Trimming and punching anti-deformation compound die for aluminum alloy steering knuckle and using method thereof

Abstract

The invention belongs to the technical field of aluminum alloy die forging, and particularly discloses an aluminum alloy steering knuckle trimming and punching anti-deformation compound die and a using method thereof. The mold frame is detachably arranged between the anvil block and the punching machine; the mold is detachably arranged in the mold frame; through the integrated design that the upper die assembly, the punch assembly and the anti-deformation assembly are achieved in one die, the trimming and punching operation of forgings is completed in one stroke of a punching machine, the forgings are prevented from deforming, the die investment cost and the equipment occupancy rate are reduced, conveying of the forgings among different working procedures is omitted, and the production efficiency is improved. Therefore, the problems that in forging production, the number of dies is large, the working procedure is single, the technological process is long, and the production efficiency and the yield are low are solved. And secondly, due to the detachable design of the mold frame and the mold, the mold frame and the mold can be suitable for large-scale production and also suitable for a multi-variety and small-batch production environment, and therefore the production capacity of an enterprise is remarkably improved, and the market response speed of the enterprise is remarkably increased.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum alloy die forging, and more specifically, relates to an aluminum alloy steering knuckle trimming and punching anti-deformation composite die and a use method thereof. Background Art

[0002] With the application of lightweight materials in automobiles and the growth of energy-saving demand, the market demand for aluminum alloy steering knuckles continues to rise due to their light weight, high strength and corrosion resistance. The advancement of precision casting and forging technology ensures the structural stability and safety of aluminum steering knuckles.

[0003] In the prior art, a Chinese patent with document number CN217315404U discloses an aluminum alloy steering knuckle inclined hole punch device, which includes an upper die seat and a lower punch for placing the steering knuckle, the upper die seat is slidably connected with a pressing module, a nitrogen spring is arranged between the pressing module and the upper die seat, a punch seat is fixed to the upper die seat, a punch is fixed to the bottom end of the punch seat, the bottom end face of the punch is adapted to the bottom of the fork of the steering knuckle, and the edges around the bottom end of the punch are cutting edges, the lower punch and the pressing module are provided with a through hole vertically penetrating both, and the punch is arranged in the through hole of the pressing module.

[0004] Although the above patent can improve the problem of local stress damage of the punch of the inclined hole punch device, however, with the development of the automobile industry, the demand for various forgings is increasing. For traditional workpiece forging, each process requires a separate mold and equipment, which not only increases production time and cost, but also easily introduces cumulative errors, and also makes it difficult to adapt to the large-scale and high-precision production requirements of automotive parts. Especially for some metals with a narrow forging temperature range, such as aluminum alloy castings, if the process is too long and the forging temperature drops too much, it needs to be reheated, resulting in long production time and energy waste. Therefore, in order to improve production efficiency and reduce resource consumption, a composite mold with multiple processing capabilities is urgently needed to adapt to the requirements of aluminum alloy forging for short process and high efficiency. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides an aluminum alloy steering knuckle trimming and punching anti-deformation composite die and a use method thereof, which realizes an integrated design of an upper die assembly, a punch assembly and an anti-deformation assembly in a pair of the above-mentioned dies, so that the trimming and punching operations of the forgings can be completed in one stroke of the punching machine and deformation of the forgings can be avoided, thereby reducing the investment cost of the die and the equipment occupancy rate, and eliminating the need to transfer the forgings between different processes, thereby solving the problems of a large number of dies, a single process, a long process flow, and low production efficiency and yield rate in forging production; secondly, the detachable design of the die frame and the die can be suitable for large-scale production, as well as for a production environment with multiple varieties and small batches, thereby significantly improving the production capacity and market response speed of the enterprise.

[0006] In order to achieve the above-mentioned object, the present invention provides, on one hand, a composite die for trimming and punching of aluminum alloy steering knuckle to prevent deformation, comprising: a die frame and a die, wherein:

[0007] The die frame is detachably arranged between the anvil and the punching machine, and is used to stably support the die and transmit the vertical load of the punching machine and the vertical ejection force of the anvil;

[0008] The mold is detachably arranged inside the mold frame, and includes: an upper mold assembly, a lower mold assembly, a punch assembly and an anti-deformation assembly; the upper mold assembly is detachably connected to the upper mold base; the lower mold assembly is detachably connected to the lower mold base; the punch assembly is connected to the upper mold assembly; the anti-deformation assembly is slidably connected to the upper mold assembly;

[0009] By integrating the upper die assembly, the punch assembly and the anti-deformation assembly in a pair of the above-mentioned dies, the trimming and punching operations of the forgings can be completed in one stroke of the punching machine and the deformation of the forgings can be avoided.

