Qingdao Yonglihao Machinery Co.,Ltd.
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Deep drawing metal stamping process
The deep drawing metal stamping process is a process performed in sheet metal forming through the mechanical action of the punch. Under uniform hydrostatic pressure, a flat metal plate blank is formed on a single rigid shape-defining tool half through a flexible rubber diaphragm.
Regardless of the thickness of the sheet or the complexity of the tool (including undercuts), the process will produce scratch-free parts. The higher molding pressure can ensure that the parts are directly compressed from the press, with little or no secondary manual work.
When the depth of the drawn part exceeds its diameter, the process is considered to be deeper. This is achieved by redrawing the parts through a series of molds.
The flange area (the sheet metal in the mold shoulder area) is subjected to radial tensile stress and tangential compressive stress due to material retention characteristics.
These compressive stresses, hoop stresses can cause flange wrinkles. These wrinkles can be prevented by using a blank holder whose function is to facilitate controlled material flow into the mold radius.
Deep-drawn metal stamping parts have the following advantages:
1. One-piece molding, no seams or welds, beautiful appearance
2. Use raw materials economically and reduce scrap rate
3. No high mold cost
4. Strict tolerances
5. Consistent part quality
6. Economical and suitable for mass stamping, and can be used for progressive stamping.
Deep drawing metal stamping forming method
Deep drawing also involves other forming methods and techniques in the press. These methods include:
Beading: Replace material to produce a diameter smaller or larger than the original diameter of the part.
Bottom perforation: cut a round or special-shaped metal part from the drawn part.
Protrusion: Forcing a part of the diameter of the part to extend from the original shape.
Imprinting: Displacement of material to form a specific shape in the component.
Curl: Roll the metal under the curl mold to form a curled edge. Squeeze: Once the pilot hole is created, the large diameter punch will pass through and cause the metal length to increase.
Ironing: thin the component wall.
Neck: Reduce the cross section of the part to a smaller diameter than the rest of the part.
Notch: Cut a notch in a circle, square or other shape at the open end of the part.
Rib forming: During the stretching process, the rib forming creates a rib protruding outward or inward on the part.
Side perforation: perforate the side wall of the drawn component. The shape depends on the specifications of the component.
Stamping: Most commonly used to add markings to parts, such as supplier names or product numbers.
Thread processing: Use rollers and arbor to form threads in parts.
Trimming: Cut off the metal needed to pull the part from the finished part.
Deep drawing metal stamping parameters
| Custom Sheet Metal Stainless Steel Deep Drawing / Drawn Stamping Parts | |
| Material | Non-ferrous alloy material like carbon steel,stainless steel,galvanized steel,aluminum,copper,brass,etc |
| Surface Finish | All kinds of surface treatment are available like chrome plating,zinc plating,nick plating,powder coating,e-coating,dip coating,mirror polishing,etc. |
| Application | Electronic/Appliance/Auto/Industrial equipment metal stamping hardware parts |
| Processing | Our process includes tooling fabrication,stamping,deep drawing,punching, spinning,laser cutting,bending,seamless welding,machining and assembly |
| Design | Customized designs are Accepted and Welcomed |
| Available Certificate | ISO 9001,SGS,Material Certificate |
| Accident Prevention | Safety Operation Management |
| Quality Control | Liability System and Periodical QC on line every hour |
| Main Market | USA/Germany/Canada/Italy/United Kingdom/Australia/Pakistan/French,etc |
Below is some questions you may want to know:
Questions: How to know the chemical composition of stainless steel deep drawing parts according to our requirements?
Answers: When we offer samples or batch parts, we will also send you our material list from our material factory, it shows more detailed.
Questions: How to guarantee your final size can meet our drawing request?
Answers: we will make moulds according to your 3D drawing. And we also do sampling when batch production start, to make assure the final dimension can meet your request.
Questions: How to make sure the color after painting or powder coating can be correct?
Answers: We have color card with different color number, such as RAL9016, we will contrast the sample surface and color card, to make sure the final surface effect is correct.
Questions: Generally, how do you packing the goods?
Answers: normally, for inner package: the goods is nude, for outer package: carton + plywood. If you have special request for inner or outer package, pls indicate it when you send us new inquiry.
Questions: If we find the defect products exist in the batch parts, how to do?
Answers: Yes,your caution is very good, in fact, when batch production, we need do sampling. Before shipment, we also do testing to make sure the quality is ok. If you found several defect product exists, pls take photos and send your quality feedback, we will check and send you quality products. But pls be assured that our products is qualified, unless caused by the worker's mistake to place.