US2275706A

US2275706A - Die set and template mounting

Info

Publication number: US2275706A
Application number: US300782A
Authority: US
Inventors: George F Wales
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-10-23
Filing date: 1939-10-23
Publication date: 1942-03-10
Anticipated expiration: 1959-03-10

Description

March 10, 1942. WALES 2,275,706

DIE SET AND TEMPLATE MOUNTING Filed Oct. 25, 1939 3 Sheets-Sheet l In null M'IWHIWI 'IWIIIH H 111; 1

Fig. 4 INVENTOR.

aa zzw March 10, 1942. G. F. WALES 2,275,706

DIE SET AND TEMPLATE MOUNTING Filed Oct. 23, 1939 5 Sheeis-Sheet 2 LVVENTOR Fig.6 a

March 10, 1942. G. F. WALES DIE SET AND TEMPLATE MOUNTING 3 Sheets-Sheet 5 Filed 001:. 23, 1939 w m m m fl fA/we/ Patented Mar. 10, 1942 UNITED STATES PATENT OFFICE DIE SET AND TEMPLATE MOUNTING George F. Wales, Kenmore, N. Y. Application October 23, 1939, Serial No. 300,782

24 Claims.

My invention relates to a die set and plate mounting which is more particularly intended for use in stamping presses, press brakes and similar machines although the same may be employed advantageously in other installations.

In the metal stamping industry, a die set is an assemblage of the two main shoes or holders which form a part of a finished die assemblage, the shoes or holders being held in alignment with one another by guide posts or liner pins firmly assembled to the one shoe while the other has bearings which slide on the posts as the holders move toward and away from each other. The upper part of a die set is called the punch holder, the lower part is called the die holder or shoe and the posts which keep them in alignment are called guide posts. Die sets are now a standard commodity and are purchased by the user in the above condition after which he makes whatever cutting, forming, embossing, punching or other type of implements he desires and mounts them permanently in the die set, usually mounting an implement called the punch to the punch holder and an implement called the die to the die holder, said die being mounted so as to cooperate with the punch.

This assemblage which in its completion is usualy also called a die and which is herein referred to as a die assemblage, is then ready to be set into the stamping press, press brake or Whatever similar machine is to do the work. These machines all have the characteristics of having a stationary bed and a movable ram whichis caused to move toward and away from the bed. To the bed of the press, the die holder of our conventional die set is attached and to the ram the punch holder is firmly attached so that the movement of the ram causes the punch holder to slide up and down while guided by the guide posts or liner pins in the die holder and the work is performed at the bottom of the stroke of the press when the punch and die implements cooperate.

It has up to the present time been the practise to mount the punch and die implements in the die set as explained above, there being an individual complete assemblage which performed only the work it was made for. Thus, for every operation to be performed, new die sets have been used and diflerent implements mounted permanently in them. These are caled single purpose dies.

It has, heretofore, been the custom to build single purpose dies for practically every operation which had to be performed on a stamping. The

die assemblages are expensive to design and make, expensive to handle in and out of the press, and cumbersome and expensive to store when not in use. Investments of considerable sums are tied up in die assemblages of this con structlon.

Certain die sets have been made, however, where independent individual dies and punches have been capable of being arranged and rearranged to perform operations on various sheets of material. These assemblages have the disadvantage of being cumbersome to set up and so much'time is consumed locating each unit in its proper relation to other units that its general usefulness is ruined. The chief objection to this type of die assemblage is that after one operation has been performed on all of the pieces comprising the run, the press must remain idle until the individual punch and die units have been re-arranged and made ready for the next operation. The expense entailed by making the press remain idle during the operation of setting these individual units is almost prohibitive.

There is obviously a need therefore for an apparatus which is economical to make, which can be set up in a press without causing prohibitive delays and one which is eflicient in its purpose and novel in its construction.

In accordance with this invention, I employ a die set of conventional design for a press, comprising a lower die holder mounted on the bed of the press and an upper punch holder mounted on the under side of the reciprocating ram, said upper and lower parts being caused to move toward and away from each other in perfect alignment either by the construction of the press or by guide posts pressed into the lower part and projecting upward through bushings in the upper part but I add to such die set the features'enumerated in this application.

