A low-pressure casting mold for aluminum alloy automobile chassis castings

Abstract

The present invention relates to the field of automobile mold technology, and discloses a low-pressure casting mold for aluminum alloy automobile chassis castings, comprising an upper die; a rotary die; a die sleeve; a switching module for automatically switching the rotary die; an auxiliary module for automatically switching the chassis parts die-cast on the rotary die; the upper die is pressed down by a hydraulic component, driving the switching module to automatically rotate and switch the rotary die. The low-pressure casting mold for aluminum alloy automobile chassis castings can use a single pressure to drive multiple molds to move through the rotary die, thereby realizing rotary alternating die casting. The entire die casting process, secondary corner cutting or secondary molding, automatic discharge, and final automatic lubrication and cooling are all uniformly realized on one rotary die, which not only solves the multi-process problem of chassis molding in traditional processes, but also reduces the labor intensity of operators during the processing of the aluminum alloy chassis. The degree of automation is high, and the die casting efficiency of the aluminum alloy chassis is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile molds, in particular to a low-pressure casting mold for an aluminum alloy automobile chassis casting. Background Art

[0002] The automobile chassis consists of four parts: the transmission system, the running system, the steering system and the braking system. The function of the chassis is to support and install the automobile engine and its various components and assemblies to form the overall shape of the car, and to receive the power of the engine to make the car move and ensure normal driving.

[0003] At present, during the die-casting process of automobile chassis, it may need multiple die-castings, and multiple die-castings require multiple sets of molds to be operated in multiple processes. In addition, during the die-casting, there are still pressed edges on the corners, which require operators to manually knock them out or grind them away, wasting working hours and reducing the die-casting efficiency of the product. At the same time, during the die-casting, a certain degree of mold jamming will occur. The traditional method is to rely on the operator to apply lubricating fluid to the mold from time to time to ensure smooth demolding. However, manual operation will increase the labor intensity of the operator, and at the same time, the mold cannot be effectively cared for in a timely manner, resulting in the risk of mold jamming when the product is demolded. Therefore, a low-pressure casting mold for aluminum alloy automobile chassis castings is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a low-pressure casting mold for aluminum alloy automobile chassis castings, which solves the problems in the existing technology of multiple-step aluminum alloy chassis processing, which requires multiple material transfers to multiple molds and multiple processing, resulting in low processing efficiency, and the traditional mold requires the operator to apply lubricating oil when demolding, resulting in increased labor intensity and unstable demolding.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a low-pressure casting mold for an aluminum alloy automobile chassis casting, comprising an upper pressure mold; a rotary mold; a mold sleeve; a switching module for automatically switching the rotary mold; and an auxiliary module for die-casting the chassis parts on the rotary mold; the upper pressure mold is pressed down by a hydraulic component, driving the switching module to automatically rotate and switch the rotary mold.

[0006] Preferably, the rotary mold is provided with a lower mold 1, a lower mold 2 and a lower mold 3, and the lower mold 1, the lower mold 2 and the lower mold 3 are distributed in a circular array with the center of the rotary mold.

[0007] Preferably, the mold sleeve is connected to a pressure mold 1 and a mold box, the pressure mold 1 corresponds to the lower mold 2, and the mold box corresponds to the lower mold 3.

[0008] Preferably, a material drop port is provided below the mold sleeve, a sponge sheet is provided in the mold box, two oil pots are connected to the mold box, and a material receiving box is provided below the mold sleeve.

[0009] Preferably, the switching module includes a side mold frame, the side mold frame is connected to a connecting plate, the connecting plate is connected to a power column through a driving device, the power column is connected to the rotating mold, the power column is rotatably connected to a connecting frame, and the connecting frame is connected to the mold sleeve.

[0010] Preferably, the driving device includes a support, the support is connected to a guide rod, one end of the guide rod is slidably connected to the connecting frame, the support is connected to a sliding shaft rod, the sliding shaft rod is slidably connected in a sliding groove opened in the connecting plate, the support is rotatably connected to a rotating rod, the bottom of the rotating rod is slidably connected in a spiral groove opened in the power column through a sliding pin, one side of the support is connected to a first spring, and the other end of the first spring is connected to one side of the rotating rod.

[0011] Preferably, a guide groove is provided on the side mold frame, and a pressure rod is slidably connected to the inside of the guide groove, and the pressure rod is connected to the side surface of the first pressure mold.

