US1832145A - Combined heading and trimming machine - Google Patents

Description

Nov. 17, 1931. R. H. SMITH COMBINED HEADING AND TRIMMING MACHINE Filed Nov. 2, 1928 3 Sheets-Sheet.

INVENTOR ATTORNEYJ R. H. SMITH COMBINED READING AND TRIMMING MACHINE Nqv. 17, 1931.

Filed Nov.

2, 1928 3 Sheets-Sheet 2 INVENTOR ATTORNEYS Nov. 17, 1931. R. H. SMITH COMBINED HEADING AND TRIMMING MACHINE Filed Nov. 2, 1928 3 Sheets-Sheet 3 W WZVY ATTO R N EY6 Patented Nov. 17, 1931 PATENT; OFFICE ROY E. SMITH, OF KENT, OHIO COMBINED HEADIN 'G AND MACHINE Application filed November 2, 1928. Serial No. $316,854.

This invention relates to a combined heading and trimming machine, and. is adapted particularly to the manufacture of bolt blanks.

Thepresent method of forming a head on a bolt of the machine bolt type, which is usually square orhexagonal in shape, is to first make a blank by upsetting or heading one end of a length of wire, and then to trim the head to the proper size and shape. These operations hei'etofore have been performed upon separate machines, with the attendant intermediate handling.

One of the objects of the present invention is to combine in a single machine the two operations of upsetting and trimming.

Another object of the invention is the rovision of a machine vin which the two a oresaid operations are performed in approximately the same length of time that has been required heretofore for the performance of one of them.

A further object is the provision of a machine in which the strikingmovement of the machine slide serves to upset one blank and at the same time to trim the head of the blank which was upset by the next preceding stroke of the slide. I

Still another object is the provision of a compact and simple finger mechanism for transferring blanks.

Other objects and featuresof novelty will appear as I proceed with the description of that embodiment of the invention which, for the purposes of the present application, I have illustrated in the accompanying drawings, in which, v-

Figure 1 is a side elevation of the machine, certain of the parts being removed and others shown in section to more clearly illustrate the invention.-.

Figure 2 is a view partly in section on the line 2-2 of Figure 1, showing the transfer finger and associated parts.

Figure 3 is a horizontal sectional view showing a double cam by vmeans of which the movements of the finger mechanism are produced, the section being taken on a line corresponding to the line 33 of Figure 1.

Figure 4 is a large scale vertical sectional view taken substantially on the line 4-4 of Figure 1, illustrating the finger mechanism.

Figure 5 is a detail sectional view taken on the line 55 of Figured.

Figure 6 is a front elevational view on a larger scale of a portion of the finger operat: ing mechanism.

Figure 7 is a plan view in somewhat diagrammatic form, illustratingcertain features of the invention, and

Figure 8 is a, detail elevational view of the knife which severs the material and carries it into position for heading.

In the drawingsv a portion ofthe frame of the machine is indicated at 10. In the frame is journaled a main shaft 11, rotated in any suitable manner, and adapted to reciprocate a heading slide 12, by any known means, such for instanceas an eccentric and connecting rod or Scotch yokex v In the heading slide 121 mount a hammer 13, and spaced somewhat therefrom and preferably directly below the hammer I mount a.

trimming die 14, the latter being hollow and capable of discharging the trimmed blanks 7 through its rear. end. In a stationary part of the machine opposite the heading slide 12 there is a die block 15, in which is mounted a heading die 16, the opening in the die being in alignment with the passage 17 in the bed of the machine. Adjacent the block 15 there is also secured in the bed of the machine a bracket 18, carrying a hollow punch 19, the opening in the punch being in alignment with the passage 20 in the bracket, which, in turn, is in alignment with a larger passage 21 in the bed of the machine.

If desired, the parts 15 and 18 may be constructed to be inserted or withdrawn from the machine as a unit. The opening in the punch 19 is of the proper size to admit the shank of the blank, and the working surface of the punch is formed of the desired size and shape of the head of. the finished blank, that is, it corresponds in size and shape with the desired cross-section of the blank head. The punching die 14 has an interior surface shaped to fit the punch 19 and is in alignment therewith.

The knock-out mechanism for die 16 comheld after the cut is made.

prises a knock-out rod 22, slidable in passage 17 and having a forward extremity adapted to enter the opening of the die .and eject the blank therefrom. The rear end of the rod 22 is adapted to be engaged by a knock-out lever 23, whose motion in one direction is limited position upon the rod by means of a nut 28 carried by the sleeve and locked in adjusted position by a lock nut 29. -At the proper moment in the receding movement of the slide 12 the sleeve 27 engages lever 23 and causes the latter to push upon the rod 22, thereby ejecting the blank from the die 16.

Wire material enters the machine through a pair of feed rolls, one of which is shown at 30 in Figure 7 The mechanism for driving these rolls intermittently is not illustrated herein as it is entirely conventional and well understood in the art. The required length of wire 31 is fed through a passage in the bed of the machine into the position indicated in Figure 7, the length of exposed wire being determined by a stop 32 of ordinary construction and operation, which swings out of the way of the slide when its work is completed. The measured wire 31 is then cut off by a knife 33, which carries spring fingers 34, by means of which the material is grasped and The knife 33 is mounted in a cross-slide 35 which is movable in guides 36, and carries on its lower side an anti-friction wheel 37 that is engaged by the walls of a cam groove 38 formed in a slide block 39. This block is reciprocated once for each cycle of the machine through a connecting rod 40'from an eccentric 41 upon the cam shaft 11. Obviously the knife" 33 is caused to move in and out transversely of the machine through the mechanism described. Its inward movement is sufiicient to carry the severed wire material from the position shown in Figure 7 to a position directly in front of die 16.

