CN111496090B - Rim forming die and method - Google Patents
Rim forming die and method Download PDFInfo
- Publication number
- CN111496090B CN111496090B CN202010343565.5A CN202010343565A CN111496090B CN 111496090 B CN111496090 B CN 111496090B CN 202010343565 A CN202010343565 A CN 202010343565A CN 111496090 B CN111496090 B CN 111496090B
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- die
- upper die
- lower die
- cylinder
- insert
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 98
- 238000007493 shaping process Methods 0.000 claims description 98
- 229910052757 nitrogen Inorganic materials 0.000 claims description 49
- 238000009434 installation Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 10
- 238000001125 extrusion Methods 0.000 description 6
- 229910000712 Boron steel Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 241000446313 Lamella Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- 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
- B21D53/26—Making other particular articles wheels or the like
- B21D53/30—Making other particular articles wheels or the like wheel rims
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a rim forming die and a method, wherein the rim forming die comprises an upper die and a lower die, and the upper die is arranged above the lower die; the upper die comprises an upper die bottom plate, an upper die forming insert and an upper die guide part, and the upper die guide part is fixedly arranged at the center of the lower end face of the upper die bottom plate; the lower die comprises a lower die bottom plate, a lower die outer forming insert, a lower die inner forming insert and a lower die mounting component, and the lower die mounting component is fixedly arranged at the center of the upper end surface of the lower die bottom plate; the working method of the rim forming die completes the forming of the rim through a plurality of steps. The rim forming die is used for forming the raw material steel ring by a one-step forming method to obtain the rim, and the formed rim is higher in strength and lighter in weight, and can greatly reduce the weight of the whole vehicle when being applied to large trucks and trucks with more tires, so that the energy and the oil are saved.
Description
Technical Field
The present disclosure relates to a mold, and more particularly, to a mold and a method for forming a rim.
Background
A rim is a component on a wheel for supporting a tire. At present, the existing rim is manufactured by a traditional processing mode, and the rim is manufactured by cutting off the residual materials of a raw material billet through dozens of working procedures; the rim produced by the traditional processing mode has lower tensile strength, and the thickness of the rim needs to be thickened to ensure the strength of the rim; because the large trucks and the large trucks are provided with a plurality of tires, the large trucks and the large trucks which use rims produced in the traditional processing mode have heavier weight, and are not beneficial to energy conservation and oil conservation.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides a rim forming die and a rim forming method.
In order to solve the technical problems, the invention adopts the following technical scheme: a rim forming die comprises an upper die and a lower die, wherein the upper die is arranged above the lower die;
the upper die comprises an upper die bottom plate, an upper die forming insert and an upper die guide part, and the upper die guide part is fixedly arranged at the center of the lower end face of the upper die bottom plate; the upper die mounting part is movably sleeved on the upper die guide part and can slide up and down along the upper die guide part; the upper die forming insert is sleeved on the upper die mounting component; an upper die nitrogen cylinder is fixedly arranged on the lower end surface of the upper die bottom plate, and the output end of a plug rod of the upper die nitrogen cylinder is fixedly connected with an upper die forming insert; an upper die driving block is arranged at the outer edge of the lower end surface of the upper die bottom plate;
the lower die comprises a lower die bottom plate, a lower die outer forming insert, a lower die inner forming insert and a lower die mounting component, and the lower die mounting component is fixedly arranged at the center of the upper end surface of the lower die bottom plate; the lower die inner forming insert is sleeved on the lower die mounting component; the lower die outer forming insert is slidably arranged on the lower die bottom plate, and the lower die outer forming insert is arranged on the outer side of the lower die inner forming insert; the outer side of the lower die outer forming insert is fixedly provided with a lower die driving block matched with the upper die driving block.
The upper die forming insert comprises an upper die insert A, an upper die shaping block and an upper die insert B which are arranged from top to bottom, and the upper die insert A and the upper die insert B are fixedly connected with an upper die mounting component; the upper die shaping block is connected with the output end of a piston rod of an upper die cylinder, the upper die cylinder is fixedly arranged on the upper die mounting component, and the upper die shaping block can move inside and outside along the horizontal direction.
Further, the lower die inner forming insert comprises a lower die insert and a lower die shaping block, the lower die insert is fixedly arranged on the upper part of the lower die mounting part, and the lower die shaping block is sleeved on the lower die mounting part; the lower die shaping block is connected with the output end of a piston rod of the lower die cylinder;
The lower part of the lower die mounting part is provided with a lower die nitrogen cylinder, and the plug rod output end of the lower die nitrogen cylinder is fixedly connected with the lower die outer forming insert.
