US2318825A - Cutoff and transfer mechanism - Google Patents

Cutoff and transfer mechanism Download PDF

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Publication number
US2318825A
US2318825A US437417A US43741742A US2318825A US 2318825 A US2318825 A US 2318825A US 437417 A US437417 A US 437417A US 43741742 A US43741742 A US 43741742A US 2318825 A US2318825 A US 2318825A
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wire
slides
station
workpiece
slide
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US437417A
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Wilcox Richard Lester
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Waterbury Farrel Foundry and Machine Co
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Waterbury Farrel Foundry and Machine Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/06Cutting-off means; Arrangements thereof

Definitions

  • Figure 1 is a transverse sectional view of a conventional header or the like, with this improved mechanism associated therewith, the parts in section being taken generally upon line ll of Figure 5;
  • Figure 2 is a view of one end of the header
  • Figures 3 and 4 are views of the die block, outter slides, cutters and parts of the transfer mechanism, the parts in section being taken generally upon a line extending through the wire line and push-out line;
  • Figure 4 is a perspective view of one form of feed stop finger
  • Figure 5 is a fragmentary plan view of a portion of a conventional header or the like
  • Figure 6 is a sectional view of a portion of the header frame, die block and associated parts, taken generally upon line 6-6 of Figure 1;
  • Figures 7 and 8 are perspective views of tw forms of cutter knives
  • Figure 9 is a fragmentary perspective view of the cutter knives and. slides
  • Figure 10 is a fragmentary sectional view of the gib, slide and associated parts, the parts in section beingtaken generally upon line III-l0 of Figure 1;
  • Figure 11 is a transverse sectional'view of the header or the like, the parts in section being taken generally upon line i l--l I of Figure 5, with the cutting mechanism omitted for clearing;
  • Figure 12 is a view of a portion of the header frame, feed cam and lever mechanism
  • Figure 13 is a view of a portion of the transfer mechanism
  • Figure 14 is another view thereof, the parts in section being taken generally upon line I l-l4 of Figure 13;
  • Figure 15 is a view of a portion of the transfer mechanism, the parts in section being taken generally upon line l5l5 of Figure 11;
  • Figure 16 is a view of the workpiece gripping portion of the transfer mechanism.
  • I0 indicates the frame of a header, upsetting machine or the like, having a die block l l, in which is a fabricatin die I2 or the like.
  • This die lock may be held rigid in the frame by any one of many convenient means well known in the art.
  • a rod l9 Between these lugs; and passing through an opening in the gib I5, is a rod l9, one end of which bears against the lug l1, and the other end of which passes through the lug l8, with a nut 20 threaded on the outer end thereof.
  • the nut 20 on the rod I9 is tightened. This compresses the spring 23 and relatively the tension against the lugs l1 and It on the slides l3 and I4, so that they may later be brought together free from contact with the V roll59 and the adjusting screw 52. .As so positioned, the entire die block unit may be removed the lug I1 and limits movement of the slide I3 in one direction. Both slides are reciprocated by positively actuated mechanism.
  • Such mechanism for moving the slides to the left, when viewed in their relative positions, as shown in Figure 1, comprises in part a rock arm 25, carrying a cam roll 59, fixed on a rock shaft 26, journaled in the frame I0, a rock arm 21, also upon the shaft, to which the connection 28 is hinged, by a pin 29 or the like. J ournaled on the pin 30, fixed in the frame ID or other rigid part, i a rock arm 3
  • the cam roll rides against the face of a cam 34 fixed upon the side shaft 35.
  • Between the yokes 28 and 32 is a connection rod 35, threaded in the yoke 28 and passing through an'opening in the yoke 32, with lock nuts 31 on its inner end.
  • a spring 39 Between the collar 38 on the connection rod 35 and the yoke 32, is a spring 39. Fixed to the frame I is a bracket 40, within which aplunger M is movably mounted and partly surrounded by a spring 42, between the screw 43 andga shoulder on the plunger. One end of this plunger. engages a shoulder (Fig. 2) on the rock arm SI and exerts a tension thereon that holds the'cam roll 33 against the face of cam 34-.
  • the connection rod 36 and associated parts provide means for adjustment of, the position of the rock .arm 25, by which the slides I3 and I4 are moved in one direction (toward the left in Figure 1).
  • a plunger 59 Movably mounted in the frame I0 is a plunger 59 connected by a link I with the rock lever 45, and whereby areciprocating motion is imparted thereto from. the cam 44.
  • An adjusting screw 52 is threaded in the inner end of the cut-off plunger 5
  • a cutter I6 Secured to the inner adjacent end of each of L the slides I3 and I4, by'screws or other convvenientmeans, is a cutter I6. Inthe inner end of: each of these cutters is a recess BI that is substantially the same shape in cross section as a portion of the workpiece.
