Mold design of hardware accessories: (the soul of mold)

1. First of all, analyze the product drawing or product to find out the difficulties of the product. In the stamping process, there will be factors affecting the size, stability, molding difficulty, component vulnerability, appearance damage and so on.

2: Processing of product drawing file, original drawing file or digital copy map, 3D (3D to 2D), 2D (pay attention to the Angle method of the drawing file view).

3: Tolerance processing of product data should be carried out after the determination. If this step is not handled properly, it will affect the subsequent mold size adjustment and increase the mold modification and manufacturing cost.

4: Processing and expansion according to experience, engineering step map (forming bending mode)

5: Combined with the structure of the product, put forward our difficulties, problems, application tolerances, raw edges, requirements for material points and so on.

6: Start engineering layout, design material belt (if the above several problems are solved, this step will be very quickly) we generally want to put the product material, thickness, material width, step distance. Punch height, size. Material utilization rate, float height, indicate. The basic elements of the mold are done, the rest is according to our design standards with customers, and the understanding of the hardware mold drawing. (Mold design standards, we hope that each designer has their own drawing standards, so that drawing and processing are faster, in addition to the standards required by customers. But the premise is to ensure the general function of the mold as simple as possible, molding and dismantling quickly, reduce costs, convenient maintenance.)

Process control of die finishing:

Mold hardware accessories processing, a general guiding idea is for different materials, different shapes, different technical requirements for adaptive processing, it has a certain plasticity, through the control of processing, to achieve good processing effect.

According to the appearance and shape of the parts, the parts can be roughly divided into three categories: shaft, plate and shaped parts, the common process is roughly: rough processing - heat treatment (quenching, tempering) - fine grinding - electrical processing - pliers (surface treatment) - assembly processing.

Hardware mold accessories electrical processing control:

The cutting precision of the slow wire can reach ±0.003mm, and the roughness Ra=0.2μm. At the beginning of processing, check the condition of the machine tool first, check the deionization of water, water temperature, vertical degree of silk, tension and other factors to ensure a good processing state. Wire cutting machining is the removal of a whole piece of material. It destroys the original stress balance of the workpiece and is easy to cause stress concentration, especially at the corner. Therefore, when R < 0.2(especially the sharp corner), suggestions for improvement should be put forward to the design department. To deal with stress concentration in processing, the principle of vector translation can be used to leave a margin of about 1mm before finishing, pre-machining the rough shape, and then heat treatment, so that the processing stress in the first release before finishing, to ensure thermal stability.

When machining punch, the choice of cutting position and path of wire should be carefully considered. The left end of the workpiece clamping, processing route ① is better than the route ②, because the route ① workpiece and material clamping parts are closely connected, stable processing, if the route ②, the first time after feeding the workpiece into the wall, the force is poor, affect the subsequent several times processing. Route 3, the use of drilling wire processing, the best effect. High precision wire cutting processing, usually cut for four times, can ensure the quality of parts. When processing the concave die with taper, in line with the position of fast and efficient, the first rough machining straight edge, the second edge taper processing, and then finish the straight edge, so that there is no need to carry out X vertical finishing, only finish the straight edge of the cutting edge section, saving time and cost.

Edm first to make electrodes, electrodes have coarse, fine. The shape of finished electrode is required to be in good conformity, and it is recommended to use CNC machine tool to finish the machining. Electrode material selection, red copper electrode is mainly used for general steel processing. Cu-W alloy electrode has good comprehensive performance, especially in the process of processing consumption is significantly smaller than copper, with enough scouring fluid, it is very suitable for processing difficult materials and finishing parts with complex section shape. Ag-W alloy electrode has better performance than Cu-W alloy electrode, but its price is high and its resources are less. When making electrodes, the gap and the number of electrodes need to be calculated. When large area or heavy electrode processing is carried out, the workpiece and electrode clamping should be firm to ensure sufficient strength and prevent loose processing. In the process of deep step machining, attention should be paid to the loss of electrodes and the arc discharge caused by poor discharge of liquid.