[0010] Furthermore, the mold frame includes: a lower mold base, an upper mold base, a first guide member, a first cushion block, a second cushion block, a mold change stop block, a mold pressing block and a nitrogen spring, wherein:

[0011] The lower die base and the upper die base are connected via a plurality of the first guide members;

[0012] The first cushion block and the second cushion block are arranged parallel to the upper end of the lower die base;

[0013] The lower die base and the first cushion block are provided with corresponding through holes, and are adapted to the ejector rod of the anvil at the bottom end of the lower die base;

[0014] The two mold-changing stop blocks are respectively arranged on the left side of the first cushion block and the right side of the second cushion block, and the upper surface of the mold-changing stop block is higher than the upper surfaces of the first cushion block and the second cushion block;

[0015] The mold pressing block is slidably connected to the upper mold base through a slot at the bottom end of the upper mold base;

[0016] The nitrogen spring is arranged at the bottom end of the upper die seat.

[0017] Furthermore, the upper mold assembly includes: an upper pad, an upper clamping plate, an upper mold pad and an upper mold, wherein:

[0018] The upper pad is connected to the upper die seat through the die pressing block;

[0019] The upper pad, the upper clamping plate, the upper mold pad and the upper mold are connected in sequence through a plurality of screws and tapping pins and are arranged at the bottom end of the upper mold.

[0020] Furthermore, the lower mold assembly includes: a lower mold pad, a lower mold, a lower mold ejector rod and a second guide member, wherein:

[0021] The lower mold pad is detachably connected to the first pad and the second pad through a plurality of slots at the lower ends of the front and rear sides and adapted fastening screws or bolts;

[0022] The lower mold is arranged on the upper end of the lower mold pad;

[0023] One end of the lower die ejector pin is not higher than the upper surface of the lower die, and the other end of the lower die ejector pin sequentially passes through the lower die, the lower die pad, the second pad and the lower die seat to contact the ejector device provided on the anvil;

[0024] A plurality of the second guide members are arranged between the upper mold pad and the lower mold pad.

[0025] Furthermore, the punch assembly includes: a first punch and a second punch; one end of the first punch and the second punch are in contact with the upper pad, and the other end passes through the upper clamping plate, the upper mold pad and the upper mold in sequence.

[0026] Furthermore, the lower die pad and the lower die are both provided with through holes connected to the first punch and the second punch, and the through holes are connected to the waste material extraction port between the first cushion block and the second cushion block.

[0027] Furthermore, the anti-deformation assembly includes: an upper pressing plate and an upper die ejector, wherein:

[0028] The upper pressing plate is slidably connected to the upper mold pad and the upper mold through a plurality of screws, the upper pad and the matching through holes on the upper clamping plate;

[0029] The upper die push rod passes through the upper pad and the upper clamping plate, and both ends thereof are in contact with the nitrogen spring and the upper pressing plate respectively.

[0030] Furthermore, the mold further comprises a discharge assembly, which is detachably arranged at the upper end of the lower mold base, and comprises: a discharge cylinder, a discharge plate and a third guide member, wherein:

[0031] The two unloading cylinders are detachably arranged at the upper ends of the lower die base on the left and right sides of the lower die, and the two unloading cylinders are connected to the two sides of the unloading plate through connecting pieces respectively;

[0032] The stripper plate is sleeved on the outer side of the lower mold;

[0033] The third guide member is arranged between the stripper plate and the lower mold pad.

[0034] Furthermore, the first guide members are ball guide pins and guide sleeves and the number of the first guide members is at least two;

[0035] The second guide members are ball guide pins and guide sleeves and the number of the second guide members is at least two;

[0036] The third guide member is a guide post and the number of the third guide member is at least one.

