Method of making rotary cutting dies

Metal tools and implements – making – Blank or process – Die

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

761078, B21K 520

Patent

active

055751857

ABSTRACT:
A method of making a pair of rotary die cylinders with lands having coacting cutting edges which cut blanks from a web of material passing through the nip of the rotating dies. In cross section each land has an outer face and a pair of spaced apart side faces which are parallel to each other and perpendicular to the chord of the outer face to provide a clean cut and facilitate release of the cut blank from the cutting blades as it emerges from the nip of the dies. The die cylinders are journalled for rotation by recesses with frusto conical locating surfaces in their opposed ends. Each die cylinder is made by machining the recesses in the opposed ends of a generally cylindrical workpiece of tool steel and then utilizing the recesses to locate and orient the workpiece relative to a cutting tool to produce a cylindrical surface on the workpiece concentric with the axis of the recesses and then to machine away portions of the periphery of the cylindrical surface to form the cutting blade lands thereon. After machining is completed the cutting blade lands may be hardened by heat treating utilizing a laser beam directed onto the lands to heat them at an elevated temperature so that upon quenching they are hardened without any substantial hardening and resulting distortion of the core or body of the workpiece.

REFERENCES:
patent: 1110238 (1914-09-01), Spiegel
patent: 3322012 (1967-05-01), Murray
patent: 3485146 (1969-12-01), Sarka
patent: 3512431 (1970-05-01), Caja
patent: 3550479 (1970-12-01), Pfaff, Jr.
patent: 3578761 (1971-05-01), Sarka
patent: 3895947 (1975-07-01), Sarka
patent: 4224851 (1980-09-01), Imai
patent: 4561334 (1985-12-01), Sarka
patent: 4597317 (1986-07-01), Heyden
patent: 4608895 (1986-09-01), Bell
patent: 4770078 (1988-09-01), Gautier
patent: 5067380 (1991-11-01), Seefeldt

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method of making rotary cutting dies does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making rotary cutting dies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making rotary cutting dies will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-533240

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.