CN210254174U - Rotor casting machine - Google Patents

Abstract

The utility model provides a rotor casting machine, which comprises a lower die mechanism, an upper die mechanism and a die pressing mechanism, wherein the lower die mechanism is arranged below the upper die mechanism; the upper die mechanism and the lower die mechanism are matched with each other through ordered movement and corresponding structures to form a die cavity of the rotor casting part together, so that the structure is simple, and the processing cost is low; the driving based on the die pressing mechanism can simultaneously realize the driving of the upper die mechanism and the pressure when the casting part is molded, and the operation difficulty is lower. Based on the utility model provides a rotor of rotor casting machine production, the shaping of casting portion is of high quality, has good practicality in the in-service use.

Description

Rotor casting machine

Technical Field

The utility model relates to the casting rotor field, concretely relates to rotor casting machine.

Background

Fig. 1 shows a three-dimensional structural representation of a cast rotor. There is currently a cast rotor in the industry that includes a rotor core 101 and a cast portion that includes a first end cap 102, a second end cap 103, and a plurality of connecting bars cast inside the rotor core 101.

For this kind of cast rotor, because first end cap 102 and second end cap 103 are connected through the connecting strip, and the connecting strip is formed inside the iron core, because the closure of first end cap 102 and second end cap 103 after the shaping, can't directly observe the connecting strip, therefore, when the casting portion shaping, the shaping quality of connecting strip is difficult to guarantee.

For the cast rotor, the rotor casting machine in the prior art has the disadvantages of complex structure, more parts, high driving difficulty, high requirement on casting equipment, high manufacturing cost and inconvenience for low-cost production of the cast rotor.

SUMMERY OF THE UTILITY MODEL

In order to realize the high-quality and low-cost production of the cast rotor, the utility model provides a cast rotor die, a die casting machine and a centrifugal casting machine, which have fewer parts, simple structure, easy driving, lower manufacturing cost and operation difficulty; the cast rotor manufactured based on the cast rotor die, the die casting machine and the centrifugal casting machine has good molding quality and good practicability in actual production.

Correspondingly, the utility model provides a rotor casting machine, rotor casting machine includes lower die mechanism, upper die mechanism and die pressing mechanism, is provided with a central axis on the rotor casting machine, lower die mechanism sets up in upper die mechanism below;

the lower die mechanism comprises a lower die, the lower die is provided with annular lower die cavity inner bulges and lower die cavity outer bulges, and the axes of the lower die cavity inner bulges, the lower die cavity outer bulges and the central axis are collinear; (ii) a

The upper die mechanism comprises an active driving plate, an end cover die, a passive driving plate, a surrounding die, a guide post die and a passive guide post;

the drive plate moves along the central axis, the end cap mold is fixed below the drive plate and the axis of the end cap mold is collinear with the central axis;

the passive driving plate and the surrounding mould are respectively positioned above and below the active driving plate; the middle part of the guide post die is in sliding fit with the driving drive plate, and two ends of the guide post die are respectively connected and fixed with the driven drive plate and the surrounding die; the axis of the guide post die is collinear with the central axis, the guide post die penetrates through the driving plate and is in sliding fit with the end cover die, and the upper end of the guide post die is fixedly connected with the driven driving plate;

the surrounding mould is provided with a rotor core hole along the axial direction, and the outer diameter of the end cover mould is matched with the inner diameter of the rotor core hole;

the die pressing mechanism is provided with an output end which moves along the direction of the central axis, and the output end is connected with the driving plate.

In an optional embodiment, the lower die mechanism comprises a die driving hydraulic cylinder, a die guide plate, a die driving guide column and a die driving module;

the die driving hydraulic cylinder body is fixed, and the output end of the die driving hydraulic cylinder faces to the lower part of the central axis and is connected with the die driving plate; the die guide plate is positioned below the die driving plate and is relatively fixed with the die driving hydraulic cylinder body; the pressing die driving guide column is in sliding fit with the pressing die guide plate, and two ends of the pressing die driving guide column are respectively connected and fixed with the pressing die driving plate and the pressing die driving module;

and the pressing die driving module is fixedly connected with the driving plate.

