CN117123738A - Casting device for automobile gearbox shell - Google Patents
Casting device for automobile gearbox shell Download PDFInfo
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- CN117123738A CN117123738A CN202311386594.XA CN202311386594A CN117123738A CN 117123738 A CN117123738 A CN 117123738A CN 202311386594 A CN202311386594 A CN 202311386594A CN 117123738 A CN117123738 A CN 117123738A
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- 238000005266 casting Methods 0.000 title claims abstract description 94
- 230000007246 mechanism Effects 0.000 claims abstract description 58
- 208000002925 dental caries Diseases 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 abstract description 11
- 238000005457 optimization Methods 0.000 description 10
- 230000005484 gravity Effects 0.000 description 9
- 238000007789 sealing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/04—Handling or stripping castings or ingots
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Devices For Molds (AREA)
Abstract
The application provides a casting device for an automobile gearbox shell, which relates to the field of casting of automobile shells and comprises a portal support (10), a positioning plate (20), an upper die (30) and a lower die (40), wherein the positioning plate (20) is rotatably arranged on two side surfaces of the portal support (10), the upper die (30) and the lower die (40) are arranged between the portal support and the portal support, two sides of the upper die (30) are connected with the positioning plate (20) through a shaking mechanism, a male die (31) is arranged at the lower end of the upper die, two sides of the lower die (40) are connected with the positioning plate (20) through a telescopic connecting mechanism (45), grooves (41) are formed in the middle of the lower die, locking mechanisms are uniformly arranged on boss outer rings of the lower die (40), and the locking mechanisms are connected with the upper die (30) through connecting sliding rods (50). The casting device can realize that casting liquid can quickly, uniformly and fully fill the inner cavity of the die in the casting process, so that the quality of a cast shell is ensured; simultaneously, this casting device can be convenient for drawing of patterns and take.
Description
Technical Field
The application relates to the technical field of casting of automobile shells, in particular to a casting device for an automobile gearbox shell.
Background
The speed changing box shell, namely the structure for installing a speed changing transmission mechanism and accessories thereof, mainly adopts different gear combinations and a hydraulic system to generate speed changing and distance changing, thereby realizing the change of rotating speed. At present, the gearbox housing is mainly obtained by casting, i.e. a closed multi-sided structure with a certain shape is adopted as a mould of the preformed piece, and a casting material (usually an aluminum alloy) heated into liquid is introduced into the mould, and after the liquid casting material is cooled, a formed housing blank or part is obtained.
However, the existing gearbox housing (especially in the commercial vehicle field, such as trucks, buses, tractors and the like) is relatively complex in overall structure due to the limitation of the whole vehicle space and the diversity of functional requirements, and the shape of the corresponding casting mold cavity is irregular, so that casting liquid cannot uniformly and stably permeate into each position of the casting mold cavity in the casting process, bubble holes or cracks are generated after casting the housing, the thickness of the housing does not meet the product requirements, the casting uniformity or consistency is poor, the whole casting of the housing cannot be completed, and the like, thereby increasing the casting reject ratio, reducing the casting efficiency and improving the casting cost. Meanwhile, after casting and cooling forming, the existing shell is easy to closely attach with a die, so that the problem that the shell blank or the part is inconvenient to take is solved, the casting efficiency of the shell is greatly affected, the casting beat is dragged slowly, the cast blank or the part is easily damaged by forced demolding, and the reject ratio of the part is increased.
Disclosure of Invention
Aiming at the problems existing in the prior art, the application aims to provide a casting device for an automobile gearbox shell, and the casting device realizes the integral shaking of a mould by micro-shaking and translation of the mould in the casting process, so as to ensure that casting liquid can quickly and uniformly flow to an irregular inner cavity of the casting mould and ensure the integral quality and uniformity of the casting shell; simultaneously, this casting device is after accomplishing the casting, through the drawing of patterns of mould upset realization blank or part, is convenient for take of blank or part after the casting, effectively promotes and takes efficiency, reduces the probability of damaging the part in-process of taking.
The aim of the application is achieved by the following technical scheme:
the casting device for the automobile gearbox shell comprises a door-shaped support, two positioning plates, an upper die and a lower die, wherein the two positioning plates are respectively arranged on opposite side surfaces of two sides of the door-shaped support in a rotating manner, and the two positioning plates are arranged in parallel; an upper die and a lower die are sequentially arranged between the two positioning plates from top to bottom, two sides of the upper die are respectively connected with the corresponding positioning plates through a shaking mechanism, a male die is arranged in the middle of the lower end of the upper die, the cross section of the lower die is of a convex structure, two sides of the lower die are respectively connected with the corresponding positioning plates through telescopic connecting mechanisms, the middle of a boss (namely, a protruding part of the convex structure) of the lower die is provided with a groove corresponding to the male die, and a boss outer ring (around the central axis of the lower die) is uniformly provided with a locking mechanism, and the locking mechanism is connected with the upper die through a connecting slide rod.
Based on the further optimization of above-mentioned scheme, the locating plate rotates the axis collineation that sets up in the both sides and two pivots of portal frame through the pivot respectively.
