CN115673285A - Die-casting molding die for aviation special motor housing and using method thereof - Google Patents

Abstract

The invention discloses a die-casting forming die of an aviation special motor shell and a using method thereof, belonging to the technical field of mechanical casting forming and comprising a top seat and a base; a die groove is formed in the end face, opposite to the base, of the top seat; a central through hole is formed at the bottom of the die groove; a central core is arranged at the central through hole; the base is provided with a blind hole; a central feeding pipeline is arranged at the central core, and a feeding gap is reserved between the central core and the central through hole; a plurality of groups of heat dissipation rib molds are detachably arranged in the mold grooves; the shape of the radiating rib mold corresponds to the shape of the motor shell to be molded; the invention effectively solves the problems that the density is insufficient due to internal organization in the process of die-casting the aviation motor shell, and a die cavity of the die is easy to damage and is not easy to repair and replace.

Description

Die-casting molding die for aviation special motor housing and using method thereof

technical field

The invention relates to the technical field of mechanical casting and molding, in particular to a die-casting molding mold for an aviation special motor casing and a method for using the same.

Background technique

The motor shell is generally required to have a good heat dissipation structure and connection reliability. When casting the aviation motor in Figure 1, since the material of the part is cast aluminum alloy and the batch is large, the die casting method is used; the general die casting Most of the methods are to fill the mold with liquid from the edge. In this process, the place where the cylinder body and the heat dissipation rib are far away is prone to loose tissue, or even no shape; so how to improve the die-casting mold to ensure the forming of the heat dissipation rib of the part The density of the internal structure is consistent during the process, and at the same time, it solves the problem that the mold cavity is easily damaged and difficult to repair and replace.

Contents of the invention

The technical problem to be solved by the present invention is: to provide a die-casting molding mold for aviation special motor shells, so as to solve the insufficient density of the internal structure in the current process of die-casting aviation motor shells, and the mold cavity is easily damaged and difficult to repair and replace The problem.

In order to solve the above problems, the present invention provides the following technical solutions:

A die-casting mold for an aviation special motor housing; it includes a top seat and a base; a mold groove is opened on the end face of the top seat facing the base; a central through hole is opened at the bottom of the mold groove; A central core is installed at the center; a blind hole matched with the end of the central core is provided on the base; a central feeding pipe is provided at the central core, and an inlet is left between the central core and the central through hole. material gap; casting raw materials enter through the central feed channel and the feed gap; several groups of heat dissipation rib molds are detachably installed in the mold groove; the shape of the heat dissipation rib mold corresponds to the shape of the motor housing to be formed; The rib mold is provided with an overflow ring groove and an exhaust channel.

Preferably, a protective ring is detachably installed between the central hole and the central core; the mold groove, the central hole and the protective ring are all arranged coaxially.

Preferably, the central core is a cylindrical mechanism; the end of the central core is a tapered structure matching the blind hole on the base; the shape and size of the columnar end match the inner diameter of the motor housing to be formed.

Preferably, the central feed pipe is a two-section reducing pipe structure with a small top and a large bottom, and the bottom of which is detachably placed at the position of the central core.

Preferably, there are 6 groups of heat dissipation rib molds, each group of heat dissipation rib molds has the same structure and size, and the contour shape of the heat dissipation rib mold towards the center core side is the same as the shape of the heat dissipation ribs outside the motor housing to be formed; The mold includes a positioning clip, an upper split clip and a lower split clip; both the positioning clip and the lower split clip are placed at the bottom of the mold groove for setting, and a clip plate is fixed on the mold groove, and the lower split The body clamp is installed through the clamp plate; a horizontal step is arranged on one side end surface of the positioning clamp; the upper split clamp is installed through the step, and the upper split clamp and the lower split clamp are arranged oppositely.

Further, mold base separation holes of the same size are opened on the mold groove and the positioning clip.

Further, the back of the positioning clip is an I-shaped arc-shaped plate structure, and a guide groove matching the arc-shaped plate is provided on the mold groove.

Preferably, the overflow ring groove is an annular groove structure formed by splicing the positioning clips and the end faces of the upper split clips arranged on the molds of each group of cooling ribs, and the exhaust channels are arranged radially outside the overflow ring groove; The inner side of the overflow ring groove is also provided with a drainage groove facing the central core.

Preferably, parting holes are also provided on the top seat and the base.

The invention also discloses a method for using a die-casting mold for an aviation special motor housing, which includes the following steps:

S1. Lay the top seat flat, and put the central core with the protective ring and each group of heat dissipation rib molds into the mold grooves on the top seat from top to bottom;

S2. Cover the base on the top base; insert the central core into the blind hole;

S3, turn over the top seat and the base, so that the back of the base is set downward;

S4. Take off the protective ring and install the central feed pipe to the position of the central core;

S5. Pour the pouring material from the upper part of the central feed pipe under pressure, and wait for the motor shell to be formed;

S6. Separate the two through the parting holes on the top base and the base, and then separate the mold groove and the heat dissipation rib mold through the separation holes of the mold base to complete a die-casting operation.