Further, a cooling pipeline is arranged in the lower die outer forming insert.
Further, an upper die cylinder placing hole is formed in the upper die mounting component, and the upper die cylinder is fixedly arranged in the upper die cylinder placing hole;
further, the bottom end of the upper die guide part is provided with a limit table; an open slot corresponding to the position of the upper die cylinder is formed in the side wall of the upper die guide part, and the upper die cylinder and the upper die guide part cannot interfere when the upper die installation part moves relative to the upper die guide part.
Further, a lower die mounting upright post is fixedly arranged at the center of the upper end surface of the lower die bottom plate, and a lower die mounting part is sleeved on the outer side of the lower die mounting upright post; the lower die cylinder and the lower die nitrogen cylinder are respectively fixedly arranged at the upper part and the lower part of the lower die mounting upright post;
A lower die cylinder placing hole corresponding to the position of the lower die cylinder is formed in the middle of the lower die mounting component, and the output end of a piston rod of the lower die cylinder is fixedly connected with the lower die shaping block after the lower die cylinder passes through the lower die cylinder placing hole;
The lower part of the lower die mounting part is provided with a lower die nitrogen cylinder placing hole corresponding to the position of the lower die nitrogen cylinder, and the plug rod output end of the lower die nitrogen cylinder is fixedly connected with the lower die outer forming insert after passing through the lower die nitrogen cylinder placing hole.
Further, the lower outer die forming insert is of a multi-flap structure, and the multi-flap lower outer die forming insert is arranged in a surrounding mode by taking the axis of the lower die mounting part as the center.
Further, the upper die shaping block is of a multi-petal structure, and the multi-petal upper die shaping block is arranged in a surrounding manner by taking the axis of the upper die guide part as the center;
The lower die shaping block is of a multi-petal structure, and the multi-petal lower die shaping block is arranged in a surrounding mode by taking the axis of the lower die installation part as the center.
The working method of the rim forming die comprises the following steps:
a. Initial state:
Cooling water is introduced into a cooling pipe in the lower die outer forming insert, and the upper die and the lower die are in a separated state; the upper die nitrogen cylinder plug rod of the upper die is in an ejection state, so that the output end of the plug rod is positioned at the maximum stroke position, the upper die mounting part slides to the bottommost end of the upper die guide part, and the upper die forming insert is positioned at the bottommost end of the upper die guide part along with the upper die mounting part; the piston rod of the upper die cylinder is retracted to enable the output end of the piston rod to be in a zero stroke position, so that the upper die shaping block is in a pulled-back state;
The nitrogen cylinder plug rod of the lower die is in an ejection state, so that the output end of the plug rod is positioned at the maximum stroke position, and the outer forming insert of the lower die is in a sliding-out state; the piston rod of the lower die cylinder is retracted to enable the output end of the piston rod to be in a zero stroke position, so that the lower die shaping block is in a pulled-back state;
b. Placing a blank and closing the die:
placing the unshaped steel ring into a lower die, wherein the unshaped steel ring is sleeved outside the lower die inner forming insert and positioned inside the lower die outer forming insert;
the upper die starts to descend, the upper die forming insert descends along with the upper die, and when the lower surface of the upper die mounting part is contacted with the upper surface of the lower die mounting part, the wedge surface of the upper die driving block is just contacted with the wedge surface of the lower die driving block;
c. shaping:
the upper die bottom plate continues to move downwards, and the lower surface of the upper die mounting part is contacted with the upper surface of the lower die mounting part in the step b, so that the upper die mounting part does not move any more, and the upper die forming insert arranged on the upper die mounting part does not move in the vertical direction; the upper die guide part is inserted into the inner side of the lower die installation part along with the downward movement of the upper die bottom plate, at the moment, the plug rod output end of the upper die nitrogen cylinder is compressed back, and meanwhile, the upper die driving block downwards presses the die driving block so as to drive the lower die outer forming insert to move inwards along the horizontal direction until the horizontal stroke of the lower die outer forming insert is completely finished, at the moment, the upper die bottom plate is not moved any more, and the lower die outer forming insert, the upper die forming insert and the lower die inner forming insert are matched together to extrude and form an unshaped steel ring;