  • the slides I3. and I4 with the cutters I Bnthereon are in a position wherein the. opening 51 between the innerends of the cutters and formed bythe recesses SI of the same shape in cross section as the workpiece, is opposite and in register .with the wire line, that is, the line of feed of'the'wire through the cut-off die 55.
  • the screw 52 in the plunger 55 is adjusted so that the cutter I6 connected with the slide I4 stops just short of the push-out line.
  • the push-outpin 54 projects the workpiece from between the cutters into the fingers of the transfermechanism.
  • the slides'l3 and I4 are returned so that the opening 57 again-registers with'the wire line, through the action of the cam 34, arm; 25 and associated parts.
  • the slide I3 is actuated independently until the cutter thereon engages the cutter on the'slide I4.
  • Both slides and cutters now move as a unit until the opening 51 is approximately in register with the wire line. This is due to the fact that the rock arm 25 discontinues its pressure upon the slide I3, but the cut-off plunger 5
  • cutters are preferably constructed with a body portion, through which are openings to receive the fastening screws and a head portion 60 of greater thickness thanthe body portion, in the end face of which is the recess 6! to receive the wire, and to retain and carry it-from-one station to the other.
  • the feed stop 55 is outside of the cutter, as in Figure 6.
  • a feed stop 62 is used, having a relatively narrow tip 64.
  • each cutter I6 is provided with a slot 63 of the desired depth, and into which projects the tip 64 of the feed stop that is in the path of the wire as it is fed through the cut-off die 56 into the opening 51 between the cutters when in register with the wire line.
  • the thickness of the head portion 60 of these cutters is such that they give great stability to the projecting portion of the wire therebetween as the same is cut off from the wire length. This is one favorable factor in insuring a rigid holding of the wire during the cut-off operation, an ,essentialin producing a square end workpiece.
  • This relative thickness of the cutter head is possible in this invention because the workpiece is not presented to the fabricating die by the cut-off knives or cut-;
  • a rock arm 65 On the rock shaft 26 is a rock arm 65, to which is secured a finger block 66, carrying a finger
  • a latch 68 held arm fi'i. by a bolt 69 under the tension of a spring Hi.
  • a notch 1! In the end of the arm 61 is a notch 1!, open at one side, and over which projects an end of the latch 68, thus forming a notch H for the recep tion of a workpiece.
  • Thefinger block 66 is adjustable on the rock arm 65 and the finger arm 67 on the finger block 66, and whereby the notch ll may be moved into alignment with the center of the fabricating die I 2, and thus bring the work- On the side shaft is a cam hub 80, to which is secured the cam 8
  • a rock arm 88 Journaled on the pin 84, fixed in the frame H3, or other rigid part, is a rock arm 88, carrying a cam roll 85, which rides against the face of the cam 8
  • an adjustable connection comprising a rod 92, secured by a yoke 9! pivotally connected with the rock arm 9i and by a yoke 93 to the rock arm 88.
  • a spring 95 Between the yoke 93 and a collar 94 on the rod 92 is a spring 95, which will yield when the lug I9 is in contact with the stop screw 18 when the apparatus is set for short workpieces.
  • the timing of the transfer is such that the finger arm 6] is quickly withdrawn from itsposition in front of the fabricating die I2 and earlier or later to clear the advancing punch so that very short length blanks may be accommodated; For cut-a;
  • the notch H is carried above the push-out station. When in such a position it dwells while the workpiece between the cutters is carried over from the cut-off station in front of the push-out pin 54.
  • the finger arm 61 now moves down and snaps onto the workpiece which rests in the notch H under slight pressure from the latch 68.
  • the pusher pin 54 is withdrawn quickly and the arm arm 65 swings to the left, as shown in Figure 11, causing the finger arm 61 to swing downwardly carrying the workpiece in the notch'll into register with the fabricating die l2, at which time the lug 19 contacts the stop screw 11 and is adjustable for position as thespr ing 98, surrounding the rod 89 will yield'for such adjustment.
  • the cam BI and cam segment 83 are utilized for transferring both short and long workpieces.
  • the finger arm 61 When transferring a workpiece shorter in length than the thickness of the cutters, the finger arm 61, with the notch in its outer end, stops-at the push-out station, and then the spring 95 is compressed to allow the full stroke of the cam BI and cam segment 83.
  • the stop screw 18 When cutting off workpieces longer than the thickness of the cutters, the stop screw 18 is not utilized and the full stroke of the cam,8l and cam segment 83 is used as above described.
  • the cam segment 83 is adjustable on the cam 81 through the screws 82 and slot' 96, to give an adjustment of timing to the rock arm 65, so that the finger arm 61 can be returned from the fabricating die l2 earlier or later as may be required.
  • a workpiece is cut from a wire length witha severed face that is at a right angle to its length.
