Compound dies
Stamping or die forming is a cost-effective production method for large series manufacturing of products and components using a die mounted on a press to cut and form 3D objects from flat materials. The stamping process is carried out using specially built, fixed tools to ensure the long term and repeatable manufacture of high quality products.
Hamavlet has extensive stamping experience acquired over many years of manufacturing parts for different industrial applications.
Hamavlet's professional team of engineers and skilled production specialists is geared up to provide customized stamping solutions, specifically tailored to suit customer requirements. The provided services include die design and manufacture, engineering support and assistance during the transition to serial manufacturing, intricate die forming and blanking solutions, cost reduction in large series manufacturing using progressive dies, and more.
Stamping processes require an initial investment to design and manufacture the dies. The cost, the time and the great difficulty in making changes to the die, after its completion, often precludes stamping technology from being applied to product development efforts or small series manufacturing, therefore limiting its use for large series manufacturing purposes.
Stamping processes at Hamavlet
- Piercing: Cutting of apertures or punching (shaped holes, ventilation apertures and fastener holes) in a flat workpiece using a piercing die
- Cutting: Exerting cutting pressure perpendicular to the workpiece or raw material that causes the shearing thereof. Die cutting processes include: Blanking, trimming, shearing, notching, lancing, and preparation for bending
- Bending / forming: Creating a three dimensional shape in the workpiece by bending a metal sheet or strip in a die. Die forming maintains the raw material fibers and imparts rigidity to the product
- Hinge rolling: A stamping process in which the edge of the workpiece is bent to create a rounded finish for the insertion of hinges. Common uses: Door hinges for electronic packaging, armored vehicles and consumer products
- Embossing / coining: An imprinting process in which a shape or caption is impressed or raised on a metal strip or sheet, or other raw material, using a die. Common uses: Imprinting signage, trade marks, catalogue numbers, etc.
The stamping department at Hamavlet contains dozens of eccentric presses, from 15 to 150 tons of pressing force, various sized hand operated presses used for delicate pressing, a large guillotine to cut sheet metal and other CNC bending equipment. The wide range of presses enables Hamavlet to perform concurrent work on a single geometry (the manufacture of a large number of identical parts in a minimum period of time). Alternatively, it is possible to carry out continuous work on a part requiring a series of stamping operations, thus reducing the processing time for the finished product.
Hamavlet manufactures delicate and precision parts for different applications and industries using EDM wire cutting, which enables cutting parts at maximum precision and surface quality, in conjunction with delicate bending, in small presses, at an accuracy of up to 0.02 mm.
Progressive die cutting and forming
Compound die
A compound die executes a number of stamping operations in one press strike, for example: Blanking, piercing and shearing.
Progressive die
The execution of a number of consecutive stamping operations on a metal sheet or strip, using a single die. One or more operations can be carried out at every stage. The final shape of the product is obtained at the end of the stamping process, after undergoing all the required processing and shaping stages, such as: Piercing, shearing and bending.
Blanking
At the blanking stage, the perimeter of the product is cut from a flat material. A metal sheet or strip is cut into smaller units, as preparation for subsequent processing stages, such as: Bending, embossing or drawing. Frequently, blanking is combined with an additional punching or shearing operation and is carried out in a compound die.
Preparation of raw material
- Cutting of raw material strips to the desired dimensions in a guillotine
- Feeding a metal strip of the required thickness and width.