Based on further optimization of the scheme, a first sliding cavity is formed in the upper die, and an iron core block is arranged in the first sliding cavity in a sliding mode; the upper die of the outer ring of the first sliding cavity is internally provided with a horizontal chute corresponding to the locking mechanism respectively and communicated with the first sliding cavity; the connecting rod is arranged on the outer wall of the iron core block and corresponds to the horizontal chute and is in sliding connection with the horizontal chute; the connecting slide bar is set gradually from top to bottom to thick pole section, thin pole section and thick pole section down, go up thick pole section diameter and thick pole section diameter unanimous just is greater than thin pole section down, go up the mould and correspond to connect the slide bar and offer vertical hole and corresponding horizontal spout intercommunication, the one end that the locking mechanism was kept away from to the connecting slide bar runs through corresponding vertical hole and connect the thin pole section of slide bar and run through corresponding connecting rod, the sliding hole is offered to thin pole section that the connecting rod corresponds to connect the slide bar and the sliding hole diameter is less than thick pole section (or thick pole section down) diameter.
Based on the further optimization of the scheme, the shaking mechanism comprises a sliding seat, a telescopic assembly, a first gear rod, an incomplete gear, a first bevel gear, a second gear rod, a second bevel gear, a driven gear and a toothed ring; the side surface of one side of the sliding seat far away from the upper die is in sliding connection with the corresponding positioning plate, and a tooth cavity is arranged in the sliding seat; the telescopic component is rotatably arranged in the tooth cavity and is connected with the corresponding side wall of the upper die; the tooth cavity is positioned at the lower side of the telescopic component and is rotationally provided with a first gear rod, and the outer wall of the first gear rod is sequentially sleeved with an incomplete gear and a first bevel gear; the bottom of the sliding seat is rotatably provided with a second gear rod which penetrates through the bottom surface of the sliding seat, the second gear rod is positioned on the outer wall of the tooth cavity and fixedly sleeved with a second bevel gear, and the second bevel gear is meshed with the first bevel gear; the outer wall of the telescopic component positioned in the tooth cavity is fixedly sleeved with a driven gear which can be meshed with the incomplete gear; the outer ring of the driven gear and the outer ring of the incomplete gear are provided with a toothed ring, the outer wall of the toothed ring is rotationally connected with the inner wall of the toothed cavity, and the inner ring of the toothed ring is meshed with the driven gear and can be meshed with the incomplete gear.
Based on the further optimization of above-mentioned scheme, the telescopic assembly includes first sliding sleeve, first slide bar and first spring, and first sliding sleeve one end is connected with the tooth chamber lateral wall rotation, the other end runs through corresponding sliding seat lateral wall and rotates to be connected, and first slide bar coaxial setting is close to the one end of last mould and with first sliding sleeve sliding connection at first sliding sleeve, and first slide bar is close to the one end of last mould and goes up mould lateral wall fixed connection, the other end and first sliding sleeve inner wall through first spring coupling.
Based on the further optimization of the scheme, the outer wall of the second gear rod, which is positioned outside the sliding seat, is fixedly sleeved with the cam, and the cams on the two sides of the upper die face opposite directions.
Based on the further optimization of above-mentioned scheme, door shape support top sets up hydraulic lifting mechanism and hydraulic lifting mechanism lower extreme sets up the electro-magnet for upper and lower lift of upper mould is gone up in the control.
Based on the further optimization of above-mentioned scheme, go up the mould in and lie in first smooth chamber outer lane setting and offer the feeding through-hole that runs through the mould, feeding through-hole and horizontal spout ectopic setting for the import of casting liquid.
Based on further optimization of the scheme, the telescopic connecting mechanism comprises a second sliding sleeve, a second sliding rod and a second spring, wherein the positioning plate corresponds to the second sliding sleeve and is provided with an arc-shaped chute by taking the axis of the first sliding rod as the center of a circle, and one end of the second sliding sleeve, which is far away from the lower die, is clamped in the corresponding arc-shaped chute and is in sliding connection; one end of the second sliding sleeve, which is close to the lower die, is coaxially provided with a second sliding rod which is in sliding connection with the second sliding sleeve, one end of the second sliding rod, which is far away from the lower die, is connected with the inner wall of the second sliding sleeve through a second spring, and the other end of the second sliding rod is fixedly connected with the corresponding side wall of the lower die.
Based on further optimization of the scheme, the locking mechanism comprises a positioning block and a light spring, wherein the positioning block is arranged on the end face around the boss of the lower die in a sliding manner, a positioning groove is formed in the side wall of the boss of the lower die corresponding to the positioning block, and the side face of one side, close to the boss of the lower die, of the positioning block is connected with the inside of the positioning groove through the light spring; the upper end face of the positioning block is provided with an inclined chute which is inclined from the middle part of the lower die to the periphery, and the bottom of the connecting slide bar is clamped in the corresponding inclined chute and is in sliding connection.