  • Such right angle or square face is advantageous in future operations upon the workpiece.
  • the end of the wire in the cut-off die also has a perfectly square face and becomes one end of the next succeeding workpiece cut therefrom, thus both ends of th workpiece are at right angles to the length of the workpiece and parallel with each other.
  • the parts upon which this duty comes mustbe relatively heavy and substantial to properly perform their functions.
  • the workpiece when out off, however, is relatively light. Therefore, the mechanism that transfers the workpiece from the cutoil' mechanism to the fabricating dies is also relatively light.
  • the transfer mechanism receives the workpiece the cut-off mechanismreturns to the wire line anism carries the workpiece intoline with the fabricating die.
  • the timing is easier and an increased speed of operation and output is achieved.
  • the transfer arm is positively actuated through a link connected with the rock arm at a point distant from the axis of rotation of the rock arm, thus inducing ease and simplicity of action as distinguished from the conventional type of transfer mechanism, wherein the rock arm is fixed on a rock shaft and actuated thereby.
  • the header is operated at an increased speed with resulting increased output. While operating under this increased speed, if perchance a workpiece when ejected from the fabricating die does not drop by gravity suificiently fast to be out of the path of another punch, the transfer mechanism, carrying the new workpiece will engage it and assist in driving the workpiece downward.
  • the second punch at one side of the first punch is in a horizontal line and the workpiece only clears a single punch as it drops by gravity or is forced downwardly by the transfer mechanism.
  • mechanism for cutting off a portion of a length of wire, rod or the like at one station comprising in part companion cutters which receive and grip the wire therebetween during the cut-off operation and while so gripped cut off the gripped portion and carry it by a straight line movement-to another station; and means for separating the cutters at both stations, whereby the wire and-work pieces may move freely therebetween.
  • mechanism for cutting off a portion of a length of wire, rod or the like at one station comprising in part companion cutters which receive *and grip the wire therebetween during the cut-off operation and while so gripped cut off the gripped portion and carry it by a straight line movement to another station; and resilient means that actuate the cutters when in register with the said stations and whereby the cutters are separated at both stations a sufiicient distance to permit the wire and workpieces to move freely therebetween.
  • mechanism for cutting off a portion of a length of wire, rod or the like, at one station comprising in part a die block, pluralslides mounted'thereon to move in a substantially straight line, a cutter upon each slide, between which the wire is receivedand rigidly held while said portion is beingcut off and thereafter carries it to another statin,-one slide having an over movement and one slide a short movement at each station, whereby the cross area of that portion of the cuttersthat receives the rod is greater than that of;the rod and whereby the 7 wire rod and workpiece may move freely therebetween.
  • mechanism for cutting off a portion of a length of wire rod or the like comprising in part plural 1 slides; a cutter associated with each slide and bebetween which the wire is rigidly held during the cut-off operation; a member between said slides;
  • mechanism'for cutting off a portion of a length of wire, rod or the like comprising in part plural slides, each. having a lug thereon; a cutter associated with each slide and between which the wire is rigidly held during the cut-off operation; a member passing through the lug on one slide and engaging the lug on the other slide; a spring between said member and one of said lugs, whereby'tension is-exerted on said member to separate said slides.
  • mechanism for cutting off a portion of a length of wire, rod or the like comprising in part plural slides mounted in a rigid part to move in a substantially straight line; a fixed element holding the slides within said rigid part, a member passing through said fixed element, engaging a shoulder on one slide and passing through a part on the other slide, and tension means to separate said slides.
  • a slide a cutter having a body portion and a head portion of greater thickness'than the body portion with a blank holding recess in the end face of the head portion; and means for securing the cutter to the slide in engagement with the thinner portion of the cutter.
  • a slide having a body portion, and a head portion of greater thickness than the body portion with a holding recess in the end face of the head portion, and a slot extending part way through the body and head portions to receive a stop member; and means for securing the cutter to the slide in engagement with the thinner portion of the cutter.
  • mechanism'for cutting off a portion of a length of wire, rod or the like, at one station comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other.
  • a device of the character describedmechanism for cutting off a portion of a length of wire, rod or the like at one station comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween durlngthe cut-off operation and transfers it to a second station; separate cam actuated means of wire, rod or the like at one station, comprising in part, plural slides mounted to move in a substantially straight line, a cutter upon each slide, between which the wire is received and rigidly held while said portion is being cut off and thereafter carried to another station; and adjustable stop means for limiting the movement of the slides in one direction.
  • mechanism for cutting off a portion of a length of wire, rod or the like at one station comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other, each of the cam actuated means yielding to permit movement of the slides in the direction opposite to that actuated thereby.
  • mechanism for cutting off a portion of a length of wire, rod or the like at one station comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other, said cam means having a slight over movement to permit separation of the slides by independent means.
