+ All Categories
Home > Business > Flashless Forging

Flashless Forging

Date post: 25-May-2015
Category:
Upload: peter-columa
View: 3,592 times
Download: 9 times
Share this document with a friend
Popular Tags:
13
Flashless Forging Lalaguna, Rachel C.
Transcript
Page 1: Flashless Forging

Flashless Forging

Lalaguna, Rachel C.

Page 2: Flashless Forging

Flashless Forging

• "true" closed die forging in which metal deformed in a die cavity permits virtually no excess metal to escape.

• Carried out in an elevated temperature which in between cold and hot forging.

• Warmed work piece is compressed between a punch and a die having the shape of the compressor scroll or balance plate until deformation occurs.

Page 3: Flashless Forging

flashless forging imposes requirements on process control that are more demanding than impression die forging . most important is that the work volume must equal the space in the die cavity within. Very close tolerance if the starting blank is too large excessive pressures may cause damage to the die or press. if the blank is too small, the cavity will not be filled because of the special demands by flashless forging . the process lends itself best to part geometrics that are usually simple and symmetrical and to work materials such as a precision forging process.

Page 4: Flashless Forging

application

Page 5: Flashless Forging

• . The process is used to produce a near-net or net shape forging. The dies make no provision for flash because the process does not depend on the formation of flash to achieve complete filling. Actually, a thin fin or ring of flash may form in the clearance between the upper punch and die, but it is easily removed by blasting or tumbling operations, and does not require a trim die. The process is therefore called "flashless forging", and is sometimes called "enclosed die forging".

Page 6: Flashless Forging

Application

Page 7: Flashless Forging

 Advantages of flashless forging

• Part produced is more ductile.• Higher strength.• Higher production rate.• Little or no material is wasted.• Produced part are in net shape.

Page 8: Flashless Forging

disadvantage

• Higher tooling cost due to complex die shape.

Page 9: Flashless Forging

With flash Flashless

Page 10: Flashless Forging

figure 19.17flashless forging (1)just before initial contact with work piece, (2)partial

compression, and (3)final punch and die closure. Symbols v and f indicate motion(v=velocity) and applied force respectively

• coining is of course in the minting of coins shown in Figure 19.18. The process is also used to provide good surface finish and dimensional accuracy on workparts made by other operation.

Page 11: Flashless Forging

FIGURE 19.18Coining operation (1) Start of cycle(2) Compression Stroke (3) Ejection of

Finish part

Page 12: Flashless Forging

Application

Page 13: Flashless Forging

Thank you!


Recommended