CN109746344B - Hub bulging device and mold locking mechanism thereof - Google Patents
Hub bulging device and mold locking mechanism thereof Download PDFInfo
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- CN109746344B CN109746344B CN201910147674.7A CN201910147674A CN109746344B CN 109746344 B CN109746344 B CN 109746344B CN 201910147674 A CN201910147674 A CN 201910147674A CN 109746344 B CN109746344 B CN 109746344B
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Abstract
The invention relates to the technical field of metal plastic processing, and provides a hub bulging device and a clamping mechanism thereof, which can solve the problems that in the prior art, the mold stiffness is low and the product precision is influenced due to small mold clamping force. The hub bulging device comprises a lamella joint module and a clamping mechanism, the clamping mechanism comprises a constraint frame and a mould closing constraint mechanism, and the mould closing constraint mechanism can push the lamella joint module to move oppositely in the left and right directions; the die assembly constraint mechanism comprises a fixer, a connector and a connecting rod mechanism which is symmetrical front and back; the connecting rod mechanism comprises a swing rod and a connecting rod, a convex part is arranged at the swing end of the swing rod, and a sliding cavity positioned on the outer side of the swing rod is arranged on the restraint frame; the spring is arranged between the fixer and the connector, the spring pushes the fixer to move synchronously when the connector is driven by the piston rod to perform die closing movement, the piston rod drives the connector to move forward continuously when the die closing is completed, the spring is compressed and enables the connecting rod and the oscillating bar to swing outwards, and the convex part slides into the sliding cavity and is matched with the sliding cavity to support the fixer to realize die locking.
Description
Technical Field
The invention relates to the technical field of metal plastic processing, in particular to a hub bulging device and a clamping mechanism thereof.
Background
At present, with the development of national economy, the automobile industry develops very rapidly, and the precision plastic forming technology of the light alloy automobile hub becomes the development direction of the automobile hub forming technology.
The invention discloses a set of combined dies for plastic forming of an automobile hub, wherein the set of combined dies comprises a split lower die and an upper die matched with the split lower die, the split lower die comprises more than two female die split blocks and a lower convex die arranged below the female die split blocks, an ejector is inserted in the center of the lower convex die in a sliding mode, the upper die comprises an extruding upper convex die and an expanding upper convex die matched with the split lower die, and the upper die and the split lower die are matched to form a die cavity matched with the hub to be manufactured.
When the complete combined die for the plastic forming of the automobile hub is used, the upper extruding male die of the upper die descends to extrude a blank, the spoke part of the hub and the rim part of the preformed hub are formed under the action of the lower male die, the ejector and the upper extruding male die, and then the upper bulging male die of the upper die descends and is matched with the female die clack block to form the rim part of the hub, so that the automobile hub is formed through plastic forming. But there are problems in that: when a blank is machined and formed, the deformation of the blank can generate a die expansion force for outwards expanding the die on the die, a hydraulic cylinder is required to provide a die closing pressure, and due to the compressibility of liquid, when the pressure of the hydraulic cylinder is smaller than the die expansion force, the rigidity of the die is insufficient, the defects of ellipse, flash and the like of a formed hub can occur, and the precision of a product is influenced; if in order to guarantee that the pneumatic cylinder provides sufficient compound die power in order to overcome the mould that expands, then need use the bigger pneumatic cylinder of tonnage, so both can increase the occupation space of pneumatic cylinder, again improve equipment input occupation ratio, make total manufacturing cost improve.
Disclosure of Invention
The invention aims to provide a clamping mechanism which can solve the problems that the rigidity of a mould is low and the precision of a product is influenced due to small mould clamping force in the prior art; another object of the present invention is to provide a hub bulging apparatus which has high rigidity of a die, can reduce the demand for a hydraulic cylinder which supplies a clamping pressure when in use, and can reduce the production cost while ensuring the product accuracy.