In the process that the upper die bottom plate continues to descend, the upper die shaping block and the lower die shaping block respectively move outwards to eject under the driving action of the upper die cylinder and the lower die cylinder and are matched with the lower die outer shaping insert to extrude and shape the steel ring; when the upper die bottom plate does not move any more, the upper die shaping block and the lower die shaping block also move outwards just to reach the stroke end of the upper die shaping block, so that the integral shaping of the part is realized to obtain a rim;
d. And (3) returning and taking:
After the rim is formed, the upper die bottom plate moves upwards, the compression amount of the plug rod of the upper die nitrogen cylinder starts to decrease, the upper die bottom plate drives the upper die driving block to move upwards, the pressure of the upper die driving block on the lower die driving block is reduced, the compression amount of the plug rod of the lower die nitrogen cylinder starts to decrease, and the plug rod of the lower die nitrogen cylinder extends outwards to push the lower die outer forming insert to move along the outer side of the horizontal direction;
The upper die shaping block and the lower die shaping block are respectively moved inwards and retracted under the driving action of an upper die cylinder and a lower die cylinder; the upper die bottom plate continues to ascend, and when the lower die outer forming insert moves to the limit position along the outer side of the horizontal direction, the upper die shaping block and the lower die shaping block also just move inwards to retract to the limit position;
And the upper die bottom plate continues to ascend to realize the separation of the upper die and the lower die, and then the rim formed in the lower die is taken out.
The rim forming die is used for forming the raw material steel ring by a one-step forming method to obtain the rim, and the formed rim is higher in strength and lighter in weight, and can greatly reduce the weight of the whole vehicle when being applied to large trucks and trucks with more tires, so that the energy and the oil are saved.
Drawings
Fig. 1 is a schematic structural view of a rim forming die of the present invention.
Fig. 2 is a schematic view of the state of the unformed steel ring in the lower die.
Fig. 3 is a schematic diagram showing a state in which the rim forming mold is clamped.
Fig. 4 is a side view of fig. 3.
Fig. 5 is a schematic structural view of the upper die.
Fig. 6 is a side view of fig. 5.
Fig. 7 is a bottom view of fig. 5.
Fig. 8 is a schematic view of the positional relationship of the upper die forming insert on the upper die mounting member.
Fig. 9 is a schematic view of the structure of the upper die forming insert.
Fig. 10 is a bottom view of fig. 9.
Fig. 11 is a schematic diagram of the positional relationship between the upper die cylinder and the upper die shaping block.
Fig. 12 is a bottom view of fig. 11.
Fig. 13 is a schematic structural view of the upper die mounting member.
Fig. 14 is a side view of fig. 13.
Fig. 15 is a schematic view showing the positional relationship between the upper die attachment member and the upper die guide member in the initial state.
Fig. 16 is a schematic view showing the positional relationship between the upper die mounting member and the upper die guide member in the forming process.
Fig. 17 is a schematic view of the structure of the lower die.
Fig. 18 is a schematic view showing the positional relationship of the lower outer mold insert on the lower die bottom plate in the initial state.
Fig. 19 is a top view of fig. 18.
Fig. 20 is a schematic view showing the state where the lower outer die forming insert is retracted and closed during the forming process.
Fig. 21 is a side view of fig. 20.
Fig. 22 is a top view of fig. 20.
Fig. 23 is a schematic view showing the positional relationship of the lower die mounting member on the lower die bottom plate.
Fig. 24 is a top view of fig. 23.
Fig. 25 is a schematic diagram showing the positional relationship of the lower die shaping block on the lower die mounting member.
Fig. 26 is a top view of fig. 25.
Fig. 27 is a schematic view of the structure of the lower die mounting member.
Fig. 28 is a side view of fig. 27.
Fig. 29 is a schematic diagram showing the positional relationship of the lower die cylinder and the lower die nitrogen cylinder on the lower die mounting post.
Fig. 30 is a side view of fig. 29.
Fig. 31 is a schematic structural view of a raw steel rim.
Fig. 32 is a schematic view of the structure of the rim after forming.