For the convenience of demolding and taking of the molded shell blank or part, based on the further optimization of the scheme, a second sliding cavity is formed in the lower die, a gravity block is arranged in the second sliding cavity in a sliding mode, a plurality of L-shaped ejector rods are uniformly arranged on the side wall of the gravity block around the axis of the gravity block, an L-shaped chute is formed in the lower die corresponding to the L-shaped ejector rods, the L-shaped ejector rods can slide in the L-shaped chute, and the width of the transverse groove of the L-shaped chute is larger than the diameter of the transverse rod of the L-shaped ejector rods.
The following technical effects are achieved:
the application is characterized in that by setting the dithering mechanism, the dithering mechanism comprises the following components: the sliding seat, the flexible subassembly, first gear lever, incomplete gear, first bevel gear, the second gear lever, the second bevel gear, driven gear, ring gear and cam, telescopic connection's cooperation, utilize the small-angle rotation of last mould and left and right translation drive the bed die swing by a small margin and left and right translation, realize upper and lower mould's compound shake promptly, make the casting liquid abundant, flow fast, and then even, the effectual casting die cavity that forms of filling mould and bed die, avoid casting liquid not to pack the condition of casting die cavity, partial casting liquid just condensation shaping, and then lead to the casting insufficient, the casing thickness does not satisfy the demand, easily appear gas pocket or crackle scheduling problem. In addition, the application realizes the tight combination of the upper die and the lower die in the casting process (namely self-locking in the casting process) through the matching of the inner structures of the upper die and the lower die, the connecting slide bar, the locking mechanism and the like, and avoids the splashing of casting solution caused by the shaking of the shaking mechanism in the casting process, thereby influencing the external casting environment and even causing safety accidents; meanwhile, the structural stability of the casting cavity in the casting process is ensured through the close fit of the upper die and the lower die, and the deviation of the casting cavity caused by the shaking process and the influence on the final forming quality are avoided.
According to the application, the upper die and the lower die are reversely turned through the cooperation of the positioning plate, the upper die, the lower die, the dithering mechanism, the locking mechanism and the connecting slide rod, so that the upper die and the lower die are automatically separated by turning, the demoulding of a blank or a part after casting is finished is facilitated, the blank or the part is conveniently taken, and the problems of damage to the blank or the part, influence on casting efficiency, increase of casting cost and the like caused by forced demoulding are avoided.
The application has simple integral structure, convenient casting and high processing efficiency, can be effectively used for casting the gearbox shells of various automobiles (especially commercial vehicles such as trucks, buses, tractors and the like), and has high casting quality and low reject ratio.
Drawings
FIG. 1 is a schematic view showing the overall structure of a casting apparatus according to an embodiment of the present application.
Fig. 2 is a partial enlarged view of a in fig. 1.
Fig. 3 is an E-E cross-sectional view of fig. 2.
Fig. 4 is a partial enlarged view of B in fig. 1.
Fig. 5 is a cross-sectional view taken along the direction C-C of fig. 1.
Fig. 6 is a D-D cross-sectional view of fig. 1.
FIG. 7 is a side elevational view of one side of a positioning plate of a casting apparatus in accordance with an embodiment of the present application.
Fig. 8 is an initial state diagram of a casting apparatus in an embodiment of the present application.
Wherein, 10, a door-shaped bracket; 11. a hydraulic lifting mechanism; 12. an electromagnet; 20. a positioning plate; 21. a rotating shaft; 22. a vertical chute; 23. an arc chute; 30. an upper die; 31. a male die; 32. a first sliding cavity; 320. a core block; 33. a horizontal chute; 330. a connecting rod; 34. a vertical hole; 35. a feed through; 40. a lower die; 41. a groove; 42. a second sliding cavity; 420. a gravity block; 43. an L-shaped chute; 430. an L-shaped ejector rod; 44. a positioning groove; 45. a telescopic connection mechanism; 50. connecting a slide bar; 600. a cam; 61. a sliding seat; 610. tooth cavity; 62. a telescoping assembly; 63. a first gear lever; 64. an incomplete gear; 65. a first bevel gear; 66. a second gear lever; 67. a second bevel gear; 68. a driven gear; 69. a toothed ring; 71. a positioning block; 710. tilting the chute; 72. a light spring.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.
Example 1
Reference is made to the following figures: the casting device for the automobile gearbox shell comprises a door-shaped bracket 10, a positioning plate 20, an upper die 30 and a lower die 40, as shown in fig. 1: the two positioning plates 20 are respectively arranged on opposite side surfaces on two sides of the portal frame 10 in a rotating way through a rotating shaft 21 (see fig. 1, the left side surface of the left positioning plate 20 is rotationally connected with the left support plate of the portal frame 10 through the rotating shaft 21, the right side surface of the right positioning plate 20 is rotationally connected with the right support plate of the portal frame 10 through the rotating shaft 21), the two positioning plates 20 are arranged in parallel, the two rotating shafts 21 are coaxially arranged (namely, the central axes of the two rotating shafts 21 are collinear), and the rotating shafts 21 can be controlled to rotate through a motor arranged on the side support plate of the portal frame 10).
