US1994242A - Machine for making bolts and the like - Google Patents

Description

March 12, 1935. w, CLOUSE 1,994,242

MACHINE FOR MAKING BOLTS AND THE LIKE Filed May 9, 1933 20 a A; g 27 29 Zhwentor MAL/AM Z. [Am/.55.

a description of which follows, not being limited Patented Mar. 12, 1935 MACHINE FOR MAKING BoL'rs AND THE LIKE William L. Clouse, Tiflin, Ohio, assignor to The National Machinery Company, a corporation of Ohio Application May 9, 1933, Serial No. 670,108

14 Claims.

adapted for certain installations and of a simpler construction. 1

In the drawing:

Figure 1 is a plan view of the forward end of a bolt making machine showing the transfer mechanism of the present invention applied thereto; and i t Figure 2 is a sectional elevation taken substantially on the line 2--2 of Figure 1.

Referring to the drawing in detail, I have illustratedmy invention in connection with a machine of the type shown, in the aforesaid copending application, the machine illustrated being particularly adapted for the manufacture of bolts, screws and the like. 'me'ral 5 designates a bed frame having at its forward extremity a die breast 6. A header slide 7 is mounted to reciprocate longitudinally of the frame 5, and in order to carry out the process of bolt manufacture as set forth in my above application, said slide is provided with a plurality of punches 8, 9 and 10 adapted to co-operate with dies 11, 12 and 13 in the breast plate 6. The die 11 is an extrusion die into which the bolt blank is pressed by the punch 8 to reduce the diameter of the major portion of the blank; the die 12 is also an extrusion die for extruding the threadreceiving portionof the bolt shank, the cooperating punch 9 being a heading tool which presses the blank into the die and also upsets the previously unextruded portion to form a head; while the die 13 is aholding die which cooperates with the hollow trimming punch 10 which trims the upset heads of the blanks to the desired polygonal form. 'It will be understood, of course, that any de sired combination and types of punches and dies.

may be used, the improved transfer mechanism,

by the illustrated embodiment. It will likewise be understood that the general construction and type of the machine may be varied to suit the particular article being made.

Wire or rod stock S is fed through a guide 14 and the bed frame 5 and engages an adjustabh stock gauge 15. A cut-off arm 16 is arranged to engage the stock, shear off blanks of the desired The reference nu-.

length and carry the same into alignment with the die 11. Arm 16 is pivotally anchored to the bed frame 5 at 17 and is oscillated by a cam 18 contacting a cam roller 19 rotatably mounted at the one end of said arm. Cam 18 is secured on a cam shaft 20 which extends back and is driven from the main crankshaft of the machine, not here shown.

, During each cycle of the machine, the arm 16 is rocked by cam 18 to shear off a blank and carrytlie same in'to alignment with the die 11 during the time the header slide 7 is retracting and then returns to its initial position to receive another'blank while the slide is moving forward into engagement with the work. Although I prefer to use this cut-oil arm, it will be understood that my present invention is not limited thereto and that any desired type of cut-off mechanism may be used.

The transfer mechanism which comprises the features of the. present invention is adapted for carrying blanks from the die 11 to the die 12 and from the die 12 to the die 13, and as shown in its preferred form consists of. an oscillating and reciprocating transfer finger support or beam 21 which is slidably and pivotally mounted at its one extremity as by having a slot 22 riding on a bearing roll 23 mounted on an upstanding bracket 24 fixed to or formed integrally with the stationary frame or bed plate of the machine. At its opposite end, the support or beam 21 is provided with means for rocking it on its pivotal mounting such as the link 25 pivoted to a lever 26 which in turn is pivotally anchored as at 27 to the frame or bed plate 5. The. link, as shown, is provided with. ball and socket connections 25a to accommodate the reciprocatory and oscillatory movement of the beam 21. Lever 26 is actuated in any suitable way, as by means of a cam 28 which is mounted on a shaft 29, the latter extending back and being driven from the main crankshaft of the machine or through the medium of any other suitable synchronized driving 'connection. If desired the cam may be positioned on the cam shaft 20.and the motion transmitted to the free end of the beam 21 by suitable connections extending laterally across the machine. Cam 28 contacts with a roller 30 rotatably mounted on lever 26. It will be seen that when cam 28 rotates, it actuates lever 26 and effects an oscillatory move;- ment, or raises and lowers the support or beam 21 about its sliding pivotal connection 23. To effect a reciprocatory movement of the support or beam 21, the latter is connected to the cut-off arm 16 by means of a connecting rod 31.

The blanks are gripped and carried from one die to another by means of transfer fingers 32, 32a and 33, 33a. These fingers are each pivotally anchored to the support or beam 21 as at 34. At their upper ends, compression springs 35 are positioned between the fingers to continually urge the gripping extremities thereof toward one another, or to a gripping position. The lever portions 32b and 33b of the fingers 32 and 33 are each preferably shorter than the corresponding portions 320 and 330 of the fingers 32a and 33a,

so that the springs 35 normally effect a greater leverage force on the fingers 32a and 33a than on the fingers 32 and 33. Abutment or set screws 36 are threaded through bracketstl'l formedv on the beam or support 21 and are adapted to abut the fingers 32a and 33a. By adjusting these screws, the gripping portions of the sets of fingers may be adjusted so that they will register correctly with the openings in the dies 11, 12 and 13. The ends of the fingers are preferably provided with hardened wear plates as at 38, 3811 which are formed with beveled end surfaces to permit the fingers to be forced open and snapped over a bolt blank.