In the figure: 1. an upper die; 2. a lower die; 3. a raw material steel ring; 4. a rim;
11. an upper die bottom plate; 12. forming an insert by an upper die; 13. an upper die guide member; 14. a nitrogen cylinder of the upper die; 15. an upper die driving block; 16. upper die mounting part
121. An upper die insert A; 122. an upper die insert B; 123. an upper die shaping block; 124. an upper die cylinder; 125. an upper die cylinder placing hole;
131. A limiting table; 132. an open slot;
21. a lower die bottom plate; 22. forming an insert outside a lower die; 23. forming an insert in a lower die; 24. a lower die mounting member; 25. a lower die nitrogen cylinder; 26. a nitrogen cylinder placing hole of the lower die; 27. a chute; 28. a slide block; 29. the lower die is provided with an upright post;
231. A lower die insert; 232. a lower die shaping block; 233. a lower die cylinder; 234. the lower die cylinder is provided with a hole.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in figures 1-4, the rim forming die comprises an upper die 1 and a lower die 2, wherein the upper die 1 is arranged above the lower die 2, the rim is manufactured by a one-step forming method, and an unformed raw material steel ring is placed into the lower die and is subjected to one-step extrusion forming through the cooperation of the upper die and the lower die to obtain the rim.
As shown in fig. 5 to 7, the upper die 1 comprises an upper die bottom plate 11, an upper die forming insert 12 and an upper die guide member 13, wherein the upper die guide member 13 is fixedly arranged at the center of the lower end surface of the upper die bottom plate 11; the upper die mounting member 16 is movably sleeved on the upper die guiding member 13 and can slide up and down along the upper die guiding member, and the upper die guiding member plays a role in guiding the sliding of the upper die mounting member.
As shown in fig. 8 to 14, the upper die forming insert 12 is sleeved on the upper die mounting part 16, and the upper die forming insert performs extrusion forming on the upper side of the inner wall of the raw steel ring; the upper die forming insert 12 comprises an upper die insert A121, an upper die shaping block 123 and an upper die insert B122 which are arranged from top to bottom, and the upper die insert A121 and the upper die insert B122 are fixedly connected with an upper die mounting part; because the upper die insert A and the upper die insert B are fixedly connected with the upper die mounting component, and the upper die shaping block is arranged between the upper die insert A and the upper die insert B, the upper die shaping insert and the upper die mounting component cannot move relatively in the vertical direction.
The upper shaping block 123 is connected with the output end of the piston rod of the upper shaping cylinder 124, the upper shaping cylinder 124 is fixedly arranged on an upper shaping mounting component, an upper shaping cylinder placing hole 125 is formed in the upper shaping mounting component, the upper shaping cylinder is fixedly arranged in the upper shaping cylinder placing hole 125, and the upper shaping block 123 can move inside and outside along the horizontal direction. The upper die shaping block 123 has a multi-segment structure, and is arranged around the axis of the upper die guide member 13, and the multi-segment upper die shaping block moves inward and retracts and is enclosed together under the driving action of the upper die cylinder.
As shown in fig. 15 and 16, a limiting table 131 is arranged at the bottom end of the upper die guiding member 13; an open slot 132 corresponding to the position of the upper die cylinder is formed in the side wall of the upper die guide member 13, and the open slot 132 is provided so that the upper die cylinder and the upper die guide member do not interfere with each other when the upper die mounting member moves relative to the upper die guide member.
An upper die nitrogen cylinder 14 is fixedly arranged on the lower end surface of the upper die bottom plate 11, and the output end of a plug rod of the upper die nitrogen cylinder 14 is fixedly connected with the upper die forming insert 12; an upper die driving block 15 is arranged at the outer edge of the lower end surface of the upper die bottom plate 11.
As shown in fig. 17 to 22, the lower die 2 includes a lower die bottom plate 21, a lower die outer forming insert 22, a lower die inner forming insert 23, and a lower die mounting member 24, the lower die mounting member 24 being fixedly provided at the center of the upper end face of the lower die bottom plate 21; the lower die inner forming insert 23 is sleeved on the lower die mounting part 24; the lower outer die forming insert 22 is slidably arranged on the lower die bottom plate 21, and the lower outer die forming insert 22 is arranged outside the lower inner die forming insert 23; the lower die outer forming insert performs extrusion forming on the outer wall of the raw material steel ring, and the lower die inner forming insert performs extrusion forming on the lower side of the inner wall of the raw material steel ring; a lower die driving block 210 matched with the upper die driving block is fixedly arranged on the outer side of the lower die outer forming insert 22.
