US2260370A

US2260370A - Die mechanism

Info

Publication number: US2260370A
Application number: US395509A
Authority: US
Inventors: Ferguson Allen Curtis
Original assignee: Glenn L Martin Co
Current assignee: Glenn L Martin Co
Priority date: 1941-05-28
Filing date: 1941-05-28
Publication date: 1941-10-28
Anticipated expiration: 1958-10-28

Description

Oct. 28, 1941. A. c. FERGUSON.

DIE MECHANISM Filed May 28, 1941 2 Sheeis-Sheet l Oct. 28, 1941. A. c. FERGUSON 2,260,370

DIE MECHANISM 2 Shets-Sheet? Filed May 28, 1941 Patented Oct. 28, 1941 L Allen Curtis Ferguson,

Lutherville, Md., assignor to The Glenn L. Martin Company, Baltimore,

Application May 28, 1941. Serial No. 395,509

6 Claims. (Cl. 16429) The invention relates to dies, and particularly I to dies for stamping blanks from sheet metal.

The primary object of the invention is to provide a simple and effective device of this nature.

A further object of the invention is to provide a die formed of two relatively -movable parts which can be pressed together to accomplish the cutting, in which one of the parts comprises a simple flat surface whilethe other carries all the working parts of the die.

Another object of the invention is to provide a die mechanism for striking successive blanks from a strip of material or from sheets thereof wherein the waste is cleared from the die automatically after each operation.

Still another object of the invention is to provide a die mechanism in which the sheet from which a blank is to be cut is held along its edges during the cutting operation,

An additional object of the invention is to produce a die having resilient means for separating the die and'punch and for clearing the waste from the punch after each operation.

Further objects of the invention will appear more fully from the following description, particularly when taken in conjunction with the accompanying drawings which form a part thereof.

In the drawings:

Fig. 1 is a bottom plan View of the upper element of a die mechanism embodying the invention.

Fig. 2 is a side view, partly in section along the line 2-2 of Fig. 1 and partlyin-elevation, of the mechanism.

Fig. 3 is a of Fig. 1.

The die mechanism includes two relatively movable parts, the lower part A constituting an partial cross section on the line 3-3 -anvil or base and the upper part B constituting amount or carrier for the die mechanism. The

base A has a flat upper surface 2, and is provided at its corners with holes 4 for receiving and guiding members to be described below carried by carrier 3.

The punch 6 having any suitable shape, such as that shown in Fig. 1, is secured by spot welding or other suitable means to the bottom of a plate 7. Mounted' in holes ID in the corners of carrier B are pins or posts I! having shoulders l3 which engage the plate 1 to hold it on the lower face of carrier B. These are held from dropping out by screws 14 threaded into the carrier and engaging downwardly tapered portions I6 of the posts. The lower ends of the posts have enlarged heads l8 which can move into holes 4 in anvil easily removable and replaceable, so that various A. The die 20having a hole therein of the same shape as punch 6 is guided at its corners on posts I2, resting on enlarged ends l8. Thick rings 22 of rubber, or some other suitable elastic means,

are provided around each post above the die 20, thus spacing this die from the carrier B and resiliently resisting its upward movement.

The punch 6 is surrounded by a sheet 24 of rubber or other elastic material which is cemented or otherwise secured on the lower face of plate 'I. This sheet fits closely around the whole periphery of the punch. Plate 1 and punch 6 also contain slightly pointed prick members 8 for making marks on the blank as a guide to further operation.

At each side the carrier has L-shaped guides 26 adjustably mounted .thereon by slots 28 and bolts 30.

This mechanism operates as follows:

A strip 32 of material to be punched, such as sheet metal; is fed into the space between die 20 and punch 6. The head or carrier B is then forced down on the anvil, by any suitable force- .exerting mechanism. When the die 20 engages the surface 2 of the anvil, it is'held stationary. Continued downward movement of the head now forces the punch 6 and rubber sheet 24 into engagement with the strip 32. Rubber 24 grips the edges of the sheet, while die 6 punches the blank from the metal through the die and thus stamps out a piece of the desired shape. At the same time, prick members 8 mark points on the blank at which further operations, such as punching, are to be performed.

When the pressure is released, the rubber rings 22 push the die away from the punch. At the same time, the rubber sheet 24 pushes the waste away from the punch and thus clears the punch. The strip can then be fed through until another blank can be punched therefrom.

Obviously the die, punch and rubber sheet are shapes can be produced on the same machine.

While I have described herein one embodiment of my invention I wish it to be understood that I do not intend to be limited thereby except with I in the scope of the appended claims.

I claim: 1..Die mechanism comprising an anvil having a smooth face, a carrier movable towards and from said anvil face, said carrier having a punch protruding from its face adjacent said anvil face, a die having an opening therein mating with said punch, means mounting said die on the carrier between the anvil and carrier'for movement towards and from the punch, resilient means urging said die away-from the punch, said die being normally spaced from the punch to allow the introduction of a body of material therebetween, said die being engageable with the anvil face to be moved over the punch when the carrier is moved towards the anvil to punch a. blank from such material.

2. Die mechanism comprising an anvil having a smooth face, a carrier movable towards and from said anvil face, said carrier having a punch protruding from its face adjacent said anvil face, resilient means outside the outline of the punch engageable by a body of material brought against the punch for normally urging such material away from the punch, a die having an opening therein mating with said punch, means mounting said die on the carrier between the anvil and carrier for movement towards and from the punch, resilient means urging said die away from the punch, said die being normally spaced from i the punch to allow the introduction of a body of material therebetween, said die being engageable with the'anvil face to be moved over the punch when the carrier is moved towards the anvil to punch a blank from such material.

3. Die mechanism comprising an anvil having a smooth face, a carrier movable towards and from said anvil face, said carrier having a punch protruding from its face adjacent said anvil face, posts protruding from the same face of the'car' rier, a .die having an opening therein mating with said punch and having holes slidably engaging said posts whereby said die is mounted on the carrier between the anvil and carrier for movement towards and from the punch, said die being engageable with the anvil face to be moved over the punch when the carrier is moved towards the anvil, said anvil having holes there-- in for receiving said posts.

4. Die mechanism comprising an anvil having a smooth face, a carrier movable towards and from said anvil face, said carrier having a punch protruding from its face adjacent said anvil face, posts protruding from the same face of the carrier, a die having an opening therein mating with said punch and having holes slidably engaging said posts whereby said die is mounted on the carrier between the anvil and carrier for movement towards and from the punch, rubber rings around said posts between the die and the carrier, said die being engageable with the anvil face to be moved over the punch when the carrier is moved towards the anvil.

5. Die mechanism comprising an anvil having a smooth face, a carrier movable towards and from said anvil face, said carrier having a punch protruding from its face adjacent said-anvil face, a sheet of rubber secured to the same face of the carrier closely surrounding said punch, posts protruding from the same face of the carrier, a diehaving an opening therein mating with said punch and having holes slidably engaging said posts whereby said die is mounted on the carrier between the anvil and carrier for movement towards and from the punch, rubber rings around said posts between the die and the carrier, said die being 'engageable with the anvil face to be moved over the punch when the carrier ismoved towards the anvil.

' 6. In a device as claimed in claim 5, said anvil having holes therein for receiving said posts.

ALLEN CURTIS FERGUSON.