CN214872866U - Upper die device of powder forming machine - Google Patents

Abstract

The utility model belongs to the technical field of powder forming machines, in particular to an upper die device of a powder forming machine, which comprises an upper die cavity, an upper die set and a power source; the power source comprises a conversion piece arranged on the upper die cavity, and the conversion piece comprises a crankshaft rotatably arranged on the upper die cavity, a connecting piece rotatably arranged on the crankshaft and an upper die handle connected with the connecting piece ball; two eccentric wheels are symmetrically arranged on two sides of the connecting piece, the two eccentric wheels are fixedly arranged on the crankshaft, and the axes of two sections of the crankshaft on which the two eccentric wheels are arranged coincide. The utility model can provide additional downward pretightening force when the upper module is at the bottom point, thereby ensuring that the powder has enough pressing force during the powder forming; and the device replaces the conventional straight tooth meshing transmission, so that the influence of transmission clearance, transmission abrasion and the like on the pressing force of the upper die set at the bottom point during press forming is greatly reduced.

Description

Upper die device of powder forming machine

Technical Field

The utility model belongs to the technical field of the powder forming machine, especially, relate to an last mould device of powder forming machine.

Background

Powder molding has been used in a large number of applications in material molding to produce parts of high hardness. The powder forming die generally comprises an upper die, a lower die and a middle die; during the forming process, the powder is generally extruded by descending the upper die and ascending the middle die, so that the powder is extruded and formed; and when the mold is released, the middle mold continuously rises to eject the product. Or after the upper die and the lower die are closed, the upper die and the lower die simultaneously move downwards, and powder is extruded by the middle die; after the powder is formed, the upper die and the lower die are opened, and the lower die continues to descend, so that a formed product is ejected through the middle die. Specifically, powder is filled into the lower die through a powder filling mechanism, and a product is obtained through the extrusion of the upper die and the lower die. The powder compression ratio is generally set to 2:1, so that the upper die and the lower die are lowered simultaneously during molding, and the powder is pressed by the middle die to complete extrusion molding.

However, in the process of closing and forming the mold, when the upper mold descends to the bottom point for press forming, the existing powder forming machine has insufficient pre-pressure given by the power source, and the reason is that the machine tool runs for a long time, and all transmission parts are easy to wear, so that the powder press forming part is not qualified due to insufficient pressing force when the upper mold descends to the bottom point, and the defective rate is high. In addition, the power source of the upper die mostly adopts the mutual meshing of straight gears to realize the transmission effect, but the mutual meshing of the straight gears has a gap between the straight gears, and the wear is caused after the straight gears are meshed for a long time, so that the loosening condition exists when the upper die descends to the bottom point for compression molding, and the sufficient pressing force cannot be provided, thereby influencing the qualified rate of powder molding.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an last mould device of powder forming machine aims at solving the powder forming machine among the prior art and goes up the mould and influence the technical problem of powder shaping suppression qualification rate because of the existence of self transmission structure defect and sufficient pre-pressure when going to the nadir.

In order to achieve the above object, an embodiment of the present invention provides an upper mold device of a powder forming machine, which comprises an upper mold cavity installed at the upper end of a frame of the powder forming machine, an upper mold set movably installed in the upper mold cavity and a power source driving the upper mold set to operate.

Optionally, the power source comprises a conversion piece arranged on the upper die cavity, and the conversion piece comprises a crankshaft rotatably arranged on the upper die cavity, a connecting piece rotatably arranged on the crankshaft, and an upper die handle connected with the connecting piece ball; the method is characterized in that: two eccentric wheels are symmetrically arranged on two sides of the connecting piece, the two eccentric wheels are fixedly arranged on the crankshaft, and the axes of two sections of the crankshaft on which the two eccentric wheels are arranged coincide. The structural design aims to provide downward pretightening force when the upper die set is positioned at the bottom point.