  • mechanism for cutting off a portion of a length of Wire, rod or the like at one station comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-01f operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other,
  • one of said cam actuated means having a reciproeating member adjacent to its actuated slide and the other cam means having a rock member adjacent to its actuated slide.
  • mechanism for cutting off a portion of a length of wire, rod or the like at one station comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other, one of said cam actuated means including as a part thereof a reciprocating member adjacent to its actuated slide and the other cam means including as a part thereof a rock member adjacent to its actuated slide; and an adjustable member between the reciprocating member and its actuated slide to vary the relative positions thereof.
  • mechanism for cutting off a portion of a length of wire, rod or the like at one station comprising in part companion slides, a cutter On each slide which receives and holds the wire therebe tween during the cut-off operation and transfers it to a second. station; separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other; and means for compensating forany inaccuracy in the timing of said separate cam actuated means.
  • mechanism for cutting off a portion of a length of wire, rod orhte like at one station comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; transfer means for carrying the workpiece from the last mentioned station to a station in a diiferent plane through the arc of a circle; and means for actuating said slide and transfer mechanism, whereby the transfer mechanism will carry the workpiece to the last men tioned station while the slides are returning for the next succeeding workpiece.
  • mechanism for cutting off a portion of a length of wire, rod or the like at one station comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; transfer means for carrying the workpiece from the last mentioned station to a station in a different plane; means for actuating the slides and transfer mechanism, whereby the transfer mechanism will carry the workpiece to the last mentioned station while the slides are returning for the next succeeding workpiece; means for controlling the transfer mechanism, whereby it will be held out of alignment with the workpiece while the workpiece is being partially ejected from the slides and then moved into engagement with said workpiece.
  • mechanism for cutting off a portion of a length of wire, rod or the like at one station comprising in part .companion slides,.a cutter oneachv slide which receives and holds .thelwiretherebe- V tween during the cut-off operation and transfers: it to a second station; andaseparate cam.
  • one of said cam actuated means having a re-..
  • the fabricating die ucomprising a movably mounted fingers carrying. member; and means for moving the finger from the push-outstation to the fabricating dieand from thefabricating dieto thezpush+ out station through. an element; connected with the carrying member and having a reciprocating.
  • a die block mechanismiorcutting 01f alength of wire-rod or the'like at one station on the die block, comprising in part companion slides, a cutter in each slide which receives and. holds the wire therebetween during the cut-off operation andtransfers .it to a second station on thedie b1ock;:and. separate cam actuated means outside of the;die.block for moving the slides in both directionswith-the cutters in engagement witheach other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Description

May 11, 1943.
R. L. WILCOX CUTOFF AND TRANSFER MECHANISM w nu I Filed April 2. 1 942 4 Sheets-Sheet l F t/10rd [es/er WYENTOR //cox HTTORNEY May 11, 1943. R. L. WILCOX CUTOFF AND TRANSFER MECHANISM Filed April 2, 1942' 4 Sheets-Sheet 2 F HM HTTORNEY May 11, 1943. R. WILCOX CUTOFF AND TRANSFER MECHANISM Filed April 2, 1942 4 Sheets-Sheet 3 INVEI ITOR lP/c/rara/ l .s/er W/Ycox arToENEY ll Z 9". I IZ/WA May ll, 1943. R. L..WILCOX CUTOFF AND TRANSFER MECHANISM Filed April 2, 1942 4 Sheets-Sheet 4 Patented May 11, 1943 CUTOFF AND TRANSFER MECHANISM Richard Lester Wilcox, Waterbury, Conn., assignor to The Waterbury Farrel Foundry and Machine Company, Waterbury, Conn, a corporation of Connecticut Application April 2, 1942, Serial No. 437,417
26 Claims.
means being composed of plural parts which open slightly and permit the wire to pass therebetween, then close onto and firmly grip the wire, and then, as a unit, move across the face of the cut-off die and sever the gripped portion of the wire with an absolutely square cut-off face, and then carry and transfer the cut-off portion, now a workpiece, to a push-out station; and to so arrange this cut-off mechanism with respect to other parts that it will return for a succeeding cut-off operation during the transfer of the workpiece to the fabricating die. Other objects of the invention will become apparent from the following description and accompanying drawings, disclosing for the purpose of illustration, a preferred embodiment of the invention.
To these ends my invention consists in the cutoff and transfer mechanisms, having certain details of construction and combinations of parts, as will be hereinafter described and more particularly pointed out in the claims.