An upper die 30 and a lower die 40 are sequentially arranged between two positioning plates 20 from top to bottom, two sides of the upper die 30 are respectively connected with the corresponding positioning plates 20 through a shaking mechanism, a male die 31 is arranged in the middle of the lower end of the upper die 30, the cross section of the lower die 40 is of a convex structure, two sides of the lower die 40 are respectively connected with the corresponding positioning plates 20 through telescopic connecting mechanisms 45, a boss (namely, a convex part of the convex structure is shown by referring to fig. 1) of the lower die 40 is provided with a groove 41 corresponding to the male die 31 in the middle, locking mechanisms are uniformly arranged on an outer ring (around the central axis of the lower die 40) of the boss, the number of the locking mechanisms in the embodiment is six, and the locking mechanisms are connected with the upper die 30 through connecting sliding rods 50 (because the locking mechanisms are six groups, and the corresponding connecting sliding rods 50 in the embodiment are six).
The method comprises the following steps: the upper die 30 is internally provided with a first sliding cavity 32, and an iron core block 320 is arranged in the first sliding cavity 32 in a sliding manner; the corresponding locking mechanisms in the upper mold 30 of the outer ring of the first sliding cavity 32 are respectively provided with a horizontal sliding groove 33, and the horizontal sliding grooves 33 are communicated with the first sliding cavity 32 (as shown in fig. 5, six groups of locking mechanisms are adopted in the embodiment, so that six horizontal sliding grooves 33 are uniformly arranged on the outer ring of the first sliding cavity 32); the outer wall of the iron core block 320 is provided with a connecting rod 330 corresponding to the horizontal chute 33, and the outer wall of the connecting rod 330 is in sliding connection with the inner wall of the horizontal chute 33; the connecting slide bar 50 is sequentially arranged into an upper thick bar section, a thin bar section and a lower thick bar section from top to bottom, the diameter of the upper thick bar section is identical to that of the lower thick bar section and is larger than that of the thin bar section (refer to fig. 1), the upper die 30 is correspondingly provided with a vertical hole 34 corresponding to the connecting slide bar 50 (specifically, the upper thick bar section or the lower thick bar section of the connecting slide bar 50), the vertical hole 34 is communicated with a corresponding horizontal sliding groove 33, one end of the connecting slide bar 50 far away from the locking mechanism penetrates through the corresponding vertical hole 34, the thin bar section of the connecting slide bar 50 penetrates through a corresponding connecting rod 330, the connecting rod 330 is correspondingly provided with a sliding hole corresponding to the thin bar section of the connecting slide bar 50, and the diameter of the sliding hole is smaller than that of the upper thick bar section (or the lower thick bar section) (namely, hard limit is formed by the relative sliding between the connecting slide bar 50 and the connecting rod 330 through the upper thick bar section and the lower thick bar section).
The shaking mechanism comprises a sliding seat 61, a telescopic assembly 62, a first gear rod 63, an incomplete gear 64, a first bevel gear 65, a second gear rod 66, a second bevel gear 67, a driven gear 68 and a toothed ring 69; the side surface of the sliding seat 61 far away from the upper mold 30 is slidably connected with the corresponding positioning plate 20 (for example, as shown in fig. 7, vertical sliding grooves 22 are formed on opposite side surfaces of the two positioning plates 20), a vertical sliding block is arranged on the side surface of the sliding seat 61 far away from the upper mold 30 and corresponds to the vertical sliding grooves 22, the vertical sliding block is clamped in the corresponding vertical sliding grooves 22 and is slidably connected), and a tooth cavity 610 is formed in the sliding seat 61 (refer to fig. 2). The telescopic component 62 is rotatably arranged in the tooth cavity 610, and the telescopic component 62 is connected with the corresponding side wall of the upper die 30, and the telescopic component 62 specifically comprises a first sliding sleeve, a first sliding rod and a first spring, and is shown with reference to fig. 2: one end (i.e. the left end shown in fig. 2) of the first sliding sleeve is rotationally connected with the side wall of the tooth cavity 610, the other end (i.e. the right end shown in fig. 2) penetrates through the side wall of the corresponding sliding seat 61 and is rotationally connected with the side wall of the corresponding sliding seat, the first sliding rod is coaxially arranged at one end (i.e. the right end shown in fig. 2) of the first sliding sleeve, which is close to the upper die 30, and is in sliding connection with the first sliding sleeve, one end (i.e. the right end shown in fig. 2) of the first sliding rod, which is close to the upper die 30, is fixedly connected with the side wall of the upper die 30, and the other end (i.e. the left end shown in fig. 2) of the first sliding rod is connected with the inner wall of the first sliding sleeve through a first spring. The gear cavity 610 is located at the lower side of the telescopic component 62, a first gear rod 63 is rotatably arranged (namely, two ends of the first gear rod 63 are respectively and rotatably connected with the side wall of the gear cavity 610), an incomplete gear 64 and a first bevel gear 65 are sequentially sleeved on the outer wall of the first gear rod 63, and the first gear rod 63 is controlled to rotate by a motor arranged in the sliding seat 61; the bottom of the sliding seat 61 is rotatably provided with a second gear rod 66 (see fig. 2, the second gear rod 66 is perpendicular to the axis of the first gear rod 63), the second gear rod 66 penetrates through the bottom surface of the sliding seat 61, the second gear rod 66 is positioned on the outer wall of the tooth cavity 610 and fixedly sleeved with a second bevel gear 67, and the second bevel gear 67 is meshed with the first bevel gear 65; the telescopic assembly 62 is positioned on the outer wall of the tooth cavity 610 (specifically, the outer wall of the first sliding sleeve) and fixedly sleeved with the driven gear 68, and the driven gear 68 can be meshed with the incomplete gear 64 (see fig. 3); the driven gear 68 and the outer ring of the incomplete gear 64 are provided with a toothed ring 69, and the outer wall of the toothed ring 69 is rotatably connected with the inner wall of the toothed cavity 610 through a ball bearing (specifically, the outer wall of the toothed ring 69 is fixedly sleeved with the ball bearing, and the outer wall of the ball bearing is embedded in the wall of the corresponding toothed cavity 610, as shown in fig. 2 and 3), and the inner ring of the toothed ring 69 is meshed with the driven gear 68 and can be meshed with the incomplete gear 64. The outer wall of the second gear rod 66 located outside the sliding seat 61 is fixedly sleeved with the cam 600, and the cams 600 on both sides of the upper die 30 face opposite directions, as shown in fig. 6: the left cam 600 of the upper die 30 faces upward and the right cam 600 of the upper die 30 faces downward.
The top of the door-shaped bracket 10 is provided with a hydraulic lifting mechanism 11, in the embodiment, the hydraulic lifting mechanism 11 comprises a hydraulic cylinder and a lifting rod, the hydraulic cylinder is fixedly arranged at the top of the door-shaped bracket 10, and the output end of the hydraulic cylinder is provided with the lifting rod; and an electromagnet 12 is arranged at the lower end of the hydraulic lifting mechanism 11 (specifically, the end of the lifting rod far away from the hydraulic lever) and is used for controlling the upper die 30 to lift up and down. A feeding through hole 35 penetrating through the upper die 30 is arranged in the upper die 30 and positioned on the outer ring of the first sliding cavity 32, and the feeding through hole 35 and the horizontal sliding groove 33 are arranged in an out-of-position manner (as shown in fig. 5, namely, the feeding through hole 35 and the horizontal sliding groove 33 do not interfere with each other) for guiding casting liquid; the feeding through holes 35 can be arranged in one or more than one way, and are set according to actual casting requirements, and meanwhile, exhaust holes (the exhaust holes are respectively and differently arranged with the feeding through holes 35 and the horizontal sliding grooves 33) are also required to be arranged on the outer ring of the first sliding cavity 32 of the upper die 30, so that gas in the casting cavity is conveniently discharged, and high pressure is avoided in the casting cavity.
The telescopic connection mechanism 45 comprises a second sliding sleeve, a second sliding rod and a second spring, the positioning plate 20 corresponds to the second sliding sleeve, an arc-shaped sliding groove 23 (shown in fig. 7) is formed by taking the axis of a first sliding rod (here, the first sliding rod after the upper die 30 and the lower die 40 are closed to form a casting cavity) as the center of a circle, and one end (by arranging the arc-shaped sliding block) of the second sliding sleeve, which is far away from the lower die 40, is clamped in the corresponding arc-shaped sliding groove 23 and is in sliding connection; the second sliding sleeve is close to the one end coaxial setting second slide bar of bed die 40 and second slide bar and second sliding sleeve sliding connection, and the one end that the second slide bar kept away from bed die 40 passes through the second spring and is connected with second sliding sleeve inner wall, the other end and bed die 40 correspond lateral wall fixed connection (as shown in fig. 1).
The locking mechanism comprises a positioning block 71 and a light spring 72, the positioning block 71 is arranged on the end face around the boss of the lower die 40 in a sliding manner (namely, the bottom face of the positioning block 71 is in sliding connection with the end face around the boss of the lower die 40), a positioning groove 44 is formed in the side wall of the boss of the lower die 40 corresponding to the positioning block 71, and the side face of one side, close to the boss of the lower die 40, of the positioning block 71 is connected with the inside of the positioning groove 44 through the light spring 72 (shown in reference to fig. 4); the upper end surface of the positioning block 71 is provided with an inclined chute 710 which is inclined from the middle part of the lower die 40 to the periphery, and the bottom of the connecting slide bar 50 (specifically the bottom of the lower thick bar section) is clamped in the corresponding inclined chute 710 and is in sliding connection.