One object is to provide a die set which can be installed in a press and allowed to remain there and to provide means for installing in the die set while it is in position in the press, plates or templates which carry the punch and die parts or implements which are to perform the work.

Another object is to so organize the making templates of improved and simplified form which may be drilled, reamed, or otherwise prepared. together, making it unnecessary except in unusual cases to prepare them separately.

An additional object is to provide plates having locating points such as one or more edges either alone or in combination with one or more dowel pins so that when the upper plate is attached to the under side of the punch holder which is already in the press all holes or implements attached to said plate will line up perfectly with all corresponding holes or implements attached to the lower plate when it is attached to the die shoe of the die set which is already in the press.

A further object is to provide means in the punch holder so that the upper plate can be slid into accommodating ledges so that the plate will be held loosely to the punch holder before being tightened in place.

Another object is to provide means for adjusting the templates after they have been placed in the die set and before tightening.

Another object is to provide in the die set shoe a novel system of adjustable gauges and stops for the work.

Another object is to provide means for locating in the templates, when first starting to lay out a pattern of holes, locating holes which will engage with pilot pins in the punch holder and shoe of the die set thus assuring that the upper template and lower template will be in perfect alignment.

Another object is to provide a die set having changeable templates on which the same implements are interchangeably mounted so that instead of having a large investment of single purpose dies the manufacturer can reduce his investment considerably by merely storing the templates and having a minimum number of die sets. 7

Another object is to provide a simple means for making certain that the punch and die implements are in perfect alignment with one another. I 1 [rel] These objects and the several novel features of the invention are hereinafter more fully described and claimed and the preferred :form of construction by which these objects are attained is shown in the accompanying drawings, in which-- Figure 1 is a fragmentary perspective view of a die set shown resting on the bolster plate of a stamping press and ready to be attached to the ram of the press which is not shown.

Figure 2 is a perspective view of the two plates to be made into templates on which die implements are to be mounted.

Figure 3 is a perspective view of the two templates bolted together so that the drilling and reaming operations will be identical in both templates.

Figure 4 is a perspective view of the two templates which have been drilled and reamed for the locating pins of the punch and die members.

Figure 5 is a fragmentary perspective View of the die set shown in Figure l but with the punch template in position in the punch holder and the die template in position in the die shoe holder.

Figure 6 is a fragmentary perspective view of the punch template with a punching device 10- cated by means of its pilot engaging one of the holes of a template formed in Figure 3 and the die template with the companion die located by means of its pilot engaging the hole which resulted in the die'template when the hole was drilled and reamed in the punch template. I also show a fragmentary work piece resting on the I die and a gauge or stop for locating the piece in its proper relation to the dies.

Figure 7 is a fragmentary view of the punch implement or unit resting on its companion die unit and showing a ring around the die and stripping member which checks alignment of the punch and die hole and is removed when the die tion of the die template after it is placed in the die shoe.

Figure 10 is a fragmentary cross section of the punch holder showing means for locating a template to thepunch holder and means for bolting the template tightly to the punch holder.

Figure 11 is a perspective view of the die shoe shown in Figures 1 and 5 showing adjustable gauging stops against which the work piece is located so that the operations will be performed in proper relation toj'the edges of the work. A fragment of one of these gauging stops is shown in Figure 6.

Figure 12 is a fragmentary perspective view of an angle gauge mounted on a die template.

Although this invention is capable of use in various installations the same is shown in the present case in the drawings as used in connection with stamping presses of the kind commonly used for blanking, piercing, trimming, punching, notching and forming sheet metal.

It is obvious that the type of punching die assemblage shown in the drawings is for illustration of one use of my invention and I intend that all other forms of devices employed in presses for operation upon sheet metal and other sheet materials be included.

In the following description similar characters of reference indicate like parts in the several figures of the drawings.

In Figure 1 numeral l0 represents the lower portion of a stamping press showing the columns which support the upper part of the press including the reciprocating ram to which punch holder 13 of a die set is attached so that the same becomes substantially a part of the press. Tightly fastened to the lower portion! of the press is a bolster plate ll to which the die shoe l2 of the die set is tightly fastened by any conventional means such as shown by bolts l4, so that the die shoe also becomes substantially a fixed part of the press. The numeral l5 represents the liner guide posts or pins which are fastened to the die shoe l2 and guide th, punch holder l3 in perfect alignment to the die s oe.

