CN218903523U

CN218903523U - Impeller investment casting wax module welding structure

Info

Publication number: CN218903523U
Application number: CN202223139325.7U
Authority: CN
Inventors: 王占伟
Original assignee: BAODING CANGLONG STAINLESS STEEL PRECISION CASTING CO LTD
Current assignee: BAODING CANGLONG STAINLESS STEEL PRECISION CASTING CO LTD
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-04-25
Anticipated expiration: 2032-11-23

Abstract

The utility model discloses an impeller investment casting wax die set welding structure which comprises a pouring system wax die and an impeller wax die vertically arranged at the lower side of the pouring system wax die, wherein the pouring system wax die comprises a pouring cup wax die, a vertical pouring wax die and an inner pouring wax die, the pouring cup wax die is in a conical table structure and is arranged in the middle of the top of the vertical pouring wax die, the inner pouring wax die is vertically connected in the middle of the bottom of the vertical pouring wax die, the inner pouring wax die is in a reverse conical table structure with the cross section area gradually decreasing from top to bottom, and the bottom end of the inner pouring wax die is provided with a connecting part connected with the impeller wax die. The impeller investment casting wax die set welding structure adopting the structure has the advantages of simple and reasonable structure, reduced defective rate and high product quality.

Description

Impeller investment casting wax module welding structure

Technical Field

The utility model relates to the technical field of investment casting, in particular to an impeller investment casting wax module welding structure.

Background

The investment casting is to wrap the surface of a wax mould with refractory materials, bake the wax mould at a high temperature to form a shell after wax is lost, and then pour the shell to obtain a precision casting. Investment casting is suitable for producing small parts with complex shapes and high precision requirements or difficult to process, and is widely applied to parts with high precision requirements such as aerospace, automobiles and the like. The edge or the blade tip of the wax mould manufactured by the conventional impeller investment casting wax mould welding structure has defects and surface slag holes.

Disclosure of Invention

The utility model aims to provide an impeller investment casting wax die set welding structure which is simple and reasonable in structure, reduces the defective rate and is high in product quality.

In order to achieve the above purpose, the utility model provides an impeller investment casting wax pattern welding structure, which comprises a pouring system wax pattern and an impeller wax pattern vertically arranged on the lower side of the pouring system wax pattern;

the pouring system wax mould comprises a pouring cup wax mould, a vertical pouring gate wax mould and an internal pouring gate wax mould, wherein the pouring cup wax mould is arranged in the middle of the top of the vertical pouring gate wax mould in a conical table structure, and the internal pouring gate wax mould is vertically connected in the middle of the bottom of the vertical pouring gate wax mould;

the inner pouring gate wax mould is of a reverse taper table structure with the cross section area gradually decreasing from top to bottom, and the bottom end of the inner pouring gate wax mould is provided with a connecting part connected with the impeller wax mould.

Preferably, the vertical pouring gate wax mould is of a cube structure, and edges and vertex angles of the cube structure are arc-shaped chamfer angles.

Preferably, the cross-sectional area of the top end of the ingate wax pattern and the cross-sectional area of the top end of the tundish wax pattern are smaller than the cross-sectional area of the cube structure.

Preferably, V-shaped grooves are formed in two sides of the middle of the connecting portion, and the bottoms of the grooves are arc transition structures.

Preferably, the pouring cup wax pattern and the sprue wax pattern are pressed into an integrated structure.

Preferably, the ingate wax pattern and the impeller wax pattern are pressed into an integral structure.

Therefore, the impeller investment casting wax die set welding structure adopting the structure has the advantages of simple and reasonable structure, reduced defective rate and high product quality.

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic illustration of an embodiment of an impeller investment casting wax die set weld construction of the present utility model;

FIG. 2 is an enlarged view of the impeller investment casting wax die set weld construction A of the present utility model.

Reference numerals:

1. pouring cup wax mould; 2. a vertical pouring gate wax pattern; 3. an inner pouring gate wax pattern; 4. a connection part; 5. a groove; 6. impeller wax mold.

Detailed Description

The technical scheme of the utility model is further described below through the attached drawings and the embodiments.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Examples

FIG. 1 is a schematic view of an embodiment of an impeller investment casting wax pattern welding structure of the present utility model, as shown, which provides an impeller investment casting wax pattern welding structure, comprising a casting system wax pattern and an impeller wax pattern 6 vertically disposed on the underside of the casting system wax pattern. The pouring system wax mould comprises a pouring cup wax mould 1, a vertical pouring gate wax mould 2 and an internal pouring gate wax mould 3, wherein the pouring cup wax mould 1 is arranged in the middle of the top of the vertical pouring gate wax mould 2 in a conical table structure, and the internal pouring gate wax mould 3 is vertically connected in the middle of the bottom of the vertical pouring gate wax mould 2. The conical table structure of the pouring cup wax mold 1 ensures that molten metal flows into the cross gate after reaching a proper pouring speed, is beneficial to pouring operation, ensures that the molten metal flows into each corner, and improves the qualification rate of products.

