When you operate an deep drawing hydraulic press, you would like to drive cost down material. Goodsjack is engaged in offering a wide range of Deep Drawing Hydraulic Press. We offered press machines are thoroughly tested on different stages by our quality examiners,in order to drive cost down material for our customers.Following are tips about how to cost down material.

1.  Calculate the blank size and optimize

One of the most common hidden costs for deep drawn parts is the hidden cost from engineered scrap necessary to procure a blank.  When the annual quantity for a particular part number is in the thousands or tens of thousands, custom coil sizes can sometimes be procured.  If not, blank material will normally come from master coil sizes, like 36″, 48″, 60″ or 72″ wide that are cut to width and the drop maintains more value.  If quantities are very low, it is common to produce blanks from standard sheet sizes of 8, 10, or 12 foot in length from the various coil widths.  Optimizing a blank to eliminate excessive amounts of engineered scrap or planned drops can dramatically impact final part cost.  Blank size also includes adequate amounts of material for trimming and work holding  to make the part shape.

2.  Design to minimize the material needed for trimming work holding

The blank size for the finished part is normally different from the actual blank that is used.  This is due to the method necessary to hold and process the part from start to finish.  Aside from the dimensional requirements, the required surface finish and tolerance of dimensions may require additional material to accommodate secondary processes or to eliminate features that could be permitted, yet are not specified on the drawing.

3.  Plan for thin out in the design phase

The material formed in the deep drawing process experiences tension and compression throughout the cycle of the forming process.  This means that typically, a section of the material will thin in one or more locations, normally towards the closed end of the shape.  Other sections will normally thicken towards the open end of the shape.  Allowing for this in the part design will help scrap remain low and the design to work well.

4.  Allow for a taper

Inherent to the process, due to the punch and die needing an adequate clearance, and to accommodate mill tolerance on metal thickness there is a taper in straight walls of parts.  The taper depends on the metal thickness, the total depth of the part, the grade of material, and the clearance between the punch and die.  Typical taper is between 0.005 to 0.010 of an inch per inch of depth.  In order to minimize taper; minimize part depth, use tooling designed specifically for the application, select materials with better form-ablity that thin less, and accommodate material flow with larger draw radius.  If tapers are not acceptable, secondary forming processes can reduce and sometimes eliminate the taper, however it tends to drive cost.

5.  Select material that has better ability to form

Selecting the most form-able material and temper for the draw process may minimize or even eliminate scrap generated during the drawing process.  This sometimes may be difficult if the application requires a certain amount of stiffness and or strength.  Some materials like stainless strain harden when formed and others like aluminum can be tempered to improve mechanical properties.  Sometimes selecting a superior material for the design that well exceeds the properties required by the design may be more cost effective in the long run because the processing costs may be significantly lower, such as drawing 304 stainless steel compared to 410 stainless steel.

6.  Look to use existing tooling

Many deep draw companies such as GOODSJACK, our engineers will available give the timely and sincere sugguestion  for customer reference.Like Goodsjack, a company that invests heavily in its own tooling can produce shapes that are very close to the designed dimensions. Sometimes, the design can be altered slightly to avoid an engineering charge.  Sometimes, a re-cut charge can be offered when the tool is no longer active and can be re-purposed.

7.  Hydro-mechanical deep drawing requires no die to be built

Hydro-mechanical deep drawing, or hydroforming uses hydraulic fluid as either a punch that pushes metal into a cavity or a die to push metal over a punch.  In hydro-mechanical deep drawing, a rubber bladder acts as a die with 1,000’s of PSI behind it to at a die.  Compared to metal die forming, the rubber bladder is better at applying lower amounts of stress onto the metal, thus allowing for greater reduction ratios and more elaborate part geometries.

8.  Uniform metal thickness is achieved by hydro-mechanical deep drawing (hydroforming).