CN113305168B - Hydraulic pressurizing mold locking device for clack mold - Google Patents
Hydraulic pressurizing mold locking device for clack mold Download PDFInfo
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- CN113305168B CN113305168B CN202110442015.3A CN202110442015A CN113305168B CN 113305168 B CN113305168 B CN 113305168B CN 202110442015 A CN202110442015 A CN 202110442015A CN 113305168 B CN113305168 B CN 113305168B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
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Abstract
A hydraulic pressurizing mould locking device for a clack-matched mould comprises a frame, a matched mould mechanism and a pressurizing locking mechanism; pressure boost locking mechanism include booster mechanism and be used for carrying out the restraint mechanism of retraining to booster mechanism's motion, booster mechanism includes that an inside has the pressure boost slider in pressure boost chamber along the direction of compound die is equipped with the pressure cylinder of minor diameter and major diameter in proper order in the pressure boost cylinder sliding fit has the piston of exerting pressure sliding fit in the pressure cylinder sliding fit has the pressure boost piston, and locking mechanism drives the pressure boost slider and removes to preset the position, locks the position of pressure boost slider through restraint mechanism, and the power take off end of locking mechanism drives the piston of exerting pressure and removes in pressure boost chamber, makes the pressure boost piston action through passing pressure medium transmission pressure, applys big clamping force to lamella compound die. The pressurizing mechanism is driven by the die closing mechanism, has larger die opening and closing stroke, increases the die opening space of the die and is convenient for process operation.
Description
Technical Field
The invention relates to the technical field of metal plastic processing, in particular to a hydraulic pressurizing mold locking device for a clack mold.
Background
At present, for parts with a lateral groove structure, such as automobile hubs, a flap-type female die is formed by two or more flap-type die blocks during plastic forming. The female die clack blocks are closed during forming, and are laterally split after forming, and then the molded part can be ejected and demoulded.
The requirements of the process on the die are as follows: 1) the closing and parting actions of the valve closing module are rapid so as to improve the production efficiency; 2) when the valve closing module is closed, enough mould locking rigidity is required to prevent the mould from being outwards expanded by lateral mould expansion force in the forming process, so that defects of ellipse, flash and the like are caused, and the precision of a product is influenced.
When a common hydraulic mold clamping mechanism is adopted, if the pressure of a hydraulic cylinder is small, the rigidity of a mold is insufficient due to the compressibility of liquid; in order to ensure enough mold clamping force, a large-tonnage hydraulic cylinder is needed, so that the occupied space of the hydraulic cylinder is increased, the equipment investment proportion is increased, and the total production cost is increased; the moving speed of the mold clamping mechanism is reduced, and the productivity is affected.
The invention patent of the state of the patent No. 201910147674.7 provides a pressurizing mold-locking mechanism, which can solve the problems that the rigidity of a mold is low and the precision of a product is influenced due to small mold-locking force; when the hydraulic clamping device is used, the requirement on a hydraulic cylinder for providing clamping pressure can be reduced, and the production cost is reduced while the product precision is ensured. However, the patent adopts a mechanical pressurization mechanism, and the mechanism is relatively complex, the manufacturing requirement is high, and the cost is relatively high.
Disclosure of Invention
The invention provides a hydraulic pressurizing mold locking device for a clack mold, which aims to solve the technical problems that the rigidity of the mold is low and the precision of a product is influenced due to small mold clamping force in the prior art, and meanwhile, the production cost is reduced.