Optionally, the power source further comprises a power element connected with the conversion element, the power element comprises a motor arranged on a frame of the powder forming machine, a flywheel rotatably arranged on the upper die cavity, a pinion coaxially rotating with the flywheel and a bull gear fixedly arranged on the crankshaft, and the bull gear is connected with the pinion in a bevel gear meshing manner; the motor drives the flywheel to rotate in a belt pulley and belt driving mode, and drives the pinion to synchronously rotate so that the crankshaft rotates relative to the upper die cavity. The structural design aims to greatly reduce the influence of transmission clearance, transmission abrasion and the like on the pressing force of the upper module because the conventional straight tooth meshing transmission is replaced by a bevel gear meshing transmission mode.

Optionally, the connecting piece comprises a ball rotating joint connected with the upper die handle ball, a turbine flange plate in threaded connection with the ball rotating joint, a worm meshed with the turbine flange plate, and a connecting rod in rotating connection with the crankshaft; the meshed turbine flange plate and the meshed worm are contained in the inner cavity of the connecting rod. The structural design aims to realize fine adjustment of the position of the upper die shank by adjusting the worm.

Optionally, the connecting rod is sleeved on the crankshaft, and a wear-resistant ring is arranged between the connecting rod and the crankshaft. The structural design aims to slow down the wear rate of the crankshaft.

Optionally, the upper die shank is movably arranged on the upper die cavity through a sleeve assembly, and the sleeve assembly comprises a straight sleeve fixedly arranged on the upper die cavity and cone sleeves respectively arranged at two ports of the straight sleeve; the two cone sleeve sleeves are in transition fit with the straight sleeve and are in clearance fit with the upper die shank. The structural design aims to ensure the form and position tolerance of the upper die set in the vertical operation and improve the processing quality of powder forming.

Optionally, the upper module includes an upper mold plate fixedly connected to the upper mold handle, an air guide plate disposed on a bottom surface of the upper mold plate and connected to the air pipe, a functional rod connected to the upper mold handle in a piston manner, and an upper module disposed at a lower end of the functional rod. The structural design aims to protect the upper die handle due to the arrangement of the functional rod.

Optionally, a guide sleeve or a guide pillar matched with each other is respectively arranged on the upper die cavity and the upper die plate. The purpose of this structural design is in order to promote the precision of last module operation.

Optionally, the upper die cavity is of a three-cavity structure, the two eccentric wheels are respectively located in cavities on two sides of the upper die cavity, the connecting piece is located in the middle cavity of the upper die cavity, and a window is formed in the side wall of the middle cavity. The purpose of this structural design is because of the setting of window, be convenient for the regulation of worm rotation.

Optionally, a protective cover is arranged on the upper die cavity and covers the power source. The structural design aims at playing the roles of protection and safety.

Optionally, a plurality of hoisting rings are arranged on the upper die cavity. The upper die device of the powder forming machine is convenient to hoist, mount and the like.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in last mould device of powder forming machine has one of following technological effect at least:

1. the connecting piece is rotatably arranged on the crankshaft, the upper die handle is connected with the connecting piece in a ball connection mode, and the upper die handle is subjected to repeated extrusion molding operation due to the eccentric structure of the crankshaft in the process that the power source drives the crankshaft to rotate; the utility model discloses a be located the bilateral symmetry of connecting piece is equipped with two eccentric wheels, two the eccentric wheel set firmly in on the bent axle, install two the eccentric wheel two the structural design of two section position axes coincidence of bent axle makes and works as when the cope match-plate pattern is in the bottom point position, because of two the effect of the eccentric force of eccentric wheel is given and is connected go up on the die shank upward the downward pretightning force is additionally given when the cope match-plate pattern is in the bottom point, has enough big clamping-force when ensureing the powder shaping.

2. The motor is adopted to drive the flywheel to rotate in a belt pulley and belt driving mode, so as to drive the pinion to synchronously rotate and drive the bull gear to rotate, so that the crankshaft synchronously rotates; the utility model discloses a gear wheel with the pinion adopts helical gear meshing transmission mode, has replaced conventional straight-tooth meshing transmission, can effective straight-tooth gear intermeshing have self transmission clearance and influence that defects such as long-time meshing wearing and tearing brought, reduce by a wide margin because of transmission clearance and transmission wearing and tearing etc. are right go up the influence of packing force when the module is in bottom point press forming, and realize providing sufficient packing force and improve the fashioned qualification rate of powder.

