Abstract
This study focuses on quick plastic forming (QPF), product dimensional tolerances, and removal methods. The traditional curled metal shell mold in QFP, has limitations such as long process time and unstable quality. Therefore, this investigation designed a demolding mechanism, in order to improve the process efficiency and dimensional accuracy of QPF, in the manufacture of metal casings. The research results show that the proposed mechanism can significantly decrease the process time, because it replaces most of the operations of specimens movement after forming completely. The shorter process time reduce the die temperature loss during operation, thus also improving the efficiency by eliminating the need to wait for the die to return to its operation temperature. In terms of dimensional tolerance, the tolerance grade of QPF process was determined using the standard deviation, and found to be between IT10 and IT14. This range covers the scope of CNC cutting and stamping processing, indicating that the process has commercial value in the production of metal casings, because the current mainstream manufacturing process of metal casings comprises casting, stamping and CNC machining.
Highlights
Aluminum alloys have attracted considerable attention in recent year due to their possess light mass, high strength, easy recycling, and high corrosion resistance
Super Plastic Forming (SPF) technology has been successfully employed in the aerospace industry
The slow forming rate of aluminum has been found to be an obstacle to the use of SPF technology in applications, such as manufacturing aluminum car bodies, in the automobile industry, resulting in the developed and adoption of Quick Plastic Forming (QPF).[2,3]
Summary
Aluminum alloys have attracted considerable attention in recent year due to their possess light mass, high strength, easy recycling, and high corrosion resistance. Advances in Mechanical Engineering successfully produced vast quantities of auto-sheet products.[4] The authors recently applied QPF – Hot metal gas forming to make a shallow rectangular pan with curved peripheral edge in a cycle time of 40 s, with a minimum sheet thickness of 0.6 mm (for smart phone application).[5] some researchers have presented ‘‘two-stage gas forming’’6 or ‘‘mechanical drawing assisting gas forming’’ to enhance the production rate and/or thickness uniformity of sheet products.[7,8] In all those methods the product is obtained by blowing the sheet to fill the single die at a high temperature. A new mold (demolding mechanism), based on the existing mold design (Shallow rounded rectangular pan and open box) as a reference, and its accuracy and mass production efficiency were measured experimentally
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call