Metal Centrifugal Casting mold technical requirements
The vast majority of metal pattern is formed by casting blank. So in the Centrifugal Casting mold design, should according to material properties, mold manufacturing conditions and application requirements, the Centrifugal Casting mold blank and product presents various aspects of requirements, in order to better ensure quality Centrifugal Casting mold and reasonable manufacturing costs.
Making 1) material properties Centrifugal Casting mold blank should be consistent with the corresponding standards. Casting die surface after machining is not allowed to have any casting defects. In order to ensure the stabilization of the size of the blank Centrifugal Casting mold, especially iron castings shall generally be carried out artificial aging treatment, complex blank larger should be two times the artificial aging treatment.
Making 2) on Centrifugal Casting mold product requirements are as follows: making the metal casting die surface roughness.
Position limit deviation of making the working body and the locating reference of ± 0.05mm.
Shape dimension limit deviation of making the work surface is convex concave body for 0mm, -0mm, should be stated in the technical conditions. Making the Centrifugal Casting mold transfer radius limit deviations: R ≤ 15mm, the limit deviation of 0.5mm; R>15mm, the limit deviation of 1.0mm. making the small Centrifugal Casting mold base (sub surface) plane of 0.05mm. Medium and large Centrifugal Casting mold surface flatness is 0.1mm.
Making the core head locating and fixing sand core role. In mass production, the core head size precision ball even than the size precision request higher. For manual core and horizontal type mechanical core. Limit deviation Centrifugal Casting mold core head size is 100mm for 0mm in general, and the Centrifugal Casting mold core head size limit deviation >100mm is 0mm. Sand core head and core base are in clearance fit; no box extrusion moulding the core frame for vertical type (core cover) mechanical core, then between the sand core and the core base which is in interference fit, the amount of interference is generally 0.1 ~ 0.4mm.
All casting round making the castings must be clearly marked in the Centrifugal Casting mold. In addition to specify requirements of products and casting technology of the fillet on the Centrifugal Casting mold on the outside, should explain the radius of numerical casting did not note the fillet and round in the technical conditions.
Making the draft. In order to improve the convergence rate of work, less for tool (CNC machining exception), the same Centrifugal Casting mold taper numerical types that less is more. In addition to figure stated, draft numerical unspecified should be stated in the technical conditions.
Making the logo on the Centrifugal Casting mold. In order to meet the needs of modern management and casting quality traceability, product graph and casting process designers, often require a specified location in the Centrifugal Casting mold to make all kinds of signs, such as: part number, trademark, manufacturer name, serial number, Centrifugal Casting mold casting production time (production date, frequency and so on), and said the direction of the arrow with a special use mark. These signs, most complicated structure and small, there are specific standards and regulations, and cast out clear, beautiful, easy to recognize. Therefore, should adopt the fine processing methods, such as electric spark machining to make these identification. Some do not need to change the logo, can be made directly in the Centrifugal Casting mold the piece. However, most identification is first made of standard parts, and then embedded in the die casting die body.