US2034316A - Stock bending and shaping device - Google Patents

Description

March 17, 1936. F. SUH] 2,034,316

STOCK BENDING AND SHAPING DEVICE Filed June 4, 1935 2 Sheets-Sheet 1 I "rwentor March 17, 1936. F. SUHI 2,034,316

STOCK BENDING AND SHAPING DEVICE Filed June 4, 1935 2 Sheets-Sheet 2 I nuentm Patented Mar. 17, 1936 UNITED STATES PATEL 541T 7 Claims.

This invention relates to an especially designed and constructed device for bending and shaping metal stocks, and has reference in particular to a distinctively constructed means for converting rectilinear rods and cylindrical tubes into curvilinear formation for diversified usage.

Inkeeping with an urgent desire to provide a simple and economical structure for accomplishing the requisite results with expediency and efficiency I have found it practicable to adopt a duplex unit assembly or structure wherein the units are disposed in superposed converse relationship and provided with properly arranged and coinciding bending and shaping elements whose collective force, when brought together,

is reliable in forming compound curves of uniform and corresponding proportions to an extent not heretofore obtained by relatively complicated machinery now available.

I have discovered by providing this doubleacting assemblage and constructing the units of substantially identical companion parts it is possible to not only satisfactorily form the desired compound bends, but to regulate the shaping thereof to insure the formation of predetermined uniform undulations.

Aptly fitted for the purposes intended, I have devised a systematic coordination of parts wherein each unit embodies a spring returned adjustably mounted tiltable adapter block for stock holding'purposes, together with a shaping mandrel' or die, the blocks being disposed at the outer ends of the respective units and the mandrels at the inner ends so that they come together in proper matching relationship to simultaneously coact in satisfactorily keeping the tube in place while bending or shaping it around the forming mandrels.

The preferred embodiment of the invention is illustrated in the accompanying pictorial drawings in which:

Figure 1 is what may be designated as a side elevational view of the double unit assembly with the units occupying their relative operative positions before the bending operation is started.

Figure 2 is a view like Figure 1 showing how the units come together and form the bends or undulations between the parts forcibly pressed or clamped thereagainst. 5 Figure 3 is a longitudinal sectional View of the lower or relatively stationary unit, taken on line 3--3 of Figure 4.

Figure 4 is a top plan View thereof.

Figure 5 is a vertical or transverse section on the line 55 of Figure 4. v

By way of introduction to the detailed description, it is to be pointed out that the two complemental units denoted by the numerals 6 and 1 are virtually duplicate in construction and While the same numerals might well be employed to designate the corresponding or identical parts it is believed desirable to represent them by distinguishing reference characters. It follows, therefore, that the relatively fixed unit 6.00mprises a base plate 8 attachable to an appropriate collateral foundation (not shown). Rising from one end of the base plate are flanges 9 disposed in spaced parallel order and of appropriate height. These are provided with selectively usable bearing holes it to accommodate the pivot pin H for the tiltable anvil or block l2 disposed between said flanges. This block is of general rectangular form having the inner end thereof cut oif obliquely as at 3 to permit it to swing down toward the plate 8 as illustrated in Figure 2. The upper edge is formed with a groove Id of appropriate depth to accommodate the rectilinear pipe, tube, rod or the like indicated at Hi. This block is adjustably mounted between the flanges through the instrumentality of the pivot pin l l and the bearing holes It] as is evident. At the opposite end of the plate are similar upstanding flanges it of appropriate shape between which is mounted a non-turnable roller IT. This is the die or mandrel for bending the pipe. It is provided with a peripheral groove it! which corresponds to the groove l 4. The mandrel is fastened between the flanges by way of an attaching pin l9 secured to said flanges/That part of the roller which contacts the base. plate 8 is flattened to retain the roller against rotation.

Referring now to the upper relatively movable unit I it will be observed that this comprises a flat plate l9-a of proportions more or less equal to the plate 8, it being disposed in parallelism to said plate 8 and movable toward and from the plate in a direction at right angles. This plate l9a carries an attaching stub shaft 20 which is connectible with the source of power such as the press or punch machine (not shown). Depending from the right hand end of the plate are spaced parallel flanges 2! having selectively usable bearing openings or apertures 22 to accommodate the pivot and attaching pin'23 of the tiltable clamping block 24. This block corresponds in proportion and shape to the first named block l2, having the same features l3 and I4. Both of these blocks are provided with headed pins 25 at the outer end and a coil spring 26 is attached to this pin and to a similar headed pin 21 on the base plate. This is a simple spring return means for normally maintaining the block in a plane parallel to the plates and at the same time allowing it .to tilt to the requisite angle as shown in Figure 2. The flanges 28 on the inner end of the plate l9a are like the flanges l6 and constructed to accommodate the mandrel .or roller 29. This is fastened in place by the same sort of a pin [9 and provided with a marginal or peripheral groove l8 to accommodate the pipe. Thus, it will be seen, that the two units 6, and l are approximately duplicatein construction and are disposed in superposed parallelism, the unit I being ofiset with respect to the unit 8 so that the parts come together in requisite interfitting relationship as depicted in Figure 2. Or stated otherwise as the unit 1 is forced down under proper force and pressure the two blocks I 2 and 24 automatically swing 'to tilted parallelism, while the two mandrels I1 and 2.9 move into close coacting proximity in "such away that the pipe l clamped between :the 'mandrels and blocks is formed into a compound or reverse bent curve. The coacting of :therforce of pressure on the pipe is such that the bends are substantially uniform in shape .and proportion. When the unit 1 is elevated -the3blocks I2 and 24 resume their normal horirzontal position.

it is believed :that a device of this type is :"characterized by appropriate cooperating im- .provements iso matched and inter-related as to permitithe results obtained thereby to tran- 'rscend in accuracy and. dependability though accomplished by far more complicated and expensive machines. It is believed .therefore, that :the invention *fulfills the requirements of a simplified structure of the type claimed and f is "something which may itraderas an improvement.