In an optional embodiment, the rotor casting machine further comprises a bottom plate, and the lower die mechanism further comprises a die fixing guide pillar and a die fixing plate;

the two ends of the pressing die fixing guide column are respectively connected and fixed with the bottom plate and the pressing die fixing plate, the pressing die guide plate is fixed in the middle of the pressing die fixing guide column, and the pressing die driving plate is in sliding fit with the pressing die fixing guide column;

the driving hydraulic cylinder body is fixed on the die fixing plate, and the output end of the driving hydraulic cylinder penetrates through the die fixing plate to be fixedly connected with the die driving plate.

In an optional implementation manner, the die driving module includes an annular upper plate, an annular middle plate and an annular lower plate which are sequentially arranged from top to bottom and integrally connected;

the inner diameters of the annular upper plate and the annular lower plate are smaller than the outer diameter of the driving plate, and the inner diameter of the annular middle plate is larger than or equal to the outer diameter of the driving plate;

the drive plate fits between the annular upper plate and the annular lower plate.

In an optional implementation mode, the lower die mechanism further comprises a thimble, a lower die cavity through hole is formed between the lower die cavity inner protrusion and the lower die cavity outer protrusion, and the thimble is arranged in the lower die cavity through hole.

Optional embodiment, the thimble sets up in the lower mould cavity through-hole, just the thimble outer wall with be provided with the constant voltage clearance between the lower mould cavity through-hole inner wall, the interval (0,0.1mm) that is of constant voltage clearance size range.

In an optional embodiment, the guide pillar mold is provided with a shaft hole matching section, a step matching section and an end cover matching section, wherein the wire diameter of the shaft hole matching section, the step matching section and the end cover matching section are gradually increased from the lower end face.

In an alternative embodiment, the surrounding mold bottom surface is planar across the end cap mating section.

In an alternative embodiment, the transition between the top surface of the surrounding mold and the rotor core bore is based on a bevel, which forms a funnel-shaped orifice.

In an optional embodiment, the rotor casting machine further comprises a tray, and the lower die mechanism is fixed on the tray;

the upper die mechanism further comprises a driving guide pillar, the lower end of the driving guide pillar is fixed on the tray, and the axis of the driving guide pillar is parallel to the central axis;

the driving plate is in sliding fit with the driving guide post.

The embodiment of the utility model provides a rotor casting machine, the lower die of the casting rotor machine discharges the air in the die cavity through the arrangement of constant pressure clearance, which is beneficial to improving the molding quality of the casting part; the lower die, the surrounding die, the guide column die, the end cover die and the rotor core are combined together to form a die cavity, and through the structural design of parts, only the axial stress of the end cover die is considered, so that the operation difficulty is low; the upper die mechanism is reasonably designed in structure, the driving of the surrounding die, the guide post die and the end cover die can be realized only by driving the driving plate through the die pressing mechanism, and the driving mode is simple; the driving force of the die pressing mechanism to the driving plate is distributed evenly, so that stable pressure is formed, stress of molten metal at each position is balanced when the molten metal is cooled, and forming quality of the casting part is improved. Based on the utility model provides a casting rotor of rotor casting machine production, the shaping of casting portion is of high quality, has good practicality in the in-service use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. Fig. 1 shows a schematic three-dimensional structure diagram of a rotary robot according to an embodiment of the present invention;

FIG. 1 shows a schematic view of a cast aluminum rotor according to an embodiment of the present invention;

fig. 2 shows a partially enlarged schematic view of a rotor of an embodiment of the invention at a viewing angle a;

fig. 3 shows a partially enlarged schematic view of a cast aluminum rotor according to an embodiment of the present invention at a viewing angle b;

FIG. 4 shows a schematic three-dimensional structure of a rotor casting machine according to an embodiment of the present invention;

fig. 5 shows a schematic three-dimensional structure diagram of a lower die mechanism according to an embodiment of the present invention;

fig. 6 shows a schematic three-dimensional structure diagram of an upper die mechanism according to an embodiment of the present invention;

fig. 7 shows a schematic three-dimensional structure diagram of the die pressing mechanism according to the embodiment of the present invention;

FIG. 8 is a schematic structural view of a rotor casting machine in step S1 according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a rotor casting machine in step S2 according to an embodiment of the present invention;

fig. 10 shows a schematic structural diagram of the rotor casting machine in step S3 according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Fig. 1 shows the cast aluminum rotor schematic view of the embodiment of the present invention, fig. 2 shows the rotor local enlargement schematic view at the a viewing angle of the embodiment of the present invention, and fig. 3 shows the cast aluminum rotor local enlargement schematic view at the b viewing angle of the embodiment of the present invention.