Example 2
As another preferred embodiment of the solution of the present application, in order to facilitate demolding and thus convenient taking of the molded shell blank or part based on the casting device described in embodiment 1, the lower mold 40 is internally provided with a second sliding cavity 42, a gravity block 420 is slidably disposed in the second sliding cavity 42, and a plurality of L-shaped ejector pins 430 are uniformly disposed on the side wall of the gravity block 420 and around the axis thereof, in this embodiment: the number of the L-shaped ejector pins 430 is generally 3-6 (the L-shaped ejector pins can be set by a person skilled in the art according to actual needs); the lower die 40 is internally provided with an L-shaped sliding groove 43 corresponding to the L-shaped ejector rod 430, the L-shaped ejector rod 430 can slide in the L-shaped sliding groove 43, and the width of the transverse groove of the L-shaped sliding groove 43 is larger than the diameter of the transverse rod of the L-shaped ejector rod 430 (refer to FIG. 4); the vertical rod diameter of the L-shaped ejector rod 430 is larger than the transverse rod diameter of the L-shaped ejector rod, and the outer wall of the vertical rod is in sliding connection with the inner wall of the vertical groove of the L-shaped sliding groove 43; the shaped blank or part is ejected out of the recess 41 by sliding the "L" -shaped ejector pins 430.
Example 3
As another preferred embodiment of the scheme of the application, on the basis of the casting device in embodiment 2, a sealing ring is arranged on the boss end face of the lower die 40 and positioned on the outer ring of the L-shaped ejector rod 430, a sealing groove is arranged on the bottom face of the upper die 30 positioned on the outer ring of the male die 31 corresponding to the sealing ring, and the sealing ring is clamped in the sealing groove to realize the sealing of the casting cavity, so that the splashing of casting liquid in the casting process is further avoided.
Example 4
As another preferred embodiment of the solution of the present application, on the basis of any one of the casting devices of embodiments 1 to 3, a retractable feed pipe is provided at the top of the portal frame 10 and corresponding to the feed through hole 35; for example: the inlet pipe adopts the structure setting of bellows, or the inlet pipe adopts telescopic tube formula structure, and the specific structure of inlet pipe, the person skilled in the art can set up according to actual demand, does not make too much discussion in this embodiment.
Example 5
A transmission housing casting method using the casting apparatus described in embodiment 2 or embodiment 3, comprising the steps of:
step one, the initial state of the casting device is shown in fig. 8: namely, the upper die 30 and the lower die 40 are attached and the locking mechanism is self-locking; before casting starts, firstly, starting the hydraulic lifting mechanism 11, enabling the lifting rod and the electromagnet 12 to move downwards until the bottom surface of the electromagnet 12 contacts with the end surface of the upper die 30, and suspending the hydraulic lifting mechanism 11; then the electromagnet 12 is electrified, and the iron core block 320 is attracted upwards by utilizing the magnetism of the electromagnet 12; after the electromagnet 12 is kept electrified, the hydraulic lifting mechanism 11 is started to enable the lifting rod and the electromagnet 12 to move upwards, and then the upper die 30 and the shaking mechanism are driven to move upwards, the upper die 30 is pulled to enable the positioning block 71 to be separated from the positioning groove 44 and contact with the locking between the upper die 30 and the lower die 40 through the upward movement of the connecting sliding rod 50, and the hydraulic lifting mechanism is shown in fig. 1; then, cleaning the male die 31 and the groove 41 to avoid impurities in the casting cavity and influence on casting of the shell;
step two, starting the hydraulic lifting mechanism 11 again to enable the lifting rod and the electromagnet 12 to move downwards, further driving the upper die 30 and the shaking mechanism to move downwards, at the moment, the connecting rod 330 slides on the outer wall of the thin rod section of the connecting slide rod 50, the connecting slide rod 50 does not move until the groove 41 and the male die 31 form a casting cavity, and the bottom surface of the connecting rod 330 is propped up by the lower thick rod section of the connecting slide rod 50; then, the electromagnet 12 is powered off, the electromagnet 12 is controlled to move upwards to the initial position through the hydraulic lifting mechanism 11, the iron core block 320 loses the magnetic force effect and moves downwards due to the gravity effect, and then the connecting rod 330 pushes the connecting slide rod 50 to move downwards, so that the positioning block 71 is clamped in the positioning groove 44, the light spring 72 is compressed, and the locking between the upper die 30 and the lower die 40 is completed.
Step three, the casting solution is fed into the casting cavity through the feeding through hole 35, and simultaneously the first gear rod 63 is started to rotate, and the first gear rod 63 drives the incomplete gear 64 (anticlockwise rotation as shown in fig. 3) and the first bevel gear 65 to rotate: when the tooth segment of the incomplete gear 64 is meshed with the driven gear 68, the smooth segment corresponds to the tooth ring 69, and the incomplete gear 64 drives the driven gear 68 and the telescopic assembly 62 to rotate clockwise as shown in fig. 3; when the tooth segment of the incomplete gear 64 is meshed with the tooth ring 69, the smooth segment corresponds to the driven gear 68, and the tooth ring 69 drives the driven gear 68 and the telescopic assembly 62 to rotate anticlockwise as shown in fig. 3, so that the upper die 30 is driven to rotate in a reciprocating manner, and the lower die 40 is driven to swing in a reciprocating manner (the swing angle is small, and the control is performed through the tooth segment of the incomplete gear 64), so that a person skilled in the art can understand. The first bevel gear 65 drives the second gear lever 66 to rotate with the cam 600 through the second bevel gear 67 as shown in fig. 6: the cams 600 on the left and right sides of the upper die 30 rotate in opposite directions, when one side of the cam 600 props against the upper die 30, the other side of the cam 600 rotates far away from one side of the upper die 30, so that the left and right small-amplitude movement of the upper die 30 as shown in fig. 1 is realized, the upper die 30 is utilized to drive the lower die 40 to move left and right small-amplitude, and the casting solution is uniformly and fully filled in the casting cavity through the compound shaking of the left and right movement and the forward and backward deflection.