[0012] Preferably, the auxiliary module includes a rotating wheel, which is connected to the power column, a pressure plate is abutted below the rotating wheel, a rack is connected to the bottom of the pressure plate, a gear is engaged on the rack, both ends of the gear are connected to a rocker arm through an axle rod, and a striker rod is connected to the bottom of the rocker arm.

[0013] Preferably, the rocker arm is connected to a compression spring, one end of the compression spring is connected to a connection box, and the connection box is fixed on the connection frame.

[0014] Preferably, a driving wheel is connected to the power column, and the driving wheel is connected to two transmission wheels through a toothed belt, and the transmission wheel is connected to the mold sleeve through a wheel frame.

[0015] Compared with the prior art, the present invention provides a low-pressure casting mold for aluminum alloy automobile chassis castings, which has the following beneficial effects:

[0016] 1. The low-pressure casting mold for aluminum alloy automobile chassis castings can use a single pressure to drive multiple molds to move through the provided rotary mold, thereby realizing rotary alternating die-casting. The entire die-casting process, including forming, secondary corner cutting or secondary molding, automatic discharge, and final automatic lubrication and cooling, is uniformly implemented on a single rotary mold. This not only solves the multi-process problem in chassis molding in traditional processes, but also reduces the labor intensity of operators during the processing of the aluminum alloy chassis. The overall degree of automation is high, thereby improving the die-casting efficiency of the aluminum alloy chassis.

[0017] 2. The low-pressure casting mold for the aluminum alloy automobile chassis casting can provide a certain elastic impact on the rotating mold through the auxiliary module, making the formed aluminum alloy chassis looser so that the rotating mold can automatically fall off when rotating, without the operator having to manually peel or remove it, thereby improving the smoothness of the product's demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a low-pressure casting mold for an aluminum alloy automobile chassis casting proposed by the present invention;

[0019] Figure 2 This is a schematic structural diagram of a rotary die in a low-pressure casting die for an aluminum alloy automobile chassis casting proposed by the present invention;

[0020] Figure 3 This is a schematic diagram of the connection structure of the die sleeve in a low-pressure casting die for an aluminum alloy automobile chassis casting proposed by the present invention;

[0021] Figure 4 This is a structural schematic diagram of a switching module in a low-pressure casting mold for an aluminum alloy automobile chassis casting proposed by the present invention;

[0022] Figure 5 This is a schematic structural diagram of a driving device in a low-pressure casting mold for an aluminum alloy automobile chassis casting proposed by the present invention;

[0023] Figure 6 This is a structural schematic diagram of an auxiliary module in a low-pressure casting mold for an aluminum alloy automobile chassis casting proposed by the present invention;

[0024] Figure 7 This is a schematic diagram of the connection structure of the drive wheel in a low-pressure casting mold of an aluminum alloy automobile chassis casting proposed by the present invention.

[0025] In the figure: 1. upper pressing die; 2. rotating die; 21. lower die 1; 22. lower die 2; 23. lower die 3; 3. die sleeve; 31. pressing die 1; 32. die box; 33. oil pot; 34. sponge sheet; 35. drop opening; 4. switching module; 41. power column; 42. side die frame; 43. connecting plate; 44. sliding groove; 45. connecting frame; 46. driving device; 461. support; 462. sliding shaft rod; 463. guide rod; 464. rotating rod; 465. first spring; 47. spiral groove; 48. pressure rod; 49. guide groove; 5. auxiliary module; 51. rotating wheel; 52. rack; 53. pressure plate; 54. gear; 55. rocker arm; 56. striker rod; 57. extrusion spring; 58. connecting box; 6. receiving box; 7. driving wheel; 8. transmission wheel; 9. wheel frame. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1 、 Figure 2 and Figure 3 A low-pressure casting mold for an aluminum alloy automobile chassis casting includes an upper die 1; a rotary die 2; the upper die 1 is arranged above the rotary die 2. The upper die 1 is connected to a hydraulic cylinder, which uses the hydraulic cylinder to press the upper die 1. The rotary die 2 is provided with a lower die 1 21, a lower die 22, and a lower die 3 23. The lower die 1 21, the lower die 22, and the lower die 3 23 are arranged in a circular array with the center of the rotary die 2. The three lower dies are arranged to achieve three pressings in a single stroke, and each lower die will correspond to a different processing step. The die sleeve 3 is connected to a die 1 31 and a mold box 32. The die 1 31 corresponds to the lower die 2 22, and the mold box 32 corresponds to the lower die 3 23. In this embodiment, the cooperation between the die 1 31 and the lower die 2 22 is used to achieve secondary molding or corner trimming, and the cooperation of the mold box 32 is used to automatically lubricate and cool the mold cavity.

