Preforming die for an aluminum alloy wheel

Abstract

The application relates to the technical field of aluminum alloy wheels, in particular to a pre-forging die for aluminum alloy wheels; the pre-forging die comprises a support, a rotating disc, a lower die and an upper die; the upper die is composed of a first upper module, a second upper module and a third upper module; the lower die is composed of a first lower module, a second lower module and a third lower module; the shapes of the upper die and the lower die can be changed; the first upper module, the second upper module, the second lower module and the third lower module can be disassembled and assembled by workers, so that the pre-forging die can be used to manufacture pre-fabricated parts of aluminum alloy wheels with different sizes and specifications, the use effect of the pre-forging die is improved, the replacement and storage of the pre-fabricated die are reduced, the effect of the original die is improved, the cost of the pre-fabricated die is reduced, and the income of the factory is improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy wheel technology, specifically a pre-forging mold for aluminum alloy wheels. Background Technology

[0002] Common car wheel hubs include steel wheel hubs and aluminum alloy wheel hubs. Steel wheel hubs have high strength and are often used in large heavy-duty trucks. However, steel wheel hubs are heavy and have a limited range of shapes, which does not conform to the current concept of low carbon and fashion, and are gradually being replaced by aluminum alloy wheel hubs. At present, the main production methods of aluminum alloy wheel hubs include casting, forging, stamping and spinning.

[0003] In actual production, the forging method involves heating and softening aluminum alloy blocks, pre-forging them into blanks using a die, then spinning them into aluminum alloy wheel parts, and finally precision machining them into aluminum alloy wheels.

[0004] In actual production, one set of forging dies typically corresponds to one type of aluminum alloy wheel blank. Therefore, in the actual production process, factories store many different types of forging dies to cope with the production of aluminum alloy wheels of different types and specifications. This involves a lot of cost in manufacturing dies and occupies a lot of space, which is not conducive to storage and changing dies during forging, thus causing the limitations of this solution.

[0005] In view of this, in order to overcome the above-mentioned technical problems, the present invention proposes a pre-forging mold for aluminum alloy wheels, which solves the above-mentioned technical problems. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention proposes a pre-forging mold for aluminum alloy wheels. By having workers remove and install the No. 1 upper module, No. 2 upper module, No. 2 lower module, and No. 3 lower module, this invention can manufacture prefabricated aluminum alloy wheels of different sizes and specifications, thereby improving the effectiveness of the invention, reducing the need for replacing and storing prefabricated molds, enhancing the performance of the original molds, reducing the cost of prefabricated molds, and increasing factory profits.

[0007] The technical solution adopted by this invention to solve its technical problem is: a pre-forging die for aluminum alloy wheels, comprising:

[0008] support;

[0009] Rotating disk; the rotating disk is rotatably connected to the support;

[0010] Lower mold; the lower mold is fixed on the rotating plate;

[0011] Upper mold; the upper mold is connected to the support via a push rod;

[0012] Drive mechanism; The drive mechanism is used to drive the rotating disk to rotate;

[0013] The upper mold is composed of upper module 1, upper module 2 and upper module 3; upper module 3 is fixedly connected to the output end of the push rod; the lower mold is composed of lower module 1, lower module 2 and lower module 3; lower module 1 is fixedly connected to the rotating disk.

[0014] Preferably, the first lower module, the second lower module, and the third lower module are circular in shape and their sizes decrease sequentially: the first lower module, the second lower module, and the third lower module together form the lower mold;

[0015] The shape of the No. 3 upper module is cylindrical; the shapes of the No. 2 upper module and the No. 1 upper module are tubular; the No. 1 upper module, the No. 2 upper module and the No. 3 upper module can form concentric circles; the outer walls of the No. 1 upper module, the No. 2 upper module and the No. 3 upper module are respectively provided with a No. 1 through groove, a No. 2 through groove and a No. 3 through groove; the same No. 1 fixing block is slidably connected in the No. 1 through groove, the No. 2 through groove and the No. 3 through groove.

[0016] Preferably, a first groove is provided on the inner wall of the first lower module; a second groove and a third groove are provided on the outer and inner walls of the second lower module, respectively; a fourth groove is provided on the outer wall of the third lower module; the first, second, third, and fourth grooves respectively penetrate the upper end faces of the first, second, and third lower modules; the first and second grooves are slidably connected to the same second fixing block; the third and fourth grooves are connected to the same second fixing block.

[0017] Preferably, the bottom of the first upper module and the second upper module are fixedly connected to the first circular block and the second circular block.