3. Adopt the spheroid rotary joint with go up the die shank ball and connect, the spheroid rotary joint with turbine ring flange threaded connection reaches the worm with the structural design of turbine ring flange meshing, the accessible is adjusted the turned angle of worm realizes go up the die shank with the convenient fine setting of position between the connecting rod to the realization install in go up on the die shank go up the fine setting purpose of die group for the well mould of powder forming machine and the position of lower mould, compact structure, it is convenient to adjust.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural view of a powder forming machine according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an upper die device provided in an embodiment of the present invention;

fig. 3 is a schematic structural view of an upper die device (with a protective cover) according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a power source provided in an embodiment of the present invention;

fig. 5 is an exploded schematic view of a conversion member according to an embodiment of the present invention;

FIG. 6 is a schematic view of an assembly structure of the replacing part and the upper module according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an upper module according to an embodiment of the present invention;

fig. 8 is a schematic view of the assembly of the function rod, the upper die shank and the upper die block provided by the embodiment of the present invention;

wherein, in the figures, the respective reference numerals:

1-upper die device, 10-upper die chamber, 11-guide sleeve, 12-protective cover, 13-lifting ring, 14-window, 15-sleeve component, 151-straight sleeve, 152-conical sleeve, 20-upper die set, 21-upper die plate, 211-guide column, 22-air guide plate, 23-function rod, 24-upper die plate, 30-power source, 31-conversion piece, 311-crankshaft, 3111-eccentric wheel, 3112-wear-resistant ring, 312-connecting piece, 3121-sphere rotary joint, 3122-turbine flange plate, 3123-worm, 3124-connecting rod, 313-upper die handle, 32-power piece, 321-motor, 322-flywheel, 323-pinion gear and 324-gearwheel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1, 2 and 3, an upper die device 1 of a powder forming machine is provided, which includes an upper die chamber 10 installed at an upper end of a frame of the powder forming machine, an upper die set 20 movably installed in the upper die chamber, and a power source 30 for driving the upper die set 20 to operate. In this embodiment, the power source 30 is installed on the upper die cavity 10, the upper die set 20 is connected to the power source 30, and the power source 30 drives the upper die set 20 to move closer to or away from a middle die and a lower die of the powder forming machine, so as to form and process the powder. Further, in order to prevent the power source 30 from being affected by the outside and consider safety factors of operation, a protective cover 12 is disposed on the upper mold chamber 10, and the protective cover 12 covers the power source 30, so that the upper mold device 1 plays a role in protection and safety.

Further, in order to facilitate the lifting and mounting operations of the upper die device of the powder forming machine with the frame of the powder forming machine, the embodiment is implemented by providing a plurality of lifting rings 13 on the upper die chamber 10.

As shown in fig. 4, the power source 30 includes a converter 31 disposed on the upper mold chamber 10, and the converter 31 includes a crankshaft 311 rotatably disposed on the upper mold chamber 10, a connecting member 312 rotatably disposed on the crankshaft, and an upper mold handle 313 spherically connected to the connecting member. In a specific operation, during the rotation of the crankshaft 311 driven by the power source 30, the connecting member 312 is installed at an eccentric structure of the crankshaft 311, and the eccentric structure of the crankshaft 311 enables the upper die shank 313 to complete an extrusion molding operation with a middle die and a lower die of a powder molding machine repeatedly. The utility model discloses in, through being located connecting piece 312's bilateral symmetry is equipped with two eccentric wheels 3111, two eccentric wheel 3111 sets firmly in on the bent axle 311, the installation is two eccentric wheel 3111 two section position axis of bent axle 311 coincide mutually, make and work as when going up module 20 and being in the nadir position, because of two the effect of eccentric wheel 3111's eccentric force is given and is connected go up on the die shank 313 go up module 20 and additionally give decurrent pretightning force when being in the nadir, have enough big clamping-force when ensureing the powder shaping. In this embodiment, the upper mold cavity 10 is a three-cavity structure, the two eccentric wheels 3111 are respectively located in two side cavities of the upper mold cavity 10, and the converter 31 is located in a middle cavity of the upper mold cavity 10.

