Die for impeller part production

Abstract

The utility model relates to the technical field of die-casting dies, and discloses a die for impeller part production, which comprises an upper fixing plate and a lower fixing plate, an upper die is arranged in the upper fixing plate, a lower die is arranged in the lower fixing plate, the upper die and the lower die are distributed oppositely, the upper die and the lower die are used for forming a die-casting cavity, and the die-casting cavity is used for forming a die-casting cavity. A feeding groove is formed in one side of the die-casting cavity and communicates with a fan blade area on one side of the multiple impellers in the die-casting cavity. A plurality of exhaust grooves are formed in the side, away from the feeding groove, of the die-casting cavity, the exhaust grooves are communicated with a fan blade area, away from the side of the feeding groove, in the die-casting cavity, the exhaust grooves are used for exhausting gas in the die-casting cavity, and the die-casting die has the advantage of being good in die-casting production and machining effect of impeller parts.

Description

TECHNICAL FIELD

[0001] The utility model relates to die casting die technical field, concretely relates to a die for impeller part production. BACKGROUND

[0002] Impeller refers to the disk equipped with moving blade, which is a component part of impulse steam turbine rotor, and can also refer to the general term of disk and rotating blade installed thereon. As a mechanical part that converts mechanical energy of prime mover into static pressure energy and kinetic energy of working fluid, impeller is widely used in mechanical equipment. For some equipment with high requirements for the structure of impeller, metal die casting is usually used for production and processing of impeller. In die casting production of impeller, the existing technology generally uses die casting machine to cooperate with die casting die for casting operation. The die casting machine completes opening and closing of the die and injection of metal melt. The metal melt is cooled and formed into a preset shape in the die, thereby completing the manufacturing of impeller.

[0003] For example, the patent document with publication number CN103521736A discloses an impeller die casting die, which is characterized by a combined push piece mechanism composed of eight swing blocks and one push tube. The mechanism is composed of rollers, connecting rods, tension springs, swing rods, hinge supports, push rods, push plate guide columns, swing handles, pin shafts, pre-reset rods, swing blocks, fixed die cavity plates, fixed die sleeve plates, fixed die seat plates, cores, gate sleeves, limit blocks, push tubes, wedge tightening cones, springs, support plates, movable die seat plates, push plates, push rod fixing plates, guide columns. The push tube with a hole is fixed on the push plate by the push rod fixing plate. The core is fixed on the support plate by the core. The swing blocks and swing handles connected by pins and screws are hinged to the support plate by the pin shaft. The two rollers at both ends of the connecting rod are hinged to the two rollers, and the middle part is hinged to one end of the swing rod by the pin shaft. The other end of the swing rod is hinged to the hinge support, and the middle part is elastically connected to the movable die seat plate by the tension spring, so that the two rollers on the connecting rod always adhere to the push plate. The casting profile is clear, the surface is smooth, the dimensions are consistent, and the precision is high.

[0004] Although the above technical solution can achieve clear and smooth impeller in die casting production, the shape of the die casting cavity in the impeller die casting die is complex due to the mechanical structure design requirements of the impeller. During the die casting process, air residues are easily left in the die casting cavity, which causes the metal melt to be unable to completely fill the die casting cavity under the action of air pressure, resulting in that the quality of the die cast impeller cannot meet the actual processing requirements. UTILITY MODEL CONTENTS

[0005] The utility model intends to provide a die for impeller part production to solve the technical problem that air residues are easily left in the die casting cavity in the prior art, which affects the impeller die casting processing effect.

[0006] To achieve the above object, the utility model discloses the following technical scheme: A mould for impeller part production, including upper fixed plate and lower fixed plate, the upper fixed plate is equipped with upper mould, the lower fixed plate is equipped with lower mould, the upper mould with The lower mould is distributed towards, the upper mould with The lower mould is used for forming die casting cavity, one side of the die casting cavity is equipped with feed slot, the feed slot with The die casting cavity in a plurality of impeller one side's fan blade area intercommunication, the die casting cavity is equipped with a plurality of exhaust groove away from the feed slot one side, the exhaust groove with The die casting cavity in the fan blade area intercommunication away from the feed slot one side, the exhaust groove is used for discharging the gas in the die casting cavity.

