US1872115A

US1872115A - byerlein

Info

Publication number: US1872115A
Authority: US
Publication date: 1932-08-16
Anticipated expiration: 1949-08-16

Description

Aug. 16, 193-2. A. A. BYERLEIN 1,872,115

PRESS Filed Nov. 5, 1931 E: stress in the assembly rods.

1 Patented Au 16, 1932 Ii UNITED STATES PATENT ion-Flea ARTHUR A. BYERIQEIN, or DETROIT, MICHIGAN, AssIoNOIt ooENERAI. mommy CORPORATION, OF HAMILTON, 01110, A CORPORATION or DELAWARE I rBEss Application med November 5, 1931. Serial NO; 573,125.

to assembly rods, and then filling the space 'between the separated sections so as to main: tain a desired elongation of the assembly rods. x Other Objects and advantages of the invention will be apparent from the following description, the appended claims, andthe accompanying drawing, in whichi 1 Fig. 1 is a front elevation of a press show-' ing how the assembly rods are" properly so stressed orelongated, in'accordance with the present invention; a Fig. 2 is a section taken horizontally on the line 2-2 of Eig. 1;

Fig. 3 shows detail views of the spacers, and

Fig. 4 is a detail sectional view of the raising jack. 1

Referring more particularly to the drawing by reference numerals, 10 designates generally a drawing or stamping press adapted for working sheet metal or the like.

shown, this press comprises superposed sections, namely, the arch 11, the

Opposite uprights

12 and 13 andthe bed 14, each of which may be integrally castor formed, these several sections being held rigidly together by means of four vertical assembly rods, designated 16, 17, 18 and 19. These assembly rods extend through vertical holesprovided in the several sections, and theupper and lower ends threaded engagement withthe rod ends.

The nuts 20 may be tightened by means of wrenches or similar tools, but such tools are not suited to produce a desired tension or ltn accordance with prior practice. it has been the custom to stress or lengthenthe assembly rods by heating'theni with a torch sons to cause their elongation, after which the nuts are tightened L on up and the rods permitted to cool. However,

of the rods are provided .with nuts 20 in the rods takes placewhere'they have been heated, and it has been found impossible to stretch the several rods uniformlythroughout theirlength forthis reason. There is a greater reduction in sectional area of the rods at when this is done,.most of the elongation of the heated portions, and when the assembly is completed, there is no way of knowing if the tension on the rods equals the safe working capacity'of the press. If the tension on the rods does not equal the safe working capacity of the press the rods will be stretched somewhat the first time the press is subjected to its full load, causing the'frame to open at its joints and causing frame sway wlth resultant misalignment of the dies and shaft bearings.

In accordance with the present invention A I the assembly rodsare' uniformly and simultaneouslystressed ,to the desired degree, when the rods are cold, and no unusual reduction in sectional area takes'place at any one point along the len hs of the rods. This stressing or elongatlon of the rods is accomplished by applying a known force so as to-separate "adjacent sections Of-the press after the nuts 20 have been tightened with a bar or spanner wrench. As a suitable means for. creating this separating forc a jack 21 is placed on the bolster plate 22, and.

a suitable filler block 23 is applied between the top of the jack and the lower side Of the slide 24, with the slide arranged in an end or deadcenter position. This jack, as shown in Fig. 4, may comprise a" base section 26 and a movable top member '27 fitting therein and adapted to be raised by turning in thebolts 28 sothat ends of the latter extend into the chamber 29 provided between the base 26 and top 27. Chamber 29 is filled with'oil or other suitable liquid, and as the screws 28 are moved axially into the chamber, sufiicient displacement'of the liquid filling means of the. jack takes place to create a desired upward pressure on the slide 24 of the press,

and, of course, a downward pressure on the press bed.' The result is that the arch 11 and the

side frames

12 and 13, which are secured to the archby means of boltconnections 30, are forced upwardlyend separated o signature.

from the bed 14, the assembly rods being simultaneously and uniformly stretched to a' desired degree sufiicient to produce a determined stress or elongation. The spaces between the

frame sections

12 and 13 and the bed 141are-then filled by applying

spacers

32 and 33 at each assembly rod, location as shown in Fig.2, these spacers being sllpped into place by moving them transversely with respect to the axis of the assembly rods.

When the several spacers, which are preferably plates of steel or the like, are in place, the force created by the hydraulic jack is relieved and the jack is removed, leaving the assembly rods stretched a predetermined amount and tensioned in accordance with the requirementsof the safe working capacity of the press. The several assembly rods .are stretched uniformly throughout their length and there is no irregularity in reduction of cross-sectional area.

While the method herein described, and

the form of apparatus produced thereby constitute preferred embodiments ofthe inven-' tion, it is to be understood that the invention is not limited to this precise method and formof apparatus, and that changes may be made in either without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. The method of stressing the assembly rods of a sectional press comprising forcing adjacent sections apart with a force sufficient to cause the desired elongation. of the rods,

and filling the space thus obtained between the adjacent sections.

2. The method of stressing the assembly rods ofa sectioned'pr'ess comprising forcing ad acent sectlons apart. so as to simultaneously and similarly elongate all of the as 'semblyrods, and applying spacers between the separated sections so as to permanently maintain a desired elongation ofthe rods.

J 3. The methodof stressing the assembly rods of a sectioned press comprising jacking the upper portion of the press away from the lower portion thereof so as to simultane- 56 ouslya-nd similarly elongate all of the assembly rods to the desired degree, and filling the spaces between the separated parts of 4. The method ing a predetermined'force between the press bed and the crank shaft so'as to separate adjacent sections ofthe press, and applying spacers between the separated sections.

In testimony ARTHUR A. BYERLEIN;

of stressing the assembly r rods .of a sectioned press comprising exert-- whereof I hereto affix my