US1716414A

US1716414A - Power punching press

Info

Publication number: US1716414A
Application number: US161617A
Authority: US
Inventors: Otto S Beyer
Original assignee: EW Bliss Co Inc
Current assignee: EW Bliss Co Inc
Priority date: 1927-01-17
Filing date: 1927-01-17
Publication date: 1929-06-11
Anticipated expiration: 1946-06-11

Description

Je 11,1929. o. s. BEYER 1,716,414

' POWER PUNCHING PRESS- Filed Jan- 17 1927 5 Sheets-Sheet l INVENTOR a v By Attorneys,

June 11, 1929. o. s. BEYER 316,414

POWER PUNCHING PRESS Filed Jan. 17, 1927 s Sheets-Sheet 3 w w W m2 F w... MM 1 f v y 472* a B (\A @ik @Z Patented June 11, 1929.

, UNITED STATE! OFFICE.

OTTO S. BEYER, OF BROOKLYN, NEW YORK, ASSIGNOR T E. W. BLISS COMPANY, OF

NEW YORK, N. Y., A CORPORATION OF DELAWARE. L

POWER PUNOHING IPRE SS.

Application filed January 17, 1921. ei'ial No. 161,617.

This invention relates to presses for punching, embossing, or other work on metal or other material, and is designed to provide a press capable of operating at high speed 5 and doing heavy work. i

The invention is embodied in a press hav ing a relatively short stroke and capable (with a suitable automatic feeding mecha the line '11 in Figs. 2 and 4, and the portion below that line being in the plane of the line 1*1 in those figures. i

Fig. 2 is a side elevation of the'lower part of the press, the upper part being a vertical transverse mid-section in the plane lines 2-2 in Figs. 1,3 and 4.

Fig. 3 is a horizontal section, partly in plan, the sectional portionbeing in the planes of the lines 3-3 in Figs. 1 and 2.

Fig. 4 is a horizontal section taken mainly in the plane of the line 4-4 in Fig. 2, but the plunger being in the plane of the line 44: in Fig.5.

Figs. 5 and 6 are side and front elevations of the plunger. V

Figs. 7 and 8 are a side elevation'and plan of the saddle.

Figs. 9 and 10 are a plan and side elevation of the saddlerest or pad.

The specific machine shown in the drawings has a main frame comprising a base A supported uponv a sub-base or pedestal B, and supporting a bed C, an open uprlght frame D, and a press head E.- The parts A, D, E are tied together by four tie rods F which pass through them and .have nuts on their ends. This construction of frame is convenient, butnot essential. v

The presshead E supportsa power shaft G, the middle portionof which is reduced, as shown in Fig. 1, to form an eccentric g. Thev shaft turns in bearing sleeves H H which are housed in a transverse bore in the press head E; The shaft is driven in any suitablemanner', preferably throughfa clutch of the well-knowntype, from a; flywheel I which is clutched to the shaft under of the control of a clutch-operating arm 21 operated by a treadle j in the usual and well-understood manner. The fly-wheel I may be driven in any suitable manner, being shown as formed as a gear meshing with a pinion I: on theshaft of an electric motor J.

Mot1on is communicated from the eccentr1c g to a punch head K to reciprocate the latter rapidly in vertical direction, so that a punch we carried by this head and coactmg with a die n supported on the bed C may punch or otherwise act upon astrip or other sheet of metal or other, material which 1s fed between the punch and die in usual manner. At n is shown the usual stripping plate.

The,means for communicating motion from the eccentric gto the punch head K will now be described. Just over the head K is a plunger L, shown separately in Figs. 5 and 6. This plunger has a widely extended foot or base flange is which is bolted to the head K by screws 6 b (Fig. 4) and it has a tubular sliding portion Z which slides. within a vertlcal bore 30 in the press head E. It is preferable to make the sliding portion Z and the bore p cylindrical. The sliding portion Z is cut through at g to form opposite openings which afford a clear space for the passage of the shaft G, and also preferably permit partial entry of its bearing bushings H. These bushings are utilized to guide the slide Z and prevent its executing any rotary movement on 1ts vertical axis; and for this purpose the ends of these bushings are made square, so that they terminate in parallel vertical planes where they abut against the surface portlons r forming the margins of the openings g, this abutment being clearly shown in .Fig. 3, and thereby a vertical slideway or guide is formed which restrains the plunger to an upright sliding movement without possibility of turning. Engaging the underside rately in Figs. and 8. This saddle rests upon asupport or pad P shown separately in Figs. 9-a nd v10, and which constitutes essenof the eccentric is a saddle M, shown sepatially a part of the plunger L, butis fonconvenience made separate therefrom. Between I specttothe plunger; this adjustment is best "afforded: by: meansof. a wedge s introduced j between the pad and plunger, as 1 shown in through an'opening u in the lower partof the plunger, best shown in Fig. 6.

The upstroke of the punch head is effected by retracting springs Q Q which may be arranged in any convenient manner. Preferably they are mounted on the press head E, and for compactness are dropped into recesses in that head, as shown in Figs. 2' and 3. Each of the springs Q is shown as comrisin two com ression s rin s of e ual' stress, one nested within the other according to a well-known construction, and exerting an upward stress on rods R R which oxtend down through the springs and through openings in the head, and are fastened at their .lower ends to the base flange 7c of the plunger L, as shown in Fig. 2. The springs are preferably enclosed in tubular casings v.

