CN203743256U

CN203743256U - Integrally cast braking wheel

Info

Publication number: CN203743256U
Application number: CN201420078035.2U
Authority: CN
Inventors: 林富全
Original assignee: SHIFANG YONGSEN MACHINERY Co Ltd
Current assignee: SHIFANG YONGSEN MACHINERY Co Ltd
Priority date: 2014-02-24
Filing date: 2014-02-24
Publication date: 2014-07-30
Anticipated expiration: 2024-02-24

Abstract

The utility model discloses an integrally cast braking wheel, and belongs to the field of machine casting. The integrally cast braking wheel mainly comprises a main body and a rim. The main body and the rim are formed through integral casting, square notches are formed in the edge of the main body, the square notches are symmetrically formed in the main body, and semicircular notches are evenly formed in the rim. According to the integrally cast braking wheel, the two symmetrical square notches are formed in the main body, the positions of the square notches are the positions of dead heads during casting, the two dead heads can conduct good feeding on the edge of the main body of the large braking wheel, and formation of air holes and shrinkage cavities is reduced; meanwhile, the semicircular notches are evenly formed in the edge, the positions of the semicircular notches are the positions of dead heads of the rim, during casting, the dead heads which are arranged evenly can conduct good feeding on the edge of the rim, and the possibility of shrinkage cavity formation and shrinkage porosity of the rim is reduced; in addition, the square notches in the main body are designed for providing positioning convenience for later finish machining of the braking wheel, and the later finish machining is conducted conveniently.

Description

A kind of integrally casting Brake drum

Technical field

The utility model relates to machine casting field, especially, relates to a kind of integrally casting Brake drum.

Background technique

Brake drum is a vitals of conventional external-contacting brake, and the quality of its quality directly has influence on quality and the Braking efficiency of break.Require according to the technical standard of Brake drum JB/ZQ4389-1997: Brake drum wheel rim surface quenching hardness palpus 35-45HRC, the degree of depth is 2-3mm, wheel footpath D >=250mm person is ZG340-570 (ZG represents that implied meaning is cast iron), and therefore the blank of Brake drum wheel footpath D >=250mm generally adopts casting technique.Easily produce the defects such as slag inclusion, shrinkage cavity, pore for large-scale discoid foundry goods rim section in casting process, in the surface heat in later stage is processed, rim section is easy to crack, does not reach designing requirement, to such an extent as to the yield rate of Brake drum is low, additionally increase cost of production.

Model utility content

The utility model is for prior art problem, propose one and on main body and wheel rim, designed respectively a kind of integrally casting Brake drum jaggy, rising head position when gap position is also casting simultaneously, be arranged in because breach is uniform on main body and wheel rim, rising head just can carry out feeding to main body and wheel rim edge section equably, has reduced the formation of pore and shrinkage cavity.

The utility model is to realize by following technological scheme:

A kind of integrally casting Brake drum, comprise main body (1) and wheel rim (2), main body (1) and wheel rim (2) integrally casting form, main body (1) edge designs has square breach (4), square breach (4) is arranged symmetrically in main body (1), rising head position when square breach (4) is also casting simultaneously, rising head can carry out feeding to main body (1) equably.

Described wheel rim (2) is designed with the half round cut (3) of uniform arrangement, and half round cut (3) position is also mounted with rising head successively, and when casting, rising head can carry out feeding equably to rim section.

Further, described square breach (4) quantity is 2, and the quantity of described half round cut (3) is 6, and half round cut (3) diameter is no more than 1/10th of wheel rim (2) diameter.

The beneficial effects of the utility model are: in main body, be designed with two symmetrical square breach, rising head position when square gap position is also casting simultaneously, two rising heads can carry out good feeding to large-scale Brake drum body rim part, have reduced the formation of pore and shrinkage cavity; Simultaneously, also be designed with the half round cut of uniform arrangement in edge section, half round cut place is also wheel rim rising head position, when casting, the rising head of uniform arrangement can carry out feeding well to the edge section of wheel rim, reduce the possibility of rim section formation shrinkage cavity and porosity, in addition, the square breach design in main body, also for the fine finishing in Brake drum later stage provides location convenient, facilitates the fine finishing in later stage.

Brief description of the drawings

Fig. 1 is the utility model structural representation;

The title of component shown in figure and mark: 1-main body, 2-wheel rim, 3-half round cut, 4-square breach, 5-radiation hole.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail, and the schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present utility model in a schematic way, and therefore it only shows the formation relevant with the utility model.

As shown in Figure 1, a kind of integrally casting Brake drum, comprise main body (1) and wheel rim (2), main body (1) and wheel rim (2) integrally casting form, main body (1) edge designs has square breach (4), it is upper that square breach (4) is arranged symmetrically in main body (1), rising head position when square breach (4) is also casting simultaneously, and rising head can carry out feeding to main body (1) equably.

In order to increase the radiating effect of Brake drum main body (1), in main body (1), be designed with uniform radiation hole (5).

When casting, sprue hole position is arranged on the central authorities of Brake drum, cross gate is from Brake drum mediad Brake drum main body (1) fringe radiation, cross gate extends to gap position, gap position arranges rising head and sprue, like this, the liquid in rising head just can, by sprue so that Brake drum main body (1) and edge (2) part are carried out to feeding well, reduce the formation of shrinkage cavity and pore.

This practicality is by be designed with two symmetrical square breach in main body, rising head position when square gap position is also casting simultaneously, and two rising heads can carry out good feeding to large-scale Brake drum body rim part, have reduced the formation of pore and shrinkage cavity; Simultaneously, also be designed with the half round cut of uniform arrangement in edge section, half round cut place is also wheel rim rising head position, when casting, the rising head of uniform arrangement can carry out feeding well to the edge section of wheel rim, reduce the possibility of rim section formation shrinkage cavity and porosity, in addition, the square breach design in main body, also for the fine finishing in Brake drum later stage provides location convenient, facilitates the fine finishing in later stage.

Claims

1. an integrally casting Brake drum, comprise main body (1) and wheel rim (2), it is characterized in that: described main body (1) and wheel rim (2) integrally casting form, main body (1) edge designs has square breach (4), it is upper that square breach (4) is arranged symmetrically in main body (1), and described wheel rim (2) is designed with the half round cut (3) of uniform arrangement.

2. a kind of integrally casting Brake drum according to claim 1, is characterized in that: described square breach (4) quantity is 2, and the quantity of described half round cut (3) is 6, and half round cut (3) diameter is no more than 1/10th of wheel rim (2) diameter.