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1、 Product Introduction:
1. Precision mold stamping convention product introduction process
(a) Product drawing → Processing drawing → Layout drawing → Structural drawing → Assembly drawing → Mold drawing
(b) Continuous mold layout and structural diagrams must be reviewed
(c) The layout and structural diagram of the single punch mold must be reviewed
(d) The mold drawings must be reviewed and signed to take effect, and the specifications of the drawings are clear
2. Sample control process
On site sample provision → self inspection → quality inspection department inspection → inspection report → inspection report confirmation → engineering department → customer
2、 Mold design process
1. Mold design process
(1) Mold Design Flowchart:
(2) This is the basic process of mold planning, and usually, the planned operations should be planned and implemented according to this process flow. Regarding the planning of some special products, based on this process, appropriate changes can be made according to the actual situation.
2. Production standards for product drawings, open drawings, processing (process) drawings, and strip drawings
（1）product drawingThe product images or samples used for mold making shall be provided by the customer and the document control center. Due to the fact that product drawings come from various customers with different standards, unclear drawings, incomplete markings, and confusing standards or testing criteria, errors may be overlooked by humans. Therefore, based on the original design, one should create their own product image for their own use while remaining faithful to the original design. Communicate with customer engineers in a timely manner regarding process issues in customer drawings. If the process or structural requirements are difficult to meet, it is possible to negotiate with the other party's engineer to solve the problem by reducing the process requirements, changing the product structure, or adding process auxiliary technologies. The customer's original drawings shall not be altered and shall remain unchanged. Accurately survey the samples provided by the customer and draw product drawings using various methods. Customer samples should be properly stored. The product drawings produced require accurate data, clear requirements, complete scale markings, reasonable public use, and easy inspection.
（2）Working drawingAfter the product drawing review is approved, the processing drawing is formulated. The development of processing drawings should pay attention to the following points:
A: The product scale values are divided into two situations: punching and dropping. The punching size is determined by the punch, and the cutting size is determined by the mold.
B: The value of product services is based on the product drawings. If the service is marked on the product drawing, follow the drawing. If the service is not indicated on the product drawing, the service used by the customer shall prevail.
Regarding the proportion that will increase after punching, the proportion of the machining drawing is 2/3 of its upper error, while the proportion of the machining drawing after punching will decrease, and the proportion of the machining drawing is 2/3 of its upper error. If the distance between the center and edge of the hole remains unchanged after punching, the value will be determined based on the center service.
C: Consider the deformation trend of the product during the molding process and take some pre compensation measures for these deformation situations.
（3）Open the pictureOpen the drawing according to the processing drawing and mark the length of each section for easy viewing.
A: The outer layer of the board is subjected to tensile stress during the twisting process, while the inner layer is subjected to compressive stress. From stretching to compression, there is a transition layer that has neither tension nor pressure - the neutral layer. The length of the neutral layer during the bending process remains the same as before the bending, so the neutral layer is the benchmark for calculating the opening length of the bending part. The thickness of the neutral layer and the intermediate layer is a different concept. The direction of the neutral layer is related to the degree of deformation. The larger the radius of curvature, the smaller the bending viewpoint, and the smaller the degree of deformation. The neutral layer is located near the center of the thickness of the board; When the radius of curvature decreases, the bending viewpoint increases, and the degree of deformation correspondingly increases. The orientation of the neutral layer gradually moves towards the inner side of the curvature center. The interval from the neutral layer to the interior of the sheet metal is represented by λ.
B: Open the basic formula of the accounting method: product open length=material compensation amount inside the material
a: The principle of opening the R-angle is to keep the length of the neutral layer data unchanged.
In R=Kt within R
(4) Material strip diagram (process diagram, layout diagram)
a. Based on customer requirements such as product accuracy, product output, mold life, and process characteristics, decide whether to use continuous molds or single process molds.
b. Determine the classification of mold accuracy levels based on product requirements, total mold production volume, mold production speed, etc. Fine continuous molds are divided into four levels: A, B, C, and D. Fine single process molds are divided into three levels: A, B, and C.
Among them, the follow-up of mold design also includes: drawing the final assembly drawing of the mold, drawing the structural side view, drawing the structural front view, placing standard parts, arranging the bending process, splitting template parts, brushing BOM list, hardware parts list, etc. I won't describe them one by one here.
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