[0037] Another aspect of the present invention provides a method for using a composite die for trimming and punching an aluminum alloy steering knuckle to prevent deformation, which is implemented by using the composite die as described above and comprises the following steps:

[0038] S1: According to the type of forging to be processed, the appropriate die is assembled into the die frame through the upper die assembly and the lower die assembly;

[0039] S2: placing the forging on the upper end of the lower die, and applying a vertical load to the upper die seat by the punching machine, so that the upper die seat drives the upper die assembly to move downward, and the upper pressing plate contacts the forging first to close the die;

[0040] S3: The upper die seat continues to move downward, compressing the nitrogen spring, and providing back pressure to the upper pressing plate through the nitrogen spring to ensure that the forging does not loosen during the operation;

[0041] S4: the upper die seat continues to move downward, the upper die, the first punch and the second punch contact the forging respectively, and then the trimming and punching operation is completed;

[0042] S5: the upper die seat returns to the initial position, the cut-off forging flash is stuck on the outer side of the lower die, and the punched skin falls to the waste material taking port between the first cushion block and the second cushion block and is taken by the robot arm. After that, the robot takes away the forging that has completed the trimming and punching operation;

[0043] S6: The two unloading cylinders rise to drive the unloading plate to eject the forging flash and remove it through the robot, after which the two unloading cylinders return to their initial positions;

[0044] S7: Repeat steps S2 to S6 to complete the processing of this type of forgings. If other types of forgings need to be processed, repeat steps S1 to S6.

[0045] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0046] 1. The composite die of the present invention realizes an integrated design of the upper die assembly, the punch assembly and the anti-deformation assembly in a pair of the above-mentioned dies, so that the trimming and punching operations of the forgings can be completed in one stroke of the punching machine and the deformation of the forgings can be avoided, thereby reducing the investment cost of the die and the equipment occupancy rate, and eliminating the need to transfer the forgings between different processes, thereby solving the problems of a large number of dies, a single process, a long process flow, and low production efficiency and yield rate in forging production; secondly, the detachable design of the die frame and the die can be applied to large-scale production as well as to a production environment of multiple varieties and small batches, thereby significantly improving the production capacity and market response speed of the enterprise.

[0047] 2. The composite mold of the present invention is connected to the punching machine and the upper end of the mold respectively through the upper mold base, the mold pressing block and the bolts, connected to the anvil through the lower mold base, and connected to the bottom end of the mold through the first pad and the second pad. A plurality of the first guide members are arranged between the lower mold base and the upper mold base, so as to ensure the precise alignment of the mold and provide stable support, which also helps to simplify the mold changing process, reduce the mold changing time, improve the flexibility and response speed of the production line, and thus improve the service life and production efficiency of the mold; secondly, the two mold changing stop blocks respectively arranged on the left side of the first pad and the right side of the second pad are used to further limit the position of the mold in cooperation with the first pad and the second pad to ensure that the mold always remains in the correct horizontal position during installation and use to prevent its displacement, thereby significantly improving product quality.

[0048] 3. The composite mold of the present invention makes the first cushion block and the second cushion block non-contact and is provided with a waste material collection port to facilitate the collection of waste after punching, thereby improving the cleanliness of the composite mold working area and enhancing production safety.

[0049] 4. The composite die of the present invention, by arranging the die inside the die frame and under the vertical load of the punching machine, drives the punch assembly and the anti-deformation assembly to perform trimming, punching and anti-deformation operations on the forging at the same time through the mutual extrusion between the upper die assembly and the lower die assembly, so that multiple processes can be completed in one operation, which significantly improves production efficiency and product quality. At the same time, the lower die base and the upper die base can avoid interference with the die by external factors, ensuring the stability and safety of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a structural schematic diagram of the assembly of a mold frame and a mold according to an embodiment of the present invention;

[0051] Figure 2 It is a front view of the assembly of the mold frame and the mold according to the embodiment of the present invention;

[0052] Figure 3A side view of the assembly of the mold frame and the mold according to an embodiment of the present invention;

[0053] Figure 4 It is a cross-sectional view at AA of an embodiment of the present invention;

[0054] Figure 5 It is a schematic diagram of the structure of a mold frame according to an embodiment of the present invention;

[0055] Figure 6 This is a schematic structural diagram of the right mold of an embodiment of the present invention;

[0056] Figure 7 The figure is a schematic flow chart of the steps of the method for using the composite membrane according to an embodiment of the present invention.