[0018] Preferably, the length of the first fixing block is the same as the diameter of the outer side of the second upper module, the shape of the first fixing block is bolt-shaped, and an annular groove is provided on the groove wall of the first through slot near the groove opening; the second through slot is symmetrically arranged on the second upper module, and an annular groove is provided on the groove wall of one of the second through slots near the groove opening; the relatively larger end of the first fixing block can enter the annular groove.

[0019] Preferably, an L-shaped groove is provided on the end face of the first fixing block, which has a relatively large size.

[0020] Preferably, the depths of slot 1 and slot 3 are equal; the second fixing block is cut into block 1 and block 2; a sliding groove is provided on block 2 to slide and connect with block 1; block 1 is located in slot 1 or slot 3; block 2 is located in slot 2 or slot 4; the thickness of block 1 is equal to the depth of slot 1; the end face of block 1 away from block 2 is concave arc-shaped and the concave arc surface matches the curvature of the inner wall of the lower mold 2; the thickness of block 2 is equal to the depth of slot 2.

[0021] Preferably, the upper surfaces of the second and third lower modules are provided with a first rectangular groove and a second rectangular groove; the first rectangular groove vertically penetrates the outer surface of the second lower module; the second rectangular groove vertically penetrates the outer surface of the third lower module.

[0022] Preferably, the second and third lower modules are provided with a first limiting groove and a second limiting groove; the rotating disk is provided with a corresponding first limiting block and a second limiting block.

[0023] Preferably, there are two No. 1 limiting slots on the No. 2 lower module and they are arranged symmetrically; there are two No. 2 limiting slots on the No. 3 lower module and they are arranged symmetrically; the No. 1 limiting block and the No. 2 limiting block are placed on the rotating disk, and the end faces of the No. 1 limiting block and the No. 2 limiting block that contact the rotating disk are roughened, for example, by sandblasting.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention enables the manufacture of prefabricated aluminum alloy wheels of different sizes and specifications by having workers disassemble and install the No. 1 upper module, No. 2 upper module, No. 2 lower module, and No. 3 lower module. This improves the effectiveness of the invention, reduces the need for replacing and storing prefabricated molds, enhances the performance of the original molds, reduces the cost of prefabricated molds, and increases the factory's profits.

[0026] 2. This invention allows workers to assemble the upper and lower molds, specifically the first upper module, the second upper module, the third upper module, the first lower module, the second lower module, and the third lower module. This enables the production of pre-forged parts of different specifications. Simultaneously, the second fixing block secures the first, second, and third lower modules, preventing relative rotation of the first lower module during rotation and ensuring the effectiveness of the invention.

[0027] 3. The present invention uses a fixing block to block the first through slot on the first upper module or the second through slot on the second upper module, thereby preventing the aluminum alloy block from softening due to high temperature and entering the first or second through slot when the first or second upper module contacts and pre-forges with the aluminum alloy block, thus improving the actual use effect of the present invention. Attached Figure Description

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] Figure 1 This is an overall structural diagram of the present invention;

[0030] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0032] Figure 4 This is a projected view of the upper mold in this invention;

[0033] Figure 5 This is a schematic diagram of the structure of the first limiting block and the second lower module in this invention;

[0034] In the diagram: 1. Support; 2. Rotating disk; 3. Lower mold; 31. Lower module 1; 32. Lower module 2; 33. Lower module 3; 34. Slot 1; 35. Slot 2; 36. Slot 3; 37. Slot 4; 38. Fixing block 2; 4. Upper mold; 41. Upper module 1; 42. Upper module 2; 43. Upper module 3; 44. Through slot 1; 45. Through slot 2 ; 46. No. 3 through slot; 47. No. 1 fixed block; 48. No. 1 round block; 49. No. 2 round block; 5. Annular slot; 51. L-shaped slot; 52. No. 1 block; 53. No. 2 block; 54. Sliding slot; 55. No. 1 rectangular slot; 56. No. 2 rectangular slot; 6. Drive mechanism; 7. No. 1 limiting slot; 71. No. 2 limiting slot; 72. No. 1 limiting block; 73. No. 2 limiting block; 8. Push rod. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] like Figures 1 to 5 As shown, the pre-forging die for an aluminum alloy wheel according to the present invention includes:

[0037] Bracket 1;

[0038] Rotating disk 2; Rotating disk 2 is rotatably connected to bracket 1;

[0039] Lower mold 3; Lower mold 3 is fixed on rotating disk 2;

[0040] Upper mold 4; Upper mold 4 is connected to bracket 1 via push rod 8;

[0041] Drive mechanism 6; Drive mechanism 6 is used to drive the rotating disk 2 to rotate;

[0042] The upper mold 4 is composed of upper module 41, upper module 42 and upper module 43; the lower mold 3 is composed of lower module 31, lower module 32 and lower module 33.

