CN113000785A

CN113000785A - Manufacturing method of oversized wax mold

Info

Publication number: CN113000785A
Application number: CN202110218807.2A
Authority: CN
Inventors: 戴勇; 杜应流; 施长坤; 陶元亮; 夏厚明
Original assignee: Anhui Yingliu Hangyuan Power Technology Co Ltd
Current assignee: Anhui Yingliu Hangyuan Power Technology Co Ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-06-22

Abstract

The invention discloses a method for manufacturing an oversized wax mold, which comprises the following steps: s1, wax mold halving: equally dividing the wax pattern according to the integral structure of the wax pattern to ensure that the structural shape of each part of the wax pattern is consistent, and manufacturing a single wax pattern; s2, correcting the wax pattern: placing the manufactured single wax mould into a correction mould, and precisely correcting the single wax mould; s3, assembling a wax mold: placing the corrected single wax mould into the assembling tool closely and pressing and fixing the wax mould; s4, repairing a wax mould: bonding and repairing the gaps between the adjacent single wax moulds, and taking down the whole wax mould after the bonding gaps are shaped to obtain the oversized wax mould with the required size requirement; the preparation method can adopt conventional molding equipment to produce any wax mould with an oversized size, and meanwhile, the size of the wax mould can be flexibly adjusted through the assembling and splicing tool, the size of the wax mould is ensured by the tool, the precision is high, the consistency is good, the production cost is reduced, and the market competitiveness is greatly improved.

Description

Manufacturing method of oversized wax mold

Technical Field

The invention relates to the technical field of investment casting, in particular to a method for manufacturing an oversized wax mold.

Background

In recent years, with rapid development in the fields of aviation, aerospace and the like, the requirement on the dimensional accuracy of a plurality of large parts is higher and higher, particularly parts such as a case and a bearing seat are required to meet the requirement on the dimensional accuracy only by adopting precision investment casting, but the size of the parts far exceeds the limit of conventional precision investment casting molding equipment, the outline size is large, the difficulty in overall pattern punching of a wax mold is very large, the surface quality is difficult to guarantee, the existing precision investment casting wax mold is integrally pressed and limited by the size of the equipment and the flowability of wax materials, the wax mold exceeding the size of the limit range of the equipment cannot be pressed, the size adjustment cannot be achieved only by repairing the mold when the mold is placed in a shrinkage mode, and the efficiency is low.

Disclosure of Invention

The invention mainly aims to provide a manufacturing method of an oversized wax mold, wherein the overall structure of the oversized wax mold is manufactured in a split manner, a plurality of blocks are pressed, and a single wax mold is shaped and then split, dripped and bonded by a split tool to form a qualified wax mold meeting the size requirement; the invention can be used for manufacturing wax moulds with any size requirement, and meanwhile, the moulds shrink unevenly without mould repair, and the wax moulds with required size can be obtained by adjusting the movable blocks of the tooling in the process of assembling the wax blocks, so that the invention is suitable for manufacturing moulds of large high-precision parts, has high tooling precision and good wax mould size, overcomes the short wax mould plate, improves the market competitiveness and can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that: a method for manufacturing an oversized wax mold comprises the following steps:

s1, wax mold halving: equally dividing the wax pattern according to the integral structure of the wax pattern to ensure that the structural shape of each part of the wax pattern is consistent, and manufacturing a single wax pattern;

s2, correcting the wax pattern: placing the manufactured single wax mould into a correction mould, and precisely correcting the single wax mould;

s3, assembling a wax mold: placing the corrected single wax mould into the assembling tool closely and pressing and fixing the wax mould;

s4, repairing a wax mould: and bonding and repairing the gaps between the adjacent single wax moulds, and taking down the whole wax mould after the bonding gaps are shaped to obtain the oversized wax mould with the required size requirement.

Preferably, the whole structure of the wax mould is an oversized annular wax mould structure.

Preferably, in the wax mould correction, a correction mould is manufactured according to the shape of a single wax mould, the correction mould comprises a shaping bottom mould and a correction pressing mould, and the shaping bottom mould and the correction pressing mould are matched for use.