Further, the power source 30 further includes a power element 32 connected to the converting element 31, where the power element 32 includes a motor 321 disposed on the frame of the powder forming machine, a flywheel 322 rotatably disposed on the upper mold cavity 10, a pinion 323 coaxially rotating with the flywheel 322, and a bull gear 324 fixedly disposed on the crankshaft 311; preferably, the large gear 324 is connected with the small gear 323 in a bevel gear engagement manner; in this embodiment, the motor 321 drives the flywheel 322 to rotate by a belt pulley and belt driving manner, and drives the pinion 323 to rotate synchronously, so that the crankshaft 311 rotates relative to the upper mold cavity 10. The utility model discloses a gear wheel 324 with pinion 323 adopts helical gear meshing transmission mode, has replaced conventional straight-tooth meshing transmission, and effective straight-tooth gear intermeshing has the influence that self transmission clearance and defects such as long-time meshing wearing and tearing brought, reduces by a wide margin because of transmission clearance and transmission wearing and tearing etc. are right the influence of packing force when going up module 20 and being in bottom point press forming, and the realization provides sufficient packing force and improves the fashioned qualification rate of powder.

As shown in fig. 5, the connecting member 322 includes a ball rotary joint 3121 connected to the upper die shank 313 by a ball, a turbine flange 3122 screwed to the ball rotary joint, a worm 3123 engaged with the turbine flange, and a connecting rod 3124 rotatably connected to the crankshaft 311; the engaged turbine flange plate 3122 and the worm 3123 are accommodated in the inner cavity of the connecting rod 3124. The utility model discloses a spheroid swivelling joint 3121 with go up the die shank 313 ball and connect, spheroid swivelling joint 3121 with turbine ring flange 3122 threaded connection reaches worm 3123 with the structural design of turbine ring flange 3122 meshing, the accessible is adjusted worm 3123's turned angle realizes go up the die shank 313 with the convenient fine setting of position between connecting rod 3124, thereby the realization install in go up on the die shank 313 go up the module 20 for the fine setting purpose of the well mould of powder forming machine and the position of lower mould, compact structure, it is convenient to adjust. In this embodiment, as shown in fig. 3, in order to facilitate the adjustment of the worm 3123, a window 14 is opened on a side wall of the middle chamber of the upper mold chamber 10 to facilitate the manual adjustment.

Further, because the crankshaft 311 rotates at a high speed and the connecting rod 3124 rotates on the crankshaft 311, a contact surface between the crankshaft 311 and the connecting rod 3124 is prone to generate a large friction, in order to reduce the wear rate of the crankshaft 311 and to prolong the service life of the crankshaft 311 and the connecting rod 3124, the present invention provides a wear-resistant ring 3112 between the connecting rod 3124 and the crankshaft 311, so that the wear amount generated by the contact between the crankshaft 311 and the connecting rod 3124 is reduced by the wear of the wear-resistant ring 3112.

As shown in fig. 6, the upper mold handle 313 is movably disposed on the upper mold cavity 10 through a sleeve assembly 15, and the sleeve assembly 15 includes a straight sleeve 151 fixedly disposed on the upper mold cavity 10 and a conical sleeve 152 respectively disposed at two ports of the straight sleeve. Specifically, the two cone sleeves 152 are in transition fit with the straight sleeve 151 and in clearance fit with the upper die shank 313, so as to ensure the form and position tolerance of the upper die set 20 in the vertical operation and improve the processing quality of powder molding.