[0057] In all the drawings, the same figure marks represent the same technical features, specifically: 1-die frame, 11-lower die base, 12-upper die base, 13-first guide, 14-first cushion block, 15-second cushion block, 16-mold change stop block, 17-die pressing block, 18-nitrogen spring, 2-die, 21-upper die assembly, 211-upper pad, 212-upper clamp, 213-upper die pad, 214-upper die, 22-lower die assembly, 221-lower die pad, 222-lower die, 223-lower die push rod, 224-second guide, 23-punch assembly, 231-first punch, 232-second punch, 24-anti-deformation assembly, 241-upper pressure plate, 242-upper die push rod, 25-unloading assembly, 251-unloading cylinder, 252-unloading plate, 253-third guide. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0059] Example 1

[0060] like Figures 1 to 5As shown, embodiment 1 of the present invention provides an aluminum alloy steering knuckle trimming and punching anti-deformation composite die, comprising: a die frame 1 and a die 2; the die frame 1 is detachably arranged between an anvil and a punching machine; the die 2 is detachably arranged inside the die frame 1; during use, by integrating the upper die assembly 21, the punch assembly 22 and the anti-deformation assembly 24 in a pair of the die 2, the trimming and punching operations of the forgings are completed in one stroke of the punching machine and the deformation of the forgings is avoided, the investment cost of the die and the equipment occupancy rate are reduced, and the transfer of the forgings between different processes is omitted, thereby solving the problems of a large number of dies, a single process, a long process flow, and low production efficiency and yield rate in forging production; secondly, the detachable design of the die frame 1 and the die 2 is suitable for large-scale production, and is also suitable for a production environment with multiple varieties and small batches, thereby significantly improving the production capacity and market response speed of the enterprise.

[0061] Specifically, Figures 1 to 5As shown, the mold frame 1 is detachably arranged between the anvil and the punching machine, and is used to stably support the mold 2 and transmit the vertical load of the punching machine and the vertical ejection force of the anvil. The mold frame 1 includes: a lower mold base 11, an upper mold base 12, a first guide member 13, a first cushion block 14, a second cushion block 15, a mold change stop block 16, a mold pressing block 17 and a nitrogen spring 18; the lower mold base 11 and the upper mold base 12 are connected by a plurality of the first guide members 13; the first cushion block 14 and the second cushion block 15 are arranged in parallel at the upper end of the lower mold base 11; the lower mold base 11 and the first cushion block 14 are provided with corresponding through holes, and are adapted to the top rod of the anvil at the bottom end of the lower mold base 11; two mold change stop blocks 16 are respectively arranged on the left side of the first cushion block 14 and the right side of the second cushion block 15, and the upper surface of the mold change stop block 16 is higher than the upper surface of the first cushion block 14 and the second cushion block 15; the mold pressing block 17 is slidably connected to the upper mold base 12 through the slot at the bottom end of the upper mold base 12; the nitrogen spring 18 is arranged at the bottom end of the upper mold base 12. During use, the punching machine and the upper end of the mold 2 are respectively connected through the upper mold base 2, the mold pressing block 17 and bolts, the anvil is connected through the lower mold base 12, and the bottom end of the mold 2 is connected through the first pad block 14 and the second pad block 15. A number of the first guide members 13 are also arranged between the lower mold base 11 and the upper mold base 12, so as to ensure the precise alignment of the mold 2 and provide stable support, which also helps to simplify the mold changing process, reduce the mold changing time, improve the flexibility and response speed of the production line, and thus improve the service life and production efficiency of the mold 2; secondly, the two mold changing stop blocks 16 respectively arranged on the left side of the first pad block 14 and the right side of the second pad block 15, cooperate with the first pad block 14 and the second pad block 15 to further limit the position of the mold 2, so as to ensure that the mold always remains in the correct horizontal position during installation and use to prevent its displacement, thereby significantly improving product quality.

[0062] Preferably, a plurality of detachable lifting rings are respectively provided on the outer sides of the lower mold base 11 and the upper mold base 12 for conveniently lifting the mold frame 1, thereby simplifying the assembly process and improving the stability of the assembly.

[0063] Preferably, a plurality of positioning pins are provided at the bottom end of the lower die base 11 to improve the accuracy of connection with the anvil.

[0064] Preferably, a plurality of slots are provided at the front and rear lower ends of the lower die base 11 and the front and rear upper ends of the upper die base 12, which are used to detachably connect the anvil and the punch through fastening bolts adapted thereto and slots on the anvil and the punch adapted thereto, thereby reducing the difficulty of installation and improving the installation accuracy.

[0065] In particular, a plurality of slots at the lower ends of the front and rear sides of the lower die base 11 are provided with baffles to prevent forging waste chips from entering the slots, thereby improving safety.

