3 The difference between punching and drawing convex dies

The difference between punching and drawing convex die is: different principles, different advantages, and different uses.

First, the principle is different.

1. Punching convex and concave die: Punching convex and concave die is separated from the material through heat treatment and tempering process, and the position of the deformation zone, the nature of the deformation, the distribution of the deformation and the blank in the process.

The stress state and distribution law of each part are changed accordingly to form the part.

2. Drawing convex and concave die: Under the action of the flat plate or hollow blank under the action of the punch, the annular part of the blank placed between the die and the edge pressing ring produces plastic deformation and is continuously pulled into the gap between the punch and the die by the punch to form parts.

Second, the advantages are different.

1. Punching convex and concave die: The product made of punching convex and concave die has high wear resistance, compressive yield point, and high strength and toughness.

2. Drawing convex die: The process of drawing convex die has high productivity, high material utilization, certain dimensional accuracy and low surface roughness.

It is capable of manufacturing deep-drawn parts as small as a few millimeters and as large as several meters, as well as thin-walled and complex parts that are not easily formed by other processing methods.

Third, the use is different.

1. Punching convex and concave die: Punching convex and concave die is mainly used for various plates.

Blanking and punching, including working parts, positioning parts, pressing, unloading and discharging parts, guide parts, fixed parts, fastening and other parts.

2. Drawing convex die: Drawing convex die occupies a very important position in the production of machinery, electronics, electrical appliances, instruments, automobiles, aviation, military products and people's daily necessities.

Encyclopedia - punching die.

Encyclopedia – Deepened.

Punching is to remove the excess part of the material, and drawing is to deepen and lengthen the shape, without removing the material or breaking the material.

The hard requirements for punching convex die materials are as high as CR12. . . If you stretch it, the convex and concave die requirements are low, and 45 is enough.

The punch fits tightly with the splint and the head has a step.

Straight-through punch with a round pin inserted into the upper end.

The ends are riveted after tempering and are used for straight-through punches with unchanged cross-sections.

The punch and the splint fit section is large, and can be fastened with screws.

The punch is fastened with screws and pins as a whole or in pieces.

Fix with epoxy perfusion.

The upper die base is slotted transversely, which is closely matched directly with the punch, and is used for the punch to allow a slight longitudinal movement.

The punch is fastened directly to the press with internal threads and is used in small and medium-sized double-acting presses.

If the thickness of the punch is less than 3mm, the quick-change structure can be used.

Now it is more commonly used to wire cutting fixed plate, in the past, when there was no wire cutting, it was often directly drilled in the punch, tapped, and drilled pins.

Shoulder fixing, screw fixing, pin fixing, hanging pin fixing, pressure plate fixing, willow joint fixing, binder pouring fixing, etc.

Summary. Hello, stepped punch punching is a way to reduce the punching force. When punching multiple holes at the same time, the punch is made into a stepped form with different heights relative to the blank, and the punching force can be effectively dispersed during blanking.

Punches and dies with simple shapes, punches and dies that are easy to be damaged and need to be changed quickly, are generally processed separately. The characteristics of this processing method are: the machining precision of punch and die is high, and punch and die have interchangeability, but the cost is higher.

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Hello, stepped punch punching is a way to reduce the punching force. When punching with the porous finger, the punch is made into a stepped form with different heights relative to the blank, and the punching can have the dispersion of the punching effect. Punches and dies with simple shapes, punches and dies that are easy to be damaged and need to be changed quickly, are generally processed separately.

The characteristics of this processing method are: the machining precision of punch and die is high, and punch and die have interchangeability, but the cost is higher.

There are national standards for the thickness of the fixed plate and the die of the cold stamping die, and you can consult the design manual of the relevant die.

The matching gap between punch and die should generally be determined according to the material and thickness of the stamped material, as well as the specific requirements of the design for the product.

The cross-sectional quality of the whole punching part includes collapsed corner zone, bright zone, fracture zone and burr. Generally speaking, burrs are inevitable and can only be reduced, mainly by adjusting the convex and concave die gap to control the size of the burr.

Extrusion is the process of placing a cake blank (usually heated) into a die, which extrudes it into a workpiece. During the extrusion process, the cake material moves in the gap between the punch and the die. According to the different flow directions of metal and punch, they can be divided into forward extrusion, reverse extrusion, composite extrusion and radial extrusion.