[0028] In this embodiment, the switching module 4 is used to automatically switch the rotating module 2;

[0029] See also Figure 1 、 Figure 3 and Figure 4 The switching module 4 includes a side mold frame 42, and a connecting plate 43 is connected to the side mold frame 42. The connecting plate 43 is connected to the power column 41 through a driving device 46. The power column 41 is connected to the rotary mold 2. The power column 41 is rotatably connected to the connecting frame 45. The connecting frame 45 is connected to the mold sleeve 3. The downward movement of the side mold frame 42 will drive the intermittent rotation of the power column 41, and then the rotation of the rotary mold 2 is driven by the power column 41, so that it can rotate to the corresponding position of the die 1 31 and the mold box 32. During the overall movement process, the power column 41 will not move when pressing down, and will only drive the power column 41 to rotate when it moves up and resets. Because the mold needs to be stably fixed during the pressing process, the entire rotary mold 2 will not move when the upper die 1 is pressed down. Later, when the upper die 1 rises, it means that the pressing is completed, and the rotary mold 2 will be rotated and shifted.

[0030] For further information, see Figure 3 、 Figure 4 and Figure 5The driving device 46 includes a support 461, a guide rod 463 is connected to the support 461, one end of the guide rod 463 is slidably connected to the connecting frame 45, and a sliding shaft rod 462 is connected to the support 461. The sliding shaft rod 462 is slidably connected to the sliding groove 44 opened on the connecting plate 43, and a rotating rod 464 is rotatably connected to the support 461. The bottom of the rotating rod 464 is slidably connected to the spiral groove 47 opened on the power column 41 through a sliding pin. When the side mold frame 42 moves up, the connecting plate 43 will follow and move up. Then, when moving up, the sliding shaft rod 462 will slide in the sliding groove 44. After the inclined design of the sliding groove 44, the sliding shaft rod 46 will be driven at this time. 2 moves forward and backward, thereby driving the rotating rod 464 to move forward and backward. One end of the rotating rod 464 slides on the power column 41 through a sliding pin, so it slides in the spiral groove 47 on the surface of the power column 41, thereby driving the rotation of the power column 41, and then it will synchronously drive the rotating mold 2 to rotate 120°, and rotate the initially formed aluminum alloy chassis to the position of the die 1 31. As the hydraulic parts continue to press, the side mold frame 42 will be driven to move downward, and then the two pressing rods 48 will be driven to slide obliquely in the guide groove 49, so that the die 1 31 and the mold box 32 are correspondingly extruded and pressed, and the die 1 31 is extruded on the initially formed aluminum alloy chassis. One side of the support 461 is connected to a first spring 465, and the other end of the first spring 465 is connected to one side of the rotating rod 464. The first spring 465 is set to provide a certain elastic force to the rotating rod 464, so that when it reaches the top of the spiral groove 47, it will produce a small rotation, so that the sliding pin can smoothly enter the position of the inclined spiral groove 47, thereby avoiding the situation where the sliding pin slides at the same position and cannot enter the inclined groove, resulting in failure of the power column 41 to rotate.

[0031] For further information, see Figure 3 and Figure 4 The side mold frame 42 is provided with a guide groove 49, and a pressure rod 48 is slidably connected inside the guide groove 49. The pressure rod 48 is connected to the side of the die 1 31. Because the overall side mold frame 42 moves downward, it will drive the two pressure rods 48 to drive the die 1 31 and the mold box 32 to slide on the mold sleeve 3 through the guide groove 49 to form an extrusion state. The die 1 31 is extruded on the initially formed aluminum alloy chassis, which can be a pressing and trimming process or a punching secondary forming process, which is appropriately processed according to the actual chassis forming process. The extrusion of the mold box 32 is to squeeze the sponge sheet 34 inside it onto the corresponding mold. Because the sponge sheet 34 absorbs the lubricating oil inside the oil pot 33, the extrusion at this time will automatically apply a certain amount of lubricating oil into the inner cavity of the mold, thereby lubricating the mold cavity and cooling it at the same time.