The punch head K requires to be accurately guided in its vertical movement, and this in the construction illustrated is accomplished by giving it a sliding engagement with four fixed studs T T fastened in the bed C and projecting upwardly therefrom, as shown in Fig. 2, and having sliding engagement with bushings w fixed in the headK, as shown in Fig. 1. The studs T T are spaced widely apart so as to be nearly aligned with the posts D D and rods F F, whereby to leave. a wide space between them for giving access to the punch and die. In operation the rotation of the eccentric imparts an oscillating motion to the saddle M,-which is free to slideon the pad P. As the eccentric center descends, the downward movement is transmitted through the saddle and pad to the plun er and punch head. The lateral movement o the eccentric is imparted to the saddle, which slides laterally on to of the pad P. The return orupstroke is e feeted y' the stress of the spring Q Q. The construction is such that 'WIth a short stroke an extremely rapid reciprocationma be im.- parted to the-punch head, 'so that .t e press may be driven at high speed. The machine is very compact and amply strong forhea work. The punch head affords a dire application 0 .the working pressure- The, capacity for high speed is due to the minimiziing of size and weight of the reciprocating parts. This reduces the mass of the" parts to be driven through the clutch, and relieves the clutch of thesevere shock ofstarting 'a heavy press, which-of itself enables a higherstarting speed to be-iniparted. Thel'punch head isadeq'uat'ely guided by the fixed studs",

T, which give accurate .ali' ment, and avpid the weight of the long sli ing head, moving in prolonged vertical slidew' ays, heretoforecommonly u ed The invention may be modified in its-mechanical details, its construction being v'ariable in accordance with the work to be performed, and within the scope of the appended claims.

What I claim is:

1. 'A power pressof the described type comprising a frame, an upright cylindrical tubular slide having bearings in said frame above and below the driving shaft, the driving shaft intersecting said slide having bearings in the frame on opposite sides of the slide, and having an eccentric within the slide, a punchhead carried by the slide, means within the slide for communicating motion from said eccentric to the punch-head, and yielding means for drawing the punch-head upwardly.

2. A power press according to claim 1, the

punch-head located beneath the slide and proing portions of the punch-head.

3'. A power press comprising a fixed frame having an upright cylindrical slideway, an upright tubular slide movablev in said slideway, a transverse shaft intersecting said slide, having bearings in said frame, the slide having bearings above and below the shaft, :1 punch-head. attached beneath said slide, up-

right guiding means for preventing rotative displacement of said slide, and means Wlthlllthe slide for communicating motion from said shaft to the punchhead.

4. A power press comprising-a fixed frame having a vertical cylindrical slideway, a plunger having a cylindrical portion working in said slideway, and having guiding faces in vertical planes intersecting its cylindrical portion, a transverse shaft, and bearing bushings for ,said shaft within said fixed frame, the ends of said bushings engaging said guiding faces to prevent rotary dis a said plun er, and a punch-hea carried beneath sai plunger.

5. A press of the described type comprising a shaft having an eccentric, a vertically shaft intersecting the plunger with its eccen- "tric within the plunger, a saddle engagilig the under side of the eccentric, and a within the plunger supporting said sa dle and communicating the downward working cement of moving hollow plunger and punch-head, the

thrust therefrom to the plunger and punchhead, with means between the pad and punch-.

head for adjusting the relation of the pad and punch-head whereby to set the latter up or down.

. 6. A press according to claim 5, with a wedge between-said pad and punch-head, and means for adj usting such wedge whereby to vary tlre relation between the pad-and punch.- head to set the latter up or down.

7. A press comprising an upright lunger provided with a tubular slide movab e on its vertical axis, anupright frame symmetricalinane I I i 0 I I I i with said axls, comprlsing a bed, four uprights thereon, and a head above said uprights, said head having an upright slideway for said slide, and havingtransverse hearings on opposite sides of the slide, a'horizontal shaft in said bearings having an eccentric within the slide, a punch-head carried by the plunger below the head, and means within the tubular slide for communicating motion from the eccentric to the-slide.

8. A press comprising an uprighttubular slide movable on its vertical axis, an upright frame symmetrical with said axis, having an upright slideway for said slide, and having transversebearings on opposite sides of the slide, a horizontal shaft in said bearings having within the slide an eccentric wholly within the radius of the shaft so that the shaft may be removed endwise from its bearings, and means within the tubular slide for comnlounicating motion from the eccentric to the s ide.

9. A press according to claim 8, the frame having bushings seated within its head forming said bearings.

10. A press according to'olaim' 8, the means for communicating motion comprising a saddle engaging the lower half of the eccentric and movable within the hollow of the tubular slide, in horizontal direction relatively to the slide. w

11. A press according, to claim 7, the punch-headworking between two pairs "of said uprights.

12. A power press having a fixed vertical frame transversely bored for receiving shaft bushings in said transverse bore on opposite sides of said slide, a shaft passing through the slide, having hearings in said bushings, and having between said bushings an eccentric of smaller diameter than the shaft, the slide enclosing said eccentric, and means within the slide for. communicating motion from the eccentric to the slide, whereby the shaft is removable endwise through a bushing and the slide has guiding hearings on both sides of its connection with the eccentric. In witness whereof, I have hereunto signed OTTO s. BEYER.