The embodiment of the utility model provides a cast rotor mould for cast aluminium rotor 10. The cast aluminum rotor 10 includes a rotor core 101 and a cast portion including a first end cover 102, a second end cover 103, and a plurality of tie bars cast into the rotor core 101.

Specifically, the shaft part of the rotor core 101 is provided with a through shaft hole 104 for connecting and driving a transmission shaft; a first step 111 is formed between the top surface of the rotor core 101 and the shaft hole 104, and the bottom surface of the rotor core 101 is a flat bottom surface 112; in addition, a plurality of through-cast through holes 110 are uniformly arranged in the rotor core 101 in the circumferential direction; connecting bars (not shown) are formed in the casting through holes, two ends of the connecting bars are respectively connected with the first end cover 102 and the second end cover 103, and the first end cover 102, the second end cover 103 and the conducting bars are combined to form a squirrel-cage-shaped rotor winding.

In addition, a plurality of weights are respectively disposed on the first end cover 102 and the second end cover 103, and for convenience of description, the weight on the first end cover 102 is named as a first weight 121, and the weight on the second end cover 103 is named as a second weight 131.

Fig. 4 shows a three-dimensional structure diagram of the rotor casting machine according to the embodiment of the present invention. The rotor casting machine provided by the embodiment of the utility model comprises a lower die mechanism 20, an upper die mechanism 30 and a die pressing mechanism 50; the upper die mechanism 20 and the upper die mechanism 30 are respectively matched with the rotor core 10 to form a die cavity, wherein a casting through hole in the rotor core 10 is used for forming a connecting bar, the lower die mechanism 20 is used for forming a second end cover, and the upper die mechanism 30 is used for forming a first end cover; the mold pressing mechanism 50 is used for providing a certain pressure to the mold cavity to ensure the molding quality of the casting part.

Fig. 5 shows the three-dimensional structure diagram of the lower mold mechanism of the embodiment of the present invention, and for the sake of clarity, the lower mold mechanism structure is illustrated, and a part of the structure of the lower mold mechanism is cut open, wherein the black surface is a cutting surface. The utility model discloses lower mould mechanism 20 includes bed die 201 and thimble 211, and is right for more clear the utility model discloses casting rotor mold's structure explains the utility model discloses axis on the virtual root space is as the central axis 90 among the casting rotor mold.

In addition, in order to fix the lower mold 201, the cast rotor mold according to the embodiment of the present invention further includes a tray 406; the tray 406 is provided with two connecting blocks 408 which are respectively arranged at two sides of the central axis; the lower die 201 is fixed on the top surfaces of the two connecting blocks 408, and the mounting positions of the lower die are raised based on the two connecting blocks 408; the bottom surface of lower mold 201 is partially suspended, and ejector pins 211 can be inserted from the suspended position.

Specifically, the lower mold 201 of the embodiment of the present invention is provided with a lower mold cavity 204. In order to form the lower mold cavity 204, the lower mold 201 is provided with a lower mold cavity inner protrusion 203 at the inner side of the lower mold cavity 204, the lower mold 201 is provided with a lower mold cavity outer protrusion 202 at the outer side of the lower mold cavity 204, and the lower mold 201 is provided with a lower mold cavity through hole 205 at the bottom of the lower mold cavity 204, namely, between the lower mold cavity inner protrusion 203 and the lower mold cavity outer protrusion 202; ejector pins 211 are disposed in the lower mold cavity through holes 205.

In order to fix the ejector pins 211 conveniently, an ejector pin fixing plate 210 is arranged at the lower part of the lower die 201, the ejector pin fixing plate 210 is fixed below the lower die 201, the lower ends of the ejector pins 211 are fixed on the ejector pin fixing plate 210, and the upper ends of the ejector pins 211 extend into the corresponding lower die cavity through holes 205.

With reference to the above description about the rotor core structure, aiming at the cast rotor structure of the embodiment of the present invention, the end surface of the protrusion 203 in the lower mold cavity of the embodiment of the present invention contacts with the bottom surface of the rotor core for sealing the shaft hole of the rotor core; the lower die cavity outer bulge 202 surrounds the outer wall of the rotor core, and the inner wall of the lower die cavity outer bulge 202 is matched with the outer wall of the rotor core and used for positioning the rotor core and sealing a lower die cavity.