[0032] In addition, the auxiliary die set 5 is used to die-cast the chassis parts on the rotary die 2;

[0033] See also Figure 1 and Figure 6 The auxiliary module 5 includes a rotating wheel 51, which is connected to the power column 41. A pressure plate 53 is abutted below the rotating wheel 51. A rack 52 is connected to the bottom of the pressure plate 53. A gear 54 is meshed on the rack 52. The two ends of the gear 54 are connected to a rocker 55 through a shaft. The bottom of the rocker 55 is connected to a striker 56. When the power column 41 rotates, it will drive the rotating wheel 51 to rotate. The rotation of the rotating wheel 51 will press and contact the pressure plate 53, thereby driving the pressure plate 53 downward. The engagement of the gear 54 will drive the rocker 55 to rotate. After rotating a certain angle, when the convex plate position of the rotating wheel 51 is separated from the pressure plate 53, the rocker 55 is affected by gravity and will instantly drive the striker 56 to hit the rotating mold 2, transmitting the vibration force to multiple molds, thereby making the product in the mold cavity looser and then more smoothly ejected from the mold and automatically falling out.

[0034] In addition, see Figure 6 The rocker arm 55 is connected to an extrusion spring 57, one end of which is connected to a connecting box 58, which is fixed to the connecting frame 45. The purpose of providing an extrusion spring 57 on the striker 56 is to ensure that the striker 56 has a stronger impact force when it rotates or is released instantly, thereby ensuring that the internal chassis can be looser.

[0035] It is worth noting that see Figure 6 and Figure 7 The power column 41 is connected to a driving wheel 7, which is connected to two transmission wheels 8 through a toothed belt. The transmission wheel 8 is connected to the mold sleeve 3 through a wheel frame 9. When the power column 41 rotates, the driving wheel 7 will be driven to rotate. Through the transmission of the belt, the two transmission wheels 8 will be driven to rotate, so the operator can place the blank on the belt and load it. Because manual discharge may result in a small space between the upper and lower molds, manual discharge is inconvenient, and safety accidents may occur, so the external conveying feeding method is used to make it smoother and more stable. At the same time, a whole plate is placed on the belt. With the first die-casting, the outer frame will remain, and it will move out of the working range with the movement of the conveyor belt.

