US2056321A

US2056321A - Die and method of making the same

Info

Publication number: US2056321A
Application number: US744559A
Authority: US
Inventors: Haumont Edmond
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1933-09-22
Filing date: 1934-09-18
Publication date: 1936-10-06
Anticipated expiration: 1953-10-06

Description

OctQ 1936. E. HAUMONT I DIE AND METHOD OF MAKING THE SAME Filed Sept. 18, 1954 2 Sheets-Sheet l Oct. 6, 1936. E. HAUMONT 2,056,321

DIE AND METHOD OF MAKING THE SAMEv Filed Sept. 18, 1934 2 Sheets-Sheet 2 Patented Oct. 6 1936 2,056,321 7 DIE AND METHOD OF MAKING THE SAME Edmond Haumont, Paris, France, assignor to United Shoe Machinery Corporation, Paterson,

N.'J., a corporation of New Jersey Application September 18, 1934, Serial No. 144,559 In France. September 22, 1933 8 Claims. (Cl. 76-107) Thisinvention relates to dies and-is herein .illustrated as embodied in a cutting die adapted to ,produce. shoe, part blanksirom sheet materialsueh; as leather.

One type ofE cutting-die which has come into use in the production. of shoe part blanks is one which comprises awblade bent to conform to, the outline of ashoe part blank and-having oppositely disposed cutting edges which can :be used in producing either right or left blanks of simislar sizes and shapes; It is an object of the present-invention to provide an improved cutting die of the type referred to which will be effective in its operation and whichat thesame time will b economical to manufacture. The cutting dies illustrated herein; which constitute preferred embodiments of the invention, each comprise two cuttingblades having contiguous or adjacent flangeatogether with means for securing the blades-together. Preferably and as shown, thetwo blades are welded together along the flanges to form an integral construction, but they may be held together or strengthened by two plateswhich engage the. flanges on the blades and are secured-in position by fastening devices extending through theplates. Dies constructed asabove outlined .arewell adapted to withstand the blowsto which they are subjected and, at the same time, the parts which make up the dies can bereadily assembled.

In another aspect, the invention relates to a method of producing cutting dies which consists inbending a flanged bladealong the edges of a pattern corresponding in outline to a blank to be produced, while maintaining the flange portion .of the blade inengagement witha face of the pattern and with the body portion of the blade 1 in'engagement with the edge portions of the pattern. jAsecond blade is similarly bent about the pattern utilizing the opposite face of the pattern ,as, a guidefor the flange portionoi the blade, and .the two. blades arev then assembled with their I flanged portions together to form a double-edged die. By bending the blades as above indicated about the pattern accuracy in forming the blade f sections *for producing closely corresponding blanks for right and left shoes, for example, is g' s '7." I

flvarious'other features and objects of the invention will be apparent from the following detailed specification when taken in connection with the Zaccompanyingdrawings and will be pointed out in'the claims. I

In the drawings, 7

pattern assembly;

Fig. 1 is a perspective view of a die illustrating "one embodiment ofthe invention;

Fig. 2 is a side view partly in section of the die shown in Fig. 1;

Fig. 3 is a perspective view of a die illustratin another embodiment of the invention;

Fig. 4' is a perspective view of a. pattern assembly which is used to form the dies;

Fig. 5 is a detailed view illustrating the step of bending one of-the blade Fig. .6 is a perspective view of the step of. bending the otherblade section about the pattern assembly; 7

Fig. '7 is a, side elevation partly in section of the die shown in'Fig. 3-; and

Fig.8 is a perspective view partly in section of a portion of one of theblades.

The die Ill-illustrated in Figs. land 2 comprises a double blade formed of two symmetrical blade sections-l2 and it having oppositely disposed cutting edges It and inturned flanges l8 which are clamped together by corevplates 20.

.Each of the bladesectionsis formed from, a strip 1 of steel such as strip 22 (Fig. 8), which is, L-.'

shaped in cross-section, one edge portion extending .at right angles to the body portion as a. flange 24, and the other edge portion being sharpened to form a cutting edge 26. Each of the blade sections corresponds in outline to that of a shoe.

.plates being held together by bolts 28, passing through alined openings in the plates, and nuts 30. The flanges .l 8 serve toimpartrigidity tov the double blade and stiffenit at the centraLportions thereof, thus preventing likelihood of the buckling of the blade underpressure applied to. one

or another of the cutting edges. This construction provides a reversible die which is rugged. but which at the same timercan be readilyassembled.

For producing gagefmarks upon blanks as they are cut from the die there are provided a pluralv l ty of stab members 32 each of which comprises a;

shank 34 of a thickness approximately equal to the combined thickness of the flanges N3 of the blade sections andhaving projectingtherefrom pointed portions 36 arranged to extend through holes 38 in the plates 26. When the die is assections about the sembled the shank portion 34 is positioned between the plates and the stab member is clamped in position by the bolts 28. Preferably, and as shown, the plates 20 are provided with openings 39 centrally thereof to facilitate the removal of cut blanks from the interior of the die. If desired, a cut-out die or punches or other blank ornamenting devices, not shown, can be secured in the openings 39, or held in position between the plates 20 in the same way as the stabs 32 are. held. The fact that the plates 20 are readily detachable facilitates the removal and assembly of such devices.

It is to be understood that the two blade sections l2 and I4 may be secured together by other means than the plates 2|] such as by welding the blade sections together along the .flanged portions thereof.

