pressing

get through

Stamping/punching process

Manufacturing and stamping process is to use external force to deform or separate the blank of the workpiece plate through the die, so as to obtain the workpiece with a certain size, shape and performance.

Drilling machine

Hardware appliance

Manufacturing process and process steps:

A, the analysis of parts process drawings

Design and draw hardware parts.

Three-sided diagram

And workpiece

perspective drawing

Its function is to express it with pictures.

sheetmetal

The structure of a work is expressed. Through the analysis of the part drawing, we can quickly understand the size, base point, straight line, curve and the position relationship of the cutting surface of the workpiece, and determine it

Workpiece origin

And calculate each

breakpoint

And curve connection points.

Second, reasonable selection of stamping materials

The materials used in stamping should not only meet the technical requirements of design, but also meet the requirements and follow-up of stamping process.

Process requirements

. ordinary

Metal stamping

These plates are low titanium alloy, carbon steel, stainless steel, aluminum, copper and their alloys.

(1) Cu-Al and its alloys are widely used as parts of equipment because of their good ductility and excellent electrical conductivity.

(2) The stamping process of carbon steel and stainless steel is often used to manufacture equipment shells, structural parts, boxes, etc. , but because of its strong rigidity, it is usually used.

Stamping oil

To improve the process.

(3) Titanium alloy stamping is mainly used for large equipment, aircraft, ships and other parts with high weight requirements, and the process is difficult, so special stamping oil must be used to improve the process.

Third, classified use.

Stamping equipment

According to the nature of the stamping process to be completed and the characteristics of various stamping equipment

Li Neng

Characteristics, considering the main factors such as deformation force required for stamping, die closing height, outline size, etc., combined with the existing equipment situation, the equipment type and tonnage are reasonably selected. According to the structure, it can be divided into three types: simple punch, continuous punch and composite punch.

(1) simple punching machine

One stroke of the punch only completes one process. That is to say,

blank

Or simply punch holes.

die

(2) Continuous punching machine

In one stroke of the punch, several punching processes are completed at different parts of the die at the same time, and the feeding distance is controlled by the stop pin.

(3) Composite punching machine

In one stroke, several stamping processes can be completed at the same time in the same part of the die. The biggest feature of compound stamping is that there is one in the die.

Semi-convex and semi-concave

Die,

Compound die

Suitable for stamping parts with large batch and high precision.

Fourth, the selection method of stamping oil

Stamping oil plays a key role in the stamping process. Good cooling performance and extreme pressure wear resistance can improve the service life of the die and the accuracy of the workpiece.

qualitative leap

. According to the different workpiece materials, the performance emphasis is different when selecting stamping oil.

(1) Silicon steel sheet is easy to die-cut, and low viscosity stamping oil will be selected on the premise of preventing stamping burr.

(2)

Carbon steel plate

When selecting stamping oil, we should first determine the better viscosity according to the difficulty of the process, the way of oil supply and the degreasing conditions.

(3)

galvanized steel sheet

Due to the chemical reaction with chlorine-containing additives, attention should be paid to the possibility of chlorine-containing stamping oil when selecting stamping oil for galvanized steel plate.

white blister

The problem of rust can be avoided by using sulfur stamping oil, but it should be degreased as soon as possible after stamping.

(4)

Corrosion resistant plate

It is easy to harden, so it is required that the drawing oil film has high strength and good sintering resistance. Generally, stamping oil containing sulfur and chlorine compound additives is used to ensure extreme pressure performance and avoid burr and fracture of the workpiece.

Five, determine the reasonable process type

The choice of surface technology method of workpiece is to choose a reasonable method for every surface with quality requirements on the part. According to the basic process, the main basic processes of stamping are divided into blanking, punching, bending and stretching. Generally, the final process method is selected according to the requirements of surface accuracy and roughness, and then the preparation process before seiko is determined.

(1) blanking and punching

Blanking and punching are both processes of separating blanks, and the processes of blanking and punching are exactly the same. Blanking and punching are collectively called blanking. Both the punch and the die of the blanking die have sharp cutting edges, and there is a gap between the punch and the die to ensure that the cut is neat and there are few burrs.

(2) Bending and stretching

Bending and stretching are the processes that make the workpiece obtain various cup-shaped or box-shaped parts. Make the bending and stretching part of the workpiece have a suitable fillet radius to avoid cracking when the workpiece is bent.