In order to achieve the purpose, the hub bulging device adopts the following technical scheme:
the wheel hub bulging device comprises a petal mold clamping module and a mold locking mechanism, wherein the mold locking mechanism comprises a constraint frame and mold clamping constraint mechanisms which are arranged on two opposite sides of the petal mold clamping module and connected with the petal mold clamping module, and the mold clamping constraint mechanisms are pushed by a hydraulic cylinder so as to push the petal mold clamping module to move oppositely in the left and right directions for mold clamping; the mould closing constraint mechanism comprises a fixer and a connector, the fixer is used for fixing the valve mould closing module, the connector is used for being connected with a piston rod of the hydraulic cylinder, and a connecting rod mechanism which is symmetrical in the front and back is arranged between the fixer and the connector; the connecting rod mechanism comprises a swing rod hinged with the fixer and a connecting rod hinged with the connector, the connecting rod and the swing rod are hinged with each other, a convex part is arranged at the swing end of the swing rod, and a sliding hole positioned on the outer side of the swing rod is arranged on the restraint frame; and a spring is arranged between the fixer and the connector, the spring pushes the fixer to move synchronously when the connector is driven by the piston rod to perform die closing movement, the piston rod drives the connector to move forward continuously when die closing is completed, and the spring is compressed and enables the connecting rod and the oscillating bar to swing outwards, so that the convex part slides into the sliding cavity and is matched with the sliding cavity to prop the fixer to realize die locking.
The beneficial effects are that: the hydraulic cylinder only needs to provide power for driving each petal mold closing module to open and close the mold and enabling the swing rod to slide into the sliding cavity, so that output pressure needed to be provided is small, after the convex part of the swing rod slides into the sliding cavity, the swing rod is supported between the constraint frame and the corresponding fixator, the constraint rigidity of the hub bulging device depends on the rigidity of the swing rod and the constraint frame and does not depend on the pressure provided by the hydraulic cylinder, and the constraint rigidity of the hub bulging device is large enough as long as the strength of the swing rod and the constraint frame is large enough. The mold locking mechanism improves the rigidity of the mold, the condition of mold expansion between the half mold closing modules is avoided, the pressure of the required hydraulic cylinder is correspondingly reduced, and the production cost is reduced while the product precision is ensured; meanwhile, the connecting rod and the oscillating bar can be separated from the restraint of the restraint frame when the die is opened, so that the die opening and closing stroke is large, the die opening space of the die is enlarged, and the process operation is convenient.
Furthermore, the sliding cavity is provided with a transition surface and a supporting surface which are connected smoothly, when the swing rod swings outwards, the convex part slides over the transition surface and then is abutted against and contacted with the supporting surface, the transition surface is provided with a convex cambered surface which is convexly arranged towards the corresponding valve closing module, and when the convex part slides over the transition surface, the convex part and the convex cambered surface are abutted and matched to enable the swing rod to move towards the corresponding valve closing module.
The beneficial effects are that: when the swing rod slides into the sliding cavity, the convex arc surface is matched with the swing rod to enable the swing rod to slightly move for a certain distance towards the corresponding valve closing module, pre-pressure is generated on the valve closing module, and the mold locking effect of the mold locking mechanism is improved.
Further, the convex part is positioned on the outer side of the hinge axis between the connecting rod and the swing rod.
The beneficial effects are that: the convex part is arranged on the outer side of the hinge axis between the connecting rod and the swing rod, and the convex part cannot interfere with other structures in the swing process of the swing rod, so that the connecting rod mechanism can stably work.
Furthermore, the die assembly restraining mechanism also comprises a limiting structure for preventing the connecting rod and the oscillating bar from swinging inwards.
The beneficial effects are that: set up limit structure in compound die restraint mechanism, guarantee that pull rod mechanism can outwards swing and can not be died by the card.
Or a pull rod guide post is arranged between the fixer and the connector, the pull rod guide post is in guide sliding fit with one of the fixer and the connector, the end part of the pull rod guide post is connected with the other, and a blocked step in guide sliding fit with the pull rod guide post is arranged on the pull rod guide post; the spring and the pull rod guide post are matched with each other to limit the maximum distance between the fixer and the connector, and a limiting structure for ensuring the outward bending of the connecting rod and the swing rod is formed.
The beneficial effects are that: the limiting structure consisting of the spring and the pull rod guide post enables the connecting rod and the swing rod to be bent outwards for a certain angle, when the mold is closed, the connecting rod and the swing rod cannot swing due to the acting force of the compression spring, when the valve closing module is closed, the spring is compressed by the mold closing force generated by the hydraulic cylinder, the connecting rod and the swing rod continue to swing outwards, and the pull rod guide post is simple in structure and convenient to achieve.
