Aluminum alloy wheel forging die

Abstract

The utility model relates to an aluminum alloy wheel forging die, and relates to the field of wheel forging. The mold comprises an upper mold plate, an upper mold base fixedly installed on the upper mold plate, an upper mold core installed in the upper mold base, an upper ejector fixedly connected with the upper mold core, a lower mold plate, a lower mold base fixedly installed on the lower mold plate, a lower mold core installed in the lower mold base and a lower ejector fixedly connected with the lower mold core. When the forging die is used for forging a blank, the blank can be forged from the inner side and the outer side, meanwhile, the upper half part and the lower half part of the blank can be subjected to forging plasticity at the same time, one-time machining forming of a wheel is achieved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of wheel forging, in particular to an aluminum alloy wheel forging die. Background Art

[0002] Wheel forging is a manufacturing method that uses high temperature and pressure to form metal materials into the desired wheel shape. When forging a wheel, the material is heated and placed in the mold of a forging machine. By applying huge pressure, the material is deformed to form a wheel that matches the shape of the mold.

[0003] At present, the Chinese patent application with publication number CN213613907U and publication date July 6, 2021 proposes a forging die for an aluminum alloy wheel with an inwardly concave wheel well. The upper die seat is divided into several parts along the radial direction. The inner side of the upper die seat is provided with a flange that matches the inwardly concave wheel well. The space formed by the inner side wall of the upper die seat, the upper end face of the lower die core and the lower end face of the upper die core constitutes the shape of the blank. The top of the upper base plate is provided with a step groove corresponding to the position of the upper die seat, and a connecting rod is placed in the step groove. The connecting block is stepped and the maximum width of the upper part is greater than the maximum width of the lower part. The connecting block passes through the step groove and is fixedly connected to the upper end of the upper die base. The upper die base can move along its center line direction; the top and bottom of the upper ejector are cylinders with the same outer diameter as the inner diameter of the center hole, and there is a cone between the top and the bottom. A through hole is provided on the upper die core corresponding to the direction of the symmetry axis of the transverse section of the upper die base, and an ejector rod is installed in the through hole. One end of the ejector rod is in contact with the conical surface of the cone, and the other end is in contact with the upper die base.

[0004] When the mold is opened, the power mechanism pushes the upper ejector downward, and the conical surface of the upper ejector presses the ejector rod to move along the radial direction of the mold, ejecting the upper mold base outward along its center line. At this time, the upper mold base can be separated from the wheel blank.

[0005] Regarding the above-mentioned related technologies, by setting the upper die seat as a split structure and cooperating with the ejector rod, the shape of the upper half of the concave wheel well can be forged. However, the lower half of the rim of the existing wheel is usually also designed with retaining rings and grooves. If the above-mentioned technical solution is used to forge the wheel twice, it will affect the processing efficiency, or if the retaining rings or groove structures on the rim are processed by subsequent processes such as spinning or turning, the workload is large and the efficiency is low. Utility Model Content

[0006] In order to realize one-time forging of a retaining ring and a groove structure on the outer peripheral surface of a rim and improve the processing efficiency of the wheel, the utility model provides an aluminum alloy wheel forging die.

[0007] The utility model provides an aluminum alloy wheel forging die, which adopts the following technical solutions:

[0008] The present invention relates to an aluminum alloy wheel forging die, comprising an upper die plate, an upper die base mounted on the upper die plate, an upper die core arranged in cooperation with the upper die base, an upper ejector fixedly connected to the upper die core, a lower die plate, a lower die base mounted on the lower die plate, a lower die core arranged in cooperation with the lower die base and a lower ejector fixedly connected to the lower die core, the upper die core comprising an upper inner die core and an upper outer die core, the upper inner die core being fixedly connected to the upper ejector, the upper inner die core being arranged in the upper die base for sliding along the axial direction of the upper inner die core, the upper outer die core comprising a plurality of upper outer die blocks, a plurality of the upper outer die blocks being arranged in the upper die base for sliding along the radial direction of the upper outer die core, a first guide structure being provided between the plurality of upper outer die blocks and the upper die base; the lower die base The mold core includes a lower inner mold core and a lower outer mold core, the lower inner mold core is fixedly connected to the lower ejector, the lower inner mold core is arranged in the lower mold base along the axial sliding of the lower outer mold core, the lower outer mold core includes a plurality of lower outer mold blocks, and the plurality of lower outer mold blocks are arranged in the lower mold base along the radial sliding of the lower outer mold core, and a second guide structure is provided between the plurality of lower outer mold blocks and the lower mold base; the minimum diameter of the outer circumference of the upper outer mold core is the same as the minimum diameter of the outer circumference of the lower outer mold core, and the minimum diameter of the outer circumference of the lower outer mold core is the same as the diameter of the inner circumference of the lower mold base, and the lower mold base is provided with a give way groove at the middle height position, the give way groove is used for the lower outer mold block to slide radially, and the give way groove is coaxially arranged with the lower inner mold core.