[0043] In actual production, one set of molds usually corresponds to one type of aluminum alloy wheel blank. Therefore, in the actual production process, the factory will store many different types of molds to cope with the production of aluminum alloy wheels of different types and specifications. This means that a lot of costs are spent on manufacturing molds, and a lot of space is occupied, which is not conducive to storage and mold replacement during forging.

[0044] Therefore, when using this invention, the operator first places the heated aluminum alloy block into the lower mold 3; the operator controls the drive mechanism 6 to drive the rotating disk 2 to rotate through the controller, and then controls the output end of the push rod 8 to move the upper mold 4 downward, so that the upper mold 4 contacts the aluminum alloy block and pre-forges the aluminum alloy block into a blank; when using the pre-forging mold of aluminum alloy wheel to pre-forge products of different sizes, the operator removes the second upper module 42 and the first upper module 41 on the upper mold 4, and then removes the third lower module 33 and the second lower module 32, so that the specifications of the upper mold 4 and the lower mold 3 can be changed to adapt to the production of aluminum alloy wheel preforms of different specifications;

[0045] This invention enables the manufacture of prefabricated aluminum alloy wheels of different sizes and specifications by having workers remove and install the first upper module 41, the second upper module 42, the second lower module 32, and the third lower module 33. This improves the effectiveness of the invention, reduces the need for replacing and storing prefabricated molds, enhances the performance of the original molds, reduces the cost of prefabricated molds, and increases the factory's profits.

[0046] As one embodiment of the present invention, the first lower module 31, the second lower module 32 and the third lower module 33 are annular in shape and their sizes decrease sequentially: the first lower module 31, the second lower module 32 and the third lower module 33 together form the lower mold 3;

[0047] The shape of the third upper module 43 is cylindrical; the shape of the second upper module 42 and the first upper module 41 is tubular; the first upper module 41, the second upper module 42 and the third upper module 43 together form the upper mold 4; the outer walls of the first upper module 41, the second upper module 42 and the third upper module 43 are respectively provided with a first through groove 44, a second through groove 45 and a third through groove 46; the same first fixing block 47 is slidably connected in the first through groove 44, the second through groove 45 and the third through groove 46.

[0048] In one embodiment of the present invention, a first groove 34 is provided on the inner wall of the first lower module 31; a second groove 35 and a third groove 36 are provided on the outer and inner walls of the second lower module 32, respectively; a fourth groove 37 is provided on the outer wall of the third lower module 33; the first groove 34, the second groove 35, the third groove 36 and the fourth groove 37 respectively penetrate the upper end faces of the first lower module 31, the second lower module 32 and the third lower module 33; the first groove 34 and the second groove 35 are slidably connected to the same second fixing block 38; the third groove 36 and the fourth groove 37 are connected to the same second fixing block 38.

[0049] During operation, the worker pulls out the first fixing block 47 from the first through slot 44, the second through slot 45, and the third through slot 46, thereby separating the first upper module 41, the second upper module 42, and the third upper module 43 from each other. Then, the worker installs the second upper module 42 and the first upper module 41 according to the shape and specifications of the aluminum alloy pre-forging. Similarly, the worker can pull out the second lower module 32 and the third lower module 33 from the first lower module 31, thereby separating the first lower module 31, the second lower module 32, and the third lower module 33 from each other. Then, the worker installs the second lower module 32 and the third lower module 33 according to the shape and specifications of the aluminum alloy pre-forging.

[0050] Workers remove lower module 33 and lower module 32, then place upper module 41 and upper module 42 onto upper module 43, and insert fixing block 47 into through slots 44, 45, and 46 to fix upper module 41 and upper module 42. At this point, upper mold 4 and lower mold 3 correspond to a pre-forged part of one size. Workers then remove lower module 33, install lower module 32, remove upper module 41, install upper module 42, and insert fixing block 47 into through slots 45 and 46, corresponding to a pre-forged part of another size. Workers then remove upper module 41 and upper module 42, install lower module 33 and lower module 32, corresponding to a pre-forged part of the last size.

[0051] When separating the No. 3 lower module 33 and the No. 2 lower module 32, the workers pull out the No. 2 fixing block 38 in the No. 3 slot 36 and the No. 4 slot 37, and then pull out the No. 3 lower module 33; when separating the No. 2 lower module 32 and the No. 1 lower module 31, the workers pull out the No. 2 fixing block 38 in the No. 1 slot 34 and the No. 2 slot 35, and then pull out the No. 2 lower module 32.