The technical scheme adopted by the invention is as follows: a hydraulic pressurization mode locking device for a clack-matched mold comprises a frame and a mold matching mechanism arranged on the frame and used for driving a clack-matched module to match the mold, wherein a pressurization locking mechanism is also arranged between a power output end of the mold matching mechanism and the clack-matched module;
the pressure boost locking mechanism include pressure boost mechanism and be used for carrying out the restraint mechanism that retrains to pressure boost mechanism's motion, pressure boost mechanism includes that an inside has the pressure boost slider in the pressure boost chamber is equipped with the pressure cylinder of minor diameter and major diameter in proper order along the direction of compound die in the pressure boost, sliding fit has the piston of exerting pressure in the pressure cylinder, the one end of the piston of exerting pressure stretches out outside the pressure boost slider and is connected with the power take off end of locking mechanism, sliding fit has the pressure boost piston in the pressure boost cylinder, the piston rod of pressure boost piston passes behind the cylinder cap to be connected with lamella compound die piece through the connecting piece, locking mechanism drives the pressure boost slider and removes to preset position, locks the position of pressure boost slider through the restraint mechanism, the power take off end of locking mechanism drives the piston and removes in the pressure boost chamber, makes the pressure boost piston move through passing pressure medium transfer pressure, a large clamping force is applied to the clapper mold.
Further preferably, the mold clamping mechanism is a main hydraulic cylinder fixedly arranged on the frame, and a piston rod of the main hydraulic cylinder drives the clack mold clamping module to clamp the mold through a pressurizing and locking mechanism.
Further preferably, the constraint mechanism comprises a side pressure cylinder arranged in the pressurizing slider, a side pressure plunger in sliding fit in the side pressure cylinder and a side pin connected with the side pressure plunger, the side pressure cylinder works, and the side pin is driven by the side pressure plunger to move and inserted into a pin hole in the frame to fix the position of the pressurizing slider.
Further optimizing, the side pressure cylinder is communicated with the pressurizing cavity through an oil way, and the pressure transmission medium in the pressurizing cavity drives the side pressure cylinder to work.
Further optimized, the two groups of constraint mechanisms are arranged, and the side pressure cylinders in the two groups of constraint mechanisms are symmetrically arranged on two sides of the pressurizing cavity.
Further optimize, the side round pin set up in the shrinkage pool of pressure boost slider side, be equipped with two at least spacing ends at the tip of side round pin.
Preferably, the frame is further provided with a shoulder for blocking the pressurizing slider from further moving.
Further optimization, a guide sliding mechanism which plays a role in guiding the pressurizing slide block during moving is further arranged in the frame.
The beneficial effects of the invention are:
one of them, in this scheme, set up pressure boost locking mechanism between die clamping mechanism's power take off end and lamella locking module, wherein pressure boost locking mechanism includes booster mechanism and the restraint mechanism that is used for carrying out the restraint to booster mechanism's motion, realize that die clamping mechanism drives unloaded pressure boost locking mechanism quick travel, when advancing to preset position, lock booster mechanism's position through restraint mechanism, die clamping mechanism continues to export and drives the pressure boost piston action wherein through the inside pressure medium that passes through booster mechanism, realize pressure boost output, carry out pressure boost locking to lamella locking die.
The pressure of the mould pressing mechanism can be amplified by the structure, the mould pressing mechanism has great mould locking rigidity, meanwhile, the stroke of the mould pressing and locking action is extremely short, the stroke of a hydraulic cylinder is basically not consumed, the pressurizing mechanism is driven by the mould pressing mechanism, the mould pressing mechanism has a large mould opening and closing stroke, the mould opening space of the mould is increased, and the process operation is convenient.
In the third scheme, the piston rod of the main hydraulic cylinder can drive the pressurizing locking mechanism and the clack mold closing module to be close fast, and the mold is closed slowly, so that the impact on the mold is avoided. When the main hydraulic cylinder returns, the pressure boosting mechanism firstly releases pressure, so that the mold closing force of the valve mold closing module is slowly reduced, and then the valve mold closing module is driven to quickly separate the mold. The pressurizing and locking mechanism has the characteristics of fast mold closing, slow pressurization, slow pressure relief and fast return in the working process.