[0009] By adopting the above technical solution, when forging the blank, the blank is placed on the lower inner die core, and then the lower inner die core and the lower outer die block move downward with the lower ejector until the lower outer die block is completely stuck in the lower die base and is in the minimum diameter position, and then the upper ejector drives the upper die core and the upper outer die block to move downward, and inserts the upper outer die block into the lower die base and presses against the upper surface of the lower outer die base, and the upper inner die core and the lower inner die core forge the blank to shape the blank; wherein when the lower outer die block and the upper outer die block move in the lower die base, the lower outer die block will move along the conical guide structure between the give way groove and the lower outer die block toward the direction close to the lower die core and enter the lower die base, and the upper outer die block will move along the upper outer die block and the lower die base The conical guide structure arranged between them moves toward the direction close to the upper die core and enters the lower die seat; when the blank is forged, the inner circumference of the lower die seat will support the outer circumference of the upper outer die block and the outer circumference of the lower outer die block; when the blank is forged, the lower ejector will first eject the lower die core, the lower outer die block, the upper die core and the upper outer die block upward until the upper die core and the upper outer die block are separated from the lower die seat. At this time, the lower outer die block is located at a position corresponding to the give way groove. Secondly, the upper outer die block and the lower outer die block both move along the radial direction of the blank toward the direction of the original axis to complete the demolding of the outer circumference of the blank. Once again, the upper ejector drives the upper die core to move upward to complete the demolding of the top of the blank. Finally, the blank is clamped away from the lower die core.

[0010] In this way, when the blank is forged, the upper outer die block and the lower outer die block will be inserted into the lower die seat, and the inner circumference of the lower die seat will support the outer circumference of the upper outer die block and the outer circumference of the lower outer die block, thereby reducing the deformation of the upper outer die block and the lower outer die block caused by extrusion during forging, and improving the forging accuracy; and the upper die core is set as the upper inner die core and the upper outer die core, and the lower die core is set as the lower inner die core and the lower outer die core, so that the upper and lower halves of the blank can be shaped from the inside and outside respectively, thereby realizing a one-time forging of the retaining ring and the groove structure on the outer circumference of the rim, and improving the forging efficiency of the wheel.

[0011] Optionally, the first guide structure is a slider arranged above the upper outer mold block and a slide groove arranged on the end surface of the upper mold plate close to the upper outer mold core. The slide groove and the slider are both arranged along the radial direction of the upper outer mold core, and the slide groove is slidably arranged in the slide groove.

[0012] By adopting the above technical solution, the upper outer module block can slide along the radial direction of the upper outer mold core. When the slider slides along the slide groove toward the upper inner mold core, multiple upper outer module blocks can move along with the slider toward the upper inner mold core. When the slider slides along the slide groove away from the upper inner mold core, multiple upper outer module blocks can move along with the slider away from the upper inner mold core. The arrangement of the slider and the slide groove can guide the upper outer module block as it moves along the radial direction of the upper inner mold core, making the movement of the upper outer module block more stable and reducing the probability of the upper outer module block shifting during movement.

[0013] Optionally, the first guide structure also includes a support portion arranged on the slider and a support groove arranged in the slide groove, the support portion and the support groove are cooperatively arranged, the support portion is slidably arranged in the support groove, and the lower end surface of the support portion abuts against the lower end surface of the support groove.

[0014] By adopting the above technical solution, when the slider slides in the chute, the lower surface of the support portion slides on the upper surface of the support groove. The coordinated arrangement of the support portion and the support groove enables the slider to be supported in the chute, thereby supporting the upper outer module. At the same time, the coordination of the support portion and the support groove reduces the possibility of shaking and deviation, making the slider slide more stable in the chute.

[0015] Optionally, the first guide structure further includes an elastic member disposed in the slide groove, and the elastic member has a tendency to cause the upper outer mold block to approach the upper inner mold core.

