US2242505A - Stamping machine - Google Patents

Description

May 20, 1941;

H. MQBQLs-rQN STAMPING MACHINE Filed July 26, 1940 2 Sheets-Sheet 1.

jag-z May 20, 1941. H. M. BOLSTON STAMPING MACHINE I Filed July 26, .1940 2 Sheets-Sheet 2 71/ aQW 7rd? Patented May 20, 1941 UNETED STATES PATENT OFFIQE 2,242,505 STAMPING monmn Harry M. Bolston, Revere, Mass. Application July 26, 1940, Serial No. 347,805

3 Claims.

This invention relates to improvements in a stamp-ing machine used in the stamping of stock from which shoe cutting dies are to be formed.

It is customary in prior practice to stamp certain identifying numbers and letters in the stock from which shoe cutting dies are formed, such a notation serving in certain cases to identify the maker of the die, the owner of the die, thestyle or type of the last for which the shoe parts are to be cut, and the size designation of the particular die. It will be understood that a large number of dies are required to'include all the various sizes of shoes which constitute a complete line, and it is necessary that the dies be clearly and accurately stamped so that mistakes Will not be made in cutting material with the die. In the prior practice the figures and letters have usually been stamped individually.

An object of my invention is to provide a stamping machine by which all of the identifying markings required on a particular piece of die stock will be made at one time in a clear and legible manner.

Specifically, it is an object of my invention to provide a movable head for a stamping machine having means to removably receive individual marking dies whereby the particular dies required may be readily set up and easily changed.

A further object of my invention resides in the provision of a rotatable head associated with the body of the die holder whereby the size marking or other identifying marking may be readily changed by rotating the head after each operation of the stamping machine which enables the marking of the die stock for a complete set of cutting dies without requiring any handling of the individual dies by the operator of the ma chine.

Further objects and advantages of my improvements will be more readily apparent from the following description of the preferred embodiment as disclosed in the attached drawings, in which:

Fig. 1 is a front elevation of chine;

2 is a side elevation thereof;

Fig. 3 is a plan view of the pivoted head of the stamping machine;

Fig. 4 is a. bottom View of the head member shown in Fig. 3;

Fig. 5 is a vertical section on the plane indicated 5-5 in Fig. 3 and showing in dotted lines the manner in which a die is inserted or removed .from the rotatable head;

the stamping ma- Fig. 6 is a vertical cross-section taken on the plane 6--6 in Fig. 5; and

Fig. 7 is a plan view of a portion of the die stock showing the manner of applying the marking thereto.

The stamping machine includes the usual bed plate In, vertical guide rods l2 and reciprocal head member l4. A base plate I6 is fixed to the bed by the bolts 58 and serves as a mounting for a removable template 23 having secured thereto an angle element 22 against which the die stock 24 is positioned, as shown in Fig. 2. The template 20 has a slot or groove 25 engaging an overhanging plate 28 which is fixed to the bed plate by the screws 30, and the template 20 has a groove 32 on the other side which is engaged by the clamping lever 34 held to the bed plate by the pivot screw 36. It will be understood that the die stock material 24 comes in various widths and the provision of the removable template 20 permits the setting up of the stamping machine to take care of any width of die stock without requiring careful adjustment by the operator so that the marking will be properly applied.

The head member l4 includes a pivot pin 33 constituting a mounting for a pivoted die holder 40 which is normally locked in operative position by the locking means 42 but may be swung out of position to permit the change of the marking dies. The die holder 40 has a slot 44 to receive the individual die members 46,- the upper ends 48 o-f'which are flush with the upper surface of the pivoted member 49 so that they will bear against the abutment plate 50 carried by the stamping head. The die members 45 have shoulders resting on a plate 52 fixed by screws 53 to the die holder 40 as shown in Figs. 4 and 6. A plate 54 is attached by screws 55 to the member 40 on the other side of the slot 44. The die members are squeezed together and tightly held in position by the follower block 56 fixed by the bolt 58 threaded into a locking clip 60.

