Introduction to multiple drawing

As we all know, when drawing, stamping and drawing products sometimes need to go through multiple drawing processes. Of course, it is better to stretch them once as much as possible. . These tensile forming processes can be divided into several types: tensile processing,’re tensile processing, thinning tensile processing, reverse tensile processing. Please refer to the introduction of these multi-drawing processes by stamping and drawing manufacturers below. 1. Tightening treatment: use the plate pressing device and the punching force of the punch to pull some or all of the flat materials into the cavity of the female die, so that it can form a bottomed container. The side wall of the container is parallel to the stretching direction, which is a simple stretching process. Some need to be expanded to form.

2. Redrawing: that is, for products that cannot be finished by deep drawing, semi-formed products after deep drawing need to be stretched again to increase the depth of the formed container.
3. Reverse stretching process: reverse stretching the parts stretched in the previous process, the inner side of the workpiece becomes the outer side, and the outer diameter decreases.
4. Thinning and stretching process: extrude the formed container into the cavity of the die slightly smaller than the outer diameter of the container with a punch, so that the outer diameter of the container with a bottom becomes smaller and the wall thickness becomes thinner, eliminating the deviation of the wall thickness, and making the surface of the container smooth
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Chip jumping of metal stamping die refers to the phenomenon that the sheet metal jumps to the die surface at the edge after blanking in the high-speed production die. As one of the common undesirable phenomena of metal stamping parts, chip jumping is caused for many reasons. Some are caused by improper mold design, some are caused by poor materials and stamping operators. Next, we will analyze the specific causes of chip jumping of the metal mold.
The first reason is that the punch or other parts of the stamping die metal have abnormal scratches or damage, resulting in small scrap materials. This is mainly because the punch has no corresponding structure when it needs to exert excessive effect on the material.
The second reason is that the blade gap of the metal stamping die is too large and the design of the blade gap is unreasonable. Reasonable clearance accounts for 4-6% of the material thickness. In the normal operation of metal stamping die, due to the frequent reciprocating friction between the sheet metal and the blade, the internal wear of the blade causes excessive clearance of the blade.
The third reason is that the raw materials have been surface treated before stamping, and there is unstructured fusion between the surface treatment layer and the surface treatment layer. The material will cause separation and blanking at the edge of the material.
Another reason is that the metal stamping die of the punch has magnetism, which generates suction on the plate and causes the chip to jump.

Stamping Die Components

Stamping die is usually composed of fixed die and movable die. The fastener is fixed to the press table with a clamping plate and screw, which is called the lower die. The movable part is fixed to the sliding block of the punch, i.e. the upper die. Then the upper die moves up and down with the sliding block for stamping.
Different components can be divided into 5 categories according to their functions:
1. Working parts: Working die parts are used for stamping, which can directly deform and separate sheet metal parts to obtain stamping parts. Such as punch blade, die blade, punch matrix, etc.
2. Test piece: The function of the pilot element is to control the feed direction and feed pitch of raw materials, and to ensure the correct position of the raw material plate of the die. Such as pins, positioning pins, guide pins, pin pins, pin plates, side clamping plates, etc.
3. Pressing, stripping and lifting parts: These stamping die parts are designed to ensure that stamping parts and waste materials can be discharged from the die after each stamping, so that the next production can proceed smoothly. For example: stripper, revamp, waste blade, etc.
4. Guide Components: These stamping die components are used to ensure the correct direction of the upper and lower dies in the relative movement process, so that the punch and female die inserts have a uniform gap, thus improving the quality of stamping parts.
5. Installation of fastening components: The function of these progressive die components is to connect the above four types of stamping die components together to ensure that the relative position of each die component is correct and that the die can be installed on the punch. .
Of course, this is not to say that each stamping die should have more than 5 die components. Once the stamping die is used for prototype or small batch production, to shorten the validation time and save cost, sometimes it could simplify the stamping die structure, which only has working components, stripping components and several fastened components. But for high volume mass production tools, except for the above 5 types of die components, there will be additional automatic feeding and ejection devices added to the stamping die, which can ensure the quality of the stamping part and increase the production efficiency rate and tool life time.

Types of Deep Drawing Processing

Generally speaking, a metal stamping manufacturer will divide the deep drawing process into four parts: deep drawing,’re drawing, reverse drawing and thinning&deep drawing.

Drawing process: use the punching force of the flat plate device and the punch to pull part or all of the flat plate into the cavity of the female die to form a bottomed container.

Re-drawing: In order to increase the depth of the forming container, it is necessary to re-draw the finished products after drawing.

Reverse drawing process: reverse drawing the workpiece drawn in the previous process, then the inner part of the workpiece becomes the outer part, and the outer diameter becomes smaller.