[0016] By adopting the above technical solution, when the elastic member is a thrust spring, one end of the elastic member abuts the end of the chute away from the upper inner mold core, and the other end abuts the end of the slider away from the upper inner mold core; when the elastic member is a tension spring, one end of the elastic member is fixedly connected to the end of the chute near the upper inner mold core, and the other end is fixedly connected to the end of the slider near the upper inner mold core. In this way, the upper outer mold block can move toward the end near the upper inner mold core under the action of the elastic member, helping the upper outer mold block to better enter the lower mold base when it moves downward into the lower mold base.

[0017] Optionally, the second guide structure includes a guide boss arranged in the lower mold base and a guide groove arranged in the lower outer mold block, the guide boss and the guide groove are arranged in a vertical direction in a first direction and in a radial direction of the lower inner mold core in a second direction, and the guide boss is slidably arranged in the guide groove.

[0018] By adopting the above technical solution, the guide groove can play a role in guiding the fragrance when sliding in the guide boss, reducing the probability of position displacement or tilting of the lower outer module block during movement, and increasing the stability of the lower outer module block during movement.

[0019] Optionally, a ball structure is further provided on the slider and the guide boss.

[0020] By adopting the above technical solution, the ball structure can reduce the friction between the end faces of the slider and the guide groove when the slider moves in the guide groove; when the guide boss moves in the guide groove, the friction between the end faces of the guide boss and the guide groove is reduced, making the movement of the upper outer module block and the lower outer module block smoother and more stable.

[0021] Optionally, a first pushing structure is provided on the outer circumference of the upper inner mold core, and a second pushing structure is provided on the inner circumference of each of the plurality of upper outer mold blocks, and the first pushing structure and the second pushing structure are arranged in coordination.

[0022] By adopting the above technical solution, when forging is completed and demolding is performed, the first pushing mechanism cooperates with the second pushing structure to push the upper outer mold block in the horizontal direction away from the upper mold core, thereby separating the inner circumference of the upper outer mold block from the blank to complete demolding.

[0023] Optionally, the first pushing structure is a conical surface arranged at the top of the outer circumferential surface of the upper inner mold core, and the second pushing structure is a conical surface arranged at the top of the inner circumferential surface of the upper outer module block. The conical surface of the first pushing structure and the conical surface of the second pushing structure are both small at the top and large at the bottom. The conical surface of the first pushing structure and the conical surface of the second pushing structure have the same inclination angle and are in contact with each other.

[0024] By adopting the above technical solution, the upper ejector first drives the upper inner mold core upward, and the upper outer mold block moves away from the upper inner mold core in cooperation with the conical surface of the first pushing structure and the conical surface of the second pushing structure. Since the upper outer mold block can only move in the radial direction of the upper inner mold core, it is horizontally away from the blank, reducing the probability of interference between the upper outer mold block and the blank. In this way, the first pushing structure and the second pushing structure are configured as mutually cooperating conical structures, which can help separate the upper outer mold block from the blank without the need for an additional power structure, simplifying the overall complexity of the mold and facilitating installation and use.

[0025] Optionally, a pushing assembly is further provided between the lower inner mold core and the lower ejector, the pushing assembly including a lifting member and a guide member coaxially arranged with the lower inner mold core, the movable end of the lifting member is fixedly connected to the lower surface of the lower inner mold core, and the fixed end is connected to the upper surface of the guide member, the lower surface of the guide member is fixedly connected to the lower ejector, the outer peripheral surface of the guide member is provided with a third pushing structure, the inner peripheral surface of the plurality of lower outer module blocks is provided with a fourth pushing structure, and the third pushing structure is coordinated with the fourth pushing structure.

[0026] By adopting the above technical solution, when forging is completed and demolding is carried out, first the lower ejector will lift the lower inner mold core, the lower outer mold block and the pushing assembly upwards until the upper outer mold block is ejected from the lower mold base. At this time, the lower outer mold block will be at a position corresponding to the horizontal height of the clearance groove in the lower mold base. Secondly, the position of the lower ejector will rise again, and the length of the lifting member in the pushing assembly will shrink. In this way, when the position of the lower inner mold core remains unchanged, the position of the guide member will move upward with the position of the lower ejector. The third pushing structure provided on the outer peripheral surface of the guide member will cooperate with the fourth pushing structure provided on the inner peripheral surface of the lower outer mold block and move the lower outer mold block away from the lower inner mold core into the clearance groove under the mutual action of gravity. In this way, the lower outer mold block can be moved horizontally along the axial direction of the lower inner mold core, completing the demolding between the lower outer mold block and the blank, and realizing the forging of the upper retaining ring and groove of the lower half of the wheel.

