CN203804154U - Columnar combined sand core - Google Patents

Abstract

The utility model relates to a columnar combined sand core which mainly consists of an upper fixing piece, a first core box, a second core box and a lower fixing piece, wherein the first core box and the second core box consist of two semicircular columns; two ends of the core boxes are of symmetric convex structures; the first core box and the second core box are buckled with each other to form a columnar core chamber; the upper fixing piece is arranged outside the end surface convex part of the first core box and the second core box and is used for fixing the first core box and the second core box; the lower fixing piece is arranged outside another end surface convex part of the first core box and the second core box and has the same function as that of the upper fixing piece; the upper fixing piece and the lower fixing piece are both of plate-shaped ring structures. As the sand core boxes adopted in the columnar combined sand core provided by the utility model is in a detachable mode, the quality of a cast piece is greatly improved and the sand core is long-lasting and durable and is especially applicable to requirements on on-scale production.

Description

A kind of cylindrical combination core

Technical field

The utility model belongs to dynamo-electric manufacture field, particularly a kind of cylindrical combination core.

Background technology

In castings production process, the Core Box of some core is integral inseparable form, when completing, foundry goods just relates to dismounting core problem, in prior art, while machining, foundry goods is to one end, to allow its free dropping, long-term use, when running into the core that has when inner fluted, foundry goods and core cannot depart from, at this moment need under the effect of external force, the foundry goods of making could have been dismantled, so also likely the foundry goods of making is caused to damage, when making foundry goods with this core, naturally can cause casting defect, and then affect product quality.

Utility model content

The purpose of this utility model is to provide a kind of new cylindrical core, the problem that when changing traditional core and completing, foundry goods is difficult to dismounting.

A cylindrical combination core, is mainly comprised of upper fixing element, core box one, core box two, lower fixture.This core box one, core box two are comprised of two semicircle arc columns, and two ends become symmetrical convex shape structure; Core box one snaps together and forms cylindrical core chamber with core box two-phase, and it is outside with core box 21 end face projections that upper fixing element is arranged on core box one, for fixedly core box one and core box two; It is outside with core box two other end projections that lower fixture is arranged on core box one, acts on suitable with upper fixing element; Fixed part and lower fixture are tabular circular ring structure.

The core box that the cylindrical combination core of the utility model adopts becomes detachable form, and casting quality is greatly improved, durable in use, is applicable to very much the needs of batch production.

Accompanying drawing explanation

Fig. 1 is the perspective view of the cylindrical combination core of the utility model;

Fig. 2 is the front view of the cylindrical combination core of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail:

In Mechanical processing of casting process, be all generally the release method adopting with certain taper, even if but product surface roughness less demanding also needs that this method obtains carry out secondary operations because part has tapering, may affect assembling or use.This has just increased production cost.For some surface roughnesses cast product less demanding and simple in structure, can adopt the method for combination core to produce.

As shown in Figure 1 and Figure 2, a kind of cylindrical combination core, is mainly comprised of upper fixing element 1, core box 1, core box 23, lower fixture 4.This core box 1, core box 23 are comprised of two semicircle arc columns, and two ends become symmetrical convex shape structure; Core box 1 forms cylindrical core chamber together with being interlocked with core box 23, and it is outside with core box 231 end face projections that upper fixing element 1 is arranged on core box 1, for fixedly core box 1 and core box 23; It is outside with core box 23 other end projections that lower fixture 4 is arranged on core box 1, acts on suitable with upper fixing element 1; Fixed part 1 is tabular circular ring structure with lower fixture 4.

During work: core one end is fixed, sand flow is put into from the other end, machine the fixture at two ends is disassembled, core box can be separated Mechanical processing of casting is completed,

The core box that the cylindrical combination core of the utility model adopts becomes detachable form, and product quality is greatly improved, durable in use, is applicable to very much the needs of batch production.

Claims (1)

1. a cylindrical combination core, is characterized in that: this core is mainly comprised of upper fixing element (1), core box one (2), core box two (3), lower fixture (4); Described core box one (2), core box two (3) are comprised of two semicircle arc columns, and two ends become symmetrical convex shape structure; Core box one (2) forms cylindrical core chamber together with being interlocked with core box two (3), and it is outside with core box two (3) one end face projections that upper fixing element (1) is arranged on core box one (2), for fixedly core box one (2) and core box two (3); It is outside with core box two (3) other end projections that lower fixture (4) is arranged on core box one (2); Fixed part (1) is tabular circular ring structure with lower fixture (4).