In specific implementation, considering the manufacturing tolerance of the rotor core and considering the problem of the sealing performance of the lower die cavity 204, the maximum value of the line diameter difference between the outer wall of the rotor core and the inner wall of the outer protrusion 202 of the lower die cavity needs to be controlled within the range of 0.5mm, namely, in the design process, the line diameter of the inner wall of the outer protrusion 202 of the lower die cavity is added with 0.5mm on the basis of the maximum value of the outer diameter of the rotor core; assuming that the maximum value of the outer diameter of the rotor core (including the manufacturing error of the rotor core) is D, the inner diameter of the outer protrusion 202 of the lower mold cavity is D +0.5 mm.

Because the rotor core needs to be preheated before operation, the rotor core can expand, so that the outer wall of the rotor core is tightly attached to the inner wall of the outer bulge 202 of the lower die cavity to form sealing, and molten metal is prevented from flowing out. It should be noted that the lower mold 201 also needs to be preheated before operation, but due to size difference and material difference, the expansion degree of the lower mold cavity outer protrusion 202 is smaller than that of the rotor core, so that the rotor core outer wall can be tightly fitted on the inner wall of the lower mold cavity outer protrusion 202.

Lower mold cavity through hole 205 and ejector pin 211 are used to form a second counterweight on the second end cap, wherein ejector pin 211 is disposed in lower mold cavity through hole 205, and a constant pressure gap with a certain distance is formed between the outer wall of ejector pin 211 and the inner wall of lower mold cavity through hole 205; specifically, the constant pressure gap size ranges from (0,0.1 mm).

During specific operation, molten metal needs to flow into the lower die cavity from the top surface of the rotor core through the casting through holes, and at the beginning of operation, the molten metal can temporarily seal the plurality of casting through holes and the lower die cavity due to the fact that the molten metal completely covers the top surface of the rotor core. If a constant pressure gap is not arranged, air between the casting through hole and the lower die cavity cannot be discharged from other places, on one hand, due to the fact that air pressure is balanced, the flowing speed of the molten metal is slow, the temperature reduction speed of the molten metal is fast, the fluidity of the molten metal can be weakened, and the quality of a formed casting part is poor; on the other hand, air can only form bubbles in the molten metal on one of the casting through holes according to the instantaneous air pressure relationship to be discharged, so that the uncertainty of the flow of the molten metal is enhanced, and the production quality of each cast rotor is difficult to ensure when the molten metal is unstable during forming; meanwhile, the generation of bubbles deteriorates the molding quality of the molten metal, and also causes unevenness in the distribution of the molten metal in each casting through-hole, resulting in deterioration of the molding quality of the cast portion.

Therefore, the utility model discloses the structure corresponding to the second balancing piece in lower die cavity 204 of embodiment comprises lower die cavity through-hole 205 and thimble 211, has the constant voltage clearance between thimble 211 and the lower die cavity through-hole 205, and the effect in constant voltage clearance is used for at the operation initial stage, the air in discharge casting through-hole and the lower die cavity. In specific implementation, before the operation starts, the thimble 211 is not preheated, and the constant pressure gap is increased and the gas exhaust speed is increased due to the heating expansion of the lower die 201; when the molten metal flows into the lower mold cavity through hole 205, the molten metal contacts the ejector pin 211 and fills the constant-pressure gap; the metal liquid is cooled, the fluidity is weakened until the metal liquid is solidified, and the metal liquid is sealed in a constant-pressure gap which is filled with the metal liquid. Because the amount of gas in the lower die cavity 204 and the casting through holes is greatly reduced or completely exhausted at this stage, the quality of the finally formed cast part is better; because the size of the constant-pressure gap is small, the finally formed casting part only needs to be cleaned simply by waste materials on the surface of the second balance block, the required casting part can be obtained, and the operation is simple.

It should be noted that the axis of lower mold cavity inner projection 203, the axis of lower mold cavity outer projection 202 and central axis 90 are collinear, and the axis of thimble 211 is parallel to the central axis.