[0027] Optionally, the third pushing structure is a conical surface arranged on the top of the outer circumferential surface of the guide member, and the fourth pushing structure is a conical surface arranged on the inner circumferential surface of the lower outer module block. The conical surface of the third pushing structure and the conical surface of the fourth pushing structure are both small at the top and large at the bottom. The conical surface of the third pushing structure and the conical surface of the fourth pushing structure have the same inclination angle and are in contact with each other.

[0028] By adopting the above technical solution, when the guide member moves upward relative to the upper outer die block, the conical surface of the third pushing structure exerts a force perpendicular to and outward on the conical surface of the fourth pushing structure. This force, combined with the gravity acting on the lower outer die block, causes the lower outer die block to move horizontally along the radial direction of the lower inner die core, away from the lower inner die core. In this way, the conical surface structure can simultaneously move multiple lower outer die blocks horizontally away from the lower inner die core, completing the demolding of the lower half of the blank after forging.

[0029] In summary, the present invention has at least one of the following beneficial technical effects:

[0030] The upper inner core and the lower inner core are divided into the inner core and the outer core. When forging the blank, the blank can be forged from both the inside and the outside. At the same time, the upper and lower halves of the blank can be forged plastically at the same time, realizing one-time processing and forming of the wheel and improving production efficiency.

[0031] When the upper outer module block and the lower outer module block move along the radial direction of the upper inner mold core and the lower inner mold core respectively, a guide structure is provided to increase the smoothness of movement of the upper outer module block and the lower outer module block during demoulding, making demoulding smoother.

[0032] By setting a conical structure to control the movement of the upper outer module block and the lower outer module block, multiple outer module blocks can be moved and demolded at the same time during demolding. There is no need to set up additional power mechanisms and control mechanisms, which simplifies the complexity of the device and makes it easier to operate and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0034] Figure 2 This is an exploded view of the overall structure of an embodiment of the utility model;

[0035] Figure 3 This is a top view of the overall structure of an embodiment of the utility model;

[0036] Figure 4 yes Figure 3 Schematic cross-sectional view of AA in the figure;

[0037] Figure 5 yes Figure 4 Schematic diagram of the demoulding state;

[0038] Figure 6 yes Figure 5 A partial enlarged schematic diagram of part A;

[0039] Figure 7 yes Figure 5 A partial enlarged schematic diagram of part B;

[0040] Figure 8 yes Figure 2 A partial enlarged schematic diagram of part C in the middle.

[0041] Explanation of the accompanying drawings: 1. upper template; 2. upper mold base; 3. upper mold core; 31. upper inner mold core; 311. first pushing structure; 32. upper outer mold core; 321. upper outer mold assembly block; 322. second pushing structure; 33. first guiding structure; 331. slider; 332. slide groove; 333. support part; 334. support groove; 335. elastic member; 4. upper ejector; 5. lower template; 6. lower mold base; 61. yield groove; 7. lower mold core; 71. lower inner mold core; 72. lower outer mold core; 721. lower outer mold assembly block; 722. fourth pushing structure; 73. second guiding structure; 731. guide boss; 732. guide slide groove; 733. ball structure; 74. pushing assembly; 741. lifting member; 742. guide member; 743. third pushing structure; 8. lower ejector. DETAILED DESCRIPTION

[0042] The following combination Figures 1 to 8 The utility model is described in further detail.

[0043] The embodiment of the utility model discloses an aluminum alloy wheel forging die. Figures 1 to 4 An aluminum alloy wheel forging mold mainly includes an upper template 1, an upper die base 2 fixedly mounted on the upper template 1, an upper die core 3 installed inside the upper die base 2, an upper ejector 4 fixedly connected to the upper die core 3, a lower template 5, a lower die base 6 fixedly mounted on the lower template 5, a lower die core 7 installed inside the lower die base 6 and a lower ejector 8 fixedly connected to the lower die core 7. When forging the wheel, the heat-treated billet is placed on the lower die core 7, and then the upper ejector 4 drives the upper die base 2 and the upper die core 3 to move downward, and the upper die core 3 and the lower die core 7 pressurize and forge the billet. The upper half of the billet is forged into the shape formed by the space between the upper die base 2 and the upper die core 3, and the lower half of the billet is forged into the shape between the lower die base 6 and the lower die core 7; when forging is completed, the billet is demolded and can be taken out.