As shown in fig. 23 to 26, the lower in-mold forming insert 23 includes a lower mold insert 231 and a lower mold shaping block 232, the lower mold insert 231 is fixedly disposed on the upper portion of the lower mold mounting member 24, and the lower mold shaping block 232 is sleeved on the lower mold mounting member 24; the lower die shaping block 232 is connected with the output end of a piston rod of the lower die cylinder 233;
A lower die nitrogen cylinder 25 is arranged at the lower part of the lower die mounting part 24, and the plug rod output end of the lower die nitrogen cylinder 25 is fixedly connected with the lower die outer forming insert 22.
As shown in fig. 29 and 30, a lower die mounting upright post 29 is fixedly arranged at the center of the upper end surface of the lower die bottom plate, and the lower die mounting member 24 is sleeved outside the lower die mounting upright post 29; the lower die cylinder and the lower die nitrogen cylinder are respectively fixedly arranged at the upper part and the lower part of the lower die mounting upright post;
a lower die cylinder placing hole 234 corresponding to the position of the lower die cylinder is formed in the middle of the lower die mounting part 24, and the output end of a piston rod of the lower die cylinder is fixedly connected with the lower die shaping block after the lower die cylinder passes through the lower die cylinder placing hole; the lower die shaping block 232 has a multi-segment structure, and is disposed around the axis of the lower die mounting member 24, and the multi-segment lower die shaping block is retracted to the inner side by the driving of the lower die cylinder and then is enclosed together. The bottom end fixing of the lower die outer shaping insert 22 is provided with a sliding block 28, the upper end face of the lower die bottom plate 21 is provided with a sliding groove 27 matched with the sliding block 28, and the matched arrangement of the sliding groove of the sliding block plays a guiding role on the movement of the lower die outer shaping insert, so that the movement of the lower die outer shaping insert is not deviated. The outer shaping inserts of lower mould of many lamella structures is more convenient to the steel ring shaping, and the steel ring is put into the lower mould and is taken out from the lower mould after the shaping all more convenient, easy.
The lower part of the lower die mounting part 24 is provided with a lower die nitrogen cylinder placing hole 26 corresponding to the position of the lower die nitrogen cylinder, and the plug rod output end of the lower die nitrogen cylinder is fixedly connected with the lower die outer forming insert after passing through the lower die nitrogen cylinder placing hole. The lower die outer shaping insert 22 has a multi-split structure, is arranged around the axis of the lower die mounting member 24, and is retracted inward by the downward pressure of the upper die driving block to be enclosed together, and is matched with the upper die shaping insert and the lower die inner shaping insert to perform extrusion shaping on the unshaped steel ring.
The raw material steel ring for forming the rim is made of boron steel, and the tensile strength of the boron steel can be greatly improved when the raw material steel ring is rapidly cooled after being heated due to the characteristics of the boron steel.
The working method of the rim forming die comprises the steps of heating the boron steel ring to more than 900 ℃ and putting the boron steel ring into the rim forming die for forming; the cooling pipeline is arranged in the lower die outer forming insert 22 to rapidly cool the steel ring, so that the cooling rate is higher than 30 ℃/s, the tensile strength of the formed rim is improved instantaneously, the thickness of the rim formed by the method can be reduced due to the higher tensile strength, the weight of the rim is reduced, and the rim formed by the method is lighter and has higher strength and hardness due to the fact that large trucks and large trucks generally have more tires.
