and one side of the first lower female die, and the second convex hull forming assembly is positioned on one side of the second upper female die and one side of the second lower female die;
The first convex hull forming assembly comprises a first guide nail which is used for being inserted into the hollow pipe fitting and is parallel to the first direction, and a first forming block which is sleeved on the first guide nail and is used for being matched with the first upper concave die and the first lower concave die to form the first convex hull, and the formed first convex hull is clamped between the first forming block and the matched first upper concave die and first lower concave die;
The second convex hull forming assembly comprises a second guide nail which is used for being inserted into the first workpiece and is parallel to the first direction, and a second forming block which is sleeved on the second guide nail and is used for forming the second convex hull, the formed second convex hull is clamped between the second forming block and the connecting arm, and the first convex hull is clamped between the connecting arm and the matched second upper concave die and second lower concave die;
the second convex hull forming assembly further comprises a second sliding plate and a second fixed plate, the second sliding plate is movably arranged along the first direction, the second fixed plate is arranged on the second sliding plate, the second forming block is arranged on the second fixed plate, and the first direction is the horizontal direction;
The car seat torsion tube extrusion one-die multi-outlet cold extrusion die further comprises a positioning assembly used for positioning the connecting arm, wherein the positioning assembly comprises a positioning seat movably arranged along a first direction, a first positioning mechanism used for positioning one end of the connecting arm and a second positioning mechanism used for positioning the other end of the connecting arm, the first positioning mechanism and the second positioning mechanism are arranged on the positioning seat, and the positioning seat is positioned between the second sliding plate and the second lower die;
The first positioning mechanism comprises positioning blocks arranged on the positioning seat and limiting blocks used for limiting the positioning blocks in a first direction, the positioning blocks are provided with a plurality of positioning blocks which are distributed along the circumferential direction outside the second guide nails, the limiting blocks are sleeved on the second forming blocks and are positioned between the positioning blocks and the second fixing plate, and the positioning seat is provided with a containing groove for the positioning blocks to be inserted;
The car seat torsion tube extrusion one-die multi-outlet cold extrusion die further comprises a driving assembly, wherein the driving assembly is used for controlling the first convex hull forming assembly and the second convex hull forming assembly to do reciprocating linear motion along a first direction;
The first convex hull forming assemblies are arranged in two and are oppositely arranged, and the second convex hull forming assemblies are arranged in two and are oppositely arranged;
For two second convex hull forming assemblies, one second convex hull forming assembly is matched with a second upper concave die and a second lower concave die, one second convex hull is formed at one end of a first workpiece, the first convex hull and the second convex hull clamp connecting arms, the other second convex hull forming assembly is matched with a second upper concave die and a second lower concave die, the other second convex hull is formed at the other end of the first workpiece, and the first convex hull and the second convex hull clamp the other connecting arms to finally form the second workpiece.
2. The car seat torsion tube extrusion one-die multi-outlet cold extrusion die as set forth in claim 1, wherein: the two first convex hull forming assemblies and the two second convex hull forming assemblies are respectively positioned on the same straight line parallel to the first direction, each first convex hull forming assembly is respectively positioned on the same straight line parallel to the second direction with one second convex hull forming assembly, and the first direction is perpendicular to the second direction.
3. The car seat torsion tube extrusion one-die multi-outlet cold extrusion die according to claim 1 or 2, wherein: the upper die assembly comprises an upper die plate and a discharging mechanism arranged on the upper die plate, the lower die assembly comprises a lower die plate parallel to the upper die plate, and the first convex hull forming assembly and the second convex hull forming assembly are positioned between the upper die plate and the lower die plate.
4. The car seat torsion tube extrusion one-die multi-outlet cold extrusion die as set forth in claim 1, wherein: the second positioning mechanism comprises a mounting block connected with the positioning seat and a positioning pin which is arranged on the mounting block and is used for being inserted into a hole formed in the end part of the connecting arm, and the axis of the positioning pin is parallel to the first direction.
5. The car seat torsion tube extrusion one-die multi-outlet cold extrusion die as set forth in claim 1, wherein: the driving assemblies are symmetrically arranged, and each driving assembly is respectively connected with a first convex hull forming assembly and a second convex hull forming assembly; in the process of forming the first convex hull and the second convex hull, the two driving assemblies simultaneously control the two first convex hull forming assemblies and the two second convex hull forming assemblies to simultaneously work so as to simultaneously form the two first convex hulls on the hollow pipe fitting and the two second convex hulls on the first part and complete the assembly of the two connecting arms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810234671.2A CN108435913B (en) | 2018-03-21 | 2018-03-21 | One-die multi-outlet cold extrusion die for extruding torsion tube of car seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810234671.2A CN108435913B (en) | 2018-03-21 | 2018-03-21 | One-die multi-outlet cold extrusion die for extruding torsion tube of car seat |
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| CN108435913B true CN108435913B (en) | 2024-05-31 |
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| CN109530507B (en) * | 2018-12-25 | 2020-04-28 | 重庆亿普机电有限公司 | Part forming equipment |
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| JP2009082930A (en) * | 2007-09-27 | 2009-04-23 | Hayashi Tekkosho:Kk | Method and apparatus for forming tubular material |
| DE102009037854A1 (en) * | 2009-08-18 | 2011-02-24 | Erwin A. Lang Gmbh & Co. Kg | Pressing tool for use in molding press that forms door of passenger car, has coupling device provided at blank holder for controlling relative movement of holder, down holding device and formed part during lifting of die plate from punch |
| CN105598294A (en) * | 2016-02-24 | 2016-05-25 | 河海大学文天学院 | Cold extrusion die for torque tube of passenger car seat |
| CN105642724A (en) * | 2016-01-31 | 2016-06-08 | 佛山光腾新能源股份有限公司 | Boss molding process for pipe |
| CN207059114U (en) * | 2017-08-10 | 2018-03-02 | 宁海宏德模塑有限公司 | A kind of automobile silencing pipe shaping mould |
| CN208019275U (en) * | 2018-03-21 | 2018-10-30 | 河海大学文天学院 | A kind of two process cold extrusion die of car seat torque tube |
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2018
- 2018-03-21 CN CN201810234671.2A patent/CN108435913B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009082930A (en) * | 2007-09-27 | 2009-04-23 | Hayashi Tekkosho:Kk | Method and apparatus for forming tubular material |
| DE102009037854A1 (en) * | 2009-08-18 | 2011-02-24 | Erwin A. Lang Gmbh & Co. Kg | Pressing tool for use in molding press that forms door of passenger car, has coupling device provided at blank holder for controlling relative movement of holder, down holding device and formed part during lifting of die plate from punch |
| CN105642724A (en) * | 2016-01-31 | 2016-06-08 | 佛山光腾新能源股份有限公司 | Boss molding process for pipe |
| CN105598294A (en) * | 2016-02-24 | 2016-05-25 | 河海大学文天学院 | Cold extrusion die for torque tube of passenger car seat |
| CN207059114U (en) * | 2017-08-10 | 2018-03-02 | 宁海宏德模塑有限公司 | A kind of automobile silencing pipe shaping mould |
| CN208019275U (en) * | 2018-03-21 | 2018-10-30 | 河海大学文天学院 | A kind of two process cold extrusion die of car seat torque tube |
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