:It zis thought that persons skilled in the art Ito which the invention relates will be able to :obtain a clear understanding of the invention be endorsed by the after considering the description in connection swithith'e drawings. Therefore, a more lengthy -description is regarded as unnecessary.

Minor changes in shape, size and rearrange- .men't-"o'f details coming within the field of invention claimed may be resorted 'to in actual practice, if desired.

Having thus described the invention, what is claimed as new is: r

1. Ina structural assemblage of the class described, in combination, a relatively fixed support, a circular mandrel mounted thereon and provided with a peripheral stock receiving and retention "groove, an adjustably and tiltably fmountedholdingmember on said support prope'rly coordinated in relation to said mandrel, :a "relatively movable unit independent of said "first named unit and having a corresponding mandrel movable in a line at right angles to said support to allow it to position itself between the first named mandrel and tiltable -memb'er, said relatively movable unit being also "provided with a tiltable stock holding member bo'dily movable to a position outwardly of and in close proximity to said first named mandrel.

2. In a structure of the class described, a support provided at one end with upstanding spaced paralle'l apertured flanges, a substantially rec- :tangular' horizontally disposed block adjustably pivotally mounted between said flanges,

spring mean attached to the swingable end or the block and adjacent end of the plate for normally maintaining the block in a position parallel above the plate, the inner end of the block being beveled, and means at the opposite end of the plate for shaping and bending a pipe, tube or the like.

3. As a component part of a structural assemblage of the class described, a base plate provided at one end with upstanding spaced parallel apertured flanges, ,a spring returned rectangular block adjustably and pivotally mounted between said flanges'and having its inner end beveled to approach the plate when tilted, and having its upper edge formed with a pipe reception and retention groove, said plate being provided-at its opposite end with a non-rotatable peripherally grooved roller.

4. In a stock bending and shaping structure of the class described, a support provided at one end with a pair of upstanding spaced parallel flanges, said .flanges being :provided with Jon- .gitudinally spaced bearing Iholes, 'a horizontally disposed block mounted between "SflidififlhEGS, said block being :provided with a hinge fiplntle selectively disposable 'in'said 'bearingrholesgspring return means connected with the support and block, and normally maintaining the Eblock :in a position parallel tothe.support,-1the inner end of 'saidiblock being bevelled-to permit it to :swing toward and from the sup-port, amaddltionalpair of flanges on the support adjacent the opposite ends and spaced longitudinally from the Jflrst named flanges, and "a shaping mandrel mounted transversely on the support between saidlsecond named flanges and spaced longitudinally :from and disposed in a plane with'said block;

"5. In a device of the-class described, :a base provided at one end with a-tiltablespringreturned horizontally disposed longitudinally -elongatedblock formed. in its upper edge portion witha pipe reception and retention groove, one end portion'of 'sald blockbeing'transversely "cuton an oblique line to :p'rovide a bevelled surface swingable into close proximity to \thebase when the body portion is tilted in :-a direction away from the base, and amelativelwfixedshaping mandrel on said base space-d rlongitudinally from and disposed inaplanewith :said block.

6. In {a stock bending andfshaping structure of -the class described, in combination, a-:relati-vel-y fixed support, a shaping rmandrel mountedrigidon 'said support, an adjustably and tiltably "mounted stock holding member on the support spaced longitudinally from said'mandrel; excomp'lemental relatively movable unit 'disposedina "plane above said support and movable in a per- "pendicular line toward and .from the support, said unit being provided With a fixed shaping "mandrel located in a position to move'down between said first named mandrel and stock holding member, and an additional stock holding member carried by said unit and constructed and arranged to :move downwardly to -a position spaced outwardly of said first :named mandrel.

7. A stock bendingand shaping apparatus of the class described comprising a relatively fixed unit having self adapting stock holding -mean-s and a shaping mandrel, 'sald mandrel :being spaced longitudinally from said stock holding means, and a relatively movable -um't :independent of the first named 'unit adapted-for cooperation with operating "means and disposed in spaced parallelism above saidfirstnamed unit and movable at 'right' angles-toward and from said first named unit .inia substantially perpendicular line, said movable unit comprising a support provided on its under side at one end with a spring returned tiltably mounted stock engaging a holding block, said block being positioned in a direction outwardlyof and beyond said mandrel, and a second mandrel corresponding in construction to the first named.

mandrel and spaced longitudinally from and in a plane with said block and adapted to move, when in stock bending position, to a point between the first named mandrel and stock holding means.

FRANK SUHI.

Images