In order to achieve the purpose, the mode locking mechanism adopts the following scheme:
the clamping mechanism comprises a constraint frame and a clamping constraint mechanism which is arranged on two opposite sides of the split mold blocks and connected with the split mold blocks when in use, and the clamping constraint mechanism is pushed by a hydraulic cylinder so as to push the split mold blocks to move oppositely in the left and right directions for clamping; the mould closing constraint mechanism comprises a fixer and a connector, the fixer is used for fixing the valve mould closing module, the connector is used for being connected with a piston rod of the hydraulic cylinder, and a connecting rod mechanism which is symmetrical in the front and back is arranged between the fixer and the connector; the connecting rod mechanism comprises a swing rod hinged with the fixer and a connecting rod hinged with the connector, the connecting rod and the swing rod are hinged with each other, a convex part is arranged at the swing end of the swing rod, and a sliding hole positioned on the outer side of the swing rod is arranged on the restraint frame; and a spring is arranged between the fixer and the connector, the spring pushes the fixer to move synchronously when the connector is driven by the piston rod to perform die closing movement, the piston rod drives the connector to move forward continuously when die closing is completed, and the spring is compressed and enables the connecting rod and the oscillating bar to swing outwards, so that the convex part slides into the sliding cavity and is matched with the sliding cavity to prop the fixer to realize die locking.
The beneficial effects are as follows: when the hub bulging device is used, a piston rod of the hydraulic cylinder is connected with the connector, the hydraulic cylinder only needs to provide power for driving each petal mold closing module to open and close and enabling the swing rod to slide into the sliding cavity, so that output pressure needed to be provided is small, after the convex part of the swing rod slides into the sliding cavity, the swing rod is supported between the constraint frame and the corresponding fixator, at the moment, the constraint rigidity of the hub bulging device depends on the rigidity of the swing rod and the constraint frame and does not depend on the pressure provided by the hydraulic cylinder, and as long as the strength of the swing rod and the constraint frame is large enough, the constraint rigidity of the hub bulging device is large enough. The mold locking mechanism improves the rigidity of the mold, the condition of mold expansion between the half mold closing modules is avoided, the pressure of the required hydraulic cylinder is correspondingly reduced, and the production cost is reduced while the product precision is ensured; meanwhile, the connecting rod and the oscillating bar can be separated from the restraint of the restraint frame when the die is opened, so that the die opening and closing stroke is large, the die opening space of the die is enlarged, and the process operation is convenient.
Furthermore, the sliding cavity is provided with a transition surface and a supporting surface which are connected smoothly, when the swing rod swings outwards, the convex part slides over the transition surface and then is abutted against and contacted with the supporting surface, the transition surface is provided with a convex cambered surface which is convexly arranged towards the corresponding valve closing module, and when the convex part slides over the transition surface, the convex part and the convex cambered surface are abutted and matched to enable the swing rod to move towards the corresponding valve closing module.
The beneficial effects are that: when the swing rod slides into the sliding cavity, the convex arc surface is matched with the swing rod to enable the swing rod to slightly move for a certain distance towards the corresponding valve closing module, pre-pressure is generated on the valve closing module, and the mold locking effect of the mold locking mechanism is improved.
Further, the convex part is positioned on the outer side of the hinge axis between the connecting rod and the swing rod.
The beneficial effects are that: the convex part is arranged on the outer side of the hinge axis between the connecting rod and the swing rod, and the convex part cannot interfere with other structures in the swing process of the swing rod, so that the connecting rod mechanism can stably work.
Furthermore, the die assembly restraining mechanism also comprises a limiting structure for preventing the connecting rod and the oscillating bar from swinging inwards.
The beneficial effects are that: set up limit structure in compound die restraint mechanism, guarantee that pull rod mechanism can outwards swing and can not be died by the card.
Or a pull rod guide post is arranged between the fixer and the connector, the pull rod guide post is in guide sliding fit with one of the fixer and the connector, the end part of the pull rod guide post is connected with the other, and a blocked step in guide sliding fit with the pull rod guide post is arranged on the pull rod guide post; the spring and the pull rod guide post are matched with each other to limit the maximum distance between the fixer and the connector, and a limiting structure for ensuring the outward bending of the connecting rod and the swing rod is formed.
The beneficial effects are that: the limiting structure consisting of the spring and the pull rod guide post enables the connecting rod and the swing rod to be bent outwards for a certain angle, when the mold is closed, the connecting rod and the swing rod cannot swing due to the acting force of the compression spring, when the valve closing module is closed, the spring is compressed by the mold closing force generated by the hydraulic cylinder, the connecting rod and the swing rod continue to swing outwards, and the pull rod guide post is simple in structure and convenient to achieve.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment 1 of a hub bulging apparatus of the present invention, wherein a left side portion of fig. 1 is in an open mold state, a right upper portion is in an initial mold closing state, and a right lower portion is in a mold closing and force applying state;
FIG. 2 is a schematic view of the combination of the swing link, the connecting rod and the sliding cavity in the hub bulging apparatus of FIG. 1;
fig. 3 is a schematic diagram of the combination of the swing link, the connecting rod and the sliding cavity in embodiment 2 of the hub bulging apparatus of the present invention.