Fig. 6 shows the three-dimensional structure diagram of the upper die mechanism of the embodiment of the present invention, wherein, for the sake of clarity, the upper die mechanism structure is illustrated, and the partial structure of the upper die mechanism is cut open, wherein the black surface is a cutting surface. The utility model discloses upper die mechanism 30 includes initiative guide pillar 303, initiative drive plate 305, end cover mould 310, passive drive plate 302, surrounds mould 308, guide pillar mould 309 and passive guide pillar 307.

Specifically, in the embodiment of the present invention, the axes of the three active guide pillars 303 are parallel to the central axis, the lower ends of the three active guide pillars 303 are fixed on the tray 406 (see fig. 5), and the upper ends of the three active guide pillars 303 are connected and fixed with a guide pillar fixing member 301. The driving plates 305 are respectively matched on the three driving guide posts 303 in a sliding manner based on the driving sliding sleeves 306; an end cap mold 310 is fixed below the active drive plate 305, and the end cap mold 309 is coaxial with the central axis 90.

Specifically, in the embodiment of the present invention, the passive driving plate 302 is disposed above the active driving plate 305, and the surrounding mold 308 is disposed below the active driving plate 305; the passive post 307 axis is collinear with the central axis 90, and the passive post 307 is a sliding fit on the active drive plate 305; two ends of the passive guide pillar 307 are respectively connected and fixed with the passive driving plate 302 and the surrounding mold 308; specifically, the surrounding mold 308 is axially provided with a rotor core hole, and the rotor core hole is collinear with the central axis 90; the rotor core hole surrounding the die 308 is in slope transition with the top surface to form a funnel-shaped hole for pouring molten metal; the diameter of the rotor core hole line is matched with the outer diameter of the rotor core.

The guide post die 309 is coaxial with the central axis 90, and the guide post die 309 has an upper end fixed to the passive drive plate 302 and a lower end passing through the active drive plate 305 and slidably fitted in the end cap die 310. The guide pillar die 309 sequentially forms a shaft hole matching section 313, a step matching section 312 and an end cover matching section 311 with gradually increasing wire diameters from the lower end face. Specifically, shaft hole cooperation section 313 with rotor core's shaft hole cooperatees, step cooperation section 312 with rotor core's first step cooperatees, and end cover cooperation section 311 is used for the inside wall of the first end cover of shaping.

During specific operation, firstly, the driving plate 305 moves upwards along the direction of the central axis 90, the end cover mold 310 moves upwards synchronously, meanwhile, the driven driving plate 304 is driven by the driving plate 305 to move upwards synchronously, and correspondingly, the guide post mold 309 and the surrounding mold 308 connected with the driven driving plate 304 move upwards synchronously; after the rotor core is set on the lower mold mechanism, the driving plate 305 moves downward along the central axis direction.

In the descending process of the driving plate 305, the driven driving plate 304 synchronously moves downwards under the action of gravity, the guide post die 309 is firstly matched on the rotor core, the shaft hole matching section 313 of the guide post die 309 is matched on the shaft hole of the rotor core, and the step matching section 312 is matched on the first step of the rotor core to seal the first step; since the guide post mold 309 is fixedly connected with the driven driving plate 305, and the surrounding mold 308 is fixedly connected with the driven driving plate 305 based on the driven guide post 307, when the guide post mold 309 is fitted on the rotor core, the surrounding mold 308 is synchronously surrounded outside the rotor core; the lower portion of the rotor core bore surrounding the mold 308 fits outside the rotor core, and the upper portion of the rotor core bore combines with the bottom surface of the end cap mold 310 in a subsequent step to form an upper mold cavity.

After the guide post die 309 is matched on the rotor iron core, the driven driving plate 302, the guide post die 309, the driven guide post 307 and the surrounding die 308 stop moving at a limited position, and at the moment, a certain amount of molten metal can be added from the funnel-shaped orifice; then, the driving plate 305 continues to descend, and drives the end cover mold 310 to move downwards; the end cover die 310 moves downwards along the guide post die 309, enters from the funnel-shaped hole surrounding the die 308 and closes the rotor core hole, and the bottom surface of the end cover die 310, the inner wall surrounding the die 308 and the outer wall of the end cover matching section 311 form an upper die cavity together; at the moment, the upper die cavity, the casting through hole and the lower die cavity are communicated to form a complete die cavity together.