[0052] This invention enables the production of pre-forged parts of different specifications by having workers assemble the upper mold 4 and the lower mold 3, specifically the first upper module 41, the second upper module 42, the third upper module 43, the first lower module 31, the second lower module 32, and the third lower module 33. Simultaneously, the second fixing block 38 secures the first lower module 31, the second lower module 32, and the third lower module 33, ensuring that when the first lower module 31 is rotated, the other three modules do not rotate relative to each other, thus guaranteeing the effectiveness of the invention.

[0053] In one embodiment of the present invention, a first circular block 48 and a second circular block 49 are fixedly connected to the bottom of the first upper module 41 and the second upper module 42.

[0054] In one embodiment of the present invention, the length of the first fixing block 47 is the same as the outer diameter of the second upper module 42, the first fixing block 47 is bolt-shaped, and an annular groove 5 is provided on the groove wall of the first through groove 44 near the groove opening; the second through groove 45 is symmetrically arranged on the second upper module 42, and an annular groove 5 is provided on the groove wall of one of the second through grooves 45 near the groove opening; the larger end of the first fixing block 47 can enter the annular groove 5.

[0055] As one embodiment of the present invention, an L-shaped groove 51 is provided on the relatively large end face of the first fixing block 47.

[0056] During operation, the upper mold 4 and lower mold 3 are closed. During the pre-forging of the aluminum alloy block, the first circular block 48 and the second circular block 49, fixed to the first upper module 41 or the second upper module 42, first contact the aluminum alloy block. When the operator inserts the first fixing block 47 into the first through groove 44, the second through groove 45, and the third through groove 46, the larger end of the first fixing block 47 enters the annular groove 5, and the first fixing block 47 is stuck in the annular groove 5, completely filling the first through groove 46. 4; When the worker inserts the first fixing block 47 into the second through groove 45 and the third through groove 46, the larger end of the first fixing block 47 enters the annular groove 5, and the other end of the first fixing block 47 passes through the third through groove 46 and enters another second through groove 45. Both ends of the first fixing block 47 fill the second through groove 45. When the worker removes the first fixing block 47, he can insert his hand or fingers into the L-shaped groove 51 and pull the first fixing block 47, which makes it easier for the worker to remove the first fixing block 47.

[0057] The present invention uses a first fixing block 47 to block the first through slot 44 on the first upper module 41 or the second through slot 45 on the second upper module 42, thereby preventing the aluminum alloy block from softening due to high temperature and entering the first through slot 44 or the second through slot 45 when the first upper module 41 or the second upper module 42 contacts and pre-forges with the aluminum alloy block, thus improving the actual use effect of the present invention.

[0058] In one embodiment of the present invention, the depths of groove 34 and groove 36 are equal; the second fixing block 38 is cut into block 52 and block 53; a sliding groove 54 is provided on block 53 to slide and connect with block 52; block 52 is located in groove 34 or groove 36; block 53 is located in groove 35 or groove 37; the thickness of block 52 is equal to the depth of groove 34; the end face of block 52 away from block 53 is concave arc-shaped and the concave arc surface matches the curvature of the inner wall of the lower mold 32; the thickness of block 53 is equal to the depth of groove 35.

[0059] In one embodiment of the present invention, the upper surfaces of the second lower module 32 and the third lower module 33 are provided with a first rectangular groove 55 and a second rectangular groove 56; the first rectangular groove 55 vertically penetrates the outer surface of the second lower module 32; the second rectangular groove 56 vertically penetrates the outer surface of the third lower module 33.

[0060] In one embodiment of the present invention, the second lower module 32 and the third lower module 33 are provided with a first limiting groove 7 and a second limiting groove 71; the rotating disk 2 is provided with a corresponding first limiting block 72 and a second limiting block 73.

[0061] In one embodiment of the present invention, the number of first limiting grooves 7 on the second lower module 32 is two and symmetrically arranged; the number of second limiting grooves 71 on the third lower module 33 is two and symmetrically arranged; the first limiting block 72 and the second limiting block 73 are placed on the rotating disk 2, and the end faces of the first limiting block 72 and the second limiting block 73 that contact the rotating disk 2 are roughened, for example, by sandblasting.

