US1655568A

US1655568A - Die cushion

Info

Publication number: US1655568A
Application number: US150747A
Authority: US
Inventors: Fredrich J Rode
Original assignee: Marquette Tool & Manufacturing Co
Current assignee: Marquette Tool & Manufacturing Co
Priority date: 1926-11-26
Filing date: 1926-11-26
Publication date: 1928-01-10
Anticipated expiration: 1945-01-10

Description

Jan, 10, 1928. I 1,655,568

- F. J. RODE I DIE CUSHION Filed Nov. 26. 1926 2 Sheets-Sheet 1 Jamie F. J. RO'DE DIE CUSHION Filed Nov. 26. 1925 2 Sheets-Sheet 2 Patented Jan. 10, 1928.

UNITED STATES I 1,655,568 PATENT OFFICE.

FRIEDRICH J. RODE, OF CHICAGO. ILLINOIS, ASSIGNOR '1O MARQUETTE 'IOOL & MFG. COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF' ILLINOIS.

' DIE CUSHION.

Application filed November 26, 1928. Serial No. 150,747.

Ihis invention relates in general to die cushions, particularly adapted though not necessarily limited in its use, with machines i for drawing sheet metal, but morev particularly the invention relates to the construction and means for mountin and guiding the pressure pad whereby t e costl accurate machining of the pads and press ed will be obviated and the old method of fastening and closely fitting the gibs and guides will be dispensed with, and at the same time the pad will be properly positioned and guided and will be prevented. from lateral and endwise movements.

Furthermore, with the present invention it is possible to mount and guide a pad of this character in an opening in the bed of a press which is considerably smaller than the opening in the press bedand at the same time maintain the ad in proper position.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this invention, and in which Figure 1 is a view partly in elevation and partly in vertical section of a portion of a sheet metal press having a ad constructed in accordance with the principles of this in-.

vention connected therewith.

Figure 2 is a horizontal sectional view taken on line 2-2, Figure 1.

Figure 3 is a detail vertical sectional vlew taken on line 33, Figure 1.

lgigure 4 is a side elevation of the pressure .pa

Referring more particularly to the drawings the numeral 10 designates generally a portion of a press having a bed plate 11 thereon, uprights 12, a reciprocating ram 13,

a die 14: carried by the ram, and a die 15 mounted upon the bed plate 11, all of which parts may be of the ordinary and well known construction. I

Disposed below the bed late 11 are cylinders 16, any number. of wiich may be provided and in each of which cylinders is ar-.

ranged a reciprocating piston (not shown);

The cylinders receive a supply of fluid th oug suitable pipe connections 17 to which of a length considerabl is connected a pipe 18 leading from any suitable source of fluid-supply.

Connected with each of the pistons is a piston rod 19 which extends above the cyliners and the cylmders are supported in any desired or suit-able manner such as by means of members 20 which in turn are held in pos1t1on by means of hangers 21 on which may be arranged fastening nuts 22. A pressure pad or plate 23 is provided and is supported by means of the plston rods 19 through the medium of suitable connections 24 between the piston rods and the pad.

This pad 23 moves within the opening of the press beneath the bed plate 11 and is provided so as to form extending bearing surfaces for the pad.

Secured to the bed of the press and adjacent each of the guideways27 is a guide 29 held in-position in any desired or suitable manner such as by means of screws or bolts 30. Secured also to the bed of the press and adjacent each of the ends of the pad 23 and located so as to enter the guideways 28, is a guide 31 secured in position in any suitable ganner, such as by means of screws or bolts All of the

guides

29 and 31 are preferably greater than the combined thickness of t e padand length of the dependin will be guided tli roughout its entire extent of movement.

The guides 29-31 may be of any desired,

thickness according to the depth of the guideways into which they are to project, and by providing the guides and guidewa s 29-27 on the sides of the pad lateral moveportions so that the pad vented, and at the-same time the pad wil be guided throughout its entire degree of movement.