In the fourth and the present scheme, the side pressure cylinder in the constraint mechanism is communicated with the pressurizing cavity in the pressurizing mechanism through an oil way, the pressure transmission medium in the pressurizing cavity drives the side pressure cylinder to work, the motion of the side constraint mechanism is realized by utilizing the pressure of the pressurizing cavity, and the orderly action of the pressurizing locking mechanism is realized.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of the present invention, in whichlIs a symmetrical central line, the left part is in an open mould state, and the right part is in a closed mould state;
fig. 2 is a schematic structural view of the side pin in fig. 1.
Reference numerals are as follows: 1. the hydraulic cylinder comprises a main hydraulic cylinder, 2, a cross beam, 3, a pressurizing slide block, 4, a connecting plate, 5, a side beam, 6, a clack mold block, 7, a cylinder cover, 8, a pressurizing piston, 9, a pressurizing piston, 10, a main hydraulic cylinder piston, 11, a screw, 12, a spring, 13, a screw, 14, a side pin, 15, a side pressure piston, m-pin holes, k, a side beam shoulder, a pressurizing cavity, b, an oil circuit and c, a side hydraulic cylinder,lthe central axis.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
It should be noted that: unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" or "the" and similar referents in the description and claims of the present invention are not to be construed as limiting in number but rather as indicating the presence of at least one. The word "comprise" or "comprises", and the like, indicates that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, but does not exclude other elements or items having the same function.
A hydraulic pressurization mode locking device for a clack-matched mold comprises a frame and a mold matching mechanism arranged on the frame and used for driving a clack-matched module to match the mold, wherein a pressurization locking mechanism is also arranged between a power output end of the mold matching mechanism and the clack-matched module;
the pressure boost locking mechanism include pressure boost mechanism and be used for carrying out the restraint mechanism that retrains to pressure boost mechanism's motion, pressure boost mechanism includes a inside pressure boost slider that has the pressurized cavity the direction of compound die is followed in proper order to be equipped with the pressure cylinder of minor diameter and major diameter in the pressurized cavity interior sliding seal cooperation has the piston of exerting pressure in the jar of exerting pressure, the one end of the piston of exerting pressure stretches out outside the pressure boost slider and is connected with the power take off end of locking mechanism, sliding seal cooperation has the pressurized piston in the pressurized cylinder, the one end of pressurized piston is passed the cylinder lid and is connected with lamella compound die piece through the connecting piece, when locking mechanism drives the pressurized slider and removes to preset position, locks the position of pressurized slider through the restraint mechanism, the power take off end of locking mechanism drives the piston of exerting pressure and removes in the pressurized cavity, makes the pressurized piston move through passing pressure medium transfer pressure, realize the pressure boost output, exert big clamping force to the lamella matched mold.
In the scheme, the mold clamping mechanism is a main hydraulic cylinder fixedly arranged on the frame, and a piston rod of the main hydraulic cylinder drives the flap mold clamping module to lock the mold through the pressurizing and locking mechanism.
In the scheme, the constraint mechanism comprises a side pressure cylinder arranged in the pressurizing slider, a side pressure plunger in sliding fit in the side pressure cylinder and a side pin connected with the side pressure plunger, wherein the side pressure cylinder works, and the side pin is driven by the side pressure plunger to move and is inserted into a pin hole in the frame to fix the position of the pressurizing slider.
In the scheme, the side pressure cylinder is communicated with the pressurizing cavity through an oil way, and the pressure transmission medium in the pressurizing cavity drives the side pressure cylinder to work.
In the scheme, two groups of constraint mechanisms are arranged, and the side pressure cylinders in the two groups of constraint mechanisms are symmetrically arranged on two sides of the pressurizing cavity.