The working method of the rim forming die comprises the following steps:
a. Initial state:
Placing the lower die on a workbench, mounting the upper die on a press, and driving the upper die to move up and down through the press; cooling water is introduced into a cooling pipe in the lower die outer forming insert to cool the lower die outer forming insert, so that the cooling rate of the rim in the forming process can be ensured, the tensile strength of the rim can be improved, the temperature of the lower die outer forming insert can be kept constant, and the deformation of the lower die outer forming insert caused by overheating is prevented from influencing the forming of the rim;
the upper die and the lower die in the initial state are in a separated state; the upper die nitrogen cylinder plug rod of the upper die is in an ejection state, so that the output end of the plug rod is positioned at the maximum stroke position, the upper die installation part slides to the bottommost end of the upper die guide part, the upper die installation part is limited by the limiting table at the lower end of the upper die guide part, and the upper die forming insert is positioned at the bottommost end of the upper die guide part along with the upper die installation part; the piston rod of the upper die cylinder is retracted to enable the output end of the piston rod to be in a zero stroke position, so that the upper die shaping block is in a pulled-back state;
The nitrogen cylinder plug rod of the lower die is in an ejection state, so that the output end of the plug rod is positioned at the maximum stroke position, and the outer forming insert of the lower die is in a sliding-out state; the piston rod of the lower die cylinder is retracted to enable the output end of the piston rod to be in a zero stroke position, so that the lower die shaping block is in a pulled-back state;
b. Placing a blank and closing the die:
placing the unshaped steel ring into a lower die, wherein the unshaped steel ring is sleeved outside the lower die inner forming insert and positioned inside the lower die outer forming insert;
the press drives the upper die to start descending, the upper die forming insert descends along with the upper die, and when the lower surface of the upper die mounting part is contacted with the upper surface of the lower die mounting part, the wedge surface of the upper die driving block is just contacted with the wedge surface of the lower die driving block;
c. shaping:
The press machine continuously drives the upper die bottom plate to move downwards, and the lower surface of the upper die mounting part is contacted with the upper surface of the lower die mounting part in the step b, so that the upper die mounting part does not move any more, and an upper die forming insert arranged on the upper die mounting part does not move any more in the vertical direction; the upper die guide part is continuously moved downwards along with the upper die bottom plate under the pressure action of the press machine and inserted into the inner side of the lower die installation part, at the moment, the plug rod output end of the upper die nitrogen cylinder is compressed back, and meanwhile, the upper die driving block downwards presses the die driving block so as to drive the lower die outer forming insert to move inwards along the horizontal direction until the horizontal stroke of the lower die outer forming insert is completely finished, namely, the multi-petal lower die outer forming inserts are enclosed together, at the moment, the upper die bottom plate is not moved any more, and the lower die outer forming insert, the upper die forming insert and the lower die inner forming insert are matched together to carry out extrusion forming on the unshaped steel ring;
In the process that the press machine drives the upper die bottom plate to continue descending, the upper die shaping block and the lower die shaping block respectively move outwards to eject under the driving action of the upper die cylinder and the lower die cylinder and are matched with the lower die outer shaping insert to extrude and shape the steel ring; when the upper die bottom plate does not move any more, the upper die shaping block and the lower die shaping block also move outwards just to reach the stroke end of the upper die shaping block, so that the integral shaping of the part is realized to obtain a rim;
d. And (3) returning and taking:
after the rim is formed, the press machine drives the upper die bottom plate to ascend, the compression amount of the plug rod of the upper die nitrogen cylinder starts to decrease, the upper die bottom plate drives the upper die driving block to move upwards, the pressure of the upper die driving block on the lower die driving block is reduced, the compression amount of the plug rod of the lower die nitrogen cylinder starts to decrease, and the plug rod of the lower die nitrogen cylinder extends outwards to push the lower die outer forming insert to move along the outer side in the horizontal direction;
The upper die shaping block and the lower die shaping block are respectively moved inwards and retracted under the driving action of an upper die cylinder and a lower die cylinder; the upper die bottom plate continues to ascend, and when the lower die outer forming insert moves to the limit position along the outer side of the horizontal direction, the upper die shaping block and the lower die shaping block also just move inwards to retract to the limit position;
The press machine continuously drives the upper die bottom plate to ascend, the separation of the upper die and the lower die is realized, and then the rim formed in the lower die is taken out.
The rim forming die is used for forming the raw material steel ring by a one-step forming method to obtain the rim, and the formed rim is higher in strength and lighter in weight, and can greatly reduce the weight of the whole vehicle when being applied to large trucks and trucks with more tires, so that the energy and the oil are saved.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, but is also intended to be limited to the following claims.