The respective symbols in the figure: 1. a connector; 2. a connecting rod; 3. a swing rod; 4. a holder; 5. a left half mold; 6. a constraint frame; 7. sliding points; 8. a pull rod guide post; 9. a slipper; 10. a slipper hinge shaft; 11. a first hinge shaft; 12. a second hinge shaft; 13. a third hinge shaft; 14. a right half mold; 15. an arc of oscillation; 16. a pressure spring; 31. a convex portion; 32. a curved surface; 71. a support surface; 72. a transition surface.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, in an embodiment 1 of the hub bulging apparatus of the present invention, the hub bulging apparatus includes a split mold block and a mold locking mechanism, where the split mold block is a molding cavity structure capable of being laterally split and used for hub bulging, the mold locking mechanism includes a constraint frame 6, and two mold closing constraint mechanisms connected to the split mold block, the mold closing constraint mechanisms are disposed on opposite sides of the split mold block, each mold closing constraint mechanism includes a holder 4 and a connector 1, when in use, the holder 4 is used for fixing the corresponding split mold block, the connector 1 is connected to a piston rod of a hydraulic cylinder providing mold closing force, and when the piston rod is operated, the piston rod can drive the connector 1 to correspondingly move. The left-right direction in fig. 1 is the left-right direction in the following description, and the up-down direction in fig. 1 is the front-back direction in the following description, and when the mold clamping restraining mechanism is pushed by the hydraulic cylinder, the petal mold blocks can be pushed to move in the left-right direction toward each other to perform mold clamping.
A link mechanism is arranged between the fixer 4 and the connector 1, the link mechanism is symmetrically arranged between the fixer 4 and the connector 1 along the front-back direction, and the link mechanism comprises a swing rod 3 and a connecting rod 2. The swing rod 3 is hinged to the connecting rod 2 through a second hinged shaft 12, the other end of the connecting rod 2 is hinged to the connector 1 through a first hinged shaft 11, the other end of the swing rod 3 is hinged to the fixer 4 through a third hinged shaft 13, the end, hinged to the connecting rod 2, of the swing rod 3 is a swing end of the swing rod 3, and the hinged shaft of the swing rod 3 and the hinged shaft of the connecting rod 2 deviates from a central axis of the swing rod 3. The end face of one end, close to the fixer 4, of the swing rod 3 is an arc face, a matching face which is matched with the arc face of the swing rod 3 and has the same curvature is arranged on the fixer 4, so that the contact area between the swing rod 3 and the fixer 4 is increased, the fixer 4 is driven to move through a link mechanism when the connector 1 moves, then the left half mold 5 and the right half mold 14 which are used as a clack mold block are closed, mold locking mechanisms connected to the left half mold 5 and the right half mold 14 are identical in structure, and only the mold locking mechanism on the left half mold 5 is described here.
Wherein, the outer side of the swing end of the swing link 3 is integrally provided with a convex part 31, the convex part 31 is positioned at one side of the hinge axis between the connecting rod 2 and the swing link 3, and the outer side surface of the convex part 31 is a curved surface 32. The restraint frame 6 comprises a side plate and an end plate connected to the end of the side plate, the side plate and the end plate are matched to form a frame structure, a sliding cavity 7 facing the left half mold 5 is formed in the inner side wall of the side plate of the restraint frame 6, a supporting surface 71 is arranged on the inner side of the sliding cavity 7, and the swing rod 3 swings outwards when pushed by the connecting rod 2, so that the convex part 31 of the swing rod 3 slides into the supporting surface 71 of the sliding cavity.
As shown in fig. 2, the sliding cavity 7 includes a supporting surface 71 for supporting the convex portion 31 and a transition surface 72 smoothly connected to the supporting surface 71, the supporting surface 71 is a matching curved surface matched with the curvature of the curved surface 32 on the convex portion 31, the transition surface 72 has a convex portion protruding from the swing arc 15 of the swing link 3 toward the left mold half 5, and the convex portion applies a pushing force to the convex portion 31 of the swing link 3 during the process that the convex portion 31 of the swing link 3 falls into the sliding cavity, so that the retainer 4 pushes the left mold half 5 to move toward the right mold half 14, and applies a pre-pressure to the mold clamping of the left mold half 5 and the right mold half 14, and the convex portion forms a convex arc surface on the transition surface 72 for pushing the swing link 3, and in other embodiments, the transition surface 72 and the convex arc surface thereon may be.