Examples 1,
The specific structure of one embodiment of the present invention is described in detail below with reference to the accompanying drawings: as shown in fig. 1, in the present embodiment, a half-mold type female mold is composed of two half-mold modules as an example:
a hydraulic pressurization mode locking device for a clack-matched mold comprises a frame, a mold-matching mechanism and a pressurization locking mechanism, wherein the mold-matching mechanism is arranged on the frame and is used for driving a clack-matched module to match the mold, and the pressurization locking mechanism is connected between the mold-matching mechanism and the clack-matched module; the frame is formed by fixedly connecting a cross beam 2 and a side beam 5, and two groups of side beam shoulders k and pin holes m are symmetrically arranged on the inner side of the side beam 5; the die clamping mechanism is a main hydraulic cylinder 1 which is fixed on the cross beam 2 and is arranged in a bilateral symmetry way;
the pressurizing locking mechanism comprises a pressurizing mechanism and a restraining mechanism, wherein the pressurizing mechanism
The hydraulic press comprises a pressurizing slider 3 and a connecting plate 4, wherein a pressurizing cavity a is arranged in the pressurizing slider 3, a small-diameter pressurizing cylinder and a large-diameter pressurizing cylinder are sequentially arranged in the pressurizing cavity a along the die assembly direction, a pressurizing piston 9 is arranged in the pressurizing cylinder in a sliding sealing fit manner, and a piston rod of the pressurizing piston 9 is fixedly connected with a piston 10 of a main hydraulic cylinder 1 through threads; a pressurizing piston 8 is arranged in the pressurizing cylinder in a sliding and sealing fit mode, the pressurizing piston 8 is arranged on the pressurizing sliding block 3 through a cylinder cover 7, and a piston rod of the pressurizing piston 8 is fixedly connected to the connecting plate 4 through a screw 13;
when the small-diameter pressurizing piston 9 pressurizes the pressurizing cavity a, the large-diameter pressurizing piston 8 can generate a larger working pressure, and the pressurizing ratio is equal to the ratio of the cross-sectional areas of the pressurizing piston and the pressurizing piston; by way of example: the diameter of the pressurizing piston 9 is set tod 1 The booster piston 8 has a diameter ofd 2 Then the pressure increase ratio in the pressure increase mechanismnIs composed of
n=d 2 2 /d 1 2 。
Further, it is provided withd 2 =3d 1 The boost ratio may reach 9.
In this embodiment, the constraint mechanism includes side pressure cylinders c disposed on both sides of the pressurizing cavity a and communicated through an oil passage b, side pressure pistons 15 installed in sliding sealing fit with the side pressure cylinders c, and side pins 14 fixedly connected to the side pressure pistons 15; when the restraining mechanism works, the side pressure piston 15 and the side pin 14 move outwards and are inserted into the pin hole m of the frame to fixedly restrain the pressurizing mechanism, so that the pressurizing mechanism can generate a pressurizing effect to lock the die.
And sealing rings can be arranged between the sliding sealing matching surfaces.
In this embodiment, the connecting plate 4 is connected to the pressurizing slider 3 through a spring 12 and a screw 11, the clack module 6 is mounted on the connecting plate 4, and a slide guide mechanism is disposed between the pressurizing slider 3, the connecting plate 4 and the side beam 5, wherein the slide guide mechanism is not shown in the drawing.
In this embodiment, the side pin 14 has two limit ends, and the corresponding side beam 5 is provided with a pin hole matching with the side pin 14, so that when the main hydraulic cylinder drives the pressurizing slider to move to the side pin 14 corresponding to the pin hole on the side beam 5, the restraining mechanism acts to insert the side pin into the pin hole to complete the limit of the pressurizing slider.
In this embodiment, as shown in fig. 2, the side pin 14 is connected to the pressurizing slider 3 through a screw 15 and a spring 16, and the specific connection mode is as follows: the side pin is provided with a screw hole, a screw 15 passes through the screw hole and is screwed on the pressurizing slider 3, and a spring 16 is sleeved between a screw cap and a step surface in the screw hole.