[0066] Preferably, a plurality of slots are provided at the lower ends of the front and rear sides of the upper mold base 12 and the upper ends of the front and rear sides of the first cushion block 14 and the second cushion block 15 for detachably connecting the mold 2 via matching fastening screws or bolts, thereby ensuring the stability of the mold 2 during operation.

[0067] It should be noted that the fastening bolts are connected and fixed on the parts that are detachably connected to each other through slots provided at corresponding positions. In an optional embodiment, one of the slots for detachably connecting the parts is a T-slot, and one end of the screw of the fastening bolt is provided with a T-shaped head that matches it, and the other corresponding slot is a T-slot with arc edges to accommodate the sizes of the screw, nut and gasket respectively, and reserve space for a countersunk hole for tightening the nut using non-electric tools or electric tools.

[0068] Preferably, the first guide member 13 is a ball guide post and a guide sleeve and the number is at least two, so as to reduce friction resistance and improve guiding accuracy and service life.

[0069] Preferably, the first cushion block 14 and the second cushion block 15 are not in contact with each other and are provided with a waste material taking port for collecting waste materials after punching, so as to improve the cleanliness of the working area of ​​the composite mold and enhance production safety.

[0070] Specifically, Figures 1 to 5 As shown, the mold 2 is detachably arranged inside the mold frame 1, and is used for multi-process processing of the aluminum alloy steering knuckle. The mold 2 includes: an upper mold assembly 21, a lower mold assembly 22, a punch assembly 23 and an anti-deformation assembly 24; the upper mold assembly 21 is detachably connected to the upper mold base 12; the lower mold assembly 22 is detachably connected to the lower mold base 11; the punch assembly 23 is connected to the upper mold assembly 21; and the anti-deformation assembly 24 is slidably connected to the upper mold assembly 21. During use, the die 2 is arranged inside the die frame 1, and under the vertical load of the punching machine, the upper die assembly 21 and the lower die assembly 22 are squeezed each other, so that the punch assembly 23 and the anti-deformation assembly 24 are driven to perform trimming, punching and anti-deformation operations on the forging at the same time, so that multiple processes can be completed in one operation, which significantly improves production efficiency and product quality. At the same time, the lower die base 11 and the upper die base 12 can avoid interference with the die 2 by external factors, ensuring the stability and safety of the production process.

[0071] Furthermore, the upper mold assembly 21 is used to support other parts, and includes: an upper pad 211, an upper clamping plate 212, an upper mold pad 213 and an upper mold 214; the upper pad 211 is connected to the upper mold base 12 through the mold pressing block 17; the upper pad 211, the upper clamping plate 212, the upper mold pad 213 and the upper mold 214 are connected in sequence through a number of screws and tapping pins and are arranged at the bottom of the upper mold 214, so as to ensure the stability and precise alignment of the upper mold assembly and reduce the difficulty of disassembly and maintenance.

[0072] Furthermore, the lower die assembly 22 is used to cooperate with the upper die assembly 21 to stably clamp the forging to achieve convenient processing of the steering knuckle, which includes: a lower die pad 221 and a lower die 222; the lower die pad 221 is detachably connected to the first pad 14 and the second pad 15 respectively through a plurality of slots at the lower ends of the front and rear sides and suitable fastening screws or bolts; the lower die 222 is arranged at the upper end of the lower die pad 221.

[0073] Preferably, a plurality of positioning pins are provided at the bottom end of the lower mold pad 221 , and corresponding mounting holes are provided at the upper ends of the first cushion block 14 and the second cushion block 15 , so as to improve the mounting accuracy of the lower mold assembly 22 on the lower mold base 11 .

[0074] Preferably, a plurality of positioning pins are provided at the bottom end of the lower mold 222 , and corresponding mounting holes are provided at the upper end of the lower mold pad 221 , so as to improve the assembly accuracy of the lower mold assembly 22 .

[0075] Preferably, the lower die assembly 22 also includes a lower die push rod 223, one end of which is not higher than the upper surface of the lower die 222, and the other end of which passes through the lower die 222, the lower die pad 221, the second pad 15 and the lower die base 11 in sequence to contact the ejection device provided on the anvil, so as to eject the forging after trimming and punching.

[0076] Preferably, the lower mold assembly 22 also includes a second guide member 224, and a plurality of the second guide members 224 are arranged between the upper mold pad 213 and the lower mold pad 221; there are at least two second guide members, and when there are two, they are symmetrically arranged around the center of the lower mold pad 221 to further improve the accuracy of the up and down movement of the component.