A rotatable die carrier 82 is supported by the holder 40 through the pivot pin 64, to the upper end of which is fixed the knurled adjusting head 66 by the pin 68. An annular ring 10 is secured to the bottom of the head 62 by the screws 12 and serves to hold the marking dies 14 which are dropped in place as shown in Fig. 5'. The flange 16 serves to retain the dies 14 against upward displacement except when the head is rotated to bring the die beyond the edge 18 of the flange 16 to the marking position. In order to hold the rotatable head in position and to in-.

2 sure that the next die member is brought into correct position, I provide an arm 82 pivotally carried through pin 84 on the holder 40' and normally urged by the spring 86 to engage the arcuate notches 88 of the adjusting head 66 through the roller 90 carried at one end of the lever 82.

In Figs. 1 and 2, a plurality of dies 46 are shown assembled and ready to be used for marking, while the rotatable head member has dies 14 assembled therein to mark the size designation, the numeral I indicated at 80 being positioned in alignment with the dies 46. In operation, a template 20 is fixed in position in accordance with the particular die so that the operator merely places the die stock in position against the angle plate 22. Suitable marking die members are assembled in the die holder 40 as clearly shown in the drawings. The holder is locked in operative position and the stamping machine is ready for operation. As each piece of die stock is marked, the rotatable die carrier is turned to bring the next desired size marking into position. The operator may, therefore, complete the marking on the die stock for an entire set of cutting dies before he is required to change the individual dies in the holder and carrier.

I claim:

1. In a stamping machine rality of markings in the die stock for shoe cutting dies, die stock positioning means, a vertically reciprocable stamping head having an abutment plate, a die holder pivotally mounted on said stamping head to swing in a horizontal plane beneath said abutment plate, said holder having a slot to removably receive individual die members, means for locking a plurality of die members in said holder, a rotatable die carrier associated with said die holder, a plurality of die members arranged in a circular row and supported by said holder, means for rotating said carrier, means for releasably locking saidcarrier in position whereby a selected die is brought into marking position in alignment with the first mentioned dies, all of the dies in marking position being retained against upward displacement by the abut-' ment plate of the stamping head.

2. In a metal stamping machine, a vertically reciprocable stamping head having an abutment plate at the lower end thereof, a marking die for making a plusto'ck to be operated upon 7 neath said abutment holder pivotally mounted at one end on said stamping head and arranged to swing in a horizontal plane inwardly into operative position beplate or outwardly into inoperative position, said die holder having a slot adapted to removably receive a plurality of individual marking dies when swung to inoperative position, said die holder and said dies having cooperating shoulders to hold said marking dies in position with the upper ends of said marking dies in the same plane as the top surface of said die holder, all of said marking dies being adapted to 1 seat against said abutment plate when said die applied to the striking position and pressure is face of the marking dies by downward movement of the stamping head.

3. In a stamping machine for marking the die stock for shoe cutting dies, a vertically reciprocable stamping head having an abutment plate at the lower end thereof, a vertically disposed pivot pin fixed to said stamping head at one side thereof, a marking die holder pivotally supported at one end bysaidpivot pin and arranged to swing inwardly, in a horizontal plane into operative position beneath said abutment plate, said die holder having a slot to removably receive a plurality of individual marking die members which may be assembled from the upper side of said die holder when said die holder is swung outholder is in operative 1 wardly to inoperative position, means for retaining said marking die members in position with their upper ends in the same plane as the top surface of said die holder, said die holder having an extension at the end opposite to the pivotally supported end, a rotatable marking die carrier mounted in the extension of said die holder, said rotatable die carrier being adapted to removably receive a plurality of individual marking dies retained in position with their upper ends in the same plane as the upper ends of said first mentioned marking dies, said rotatable die carrier being adapted to move a selected marking die into position beneath said abutment plate into alignment with said first mentioned marking die 3 whereby when pressure is applied to the striking faces of said marking dies by an operative stroke of said stamping head all of the dies in striking position will seat against the common abutment plate.

HARRY M. BOLSTON.

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