Coming now to the finger mechanism by means of which I transfer blanks ejected from the die 16 into position to be acted upon by the trimming tools, it will be noted that upon the end of the shaft 11 opposite to that which carries eccentric 41, there is a disc 42 in the'rear face of which are formed two cam grooves 4344 (the plate 42 is removed from Fig.1 in order to disclose other parts.) Cam followers 45 and 46, respectively, run in the grooves 43 and 44, these followers being mounted upon levers 47 and 48, which are pivoted at 49 and 50 to a bracket 51 secured to the frame of the machine.

On their lower ends the levers 47 and 48 at its forward end to a crank that is fixed to the outer extremity of a rock shaft 61. The rear end of the shaft 61 is journaled in a bracket 62, which'is secured by any suitable means to the frame 10 of the machine. The forward end of the shaft extends through and is supported in an independently revoluble sleeve 63 provided with a pinion 64 on its rear end and a pinion 65 on its forward end just behind the crank 60. Meshing with the pinion 65 is a sector 66 which swings upon a pintle 67 mounted in the bracket 62. The sector 66 is pivotally connected to the forward end of link 59, by means of which it is adapted to be oscillated.

The pinion'64 meshes with a vertically'ar- -ranged rack 68, to the upper end of which is fixed a finger holder 69. An elongated pinion is mounted for rotation in the bracket 62, being arranged arallel to the rack 68 and preferably in rat er close proximity thereto. Within a hollow portion of the bracket 62 the shaft or pinion 70 carries a spiral gear 71 which meshes with a second spiral-gear 72 that is fixed upon rock shaft 61. The pinion 70 extends through an opening in the finger holder 69, being free to turn with respect to the holder and constituting a. guide for the holder as the latter moves up and down. v

t The holder 69 is provided with an inclined guide-way in which is mounted to slide a rack 7 3, that carries on its free end the transfer finger. The finger itself may comprise a rigidpiece with a V-slot 74 in its free end and a pair of levers 75 which are beveled off and hooked at their forward ends in order to properly grasp the work. These levers are pivoted to the rigid portion of the finger at the points 76, and their rear ends are resiliently forced apart by .a coil spring 77 or the like.

' Operation Further forward movement of the slide 12 causes the hammer 13 to force the wire 31 as far as it will go into the die 16 and then to upset the outer end of the wire to form a head.

5 The blank being thus formed, the slide 12 starts on its return stroke. During this stroke the sleeve 27 on red 26 engages lever 23 and the latter pushes upon rod 22, forcing the blank out of the die 16. Before the ejection of the blank is completed, however, the transfer finger moves inwardly causing the hooks on the end of levers 7 5 to ride over the shank of the blank and grip the same against the sides of the V-slot 7 4. The rack 68 is then actuated by the pinion 64, so as to move vertically downward, carrying the blank into position in front of the trimming punch 19. Again the slide 12 advances and the trimming die 14 strikes the head of the blank forcing the shank of the latter into the opening of the punch 19. \Vhen the blank is thus engaged the pinion 70 of the finger mechanism rotates and operates through rack 73 to withdraw the transfer finger. When the finger is out of the way further forward movement of the slide 12 drives the blank into the punch 19 until the head of the blank engages the end of the punch. Thereafter the final movement of the slide causes the die 14 to move over the end'of the punch 19, and the head of the blank is thereby trimmed. The engagement between the die 14 and the head of the'blank being very snug, the trimmed blank remains in the die 14 as the slide 12 moves backwardly. This blank is forced through the hollow die 14 on the next operating stroke of the slide by the blank then in the punch 19. A suitable hopper or container (not shown) receives the trimmed blanks as they drop from the die 14.

With regard to the finger mechanism it may be remarked that the rack 68 and pinion 70 may be operated one at a time so as to produce movement of the finger either vertically or in the line of the rack 7 3, or if desired, the rack 68 and pinion 70 may be operated simultaneously so as to bring about what might be termed a composite movement of the finger, it being possible to obtain any desired movement by properly laying out the cam grooves 43 and 44. It will also be obvious that the rack 73 may be arranged at a right angle to the pinion 70 if desired.

\Vhile in the foregoing description and in the drawings I have disclosed more or less in detail one embodiment of the invention. such detailed disclosure is not to be construed as a limitation of the invention.

Having thus described myinvention what I claim is:

1. In a machine for heading and trimming bolt or screw blanks having straight-sided heads, two blocks relatively reciprocable, a heading die and a hollow trimming punch mounted in one of said blocks, a heading hammer and a trimming die mounted in the other block, means for producing relative reciprocation of said blocks, means for ejecting a blank from said heading die and inserting another blank between hammer strokes, means for transferring the headed blank to said trimming punch while said blocks areseparated, the head of each trimmed blank remaining in said trimming die as the blocks recede from each other and acting as a ram for pushing the succeeding blank into the hollow trimming punch as the blocks approach each other.

2. In a machine for heading and trimmin bolt or screw blanks having a straight-side heads, a trimming die hollow throughout its pushing the succeeding blank into the hollow punch as the tools approach each other.

3. In a combination bolt heading and trimming machine, a trimming die through which the blank is to be driven endwise, a hollow punch operatively associated with said die, means for causing relative movement of said punch and die, said punch being adapted'to push a blank into the die and th leaving the shank of the blank pr jecting from the die, a transfer finger adapted to grasp a headed blank and position the same between said projecting shank and said hollow punch when the latter are in their separated positions, the projecting shank of the first blank being adapted to push the second blank into the hollow punch, after which the second blank pushes the first blank through said die.

- In testimony whereof, I hereunto aflix my signature.

ROY H. SMITH.

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