[0044] Reference Figure 2 and Figure 4The upper mold base 2 is arranged in an annular shape, and the upper mold base 2 is fixedly mounted on the lower surface of the upper mold plate 1 by bolts. A circular through hole is provided at the center of the upper mold plate 1 for the upper ejector 4 to pass through. The upper mold core 3 includes an upper inner mold core 31 and an upper outer mold core 32, wherein the upper inner mold core 31 is fixedly mounted on the lower surface of the upper ejector 4, the upper inner mold core 31 and the upper mold base 2 are coaxially arranged, and the upper outer mold core 32 is an annular structure as a whole. The inner circumference of the upper outer mold core 32 and the outer circumference of the upper inner mold core 31 are provided with a protrusion structure and a groove structure for setting the wheel shape. The upper outer mold core 32 consists of four The outer mold block 321 is composed of a completely identical quarter-circular ring structure, each quarter-circular ring is an upper outer mold block 321, the lower half of the upper inner mold core 31 is provided with a small upper and large lower cone structure, the upper half of the cone structure is provided with a conical surface, and the cone surface forms a first pushing structure 311. The inner circumference of the upper outer mold block 321 and the cone structure on the upper inner mold core 31 are provided with another conical ring surface, which is the second pushing structure 322. The conical ring surface of the first pushing structure 311 and the conical ring surface of the second pushing structure 322 have the same inclination angle and contact with each other. The upper outer mold block 32 1 and the upper mold base 2 are connected by a first guide structure 33. The first guide structure 33 includes a slider 331 fixedly arranged on the top of the upper outer mold block 321 and a support portion 333 arranged on the slider 331. A slide groove 332 is provided on the lower surface of the upper mold plate 1. The slide groove 332 extends along the radial direction of the upper inner mold core 31. A support groove 334 with a width greater than the slide groove 332 is provided above the slide groove 332. The size of the slider 331 matches the size of the slide groove 332. When the slider 331 is installed in the slide groove 332, the slider 331 can be in the slide groove 332. The support portion 333 is a boss structure with a width greater than that of the slider 331. The size of the support portion 333 is the same as that of the support groove 334. When the support portion 333 is installed in the support groove 334, the bottom surface of the support portion 333 is supported on the bottom surface of the support groove 334, thereby hanging the upper outer module block 321 in the support groove 334. An elastic member 335 is also installed inside the slide groove 332. The elastic member 335 is a thrust spring. One end of the thrust spring abuts against the side wall of the slide groove 332 away from the upper inner mold core 31, and the other end abuts against the side wall of the slider 331 away from the upper inner mold core 31.

[0045] When the upper outer module block 321 is suspended on the upper template 1 through the support part 333 and the support groove 334, the upper outer module block 321 will approach the upper inner mold core 31 under the action of the elastic member 335, and then the four upper outer module blocks 321 will jointly form a circular upper outer mold core 32, and at this time the upper outer mold core 32 is surrounded by the outer periphery of the upper inner mold core 31 and is coaxially arranged with the upper inner mold core 31; when the blank is forged and demolded, the upper ejector 4 drives the upper inner mold core 31 to move upward, and the first pushing structure 311 on the inner circumference of the upper inner mold core 31 will cooperate with the slider 331 to push the four upper outer module blocks 321 in the direction away from the upper inner mold core 31, so that the inner circumference of the upper outer module block 321 is separated from the forged blank, completing the demolding of the upper half of the blank.

[0046] Reference Figure 2 and Figure 4 After the lower die base 6 is formed into an annular structure as a whole, the lower die base 6 is fixedly installed on the lower template 5 by bolts. The lower die base 6 is also provided with a through circular hole for the movement of the lower ejector 8. The through circular hole is coaxially arranged with the lower die base 6. The lower die base 6 is coaxially arranged with the upper die base 2 in the vertical direction. The inner circumference of the lower die base 6 is the same as the outer circumference diameter when the upper outer die block 321 is gathered together to form the upper outer die core 32. The lower die base 6 is provided with a clearance groove 61 at the middle height position. The inner circumference size of the clearance groove 61 is larger than the inner circumference size of the lower die base 6.

