Design program flow of zinc alloy die casting die

The design scheme of zinc alloy die casting die generally includes the following aspects:

1、 Obtain necessary information and data, including: die casting part drawing, size, dimensional tolerance, form and position tolerance, surface roughness, material, heat treatment requirements and other technical requirements; production batch and delivery date of die casting parts; equipment status of zinc alloy die casting production unit (i.e. die casting machine model); processing capacity and equipment status of mold processing unit; other user requirements 。

2、 The structure, material and technical requirements of zinc alloy die casting were analyzed

1) Whether the structure of die casting can ensure the quality of casting and good molding is analyzed. For example: whether the wall thickness of die casting is uniform and reasonable; whether there is fillet at the corner; whether the diameter and height ratio of hole are appropriate; whether the required dimensional accuracy and surface roughness are appropriate; whether additional demoulding slope is required; whether there is plug-in, etc.

2) The requirements of alloy materials for die casting parts were analyzed, and the suitable die casting machine was selected.

3) In case of unreasonable or inappropriate structure and requirements, put forward modification suggestions and discuss with customers. Only when product design, mold design, mold manufacturing and product production are organically combined, can high quality die castings be obtained.

3、 Determine the number of cavities, select parting surface, gating system and overflow system

1) According to the production batch of die casting machine and die casting, the cavity number of die casting model is preliminarily determined.

2) The basic principle of parting surface selection and reasonable selection of parting surface position are given.

3) According to the structural characteristics of the casting, the type of gating system and gate position are selected reasonably to make the casting have molding conditions.

4) Determine the shape and location of the overflow system.

4、 Select the die casting machine model, calculate the required clamping force according to the die casting quality and the projected area of the die casting parts on the parting surface, and combine with the actual situation of the die casting machine owned by the die casting unit, and preliminarily select the die casting machine (the die casting machine model is finally determined after checking the relevant parameters of the die casting die and the die casting machine)

5、 After determining the parting surface, gating system and overflow system, the following aspects should be considered

1) Determine the structure of the formed part. If it is inlaid, the combination form and fixed form of insert and core are determined.

2) According to the shape characteristics of side hole and side concave, the structure and composition of core pulling mechanism are determined.

3) Determine the form and layout of the guiding mechanism.

4) According to the structural characteristics of the die casting, the type of ejection mechanism is selected, and the pushing position of the die casting and the reset and guiding form of the ejection mechanism are determined.

5) Determine the form of the temperature regulation system, and preliminarily consider the layout of the cooling channel (the position and size of the cooling channel will be determined after the position and size of each mechanism in the general assembly drawing of the mold are determined)

6) When considering the composition of each mechanism of the die, the machining performance of the parts should be considered.

6、 Selection of die parts material and heat treatment process

7、 Sketch the mold structure. Sketch the structure to check the coordination between the structures under consideration. For inexperienced designers, this sketch is used to solicit opinions from mold manufacturing and mold operators in order to introduce their rich practical experience into the design.

8、 Parameter calculation and verification

1) The forming dimension of the formed part is calculated.

2) Calculate and check the cavity side wall and base plate thickness of the molded part to determine the dimensions of the template (can be found in the figure and table)

3) The core pulling force, core pulling distance, die opening stroke and the size of inclined guide pillar were calculated.

4) Check push rod compression instability.

5) Check the relevant parameters of die casting machine, such as clamping force, cavity capacity, opening stroke, mold installation size, etc.

6) Calculate the parameters of the temperature regulation system (empirical data can also be selected).

9、 Draw the assembly drawing of die casting die. In addition to the assembly relationship between parts, the assembly drawing of die casting die should also indicate:

1) Mold size and installation size;

2) Die casting machine selection;

3) The opening stroke and ejection stroke of the ejection mechanism;

4) Gating system and its main dimensions

5) The action process of special mechanism;

6) Mold part name;

7) Technical requirements for die casting die components

10、 Drawing the parts drawing of die casting die, starting from the forming parts, the structural parts such as moving and fixed die sleeve plate, sliding block and inclined guide pillar are designed. The drawing of die parts should correctly reflect the shape of the parts, and indicate the size, dimensional tolerance, shape and position tolerance, surface roughness, technical requirements and material heat treatment requirements.