As shown in fig. 1, the mold closing movement direction of the left mold half 5 is rightward, and one side of the symmetry axis of the two sets of link mechanisms adjacent to the left mold half 5 is defined as an inner side. The fixer 4 is provided with a pull rod guide post 8, the connector 1 is provided with a guide post hole matched with the pull rod guide post 8, the guide post hole is matched with the pull rod guide post 8 to form a guide structure between the connector 1 and the fixer 4, one end of the pull rod guide post 8 facing the connector 1 is provided with a step, a stop table matched with the step stop is arranged in the guide post hole, the connector 1 and the fixer 4 can be limited by the matching of the stop table and the step, a spring in a pre-compression state is also arranged between the fixer 4 and the connector 1, namely, the pressure spring 16 can enable the fixer 4 to be at the maximum distance from the connector 1 under the action of the elastic force generated by the pressure spring 16 and the matching of the pull rod guide post 8 and the corresponding guide post hole, at the moment, the connecting rod 2 and the swing rod 3 are bent towards the outer side by a certain angle, and the pressure spring 16 and the pull rod guide post 8 are matched to form a limiting structure.
A pull rod guide post 8 and a pressure spring 16 are arranged between the fixer 4 and the connector 1, when the connector 1 is pushed to carry out mold closing movement, the pressure spring 16 drives the fixer 4 to synchronously act, when the mold closing is finished, the connector 1 is continuously pushed by a piston rod to further compress the pressure spring 16 and enable the link mechanism to swing outwards, and a swing rod and a connecting rod in the link mechanism swing outwards for a certain angle. The pressure spring 16 can generate elastic force for deviating the fixer 4 and the connector 1, the step of the pull rod guide post 8 is matched with the stop table in the guide post hole in a stop manner, so that the fixer 4 and the connector 1 have a determined relative position relation before the die assembly of the die assembly block, the angle between the connecting rod 2 and the swing rod 3 connected between the fixer 4 and the connector 1 has an angle which cannot change in the motion process, and when the die assembly block is subjected to pressure maintaining locking, the connecting rod 2 and the swing rod 3 can swing outwards and are matched with the constraint frame 6.
When the hub bulging device is used, the two fixers 4 are respectively connected with the left half die 5 and the right half die 14, the connector 1 is connected with a piston rod of a hydraulic cylinder, the piston rod of the hydraulic cylinder can drive the connectors 1 to move oppositely after outputting thrust, the connector 1 drives the fixers 4 to move rapidly through the connecting rods 2 and the swing rods 3, under the action of the pull rod guide posts 8 and the pressure springs 16, the distance between the fixers 4 and the connector 1 is unchanged, and the included angle between the swing rods 3 and the connecting rods 2 is unchanged in the process that the petal-shaped die blocks are close to each other.
The left half mould 5 stops moving after contacting the right half mould 14, the fixer 4 stops moving, a piston rod of the hydraulic cylinder continues to act, the pressure spring 16 is further compressed, the connector 1 continues to move towards the fixer 4, the connecting rod 2 pushes the swing rod 3 to swing outwards from fast to slow around the third hinge shaft 13 and slide into the sliding hole 7; when the convex part 31 on the swing rod 3 slides across the transition surface 72 of the sliding cavity, the transition surface 72 pushes the curved surface 32 of the convex part 31, so that an axial acting force is applied to the swing rod 3, the symmetrical acting force provides a pre-pressure for the die assembly of the left half die 5 and the right half die 14, and the fixer 4 moves slightly along the die assembly direction, so that the left half die 5 and the right half die 14 are further locked; when the convex part 31 on the swing rod 3 slides into the sliding cavity 7, the connecting rod 2 is nearly vertical to the swing rod 3 at the moment, and has a great force application effect along the swing direction, the convex part 31 of the swing rod 3 can be firmly fixed in the sliding cavity 7 of the constraint frame 6, and when the curved surface 32 at the outer side of the convex part 31 is matched with the transition surface 72 of the sliding cavity, a great contact area is formed between the curved surface 32 and the transition surface 72, so that great constraint force can be generated on the swing rod 3, and the great constraint force is applied to the clack module through the swing rod 3; the swing rod 3 is hinged with the fixer 4 through a third hinge shaft 13, and meanwhile, the outer arc surface of the hinged end of the swing rod 3 is in rotating fit connection with the fixer 4, so that the swing rod has a large contact area; the convex part 31 of the swing rod 3 is locked in the supporting surface 71, the die expansion force generated during blank forming is transmitted to the constraint frame 6 through the fixing device 4 and the swing rod 3, at the moment, the die closing rigidity of the die is only related to the rigidity of the two half dies, the fixing device 4, the swing rod 3 and the constraint frame 6 and the contact rigidity of the contact surfaces of all parts, but is basically unrelated to the pressure of the hydraulic cylinder, the acting force borne by the piston rod of the hydraulic cylinder is small, at the moment, the constraint rigidity of the hub bulging device depends on the rigidity of the swing rod 3 and the constraint frame 6 and does not depend on the pressure provided by the hydraulic cylinder, and as long as the strength of the constraint frame and the swing rod is large enough, the constraint rigidity of the hub bulging device.