[0047] Reference Figures 5 to 7The lower mold core 7 includes a lower inner mold core 71 and a lower outer mold core 72. The lower inner mold core 71, the lower outer mold core 72 and the lower mold base 6 are all coaxially arranged. A pushing assembly 74 is provided on the lower bottom surface of the lower inner mold core 71. The pushing assembly 74 includes a guide member 742 and a lifting member 741 fixedly arranged on the top of the lower ejector 8. The guide member 742 is a frustum structure fixedly arranged on the top of the lower ejector 8. A third pushing structure 743 is provided above the guide member 742. The third pushing structure 743 is a conical surface with a small upper part and a large lower part. The lifting member 741 is a hydraulic push rod. The hydraulic push rod is arranged above the guide member 742 in the vertical direction, and the fixed end of the hydraulic push rod is fixedly arranged on the guide member 742. The moving end of the hydraulic push rod is fixedly connected to the lower bottom surface of the lower inner mold core 71; the lower outer mold core 72 is an annular structure coaxially arranged with the lower inner mold core 71 as a whole. The lower outer mold core 72 The inner circumference is matched with the shape of the wheel and is provided with a protrusion and groove structure. The lower outer mold core 72 is composed of four completely identical fan-shaped structures, each fan-shaped structure is a separate lower outer mold block 721, and the bottom of the lower outer mold block 721 is matched with the third pushing structure 743 and is provided with a fourth pushing structure 722. The fourth pushing structure 722 is a conical structure matched with the third pushing structure 743. The conical structure of the third pushing structure 743 and the conical structure of the fourth pushing structure 722 have the same inclination angle and contact each other. A second guide structure 73 is also provided between the outer circumference of each lower outer mold core 72 and the inner wall of the lower mold base 6. The second guide structure 73 is a guide boss 731 arranged on the inner circumference of the lower mold base 6 and on the inner circumference of the give way groove 61. A guide groove 732 is also provided on the outer circumference of each lower outer mold core 72 matched with the guide boss 731.

[0048] Reference Figure 7 The height of the give way groove 61 is equal to the height of the lower outer die core 72, and the bottom of the give way groove 61 is provided with a conical surface structure that transitions with the inner circumference of the lower die base 6, and the bottom of the outer circumference of the lower outer die block 721 that cooperates with the conical surface structure is also provided with the same conical surface structure, so that after the lower outer die block 721 moves into the give way groove 61 along the radial direction of the lower inner die core 71, it can slide downward along the conical surface structure at the bottom of the give way groove 61 and slide out of the give way groove 61; at the same time, the top of the inner circumference of the lower die base 6 is also provided with a conical surface structure, and the corresponding bottom of the outer circumference of the upper outer die block 321 is also provided with a conical surface structure, so that when the upper outer die block 321 enters the lower die base 6, it can enter the lower die base 6 along the conical surface structure to forge the blank.

[0049] Reference Figure 8In order to reduce the friction between the slider 331 and the slide groove 332 provided on the upper outer module block 321 when the upper outer module block 321 slides along the radial direction of the upper inner mold core 31 in the upper mold base 2, and to reduce the friction between the guide slide groove 732 and the guide boss 731 provided on the lower outer module block 721 when the lower outer module block 721 moves along the radial direction of the lower inner mold core 71 in the lower mold base 6, a ball structure 733 is also provided on the slider 331 and the guide boss 731. The ball structure 733 is formed by opening a circular hole on the slider 331 and the guide boss 731 and placing a ball in the circular hole.

[0050] The implementation principle of the aluminum alloy wheel forging die in the embodiment of the present utility model is as follows:

[0051] When forging the blank, the blank is placed on the lower inner die core 71. First, the lifting member 741 extends and the lower ejector 8 moves downward in coordination, so that the fourth pushing structure 722 on the inner circumference of the lower outer die block 721 and the third pushing structure 743 on the outer circumference of the guide member 742 are separated. Secondly, the lower ejector 8 drives the lower die core 7, the lower outer die block 721, the lifting member 741 and the guide member 742 to move downward synchronously. Since the inner circumference of the lower outer die block 721 is not supported by the guide member 742 at this time, the lower outer die block 721 moves downward under the action of gravity in the opposite direction of the third pushing structure 743 and the fourth pushing structure 722, the direction of the conical surface set on the give way groove 61 and the direction of the conical surface set at the bottom of the outer circumference of the lower outer die block 721, and moves along the radial direction of the lower inner die core 71 The upper mold core 331 is pressed downwards by the upper mold core 31 and the lower mold base 6 is pressed downwards by the upper mold core 31 and the lower mold base 6 is pressed downwards by the upper mold core 31. The upper mold core 331 is pressed downwards by the upper mold core 31 and the upper mold base 6 is pressed downwards by the upper mold core 31. The upper mold core 331 is pressed downwards by the upper mold core 31 and the upper mold base 6 is pressed downwards by the upper mold core 31. The upper mold core 331 is pressed downwards by the upper mold core 31 and the upper mold base 6 is pressed downwards by the upper mold core 31.