In Figure 2 the plates which are to be made into a punch template l6 and a die template H are prepared by making them both the same size and seeing that the edges i8 and I9 are square with the front edges 20 and 2|. The plates are then placed together and squared so that the edges are in the same plane, in which state they are clamped or bolted together as at 24, Figure 3, so as not to shift on one another. After the locations are determined for pilot holes, the holes are drilled and reamed through both plates making them identical so that when they are separated they appear as shown in Figure 4. In the first instance in Figure 3 with the plates bolted together we shall consider that only holes 2-2 have been formed in the two plates and in Figure 4 these holes are designated by the nupunch plate and m, in the die punch implements to the under side 2| of the punch template I8 and the corresponding die implements to the upper side 22| of the die template II. In mounting the punch implement to the punch template I! Figure 6, the template is placed upside down and a pilot 23 on the punch implement and coaxial with the punch is inserted in pilot hole 22a. The flanged outer housing 23aof the punch implement is then fastened to the punch template, as shown in Figure 6 by some means such as bolts 25.

Likewise, the die implement of the apparatus is located by means of pilot 21 coaxial with the die. which is inserted in the hole 2222 which is the companion of hole 22a. The flanged outer housing 26 of the die implement is fastened to the die template by some means such as bolts 23.

If many similar devices are to be used repeatedly, a drill jig may be used to prepare the attaching holes 26' in the templates, the jig being also located by means of a pilot engaging the pilot hole and having drill guiding holes properly spaced.

In the same manner gauging stops 2! shown in Figure 12 may be applied to die template I! for the purpose of locating the work 30.

The templates as shown in the drawings are made of sumcient thickness to properly support the punch and die implements and to hold the fastening bolts or screws" and 28, but should be light enough so that they can be easily handled and stored. The use of relatively thin plates is made possible by the fact that the locating or pilot holes in the templates are only for the purpose of correctly locating the pilot pins of the punch and die implements. The supporting of the implements with their axes perpendicular to the templates is effected by securing the flat faces of the flanged portions of these implements to the adjacent faces of the templates, for example,

by the

bolts

25 and 23. This construction also makes it possible to easily remove the punch and die implements from one pair of templates, so that they can be secured to and used on another pair of templates.

The two templates are now ready to be placed in the press which means that the punch implements have been properly assembled to the punch template l6 and the die implements including any gauging stops 29 or other details have been properly assembled to the die template.

The die template assemblage is now placed in its ways 32 of the die shoe i2 and slid back into the shoe until it engages a fixed stop. The template is then adjusted to its desired position by means of screws 34 which engage gibs 35 at both ends of the plate after which the template is fastened firmly in place by means of bolts 36 extending through the plate and into tapped holes in the shoe.

The punch template assemblage is then placed in its ways or rails 3| of the punch holder I3 and slid back until it engages a stop directly above the one which located the die template in 3 the die shoe. This template is then adjusted by means of screws 34 until it is in its proper relation to the die template after which it is fastened tightly to the punch holder. To make sure that all of the implements are located properly a locator such as sleeve ring 33,. Figure 'l is placed around a cylindrical die member "I and the ram of the press lowered until a stripping member 33 enters the opening in ring 33. Since the die member 43 and stripping member 39 are of the same diameter and fit snugly within the ring 33, then if the stripping member 33 enters the ring 38, the punch and die implements are in proper alignment. If it does not enter then adjustments are made by means of screws 34 causing the template I 6 to shift until two such locators engage properly after which the template is bolted tightly in place on the punch holder and the assemblage is ready to go into operation. If a template has more than three punches or dies, then preferably three pairs of punches and dies are supplied with rings 38, and if three punches enter three rings, then the templates are accurately spaced relatively to each other.

Following is a description of an alternative method of locating the templates in the die set accurately.

In this method the ledges 3| and 32 may be done away with and the upper face of the die shoe and the lower face of the punch holder made flat as is shown in Figure 8. r

Instead of having means for adjusting the templates such as is shown in Figure 9, I locate the template in the die set by means of dowel pins lid and lib which are accurately spaced and in direct relation to one another and which engage the holes 23a and 230, Figure 4 which are bored as shown at 23 in Figure 3. Of course, the pins may be removable, or be part of the templates in which case a hardened bushing 42, Figure 10 would be provided to avoid wear.

