US1440707A - Drop hammer - Google Patents

Description

H. TERHUNE.

A J an. 2, 1923.

DROP HAMMER.

FILED 00120, 1919.

MM I E. Zy5

Patented Jan. 2, i923.

sra'r HOVVABD TERHUNE, OF EAST CLEVELAND, OHIO,

ASSIGNOR 'IO THE KILBY MANU- FACTURINGCOMPANY, OF CLEVELAND, OHIO, A CORPORATION. OF OHIO.

DROP HAMMER.

Applicatin filed October 20, 1919.- Serial No. 331,889.

To aZZ whom it may concern:

Be it known that I, HOWARD'IERHUNE, a citizen of the United States, residing at East Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Drop Hammers,.of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to drop hammers and has for its object the provision of a new, improved, and simplified construction whereby the movable member of the hammer may be laterally adjusted relatively to the fixed member thereof and retained in adjusted position notwithstanding the excessive shocks and strains to which devices of this class are subject. My invention is independent of the particular nature or mode of operation of the hammer, and thus is equally applicable to steamhammers and to board hammers. Such devices when employed for the making of drop forgings are generally equipped with mating dies, one part of which is rigidly attached to the anvil or base of the hammer and the other part of which is attached to the movable head thereof. Owing to the method of attaching these die members to the respective parts of the hammer, which is generally ac complished by means of wedges'or keys, since only devices of such simplicity and strength are capable of withstanding the stresses to which such devices are subjected, and owing also to inaccuracies in fashioning the exterior portions of the dies themselves, it is frequently found that when the two die members are secured in placethey will fail of accurate registering with each other b T a. small amount, and in order to bring theiii into the correct relative relation it has long been the custom to shift the entire top structure of the machine relatively to the base or anvil. At the same time it is impossible to attach these parts rigidly to eachother 1 after the adjustment is complete, else the force of the recoil and the vibrations caused by the hammerblow would cause the. fracture of some of the parts. Accordingly the objects of the present invention are the pro vision of means of great simplicity and strength whereby the above described adjustment can be secured and whereby after adjustment the parts may have the necessary freedom of movement without impair:

mentof such adjustmei'it; and other objects andadvantages of the invention willbecome apparent as the description proceeds.

In the drawings accompanying and forming a part of this'application l. have illustrated one embodiment of my invention, al though it will be understood that these drawings are illustrative of only one of the many physical structures in which my in ventive idea may be utilized. In these draw ings F ig. l is a frontelevation of a portion of a drop hammer embodying my improvements, one side of the device being shown in section; F 2 represents a side elevation of the'partsishown in Fig. 1; and Fig. 3 is a horizontal sectional view taken upon the broken line 33 of Fig. 1.

Describing the parts byreference characters,.the base'or anvilof the hammer con sists of a massivev metal block 1 having at opposite sides the elevated portions 22 defining between them a channel 3 in which the anvil cap or Show is locked by means of the key 5 wedged "therein; This shoe is in turn provided withasuitablc groove 6 for the reception of the stationary die mem-. her (not shown). y v

Each of the portions 2-2 is formed with an upwardlyfacingnsupporting surface 8 in which is formed the transverse groove 9, whose inner end .0pens adjacent the shoe 4 and whose outer end opens. intothe pocket 10. Outside 'offthis pocket the base memher 'is formed with anabutment 11 which rises'above, the surface 8.

I Seated upon the portions 2-2 are the ups rights 12-12 awhose inner faces are pro-. vided with the parallel guideways l3-'-13 between whi'chis slidably mounted the ham mer 14., This hammer. is operated in any suitable manner, the means for accomplishing this not being-shown herein since my invention is independent thereof. Its lower face is shown as provided with a groove 15 for the reception of the movable member of the die (not illustrated). The'lower end ofeach upright is provided with a foot 16 having a surface complementary to and resting on the surface 8 and also having a tongue 17 fitting in the groove .9. The outer face of each uprightis provided at the point opposite to the abutment 11 with a thrust-surface 18, and theadjacent face of the abutment is'formed with a complen'ientary thrust-surface l9. Between the surfaces 18 and 19 I interpose a wedge member 20, preferably arranged in vertical POS1- tion and preferably'provided with. a vermaintaining; it in the proper position rela tively to the surfaces which it engages, preventing it from becoming canted and ensuring at all times a maximum of surface contact; this end being further insured, if desired, by forming the rearward side of the wedge and the surface 18 which it contacts with the cooperating tongue and groove The foot 16 is formed'with a notch 25 giving access to this wedge and affording room for the abutment 11, and the wedge is preferably provided at its upper end with projecting shoulder 26 to facilitate its loosening or adjusting by hammering if. and when required.