[0062] During operation, when the lower module 31 is used as the lower mold 3, the worker inserts block 52 into slot 34, with one end of block 52 slidably connected to block 53 contacting the bottom of slot 34. Similarly, when the lower module 31 and lower module 32 are used as the lower mold 3, block 52 is inserted into slot 36, with one end of block 52 slidably connected to block 53 contacting the bottom of slot 36. This prevents the aluminum alloy block, which has softened at high temperature, from entering slot 34 or slot 36 during pre-forging. Within 6, this affects the quality of the pre-forged aluminum alloy wheel; when the workers place the second lower module 32 and the third lower module 33 into the first lower module 31, the second lower module 32 contacts the inclined surface of the first limiting block 72. The inclined surface of the first limiting block 72 guides the second lower module 32, causing the second lower module 32 to move along the inclined surface of the first limiting block 72, thus causing the second lower module 32 to rotate. The position of the first limiting block 72 is pre-set so that after the second lower module 32 rotates, the second lower module 32... Slot 35 aligns with slot 34 on lower module 31; thus, slot 35 on lower module 32 aligns with slot 34 on lower module 31; similarly, lower module 33 rotates under the action of limit block 73, slot 37 aligns with slot 36, limit block 72 enters limit slot 7 on lower module 32, and limit block 73 enters limit slot 71 on lower module 33; when the operator removes lower modules 32 and 33, they can... Lower modules 32 and 33 are pulled out through rectangular slots 55 and 56. Then, the staff removes limit blocks 72 and 73. The end faces of limit blocks 72 and 73 that contact the rotating disk 2 are roughened to increase the friction between limit blocks 72 and 73 and the rotating disk 2, thereby preventing the position of limit blocks 72 and 73 from changing when lower modules 32 and 33 rotate, thus affecting the positioning effect.

[0063] This invention prevents aluminum alloy blocks from entering slots 34 and 36 during pre-forging by having workers insert block 52 into slot 34 when lower module 31 is used as lower mold 3, and insert block 52 into slot 36 when lower modules 31 and 32 are used as lower molds 3. Simultaneously, limiting blocks 72 and 73 ensure automatic rotation of lower modules 32 and 33 during installation, preventing positional deviations between slots 34 and 35, and between slots 35 and 36, when lower modules 32 and 33 are placed into lower module 31, thus ensuring the applicability of this invention.

[0064] Example 1:

[0065] A pre-forging die for an aluminum alloy wheel, comprising:

[0066] Bracket 1;

[0067] Rotating disk 2; Rotating disk 2 is rotatably connected to bracket 1;

[0068] Lower mold 3; Lower mold 3 is fixed on rotating disk 2;

[0069] Upper mold 4; Upper mold 4 is connected to bracket 1 via push rod 8;

[0070] Drive mechanism 6; Drive mechanism 6 is used to drive the rotating disk 2 to rotate;

[0071] The upper mold 4 is composed of upper module 41, upper module 42 and upper module 43; the lower mold 3 is composed of lower module 31, lower module 32 and lower module 33.

[0072] In actual production, one set of molds usually corresponds to one type of aluminum alloy wheel blank. Therefore, in the actual production process, the factory will store many different types of molds to cope with the production of aluminum alloy wheels of different types and specifications. This means that a lot of costs are spent on manufacturing molds, and a lot of space is occupied, which is not conducive to storage and mold replacement during forging.

[0073] Therefore, when using this invention, the operator first places the heated aluminum alloy block into the lower mold 3; the operator controls the drive mechanism 6 to drive the rotating disk 2 to rotate through the controller, and then controls the output end of the push rod 8 to move the upper mold 4 downward, so that the upper mold 4 contacts the aluminum alloy block and pre-forges the aluminum alloy block into a blank; when using the pre-forging mold of aluminum alloy wheel to pre-forge products of different sizes, the operator removes the second upper module 42 and the first upper module 41 on the upper mold 4, and then removes the third lower module 33 and the second lower module 32, so that the specifications of the upper mold 4 and the lower mold 3 can be changed to adapt to the production of aluminum alloy wheel preforms of different specifications;

[0074] This invention enables the manufacture of prefabricated aluminum alloy wheels of different sizes and specifications by having workers remove and install the first upper module 41, the second upper module 42, the second lower module 32, and the third lower module 33. This improves the effectiveness of the invention, reduces the need for replacing and storing prefabricated molds, enhances the performance of the original molds, reduces the cost of prefabricated molds, and increases the factory's profits.