[0077] Preferably, the second guide member 224 is a ball guide post and guide sleeve to reduce friction resistance and improve guiding accuracy and service life.

[0078] It can be understood that, through the vertical load of the punching machine, the upper die 214 descends toward the lower die 222 and squeezes the forging, thereby achieving the trimming operation of the forging.

[0079] Further, the punch assembly 23 is used for punching the steering knuckle, and includes: a first punch 231 and a second punch 232; one end of the first punch 231 and the second punch 232 are both in contact with the upper pad 211, and the other end passes through the upper clamping plate 212, the upper die pad 213 and the upper die 214 in sequence. It can be understood that the first punch 231 and the second punch 232 are embedded in the multi-layer cylindrical mounting hole with a width on the top and a narrowness on the bottom in the upper clamping plate 212, and the punch assembly 23 at least includes the first punch 231 and the second punch 232, and it can include three or four different punches and select to add punching holes and replace the upper die assembly 21 and the lower die assembly 22 with corresponding multiple mounting holes according to the forging to be processed.

[0080] Preferably, the lower mold pad 221 and the lower mold 222 are both provided with through holes connected to the first punch 231 and the second punch 232, and the through holes are connected to the waste material removal port between the first cushion block 14 and the second cushion block 15 to facilitate the removal of waste and improve cleanliness and safety.

[0081] In an optional embodiment, a suitable waste basket is provided in the waste material taking port, and a handle or ear plate is provided on the front and / or rear side of the waste basket for easy robot grasping, so as to prevent waste chips from falling, further improve the cleanliness and safety, and effectively improve the level of intelligence.

[0082] Furthermore, the anti-deformation component 24 is used to achieve the anti-deformation effect of the forging during trimming and punching, and includes: an upper pressure plate 241 and an upper die push rod 242; the upper pressure plate 241 is slidably connected to the upper die pad 213 and the upper die 214 through a plurality of screws, the upper pad 211 and the upper clamping plate 212 through the matching through holes; the upper die push rod 242 passes through the upper pad 211 and the upper clamping plate 212 and its two ends are respectively in contact with the nitrogen spring 18 and the upper pressure plate 241, so as to pass the The nitrogen spring 18 converts the vertical load of the punching machine into a uniform back pressure on the upper pressing plate 241, thereby ensuring that it cooperates with the lower die 222 to clamp the forging, avoid loosening of the forging during trimming and punching, and achieve an anti-deformation effect; secondly, after the trimming and stamping operation is completed, when the upper die 214 rises away from the lower die 222, the upper pressing plate 241 can provide downward pressure on the forging through the back pressure provided by the nitrogen spring 18, thereby avoiding the occurrence of the forging and the punch assembly 23 not being separated, thereby improving production quality.

[0083] Furthermore, the mold 2 also includes a discharge assembly 25 for performing flash discharge operations, and the discharge assembly 25 is detachably arranged at the upper end of the lower mold base 11, and includes: a discharge cylinder 251, a discharge plate 252 and a third guide member 253; the two discharge cylinders 251 are respectively detachably arranged at the upper end of the lower mold base 12 on the left and right sides of the lower mold 222, and the two discharge cylinders 251 are respectively connected to the two sides of the discharge plate 252 through connecting members; the discharge plate 252 is sleeved on the outer side of the lower mold 222; the third guide member 253 is arranged between the discharge plate 252 and the lower mold pad 221, and is used for accurately guiding the process in which the discharge cylinder 251 drives the discharge plate 252 to move up and down to eject the flash, thereby improving production efficiency and product quality.

[0084] Preferably, the third guide member is a guide column and the number is at least one, so as to improve the burr unloading accuracy.

[0085] Preferably, a plurality of detachable lifting rings may be respectively provided on the outer sides of the upper pad 211, the upper clamping plate 212, the upper mold pad 213 and the lower mold pad 221 for conveniently lifting the mold 2, thereby simplifying the assembly process and improving the stability of the assembly.

[0086] It should be noted that if Figures 1 to 6 As shown, the automobile steering knuckle can be divided into a left and right steering knuckle according to actual use requirements. The forging of the left and right dies requires forging respectively, and the structures of the left and right dies are usually mirror-symmetrical, and can be conveniently loaded and unloaded and forged using the same die frame 1 to ensure that the left and right steering knuckles match in shape and size, so that the steering performance of the left and right sides of the automobile is consistent, and at the same time, the production cost is reduced; in particular, the die 2 in this embodiment is a left die, and the right die structure is mirror-symmetrical to the left die structure.

