US1767881A - Bit-forming machine - Google Patents

Description

Patented June 24, 1930 f f- UNiTEn STATES PATENT" crance y:IEREMIAH v. GUsrIN, or' LITTLE nooit, ARKANSAS f BIT-romaine MACHINE Application inea August 3o, 1927. I seriaino. 216,452.

This invention relates to( a bit forming the shafts 12 and 13. The axes ofthe shafts machine. f i 12 and 13 are disposed in the same vertical Some of the objects of the present inplane. Itvwill be apparentthat the shafts vention are: to provide a :machine of the 12 and 13 will rotate in opposite directions. 5 indicated character rwith. which uniform A pair of rolls 18 and 19 are respectively shaped bits of comparatively superior and lreyed to the shafts 12 and 13. y.The roll 18 yrefined construction may be produced exis equal in diameter to the diameter of the peditiously and for sharpening used bits roll 19. The roll 18 consists of two sections, of uniform shape; to provide means in the a section 2O and a section 21.v The section l0 machine foraccommodating stock or used 2O lia's'a rim or circumferential'tongue 22, Ae() bits Aof different sizesito provide means iii and a dovetail recess 23 vwhich opens the machine for cutting ofl' any surplus mathiough the yperiphery of the rim or tongue terial or metal in forming a bit; and to pro- 22. Arranged in the recess 23 is a tenivide a machine which is durable yet light pere'd die 24 which is of a shape to conform Y in weight, and which is easy to operate. to the shape of the recess'23 so as te beheld 65 l The nature of the invention and its distherein. The die 24 has a conveXed or arcu; tinguisliiiig features and "advantages will ate stock or work engaging face 25 which appear when the following specification is `iuts out from the peripheral face of the iead'in connection with the accompanying rim 22. The die 24 is also tapered longitudil drawing, in which nally as shown in Fig. 1. The sections 2O 7' Figure 1 is an end elevation of the maand 21 of the roll 18 are securely held vtocliine embodying the features of the present gether by suitable fastening elements 26. invention; the lower roll being shown partly, rlhe roll 19 consists of sections 27 and 28 in Section l f which are also held together by suitable 25 y Fig. 2 is a side elevation; fastening elements 29. The section 27 has 75 Fig. 3 is an enlarged sectionaly View of a circular groove 30 iii the peripheral face 'portions of thev rollsiof the machine and ilthereof, and the said groove 30v -accommolustrating the relationship' of parts immedidatesl the rim or tongue 22 to maintain the ately prior to the application of pressure to alignment of the rolls 18 and 19. The sec- Y K the stock for forming a bit thereon. tion 27 has a recess 31. Arranged'iii the lso Fig. 4 is a sectional view illustrating the recess 31'is a temperedv die 32. The die 32 progression of the rolls to the point of coinhas relatively angularly disposed flat stock pletion'of the bit, i or work engaging faces 33,*and 34. The Fig. 5 is a sectional view illustrating the die 32r also has a recess 35 which presents'a 335 manner in which the stock is 'ejected after transverse straight cutting edge 36. The die S5 thebit has been formed. i 32 also has a groove whichjieceives a por- Fig. "6 are views of a piece of stock betion-of a b olt 37, the latter serving to hold fore and after being acted on by the niatlie'die 32 in place. 'Y .f Chine", In order to hold a piece of stock, such as I 40 Referring now more particularly to the the piecedesignated 38,1n place to beacted 90 drawing, it will be apparent that, in the On'by the ' dies 24 and 32 to form'a bit, 'the illustrated embodiment, the machine in- Section 2r of the roll 19 is provided with cludes a supporting structuie comprising a a transverse recess 39. )iie end o f the recess base 1() and side frames 11 rigidly secured opens through the peripheral face of the i5 to the base 10. Shafts 12 and 13 are resection 27 adjacent the die 32. The opposite e5 spectively mounted in suitable bearings 14 end. of the recess 39 also opens through the and 15 on each of the frames 11. The shaft peripheral face of the section 27 Arranged 12 is the drive shaft and motion is transfor sliding movement in the recess 39 is an mitted from the shaft 12 to the shaft 13 by ejector 4.0. One end of the ejector is adapted spur-gears 16 and 17 respectively keyed to to act on one end of the stock 88 and the yico Opposite end of the ejector is adapted to be acted on by the rim or tongue 22. rlhe ejector is returned to a normal position by means which consists of a stud 4l carried by the section 27 and extending into a slot 42 in the ejector 40, and a retractile spring 43 having one end connected With the stud 4l and the opposite end thereofconnected with the ejector 40. In order to change the normal position of the ejector to accommodate stock or used bits of diiterent lengths there is provided means consisting ot a screw bolt l44 held against ,longitudinal movement but will be apparent that by changinfr the posi- Y on the end of the piece of stock.

tion of the nut 46 the normal positionv ot' the ejector 40 may also be changed. 1 It willv also be apparent that the Vejector-40 serves not onlyto positively e'ect the stock outot` the reCess39 aft-er the bit has been formed thereon, but also serves as an abutment to limit the eXtent to which pieces ot stock of the same length may be successively inserted into said recess, to thus insurez thev production of tools of uniform size and shape.