As shown in fig. 7 and 8, the upper die set 20 includes an upper die plate 21 fixed on the upper die shank 313, an air guide plate 22 disposed on the bottom surface of the upper die plate and connected to an air pipe, a functional rod 23 connected to the upper die shank 313 in a piston manner, and an upper die block 24 disposed at the lower end of the functional rod, and by the arrangement of the functional rod 23, the upper die shank 313 is prevented from directly acting on the upper die set 20, so as to protect the upper die shank 313, thereby prolonging the service life of the upper die shank 313. Further, in order to further improve the alignment precision of the upper die set 20 with respect to the middle die and the lower die of the powder forming machine, the present invention is implemented by arranging the guide sleeves 11 or the guide pillars 211 on the upper die cavity 10 and the upper die plate 21 respectively, wherein the guide sleeves or the guide pillars 11 are matched with each other; specifically, the guide sleeve 11 is disposed on the upper mold cavity 10, and the guide post 211 is disposed on the upper mold plate 21.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. An upper die device of a powder forming machine comprises an upper die cavity arranged at the upper end of a frame of the powder forming machine, an upper die set movably arranged in the upper die cavity and a power source for driving the upper die set to operate; the power source comprises a conversion piece arranged on the upper die cavity, and the conversion piece comprises a crankshaft rotatably arranged on the upper die cavity, a connecting piece rotatably arranged on the crankshaft and an upper die handle connected with the connecting piece ball; the method is characterized in that: two eccentric wheels are symmetrically arranged on two sides of the connecting piece, the two eccentric wheels are fixedly arranged on the crankshaft, and the axes of two sections of the crankshaft on which the two eccentric wheels are arranged coincide.

2. The upper die apparatus of the powder molding machine according to claim 1, characterized in that: the power source also comprises a power piece connected with the conversion piece, the power piece comprises a motor arranged on a frame of the powder forming machine, a flywheel rotationally arranged on the upper die cavity, a pinion coaxially rotating with the flywheel and a bull gear fixedly arranged on the crankshaft, and the bull gear is connected with the pinion in a bevel gear meshing manner; the motor drives the flywheel to rotate in a belt pulley and belt driving mode, and drives the pinion to synchronously rotate so that the crankshaft rotates relative to the upper die cavity.

3. The upper die apparatus of the powder molding machine according to claim 1, characterized in that: the connecting piece comprises a ball rotating joint connected with the upper die handle ball, a turbine flange plate in threaded connection with the ball rotating joint, a worm meshed with the turbine flange plate and a connecting rod in rotating connection with the crankshaft; the meshed turbine flange plate and the meshed worm are contained in the inner cavity of the connecting rod.

4. The upper die apparatus of the powder molding machine according to claim 3, wherein: the connecting rod is sleeved on the crankshaft, and a wear-resistant ring is arranged between the connecting rod and the crankshaft.

5. The upper die apparatus of the powder molding machine according to claim 1, characterized in that: the upper die handle is movably arranged on the upper die cavity through a sleeve assembly, and the sleeve assembly comprises a straight sleeve fixedly arranged on the upper die cavity and cone sleeves respectively arranged at two ports of the straight sleeve; the two cone sleeve sleeves are in transition fit with the straight sleeve and are in clearance fit with the upper die shank.

6. The upper die apparatus of the powder molding machine according to claim 1, characterized in that: the upper module comprises an upper template fixedly connected to the upper die handle, an air guide plate arranged on the bottom surface of the upper template and connected with an air pipe, a functional rod in piston connection with the upper die handle and an upper module arranged at the lower end of the functional rod.

7. The upper die apparatus of the powder molding machine according to claim 6, wherein: and the upper die cavity and the upper die plate are respectively provided with a guide sleeve or a guide pillar which are matched with each other.

8. The upper die device of the powder forming machine according to any one of claims 1 to 7, wherein: the upper die cavity is of a three-cavity structure, the two eccentric wheels are respectively located in cavities on two sides of the upper die cavity, the connecting piece is located in the middle cavity of the upper die cavity, and a window is formed in the side wall of the middle cavity.

9. The upper die device of the powder forming machine according to any one of claims 1 to 7, wherein: and a protective cover is arranged on the upper die cavity and covers the power source.

10. The upper die device of the powder forming machine according to any one of claims 1 to 7, wherein: and the upper die cavity is provided with a plurality of hoisting rings.

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