[0087] Example 2

[0088] like Figure 7 As shown, based on Example 1, Example 2 of the present invention provides a method for using an aluminum alloy steering knuckle trimming and punching anti-deformation composite die, comprising the following steps:

[0089] S1: According to the type of forging to be processed, the adapted die 2 is assembled into the die frame 1 through the upper die assembly 21 and the lower die assembly 22;

[0090] S2: The forging is placed on the upper end of the lower die 222, and the punch press applies a vertical load to the upper die base 12, so that the upper die base 12 drives the upper die assembly 21 to move downward, and the upper pressing plate 241 first contacts the forging to close the die;

[0091] S3: The upper die seat 12 continues to move downward, compressing the nitrogen spring 18, and providing back pressure to the upper pressing plate 241 through the nitrogen spring 18 to ensure that the forging does not loosen during the operation;

[0092] S4: the upper die holder 12 continues to move downward, the upper die 214, the first punch 231 and the second punch 232 contact the forging respectively, and then the trimming and punching operation is completed;

[0093] S5: the upper die seat 12 returns to the initial position, the cut-off forging flash is stuck on the outer side of the lower die 222, and the punched skin falls to the waste material taking port between the first cushion block 14 and the second cushion block 15 and is taken by the robot hand. After that, the robot takes away the forging that has completed the trimming and punching operation;

[0094] S6: The two unloading cylinders 251 rise to drive the unloading plate 252 to eject the forging flash and remove it through the robot, after which the two unloading cylinders 251 return to their initial positions;

[0095] S7: Repeat steps S2 to S6 to complete the processing of this type of forgings. If other types of forgings need to be processed, repeat steps S1 to S6.

[0096] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0097] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0098] In this patent, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art will readily understand that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A composite die for trimming and punching of aluminum alloy steering knuckle to prevent deformation, characterized in that: include: A mold frame (1) and a mold (2), wherein: The mold frame (1) is detachably arranged between the anvil and the punching machine, and is used to stably support the mold (2) and transmit the vertical load of the punching machine and the vertical ejection force of the anvil; The mold (2) is detachably arranged inside the mold frame (1), and comprises: an upper mold assembly (21), a lower mold assembly (22), a punch assembly (23) and an anti-deformation assembly (24); the upper mold assembly (21) is detachably connected to the upper mold base (12); the lower mold assembly (22) is detachably connected to the lower mold base (11); the punch assembly (23) is connected to the upper mold assembly (21); and the anti-deformation assembly (24) is slidably connected to the upper mold assembly (21); By integrating the upper die assembly (21), the punch assembly (22) and the anti-deformation assembly (24) in a pair of the dies (2), the trimming and punching operations of the forgings can be completed in one stroke of the punching machine and deformation of the forgings can be avoided.

2. The composite mold according to claim 1, characterized in that: The mold frame (1) comprises: a lower mold base (11), an upper mold base (12), a first guide member (13), a first cushion block (14), a second cushion block (15), a mold change stop block (16), a mold pressing block (17) and a nitrogen spring (18), wherein: The lower die base (11) and the upper die base (12) are connected via a plurality of the first guide members (13); The first cushion block (14) and the second cushion block (15) are arranged in parallel at the upper end of the lower die base (11); The lower die base (11) and the first cushion block (14) are provided with corresponding through holes and are adapted to the top rod of the anvil at the bottom end of the lower die base (11); The two mold-changing stop blocks (16) are respectively arranged on the left side of the first cushion block (14) and on the right side of the second cushion block (15), and the upper surface of the mold-changing stop block (16) is higher than the upper surfaces of the first cushion block (14) and the second cushion block (15); The mold pressing block (17) is slidably connected to the upper mold base (12) through a slot at the bottom end of the upper mold base (12); The nitrogen spring (18) is arranged at the bottom end of the upper die seat (12).

3. The composite mold according to claim 2, characterized in that: The upper mold assembly (21) comprises: an upper pad (211), an upper clamping plate (212), an upper mold pad (213) and an upper mold (214), wherein: The upper pad (211) is connected to the upper die seat (12) via the die pressing block (17); The upper pad (211), the upper clamping plate (212), the upper mold pad (213) and the upper mold (214) are connected in sequence by a plurality of screws and tapping pins and are arranged at the bottom end of the upper mold (214).