Beneficial effects of the present invention:

The present invention provides a production mold based on central feeding, and by setting an annular overflow groove at the far end of the pouring, and setting an exhaust channel, it is possible to effectively solve the problem of easy tissue loosening and even Unformed problem. In addition, the mold cavity structure design of the heat dissipation rib of the die-casting mold is improved to meet the needs of easy processing and easy repair and replacement. It effectively solves the problems of poor forming of holes and ribs, loose internal structure of parts and other defects.

Description of drawings

Fig. 1 is the schematic structural view of the aviation special motor housing to be die-cast in the present embodiment;

Fig. 2 is the structural representation of die-casting mold in the present embodiment;

Fig. 3 is the front structure schematic diagram of top seat in the present embodiment;

Fig. 4 is a schematic diagram of the back structure of the top seat in the present embodiment;

Fig. 5 is a schematic view of the structure when a single group of heat dissipation rib molds is installed in the mold groove of the top seat in this embodiment

Fig. 6 is a schematic diagram of the structure after removing the positioning clip and the upper split clip in Fig. 5;

Fig. 7 is a schematic diagram of cooperation between the positioning clip and the upper split clip in this embodiment;

Fig. 8 is a schematic structural view of the positioning clip in this embodiment;

Fig. 9 is a schematic view of the structure when the center feed pipe is installed on the center core of the top seat;

Fig. 10 is a schematic diagram of a motor housing blank that is expected to be poured and formed using the mold in this embodiment;

Explanation of reference signs: 1, top seat, 1A, central through hole, 1B, mold groove, positioning through hole, 2, base, 3, central core, 4, central feeding pipe, 5, cooling rib mold, 5A, Overflow ring groove, 5B, exhaust duct, 5C, positioning clamp, 5D, upper split clamp, 5E lower split clamp, 6, protective ring sleeve.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is further introduced:

Example:

With reference to Fig. 1, present embodiment provides a kind of die-casting mold of aviation special motor housing; It comprises top seat 1 and base 2; On the end face of top seat 1 facing base 2, mold groove 1B is opened; The groove bottom of 1B has a central through hole 1A; a central core 3 is installed at the central through hole 1A; a blind hole matching the end of the central core 3 is provided on the base 2; A central feeding pipe 4 is provided, and a feeding gap is left between the central core 3 and the central through hole 1A; casting raw materials enter through the central feeding channel and the feeding gap; detachably installed in the mold groove 1B Several groups of heat dissipation rib molds 5; the shape of the heat dissipation rib mold 5 corresponds to the shape of the motor housing to be formed; an overflow ring groove 5A and an exhaust channel 5B are arranged on the heat dissipation rib mold 5.

Between the central hole 1A and the central core 3, a protective ring 6 is detachably installed; the mold groove 1B, the central hole 1A and the protective ring 4 are coaxially arranged.

The central core 3 is a cylindrical mechanism; the end of the central core 3 is a tapered structure matching the blind hole on the base 2; the shape of the columnar end matches the inner diameter of the motor housing to be formed.

The central feed pipe 4 is a two-section reducer pipe structure with a small top and a large bottom, and the bottom is detachably placed at the position of the central core 3 .

Radiating rib mold 5 is provided with 6 groups altogether, and the structural size of each group of cooling rib mold 5 is the same, and the outline shape of cooling rib mold 5 toward the center core 3 side is identical with the shape of the cooling rib outside the motor housing to be formed; The rib mold 5 includes a positioning clamp 5C, an upper split clamp 5D and a lower split clamp 5E; both the positioning clamp 5C and the lower split clamp 5E are placed at the bottom of the mold groove 1B for setting, and are placed in the mold groove 1B Also fixed on the clamp 6, the lower split clamp 5E is installed through the clamp; a horizontal step is arranged on a side end surface of the positioning clamp 5C; the upper split clamp 5D is installed through the step, and the upper split The body clip 5D and the lower split body clip 5E are arranged oppositely.

Die base separation holes of the same size are provided on the mold groove 1B and the positioning clip 5C.

The back of the positioning clip 5C is an I-shaped arc-shaped plate structure, and a guide groove matching the arc-shaped plate is provided on the mold groove 1B.

The overflow ring groove 5A is an annular groove structure formed by splicing the end faces of the positioning clip 5C and the upper split clip 5D arranged on the heat dissipation rib mold 5 of each group, and the exhaust channel 5B is arranged on the outside of the overflow ring groove 5A in a radial shape Arrangement: There is also a drainage groove facing the central core 3 inside the overflow ring groove 5A.

Parting holes are also arranged on the top seat 1 and the base 2 .

It should be noted that in this embodiment, after the mold is manufactured according to the above-mentioned structural standards, and the size of the cavity is finalized, the surface of the mold cavity is subjected to nitriding treatment.