[0075] In this embodiment, the first lower module 31, the second lower module 32, and the third lower module 33 are circular in shape and their sizes decrease sequentially: the first lower module 31, the second lower module 32, and the third lower module 33 together form the lower mold 3;

[0076] The shape of the third upper module 43 is cylindrical; the shape of the second upper module 42 and the first upper module 41 is tubular; the first upper module 41, the second upper module 42 and the third upper module 43 can form concentric circles; the outer walls of the first upper module 41, the second upper module 42 and the third upper module 43 are respectively provided with a first through groove 44, a second through groove 45 and a third through groove 46; the same first fixing block 47 is slidably connected in the first through groove 44, the second through groove 45 and the third through groove 46.

[0077] In this embodiment, a first groove 34 is provided on the inner wall of the first lower module 31; a second groove 35 and a third groove 36 are provided on the outer and inner walls of the second lower module 32, respectively; a fourth groove 37 is provided on the outer wall of the third lower module 33; the first groove 34, the second groove 35, the third groove 36 and the fourth groove 37 pass through the upper end faces of the first lower module 31, the second lower module 32 and the third lower module 33, respectively; the first groove 34 and the second groove 35 are slidably connected to the same second fixing block 38; the third groove 36 and the fourth groove 37 are connected to the same second fixing block 38.

[0078] During operation, the worker pulls out the first fixing block 47 from the first through slot 44, the second through slot 45, and the third through slot 46, thereby separating the first upper module 41, the second upper module 42, and the third upper module 43 from each other. Then, the worker installs the second upper module 42 and the first upper module 41 according to the shape and specifications of the aluminum alloy pre-forging. Similarly, the worker can pull out the second lower module 32 and the third lower module 33 from the first lower module 31, thereby separating the first lower module 31, the second lower module 32, and the third lower module 33 from each other. Then, the worker installs the second lower module 32 and the third lower module 33 according to the shape and specifications of the aluminum alloy pre-forging.

[0079] Workers remove lower module 33 and lower module 32, then place upper module 41 and upper module 42 onto upper module 43, and insert fixing block 47 into through slots 44, 45, and 46 to fix upper module 41 and upper module 42. At this point, upper mold 4 and lower mold 3 correspond to a pre-forged part of one size. Workers then remove lower module 33, install lower module 32, remove upper module 41, install upper module 42, and insert fixing block 47 into through slots 45 and 46, corresponding to a pre-forged part of another size. Workers then remove upper module 41 and upper module 42, install lower module 33 and lower module 32, corresponding to a pre-forged part of the last size.

[0080] When separating the No. 3 lower module 33 and the No. 2 lower module 32, the workers pull out the No. 2 fixing block 38 in the No. 3 slot 36 and the No. 4 slot 37, and then pull out the No. 3 lower module 33; when separating the No. 2 lower module 32 and the No. 1 lower module 31, the workers pull out the No. 2 fixing block 38 in the No. 1 slot 34 and the No. 2 slot 35, and then pull out the No. 2 lower module 32.

[0081] This invention enables the production of pre-forged parts of different specifications by having workers assemble the upper mold 4 and the lower mold 3, specifically the first upper module 41, the second upper module 42, the third upper module 43, the first lower module 31, the second lower module 32, and the third lower module 33. Simultaneously, the second fixing block 38 secures the first lower module 31, the second lower module 32, and the third lower module 33, ensuring that when the first lower module 31 is rotated, the other three modules do not rotate relative to each other, thus guaranteeing the effectiveness of the invention.

[0082] In this embodiment, the bottom of the first upper module 41 and the second upper module 42 are fixedly connected to the first circular block 48 and the second circular block 49.

[0083] In this embodiment, the length of the first fixing block 47 is the same as the diameter of the outer side of the second upper module 42. The first fixing block 47 is bolt-shaped. The first through slot 44 has an annular groove 5 on the groove wall near the slot opening. The second through slot 45 is symmetrically arranged on the second upper module 42. One of the second through slots 45 has an annular groove 5 on the groove wall near the slot opening. The larger end of the first fixing block 47 can enter the annular groove 5.

[0084] In this embodiment, an L-shaped groove 51 is provided on the relatively large end face of the first fixing block 47.

[0085] During operation, the upper mold 4 and lower mold 3 are closed. During the pre-forging of the aluminum alloy block, the first circular block 48 and the second circular block 49, fixed to the first upper module 41 or the second upper module 42, first contact the aluminum alloy block. When the operator inserts the first fixing block 47 into the first through groove 44, the second through groove 45, and the third through groove 46, the larger end of the first fixing block 47 enters the annular groove 5, and the first fixing block 47 is stuck in the annular groove 5, completely filling the first through groove 46. 4; When the worker inserts the first fixing block 47 into the second through groove 45 and the third through groove 46, the larger end of the first fixing block 47 enters the annular groove 5, and the other end of the first fixing block 47 passes through the third through groove 46 and enters another second through groove 45. Both ends of the first fixing block 47 fill the second through groove 45. When the worker removes the first fixing block 47, he can insert his hand or fingers into the L-shaped groove 51 and pull the first fixing block 47, which makes it easier for the worker to remove the first fixing block 47.