In operation, during each cycle of movement of the header slide 7, the cut-off arm 16 acts to shear off a blank and carry it into alignment with the die 11, while the header slide is retracted. During this movement, the transfer finger-support or beam 21 is caused to move laterally due to itslink connection with the arm 16 so that the fingers 32, 32a move from a position in alignment with the die 11 to a position in alignment with the die 12 and the fingers 33, 33a similarly move from the die 12 to the die 13. The header slide again approaches the dies and engages the various blanks to start their movement into the dies. At this time cam 28 contacts roller 30 and effects an upward oscillatory movement of the support or beam 21, thereby pulling upwardly on the fingers 32, 32a and 33, 33a, causing the latter to snap off of the blanks, leaving the latter in the dies 12 and 13 as the header slide continues its forward movement to press the blanks into the dies and perform the various operations upon the same. Arm 16 then moves to the left carrying with it support or beam 21, the cam 28 in conjunction with the arm 16 causing said support or beam and the transfer fingers carried thereby to describe an arc, so that the fingers lower and move down into registration with the dies 11 and 12 and snap over blanks held therein.

It will be understood that numerous modifications and changes and re-arrangements of the structure may be adopted within the scope of the invention as defined by the appended claims.

I claim:

1. In a bolt making machine, a bed frame, a plurality of aligned dies supported by said frame, a reciprocating header slide having a punch cooperating with each die, means for feeding wire or rod stock, a cut-off arm movably mounted on said frame and adapted to cut off lengths of stock and carry the same to the first of said dies, coacting transfer fingers adapted to engage and releasably retain said lengths of stock, a support for said fingers having apivotal and slidable mounting at one extremity and means connected to its opposite extremity for oscillating said support, and means connected to said arm for reciprocating said support simultaneously with its oscillatory movement to cause the transfer fingers to transfer lengths of stock from one die to another in synchronism with the movement of said slide.

2. In a bolt making machine, a bed frame,- a plurality of aligned dies supported by said frame, a reciprocating header slide having a punch cooperating with each die, means for feeding wire or rod stock, a cut-off arm mounted on said frame and arranged to be moved to cutoff lengths of stock and carry the same to the first of said dies, a plurality of sets of co-acting transfer fingers adapted to engage and releasably-retain bolt blanks formed from the lengths of stock, a slidably and pivotally mounted support for said sets of fingers, and means for oscillating and reciprocating said support to thereby move the sets of transfer fingers as a unit into alternate blankgripping registration with said dies and effect transfer of blanks from one die to another in synchronism with the movement of said slide.

3. In a bolt making machine, a bed frame, a plurality .of aligned dies supported by said frame, a reciprocating header slide having a punch cooperating with each die, means for feeding wire or,

rod stock, a cut-off arm movably mounted on said frame and adapted to cut off lengths of said stock and carry the same to the first of said dies, a plurality of sets of co-aoting transfer fingers adapted to have a snap engagement with blanks formed from the lengths of stock, a common supporting member for said sets of fingers, said supporting member being slidably and pivotally anchored at one extremity and extending laterally over said dies,'means for oscillating said memher, and means connectedto said arm for simultaneously reciprocating saidmember to thereby move said sets of fingers as a unit in an arcuate plane to effect transfer of blanks from onedie to another in synchronism with the movement of said slide. 7

4. In a bolt making machine, a bed frame, a plurality of aligned dies supported by said frame, a reciprocating header slide having a punch cooperating with each die, means for feding wire or rod stock, means for cutting off lengths of stock and carrying the same to the first of said dies, a plurality of sets of co-acting transfer fingers adapted to have a snap engagement with bolt blanks formed from the lengths of stock, a supporting beam on which said fingers are mounted, and means for reciprocating and simultaneously oscillating said beam to effect transfer movements of said fingers with respect to said dies in'synchronism with themovement of said slide.

5. In a bolt making machine, a bed frame, a plurality of aligned dies supported by said frame, a reciprocating header slide having a punch cooperating with each die, means for feeding wire or rod stock, an oscillating cut-01f arm pivoted to said frame and adapted to cut off lengths of stock and carry the same to the first of said dies, a plurality of sets of co-acting transfer fingers adapted to have a snap engagement with bolt blanks formed from the lengths of stock, a beam positioned above said dies and adapted to serve as a support for said fingers, said beam having a slidable and pivotal connection at one extremity with a relatively stationary part of the machine and having said sets of fingers mounted on its opposite free extremity in positions such as will effect approximate blank-gripping registration with said dies, cam means for oscillating the free end of said beam, and meansconnectedto said arm for simultaneously reciprocating. said .beam to thereby effect transfer movements of said fingers with respect to said dies.