The rigidity of the fixing device 4, the swing rod 3 and the constraint frame 6 is improved, the overall rigidity of the device can be increased, product defects such as burrs and flashes caused by die expansion are avoided, the forming precision of a wheel hub product is improved, in addition, the two ends of the swing rod 3 are in contact with each other through large cambered surfaces, the contact rigidity is very high, the whole mold locking mechanism has very high rigidity, the top support of the swing rod 3 between the constraint frame 6 and the fixing device 4 can effectively prevent the bulging of a petal-closing female die during the wheel hub bulging, and therefore the forming precision of the wheel hub product is effectively guaranteed. The hydraulic cylinder only needs to provide power for driving each petal mold closing module to open and close the mold and enabling the swing rod 3 to slide into the sliding cavity, the required pressure is small, and therefore a hydraulic cylinder with small tonnage can be selected; meanwhile, the connecting rod and the swing rod can be separated from the restraint of the restraint frame when the die is opened, so that the die opening and closing stroke is large, the die opening space of the die is enlarged, and the process operation is facilitated.
In the above embodiment, the mold clamping mechanism according to the present invention is applied to the hub forming process, and the mold clamping mechanism can be similarly applied to the cases where mold clamping is required in advance and mold clamping force is large, such as liquid forging and low-pressure casting, and when the mold clamping mechanism is engaged with a corresponding mold, the rigidity of the entire mold can be improved, and the load of the apparatus can be effectively reduced.
The following effects can be realized by adopting the hub bulging device and the clamping mechanism in the invention:
1. a piston rod of the hydraulic cylinder can drive the clack-closing module to approach quickly through the die-closing restraining mechanism.
2. When the die assembly is completed, the connector moves forward to enable the swing rod to swing outwards and slide into the sliding cavity to realize slow pressurization of the clack-closing module, and finally the swing rod is supported between the fixer and the constraint frame, so that the constraint on the clack-closing module is increased, and the rigidity of the integral die formed by the combination of the clack-closing modules is improved.
3. After the bulging processing is finished, a piston rod of the hydraulic cylinder returns, and the swing rod swings to the original position, so that the convex part on the swing rod is separated from the sliding cavity, and the pressure on the clack-closing module is reduced.
4. After the swing rod swings back to the original position, the piston rod of the hydraulic cylinder continues to return, and the die closing restraining mechanism drives the die closing modules to be away from each other at a high speed and return to the initial position.
In conclusion, the hub bulging device and the clamping mechanism thereof have the characteristics of fast die assembly, slow pressurization, slow pressure relief and fast return in the working process.
As shown in fig. 3, an embodiment 2 of the hub bulging apparatus of the present invention is different from the embodiment 1 in that: in the embodiment 1, the convex part and the swing rod are integrally formed, in the embodiment, the end part of the swing rod far away from the fixer is hinged with a sliding shoe 9 through a sliding shoe hinge shaft 10, the sliding shoe 9 is provided with an inclined surface, the convex part is formed by the sliding shoe 9, an inclined surface structure is correspondingly arranged on a sliding hole 7 of the restraint frame, and when the swing rod 3 swings outwards, the sliding shoe 9 can be contacted with the inclined surface structure; the oscillating bar 3 continues to swing, the sliding shoe 9 slides along the inclined plane of the sliding hole 7, and the reaction force of the sliding hole 7 to the sliding shoe 9 enables the oscillating bar 3 to slightly move a certain distance to one side of the die to lock the die. The sliding shoes 9 are in surface contact with the inclined plane structure, so that the contact area is large, the friction force is small, and the service life is longer.