In the drawings, wherein like numerals of ref erence indicate like parts in the several figures; 1
Figure 1 is a transverse sectional view of a conventional header or the like, with this improved mechanism associated therewith, the parts in section being taken generally upon line ll of Figure 5;
Figure 2 is a view of one end of the header;
Figures 3 and 4 are views of the die block, outter slides, cutters and parts of the transfer mechanism, the parts in section being taken generally upon a line extending through the wire line and push-out line;
Figure 4 is a perspective view of one form of feed stop finger;
Figure 5 is a fragmentary plan view of a portion of a conventional header or the like;
Figure 6 is a sectional view of a portion of the header frame, die block and associated parts, taken generally upon line 6-6 of Figure 1;
Figures 7 and 8 are perspective views of tw forms of cutter knives;
Figure 9 is a fragmentary perspective view of the cutter knives and. slides;
Figure 10 is a fragmentary sectional view of the gib, slide and associated parts, the parts in section beingtaken generally upon line III-l0 of Figure 1;
Figure 11 is a transverse sectional'view of the header or the like, the parts in section being taken generally upon line i l--l I of Figure 5, with the cutting mechanism omitted for clearing;
Figure 12 is a view of a portion of the header frame, feed cam and lever mechanism;
Figure 13 is a view of a portion of the transfer mechanism;
Figure 14 is another view thereof, the parts in section being taken generally upon line I l-l4 of Figure 13;
Figure 15 is a view of a portion of the transfer mechanism, the parts in section being taken generally upon line l5l5 of Figure 11; and
Figure 16 is a view of the workpiece gripping portion of the transfer mechanism.
Referring to the drawings, I0 indicates the frame of a header, upsetting machine or the like, having a die block l l, in which is a fabricatin die I2 or the like. This die lock may be held rigid in the frame by any one of many convenient means well known in the art. Slidably held in the face of the die block H, by a gib l5 or the like, are the two cutter slides l3 and l4, the former having a lug IT at its outer end and the latter a similar lug l8 at its outer end, which are in line with each other. Between these lugs; and passing through an opening in the gib I5, is a rod l9, one end of which bears against the lug l1, and the other end of which passes through the lug l8, with a nut 20 threaded on the outer end thereof. When the die block II is to be removed from the header, the nut 20 on the rod I9 is tightened. This compresses the spring 23 and relatively the tension against the lugs l1 and It on the slides l3 and I4, so that they may later be brought together free from contact with the V roll59 and the adjusting screw 52. .As so positioned, the entire die block unit may be removed the lug I1 and limits movement of the slide I3 in one direction. Both slides are reciprocated by positively actuated mechanism. Such mechanism for moving the slides to the left, when viewed in their relative positions, as shown in Figure 1, comprises in part a rock arm 25, carrying a cam roll 59, fixed on a rock shaft 26, journaled in the frame I0, a rock arm 21, also upon the shaft, to which the connection 28 is hinged, by a pin 29 or the like. J ournaled on the pin 30, fixed in the frame ID or other rigid part, i a rock arm 3|, to which the yoke 32 and cam roll 33 are journaled. The cam roll rides against the face of a cam 34 fixed upon the side shaft 35. Between the yokes 28 and 32 is a connection rod 35, threaded in the yoke 28 and passing through an'opening in the yoke 32, with lock nuts 31 on its inner end.
Between the collar 38 on the connection rod 35 and the yoke 32, is a spring 39. Fixed to the frame I is a bracket 40, within which aplunger M is movably mounted and partly surrounded by a spring 42, between the screw 43 andga shoulder on the plunger. One end of this plunger. engages a shoulder (Fig. 2) on the rock arm SI and exerts a tension thereon that holds the'cam roll 33 against the face of cam 34-. The connection rod 36 and associated parts provide means for adjustment of, the position of the rock .arm 25, by which the slides I3 and I4 are moved in one direction (toward the left in Figure 1). ,These slidesare moved in the opposite direction (to the right when Viewed in Figure 1) from a cam 44 on the side shaft 35, through a rock lever 45 fulcrumed on the pin 30. 45 is a cam roll 46, whichrrides against the face of the cam 44 and is held thereagainst, by a spring pin' 48 pivotally connected to the rock lever 45 and slidable through a nut 49; threaded in the frame In (Fig. 1) being surrounded by a spring 47.
Movably mounted in the frame I0 is a plunger 59 connected by a link I with the rock lever 45, and whereby areciprocating motion is imparted thereto from. the cam 44. An adjusting screw 52 is threaded in the inner end of the cut-off plunger 5|.and;held in its adjusted positions by a nut 53.) The outer end of this screw 52 abuts against the lug I8. Secured to the inner adjacent end of each of L the slides I3 and I4, by'screws or other convvenientmeans, is a cutter I6. Inthe inner end of: each of these cutters is a recess BI that is substantially the same shape in cross section as a portion of the workpiece. When the cam roll 46 is on the low portion of the cam 44, the slides I3. and I4 with the cutters I Bnthereon, are in a position wherein the. opening 51 between the innerends of the cutters and formed bythe recesses SI of the same shape in cross section as the workpiece, is opposite and in register .with the wire line, that is, the line of feed of'the'wire through the cut-off die 55. When the cam roll 46 is on the high portion of the .cam 44, the
slides I3 and I4 and. the cutters I6 thereon, are
in their right hand position (Fig. 1),'the. opening 51 then being in register with the push-out line 58. A push-out pin 54 at this station operates in a well known manner. Thecamtiming is'such that when the plunger 50 ismoving the-slides and cuttersfrom the wire line to the push-out line, the cam roll 59 will maintain its contact with'the lug I1. 'When the cutters are moved in the reverse direction? thessource of Upon. the rock lever like.