6. In a bolt making machine, a plurality of aligned dies, a plurality of sets of transfer fin! gers adapted to transfer bolt blanks from one die to another, a movable support for said fingers, each set comprising a pair of fingers which are separately pivoted to said support, each finger being provided with a lever portion extending between the extremities of said lever portions for normally urging'the blank-gripping extremities of the fingers toward one another, and an adjusting and abutment screw carried by said support and adapted for contact with the finger having the longest lever portion for adjusting the said gripping extremities relative to said dies.

'7. In a bolt making machine, a plurality of aligned dies, a plurality of sets of transfer fingers adapted to transfer bolt blanks from one die to another, a movable support for said fingers, each set comprising a pair of fingers which areseparately pivoted to said support, each finger being provided with a lever portion extending beyond its pivotal connection, one of said lever portions being longer than the other to effect relatively greater leverage with respect to the remaining finger, an abutment for limiting the arcuate movement of the finger having the longer lever portion, and spring means engaging said lever portions for urging the blank gripping extremities of the fingers toward one another.

8. ,In a multiple station machine, transfer mechanism for moving blanks from one station to another in said machine including an elongated supporting bar having a pivotal and slidable mounting on said machine, a plurality of sets of transfer fingers on said bar for. engaging a plurality of blanks to move the same from one station to another, means for rocking said bar on its pivotal mounting about an axis substantially perpendicular to its length, and means fdr sliding said bar relative to said machine;

9. In a multiple,station upsetting machine having a plurality of die stations arranged in a straight line. transfer mechanism for moving blanks from one station to another including a bar arranged substantially parallel with. the line of die stations and having a pivotal and slidable mounting on said machine, nieans on said bar for engaging-blanks to move the same from one die station to' another, means for rocking said bar on its pivotal mounting toward and away from said die stations, and means for sliding said bar. 10., In a multiple station upsetting machine 7 having a plurality of'die stations arranged in a straight line, transfer mechanism for moving blanks from one station to another including a bar arranged substantially parallel with the line of dies, one end of said bar being pivotally and slidablymounted on said machine, means on'said bar intermediate its ends ,for engaging blanks to move the same from one station to another,-

means for rocking said bar on its pivotal mounting to swing the free end thereof toward and away from said line ofdie stations, and means for sliding said bar longitudinally.

11. In a multiple station upsetting machine having a pluralityof dies arranged in astraight blank engaging means on said bar to move a blank from the first die into alignment with the second die, blank engaging means on said bar to move a blank from the second die to thethird .die, means for rocking said bar on its pivotal mounting to bring said blank engaging means into p ition to engage blanks ejected from the first and second dies, respectively,.and means for sliding said bar to move the blanks to the second and third dies, respectively, and to return said bar to its initial position.-

12. In a multiple station upsetting machine having a plurality of dies arranged ina straight line and a reciprocating slide having a plurality of hammers for co-operating with said dies to upset solid metal blanks, means for feeding rod or wire stock, cut-off mechanism for cutting'oil lengths 'of said stock and carrying the same into alignment with the first of said dies, a bar pivotally and slidably mounted on said machine, blank engaging means on said bar to move a blank from the first dieinto alignment with the second die, blank engaging means on said bar to move a blank from the second die to the third die, means for rocking said bar on its pivotal mounting to bring said blank engaging means into position to engage blanks ejected from the first and second dies, respectively, and means for sliding said bar tov move the blanks to the second and third dies, respectively, and to return said bar to its initial position during the engagement of the hammers with the blanks.

13. In a multiple station upsetting machine having a plurality of dies arranged in a straight line and a reciprocating slide having a plurality of hammers for co-operating with said dies to upset solid metal blanks, means for feeding rod or wire stock, cut-off mechanism for cutting of! lengths of said stock and carrying the same into alignment with the first of said dies, a bar pivotally and slidably mounted on said machine, blank engaging means on said barto move a blank from the first die into alignment with the second die, blank engaging means on said bar to move a blank from the seconddie to the third die, means for rocking said bar on its-pivotal mounting to bring said blank engaging means into position to engage blanks ejected from the first and second dies, respectively, and means connecting said bar to saidcut-off mechanism to effect sliding movement of said bar and transfer of the blanks from the first die to the second,

and from the second die to the third.

14. In a multiple station upsetting machine, a frame havinga pair of dies mounted therein, means for transferring blanks from one of said dies to the other comprising a bar having a sliding and pivotal mounting upon said frame, a pair of co operating transfer fingers carriedv by said bar and having gripping seats for gripping and holding a blank, means for causing said bar to slide and pivot upon its aforesaid mounting including a driving member connected to said bar adjacent an end thereof, said connection being spaced from the pivotal .point of said sliding and pivotal mounting a greater distance than said pivotal point is spaced fromsaid gripping seats throughout the operating cycle of the transfer means.

' L. CLOUSE.

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