In other embodiments, when only the spring is arranged, the connecting rod and the swing rod are provided with stop blocks which are mutually stopped when the connecting rod and the swing rod swing, when the connecting rod and the swing rod are not under the action of the connector, the stop blocks on the connecting rod and the swing rod are mutually stopped, the swing rod inclines outwards, and the stop blocks become the limit structures; or the connector is provided with a stop pin positioned at the inner side of the connecting rod, the connecting rod can only swing outwards under the limitation of the stop pin, or the fixer is provided with a stop pin positioned at the inner side of the swing rod, the swing rod can only swing outwards under the limitation of the stop pin, and the stop pin becomes a limiting structure.
In other embodiments, the transition surface, the support surface and the outer side surface of the convex part of the sliding cavity are both arc surfaces, the support surface and the transition surface are both inclined surfaces, the included angle between the support surface and the mold closing direction is larger than that between the transition surface and the mold closing direction, the sliding cavity is formed by the inclined surface and the inner side wall of the constraint frame in a matched mode, and the outer side surface of the convex part is an inclined surface.
In the above embodiments, the convex portion is disposed outside the hinge axis of the swing link, in other embodiments, the convex portion is integrally formed at the axial end portion of the swing link, and the connecting rod is inclined in a direction away from the convex portion, instead of disposing the convex portion outside the hinge axis between the connecting rod and the swing link.
The structure of the clamping mechanism in the invention is the same as that of the hub bulging device in the invention, so the description of the embodiment of the clamping mechanism is not repeated.
Claims (10)
1. Wheel hub bulging device, its characterized in that: the mould clamping mechanism comprises a constraint frame and mould clamping constraint mechanisms which are arranged on two opposite sides of the valve clamping module and connected with the valve clamping module, and the mould clamping constraint mechanisms are pushed by a hydraulic cylinder so as to push the valve clamping module to move oppositely in the left and right directions for mould clamping; the mould closing constraint mechanism comprises a fixer and a connector, the fixer is used for fixing the valve mould closing module, the connector is used for being connected with a piston rod of the hydraulic cylinder, and a connecting rod mechanism which is symmetrical in the front and back is arranged between the fixer and the connector; the connecting rod mechanism comprises a swing rod hinged with the fixer and a connecting rod hinged with the connector, the connecting rod and the swing rod are hinged with each other, a convex part is arranged at the swing end of the swing rod, and a sliding hole positioned on the outer side of the swing rod is arranged on the restraint frame; and a spring is arranged between the fixer and the connector, the spring pushes the fixer to move synchronously when the connector is driven by the piston rod to perform die closing movement, the piston rod drives the connector to move forward continuously when die closing is completed, and the spring is compressed and enables the connecting rod and the oscillating bar to swing outwards, so that the convex part slides into the sliding cavity and is matched with the sliding cavity to prop the fixer to realize die locking.
2. The hub expander of claim 1, wherein: the sliding cavity is provided with a transition surface and a supporting surface which are connected smoothly, the convex part slides over the transition surface and then is abutted and contacted with the supporting surface when the swing rod swings outwards, the transition surface is provided with a convex cambered surface which is convexly arranged towards the corresponding petal mold closing block, and the convex part and the convex cambered surface are abutted and matched when the convex part slides over the transition surface so that the swing rod moves towards the corresponding petal mold closing block.
3. The hub expander of claim 2, wherein: the convex part is positioned on the outer side of a hinge axis between the connecting rod and the swing rod.
4. The hub expander device of any one of claims 1-3, wherein: the die assembly restraining mechanism further comprises a limiting structure for preventing the connecting rod and the oscillating bar from swinging inwards.
5. The hub expander device of any one of claims 1-3, wherein: a pull rod guide pillar is arranged between the fixer and the connector, the pull rod guide pillar is in guide sliding fit with one of the fixer and the connector, the end part of the pull rod guide pillar is connected with the other, and a step which is blocked and in guide sliding fit with the pull rod guide pillar is arranged on the pull rod guide pillar; the spring and the pull rod guide post are matched with each other to limit the maximum distance between the fixer and the connector, and a limiting structure for ensuring the outward bending of the connecting rod and the swing rod is formed.