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 boost locking mechanism is pushed by the master cylinder, the boost locking mechanism and the flap module can be driven to synchronously open and close the mold, wherein the moving direction when the flap module can be driven to close is the forward direction or the closing direction, and conversely, the moving direction when the flap module can be driven to open the mold is the backward direction. The pressurizing locking mechanism is of a bilaterally symmetrical structure, and the structures on the two sides are completely consistent.
The operation process of the embodiment is as follows:
step one, the die assembly mechanism works to drive the pressurizing locking mechanism and the petal die assembly module to rapidly advance, and the movement speed is controlled by a hydraulic system of a press;
step two, when the clack-closing module starts to close, the front end surface of the supercharging slide block 3 touches a shoulder k on the side beam to stop moving, and the side pin 14 is overlapped with the axis of a pin hole m on the side beam;
and step three, the mold clamping mechanism drives the pressing piston 9 to continue to move, the oil pressure of the pressurizing cavity a rises, at the moment, because the movement resistance of the side pin 14 is far smaller than that of the connecting plate 4, the pressure oil of the pressurizing cavity a firstly enters the side pressure cylinder c through the oil path b to push the side pin 14 to enter the pin hole m and lock the pressurizing slider 3, because a sufficient lateral stress area exists between the side pin 14 and the pin hole m, the enough mold clamping force can be borne, and after the side pin 14 enters the pin hole m, the pressurizing slider 3 is limited in movement and stops moving.
Step four, the pressure applying piston 9 continues to move, the oil pressure of the pressurizing cavity a rises, and the pressurizing piston 8 drives the connecting plate 4 to generate micro-motion so that the clack-closing module 6 is locked at high pressure;
step five, the press descends to carry out extrusion forming;
step six, the press returns, the mold clamping mechanism drives the pressing piston 9 to retreat, the oil pressure of the pressurizing cavity a is reduced, the connecting plate 4 approaches to the pressurizing slider 3 under the action of the elastic force of the spring 11, the side pin 13 retreats from the pin hole m under the action of the elastic force of the spring 16, and the strong constraint on the clack mold clamping module 6 is removed;
seventhly, the mold closing mechanism retreats continuously, the pressurizing piston 9 drives the pressurizing slide block 3, and the pressurizing mechanism and the valve mold closing module 6 are driven to retreat through the cylinder cover 7 and the pressurizing piston 4, so that the valve mold closing module is parting;
and step eight, ejecting the mechanism by a press to finish a forming process.
The hydraulic pressurizing mold locking device is applied to the extrusion forming processing of parts with lateral grooves, such as automobile hubs and the like; one group of pressurizing mechanisms can also be adopted and used in the occasions of liquid forging, low-pressure casting and the like which need to perform mold closing in advance and have large mold closing force, and when the pressurizing mold-locking mechanism is matched with a corresponding mold, the rigidity of the whole mold can be improved, and the load of equipment can be effectively reduced.
According to the hydraulic pressurization mode locking device for the split mold, two hydraulic pressurization mode locking devices which are bilaterally symmetrical are adopted to drive the split mold blocks consisting of the two cavity insert blocks to perform mode locking action, and four hydraulic pressurization mode locking devices which are symmetrically arranged along the circumference can also be adopted to drive the split mold blocks consisting of the four cavity insert blocks to perform mode locking action.
According to the embodiment of the invention, the main hydraulic cylinder drives the hydraulic pressurization mold locking device to move, when the pressurization mechanism moves to a certain position, the constraint mechanism fixedly constrains the pressurization mechanism, and then the main hydraulic cylinder provides power for the pressurization mechanism, so that the pressurization mechanism generates high-pressure output action to lock the mold. When the mold opening stroke of the clack-closing module is not large, the booster mechanism can be directly and fixedly restrained, and the booster mechanism is pressed by the main hydraulic cylinder to generate high-pressure output action so as to lock the mold.
It should be noted that while the invention has been described in terms of the above-mentioned embodiments, other embodiments are also possible. It will be apparent to those skilled in the art that various changes and modifications can be made herein without departing from the spirit and scope of the invention, and it is intended that all such changes and modifications fall within the scope of the appended claims and their equivalents.