25 and the cut-off plunger moves rcarwardly without losing contact with the lug I8.
When the slides are in the position wherein the opening 5? is in register with the wire line, and also when in register with the push-out line, the cutters I6 are moved and held apart a limited distance by the spring 23, thus allowing a free passage of the wire and workpiece therebetween.
The screw 52 in the plunger 55 is adjusted so that the cutter I6 connected with the slide I4 stops just short of the push-out line.
During this action the rock arm 25 continues its movement for a slight over-travel, until thelug I! on slide I3 engages the stop screw 24 and the cutter I5 thereon stops just beyond the push-out line. The spring 23 now holds these cutters slightly separated, pushing the slide I3 away from. the slide I4, as determined by the stop pin 24, releasing their grip on the workpiece held therebetween.
The push-outpin 54, operating in a well known manner, projects the workpiece from between the cutters into the fingers of the transfermechanism. The slides'l3 and I4 are returned so that the opening 57 again-registers with'the wire line, through the action of the cam 34, arm; 25 and associated parts. During the first portion of this return movement the slide I3 is actuated independently until the cutter thereon engages the cutter on the'slide I4. Both slides and cutters now move as a unit until the opening 51 is approximately in register with the wire line. This is due to the fact that the rock arm 25 discontinues its pressure upon the slide I3, but the cut-off plunger 5|] continues its movement for aslight over-travel. The spring 23 now separates, the slides I4 and slide I3 and the cutters thereon a. limited distance sufficient to permit the wire to pass freely therebetween untilthe end thereof engages a feed stop or the A portion of one form of-feed stop 55 is shown in Figure 6, but anypreferred form may be used within this invention. Immediately the power is applied thereto through therockiarm end portion of the wire is-between the cutters, the plunger 59 advances the slide I4 and the cutter attached=thereto up to and in contact with the projecting portion of the wire. At the same time the cam 34 rocks the arm 25, advancing the slide I3. and its cutter until the latter contacts with the projecting portion of the wire. When so positioned,-the two cutters firmly and rigidly grip that portion of the wire projecting beyond the face of thecut-oif die 55. The slides now move the cutters and theworkpiece held firmly therebetween from the wire line to the push-out line and during such movement the cutters sever the projectingportion of the wire from the wire length. The spring 39 compensates for any inaccuracy in the timing between the two earns 34 and 44.
. In. Figures '7, 4, 8 and 3, two forms of cutters are illustrated, theone shown in .Figuresa and 3 beingdesigned for use in fabricating so-called longworkpieces, and that shown in Figures 7 and 4 being designed for use in fabricating socalled short workpieces. These cutters are preferably constructed with a body portion, through which are openings to receive the fastening screws and a head portion 60 of greater thickness thanthe body portion, in the end face of which is the recess 6! to receive the wire, and to retain and carry it-from-one station to the other. For a workpiece longer than the :thickness of the head portiontfl, the feed stop 55 is outside of the cutter, as in Figure 6. For a workpiece shorter than the thickness of the; head portion 60 a feed stop 62 is used, having a relatively narrow tip 64. For such short length workpieces each cutter I6 is provided with a slot 63 of the desired depth, and into which projects the tip 64 of the feed stop that is in the path of the wire as it is fed through the cut-off die 56 into the opening 51 between the cutters when in register with the wire line. The thickness of the head portion 60 of these cutters is such that they give great stability to the projecting portion of the wire therebetween as the same is cut off from the wire length. This is one favorable factor in insuring a rigid holding of the wire during the cut-off operation, an ,essentialin producing a square end workpiece. This relative thickness of the cutter head is possible in this invention because the workpiece is not presented to the fabricating die by the cut-off knives or cut-;
ters, as heretofore. In practice, it has been found that heretofore these cutters must be materially reduced in thickness to prevent interference with the advancing punch at the fabricating die.
Herein the heads 60 of the cutters are relatively,
thick regardless of the length of the workpiece and rigidly support the workpiece and hold it against distortion while being severed.