[0052] After the forging of the blank is completed, when the material is taken out, the lower ejector 8 will push the pushing component 74, the lower inner mold core 71, the lower outer mold core 72, the upper inner mold core 31, the upper outer mold core 32, the upper die base 2, the upper template 1 and the upper ejector 4 upward at the same time until the upper inner mold core 31 and the upper outer mold core 32 are ejected from the lower die base 6. Secondly, the upper ejector 4 moves upward, and the upper outer mold block 321 is pushed by the first pushing structure 311 and the second pushing structure 322 along the opposite direction of the slide groove 332, horizontally away from the upper inner mold core 31 in the radial direction of the upper inner mold core 31, completing the demoulding of the outer peripheral surface of the upper half of the blank. Again, the upper ejector 4 drives the upper template 1, the upper die base 2, the upper inner mold core 31 When the forging is complete, the cam 721 is pushed away from the bottom of the mold and the upper outer mold core 32 is moved upward again to complete the demolding of the inner circumference of the upper half of the blank. At the same time, the lower ejector 8 pushes the lower outer mold block 721 to a position corresponding to the horizontal height of the clearance groove 61, and the lower ejector 8 pushes the lifting member 741 upward while contracting, so that the height of the lower inner mold core 71 and the lower outer mold block 721 remains unchanged, and the lower outer mold block 721 is squeezed by the third pushing structure 743 and the fourth pushing structure 722 of the guide member 742, and moves horizontally along the radial direction of the lower inner mold core 71 away from the lower inner mold core 71 to complete the demolding of the outer circumference of the lower half of the blank. The forging completed blank can be clamped away from the lower inner mold core 71 using a clamp to complete the entire demolding.

[0053] To sum up, the present application divides the upper inner mold core 31 into the upper inner mold core 31 and the upper outer mold core 32, and divides the lower inner mold core 71 into the lower inner mold core 71 and the lower outer mold core 72. When forging the blank, the blank can be forged from both the inside and outside sides, and the upper and lower halves of the blank can be forged plastically at the same time. When demolding, the upper outer mold block 321 and the lower outer mold block 721 are moved horizontally along the radial directions of the upper inner mold core 31 and the lower inner mold core 71 respectively, reducing the probability of interference and collision between the lower outer mold block 721 and the upper outer mold block 321 and the blank, realizing one-time processing and forming of the wheel, improving production efficiency, and by setting multiple conical structures for guidance and push separation, the mold does not need to be set up with an additional power mechanism when demolding, reducing the complexity of the device and making it easier to operate.

[0054] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An aluminum alloy wheel forging die, comprising an upper die plate (1), an upper die base (2) mounted on the upper die plate (1), an upper die core (3) arranged in cooperation with the upper die base (2), an upper ejector (4) fixedly connected to the upper die core (3), a lower die plate (5), a lower die base (6) mounted on the lower die plate (5), a lower die core (7) arranged in cooperation with the lower die base (6), and a lower ejector (8) fixedly connected to the lower die core (7), characterized in that: The upper mold core (3) includes an upper inner mold core (31) and an upper outer mold core (32), the upper inner mold core (31) is fixedly connected to the upper ejector (4), the upper inner mold core (31) is arranged in the upper mold base (2) along the axial sliding direction of the upper inner mold core (31), the upper outer mold core (32) includes a plurality of upper outer mold blocks (321), the plurality of upper outer mold blocks (321) are arranged in the upper mold base (2) along the radial sliding direction of the upper outer mold core (32), and a first guide structure (33) is provided between the plurality of upper outer mold blocks (321) and the upper mold base (2); The lower mold core (7) includes a lower inner mold core (71) and a lower outer mold core (72), the lower inner mold core (71) is fixedly connected to the lower ejector (8), the lower inner mold core (71) is arranged in the lower mold base (6) along the axial sliding direction of the lower outer mold core (72), the lower outer mold core (72) includes a plurality of lower outer mold blocks (721), the plurality of lower outer mold blocks (721) are arranged in the lower mold base (6) along the radial sliding direction of the lower outer mold core (72), and a second guide structure (73) is provided between the plurality of lower outer mold blocks (721) and the lower mold base (6); The minimum diameter of the outer circumference of the upper outer mold core (32) is the same as the minimum diameter of the outer circumference of the lower outer mold core (72), and the minimum diameter of the outer circumference of the lower outer mold core (72) is the same as the diameter of the inner circumference of the lower mold base (6). The lower mold base (6) is provided with a clearance groove (61) at a middle position of the height, and the clearance groove (61) is used for the lower outer mold block (721) to slide radially. A conical guide structure is also provided between the clearance groove (61) and the lower outer mold block (721). The clearance groove (61) is coaxially arranged with the lower inner mold core (71), and a conical guide structure is also provided between the upper outer mold block (321) and the lower mold base (6).