The uprights are secured to the base by suitable bolts 30-30 and 31-31. The former pass obliquely from the inward portions of the feet 16-16 downwardly and outwardly through the base where they are secured by nuts 32 having springs 33 interposed therebeneath; the bolts 31 are shown as passing vertically downward through the outer portion of the feet 16 and the overhanging part of the base and secured by nuts 34 having springs 35 interposed therebeneath. The holesthrough which the bolts pass are made extra large so as to permit a considerable amount of relative movement.

In the present embodiment I have shown the surfaces 18 as vertical and the surfaces 19 as inclined, and this is my preferred construction although not imperative, since the inclinations can be reversed, or both sides made inclined. In order to adjust the hammer-top relatively to the base one of the wedges is loosened and the other one tightened, care beingexercised not to tighten both wedges to an extent sufiicient to converge the guideways and pinch the hammer. I have illustrated no connection between the lower ends of the uprights, since the inclination of the bolts 30-30 is sufficient to produce the small force-component necessary to keep these members apart and in contact with their respective wedges; although I do not restrict myself to this con struction. The arrangements here shown permit the necessary looseness of the parts to absorb the recoil and rebound and vibration of' the parts, while insuring that at the end of each blow the various parts will return to their initial position; the large been ingsurface provided by my adjustment means affording a maximum of strength and a minimum of wear.

It will be understood that many changes in details and constructions can be made without departing from my inventive idea, wherefore I do not limit 'myself to the details herein shown except as specifically recited in the claims hereto annexed.

Having thus described my invention, what 1 claim is 1. in a drop hammer, the combination with a base and uprights mounted thereon, of a wedge member separate fromboth base and upright interposed. between each of said uprights and a part of said base, and adapted to hold. the uprights against movement laterally outwardly relatively to the, base while permitting free upward movement of said uprights.

2.111 a drop with a base and uprights seated thereon, said base having at each side an inwardly facing abutment, of a wedge interposed between each abutment and its corresponding upright whereby said upright may be held against outward movement laterally rela tively to said base.

I 3. In a drop hammer, the combination with a base and uprights seated thereon, said base having at each side an inwardly facing abutment, of a wedge interposed between each abutment and its corresponding upright whereby said upright may be held against outward movement laterally rela tively to said base, and means for securing saia wedge rigidly to one of the parts between which it is interposed.

4;. In a drop hammer, the combination with a base and uprights mounted thereon, said base having at each side an inwardly facing abutment, ofa wedge interposed between each abutment and its correspnding upright whereby said upright may be held against outward movement laterally 'relatively to said base, the contacting face of said wedge adjacent to said upright being substantially vertical.

5. In a drop hammer, the combination with a base and uprights seated thereon, of a wedge interposed between each of said uprights and a part of said base, said wedge having its thickest portion uppermost and being movable vertically, and means for preventing movement of said wedge in lateral and angular directions.

6. In a drop hammer, the combination.

with a base and uprights seated thereon, said base having at each side an inwardly facing abutment, of a vertical wedge interposed between each abutment and its corresponding upright, and means for securing said wedge to one of the parts between. which it is in terposed.

7. In a drop hammer, the combination with a: base having an upwardly facing suphammer, the combination porting surface and an abutment projecting above such surface, of an upright mounted on said surface at one side of said abutment, a wedge interposed between said abutment and the adjacent face of said upright and having its thickest portion uppermost, and a stem projecting vertically from said wedge and adjustably secured to one of the parts between which it is interposed.

8. In a drop hammer, the combination with a base having an upwardly facing supporting surface and a laterally facing abutment, said surface having a well adjacent said abutment, of a vertical wedge interposed between said abutment and upright and lying at least partially in said well, and means adj ustably securing said wedge to one of the members between which it is interposed.

9. In a drop hammer, the combination with a base having an upwardly facing supporting surface and a laterally facing abut-- ment, said surface having a well adjacent said abutment, of a vertical wedge interposed between said abutment and upright, and means adjustably securing said wedge upright having a foot which rests on said surface and is notched for the reception of said abutment, and a vertical wedge interposed between the base of such notch and the face of said abutment.

11. In a drop hammer, the combination.

with a base having an upwardly facing supporting surface and a laterally facing abutment, of an upright'having a foot resting on said surface and a surface facing said abutment, said base and foot beingformed with tongue and groove perpendicular to said abutment, and wedge means interposed between said abutment and the surface of said upright which faces the same.

In testimony whereof, I hereunto afiiX my signature.

HOWARD TERHUNE.

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