[0086] The present invention uses a first fixing block 47 to block the first through slot 44 on the first upper module 41 or the second through slot 45 on the second upper module 42, thereby preventing the aluminum alloy block from softening due to high temperature and entering the first through slot 44 or the second through slot 45 when the first upper module 41 or the second upper module 42 contacts and pre-forges with the aluminum alloy block, thus improving the actual use effect of the present invention.

[0087] Example 2:

[0088] Refer to the instruction manual appendix Figure 3 The difference from Example 1 is as follows:

[0089] In this embodiment, the depths of slot 34 and slot 36 are equal; the second fixing block 38 is cut into block 52 and block 53; a sliding groove 54 is provided on block 53 to slide and connect with block 52; block 52 is located in slot 34 or slot 36; block 53 is located in slot 35 or slot 4; the thickness of block 52 is equal to the depth of slot 34; the end face of block 52 away from block 53 is concave arc-shaped and the concave arc surface matches the curvature of the inner wall of the lower mold 32; the thickness of block 53 is equal to the depth of slot 35.

[0090] In this embodiment, the upper surfaces of the second lower module 32 and the third lower module 33 are provided with a first rectangular groove 55 and a second rectangular groove 56; the first rectangular groove 55 vertically penetrates the outer side surface of the second lower module 32; the second rectangular groove 56 vertically penetrates the outer side surface of the third lower module 33.

[0091] In this embodiment, the second lower module 32 and the third lower module 33 are provided with a first limiting groove 7 and a second limiting groove 71; the rotating disk 2 is provided with a corresponding first limiting block 72 and a second limiting block 73.

[0092] In one embodiment of the present invention, the number of first limiting grooves 7 on the second lower module 32 is two and symmetrically arranged; the number of second limiting grooves 71 on the third lower module 33 is two and symmetrically arranged; the first limiting block 72 and the second limiting block 73 are placed on the rotating disk 2, and the end faces of the first limiting block 72 and the second limiting block 73 that contact the rotating disk 2 are roughened, for example, by sandblasting.

[0093] During operation, when the lower module 31 serves as the lower mold 3, the worker inserts block 52 into slot 34, with one end of block 52 slidably connected to block 53 contacting the bottom of slot 34. Similarly, when both lower modules 31 and 32 serve as the lower mold 3, block 52 is inserted into slot 36, with one end of block 52 slidably connected to block 53 contacting the bottom of slot 36. This prevents the aluminum alloy block from softening at high temperatures during pre-forging. The aluminum alloy block enters slot 1 (34) or slot 3 (36), affecting the quality of the pre-forged aluminum alloy wheel. When the worker places lower module 2 (32) and lower module 33 into lower module 1 (31), lower module 2 (32) contacts the inclined surface of limit block 72. The inclined surface of limit block 72 guides lower module 2 (32), causing it to move along the inclined surface of limit block 72, thus rotating lower module 2 (32). The second slot 35 on the upper module 32 aligns with the first slot 34 on the lower module 31; similarly, the lower module 33 rotates under the action of the second limiting block 73, the fourth slot 37 aligns with the third slot 36, the first limiting block 72 enters the first limiting slot 7 on the lower module 32, and the second limiting block 73 enters the second limiting slot 71 on the lower module 33; when the operator removes the lower module 32 and the lower module 33, they can pass through the first rectangular slot 55 and the second rectangular slot. 56. Pull out the second lower module 32 and the third lower module 33. Then, the staff takes out the first limit block 72 and the second limit block 73. The end faces of the first limit block 72 and the second limit block 73 that contact the rotating disk 2 are roughened to increase the friction between the first limit block 72 and the second limit block 73 and the rotating disk 2, thereby preventing the position of the first limit block 72 and the second limit block 73 from changing when the second lower module 32 and the third lower module 33 rotate, thus affecting the positioning effect.

[0094] This invention prevents aluminum alloy blocks from entering slots 34 and 36 during pre-forging by having workers insert block 52 into slot 34 when lower module 31 is used as lower mold 3, and insert block 52 into slot 36 when lower modules 31 and 32 are used as lower molds 3. Simultaneously, limiting blocks 72 and 73 ensure automatic rotation of lower modules 32 and 33 during installation, preventing positional deviations between slots 34 and 35, and between slots 35 and 36, when lower modules 32 and 33 are placed into lower module 31, thus ensuring the applicability of this invention.