On the rock shaft 26 is a rock arm 65, to which is secured a finger block 66, carrying a finger On this finger arm is a latch 68 held arm fi'i. by a bolt 69 under the tension of a spring Hi. In the end of the arm 61 is a notch 1!, open at one side, and over which projects an end of the latch 68, thus forming a notch H for the recep tion of a workpiece. Thefinger block 66 is adjustable on the rock arm 65 and the finger arm 67 on the finger block 66, and whereby the notch ll may be moved into alignment with the center of the fabricating die I 2, and thus bring the work- On the side shaft is a cam hub 80, to which is secured the cam 8| by the screws 82, and a cam segment 83 adjustably securedthereto by the same screws 82.
Journaled on the pin 84, fixed in the frame H3, or other rigid part, is a rock arm 88, carrying a cam roll 85, which rides against the face of the cam 8| and cam segment 83, being held in such contact by a rod 89 connected by a pintle 99 with the rock arm 38 and slidable within a nut 86 in the bracket 81 secured to a fixed part and a spring surrounding the rod.
Between the rock arms 88 and 9| on the shaft 14, is an adjustable connection, comprising a rod 92, secured by a yoke 9! pivotally connected with the rock arm 9i and by a yoke 93 to the rock arm 88. Between the yoke 93 and a collar 94 on the rod 92 is a spring 95, which will yield when the lug I9 is in contact with the stop screw 18 when the apparatus is set for short workpieces. The timing of the transfer is such that the finger arm 6] is quickly withdrawn from itsposition in front of the fabricating die I2 and earlier or later to clear the advancing punch so that very short length blanks may be accommodated; For cut-a;
ting off workpieces that are longer than the thickness of the cutters, the notch H is carried above the push-out station. When in such a position it dwells while the workpiece between the cutters is carried over from the cut-off station in front of the push-out pin 54. The finger arm 61 now moves down and snaps onto the workpiece which rests in the notch H under slight pressure from the latch 68. After the blank has been pushed entirely out of the cutters and into the notch H, the pusher pin 54 is withdrawn quickly and the arm arm 65 swings to the left, as shown in Figure 11, causing the finger arm 61 to swing downwardly carrying the workpiece in the notch'll into register with the fabricating die l2, at which time the lug 19 contacts the stop screw 11 and is adjustable for position as thespr ing 98, surrounding the rod 89 will yield'for such adjustment.
The cam BI and cam segment 83 are utilized for transferring both short and long workpieces. When transferring a workpiece shorter in length than the thickness of the cutters, the finger arm 61, with the notch in its outer end, stops-at the push-out station, and then the spring 95 is compressed to allow the full stroke of the cam BI and cam segment 83.
When cutting off workpieces longer than the thickness of the cutters, the stop screw 18 is not utilized and the full stroke of the cam,8l and cam segment 83 is used as above described. The cam segment 83 is adjustable on the cam 81 through the screws 82 and slot' 96, to give an adjustment of timing to the rock arm 65, so that the finger arm 61 can be returned from the fabricating die l2 earlier or later as may be required.
In Figure 4 the feed stop 62 is positioned closer to the die block than is the feed stop shown in Figure 3. I
With the mechanism herein disclosed a workpiece is cut from a wire length witha severed face that is at a right angle to its length. Such right angle or square face is advantageous in future operations upon the workpiece. The end of the wire in the cut-off die also has a perfectly square face and becomes one end of the next succeeding workpiece cut therefrom, thus both ends of th workpiece are at right angles to the length of the workpiece and parallel with each other. In order to withstand the cut-off strain the parts upon which this duty comes mustbe relatively heavy and substantial to properly perform their functions. The workpiece when out off, however, is relatively light. Therefore, the mechanism that transfers the workpiece from the cutoil' mechanism to the fabricating dies is also relatively light. This differential in bulk, strength, etc., in favor of the transfer mechanism, is apparent in this invention. The cutters, plunger and associated parts are relatively heavy and strong in comparison with the finger arm '61, finger block 66 and rock arm 65, forming part of the transfer mechanism. In headers of this general character, heretofore made, the cut-off mechanism and the transfer mechanism are one and the same, and therefore, do not have a differential as to weight, strength, etc. Again, in such headers, the cut-off and transfer mechanism dwell a sufficient length of time in front of the fabricating dies to permit the workpiece to be removed therefrom and presented to the die before a simceeding feed of wire can take place. In the construction herein disclosed, however, immediately the transfer mechanism receives the workpiece the cut-off mechanismreturns to the wire line anism carries the workpiece intoline with the fabricating die. Thus thetiming is easier and an increased speed of operation and output is achieved. In this mechanism the transfer arm is positively actuated through a link connected with the rock arm at a point distant from the axis of rotation of the rock arm, thus inducing ease and simplicity of action as distinguished from the conventional type of transfer mechanism, wherein the rock arm is fixed on a rock shaft and actuated thereby.