In using this method of locating the templates in the die set it is essential that the holes 23 are very accurately located. Therefore. a drill jig with hole locating bushings is provided which is used for drilling, reaming, or boring these holes in the templates. The same drill jig is also used to form the holes in the punch holder and die shoe of the die set, these parts being closed toether and drilled together in much the same manner as the templates.

After the templates are prepared in this manner, the implements are assembled in place and the punch template is placed in the punch holder. A number of means may be provided to facilitate placing the punch template in position but I show in Figure 8 two extending tracks 46 on which the template may be placed and slid back to its approximate position after which the locating dowels may be inserted and the template bolted tightly in place as by bolts 36.

After the die template assemblage is placed in the die shoe and located properly, by means of dowels, the setting is checked by some means such as ring 38 Figure 7 and the apparatus is ready for production.

As all shapes of flat and flanged pieces within the capacity of the apparatus may be operated upon it is necessary to provide a means for 10- eating the pieces in proper relation to the edges of the piece. For this purpose I provide slots 43 in the die shoe l2 to which I attach

gauge bars

44 and 45 by means of bolts which may be adjusted and clamped any place within the slot.

, the tyfp If desired,bar 44 may be drilled and tapped at intervals along its length to accommodate bolts for holding adjustable stops 49 in place.

In the above specification I have described one form of my invention, but it will be understood that the same is capable of further modification without departing from the spirit and scope of the invention as defined by the following claims.

For instance, the punch template assemblage may be bolted in place to the punch holder 41, Figure 8, without using either of the foregoing methods for locating in which case the die template assemblage is placed on the die shoe l8 and the die implements aligned with the punch implements by some means such as two or more rings 38 after which the die template is bolted tightly to the die shoe with rings 38 in place. The rings are then removed and the apparatus is ready to run.

Or, the punch template assemblage and die template assemblage may be placed together with locator rings 38 in place and placed in the press in this condition in which case the die template is first clamped tightly to the shoe. The ram of the press is then set to its proper shut height and lowered to engage the punch template which is then bolted tightly to it.

By means of the construction described, any number of punches and dies may be easily secured to the templates, to produce the work desired. All of the punches and dies are removably secured to the templates, and after thedesired number of parts have been made, the templates are;-removed from the punch holder and die shoe. The punches and dies can then be removed from the templates and used on other templates or for other work. The templates can then 'be easily stored,. since, they occupy comparativelyi little spaceand since the templates are also easily andflir expensively made, avery materialssaving'in' ith'e cost of a die assemblage is made. When more pieces of the same kind are again; -required, punches and dies can again and accurately secured on the templa es. chesfand diesmay, for example, be of {shown in my Patent No. 2,168,377, or they" maybe of other construction. For any piece *of-work'requiring a number of accurately positioned holes, it is, consequently, only necessary to make a pair of templates, which are preferably identical, and to removably mount standard punches and dies thereon, thus saving the cost of an expensive die set, such as heretofore employed for producing such work.

I claim as my invention:

1. A die assemblage for use on a press having a stationary member and a member movable toward and from said stationary member, said die assemblage including a plurality of cooperating punch and die parts, a template having locating means thereon for accurately positionon said template and a cooperating partto position said parts into correct operative relation to each other and to the other member of the press, and means for securing said cooperating part to said other member of a press while being,

positioned by said locating device.

2. A die assemblage for use on a press having a stationary member and a member movable toward and from said stationary member, said die assemblage including a plurality of cooperating punch and die parts, a template having locating means thereon for accurately positioning some of said parts in correct spaced relation to each other, means for securing said parts in their correct relation whilepositioned by said locating means, means for securing said template on one member of a press, a cylindrical alining device adapted to engage a part secured on said template with a cooperating part to aline said parts, and means for securing said cooperating part to a member of a press while held by said alining device in alinement with a part which is secured to said template.

3. A die assemblage for use on a press havin a stationary bed and a reciprocating ram, said assemblage including a pair of similar apertured templates, each having the apertures therein located in the same relation to each other and to the template, one of said templates having a plurality of punches removably mounted thereon and the other template having a plurality of dies removably mounted thereon to cooperate with the punches of said first template, pilot pins coaxially positioned on said punches and dies and adapted to enter into said apertures of said templates for correctly positioning said punches and dies on said templates, and means operable from those faces of said template on which said punches and dies are mounted for securing said punches anddies to said templates after they are properly positioned thereon by said pilot pins.