[0095] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 2 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0096] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-forging die of an aluminum alloy wheel, comprising: a support; a rotating disc; the rotating disc is rotatably connected with the support; a lower die; the lower die is fixed on the rotating disc; an upper die; the upper die is connected with the support through a push rod; a driving mechanism; the driving mechanism is used for driving the rotating disc to rotate; characterized in that the upper die is composed of a first upper die block, a second upper die block and a third upper die block; the third upper die block is fixedly connected with the output end of the push rod; the lower die is composed of a first lower die block, a second lower die block and a third lower die block; the first lower die block is fixedly connected with the rotating disc; the first lower die block, the second lower die block and the third lower die block are circular in shape and decrease in size in sequence; the first lower die block, the second lower die block and the third lower die block together form the lower die; the third upper die block is cylindrical in shape; the second upper die block and the first upper die block are tubular in shape; the first upper die block, the second upper die block and the third upper die block together form the upper die; the first upper die block, the second upper die block and the third upper die block are respectively provided with a first through slot, a second through slot and a third through slot on the outer wall thereof; the first through slot, the second through slot and the third through slot are slidably connected with a same first fixing block; a first slot is arranged on the inner wall of the first lower die block; a second slot and a third slot are respectively arranged on the outer wall and the inner wall of the second lower die block; a fourth slot is arranged on the outer wall of the third lower die block; the first slot, the second slot, the third slot and the fourth slot respectively penetrate the upper end faces of the first lower die block, the second lower die block and the third lower die block; the first slot and the second slot are slidably connected with a same second fixing block; the third slot and the fourth slot are connected with a same second fixing block; a first circular block and a second circular block are fixedly connected with the bottoms of the first upper die block and the second upper die block; the length of the first fixing block is the same as the diameter of the outer side of the second upper die block; the first fixing block is bolt-shaped; an annular groove is arranged on the slot wall of the first through slot close to the slot opening; the second through slots are symmetrically arranged on the second upper die block; one of the second through slots is provided with an annular groove on the slot wall close to the slot opening; the end of the first fixing block with a relatively large size can enter the annular groove; an L-shaped slot is arranged on the end face of the first fixing block with a relatively large size; the depths of the first slot and the third slot are equal; the second fixing block is cut into a first block and a second block; the second block is provided with a sliding slot and slidably connected with the first block; the first block is located in the first slot or the third slot; the second block is located in the second slot or the fourth slot; the thickness of the first block is equal to the depth of the first slot; the end face of the first block away from the second block is concave-arc-shaped and the concave-arc face is consistent with the curvature of the inner wall of the second lower die; the thickness of the second block is equal to the depth of the second slot; a first rectangular slot and a second rectangular slot are arranged on the upper end faces of the second lower die block and the third lower die block; the first rectangular slot vertically penetrates the outer side of the second lower die block; the second rectangular slot vertically penetrates the outer side of the third lower die block; a first limiting slot and a second limiting slot are arranged on the second lower die block and the third lower die block; a first limiting block and a second limiting block are correspondingly arranged on the rotating disc; The number of the first limiting grooves on the second lower module is two and symmetrically arranged; the number of the second limiting grooves on the third lower module is two and symmetrically arranged; the first limiting block and the second limiting block are placed on the rotating disc, and the end surface of the first limiting block and the second limiting block in contact with the rotating disc is roughened; When the workers use the preforming die of the aluminum alloy wheel to preform products of different sizes, the workers disassemble the second upper module and the first upper module on the upper die, and then disassemble the third lower module and the second lower module, so that the specifications of the upper die and the lower die are changed, and the preform block of the aluminum alloy wheel of different specifications can be produced; by the workers putting the first block into the first groove when the first lower module is used as the lower die, and putting the first block into the third groove when the first lower module and the second lower module are used as the lower die, the aluminum alloy block is prevented from entering the first groove and the third groove during preforming; meanwhile, the second lower module and the third lower module are automatically rotated during installation by the first limiting block and the second limiting block, so that the position deviation of the first groove and the second groove, the second groove and the third groove when the workers put the second lower module and the third lower module into the first lower module is prevented, and the workers are prevented from being difficult to rotate; By plugging the first through groove on the first upper module or the second through groove on the second upper module with the first fixed block, the aluminum alloy block is prevented from entering the first through groove or the second through groove due to softening caused by high temperature when the first upper module or the second upper module is in contact with the aluminum alloy block and preformed.

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