Preferably, the specific step of correcting the wax mould is to place a single wax mould into the shaping bottom mould, then correspondingly cover the correcting pressing mould on the shaping bottom mould, tightly press and tightly hold the mould for 4 to 8 hours, and then take out the mould to obtain the high-precision single wax mould.

Preferably, the assembling tool is manufactured according to the overall shape of the wax mould in the wax mould assembling process, the assembling tool comprises a base plate, an inner ring piece and an outer ring piece are mounted on the base plate, and the single wax mould is arranged between the inner ring piece and the outer ring piece.

Preferably, the inner ring piece and the outer ring piece are arranged in a matched mode, and the number of the inner ring piece and the number of the outer ring piece are consistent with the integral equal-division number of the wax mould.

Preferably, the upper end face of the base plate is provided with strip grooves distributed in an annular array, the number of the strip grooves is equal to the equal-division number of the wax patterns, and the upper end face of the supporting bar is fixedly connected with the inner ring piece.

Preferably, the middle part of the base plate is fixedly connected with a disc, and the upper end of the disc is fixedly connected with a handheld rod.

Compared with the prior art, the invention has the following beneficial effects: the invention separately manufactures the overall structure of the oversized wax mold, adopts a multi-block pressing mode, and forms a single wax mold, and then carries out assembling, glue dripping and bonding on the separated wax blocks through an assembling tool to form the qualified wax mold meeting the size requirement; the invention can be used for manufacturing wax moulds with any size requirement, and meanwhile, the moulds shrink unevenly without mould repair, and the wax moulds with required sizes can be obtained by adjusting the movable blocks of the tooling in the process of assembling and splicing the wax blocks.

The preparation method can adopt conventional molding equipment to produce any wax mould with an overlarge size, the size of the wax mould can be flexibly adjusted through the assembling and assembling tool, the size of the wax mould is ensured by the tool, the precision is high, the consistency is good, the production cost is reduced, and the market competitiveness is greatly improved!

Drawings

FIG. 1 is a schematic view of the overall structure of a wax pattern according to the present invention;

FIG. 2 is an isometric view of the overall construction of the wax pattern of the present invention;

FIG. 3 is a schematic view of a single block wax pattern of the present invention;

FIG. 4 is a schematic view of the corrective tire of the present invention;

FIG. 5 is a schematic view of the correction of the wax pattern by the correction clamping fixture of the present invention;

FIG. 6 is a schematic diagram of assembling a wax pattern by the assembling tool of the present invention;

fig. 7 is an internal schematic view of the wax mold assembling part of the assembling tool of the present invention.

In the figure: 1. the wax mould has an integral structure; 2. a single wax pattern; 3. shaping the bottom die; 4. correcting the pressing die; 5. a base plate; 6. a disc; 7. a hand-held wand; 8. a strip groove; 9. a supporting strip; 10. an inner ring member; 11. an outer ring member.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Example 1

A method for manufacturing an oversized wax mold comprises the following steps:

s1, wax mold halving: equally dividing the wax mould overall structure 1 to make the structure shape of each part of the wax mould consistent, and manufacturing a single wax mould 2;

s2, correcting the wax pattern: placing the manufactured single wax mould 2 into a correction mould, and precisely correcting the single wax mould 2;

s3, assembling a wax mold: placing the corrected single wax mould 2 into the assembling tool closely and pressing and fixing the wax mould;

Example 2

Taking the annular wax pattern integral structure 1 as shown in figure 1 as an example,

the overall structure 1 size of the wax pattern is 1259.35 × 1259.35 × 435mm, and belongs to an oversized annular wax pattern.

As shown in fig. 2-3, a plurality of single wax patterns 2 are equally divided according to the overall structure 1 of the wax pattern, the size of each wax pattern is ensured to be consistent in the embodiment of 8 blocks, the single wax patterns 2 are manufactured, and the correction clamping fixture is prepared according to the standard size of the single wax patterns 2, the correction clamping fixture comprises a shaping bottom die 3 for placing the single wax patterns 2 and a correction pressing die 4 for carrying out compact shaping on the wax patterns, and a cavity formed between the correction pressing die 4 and the shaping bottom die 3 is consistent with the standard size of the single wax patterns 2;