4. A die assemblage comprising a die set including a punch holder and a die shoe mounted to move toward and from each other in correct alinement, said die assemblage including a pair of similar templates, each having similar apertures therein located in the same relation to each other and to the template, punches removably mounted on one of said templates, dies removably mounted on the other template for cooperation with said punches, said punches and dies having apertures in the portions thereof arranged adjacent to said templates, said apertures being coaxial with said punches and dies, pilot pins cooperating with said apertures in said templates and in said punches and dies for correctly positioning said punches and dies on said templates, and means independent of said pilot pins and arranged eccentrically of said pilot pins for releasably securing said templates to said punch holder and die shoe in correct operative relatio to each other. a

5. A die assemblage including a die set having a punch holder and a die shoe mounted to move toward and from each other in correct alinement, said die assemblage including a pair of similar templates having similarly located apertures therein, punch implements each having one end formed to penetrate the work and an aperture in the other end coaxial therewith, dies each having one end thereof apertured for cooperation with a punch and having an aperture in the other end thereof coaxial with the aperture in said first end thereof, pilot pins cooperating with apertures in said templates and in said punches and dies for correctly positioning said punches and dies on said templates, means independent of and eccentrically arranged with reference to said pilot pins for releasably securing said' punches and dies to said templates while the same are positioned on said templates by said pilot pins, and means for releasably securing said templates to said punch holder and die shoe in correct operative relation to each other.

6. A die assemblage for use in a press having a stationary bed and a reciprocatory ram, said assemblage comprising a die set including a punch holder shoe and a die shoe, which are formed for rigid mounting on said ram and bed and which are provided with, means for guiding said shoes for accurate movement toward and from each other, a pair of templates, punches mounted on one of said templates and dies mounted on the other template for correct cooperation with said punches, means for temporarily and adjustably supporting a template on one of said shoes, means on said shoe for engaging an edge of the template to adjust the template in a direction transversely of the axes of the punches and dies while said template rests on its supporting means, for accurately alining said punches and dies, and releasable means for rigidly securing said templates to said shoes when in their correctly adjusted positions.

'7. A die assemblage according to claim 6 characterized in that the adjusting means comprises screws extending through tapped holes in one of said shoes and engaging edge portions of the template supported on said shoe for adjusting the same laterally of the axes of the punches and dies to aline said punches and dies.

8. A die assemblage for use in a press having a stationary bed and a reciprocatory ram, said die assemblage including a die set having a lower shoe rigidly mounted on said bed, an upper shoe rigidly mounted on said ram, means for guiding said shoes to move toward and from each other, a pair of templates, punches mounted on one of said templates and dies mounted on the other template for cooperation with said punches, means on said shoes for correctly positioning said templates thereon, so that the punches on one template are in coaxial alinement with the dies on the other template, means for rigidly and releasably securing said templates to said shoes with said punches and dies in coaxial alinement, and gaging means mounted on the template secured on said lower shoe and including a stop positioned to be engaged by the work for correct- 1y locating the same with reference to said punches and dies, and adjustable means for securing said gaging means in correct relation to said template mounted on said lower shoe.

9. A die assemblage for use in a press having a stationary bed and a reciprocatory ram, said die assemblage including a die set having a lower shoe rigidly mounted on said bed, an upper shoe rigidly mounted on said ram, means for guiding said shoes to move toward and from each other, a pair of templates, punches mounted on one of said templates and dies mounted on the other template for cooperation with said punches, means on said shoes for correctly positioning said templates thereon, so that the punches on one template are in coaxial alinement with the dies on the other template, means for rigidly and releasably securing said templates to said shoes with said punches and dies in coaxial alinement, and gaging means on said lower shoe including stops positioned to be engaged by the work for correctly locating the same with reference to said punches and dies, said lower shoe having T-slots formed therein, and bolts cooperating with said T-slots and adjustable therein to hold said stops on said lower shoe in position to be engaged by the work for correctly positioning the work with reference to said punches and dies.