4. The composite mold according to claim 3, characterized in that: The lower mold assembly (22) comprises: a lower mold pad (221), a lower mold (222), a lower mold ejector rod (223) and a second guide member (224), wherein: The lower mold pad (221) is detachably connected to the first pad (14) and the second pad (15) respectively through a plurality of slots at the lower ends of the front side and the rear side and suitable fastening screws or bolts; The lower mold (222) is arranged on the upper end of the lower mold pad (221); One end of the lower die ejector rod (223) is not higher than the upper surface of the lower die (222), and the other end thereof sequentially passes through the lower die (222), the lower die pad (221), the second pad (15) and the lower die seat (11) to contact the ejection device provided on the anvil; A plurality of the second guide members (224) are arranged between the upper mold pad (213) and the lower mold pad (221).

5. The composite mold according to claim 4, characterized in that: The punch assembly (23) comprises: a first punch (231) and a second punch (232); one end of the first punch (231) and the second punch (232) are in contact with the upper pad (211), and the other end passes through the upper clamping plate (212), the upper die pad (213) and the upper die (214) in sequence.

6. The composite mold according to claim 5, characterized in that: The lower die pad (221) and the lower die (222) are both provided with through holes connected to the first punch (231) and the second punch (232), and the through holes are connected to the waste material extraction port between the first cushion block (14) and the second cushion block (15).

7. The composite mold according to claim 5, characterized in that: The anti-deformation component (24) comprises: an upper pressing plate (241) and an upper die push rod (242), wherein: The upper pressing plate (241) is slidably connected to the upper die pad (213) and the upper die (214) respectively through a plurality of screws, the upper pad (211) and the adapting through holes on the upper clamping plate (212); The upper die push rod (242) passes through the upper pad (211) and the upper clamping plate (212), and its two ends are respectively in contact with the nitrogen spring (18) and the upper pressing plate (241).

8. The composite mold according to any one of claims 4 to 7, characterized in that: The mold (2) further comprises a discharge assembly (25), which is detachably arranged on the upper end of the lower mold base (11), and comprises: a discharge cylinder (251), a discharge plate (252) and a third guide member (253), wherein: The two discharge cylinders (251) are detachably arranged on the upper ends of the lower die base (12) on the left and right sides of the lower die (222), and the two discharge cylinders (251) are connected to both sides of the discharge plate (252) through connecting pieces. The stripping plate (252) is sleeved on the outer side of the lower mold (222); The third guide member (253) is arranged between the stripping plate (252) and the lower mold pad (221).

9. The composite mold according to claim 8, characterized in that: The first guide members (13) are ball guide pins and guide sleeves, and the number of the first guide members (13) is at least two; The second guide members (224) are ball guide pin guide sleeves and the number of the second guide members (224) is at least two; The third guide member (253) is a guide column and the number of the third guide member (253) is at least one.

10. A method for using a composite die for trimming and punching of aluminum alloy steering knuckles to prevent deformation, which is implemented by using the composite die as described in any one of claims 1 to 9, characterized in that: The steps include: S1: According to the type of forging to be processed, an adapted die (2) is assembled into a die frame (1) through an upper die assembly (21) and a lower die assembly (22); S2: placing the forging on the upper end of the lower die (222), and applying a vertical load to the upper die base (12) by the punching machine, so that the upper die base (12) drives the upper die assembly (21) to move downward, and the upper pressing plate (241) first contacts the forging to close the die; S3: the upper die seat (12) continues to move downward, compressing the nitrogen spring (18), and providing back pressure to the upper pressing plate (241) through the nitrogen spring (18), so as to ensure that the forging does not loosen during the operation; S4: the upper die seat (12) continues to move downward, the upper die (214), the first punch (231) and the second punch (232) respectively contact the forging, and then the trimming and punching operation is completed; S5: the upper die seat (12) returns to the initial position, the cut-off forging flash is stuck on the outside of the lower die (222), and the punched skin falls to the waste material taking port between the first cushion block (14) and the second cushion block (15) and is taken by the robot arm. After that, the robot takes away the forging that has completed the trimming and punching operation; S6: The two unloading cylinders (251) rise and drive the unloading plate (252) to eject the forging flash and remove it through the robot, after which the two unloading cylinders (251) return to their initial positions; S7: Repeat steps S2 to S6 to complete the processing of this type of forgings. If other types of forgings need to be processed, repeat steps S1 to S6.

Images