[0007] The principle and advantages of the present scheme: when the impeller is die casting production, the upper fixed plate and the lower fixed plate are closed, so that the upper mould and the lower mould between the upper fixed plate and the lower fixed plate can form a die casting cavity, the metal melt is injected into the die casting cavity, so that the metal melt is filled in the die casting cavity, wherein the metal melt pushes the air in the die casting cavity to be discharged through the exhaust groove during the filling process, so that the pressure in the die casting cavity can be balanced, and the filled metal melt is cooled and formed in the die casting cavity to form the impeller, and then the upper mould and the lower mould are opened for demolding.

[0008] In the present scheme, when the impeller is produced, the feed slot and the exhaust groove are arranged on both sides of the mould, the corresponding area of the impeller in the die casting cavity is communicated with the feed slot and the exhaust groove, the size of the communication channel of the die casting cavity circumferential of the impeller and the feed slot and the exhaust groove is improved, so that the metal melt can flow from one side of the die casting cavity to the other side of the die casting cavity during the die casting process, the sufficient filling of the metal melt in the die casting cavity is ensured, the existence of the cavity in the die casting cavity during the die casting process is avoided, the structural defects of the die casting production impeller are avoided, and the quality of the produced impeller is affected. And a plurality of exhaust grooves are arranged on the other side of the impeller, so that the gas in the die casting cavity can move to the exhaust groove direction under the push of the metal melt during the metal melt filling process, so that the one-way movement of the metal melt and the air is avoided, the residual air in the die casting cavity is avoided, the metal melt cannot be filled sufficiently, and the die casting effect of the impeller is affected.

[0009] Preferably, as an improvement, one side of the die casting cavity is provided with a feed pipe, one end of the feed pipe is communicated with the feed slot, and both ends of the feed slot extend outward along both sides of the feed pipe around the circumference of the die casting cavity. The metal melt can enter the die casting cavity uniformly through the plurality of fan blade areas, ensuring that one side of the die casting cavity can be uniformly filled and covered by the metal melt during the die casting process, avoiding the need for the metal melt to diffuse at a large angle after entering the die casting cavity, causing the input metal melt to be unable to meet the filling requirements of the die casting cavity after diffusion, causing air residues to easily appear above the die casting cavity after die casting, reducing the quality of the die casting production impeller.

[0010] Preferably, as an improvement, the feeding groove is provided with a feeding port between the feeding groove and the die casting cavity, the feeding port is used for connecting the die casting cavity and the feeding groove, and the feeding port extends to both sides of the fan area near the opening of one end of the die casting cavity. The molten metal can quickly spread to both sides after entering the die casting cavity through the feeding port, ensuring the uniformity of the filling of the molten metal in the die casting cavity and ensuring the die casting effect of the impeller.

[0011] Preferably, as an improvement, a plurality of waste grooves are provided between the die casting cavity and the exhaust groove, and the plurality of waste grooves correspond to the positions of the fan area on the side of the die casting cavity away from the feeding groove. The fan area not connected with the feeding groove can be connected with the exhaust groove through the waste groove, reducing the dead angle of air exhaust in the die casting cavity. The efficiency of air exhaust in the die casting cavity is improved.

[0012] Preferably, as an improvement, a plurality of exhaust grooves are provided at the end of the waste groove away from the die casting cavity, and the plurality of exhaust grooves are uniformly distributed on the side of the waste groove away from the die casting cavity. The plurality of exhaust grooves are connected on each waste groove, so that each fan area can be exhausted through the plurality of exhaust grooves at the same time, improving the smoothness of the die casting cavity during exhaust, avoiding poor exhaust of gas in the die casting cavity, and affecting the filling effect of the molten metal.

[0013] Preferably, as an improvement, the exhaust groove is connected with the top of the waste groove near the end of the waste groove, and the depth of the exhaust groove is less than the depth of the waste groove. The residue can be contained in the waste groove after falling into the residue outlet, avoiding the movement of the residue into the exhaust groove.

[0014] Preferably, as an improvement, a plurality of first ejection rods and a plurality of second ejection rods are arranged in the die casting cavity, the plurality of first ejection rods are uniformly distributed around the shaft of the impeller in the die casting cavity, the plurality of second ejection rods are arranged in correspondence with the positions of the fans in the die casting cavity, and the second ejection rods are located at the end of the fan area away from the shaft of the impeller. The shaft of the impeller and the fan are respectively lifted and unloaded by the first ejection rods and the second ejection rods, so that each area of the impeller can be uniformly stressed during unloading after die casting, avoiding uneven stress on the impeller during unloading, and causing damage to the impeller.