The invention also discloses a method for using a die-casting mold for an aviation special motor housing, which includes the following steps:

S1. Lay the top seat 1 flat, and put the central core 3 with the protective ring 6 and each group of cooling rib molds 5 into the mold groove 1B on the top seat 1 successively from top to bottom;

S2. Cover the base 2 on the top base 1; insert the central core 3 into the blind hole;

S3, turn over the top seat 1 and the base 2, so that the back of the base 2 is set downward;

S4. Take off the protective ring sleeve 6, and install the central feed pipe 4 to the position of the central core 3;

S5. Pour the pouring material from the upper part of the central feed pipe 4 under pressure, and wait for the motor shell to be formed;

S6. Separate the top base 1 and the base 2 through the mold splitting hole, and then separate the mold groove 1B and the heat dissipation rib mold 5 through the mold base separation hole to complete a die-casting operation.

Claims (10)

1. A die-casting mold for aviation special motor housing, characterized in that it includes a top seat (1) and a base (2); a mold is opened on the end face of the top seat (1) facing the base (2) groove (1B); a central through hole (1A) is opened at the bottom of the mold groove (1B); a central core (3) is installed at the central through hole (1A); A blind hole matched to the end of the core (3); a central feed pipe (4) is provided at the central core (3), and a gap is left between the central core (3) and the central through hole (1A). There is a feeding gap; the casting raw materials enter through the central feeding channel and the feeding gap; several groups of heat dissipation rib molds (5) are detachably installed in the mold groove (1B); the shape of the heat dissipation rib mold (5) is consistent with the shape to be formed The shape of the motor housing is corresponding; an overflow ring groove (5A) and an exhaust channel (5B) are arranged on the cooling rib mold (5). 2. A die-casting mold for aviation special motor housing according to claim 1, characterized in that a protective ring is detachably installed between the central hole (1A) and the central core (3) (6); the mold groove (1B), the central hole (1A) and the protective ring sleeve (4) are all arranged coaxially. 3. A die-casting mold for aviation special motor housing according to claim 1, characterized in that: the central core (3) is a cylindrical mechanism; the end of the central core (3) is connected to the base (2) A tapered structure matching the upper blind hole; the shape and size of the columnar end match the inner diameter of the motor housing to be formed. 4. A die-casting mold for aviation special motor housing according to claim 1, characterized in that: the central feed pipe (4) is a two-section variable-diameter pipe structure with a small top and a large bottom, and its The bottom is detachably placed in place of the central core (3). 5. A die-casting molding mold for aviation special motor housing according to claim 1, characterized in that there are 6 groups of cooling rib molds (5) in total, and the structural size of each group of cooling rib molds (5) is the same , the contour shape of the heat dissipation rib mold (5) facing the center core (3) is the same as the shape of the heat dissipation rib outside the motor housing to be formed; the heat dissipation rib mold (5) includes a positioning clamp (5C), an upper split The clamp (5D) and the lower split clamp (5E); the positioning clamp (5C) and the lower split clamp (5E) are placed at the bottom of the mold groove (1B) for setting, and in the mold groove (1B) A clamping plate (6) is also fixed on the top, and the lower split clamp (5E) is installed through the clamp; a horizontal step is provided on one side end surface of the positioning clamp (5C); the upper split clamp (5D) The installation is performed through the steps, and the upper split body clamp (5D) and the lower split body clamp (5E) are arranged oppositely. 6. A die-casting mold for aviation special motor housing according to claim 5, characterized in that: there are mold seat separation holes of the same size on the mold groove (1B) and the positioning clip (5C) . 7. A die-casting mold for aviation special motor housing according to claim 5, characterized in that: the back of the positioning clip (5C) is an I-shaped arc-shaped plate structure, and the mold groove (1B) A guide groove matching the arc-shaped plate is arranged on the top. 8. A die-casting mold for aviation special motor housing according to claim 1, characterized in that: the overflow ring groove (5A) is a positioning clip (5C) provided on each group of cooling rib molds (5) ) and the end face of the upper split clamp (5D) are spliced into an annular groove structure. The exhaust channel (5B) is arranged radially outside the overflow annular groove (5A); on the inner side of the overflow annular groove (5A) A drainage groove facing the central core (3) is also provided. 9. A die-casting mold for aviation special motor housing according to claim 1, characterized in that: there are also mold splitting holes on the top seat (1) and the base (2). 10. A method for using a die-casting mold for an aviation special motor housing according to any one of claims 1 to 9, characterized in that it includes the following steps: S1. Lay the top seat (1) flat, put the central core (3) with the protective ring (6) and each group of heat dissipation rib molds (5) into the mold on the top seat (1) successively from top to bottom in slot (1B); S2. Cover the base (2) on the top base (1); insert the central core (3) into the blind hole; S3. Turn over the top seat (1) and the base (2), so that the back of the base (2) is set downward; S4. Remove the protective ring (6), and install the central feed pipe (4) to the position of the central core (3); S5. Pour the pouring material from the upper part of the central feed pipe (4) under pressure, and wait for the motor shell to be formed; S6. Separate the top base (1) and the base (2) through the parting holes on the two, and then separate the mold groove (1B) and the heat dissipation rib mold (5) through the mold base separation hole to complete a die-casting operate.

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