The vertical pouring gate wax mould 2 is of a cube structure, and the vertical pouring gate guides pouring liquid downwards from the pouring cup during pouring, and the cube structure provides enough pressure for the pouring liquid to enter the inner pouring gate and the impeller cavity, so that the pouring liquid can overcome various flow resistance under the action of gravity and can fill the cavity within a specified time. The casting liquid has strong impact on the straight bottom during casting, and generates vortex and turbulent flow areas, which often cause casting defects such as sand washing, slag holes, a large amount of oxide inclusions and the like. The edges and the vertex angles of the cube structure are arc-shaped chamfer angles, so that the flow condition of casting liquid can be improved, the highly turbulent flow area at the turning of the vertical pouring channel is shortened, the local resistance coefficient and the pressure head loss at the turning of the vertical pouring channel are reduced, the defects of sand washing, slag holes, a large number of oxide inclusions and the like of castings are reduced, and the defective rate is reduced.

FIG. 2 is an enlarged view of the welding structure A of the impeller investment casting wax die set of the present utility model, wherein the inner runner wax die 3 is of a reverse taper structure with the cross-sectional area gradually decreasing from top to bottom, and the inner runner wax die 3 guides the casting liquid, so that the casting liquid flows more stably and the casting liquid is poured more uniformly. The inner pouring gate is gradually narrowed, which is beneficial to reducing the entry of slag and sundries and reducing the slag content of products. The bottom of the ingate wax mould 3 is provided with a connecting part 4 connected with an impeller wax mould 6, both sides of the middle part of the connecting part 4 are provided with V-shaped grooves 5, so that castings and a die head are conveniently separated, the bottom of the grooves 5 is of an arc transition structure, a buffer effect is provided, and the gas in casting liquid is conveniently discharged.

The cross-sectional area of the top end of the ingate wax pattern 3 and the cross-sectional area of the top end of the pouring cup wax pattern 1 are smaller than the cross-sectional area of the cube structure. The large volume of the cube mechanism provides more casting liquid for the preheating mould, and can feed and transfer static pressure when the casting cools and contracts, so that the wax mould is prevented from deforming.

The pouring cup wax pattern 1 and the vertical pouring gate wax pattern 2 are pressed into an integral structure, the impeller wax pattern 6 and the internal pouring gate wax pattern 3 are pressed into an integral structure, during assembly welding, special heating tools are utilized to melt wax materials on the surfaces of the vertical pouring gate wax pattern 2 and the internal pouring gate wax pattern 3, and the melted part of the internal pouring gate wax pattern 3 is rapidly close to the melted part of the vertical pouring gate wax pattern 2, and is lightly extruded to be bonded together.

Therefore, the impeller investment casting wax die set welding structure adopting the structure is provided with the vertical runner wax die with the cube structure and the inner runner wax die with the inverted cone table structure, so that the defects of sand washing, slag holes, a large number of oxide inclusions and the like of castings are reduced, the defective rate is reduced, the entry of slag and sundries is reduced, the connection part with the V-shaped groove is convenient for the discharge of gas in casting liquid, the quality of products is improved, the separation of castings and die heads is also convenient, and the working difficulty is reduced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and although the present utility model has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the utility model can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the utility model.

Claims

1. An impeller investment casting wax die set welds structure which characterized in that: the casting system comprises a casting system wax pattern and an impeller wax pattern vertically arranged on the lower side of the casting system wax pattern;

2. The impeller investment casting wax die set welding structure of claim 1, further comprising: the vertical pouring gate wax mould is of a cube structure, and edges and vertex angles of the cube structure are arc-shaped chamfer angles.

3. The impeller investment casting wax die set welding structure of claim 2, further characterized in that: the cross-sectional area of the top end of the ingate wax pattern and the cross-sectional area of the top end of the pouring cup wax pattern are smaller than the cross-sectional area of the cube structure.

4. A vane investment casting wax pattern welding structure as defined in claim 3, wherein: v-shaped grooves are formed in two sides of the middle of the connecting portion, and the bottoms of the grooves are arc transition structures.

5. The impeller investment casting wax die set welding structure of claim 4, further comprising: and the pouring cup wax mould and the sprue wax mould are pressed into an integrated structure.

6. The impeller investment casting wax die set welding structure of claim 5, further comprising: and the inner pouring channel wax mould and the impeller wax mould are pressed into an integrated structure.