Claims (6)
1. The utility model provides a hydraulic pressure boost mode locking device for lamella compound die utensil, includes the frame, sets up the locking mechanism that is used for driving lamella compound die piece to carry out the compound die on the frame, its characterized in that: a pressurizing locking mechanism is also arranged between the power output end of the die assembly mechanism and the petal die assembly module;
the pressure boost locking mechanism include pressure boost mechanism and be used for carrying out the restraint mechanism that retrains to pressure boost mechanism's motion, pressure boost mechanism includes that an inside has the pressure boost slider in the pressure boost chamber is equipped with the pressure cylinder of minor diameter and major diameter in proper order along the direction of compound die in the pressure boost, sliding fit has the piston of exerting pressure in the pressure cylinder, the one end of the piston of exerting pressure stretches out outside the pressure boost slider and is connected with the power take off end of locking mechanism, sliding fit has the pressure boost piston in the pressure boost cylinder, the piston rod of pressure boost piston passes behind the cylinder cap to be connected with lamella compound die piece through the connecting piece, locking mechanism drives the pressure boost slider and removes to preset position, locks the position of pressure boost slider through the restraint mechanism, the power take off end of locking mechanism drives the piston and removes in the pressure boost chamber, makes the pressure boost piston move through passing pressure medium transfer pressure, applying a large clamping force to the clack mold;
the constraint mechanism comprises a side pressure cylinder arranged in the pressurizing slider, a side pressure plunger piston matched in the side pressure cylinder in a sliding way and a side pin connected with the side pressure plunger piston, wherein the side pressure cylinder works, and the side pin is driven by the side pressure plunger piston to move and is inserted into a pin hole in the frame to fix the position of the pressurizing slider; the side pressure cylinder is communicated with the pressurizing cavity through an oil way, and a pressure transmission medium in the pressurizing cavity drives the side pressure cylinder to work.
2. The hydraulic pressurization mold locking device for a clack mold according to claim 1, characterized in that: the mould clamping mechanism is a main hydraulic cylinder fixedly arranged on the frame, and a piston rod of the main hydraulic cylinder drives the flap mould clamping module to lock the mould through the pressurizing and locking mechanism.
3. The hydraulic pressurization mold locking device for a clack mold according to claim 1, characterized in that: and two groups of the constraint mechanisms are arranged, and the side pressure cylinders in the two groups of the constraint mechanisms are symmetrically arranged at two sides of the pressurizing cavity.
4. The hydraulic boost mold locking apparatus for clack molds according to claim 1, characterized in that: the side pin is arranged in a concave hole in the side surface of the pressurizing slider, and the end part of the side pin is provided with at least two limiting end heads.
5. A hydraulic pressurization mold locking device for a clack mold according to claim 1, characterized in that: and the frame is also provided with a shoulder for blocking the pressurizing slide block from further moving.
6. A hydraulic pressurization mold locking device for a clack mold according to claim 1, characterized in that: and a guide sliding mechanism which plays a role of guiding the pressurizing slider when the pressurizing slider moves is also arranged in the frame.
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| CN202110442015.3A CN113305168B (en) | 2021-04-23 | 2021-04-23 | Hydraulic pressurizing mold locking device for clack mold |
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| CN202110442015.3A CN113305168B (en) | 2021-04-23 | 2021-04-23 | Hydraulic pressurizing mold locking device for clack mold |
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| DE102009012235A1 (en) * | 2008-03-20 | 2009-09-24 | Continental Teves Ag & Co. Ohg | Combined vehicle brake, has transmission comprising lead screw and threaded nut standing in contact with each other by rolling members, which are led to plastic or metallic roller cage |
| CN101725580A (en) * | 2009-11-21 | 2010-06-09 | 潘孝敏 | Hydraulic pressure cylinder |
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