[0015] Preferably, as an improvement, a plurality of third ejection rods are further arranged in the feeding groove, and the plurality of third ejection rods are uniformly distributed in the feeding groove. The excess material in the feeding groove can be discharged in time, ensuring the cleanliness of the mold and facilitating subsequent die casting production and processing operation of the impeller. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic diagram of the rear end cover die casting mold in the embodiment of the utility model.

[0017] Figure 2 It is the upper fixed plate structure schematic view in the embodiment of the utility model.

[0018] Figure 3 It is the lower fixed plate structure schematic view in the embodiment of the utility model DETAILED DESCRIPTION

[0019] The following is further explained in detail by specific implementation:

[0020] The reference signs in the drawings of the specification include: upper fixed plate 1, upper die 101, upper fixed groove 102, lower fixed plate 2, lower die 201, exhaust groove 202, waste residue groove 203, connecting plate 3, lower fixed groove 301, connecting column 4, feeding pipe 5, feeding groove 501, first top feeding rod 6, second top feeding rod 7, third top feeding rod 8.

[0021] As shown in the accompanying Figure 1 and the accompanying Figure 2 As shown in the accompanying, a mold for impeller part production, including upper fixed plate and lower fixed plate, upper die is equipped in the upper fixed plate, lower die is equipped in the lower fixed plate, and die casting cavity for die casting processing is equipped between the upper die and the lower die.

[0022] The upper fixed plate and the lower fixed plate are stacked and distributed, wherein the upper die is embedded in the facing surface of the upper fixed plate and the lower fixed plate, and the upper die and the upper fixed plate are fixedly connected by bolts or welding; the lower die is embedded in the facing surface of the lower fixed plate and the upper fixed plate, and the positions of the upper die and the lower die correspond to each other, wherein the specific structure of the upper die and the lower die matches the shape of the end cover of die casting, and the specific content of the upper die and the lower die is prior art, which will not be described here.

[0023] The upper fixed plate is used for fixing the position of the upper die. Upper fixed grooves are opened on both sides of the upper fixed plate, and the upper fixed grooves are distributed in parallel on both sides of the upper fixed plate, and the upper fixed grooves penetrate the two sides of the upper fixed plate along the width direction perpendicular to the upper fixed plate, and the upper fixed grooves are used for clamping connection with external equipment. The connecting plate is provided on the side of the lower fixed plate away from the lower die, and the connecting plate and the lower fixed plate are fixedly connected by bolts, and the lower fixed groove is opened on the side surface of the connecting plate, and the lower fixed groove penetrates the two sides of the connecting plate along the height direction perpendicular to the connecting plate. Wherein the connecting plate is provided with two blocks, and the two connecting plates are distributed in parallel on both sides of the bottom of the lower fixed groove, and the lower fixed groove is on the opposite side of the connecting plate; the connecting plate is used for clamping connection with external equipment through the lower fixed groove.

[0024] A plurality of connecting columns are arranged between the upper fixing plate and the lower fixing plate, the plurality of connecting columns are uniformly distributed along the circumferential direction of the lower fixing plate on the facing surfaces of the upper fixing plate and the lower fixing plate, and the connecting columns are spaced apart between the upper fixing plate and the upper die. One end of the connecting column is connected with the upper fixing plate through snap fit, and the other end extends outward in the direction away from the upper fixing plate. A connecting hole is formed at the corresponding position of the lower fixing plate and each connecting column, and the connecting column can be arranged in the connecting hole. The upper fixing plate and the lower fixing plate are connected through the connecting column and the connecting hole. When the upper die and the lower die are connected or separated, they can be guided under the action of the connecting column, ensuring the accuracy of the connection between the upper die and the lower die.

[0025] A feeding pipe is arranged on one side of the lower die and the upper die, one end of the feeding pipe is communicated with the die casting cavity, the other end extends upward perpendicular to the plane where the lower die is located, and the end of the feeding pipe away from the lower die penetrates the upper fixing plate. The feeding pipe is used to transport metal melt raw materials into the die casting cavity.

[0026] As shown in the accompanying drawings, Figure 3 A feeding groove is formed between the feeding pipe and the die casting cavity, one side of the feeding groove is communicated with the feeding pipe, and both ends of the feeding groove extend outward along both sides of the feeding pipe around the circumferential direction of the die casting cavity. A plurality of feeding ports are formed on the side of the feeding groove away from the feeding pipe, and the plurality of feeding ports are distributed corresponding to the positions of the blades of the impeller, that is, one end of the feeding port is communicated with the feeding groove, and the other end is communicated with the edge of the corresponding position of the blade in the die casting cavity. The feeding port is used for feeding from the blade area in the die casting cavity. The metal melt can uniformly enter the die casting cavity through the plurality of blade areas, ensuring that one side of the die casting cavity can be uniformly filled and covered by the metal melt during the die casting process, avoiding the need for large-angle diffusion of the metal melt after entering the die casting cavity, preventing the input metal melt from failing to meet the filling demand of the die casting cavity after diffusion, preventing air from being easily left in the upper part of the die casting cavity, preventing voids from being easily formed after die casting, and improving the quality of the impeller produced by die casting.