10. A die assemblage for use on a press having a stationary member and a member movable toward and from said stationary member, said die assemblage comprising a die set including a plurality of cooperating punch and die implements, a pair of templates having identically positioned locating means thereon and on which said punch implements and said die implements are mounted in correct spaced relation to each other, means for securing one of said templates on a member of the press, a plurality of locating devices adapted to be applied simultaneously to a plurality of cooperating punch and die implements of both said templates for positioning said punch and die parts in correct axial alinement with each other and thereby positioning said templates in correct relation to each other, and means for rigidly securing the other template to its press member when the same has been correctly positioned by said locating devices.

11. A die assemblage for use in a press having a stationary bed, and reciprocating ram, comprising a die set having a lower shoe adapted to be rigidly mounted to said bed, an upper shoe adapted to be rigidly mounted to said ram, and means for causing the two shoes to operate in alignment, a pair of templates detachably mounted, one under said upper shoe, the other upon said lower shoe, a plurality of punch and die implements each including a part adapted to act on the work and a laterally extending portion having a surface extending perpendicular to the axis of said part, and means engaging said laterally extending portions for securing said implements to said templates, said punch and die implements having their perpendicular surfaces secured to the adjacent faces of said upper and lower templates to position said punch implements in axial alignment with said die implements.

12. A die assemblage for use in a press having a-stationary bed and reciprocating ram, comprising a die set having a lower shoe adapted to be rigidly mounted to said bed, an upper shoe adapted to be rigidly mounted to said ram, and means for causing the two shoes to operate in alignment, a pair of templates detachably mounted, one under said upper shoe, the other upon said lower shoe, a plurality of punch and die implements each including a part adapted to act on the work and a laterally extending portion having a surface extending perpendicular to the axis of said part, cooperating parts on said templates and on said punch and die implements for correctly positioning said implements on said templates, and means engaging said laterally extending portions for securing said implements to said templates, said punch and die implements having their perpendicular surfaces secured to the adjacent faces of the upper and lower templates to position said punch implements in axial alignment with said die implements..

13. A die assemblage for use in a press having a stationary bed and reciprocating ram, comprising a. die set having a lower shoe adapted to be rigidly mounted to said bed, an upper shoe adapted to be rigidly mounted to said ram, and means for causing the two shoes to operate in alignment, a pair of templates detachably mounted, one under said upper shoe, the other upon said lower shoe, a plurality of punch and die implements each including a part adapted to act on the work and a laterally extending portion having a surface extending perpendicular to the axis of said part, identically located parts on said templates adapted to cooperate with corresponding parts on said punch and die implements to correctly locate said implements on said templates, and means on said implements independent of said corresponding parts thereof for securing said implements on said templates after said implements are located on said templates.

14. A die assemblage for use in a press having a stationary bed and reciprocating ram, comprising a die set having a lower shoe adapted to be rigidly mounted to said bed, an upper shoe adapted to be rigidly mounted to said ram, and means for causing the two shoes to operate in alignment, a pair of templates detachably mounted, one under said upper shoe, and the other upon said lower shoe, a plurality of punch and die implements each including a part adapted to act on the work and a laterally extending portion having a surface extending perpendicular to the axis of said part, identically located parts on said templates adapted to cooperate with corresponding parts on said punch and die implements to correctly locate said implements on said templates, means on said implements independent of said corresponding parts thereof for securing said implements on said templates after said implements are located on said templates, and :means for "accurately locating said templates in correct superimposed relation to each other on said shoes of said die set before mounting said templates thereon.

15. A die assemblage for use in a press having a stationary bed and reciprocating ram, comprising a die set having a lower shoe adapted to be rigidly mounted to said bed, an upper shoe adapted to be rigidly mounted to said ram, and means for causing the two shoes to operate in alignment, a pair of templates detachably mounted, one under said upper shoe, the other upon said lower shoe, a plurality of punch and die implements each including a part adapted to :act on the work and a laterally extending portion having a surface extending perpendicular to the axis of said part, identically located parts on said templates adapted to cooperate with corresponding parts on said punch and die implements to correctly locate said implements on said templates, means on said implements independent of said corresponding parts thereof for securing said implements on said templates after said implements are located on said templates, and means for adjusting said templates relatively to each other and to said shoes of said die set for positioning said punch implements in correct axial alignment with said die set before mounting said templates on said shoes of said die set.

