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Steps Of Die Casting Die(HPDC Mold) Design III
Die casting mold design, We often said as design of die casting dies or die casting die design. Also, Which be called die casting mould design in some countries.
The basic die casting die design steps are summarized as follows:
1. Understand and determine the task
2. Design preparation
3. Select the parting surface and die casting system
4. Choose the die casting equipment
5. Determine the appropriate mold structure and draw the mold assembly sketch *
6. Calculation and verification of relevant parameters *
7. Draw the die casting mold pattern *
8. Proofreading and review *
9. Organize and archive design materials
At last, The steps 7-9 of die casting mold design on this page.
STEPS OF DIE CASTING DIE(HPDC MOLD) DESIGN III
7. Draw the die casting mold pattern *
Draw according to the national drawing standards, sometimes combined with factory custom drawing methods that are not specified by the national standards
1) Draw a die-casting drawing
Before drawing the mold assembly drawing, the die-casting drawing should be drawn, and it should meet the requirements of the part drawing and process data. The size guaranteed by the next process should be marked with the words "process size" on the drawing. If after die-casting, except for repairing the burrs, no other machining is performed, then the process drawing is exactly the same as the part drawing. It is best to mark the part number, name, material, material shrinkage rate, drawing ratio, etc. under the die-casting drawing. Die casting drawing and material shrinkage are usually drawn on the mold assembly drawing.
2) Draw the mold assembly structure diagram
The die-casting mold assembly drawing reflects the assembly relationship between the parts, the shape and size of the main parts and the working principle of die-casting. When drawing the mold assembly drawing, try to use a 1:1 ratio, first start drawing from the cavity, and draw the main view and other views at the same time. Code all the part numbers in order, and fill in the detailed list, marking the technical requirements and instructions for use.
The mold assembly drawing should include the following: the structure of the pouring system and the overflow system, the position of the parting surface and the method of parting and taking parts, the shape of the mold and the positioning of all connecting parts, the position of the guide, the overall size of the mold, auxiliary tools ( Picking and unloading tools, calibration tools, etc.), related technical instructions, etc.
3) Draw a part drawing
In addition to standard parts, all mold parts that need to be self-made should be separately drawn to meet the requirements of mechanical drawing specifications to meet the requirements of delivery processing; the drawing number of the part drawing should be consistent with the part drawing number in the assembly drawing so that it is easy to check the reason The sequence of disassembling and drawing parts of the mold assembly drawing should be: first inside and then outside, first complicated and then simple, first dismantling and drawing forming parts, and then dismantling and drawing structural parts.
Graphics requirements: draw according to scale, allowing zoom in or zoom out. The view selection is reasonable, the projection is correct, and the layout is appropriate. In order to make the processing personnel easy to understand and easy to assemble, the graphics should be as consistent as possible with the assembly drawing, and the graphics should be clear.
The dimensioning requirements are unified, centralized, orderly, and complete. The order of dimensioning is: first mark the main part dimensions and draft angle, then mark the matching dimensions, and then mark all the dimensions.
Mark the mating dimensions first on the non-main parts drawings, and then mark all the dimensions. Other content, such as part name, mold drawing number, material designation, heat treatment, and hardness requirements, surface treatment, graphic ratio, processing accuracy of free size, technical description, etc. must be filled in correctly.
8. Proofreading and review *
Check the view positions of all parts drawings and assembly drawings, whether the projection is correct, and whether the drawing method meets the national standards of drawing.
Whether the placement of each mold part on the assembly drawing is appropriate and whether it is clearly indicated; whether the part number, name, and production quantity on the part drawing are omitted, whether it is a standard part or a non-standard part; the material, heat treatment, surface treatment, and surface of the mold part Whether the degree of finishing is marked and clearly described; the working size and matching size figures should be correct and no missing size.
Check the processing performance (whether the geometric structure of all parts, drawing methods, dimensions, etc. are conducive to processing); whether the position of the parting surface and the precision of finishing meet the needs, and whether there will be flashing. After opening the mold, can it be ensured that the die-casting parts remain on the side of the mold with the ejector device, whether the demolding method is correct, whether the size, position, and quantity of the push rod (push tube) are appropriate, and whether the push plate will be stuck by the core, Will it scratch the die casting parts.
Whether the location, size, and quantity of the flow line of the cooling medium are appropriate; whether the location and size of the pouring system and the overflow system are appropriate.
When the die casting part has an undercut, whether the mechanism for removing the undercut is appropriate, such as whether the slider and push rod in the inclined pin core pulling mechanism interfere with each other.
9. Organize and archive design materials
From the beginning to the success of mold design processing and inspection, the technical data generated during this period, such as the task book, the part drawing, the technical manual, the mold assembly drawing, the mold part drawing, the base drawing, the mold design manual, and the inspection record sheet, Trial and repair records, etc., are sorted, bound, numbered and archived according to regulations.