as shown in fig. 4-5, after the single wax mold 2 is prepared, the single wax mold 2 is placed on the shaping bottom die 3, the correcting die 4 is fixedly covered on the shaping bottom die 3, after the single wax mold 2 is tightly pressed and kept for 4-8 hours, the single wax mold 2 is taken out, each single wax mold 2 is corrected by adopting the process, and after the single wax mold 2 is corrected, the single wax mold 2 is carefully stored for standby;

as shown in fig. 6-7, a splicing tool is prepared according to the shape of the whole wax mold 1, the splicing tool comprises a base plate 5, a disk 6 is fixedly connected to the middle of the base plate 5, a hand-held rod 7 is fixedly connected to the upper end of the disk 6, the upper end surface of the base plate 5 is provided with strip grooves 8 distributed in an annular array, the number of the strip grooves 8 is equal to the number of the wax molds in equal parts, in this embodiment, the number of the strip grooves 8 is 8, symmetrical support bars 9 are fixedly connected to the inner side walls of each strip groove 8, the end parts of the support bars 9 are tightly attached to the disk 6, the upper end surfaces of the support bars 9 are fixedly connected to inner ring members 10, outer ring members 11 are installed at the positions of the upper end surface of the base plate 5 corresponding to the inner ring members 10, the inner ring members 10 and the outer ring members 11 are matched to fix the single wax mold 2 on the base plate 5, and the inner ring members 10 and the, the sizes of the inner ring piece 10 and the outer ring piece 11 are adjusted according to the wax mold integral structure 1, the strip grooves 8 are arranged for positioning the inner ring piece 10 and the outer ring piece 11, meanwhile, in order to limit and fix the outer ring piece 11, positioning grooves are formed in the outer side of the bottom of the outer ring piece 11, positioning blocks are inserted in the strip grooves 8 and are tightly inserted with the positioning grooves, the bottom surfaces of the single wax molds 2 are tightly attached to the base plate 5, the side walls of the adjacent single wax molds 2 are tightly attached to form the wax mold integral structure 1, the base plate 5 is tightly attached to the single wax molds 2 in a matched mode, and the shape of the upper end face of the base plate 5 is the same as that of the inner wall of the bottom of the wax mold integral structure 1.

And fixing the halved single wax die set synthesized wax die integral structure 1 on a base plate 5, bonding and repairing the gap between the adjacent single wax dies 2, and taking down the integral wax die after the bonding gap is shaped to obtain the oversized wax die with the required size requirement.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A manufacturing method of an oversized wax mold is characterized by comprising the following steps: the manufacturing method comprises the following steps:

2. The method of claim 1, wherein the method further comprises: the wax pattern overall structure is super large size ring-shaped wax pattern structure.

3. The method of claim 1, wherein the method further comprises: the mould is corrected according to monolithic wax matrix shape manufacturing correction mould in the wax matrix is corrected, correct the mould including design die block and correction moulding-die, the use is cooperateed with the correction moulding-die to the design die block.

4. The method of claim 3, wherein the method further comprises: the specific steps of the wax mold correction are that a single wax mold is placed in a shaping bottom die, then a correction pressing die is correspondingly covered on the shaping bottom die, and after the correction pressing die is tightly pressed, the correction pressing die is kept for 4-8 hours and taken out, and a high-precision single wax mold is obtained.

5. The method of claim 1, wherein the method further comprises: the assembling tool is manufactured according to the overall shape of the wax mould in the wax mould assembling process and comprises a base plate, an inner ring piece and an outer ring piece are installed on the base plate, and the single wax mould is arranged between the inner ring piece and the outer ring piece.

6. The method of claim 5, wherein the method further comprises: the inner ring piece and the outer ring piece are arranged in a matched mode, and the number of the inner ring piece and the number of the outer ring piece are consistent with the integral equal-division number of the wax mold.

7. The method of claim 6, wherein the method further comprises: the up end of bed plate is equipped with the slotted groove that the annular array distributes, the quantity and the wax matrix of slotted groove equant quantity are the same, the up end of bed plate is equipped with the slotted groove that the annular array distributes, the quantity and the wax matrix equant quantity of slotted groove are the same, the ring piece in the up end fixed connection of support bar.

8. The method of claim 5, wherein the method further comprises: the middle part of bed plate fixed connection disc, the upper end fixed connection of disc holds the pole.