[0027] The openings on both sides of the end of the feeding port close to the die casting cavity extend to both sides of the blade area. After the metal melt enters the die casting cavity through the feeding port, it can quickly diffuse to both sides, ensuring the uniformity of the filling of the metal melt in the die casting cavity and ensuring the die casting effect of the impeller.

[0028] A plurality of waste residue grooves are arranged on the side of the die casting cavity away from the feed groove, and the plurality of waste residue grooves correspond to the positions of the fan area on the side of the die casting cavity away from the feed groove, that is, the waste residue grooves are arranged on the side of the die casting cavity away from the feed groove. The end of the waste residue groove communicates with the fan area in the die casting cavity, and the waste residue groove extends to both sides of the fan near the opening of the end of the die casting cavity. When exhaust is performed through the exhaust groove, the residue in the die casting cavity moves in the direction of the exhaust groove under the action of the pressure, and falls into the waste residue groove, avoiding the residue entering the exhaust groove, preventing the exhaust groove from being blocked, ensuring the normal exhaust function of the exhaust groove, and ensuring the pressure balance during the die casting process. The exhaust function affects the die casting effect of the end cover.

[0029] A plurality of exhaust grooves are arranged on the end of the waste residue groove away from the die casting cavity, and the plurality of exhaust grooves are uniformly distributed on the circumference of the end of the waste residue groove away from the die casting cavity. One end of the exhaust groove communicates with the waste residue groove, and the other end extends to the edge of the lower mold. The exhaust groove is used for exhausting air in the die casting cavity. The plurality of exhaust grooves are arranged on each waste residue groove, so that each fan area can simultaneously exhaust through the plurality of exhaust grooves, improving the smoothness of the die casting cavity during exhaust, avoiding poor exhaust of gas in the die casting cavity, causing poor exhaust of gas in the die casting cavity, and affecting the filling effect of the metal melt.

[0030] The end of the exhaust groove near the waste residue groove communicates with the top of the waste residue groove, and the depth of the exhaust groove is less than the depth of the waste residue groove. After the residue falls into the residue storage port, it can be accommodated in the waste residue groove, avoiding the residue moving into the exhaust groove.

[0031] A plurality of first ejection rods 6 and a plurality of first ejection rods 7 are arranged in the die casting cavity. The plurality of first ejection rods 6 are uniformly distributed around the shaft of the impeller in the die casting cavity. The plurality of first ejection rods 7 are distributed corresponding to the positions of the vanes in the die casting cavity, and the first ejection rod 7 is located at the end of the vane away from the shaft of the impeller. One end of the first ejection rod 6 and the first ejection rod 7 penetrates the lower mold, and the other end of the first ejection rod 6 and the first ejection rod 7 extends outward away from the die casting cavity along a plane perpendicular to the lower mold. The first ejection rod 6 and the first ejection rod 7 can move along their extension direction, and the first ejection rod 6 and the first ejection rod 7 are used for unloading the impeller produced by die casting. The shaft and the vane of the impeller are respectively lifted by the first ejection rod 6 and the first ejection rod 7 for unloading, so that each area of the impeller can be uniformly stressed when the impeller after die casting is unloaded, avoiding uneven stress on the impeller during unloading, which causes damage to the impeller.

[0032] A plurality of third ejection rods are also arranged in the feed groove, the plurality of third ejection rods are uniformly distributed in the feed groove, the extension direction and the movement direction of the third ejection rod are consistent with the direction of the first ejection rod 6 or the first ejection rod 7, and the third ejection rod is used for ejecting the remaining material in the feed groove. The movement of the first ejection rod 6, the first ejection rod 7 and the third ejection rod can be pushed by a driving plate or the like pushing structure, and the specific content of driving the first ejection rod 6, the first ejection rod 7 and the third ejection rod by the power structure is a prior art, which will not be described here. The remaining material in the feed groove is ejected by the third ejection rod, so that the remaining material in the feed groove can be discharged in time, the cleanliness of the mold is ensured, and the subsequent impeller die casting production and processing operation is facilitated.