In the casting rotor forming process, the structure of the casting rotor die provided by the embodiment of the invention can be obtained, the surrounding die and the guide post die only receive the radial acting force of the molten metal, and the lower die is fixed, so that the lower die can also consider only receive the radial acting force of the molten metal (the axial acting force and the supporting force are offset), therefore, in the embodiment of the invention, the surrounding die, the guide post die and the lower die do not need to perform stress analysis in the axial direction, only positioning is accurate, and the realization process is simpler; the embodiment of the utility model provides an in, only the end cover mould receives the radial force of molten metal to it, consequently, among the concrete implementation, can consider to increase the weight of initiative drive plate or exert external force in order to guarantee that the end cover mould has certain pressure to the die cavity.

Fig. 7 shows a schematic three-dimensional structure diagram of the compression molding mechanism according to an embodiment of the present invention. The utility model discloses die pressing mechanism 50 includes moulding-die fixed guide pillar 501, moulding-die deflector 502, moulding-die drive board 504, moulding-die fixed plate 505, moulding-die drive pneumatic cylinder 506, moulding-die drive guide pillar 503 and moulding-die drive module.

In the embodiment of the present invention, the fixing shaft sleeve 410 is fixed on a bottom plate, and the bottom plate is connected and fixed with the tray 406. The lower end of the die fixing guide column 501 is fixed on the fixing shaft sleeve 410, and the die fixing plate 505 is fixed at the upper end of the die fixing guide column 501; the die guide plate 502 is fixed in the middle of the die fixing guide post 501; a die driving plate 504 is slidably fitted on the die fixing guide posts 501, and the die driving plate 504 is located between the die fixing plate 505 and the die guide plate 502.

The axis of a die driving hydraulic cylinder 506 is collinear with the central axis, the body of the die driving hydraulic cylinder 506 is fixed on a die fixing plate 505, and the output shaft of the die driving hydraulic cylinder 506 penetrates through the die fixing plate 505 and is fixedly connected with a die driving plate 504. The axis of the die driving guide post 503 is collinear with the central axis, the die driving guide post 503 is slidably fitted on the die guide plate 502, and both ends of the die driving guide post are respectively connected and fixed with the die driving plate 504 and the die driving module.

The die pressing driving module comprises an annular upper plate 508, an annular middle plate 509 and an annular lower plate 510 which are sequentially arranged from top to bottom and integrally connected, wherein the inner diameter of the annular middle plate 509 is smaller than that of the annular upper plate 508 and that of the annular lower plate 510. Specifically, the sizes of the annular upper plate 508, the annular middle plate 509 and the annular lower plate 510 are matched with the size of the driving plate 305, the inner diameters of the annular upper plate 508 and the annular lower plate 510 are smaller than the outer diameter of the driving plate 305, and the inner diameter of the annular middle plate 509 is larger than or equal to the outer diameter of the driving plate 305; the active drive plate 305 fits between an annular upper plate 508 and an annular lower plate 510. Through the arrangement mode, on one hand, the output end of the die driving hydraulic cylinder 506 is converted from surface output with a smaller action area to surface output with a larger action area of the die driving plate 504, and the pressure distribution is more balanced; the die driving plate 504 is in sliding fit with the die fixing guide posts 501, so that the movement direction of the die driving plate 504 is consistent with the direction of the central axis, the mounting precision of the die driving hydraulic cylinder 506 can be reduced, and the assembly efficiency of the rotor casting machine is improved; because the contact surface between the annular upper plate 508 and the driving plate 305 is an annular plane, the pressure applied by the compression molding mechanism to the driving plate is relatively even, and the moving direction and the moving stability of the driving plate 305 can be ensured.

In a specific implementation, the movement of the output shaft of the die driving hydraulic cylinder 506 is controlled, when the output shaft retracts, the die driving plate 504 is driven to move upwards, and synchronously, the die driving plate 504 drives the die driving module to move upwards based on the die driving guide pillar 503, so as to drive the driving plate 305 to move upwards; similarly, when the output shaft is extended, the drive plate 305 is driven downward.

Specifically, the purpose of automatically controlling the upper die mechanism can be realized by combining the operation principle of the upper die mechanism introduced above.