Claims (7)
1. The utility model provides a rim forming die which characterized in that: comprises an upper die (1) and a lower die (2), wherein the upper die (1) is arranged above the lower die (2);
The upper die (1) comprises an upper die bottom plate (11), an upper die forming insert (12) and an upper die guide component (13), wherein the upper die guide component (13) is fixedly arranged at the center of the lower end face of the upper die bottom plate (11); the upper die mounting part (16) is movably sleeved on the upper die guide part (13) and can slide up and down along the upper die guide part; the upper die forming insert (12) is sleeved on the upper die mounting component (16); an upper die nitrogen cylinder (14) is fixedly arranged on the lower end surface of the upper die bottom plate (11), and the output end of a plug rod of the upper die nitrogen cylinder (14) is fixedly connected with an upper die forming insert (12); an upper die driving block (15) is arranged at the outer edge of the lower end surface of the upper die bottom plate (11);
The lower die (2) comprises a lower die bottom plate (21), a lower die outer forming insert (22), a lower die inner forming insert (23) and a lower die mounting component (24), wherein the lower die mounting component (24) is fixedly arranged at the center of the upper end face of the lower die bottom plate (21); the lower die inner forming insert (23) is sleeved on the lower die mounting component (24); the lower outer die forming insert (22) is slidably arranged on the lower die bottom plate (21), and the lower outer die forming insert (22) is arranged outside the lower inner die forming insert (23); a lower die driving block (210) matched with the upper die driving block is fixedly arranged on the outer side of the lower die outer forming insert (22);
The upper die forming insert (12) comprises an upper die insert A (121), an upper die shaping block (123) and an upper die insert B (122) which are arranged from top to bottom, and the upper die insert A (121) and the upper die insert B (122) are fixedly connected with an upper die mounting component; the upper die shaping block (123) is connected with the output end of a piston rod of the upper die cylinder (124), the upper die cylinder (124) is fixedly arranged on the upper die mounting component, and the upper die shaping block (123) can move inside and outside along the horizontal direction;
A lower die mounting upright post (29) is fixedly arranged at the center of the upper end surface of the lower die bottom plate, and a lower die mounting component (24) is sleeved on the outer side of the lower die mounting upright post (29); the lower die cylinder and the lower die nitrogen cylinder are respectively fixedly arranged at the upper part and the lower part of the lower die mounting upright post;
A lower die cylinder placing hole (234) corresponding to the position of the lower die cylinder is formed in the middle of the lower die mounting component (24), and the output end of a piston rod of the lower die cylinder is fixedly connected with the lower die shaping block after the lower die cylinder passes through the lower die cylinder placing hole;
a lower die nitrogen cylinder placing hole (26) corresponding to the position of the lower die nitrogen cylinder is formed in the lower part of the lower die mounting part (24), and the plug rod output end of the lower die nitrogen cylinder is fixedly connected with the lower die outer forming insert after passing through the lower die nitrogen cylinder placing hole;
The lower outer die forming insert (22) is of a multi-flap structure, and the multi-flap outer die forming insert is arranged around the axis of the lower die mounting component (24) as the center.
2. The rim forming die according to claim 1, wherein: the lower die inner forming insert (23) comprises a lower die insert (231) and a lower die shaping block (232), the lower die insert (231) is fixedly arranged on the upper part of the lower die mounting component (24), and the lower die shaping block (232) is sleeved on the lower die mounting component (24); the lower die shaping block (232) is connected with the output end of a piston rod of the lower die cylinder (233);
the lower part of the lower die mounting part (24) is provided with a lower die nitrogen cylinder (25), and the plug rod output end of the lower die nitrogen cylinder (25) is fixedly connected with the lower die outer forming insert (22).
3. The rim forming die according to claim 2, wherein: and a cooling pipeline is arranged in the lower die outer forming insert (22).
4. A rim forming die as claimed in claim 3, wherein: an upper die cylinder placing hole (125) is formed in the upper die mounting component, and the upper die cylinder is fixedly arranged in the upper die cylinder placing hole (125).
5. The rim forming die set forth in claim 4, wherein: a limiting table (131) is arranged at the bottom end of the upper die guide part (13); an open slot (132) corresponding to the position of the upper die cylinder is formed in the side wall of the upper die guide part (13), and the open slot (132) is arranged so that the upper die cylinder and the upper die guide part cannot interfere when the upper die installation part moves relative to the upper die guide part.
6. The rim forming die according to claim 1, wherein: the upper die shaping block (123) is of a multi-petal structure, and the multi-petal upper die shaping block is arranged in a surrounding manner by taking the axis of the upper die guide part (13) as the center;
the lower die shaping block (232) is of a multi-petal structure, and the multi-petal lower die shaping block is arranged in a surrounding mode by taking the axis of the lower die mounting component (24) as the center.