Thinning and deep drawing: extrude the formed container into a concave cavity slightly smaller than the outer diameter of the container with a punch, so that the outer diameter of the container and the bottom becomes smaller.

How Can Metal Stamping Use in The Medical

With the rapid development of the medical technology sector, medical equipment is crucial to the modern medical care industry. Manufacturers are facing the challenge of rising medical costs because prices are rising almost as fast as technology adaptation. To solve this problem, many professionals have begun to see metal stamping as a fast, consistent and more cost-effective solution.
In this case, high-precision metal stamping technology has become the preferred alternative for machining in medical applications. Today, metal stamping manufacturers can provide many micro and small metal parts, which are needed by the medical industry. Precision metal stamping has been widely used on many medical devices. It has become an important trend for the rapid development of the stamping industry in the future.

Differences between deep drawing and metal stamping

With the development of metal processing technology, it is very important to choose the right process to manufacture metal parts. Deep drawing and metal stamping are two different processes, which can produce metal parts according to the needs of the products. Deep drawing metal stamping is a sheet forming process that produces high dimensional accuracy and a smooth surface finish. Metal stamping is to strike the metal plate with a mold to form the desired shape.

Custom Metal Stamping Parts for MedicalIndustries

Zhejiang Balford Precision Stamping Co., Ltd. is a leading supplier of precision electronic stamping parts solutions in China. We specialize in micro precision metal stamping for various industries. From prototype to mold manufacturing to mass production, you will get the best solution. Especially in the manufacture of difficult and high-precision electronic stamping parts, we have rich experience and engineer R&D team, and have been recognized as the best supplier of electronic precision parts in China. With more than 20 years of industry experience, we have the knowledge and skills to produce high-quality stamping parts for customers in all walks of life, including medical metal stamping parts.

Metal Deep Drawing Process

Drawing is a process of forming metal sheets into cylindrical or box shapes by stamping, circular drawing or metal forming. Usually, deep drawing is carried out on the wrinkle proof plate of the double action press, which can effectively prevent the raised edge from wrinkling when it is pulled into the mold. Unlike other drawing processes, the drawing depth can exceed the original diameter of the blank.
Under the pressure of the press, the drawing die is used to process flat blank or hollow process parts into open hollow parts. It is one of the basic stamping processes. It can not only process rotary parts, but also process thin-walled parts with complex shapes such as box parts.
Dyeing can be divided into non-dyeing and dyeing. The wall thickness of the front parts is basically unchanged compared to the blank before drawing. Compared with the sheet before drawing, the wall thickness of the sheet after drawing has obvious changes. This kind of thinning is required by the product, and the features of the part are thick bottom and thin walls. In practical production, continuous thin drawing is widely used.
The die used for drawing is called the drawing die. The structure of the drawing die is relatively simple. Compared to the blanking die, the working part has a larger fillet. High surface quality requirements. The clearance between the punch and the die is slightly greater than the thickness of the sheet.

Advantages of Deep Drawing Stamping

Easy to use.

The drawing process is relatively simple, which is an ideal choice for companies that want to save labor costs. This type of stamping does not require as much expertise as some other methods, so your staff can easily learn how to operate the machine.

Adapt to complex designs.

As mentioned earlier, deep drawing can easily create complex parts without design constraints. This makes it a great choice for companies that need unique or customized metal parts without paying extra for a design.

Flexibility.

The advantage of deep drawing is the ability to use multiple material types. This is especially beneficial if you are trying to reduce costs or improve product quality by switching from one metal type to another.

Industry universality.

If you need help with mechanical problems or need more information about this manufacturing process, you can have the opportunity to contact more experts to help you, because deep drawing is applied in many industries.

volume production
Drawing can quickly and efficiently produce large quantities of high quality parts. This makes it an attractive choice for companies that need to create many products in a short time.

Easy to use.

The drawing process is relatively simple, which is an ideal choice for companies that want to save labor costs. This type of stamping does not require as much expertise as some other methods, so your staff can easily learn how to operate the machine.

Adapt to complex designs.

As mentioned earlier, deep drawing can easily create complex parts without design constraints. This makes it a great choice for companies that need unique or customized metal parts without paying extra for a design.

Flexibility.

The advantage of deep drawing is the ability to use multiple material types. This is especially beneficial if you are trying to reduce costs or improve product quality by switching from one metal type to another.

Industry universality.

If you need help with mechanical problems or need more information about this manufacturing process, you can have the opportunity to contact more experts to help you, because deep drawing is applied in many industries.

