US2169614A - Press - Google Patents

Description

L. E. PECK PRESS Filed Oct. 21, 1937 2 Sheets-Sheet 1 INVENTOR. 06w (2. ad

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WITNESSES Patented Aug. 15, 1939 PATENT. OFFICE w ranss LouisE. Peck, Pittsburgh. Pa... assig'nor to Thomas Machine Manufacturing Company, Pittsburgh, Pa.. a corporation of Pennsylvania .Applicatifll mm- :1, 1931, Serial No. 171,223

3 Claims.- (01. 164-23) This invention relates to power presses for operating punches, dies and other tools and more particularly is concerned with improved means for supporting reciprocating' parta'such as the 5 tool slide of a power press.

Heretofore, it has been the standard practice in the construction of a power press of the character indicated to support the slide or tool holder of the press slidably. in the gibs carried in the frame. The gibs are ordinarily in two pairs positioned on opposite or opposed sides of the slide and are usually made adjustable to compensate for wear. Because the means for reciprocating the slide, such as an eccentric and strap rod, are positioned immediately above. the slide, the height of the gibs 'is limited so that in 'the continuous use of known presses it is necessary to continuously adjust the gibs for wear in' order to preserve accurate tool movement. It has been proposed to position the gibs off-center respect to. the line of movement of the tool .the thrust of the eccentric so that the length height of the gibs can be, increased. This is said toreduce the wear between the gibs and the slide and the number of. timesthat the gibs must be adjusted in service. However, it? gives rise to the obiectionthat the thrust of the eccentric is off-center with respect to the support of the slide by the gibs so that accurate tool alignment is so diflic'ult to maintain and wear and even chattering are likely to occur. In addition to the foreging, lubricationof the wearing parts supportingthe slide has presented difliculty inasmuch as the clearance between the crank shaft. eccentric, 5 slide and other parts of the usual press does not permit the use of oil cups, and flexible tubing or other methods of lubrication provide a constant source of wear and breakdown and further add to the cost of the press. 1

It is the general object of my invention to avoid and overcome the foregoing and other difliculties and disadvantages of power presses and particularlythe .supports for the slides thereof by the provision ofan improved three-point support for 45 the slide du'ring its reciprocating movement, which supportinsures accurate tool alignment and reduceawear,v maintenance and repair.

'I'heforegoing and other objects of my invention are achieved by the provision of a power 0 press including in combination, a frame having back, which key extends parallel with the ribs and is received in a keyway in the frame to thereby provide a three-point support for theslide. I preferably lubricate the bearing parts by providing reservoirs inthe ribs of the slide which 5 are connected to the bearing faces of the ribs by a, plurality of passages and I lubricate the key and keyway by the provision of an oil channel in associationtherewith which is connected to an oil cup or reservoir. v v 10 For a better understanding of my invention reference should be had '.to the accompanying drawings wherein Fig. l is a side elevation ofa powerpress incorporating the principles'of my invention; Fig. 2 is a' sectional view taken on line 15 11-11 of, Fig. 1v but shown in perspective and on a larger scale to better illustrate .my improved manner of' mounting the slide or tool holder; Fig. 3 is a vertical cross-sectional view taken on line IIIIII of Fig. 2 and showing the detailsof 2o oiling the key and keyway support for'the slide; and Fig. 4 is a vertical cross-sectional view taken on line IV'IV of Fig. 2 and illustrating the manner of lubricating the gibbed support for the slide. 26

It will be understood that the principles f my invention can be employed in conjunction with reciprocating members of various kinds and as particularly employed in. power presses. However, in accordance with the patent statutes 1 30' l0 to'best receive and discharge the work is controlledby any suitable means, as forexainple, 40

the provision of an arcuate slot IS in the base mwmcn slidably receives a cap screw it carrled by the frame l4 so that after adjusting the angle of the frame as desiredthe cap screw can be tightened to secure the frame rigidly to the base. r

. The frame l4 includes a standardwork-receiv ing platform or bolster plate 20 to and from which a slide or tool holderv 22 is reciprocated by well known crank or eccentric mechanism 24 which will not be described in detail. The slide 22 is mounted for straight line motion to and from the platform 20 in spaced flanges or tip-- rights 26 which are usually formed integral with the frame and which terminate vertically below tically above the platform- 2|. The flanges I. are formed with opposed inwardly directed shouldera II which receive vertically extending hard- .enedmetalsibsllwhicharesecuredinplaceby suitable means. such as cap screws, not shown. Cooperatingwith eachgibflisanotherhardened metal gib I! which is adiustablymounted for movement-to and from its associated gib I. as by the provision of cap screws 34, and which likewisecanbcmovedinadirectionparalleltothe nearutfaocofeachofthelibsifite toward andfrom each other, by cap screws 86 carried in theflanges 2|.