[0036] Working principle: first, when the overall mold is being processed, the aluminum alloy blank will be in the position of the lower mold 21, and then the hydraulic component drives the upper mold 1 to press down, so that it acts on the position of the lower mold 21, and the upper mold 1 and the lower mold 21 are closed, so that the aluminum alloy blank is die-casted and initially formed. Then, when the hydraulic component drives the upper mold 1 to move up and reset, at this time, it will synchronously drive the side mold frame 42 to move up, and the connecting plate 43 will follow and move up. Then, when moving up, the sliding shaft rod 462 will slide in the sliding groove 44. Through the inclined design of the sliding groove 44, the support 461 on the sliding shaft rod 462 will be driven to move back and forth, and then the rotating rod 464 will be driven to move back and forth. One end of the rotating rod 464 slides on the power column 41 through the sliding pin, so it will slide in the spiral groove 47 on the surface of the power column 41, and then through the spiral design, it drives the rotation of the power column 41 during the rise. When the overall side mold frame 42 is pressed down, the rotating rod 464 slides on the spiral groove 47 through the shaft pin. When the rotary groove 47 is in the horizontal groove and reaches the top position of the spiral groove 47, the side mold frame 42 will drive the rotating rod 464 to pull back, so that the sliding pin slides in the inclined groove of the spiral groove 47. Therefore, during the overall movement process, the power column 41 will not move when pressing down, and will only drive the power column 41 to rotate when it moves up and resets. The guide rod 463 provided will directly limit the movement of the support 461 in the front and rear directions. After that, the rotation of the power column 41 will drive the rotating mold 2 to rotate 120°, and rotate the initially formed aluminum alloy chassis to the position of the die 1 31. As the hydraulic parts continue to press down, the side mold frame 42 will be driven to move downward, and then the two pressure rods 48 will be driven to slide obliquely in the guide groove 49, so that the die 1 31 and the mold box 32 are correspondingly extruded and pressed. The die 1 31 is extruded on the initially formed aluminum alloy chassis, which can be subjected to pressing and slicing processing or punching secondary forming processing, and is appropriately processed according to the actual chassis forming process. The extrusion of the mold box 32 presses the sponge sheet 34 inside it onto the corresponding mold. Because the sponge sheet 34 absorbs the lubricating oil in the oil pot 33, the extrusion will automatically apply a certain amount of lubricating oil to the inner cavity of the mold, thereby lubricating the mold cavity and cooling it. After that, with each repeated pressure, the rotating mold 2 will be driven to move intermittently. When it rotates 180 degrees, the aluminum alloy chassis will be affected by gravity and will fall from the drop port 35 into the inside of the receiving box 6 for collection.In order to prevent the chassis from getting stuck, the auxiliary module 5 is set up. When the power column 41 rotates each time, it will drive the rotation of the rotating wheel 51. The rotation of the rotating wheel 51 will squeeze and contact the pressure plate 53, thereby driving the pressure plate 53 downward, which will drive the rack 52 downward. The rack 52 is slidably connected to the connecting frame 45, so through the engagement of the gear 54, it will drive the rocker 55 to rotate. After rotating a certain angle, the convex plate position of the rotating wheel 51 is separated from the pressure plate 53. The rocker 55 is affected by gravity and will instantly drive the striker 56 to hit the rotating mold 2, transmitting the vibration force to multiple molds, thereby making the product in the mold cavity looser and then more smoothly ejected from the mold and automatically falling. The purpose of providing the extrusion spring 57 on the striker 56 is to provide a strong impact force when the striker 56 rotates or when it is instantly released, thereby ensuring that the internal chassis can be loosened. Therefore, the overall automatic switching of molds is realized, and the effect of multi-mold synchronous operation during single-step operation is achieved, thereby improving the forming efficiency of the aluminum alloy chassis during die-casting.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. A low-pressure casting mold for aluminum alloy automobile chassis castings, characterized in that: include: Upper die (1); Rotary mold (2); Die sleeve (3); A switching module (4) for automatically switching the rotary module (2); An auxiliary die set (5) is used for die-casting the chassis parts on the rotary die (2); The upper pressing die (1) is pressed downward by the hydraulic component, driving the switching die (4) to automatically rotate and switch the rotating die (2); The rotary mold (2) is provided with a lower mold 1 (21), a lower mold 2 (22) and a lower mold 3 (23), wherein the lower mold 1 (21), the lower mold 2 (22) and the lower mold 3 (23) are distributed in a circular array with the center of the rotary mold (2); The mold sleeve (3) is connected to a die (31) and a mold box (32), the die (31) and the lower mold (22) correspond to each other, and the mold box (32) and the lower mold (23) correspond to each other; The switching module (4) includes a side mold frame (42), a connecting plate (43) is connected to the side mold frame (42), the connecting plate (43) is connected to a power column (41) via a driving device (46), the power column (41) is connected to the rotary mold (2), a connecting frame (45) is rotatably connected to the power column (41), and the connecting frame (45) is connected to the mold sleeve (3); The driving device (46) includes a support (461), a guide rod (463) is connected to the support (461), one end of the guide rod (463) is slidably connected to the connecting frame (45), a sliding shaft rod (462) is connected to the support (461), the sliding shaft rod (462) is slidably connected to the sliding groove (44) provided on the connecting plate (43), a rotating rod (464) is rotatably connected to the support (461), the bottom of the rotating rod (464) is slidably connected to the spiral groove (47) provided on the power column (41) through a sliding pin, a first spring (465) is connected to one side of the support (461), and the other end of the first spring (465) is connected to one side of the rotating rod (464); The side mold frame (42) is provided with a guide groove (49), the interior of the guide groove (49) is slidably connected to a pressure rod (48), and the pressure rod (48) is connected to the side of the first pressure mold (31); The auxiliary module (5) includes a rotating wheel (51), the rotating wheel (51) is connected to the power column (41), a pressure plate (53) is abutted below the rotating wheel (51), the bottom of the pressure plate (53) is connected to a rack (52), a gear (54) is meshed on the rack (52), both ends of the gear (54) are connected to a rocker (55) through a shaft, and the bottom of the rocker (55) is connected to a striker (56).

2. The low-pressure casting mold for aluminum alloy automobile chassis casting according to claim 1, characterized in that: A material drop opening (35) is provided below the mold sleeve (3), a sponge sheet (34) is provided in the mold box (32), two oil pots (33) are connected to the mold box (32), and a material receiving box (6) is provided below the mold sleeve (3).

3. The low-pressure casting mold for aluminum alloy automobile chassis casting according to claim 1, characterized in that: The swing rod (55) is connected to a compression spring (57), one end of the compression spring (57) is connected to a connection box (58), and the connection box (58) is fixed on the connection frame (45).

4. The low-pressure casting mold for aluminum alloy automobile chassis casting according to claim 1, characterized in that: The power column (41) is connected to a driving wheel (7), the driving wheel (7) is connected to two transmission wheels (8) through a toothed belt, and the transmission wheels (8) are connected to the mold sleeve (3) through a wheel frame (9).

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