16. A die assemblage including a pair of templates for mounting on two relatively movable members of a press, said pair of templates having a plurality of identically located positioning holes therein, a plurality of sets of punch and die implements having parts cooperating with said holes in said templates for accurately locating the punch implements on one template in correct positions relatively to the die implements on the other template, said implements having laterally extending parts with flat faces perpendicular to their axes and adapted to be placed in contact with the adjacent flat faces of said templates to support said implements, after location of the same on said templates, with the punch and die axes in alignment, and means for securing said laterally extending parts to said templates to releasably hold said implements thereon.

17. A die assemblage including a pair of templates for mounting on two relatively movable members of a press, said pair of templates having a plurality of identically located positioning holes therein, said templates being made of flat plates of a thickness not materially greater than the diameters of said positioning holes therein, a plurality of sets of punch and die implements I having parts cooperating with said holes in said templates for accurately locating the punch, and die implements on said templates, and means independent of said holes for securing said punch and die implements to the adjacent faces of said templates for supporting said implements thereon with the axis of each implement perpendicular to its template.

18. A die assemblage including a pair of templates for mounting on two relatively movable members of a press, said pair of templates having a plurality of identically located positioning holes therein, a plurality of sets of punch and die implements having parts cooperating with. said holes in said templates for accurately locating the punch implements on one template in correct positions relatively to the die implements on the other template, and means independent of and spaced eccentrically with relation to said holes in said templates and of said parts on said implements for securing said implements to said templates with their axes perpendicular to the adjacent faces of said templates.

19. The combination of a punch implement having a punch and a sleeve arranged about the work engaging end of the punch, and having a cylindrical portion which is concentric with the axis of said punch, a die implement including a die adapted to cooperate with said punch, said die implement having a cylindrical surface concentric with the axis of said die, and a locator sleeve having a cylindrical surface adapted to simultaneously engage said cylindrical surfaces of said punch and die Jim-plements when said punch and said die are axially aligned.

20. The combination of a punch implement having a punch mounted therein for axial movement and having a stripper arranged about said punch and provided with a cylindrical outer surface concentric with said punch, a, die implement including a die adapted to cooperate with said punch and having an outer cylindrical sur-' face concentric with the axis of said die, and a locator sleeve having an internal cylindrical surface'adapted to fit snugly about said cylindrical outer surfaces of said stripper and said die to axially align said punch and said die.

21. The combination of a punch implement having a punch and a cylindrical part arranged about the work engaging portion of said punch and concentric with the axis of said punch, a die implement including a die and having a cylindrical surface extending coaxially with said die about the work engaging portion thereof and of the same diameter as said cylindrical part of said punch implement, and a locator sleeve having a cylindrical surface adapted to snugly fit said cylindrical surfaces of said punch and die implements for locating said implements with the punch and die thereof in correct axial alignment.

22. A die set for use in a press and including a punch holder shoe and a die shoe on which a punch implement and a die implement respectively may be mounted, and which are arranged one above the other, means for gaging said shoes for accurate movement toward and from each other,

supporting rails on the upper of said shoes for temporarily and adjustably supporting one of said implements thereon while correctly positioning the same on said upper shoe, and means for rigidly securing said first mentioned implement to said upper shoe for supporting the same independently of said supporting rails.

23. A die set for use in a press and including a punch holder shoe and a die shoe on which a punch implement and a die implement respectively may be mounted, and which are arranged one above the other, means for gaging said shoes for accurate movement toward and from each other, supporting rails on the upper of said shoes for temporarily and adjustably supporting one of said implements thereon while correctly positioning the same on said upper shoe, means for rigidly securing said first mentioned implement to said upper shoe for supporting the same independently of said supporting rails, and adjusting means on the lower shoe for engaging an implement placed thereon to move the same horizontally on the lower shoe into correct operative relation to the implement on the upper shoe.

24. A die set for use in a press and including a punch holder shoe and a die shoe on which a punch implement and a die implement respectively may be mounted, means for guiding said shoes for accurate movement toward and from each other,- one of said shoes having T slots formed therein adjacent to edges thereof, gages for positioning the work with reference to said die set, and clamping means cooperating with said T slots and said gages for adjustably positioning said gages on said die set.

GEORGE E. WALES.