6. Clamping mechanism, its characterized in that: the hydraulic cylinder is used for pushing the split mold blocks to move oppositely in the left and right directions to carry out mold closing; the mould closing constraint mechanism comprises a fixer and a connector, the fixer is used for fixing the valve mould closing module, the connector is used for being connected with a piston rod of the hydraulic cylinder, and a connecting rod mechanism which is symmetrical in the front and back is arranged between the fixer and the connector; the connecting rod mechanism comprises a swing rod hinged with the fixer and a connecting rod hinged with the connector, the connecting rod and the swing rod are hinged with each other, a convex part is arranged at the swing end of the swing rod, and a sliding hole positioned on the outer side of the swing rod is arranged on the restraint frame; and a spring is arranged between the fixer and the connector, the spring pushes the fixer to move synchronously when the connector is driven by the piston rod to perform die closing movement, the piston rod drives the connector to move forward continuously when die closing is completed, and the spring is compressed and enables the connecting rod and the oscillating bar to swing outwards, so that the convex part slides into the sliding cavity and is matched with the sliding cavity to prop the fixer to realize die locking.
7. The clamping mechanism of claim 6, wherein: the sliding cavity is provided with a transition surface and a supporting surface which are connected smoothly, the convex part slides over the transition surface and then is abutted and contacted with the supporting surface when the swing rod swings outwards, the transition surface is provided with a convex cambered surface which is convexly arranged towards the corresponding petal mold closing block, and the convex part and the convex cambered surface are abutted and matched when the convex part slides over the transition surface so that the swing rod moves towards the corresponding petal mold closing block.
8. The clamping mechanism of claim 7, wherein: the convex part is positioned on the outer side of a hinge axis between the connecting rod and the swing rod.
9. The clamping mechanism according to any one of claims 6-8, wherein: the die assembly restraining mechanism further comprises a limiting structure for preventing the connecting rod and the oscillating bar from swinging inwards.
10. The clamping mechanism according to any one of claims 6-8, wherein: a pull rod guide pillar is arranged between the fixer and the connector, the pull rod guide pillar is in guide sliding fit with one of the fixer and the connector, the end part of the pull rod guide pillar is connected with the other, and a step which is blocked and in guide sliding fit with the pull rod guide pillar is arranged on the pull rod guide pillar; the spring and the pull rod guide post are matched with each other to limit the maximum distance between the fixer and the connector, and a limiting structure for ensuring the outward bending of the connecting rod and the swing rod is formed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910147674.7A CN109746344B (en) | 2019-02-27 | 2019-02-27 | Hub bulging device and mold locking mechanism thereof |
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| CN201910147674.7A CN109746344B (en) | 2019-02-27 | 2019-02-27 | Hub bulging device and mold locking mechanism thereof |
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| CN109746344B true CN109746344B (en) | 2020-04-07 |
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| CN111790870A (en) * | 2020-08-17 | 2020-10-20 | 广州市秀全电线电缆有限责任公司 | Numerical control hydraulic machine for metal plastic forming |
| CN113305168B (en) * | 2021-04-23 | 2022-07-26 | 河南科技大学 | Hydraulic pressurizing mold locking device for clack mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4009018A (en) * | 1975-07-07 | 1977-02-22 | Emhart Industries, Inc. | Glassware forming machine of the I. S. type with in-line mold motion |
| CN101804432B (en) * | 2010-04-09 | 2013-11-13 | 潘卫民 | Rolling ring machine with internally supported rim |
| CN202318833U (en) * | 2011-12-14 | 2012-07-11 | 德马格塑料机械（宁波）有限公司 | Double-oil-cylinder built-in injection molding machine mold clamping mechanism |
| CN203830620U (en) * | 2014-04-28 | 2014-09-17 | 象山杰尔德智能科技有限公司 | Radial extrusion die for bracket wedge mode locking cross shaft |
| CN106077220A (en) * | 2016-07-08 | 2016-11-09 | 枣庄运达机床有限公司 | Combined vertical rim rolling machine |
| CN106734479B (en) * | 2016-12-26 | 2019-02-05 | 温岭市越成机械有限公司 | A kind of internally supported rim formula spinning machine |
| CN206812386U (en) * | 2017-06-21 | 2017-12-29 | 宁波力维机械科技有限公司 | Injection machine toggle type mould clamping system lock shaft lubrication system |
| CN207695409U (en) * | 2017-12-25 | 2018-08-07 | 河南泰田重工机械制造有限公司 | Horizontal hub shape expanding machine |
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