[0033] The specific implementation process is as follows:

[0034] In the die casting production of the impeller, the upper fixed plate and the lower fixed plate are closed, so that the upper mold and the lower mold between the upper fixed plate and the lower fixed plate can form a die casting cavity, the metal melt is injected into the die casting cavity, so that the metal melt fills the die casting cavity, wherein the metal melt pushes the air in the die casting cavity to be discharged through the exhaust groove during the filling process, so that the pressure in the die casting cavity can be balanced, and the filled metal melt is cooled and formed in the die casting cavity to form the impeller, and then the upper mold and the lower mold are opened for demolding.

[0035] Compared with the prior art, in the present application, when the impeller is produced, the feed groove and the exhaust groove are arranged on both sides of the mold, the corresponding area of the impeller in the die casting cavity is communicated with the feed groove and the exhaust groove, the size of the communication channel between the die casting cavity of the impeller and the feed groove and the exhaust groove is increased, so that during the die casting process, the metal melt can flow from one side of the die casting cavity to the other side of the die casting cavity, ensuring that the metal melt is fully filled in the die casting cavity, avoiding the existence of cavity in the die casting cavity during the die casting process, causing structural defects of the die casting produced impeller, and affecting the quality of the produced impeller. And a plurality of exhaust grooves are arranged on the other side of the impeller, so that during the filling process of the metal melt, the gas in the die casting cavity can move to the exhaust groove direction under the pushing of the metal melt, so that the metal melt and the air move directionally, avoiding the existence of air residue in the die casting cavity, causing the metal melt to be unable to be fully filled, and affecting the die casting effect of the impeller.

[0036] It should be noted that for those skilled in the art, without departing from the technical scheme of the present application, a number of deformations and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A mold for producing an impeller part, comprising an upper fixed plate and a lower fixed plate, an upper mold is arranged in the upper fixed plate, a lower mold is arranged in the lower fixed plate, the upper mold and the lower mold are oppositely distributed, and the upper mold and the lower mold are used for composing a die casting cavity, characterized in that: The side of the die casting cavity is provided with a feeding groove, which is communicated with the blade area on one side of the plurality of impellers in the die casting cavity; a plurality of exhaust grooves are arranged on the side of the die casting cavity away from the feeding groove, which are communicated with the blade area on the side of the die casting cavity away from the feeding groove, and the exhaust grooves are used for discharging the gas in the die casting cavity.

2. A mold for producing an impeller part according to claim 1, characterized in that: The side of the die casting cavity is provided with a feeding groove, which is communicated with the blade area on one side of the plurality of impellers in the die casting cavity; a plurality of exhaust grooves are arranged on the side of the die casting cavity away from the feeding groove, which are communicated with the blade area on the side of the die casting cavity away from the feeding groove, and the exhaust grooves are used for discharging the gas in the die casting cavity.

3. A mold for producing an impeller part according to claim 2, characterized in that: The feeding groove and the die casting cavity are provided with a feeding port for communicating the die casting cavity and the feeding groove, and the feeding port extends to both sides of the blade area near the opening of one end of the die casting cavity.

4. The mold for producing an impeller part according to claim 1, characterized in that: The die casting cavity and the exhaust groove are provided with a plurality of waste channels corresponding to the positions of the blade area on the side of the die casting cavity away from the feeding groove.

5. A mold for producing an impeller part according to claim 4, characterized in that: The waste channel is provided with a plurality of exhaust grooves on the end away from the die casting cavity, and the plurality of exhaust grooves are uniformly distributed on the circumference of the end of the waste channel away from the die casting cavity.

6. A mold for producing an impeller part according to claim 5, characterized in that: The exhaust groove is communicated with the top of the waste channel near the end of the waste channel, and the depth of the exhaust groove is less than the depth of the waste channel.

7. The mold for producing an impeller part according to claim 1, characterized in that: The die casting cavity is provided with a plurality of first lifting rods and a plurality of second lifting rods, the plurality of first lifting rods are uniformly distributed around the shaft of the impeller in the die casting cavity, the plurality of second lifting rods are distributed corresponding to the positions of the blades in the die casting cavity, and the second lifting rod is located at the end of the blade area away from the shaft of the impeller.

8. A mold for producing an impeller part according to claim 7, characterized in that: The feeding groove is also provided with a plurality of third lifting rods, and the plurality of third lifting rods are uniformly distributed in the feeding groove.

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