This construction and method of mounting the pressure pad has been found very practical and inexpensiveto manufacture as it obviates the costly accurate machining of the pads and the press beds and alsodispenses with the old method of fastening and fitting guides or gibs into the bedsof presses so as to guide the pads. i

With the present invention very little accurate machining is necessary as the guides will hold the pad against shifting movement.

In installing a pad of this character it will be manifest that a pad 23 of a size considerably less than the size of the opening in which it is to operate may be employed as the pad will be held in position by means of the guides 29-31, and all that is necessary is to rovide guides of this character which will %e of a thickness or size to compensate the differences in sizes between the pad and the opening in which it operates.

Passing through the bed plate .11 are pins 33 which support a member 34 that co-operates with the die 14 for clamping the work 35 and for holding the work while it is being shaped over the die 15.

As the ram 14: descends the work holder or draw ring 34 will, through the medium of the pins 33, depress the pressure pad or plate 23 against t e pressure in the cylinders 16.

While the preferred form of the invention has been herein shown and described it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the sco e of the claims, without departing from t e spirit of this invention.

What is claimed as new is 2-- 1.v A sheet metal working press embodying a bed having an opening therein, a pressure pad movable in said opening, means for resisting the movement of the pad in one direction, said pad having guidewaysopening through the lateral faces thereof, and guides secured to the walls of said openin s and en'- tering the respective guideways and whereby the pad may be dropped into position within said opening to-be guided in its movement by the guides sup orted by the walls of said opening in the ed. I

2. A sheet metal working press embodying a bed having an opening therein, a substantially rectangular pressure ad movable in said opening, means for resisting the movement of the pad in one direction, there being guideways opening through the lateral faces of the pad,and guides secured to the walls of the said opening and entering the respective ideways and whereby the pad may be ropped into position within said opening to e guided in its movements b engagement of portions of its periphera edge engaging the guides on the walls of the said opening in the bed.

3. A sheet metal press embodying a bed having a substantially rectangular opening therein, a substantially rectangular pad loosely fitting and movable in said opening, and co-operating guides and guideways on each of the respective adjacent upright walls of the pad and said opening for holding said pad against lateral and endwise movements and whereby the pad may be dropped into position within said opening to be guided in its movement by the engagement of portions of its peripheral edge engaging the guides on the walls of said opening in the bed.

1. A sheet metal press embodying a bed having a substantially rectangular opening therein, a substantially rectangular pad loosely fitting and moving in said opening, the lateral faces of the pad havin extended upright portions arranged about t 1e periphery of said pad, upright open uideways in said portions, and extended gui es secured to the walls of said opening and entering the respective guideways for uiding said pad in its vertical movement and for maintaining the pad against lateral and endwise movements in said opening. I

5. A sheet metal press embodying a bed having a substantially rectangular openin therein, a substantially rectangular pad loosely fitting and moving in said opening, the lateral faces of the pad havin extended upright portions arranged about t e periphery of said pad, upright open guideways in sald portions, extended guides secured to the walls of said opening and entering the respective guideways for guiding said pad in its vertical movement and for maintaining the pad against lateral and endWise movement in said opening, and means for removably securing the guides in position.

6. A sheet metal press embodying a bed having a substantially rectangular opening therein, a substantially rectangular pad loosely fitting said opening, each of the upright faces of the pad being provided with one or more guideways opening through said faces, guides secured to the press adjacent the side faces of the pad and entering the respective adjacent ideways to prevent sidewise movement o f the pad, and guides secured to the press adjacent the end faces of the pad and entering the respective guideways in the lastsaid faces for facilitating the placing of the pad in the machine and the removal of the pad therefrom and for preventing endwise movement of the pad whereby accurate machining and fitting of the parts will be obviated.

In testimony whereof I have signed my name to this specification on this 10th day of November, A. D. 1926.

FREDRICH J. RODE.