2. The aluminum alloy wheel forging die according to claim 1, characterized in that: The first guide structure (33) is a slider (331) arranged above the upper outer mold block (321) and a slide groove (332) arranged on the end surface of the upper mold plate (1) close to the upper outer mold core (32); the slide groove (332) and the slider (331) are both arranged along the radial direction of the upper outer mold core (32), and the slide groove (332) is slidably arranged in the slide groove (332).

3. The aluminum alloy wheel forging die according to claim 2, characterized in that: The first guide structure (33) further includes a support portion (333) arranged on the slider (331) and a support groove (334) arranged in the slide groove (332); the support portion (333) and the support groove (334) are arranged in coordination with each other; the support portion (333) is slidably arranged in the support groove (334), and the lower end surface of the support portion (333) abuts against the lower end surface of the support groove (334).

4. The aluminum alloy wheel forging die according to claim 3, characterized in that: The first guide structure (33) further includes an elastic member (335) disposed in the slide groove (332), and the elastic member (335) has a tendency to make the upper outer mold block (321) approach the upper inner mold core (31).

5. The aluminum alloy wheel forging die according to claim 3, characterized in that: The second guide structure (73) includes a guide boss (731) arranged in the lower mold base (6) and a guide slot (732) arranged in the lower outer mold assembly block (721); the guide boss (731) and the guide slot (732) are arranged in a vertical direction in a first direction and in a radial direction of the lower inner mold core (71) in a second direction; the guide boss (731) is slidably arranged in the guide slot (732).

6. The aluminum alloy wheel forging die according to claim 5, characterized in that: The slider (331) and the guide boss (731) are also provided with a ball structure (733).

7. The aluminum alloy wheel forging die according to any one of claims 1 to 6, characterized in that: A first pushing structure (311) is provided on the outer circumference of the upper inner mold core (31), and a second pushing structure (322) is provided on the inner circumference of each of the plurality of upper outer mold blocks (321). The first pushing structure (311) and the second pushing structure (322) are arranged in coordination.

8. The aluminum alloy wheel forging die according to claim 7, characterized in that: The first pushing structure (311) is a conical surface arranged at the top of the outer peripheral surface of the upper inner mold core (31), and the second pushing structure (322) is a conical surface arranged at the top of the inner peripheral surface of the upper outer mold block (321). The conical surface of the first pushing structure (311) and the conical surface of the second pushing structure (322) are both small at the top and large at the bottom. The conical surface of the first pushing structure (311) and the conical surface of the second pushing structure (322) have the same inclination angle and are in contact with each other.

9. The aluminum alloy wheel forging die according to any one of claims 1 to 6, characterized in that: A pushing assembly (74) is also provided between the lower inner mold core (71) and the lower ejector (8), and the pushing assembly (74) includes a lifting member (741) and a guide member (742) coaxially arranged with the lower inner mold core (71), the movable end of the lifting member (741) is fixedly connected to the lower surface of the lower inner mold core (71), and the fixed end is connected to the upper surface of the guide member (742), the lower surface of the guide member (742) is fixedly connected to the lower ejector (8), the outer peripheral surface of the guide member (742) is provided with a third pushing structure (743), the inner peripheral surface of the plurality of lower outer mold blocks (721) is provided with a fourth pushing structure (722), and the third pushing structure (743) is provided in coordination with the fourth pushing structure (722).

10. The aluminum alloy wheel forging die according to claim 9, characterized in that: The third pushing structure (743) is a conical surface arranged on the top of the outer peripheral surface of the guide member (742), and the fourth pushing structure (722) is a conical surface arranged on the inner peripheral surface of the lower outer module block (721). The conical surface of the third pushing structure (743) and the conical surface of the fourth pushing structure (722) are both small at the top and large at the bottom. The conical surface of the third pushing structure (743) and the conical surface of the fourth pushing structure (722) have the same inclination angle and are in contact with each other.

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