7. A method of operating a rim forming die as claimed in claim 3, wherein: the method comprises the following steps:
a. Initial state:
Cooling water is introduced into a cooling pipe in the lower die outer forming insert, and the upper die and the lower die are in a separated state; the upper die nitrogen cylinder plug rod of the upper die is in an ejection state, so that the output end of the plug rod is positioned at the maximum stroke position, the upper die mounting part slides to the bottommost end of the upper die guide part, and the upper die forming insert is positioned at the bottommost end of the upper die guide part along with the upper die mounting part; the piston rod of the upper die cylinder is retracted to enable the output end of the piston rod to be in a zero stroke position, so that the upper die shaping block is in a pulled-back state;
The nitrogen cylinder plug rod of the lower die is in an ejection state, so that the output end of the plug rod is positioned at the maximum stroke position, and the outer forming insert of the lower die is in a sliding-out state; the piston rod of the lower die cylinder is retracted to enable the output end of the piston rod to be in a zero stroke position, so that the lower die shaping block is in a pulled-back state;
b. Placing a blank and closing the die:
placing the unshaped steel ring into a lower die, wherein the unshaped steel ring is sleeved outside the lower die inner forming insert and positioned inside the lower die outer forming insert;
the upper die starts to descend, the upper die forming insert descends along with the upper die, and when the lower surface of the upper die mounting part is contacted with the upper surface of the lower die mounting part, the wedge surface of the upper die driving block is just contacted with the wedge surface of the lower die driving block;
c. shaping:
the upper die bottom plate continues to move downwards, and the lower surface of the upper die mounting part is contacted with the upper surface of the lower die mounting part in the step b, so that the upper die mounting part does not move any more, and the upper die forming insert arranged on the upper die mounting part does not move in the vertical direction; the upper die guide part is inserted into the inner side of the lower die installation part along with the downward movement of the upper die bottom plate, at the moment, the plug rod output end of the upper die nitrogen cylinder is compressed back, and meanwhile, the upper die driving block downwards presses the die driving block so as to drive the lower die outer forming insert to move inwards along the horizontal direction until the horizontal stroke of the lower die outer forming insert is completely finished, at the moment, the upper die bottom plate is not moved any more, and the lower die outer forming insert, the upper die forming insert and the lower die inner forming insert are matched together to extrude and form an unshaped steel ring;
In the process that the upper die bottom plate continues to descend, the upper die shaping block and the lower die shaping block respectively move outwards to eject under the driving action of the upper die cylinder and the lower die cylinder and are matched with the lower die outer shaping insert to extrude and shape the steel ring; when the upper die bottom plate does not move any more, the upper die shaping block and the lower die shaping block also move outwards just to reach the stroke end of the upper die shaping block, so that the integral shaping of the part is realized to obtain a rim;
d. And (3) returning and taking:
After the rim is formed, the upper die bottom plate moves upwards, the compression amount of the plug rod of the upper die nitrogen cylinder starts to decrease, the upper die bottom plate drives the upper die driving block to move upwards, the pressure of the upper die driving block on the lower die driving block is reduced, the compression amount of the plug rod of the lower die nitrogen cylinder starts to decrease, and the plug rod of the lower die nitrogen cylinder extends outwards to push the lower die outer forming insert to move along the outer side of the horizontal direction;
The upper die shaping block and the lower die shaping block are respectively moved inwards and retracted under the driving action of an upper die cylinder and a lower die cylinder; the upper die bottom plate continues to ascend, and when the lower die outer forming insert moves to the limit position along the outer side of the horizontal direction, the upper die shaping block and the lower die shaping block also just move inwards to retract to the limit position;
And the upper die bottom plate continues to ascend to realize the separation of the upper die and the lower die, and then the rim formed in the lower die is taken out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010343565.5A CN111496090B (en) | 2020-04-27 | 2020-04-27 | Rim forming die and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010343565.5A CN111496090B (en) | 2020-04-27 | 2020-04-27 | Rim forming die and method |
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| CN212121422U (en) * | 2020-04-27 | 2020-12-11 | 东营布鲁特新材料有限公司 | Rim forming die |
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| US3509755A (en) * | 1967-09-13 | 1970-05-05 | Firestone Tire & Rubber Co | Method and apparatus for producing vehicle rims |
| CN104325091B (en) * | 2014-10-24 | 2016-08-24 | 刘加兴 | A kind of method of casting of automobile hub and mould |
| CN104759532B (en) * | 2015-03-06 | 2017-02-01 | 浙江风驰机械有限公司 | Rim hemming one-step forming die |
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| CN212121422U (en) * | 2020-04-27 | 2020-12-11 | 东营布鲁特新材料有限公司 | Rim forming die |
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