From the foregoing it Will be apparent that when a piece of stock, such as the piece 38 is arranged in the recess 39 that the inner end ot' the stock Will abut one end ot the ejector 40. In this Way the .stock will be held in place against 1nove1nent. It to be understood that the stock will be heated prior to its introduction into the recess 39. As the rolls 18 and 19 rotate, there will come ya time when the dies 24V and 82 Will come to a coacting relationship to apply pressureto the end ot thestock jutting from the recess 39, and as a consequence a bit Will be Y'formed Such bit is designated 49. Due to the-tact that the dies 24 and 32 are tapered longitudinally the bit will also be tapered as shown most clearly in Fig. 6. The surplus metal, if any, will be cut off by the cut-ting edge 36 thereby insuring a clean, straight and sharpedge. The surplus metal findsits Way into the recess 35 and isl thus kept from getting between the rolls. As the rolls 18 and 19 continue to rotate, there comes a time When the projecting end of the ejector 40' is encountered by a portion of the rim or tongue 2Q, and as a consequence the ejector' is moved7 Vand in turnnioves or ejects the completed bit from the recess 39. IVhen pressure on the ejector is relieved, the spring 48 automatically returns the ejector 40 to its normar position in which the lug. 47 engages the nut 46. This expedient increases the output ot the machine.

In the present instance there are two sets of dies 24 and 32 and stock ejecting mechanisms. It to be understood that the pair ot dies and ejecting mechanism in each case Willbe similar. j

4It is also to be understood that used bits ot uniform shape may be arranged in the recess 39 to be acted on by the dies 24 and S2 for the purpose of sharpening the bits.

I claim:

l. In a bit forming machine, a pair 'of oppositely rotatable rolls, one of said rolls having a recess therein for the reception of Astoclr from which a bit is to be formed, coacting dies respectively carried by said rolls for exerting pressure on the stock in the rotation of the rolls to form the bit, and means carried by the stock receiving roll operated by the other roll in the rotation of both rolls for ejecting the stock from the .recess atter the bit has been formed.

In a bit i'orming machine, a pair of oppositely rotatable rolls, one of said rolls having a recess therein for the reception of stock from which al bit. is to 'be formed, coacting dies respectively carried by said rolls for exerting presssure on the stock in the rotation of the rolls to form the bit, and lmeans operated by one roll in the rotation of both rolls for ejecting the stock from the recess after the bit has been formed.

3. In a bit forming machine, a pair of oppositely rotatable rolls, one ot lsaid rolls having a recess there-inr for the reception of stock from which a bit is to be formed, coacting dies respectively carried by said rolls 'for exerting pressure on the stock in the rotation Yof the rolls to form the bit, and means carried by one roll and operated by the other 'roll in the rotation of both rolls tor ejecting the stock from the recess after the bit hasY been formed.

4. In abit forming machine, a 'pair of oppositely rotatable rolls, one of said rolls having arecess therein for the reception Qt stoclr from which a bit is to be formed, eoacting dies respectively carriedv by said rolls tor exerting pressure on the stock in tbe rotation of the rolls to 'form a bit, an ejector arranged lin said recess for sliding movement, said ejector having a portion which acts on the stock and a portion which is act-ed on by one ot the rolls in lthe'l'otation `et both rolls to move the ejector in one direction to eject ,the stock from the recess, kand means which operates automatically to return the ejector' to its normal position, n

Inv a bit forming'machine, av pair oit' oppositely rotatable rolls, one of said rolls having a recess therein .tor thereception ot stock from which a bit is to be formed, coactingdies respectively carried by said rolls for exerting pressure on the stock in the rotation of the rolls to form a bit, an ejector arranged in said recess for sliding movement, said ejector having a portionA Which acts on the stock and a portion which is acted on by one of the rolls in the rotation of both rolls to move the ejector in one direction to eject the stock from the recess, means Which operates automatically to return the ejector to its normal position, and means for changing the normal position of the ejector.

6. In a bit forming machine, a pair of oppositely rotatable rolls, one of said rolls having a recess therein for the reception of stock from which a bit is to be formed, coacting dies respectively carried by said rolls for exerting pressure on the stock in therotation of the rolls to form the bit, and adjustable means for ejecting thev stock from the recess after the bit has been formed.

7. In a bit forming machine, a pair of oppositely rotatable rolls, one ot' said rolls having a recess therein for the reception of stock from which a bit is to be formed, coacting dies respectively carried by said rolls for exerting pressure on the stock in the rotation of the rolls to form the bit, and means on the stock roll adapted to abut one end of the stock during the bit forming operation, and said means also being operated by the other roll to eject the stock from the recess after the bit has been formed.

8. In a bit forming machine, a pair of oppositely rotatable rolls, one of said rolls having a recess therein for the reception of stock from which a bit is to be formed, coacting dies respectively carried by said rolls for exerting pressure on the stock in the rotation of the rolls to form the bit, means Which serves to abut one end or" the stock during the bit forming operation, said means also serving-for ejecting the stock from the recess after the bit has been formed, and means for adjusting the iirst mentioned means for the purpose of ac commodating stock of various lengths for the purposes specified.

9. In a bit forming machine, a movable stock carrier, means on the carrier adapted to abut one end of the stock during the bit forming4 operation, said means also being operable to eject the stock from the carrier after the bit has been formed, and means for adjusting the lirst mentioned means for the purpose of accommodating stock of various lengths.

10. In a bit forming machine, a die roller having a transverse recess therein for the reception of a piece of stock, a member arranged in said recess which in its normal position abuts one end of the piece of stock during the bit forming operation, yieldable means constantly acting on said member to hold the member in a normal position, said member adapt-ed to be acted on to move the same to eject the stock after the bit has been formed.

Signed at Little Rock, in the county oi Pulaski and State oi. Arkansas, this 23d day of August, A. I). 1927.

JEREMIAH V. GUSTIN.

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