The utility model discloses rotor casting machine operation process as follows:

step S1: fig. 8 shows a schematic structural diagram of a rotor casting machine in step S1 according to an embodiment of the present invention, and for clarity of illustration, only some parts participating in the operation are retained in fig. 9, specifically, only one of the plurality of guides in the same position is retained for illustration, and the parts not shown in fig. 9 can be understood in combination with the above description, and will not be described repeatedly below. Step S1 is a rotor core feeding operation stage, specifically, the output shaft of the die driving hydraulic cylinder 506 is retracted to drive the die driving plate 504, the die driving guide post 503, and the die driving module to move to the upper side of the stroke; the annular upper plate 508, the annular middle plate 509 and the annular lower plate 510 of the die pressing driving module drive the driving plate 305 and the end cover die 310 to move to the upper part of the stroke; the active driving plate 305 drives the passive driving plate 302, the passive guide posts 307, the surrounding mold 308 and the guide post mold 309 to move to the upper part of the stroke. At this time, the upper die mechanism is completely separated from the lower die mechanism, and the operator sets the rotor core 10 on the lower die of the lower die mechanism 20;

step S2: fig. 9 shows a schematic structural diagram of a rotor casting machine in step S2 according to an embodiment of the present invention, and for clarity of illustration, only some parts participating in the operation are retained in fig. 10, specifically, only one of the plurality of guides in the same position is retained for illustration, and the parts not shown in fig. 10 can be understood in combination with the above description, and will not be described repeatedly below. Based on the same transfer sequence as step S1, the output shaft of the die drive cylinder 506 is extended, the active drive plate 305 is moved downward, and the passive drive plate, the passive guide posts, the surrounding mold 308, and the guide post mold 309 are moved downward by gravity until the guide post mold 309 is fitted on the guide post 10. Specifically, in conjunction with the rotor structure shown in fig. 1 and fig. 2, the shaft hole fitting section 313 and the step fitting section 312 are respectively fitted on the shaft hole 104 and the first step 111 of the rotor core 10; simultaneously, the surrounding mold 308 surrounds the outer wall of the rotor core 10. At this time, the surrounding mold 308, the guide post mold 309 and the lower mold are preheated, and then a fixed amount of molten metal is added from the funnel-shaped orifice.

Step S3: fig. 10 shows a schematic structural diagram of a rotor casting machine in step S3 according to an embodiment of the present invention, and for clarity of illustration, only some parts participating in the operation are retained in fig. 10, specifically, only one of the plurality of guides in the same position is retained for illustration, and the parts not shown in fig. 10 can be understood in combination with the above description, and will not be described repeatedly below. Based on the same transmission sequence as the steps S1 and S2, the output shaft of the die-driving hydraulic cylinder 506 continues to extend, and the driving plate 305 moves downward to drive the end cover mold 310 to move downward synchronously until the end cover mold 310 extends into the core hole of the rotor surrounding the mold 308; since the molten metal is injected, the end cover mold 310 cannot move continuously after moving for a certain stroke, and the output shaft pressure of the die-driven hydraulic cylinder 506 and the lower end of the end cover mold 310 are balanced in stress. At this time, an upper mold cavity is formed among the lower end surface of the end cover mold 310, the inner wall of the surrounding mold 308, and the end cover matching section 311, the lower mold cavity of the lower mold 201, the casting through hole in the rotor core 10, and the upper mold cavity together form a complete casting cavity, and the molten metal is molded into a casting part in the casting cavity.

The embodiment of the utility model provides a rotor casting machine, the lower die of the casting rotor machine discharges the air in the die cavity through the arrangement of constant pressure clearance, which is beneficial to improving the molding quality of the casting part; the lower die, the surrounding die, the guide column die, the end cover die and the rotor core are combined together to form a die cavity, and through the structural design of parts, only the axial stress of the end cover die is considered, so that the operation difficulty is low; the upper die mechanism is reasonably designed in structure, the driving of the surrounding die, the guide post die and the end cover die can be realized only by driving the driving plate through the die pressing mechanism, and the driving mode is simple; the driving force of the die pressing mechanism to the driving plate is distributed evenly, so that stable pressure is formed, stress of molten metal at each position is balanced when the molten metal is cooled, and forming quality of the casting part is improved. Based on the utility model provides a casting rotor of rotor casting machine production, the shaping of casting portion is of high quality, has good practicality in the in-service use.