Precision Metal Electical Stamping

Metal electric stamping is a manufacturing process by which a sheet metal is formed or cut into a preferred shape using a pre-cut die. Stamping includes a range of technologies, such as stamping, blanking, bending, stamping, flanging, and more. In order to achieve a certain precision stamping forming, the die design was carried out by using precision CAD&#40. Computer aided design. Application of software. Since stamping requires a specific amount of clearance, accurate measurement of the die is particularly important.

For more than 20 years, Balford Precision Stamping has been a leading manufacturer of precision stamping parts for electromechanical components and electrical contacts. Our ISO 9001 certified facilities, including advanced manufacturing tools, allow us to provide comprehensive configuration files for custom manufacturing of stamping contact parts and electromechanical stamping parts. Our experienced team has a wealth of knowledge to overcome the most serious difficulties.

Zhejiang Bailford Precision Stamping Co., Ltd. is pleased to provide electronic stamping for automotive equipment, household appliances, aerospace equipment, elevator control and other electromechanical equipment.

Sheet Metal Stamping Process

The sheet metal stamping process is to press the hot-rolled or cold-rolled steel plate into the shape required for manufacturing parts. This technology allows a large number of parts to be produced at the same time, but it can also lead to the scrapping of about 15% of raw materials. This kind of equipment used in this method requires less space than other methods. Therefore, if your space is limited, this type of manufacturing may be the most suitable for your business. When selecting the sheet metal stamping method, three types of dies are mainly used – cutting, punching and bending.

Cutting includes cutting a part from a metal plate. This is done by striking the metal plate with the mold, which cuts it into the desired shape. The edges of stamping parts will have burrs, so they need to be drilled or machined before use.

Stamping is the process of placing a metal plate between two molds and pressing them together to make a hole in the metal plate.

Bending is the use of die pressure to deform the metal. This type of stamping is usually used to make parts with curves.

What Products are Made from Deep Drawing?

Deep drawing technology has been widely used in the production process, and deep drawing has been applied in many industries. For example, it can be used for the production of automotive electronic parts in the automotive industry. It can be used in the production of various industrial sectors such as electronics, daily necessities, instruments and meters, aerospace, etc. It can also be used to make household products, such as stainless steel kitchen sinks.

Deep Drawing Metal Stamping

Metal parts are essential in the construction and construction of medical devices. They must have high precision, durability and biocompatibility for internal and external use. Due to its huge versatility, metal stamping allows the medical industry to rapidly and efficiently produce and improve these tools.

One of the most powerful applications of metal stamping is the production of implantable medical device parts, which must maintain their shape and be very easy to disinfect.

In addition, this process provides a good way to produce customized options. Metal stamping adds a wide range of standard and custom medical devices, such as:

Battery pack.

Shield and half shell.

Capacitor element implantable cardioverter defibrillator.

Stamped and machined seals, seals and joints.

Neuromodulation project.

Implantable cardiac pacemaker.

Ventricular assist device.

Implantable drug infusion pump.

Implantable hearing aids.

Heju Stamping has developed a variety of products for the medical market. Our most unique products include:

Equipment chassis.

All permanently implanted medical devices, including cardiac pacemakers, cochlear devices, cardiac defibrillators, and drug pumps, are made of titanium. Titanium is the only metal that the human body will not reject.

Implantable components.

The implantable components include the external shielding of the device, the battery housing, and other components. By designing and manufacturing custom molds, Heju stamping uses metal stamping technology to manufacture parts for various purposes, which are cheap and fast.

Considerations for Deep Drawn Stamping

When considering deep drawing to meet your manufacturing needs, you should pay attention to the following points:

Reduce material waste: compared to other metal forming processes, deep drawing uses more base materials, significantly reducing material waste.

Measurement is critical: it is not only important to ensure accurate mold dimensions, but also important to consider material thickness and required measurement values. Incorrect measurement will lead to thin walls and inaccurate dimensions.

Draft and Taper: Due to the basic manufacturing process of deep drawing, some drafts and tapers at the top of the part are unavoidable. This should be considered at the initial design stage.

Different material thicknesses: Deep drawing parts usually have different thicknesses, with thinner walls and thicker bases. This can be mitigated by tools after the wire drawing process is completed.

Benefits of Deep Drawn Stamping

equipped with automatic feeding to improve efficiency. In fact, deep drawing is one of the fastest manufacturing methods in mass production. Deep drawing assemblies can also be created in one piece, reducing the need for additional assembly. This has the added benefit of seamless construction, which is ideal for waterproof or airtight applications.

Deep drawing has high universality, can be used to manufacture complex and fine parts, and has high accuracy and repeatability. More importantly, deep drawing parts have very strong strength because of the great compression applied to the metal during the forming process. The basic structure of the deep drawing metal is usually highly compressed into a very hard crystal structure.