The modification illustrated in Figs.v 3 and '7.

comprises a die 40 having a core plate or stiffening .member 4|,upper and lower blade-

sections

42 and 44, similar in shape to blade sections |2 and M of. the die l0, and

havingfianges

46 and 48 which engage opposite sides of the plate 4|, the blade sections terminating in oppositely disposed cutting edges 50. In this instance the blade sections and plate are shown welded together at several points along the periphery of the die as indicated by reference characters 52.

' In constructing the die shown in Fig. 1 or that illustrated in Fig. 3 use is preferably made of a pattern assembly best illustrated in Fig. 4 and which. comprises a pair of

plates

54 and 55 which correspond in outline to the outline of a blank to be produced. These plates are held in spaced relation by means of bolts 56 which extend through alined openings in the plate and are secured by nuts 58, the plates being held apart by washers, one of which is shown at 60, so that the thickness of the assembly is approximately that of the body portion of a cutting blade section. By forming the pattern assembly in this manner, the necessity for a heavy plate is avoided thus -making for economy since thin plates of the required shape and size can be readily produced upon a pattern grading machine.

In forming the dies the blade sections are shaped separately. For example, in producing the die 40, the cutting blade section 44 is first shaped from a strip of material such as is shown in Fig. 8 which is first bent about the pattern assembly, as illustrated in Fig. 5, with the flange 48 in engagement with the upper face of the plate 54 and the body portion of the blade in engagement with the edges of. both plates. This serves to maintain the blade, as it is bent, perpendicular to the upper plate 54 with the result that the bending of the blade with its cutting edge substantially in one plane is assured, that is, the body portion of the blade will be maintained normal to the plane of the cutting edge as is necessary to produce a die which will be accurate.

The bending of the blade is continued until it has been bent entirely about the pattern assembly after which the ends of the blade are Welded together as indicated by reference-character 62. The cutting edge is then trued up using the plate-55 as a gage thus to make sure that the edge corresponds closely to that of. the pattern plate. The lower blade section is'thus completed and the pattern assembly is removed therefrom. It is to *be noted that in bending the blade section about corners of the pattern assembly it may be necessary to remove aportion of the flange. This is done by cutting a notch therein as shown' at sides of the stiffening plate 4|.

, together.

;assembling the

plates

54 and 55 with the

blade sections

42 and 44 positioned as shown in Fig. 7 with the flanges thereof contiguous on opposite The

plates

54 and 55 are then positioned upon opposite sides of the flanges 46..and.48 and when the bolts 56' are .tightened the plates will maintain the various parts in rigid position while the blade sections and stiffening plate 4| are welded together at various points along their peripheries as indicated by reference character-52. After the welding operation is completed the pattern assembly may be removed, or it may be retained as an additional stiffening means or asa support for blank marking or ornamenting devices. i :In the use of a die constructed as above described the die-is placed upon sheet material in a press with, for example, the left-blank cutting edge down and pressure is applied to the other edge-to force the die through the material. 'Whenit is desired to produce right blanks the die is merely reversed and the operation repeated.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A cutting die comprising two blade sections 'each of which has a body portion terminating in a'cutting edge and a flange portion in engagement with the corresponding flange portion upon the other section, and means for clamping the two flange portions together.

2. A cutting die comprising a core plate, blade sections disposed upon opposite sides of the plate and having each a flange in engagement with the plate anda body portion extending substantially at right angles to the plate terminating in a cutting edge, and means'for securing together the blade sections and core. a

3. A cutting die comprisinga blade shaped to correspond to the outline of a blank to be produced and-having a flange extending laterally from the blade, a second blade shaped to correspond to theoutline of a blank to be produced and having a flange-positioned contiguously to the first-mentioned flange, and means for securing the flanges together. a

4. A cutting diecomprising a plate the outline of which corresponds approximately to the outline of a blank'to be produced a cutting blade having a body portion terminating in a cutting edge and a flanged portion extending at right Eangles-to the body portion and in engagement with one'side of the plate along the edges therei of, a second cuttin lade having .a body portion terminating in a-cutting edge and a flange portion ex tending at right angles thereto located upon the plate on the opposite face thereof along the edge portions of the plate in alinement with the firstmentioned cutting blade, andmeans forpermanently securing the blades and plate 5. A cutting die comprising cutting members terminating in oppositely disposed cutting edges shaped to correspond to the outline-of blanks to be produced, two core plates positioned centrally of the cutting members, and a marking member having a shank portion located between the plates and work engaging portions extending outwardly of the shank portion through openings in the plates.

6. A method of producing cutting dies which consists in providing a pattern having edge portions corresponding in outline to those of blanks to be produced, bending a flanged cutting blade along the edge portions of the pattern with the flange in engagement with one face of the pattern, bending a second flanged blade along the edge portions of the pattern with the flange in engagement with another face of the pattern, and securing the two blades together with the flanges contiguous to each other.

7. The method of producing cutting dies which consists in providing a flanged cutting blade and a pattern corresponding to the outline of a blank to be produced, bending the blade along the pattern, utilizing the edge portions of one face of the pattern as a guide, bending a second blade along the pattern, utilizing the edge portions of the other face of the plate as a guide, assembling the two blades with their flange portions adjacent to each other, and welding the blades together.

8. A method of producing dies which consists in forming a pattern corresponding in outline to that of a blank to be produced, bending a flanged blade along edge portions of the pattern while maintaining the flange of the blade in engagement with one face of the pattern, bending a second flanged blade along the edge portions of the pattern while maintaining the flange of the second blade in engagement with the opposite face of the pattern, and permanently securing the flanges together.

EDMOND HAUMONT.