The working principle of stamping dies, what are the methods of stamping die processing?

The stamping die, also known as the cold die, uses the pressure of the stamping machine to act on the die to change the shape of the metal placed in the die. There is a drawing die from the function of the mold. Punching dies.

Bending dies. riveting dies, etc. The working principle of the stretching die is to use the convex and concave die of the same shape to press the material through the pressing plate, and process the metal material according to the design needs to process various geometric three-dimensional products.

Among them, there are many factors to consider, such as the punch pressure, the elongation rate of the metal material, the complexity of the product geometry, the pressing force of the mold, the gap between the molds, etc. The punching die has a simple single punching die and a continuous die with a complex structure, and the main consideration is the machine tool pressure, die punching force, die discharge force, punching clearance and the structural rationality of complex shapes. There are many kinds of bending dies, including straight angles, acute angles, obtuse angles, and complex geometric shapes.

The riveting die is generally very simple, mainly the straight table and R angle of the riveting punch should be appropriate, just simply say that I hope it can help you.

Stamping dies. The principle.

Stamping is at room temperature, utilizing the mounting on.

Presses. The mold on the material exerts pressure on it, causing it to be generated.

Detachment or. Plastic deformation.

So you get what you need.

Part. a kind of pressure.

Processing method. First, the working process of the stamping die:

Blanking. Punching dies.

Its working principle is as follows, directly or by asking the upper die fixed on the upper mold to form the upper die, which passes through the mold handle with.

Punch. slider.

Connected. The zero fixed on the lower die forms the lower die of the mold, and is fixed by using a pressing plate.

Set on the punch.

Workbench. Above. The upper mold and the lower mold are guided by the guide and the guide. When working, strips.

Relying on the blocking material to feed into the positioning, when the upper die descends with the slider, the discharge is pressed first.

sheets. Then the convex punch off the concave above the material obtained.

Workpiece. This time work.

Pieces are stuck in. punch.

With the smell of the top block, scrap.

Also tightly clamped to the punch. When the upper die is lifted, the workpiece is pressed against the top plate by the ejector.

Borrow the spring's elastic force from.

Die. ejection in the opening; At the same time hoop the waste material on the punch, by.

Stripper. Unload by the elastic force of the spring.

drop, and then take away the workpiece, so that the entire blanking is completed.

Process. The strip is then fed into a step for the next punching.

The blanking process is carried out in such a reciprocal manner.

Second, the classification of stamping dies:

1. Open mold: simple structure and size. Small, heavy.

Light, easy to manufacture, low cost, but. Life span. Low、

Precision. Poor, suitable for high precision requirements, simple beginning, small batch or trial production of punching parts.

2. Guide plate type: the accuracy is higher than that of the open die, which is suitable for punching parts with simple beginnings and small workpiece size. Ask for pressure.

The stroke of the force machine is not greater than.

Guide. Thickness.

3. Guide pillar type: guide pillar guidance guarantee.

Punching clearance. Uniform, punched parts of the workpiece.

Dimensional accuracy. high, mold use.

Long life, easy installation, suitable for mass production.

4. Progressive die: strip requirements.

Precise positioning. Envoy. Hole. And.

Shape. Mutually.

Positional accuracy. Guaranteed. Productivity.

High, with a certain punching accuracy, suitable for mass production.

5. Composite die: The internal appearance of the stamping parts has high mutual position accuracy, which is suitable for mass production.

1. Hand grinding and polishing.

The traditional mold surface processing method mainly relies on the experience and technology of the operator, and the manual polishing is more time-consuming, inefficient, and some more complex curved surfaces or hook seam grinding and polishing will be more difficult to handle.

2. Machining - CNC milling machine.

In this stamping die processing surface processing method is not processed by fast efficiency, and the processing is excellent, except for the cavity with internal acute angles and the extremely narrow and deep cavity, other aspects can be competent. It has become the mainstream process of stamping die processing in foreign countries, and China is also actively developing.

3. Machining - grinding.

Commonly used grinding equipment includes surface grinders, internal and external cylindrical grinders, and tool grinders. In order to ensure accuracy, CNC processing is generally selected. According to the shape of different parts to choose the appropriate type of grinder, plate parts choose surface grinder, cambered and rotary surface parts use internal and external cylindrical grinder or tool grinder.

Although the structural form and complexity of various types of stamping dies are different, and the parts that make up the molds are diverse, they are always divided into upper and lower dies. The upper die is generally fixed on the slider of the press through the mold handle, and moves up and down along the guide rail of the press along with the slider, and the lower die is fixed on the workbench of the press. The classification and function of the constituent parts of the stamping die are as follows:

1. Working parts.

A part that is in direct contact with the stamping material and applies pressure to it to complete the stamping process. The working parts of the die include punches, dies and convex dies, also known as forming parts, which are the most important parts in the die.

2. Locate parts.

Determine the correct position of the material or process part in the die, so that the stamping part can obtain the parts with qualified quality requirements. The positioning parts that belong to the feeding guide include guide pins, guide plates, side pressure plates, etc.; The positioning parts that belong to the feeding distance include the initial material blocking pin, the material blocking pin, the guiding pin, the side edge, etc.; The positioning parts that belong to the block material or process parts include positioning pins, positioning plates, etc.

3. Pressing, unloading parts.

This kind of part plays the role of pressing material, and ensures that the waste or stamping parts stuck on the punch and in the die are removed or pushed (ejected) out, so as to ensure that the stamping work can continue.

4 Guide parts.

Ensure the accuracy of the mutual position between the punch and the die, and ensure that all parts of the mold maintain a good state of motion, which is composed of guide pillars, guide bushes, guide plates, etc.

5. Supporting parts.

It connects and fixes the above-mentioned various parts on a certain part, or connects the die with the press, which is the basic part of the die. It mainly includes upper die holder, lower die holder, fixed plate, backing plate, mold shank, etc.

6. Fastening parts.

It is mainly used to fasten and connect various die parts, such as various bolts, screws, round pins, etc. The above-mentioned guide parts and support parts are called mold bases after they are assembled.

Summary. Hello, the common stamping dies are: punching dies, bending dies, drawing dies, forming dies, riveting dies.

Hello, the common stamping dies are: punching dies, bending dies, drawing dies, forming dies, riveting dies.

Stamping die is a special process equipment that processes materials (metal or non-metal) into parts (or semi-finished products) in cold stamping processing, which is called cold stamping die (commonly known as cold stamping die). Stamping is a pressure processing method that uses a die installed on a press to apply pressure to the material at room temperature to produce separation or plastic deformation, so as to obtain the required parts.