Step four, after the casting condensation is completed, starting the rotation shaft 21 to rotate so as to drive the positioning plate 20 to rotate around the central axis of the rotation shaft 21, thereby realizing that the upper die 30 is positioned at the lower side of the lower die 40; at this time, the upper mold 30 is separated from the lower mold 40 due to the weight of the upper mold 30 and the core block 320 themselves and the elastic force of the light spring 72; simultaneously, the gravity block 420 in the lower die 40 drives the L-shaped ejector rod 430 to move downwards by gravity, so that the formed blank or part in the groove 41 is ejected to the upper die 30, the demoulding of the formed blank or part is finished, and the subsequent taking is facilitated.
Step five, starting the rotation shaft 21 to rotate again, so that the upper die 30 is positioned on the upper side of the lower die 40 again, and returning the whole device to the initial position; and then casting the shell next time.
Claims (9)
1. The utility model provides a casting device for automobile transmission casing which characterized in that: the device comprises a door-shaped bracket (10), positioning plates (20), an upper die (30) and a lower die (40), wherein the number of the positioning plates (20) is two, the two positioning plates are respectively arranged on opposite side surfaces of two sides of the door-shaped bracket (10) in a rotating way, and the two positioning plates (20) are arranged in parallel; an upper die (30) and a lower die (40) are sequentially arranged between two positioning plates (20) from top to bottom, two sides of the upper die (30) are respectively connected with the corresponding positioning plates (20) through shaking mechanisms, a male die (31) is arranged in the middle of the lower end of the upper die (30), the cross section of the lower die (40) is of a convex structure, two sides of the lower die (40) are respectively connected with the corresponding positioning plates (20) through telescopic connecting mechanisms (45), grooves (41) are formed in the middle of bosses of the lower die (40) corresponding to the male die (31), and locking mechanisms are uniformly arranged on outer rings of the bosses and are connected with the upper die (30) through connecting sliding rods (50).
2. The casting device for an automotive transmission housing according to claim 1, characterized in that: the positioning plates (20) are respectively arranged on two sides of the portal support (10) in a rotating mode through rotating shafts (21), and the central axes of the two rotating shafts (21) are collinear.
3. A casting device for an automotive transmission housing according to claim 1 or 2, characterized in that: a first sliding cavity (32) is formed in the upper die (30), and an iron core block (320) is arranged in the first sliding cavity (32) in a sliding mode; the inner part of the upper die (30) of the outer ring of the first sliding cavity (32) is provided with a horizontal sliding groove (33) corresponding to the locking mechanism respectively, and the horizontal sliding groove (33) is communicated with the first sliding cavity (32); the outer wall of the iron core block (320) is provided with a connecting rod (330) corresponding to the horizontal chute (33), and the connecting rod (330) is in sliding connection with the horizontal chute (33); the connecting slide bar (50) is sequentially arranged into an upper thick bar section, a thin bar section and a lower thick bar section from top to bottom, the diameter of the upper thick bar section is identical to that of the lower thick bar section and is larger than that of the thin bar section, the upper die (30) is correspondingly connected with the connecting slide bar (50) to form a vertical hole (34) and the vertical hole (34) is communicated with a corresponding horizontal chute (33), one end, far away from the locking mechanism, of the connecting slide bar (50) penetrates through the corresponding vertical hole (34) and the thin bar section, which is connected with the slide bar (50), of the connecting rod (330) penetrates through the corresponding connecting rod (330), and the thin bar section, which is correspondingly connected with the slide bar (50), is provided with a sliding hole and the diameter of the sliding hole is smaller than that of the upper thick bar section.