The manufacture of the MacPro can be seen to be reverse extrusion, i.e. the metal flows in the opposite direction to the punch.

Summary. How to get the value of the convex and concave die r of the stretching die? Hello dear, the design of the stretching die, there is a calculation formula, that is, the stretching coefficient:

m=an an-1, the ratio of the cross-sectional area after stretching to the cross-sectional area before stretching, at the time of the first stretch, the stretch coefficient should be around the right, the coefficient of the subsequent n stretches should be around the right, and the stretch coefficient of the last stretch should be around the right. There is also a calculation formula for the selection of the r angle of the tensile die, that is, the relative thickness of the blank t d0 100. For example, when the material thickness is, d0=100, that is, 1 100 100 1, and the value of the formula is 2 1, the r angle of the part without flange is 6 8 t.

How to get the value of the convex and concave die r of the stretching die? Hello dear, the design of the drawing die, there is a calculation formula, that is, the stretch coefficient: m=an an-1, the ratio of the cross-sectional area after stretching to the cross-sectional area before stretching, in the first stupid stretching, the stretching coefficient should be around the left, the coefficient of the subsequent n stretches is around, and the stretching coefficient of the last stretching is around.

There is also a formula for calculating the R angle of the stretched die, which is the relative thickness of the blank T d0 100. For example, when the material thickness is, d0=100, that is, 1 100 100 1, and the value of the formula is 2 1, the r angle of the part without flange is 6 8 t. When the value of the formula is 1, the angle r with the code is 8 10 t, and when the value of the formula is 1, the angle r is 10 15 t.

How big is the non-embroidered steel drawing height 150 die r.

How big is the non-embroidered steel tensile high 150 die r, the diameter and height ratio of the punch is to let a limit parameter is generally 1:1 The highest can be achieved, pay attention to the high slip deep fillet resistance, too small will be broken. Qi Chun hopes to help you.

Summary. Stamping die products are usually manufactured on a die. A stamping die is made up of a punch and a die that forms the shape of a sheet metal by applying pressure between the two dies.

Punches are usually used to form shapes in a die. Therefore, stamping die products are manufactured on a die .

Stamping dies, whether the product is on the die or punch.

Stamping die products are usually manufactured on a die. The punching and pressing die is composed of a punch and a die, and the shape of the sheet metal is formed by applying pressure between the two dies. Punches are usually used to form shapes in a die.

Therefore, the stamp mold product is a ruler made on the die.

Can you tell us more about that?

A stamping die is one of a variety of molds that are used to form parts of a specific shape and size on materials such as sheet metal. It consists of two molds, the upper and lower dies, the concave die and the punch. The die is made up of a workbench and a die base, a die head, a template and a die base plate covered on it, while the punch is made up of a moving block, a top plate, a top, a top die judgment plate and a top die base, etc.

During the stamping die operation, pressure is applied from top to bottom, and the sheet metal is bent or sheared into the desired shape. In this case, the punch can be a tool used to support the sheet metal and form the desired shape of the die. The die is a tool used to slowly press the sheet metal into the desired shape.

Therefore, when manufacturing stamping die products, the die is usually the main manufacturing tool. Stamping dies are widely used in automobiles, electronics, home appliances and other industries, and can be used to produce automotive bodies, electronic equipment shells, panels and other products. Due to the advantages of high efficiency, low cost and flexible design, stamping dies have an important position in modern manufacturing.

Punching die: according to a certain sequence of procedures, in the slider of the punch press once to and, in different positions of the die, complete the punching, blanking guide two on the punching process of the punching die, also known as the die or skip die.

Stretch film: also known as stretch film, it is produced by the proportion formula of imported linear polyethylene LLDPE resin and tackifier special additives. It has the characteristics of high transparency, high longitudinal elongation, high yield point, high transverse tear strength and good puncture performance.

It can be applied to the requirements of high magnification pre-stretching.

Stamping includes blanking and forming, where punching refers to the method of removing materials (such as punching and blanking) to obtain the corresponding shape; Forming refers to the method of obtaining the corresponding shape of the sheet metal under the action of the convex and concave die without removing the material. Forming includes drawing, reaming, flanging, bulging, bending, etc. Stretching is like punching a round sheet into the shape of a top hat, considering the depth of the stretch, the speed of the punch, etc.