The slide 22 is formed with ribs ll which 61- sngageinbearing relation with the outer fans oftheribsll. Aline drawnbetweenthecenters oftheribsllispreferablyparalleltothecrank shaftofthepressandisinalignmentwiththe doweledorscrewedtothebackoftheslideand extendingthefulllengthoftheslideinparallel relationtothe ribs. Thekeyl|isreceivedin thekeyliandkeywayi! areofthesamelength asthegibsll-llandtheribsllbutlparticuthe plate llandwhich is connected near the.

upperendoftheplatewithanoilcupllbyway ofapassage. Thekeyllisformedwithaplurality of transverse slots 02 which insure the flow oilto all surfaces engaging between the key and its supporting keyway.

With respect to the lubrication of the tribe ll andflandtheribslllformlongitudinalor verticalrecessesorboresflintheribsllwhicha asshowninl'ig.4,areclosedattheirbottomsby plugs it but are connected to the bearing faces of the ribs by a plurality of substantially horilontal ducts; The upper ends of the bores 04 cannot carryoil cups as these would strike the slide reciprocating mechanism 24, but instead spring caps ll are utilised to close the bores and theoilisstoredintheboresandworksoutas 18,100,014 the crankandeccentricll andverneededtothefacesoftheribsbywayofductsfl as will be understood;

It is believed that the operation of my improved mounting and the lubrication of the bearing parts will be evident fromlthe foregoing descriptitm. The slide is provided with sliding support at three different points or. areas which effect very accurate tool alignment and noticeably reduos wear. All bearing parts are particularly well lubricated and presses constructed as herein disclosed require materially less maintenance attention and attendant costs than do those having known types of slide support.

While I haveparticularly illustrated and described one embodiment of my invention, it should be understood that my invention is not limited thereto or thereby but is defined in the appended claims.

I claim 1. A power press including a box-shaped frame, a slide received in the box-shaped frame and including a tool car y ng portion, means mounted at the upper end of the box-shaped frame for reciprocating the slide, vertically extending; triangularly shaped ribs on the opposite sides of the slide and extending in opposite directions adiacent the sides of the box-shaped frame, fixed gibs on the frame engaging with the back sides of the ribs, adJustable gibs carried on the frame and engaging with the front sides of the ribs, a key of rectangular cm section secured centrally to the back of the slide and in parallel relation with the ribs, the frame adjacent the key having a keyway formed therein and slidably receiving the key, said key and keyway having three large flat bearing surfaces and interengaging to hold the slide against lateral or backward displacement, said"sllde reciprocating means and the tool carrying portion of the slide lying substantially in a common plane.

2. A power press including a frame, a slide received in the frame, means for reciprocating the slide, vertically extending ribs on opposite sides of the slide, gibs on the frame engaging with the fill, means for adjusting the gibs toward and from each other a key secured centrally to the back of the slide and in parallel relation with the ribs, the frame adjacent the key having a keyway associated therewith and slidably receiving the key. said slide ribs and said slide reciprocating means lying substantially in a common plane.

8. A power press including a box-shaped frame, a slide received in the box-shaped frame and including a tool carrying portion, means mounted at the upper end of the box-shaped frame for reciprocating the slide, vertically extending ribs 0n the opposite sides of the slide adjacent the sides of the box-shaped frame, gibson the frame slidably engaging with the ribs, means for adjusting the gibs toward and from each other and a key of relatively large rectangular cross section secured centrally to the back of the slide and in parallel relation with the ribs, the frame adiacent the .key having a relatively large keyway associated therewithand slidably receiving the key.

LOUIS E. PECK.

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