4. A casting device for an automotive transmission housing according to claim 3, characterized in that: the shaking mechanism comprises a sliding seat (61), a telescopic assembly (62), a first gear rod (63), an incomplete gear (64), a first bevel gear (65), a second gear rod (66), a second bevel gear (67), a driven gear (68) and a toothed ring (69); the side surface of one side of the sliding seat (61) far away from the upper die (30) is in sliding connection with the corresponding positioning plate (20), and a tooth cavity (610) is arranged in the sliding seat (61); the telescopic component (62) is rotatably arranged in the tooth cavity (610), and the telescopic component (62) is connected with the corresponding side wall of the upper die (30); the tooth cavity (610) is positioned at the lower side of the telescopic component (62) and is rotationally provided with a first gear rod (63), and the outer wall of the first gear rod (63) is sequentially sleeved with an incomplete gear (64) and a first bevel gear (65); the bottom of the sliding seat (61) is rotatably provided with a second gear rod (66), the second gear rod (66) penetrates through the bottom surface of the sliding seat (61), the second gear rod (66) is positioned on the outer wall of the tooth cavity (610) and fixedly sleeved with a second bevel gear (67), and the second bevel gear (67) is meshed with the first bevel gear (65); the telescopic component (62) is positioned on the outer wall of the tooth cavity (610) and fixedly sleeved with the driven gear (68), and the driven gear (68) can be meshed with the incomplete gear (64); the driven gear (68) and the outer ring of the incomplete gear (64) are provided with a toothed ring (69), the outer wall of the toothed ring (69) is rotationally connected with the inner wall of the tooth cavity (610), and the inner ring of the toothed ring (69) is meshed with the driven gear (68) and can be meshed with the incomplete gear (64).
5. The casting device for an automotive transmission housing according to claim 4, characterized in that: the telescopic component (62) comprises a first sliding sleeve, a first sliding rod and a first spring, one end of the first sliding sleeve is rotationally connected with the side wall of the tooth cavity (610), the other end of the first sliding sleeve penetrates through the side wall of the corresponding sliding seat (61) and is rotationally connected with the side wall of the corresponding sliding seat, the first sliding rod is coaxially arranged at one end, close to the upper die (30), of the first sliding sleeve and is in sliding connection with the first sliding sleeve, one end, close to the upper die (30), of the first sliding rod is fixedly connected with the side wall of the upper die (30), and the other end of the first sliding rod is connected with the inner wall of the first sliding sleeve through the first spring.
6. The casting device for an automotive transmission housing according to claim 5, characterized in that: the outer wall of the second gear rod (66) positioned at the outer side of the sliding seat (61) is fixedly sleeved with the cams (600), and the cams (600) at the two sides of the upper die (30) face opposite directions.
7. The casting device for an automotive transmission housing according to claim 6, characterized in that: the top of the portal frame (10) is provided with a hydraulic lifting mechanism (11), and the lower end of the hydraulic lifting mechanism (11) is provided with an electromagnet (12).
8. The casting device for an automotive transmission housing according to claim 7, characterized in that: the telescopic connecting mechanism (45) comprises a second sliding sleeve, a second sliding rod and a second spring, the positioning plate (20) corresponds to the second sliding sleeve and is provided with an arc-shaped chute (23) by taking the axis of the first sliding rod as the center of a circle, and one end of the second sliding sleeve, which is far away from the lower die (40), is clamped in the corresponding arc-shaped chute (23) and is in sliding connection; one end of the second sliding sleeve, which is close to the lower die (40), is coaxially provided with a second sliding rod which is in sliding connection with the second sliding sleeve, one end of the second sliding rod, which is far away from the lower die (40), is connected with the inner wall of the second sliding sleeve through a second spring, and the other end of the second sliding rod is fixedly connected with the corresponding side wall of the lower die (40).
9. The casting device for an automotive transmission housing according to claim 8, characterized in that: the locking mechanism comprises a positioning block (71) and a light spring (72), wherein the positioning block (71) is arranged on the end face around a boss of the lower die (40) in a sliding manner, a positioning groove (44) is formed in the side wall of the boss of the lower die (40) corresponding to the positioning block (71), and the side face, close to the boss of the lower die (40), of the positioning block (71) is connected with the inside of the positioning groove (44) through the light spring (72); the upper end surface of the positioning block (71) is provided with an inclined chute (710) inclined from the middle part of the lower die (40) to the periphery, and the bottom of the connecting slide bar (50) is clamped in the corresponding inclined chute (710) and is in sliding connection.
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| CN202311386594.XA CN117123738B (en) | 2023-10-25 | 2023-10-25 | Casting device for automobile gearbox shell |
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| CN202311386594.XA CN117123738B (en) | 2023-10-25 | 2023-10-25 | Casting device for automobile gearbox shell |
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| CN117123738B CN117123738B (en) | 2024-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117840409A (en) * | 2024-03-06 | 2024-04-09 | 长春中誉集团有限公司 | Auto parts production casting equipment |
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| JPH079083A (en) * | 1993-06-24 | 1995-01-13 | Toyota Motor Corp | Manufacture of sand mold |
| KR20190047289A (en) * | 2017-10-27 | 2019-05-08 | 미다스주식회사 | The Rotary device for sand casting casting flask using furan resin hardener |
| KR102099517B1 (en) * | 2018-12-05 | 2020-04-08 | 허동욱 | Four-part mold which 2-shaft casting machine is applied |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117840409A (en) * | 2024-03-06 | 2024-04-09 | 长春中誉集团有限公司 | Auto parts production casting equipment |
| CN117840409B (en) * | 2024-03-06 | 2024-05-07 | 长春中誉集团有限公司 | Auto parts production casting equipment |
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| CN117123738B (en) | 2024-01-26 |
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