The rotor casting robot provided by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained herein by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims (10)

1. The rotor casting machine is characterized by comprising a lower die mechanism, an upper die mechanism and a die pressing mechanism, wherein a central axis is arranged on the rotor casting machine, and the lower die mechanism is arranged below the upper die mechanism;

the lower die mechanism comprises a lower die, the lower die is provided with annular lower die cavity inner bulges and lower die cavity outer bulges, and the axes of the lower die cavity inner bulges, the lower die cavity outer bulges and the central axis are collinear;

the upper die mechanism comprises an active driving plate, an end cover die, a passive driving plate, a surrounding die, a guide post die and a passive guide post;

the drive plate moves along the central axis, the end cap mold is fixed below the drive plate and the axis of the end cap mold is collinear with the central axis;

the passive driving plate and the surrounding mould are respectively positioned above and below the active driving plate; the middle part of the guide post die is in sliding fit with the driving drive plate, and two ends of the guide post die are respectively connected and fixed with the driven drive plate and the surrounding die; the axis of the guide post die is collinear with the central axis, the guide post die penetrates through the driving plate and is in sliding fit with the end cover die, and the upper end of the guide post die is fixedly connected with the driven driving plate;

the surrounding mould is provided with a rotor core hole along the axial direction, and the outer diameter of the end cover mould is matched with the inner diameter of the rotor core hole;

the die pressing mechanism is provided with an output end which moves along the direction of the central axis, and the output end is connected with the driving plate.

2. The rotor caster of claim 1, wherein said lower die mechanism comprises a die drive hydraulic cylinder, a die guide plate, a die drive guide post and a die drive block;

the die driving hydraulic cylinder body is fixed, and the output end of the die driving hydraulic cylinder faces to the lower part of the central axis and is connected with the die driving plate; the die guide plate is positioned below the die driving plate and is relatively fixed with the die driving hydraulic cylinder body; the pressing die driving guide column is in sliding fit with the pressing die guide plate, and two ends of the pressing die driving guide column are respectively connected and fixed with the pressing die driving plate and the pressing die driving module;

and the pressing die driving module is fixedly connected with the driving plate.

3. The rotor caster of claim 2, wherein said rotor caster further comprises a base plate, said lower die mechanism further comprises die holding guide posts and die holding plates;

the two ends of the pressing die fixing guide column are respectively connected and fixed with the bottom plate and the pressing die fixing plate, the pressing die guide plate is fixed in the middle of the pressing die fixing guide column, and the pressing die driving plate is in sliding fit with the pressing die fixing guide column;

the driving hydraulic cylinder body is fixed on the die fixing plate, and the output end of the driving hydraulic cylinder penetrates through the die fixing plate to be fixedly connected with the die driving plate.

4. The rotor casting machine as claimed in claim 2 wherein the die drive module comprises an annular upper plate, an annular middle plate and an annular lower plate which are integrally connected and arranged in sequence from top to bottom;

the inner diameters of the annular upper plate and the annular lower plate are smaller than the outer diameter of the driving plate, and the inner diameter of the annular middle plate is larger than or equal to the outer diameter of the driving plate;

the drive plate fits between the annular upper plate and the annular lower plate.

5. The rotor caster of claim 1, wherein said lower die mechanism further comprises a thimble, said lower die having a lower die cavity through-hole between said lower die cavity inner projection and said lower die cavity outer projection, said thimble being disposed in said lower die cavity through-hole.

6. The rotor casting machine as claimed in claim 5, wherein a constant pressure gap is provided between the outer wall of the thimble and the inner wall of the through hole of the lower die cavity, and the size range of the constant pressure gap is (0,0.1 mm).

7. The rotor casting machine according to claim 1, wherein the column guide mold is provided with a shaft hole fitting section, a step fitting section and an end cover fitting section, which have gradually increasing wire diameters, in this order from the lower end surface.

8. The rotor caster of claim 1, wherein said surrounding mold bottom surface plane passes through said end cap mating segment.

9. The rotor caster of claim 1, wherein said surrounding mold top surface transitions with said rotor core bore based on a ramp, said ramp forming a funnel-shaped opening.

10. The rotor caster of claim 1, wherein said rotor caster further comprises a tray, said lower die mechanism being fixed to said tray;

the upper die mechanism further comprises a driving guide pillar, the lower end of the driving guide pillar is fixed on the tray, and the axis of the driving guide pillar is parallel to the central axis;

the driving plate is in sliding fit with the driving guide post.

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