With this improved mechanism, the header is operated at an increased speed with resulting increased output. While operating under this increased speed, if perchance a workpiece when ejected from the fabricating die does not drop by gravity suificiently fast to be out of the path of another punch, the transfer mechanism, carrying the new workpiece will engage it and assist in driving the workpiece downward. When the punches are horizontally shifted, the second punch at one side of the first punch is in a horizontal line and the workpiece only clears a single punch as it drops by gravity or is forced downwardly by the transfer mechanism. This differs in operation from the conventional type of header. where the two punches are in a vertical line and the workpiece ejected from the fabricating die must clear in its downward travel the second punch located below. Consequently, so far as clearing the fabricated workpiec is concerned, the header, by reason of this improved mechanism is virtually a single stroke machine, due to the second punch being at one side of the first punch and in substantially the same horizontal plane.
This invention may be embodied in forms other than that shown herein and be within the scope and spirit of the accompanying claims.
What is claimed is:
1. In a device of the character described; mechanism for cutting off a portion of a length of wire, rod or the like at one station, comprising in part companion cutters which receive and grip the wire therebetween during the cut-off operation and while so gripped cut off the gripped portion and carry it by a straight line movement-to another station; and means for separating the cutters at both stations, whereby the wire and-work pieces may move freely therebetween.
2. In a device of the character described; mechanism for cutting off a portion of a length of wire, rod or the like at one station, comprising in part companion cutters which receive *and grip the wire therebetween during the cut-off operation and while so gripped cut off the gripped portion and carry it by a straight line movement to another station; and resilient means that actuate the cutters when in register with the said stations and whereby the cutters are separated at both stations a sufiicient distance to permit the wire and workpieces to move freely therebetween.
3. In a' device of the character described; mechanism for cutting off a portion of a length of wire, rod or the like, at one station, comprising in part a die block, pluralslides mounted'thereon to move in a substantially straight line, a cutter upon each slide, between which the wire is receivedand rigidly held while said portion is beingcut off and thereafter carries it to another statin,-one slide having an over movement and one slide a short movement at each station, whereby the cross area of that portion of the cuttersthat receives the rod is greater than that of;the rod and whereby the 7 wire rod and workpiece may move freely therebetween.
4; In a device of the character described; mechanism for cutting off a portion of a length of wire rod or the like, comprising in part plural 1 slides; a cutter associated with each slide and bebetween which the wire is rigidly held during the cut-off operation; a member between said slides;
. and resilient means exerting a tension upon said member and whereby said slides are separated a limited distance as the wire passes between the cutters.
6. In a device of the character described; mechanism'for cutting off a portion of a length of wire, rod or the like, comprising in part plural slides, each. having a lug thereon; a cutter associated with each slide and between which the wire is rigidly held during the cut-off operation; a member passing through the lug on one slide and engaging the lug on the other slide; a spring between said member and one of said lugs, whereby'tension is-exerted on said member to separate said slides.
'7. In a device of the character described; mechanism for cutting off a portion of a length of wire, rod or the like, comprising in part plural slides mounted in a rigid part to move in a substantially straight line; a fixed element holding the slides within said rigid part, a member passing through said fixed element, engaging a shoulder on one slide and passing through a part on the other slide, and tension means to separate said slides.
8. In a device of the character and for the purpose described; a slide; a cutter having a body portion and a head portion of greater thickness'than the body portion with a blank holding recess in the end face of the head portion; and means for securing the cutter to the slide in engagement with the thinner portion of the cutter.
9. In a device of the character and for the purpose described; a slide; a cutter having a body portion, and a head portion of greater thickness than the body portion with a holding recess in the end face of the head portion, and a slot extending part way through the body and head portions to receive a stop member; and means for securing the cutter to the slide in engagement with the thinner portion of the cutter.
10. In a device of the character described; mechanism'for cutting off a portion of a length of wire, rod or the like, at one station, comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other.
11. In a device of the character describedmechanism for cutting off a portion of a length of wire, rod or the like at one station, comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween durlngthe cut-off operation and transfers it to a second station; separate cam actuated means of wire, rod or the like at one station, comprising in part, plural slides mounted to move in a substantially straight line, a cutter upon each slide, between which the wire is received and rigidly held while said portion is being cut off and thereafter carried to another station; and adjustable stop means for limiting the movement of the slides in one direction.
13. In a device of the character described;-
mechanism for cutting off a portion of a length of wire, rod or the like at one station, comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other, each of the cam actuated means yielding to permit movement of the slides in the direction opposite to that actuated thereby.
14. In a device of the character described; mechanism for cutting off a portion of a length of wire, rod or the like at one station, comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other, said cam means having a slight over movement to permit separation of the slides by independent means.
15. In a device of the character described; mechanism for cutting off a portion of a length of Wire, rod or the like at one station, comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-01f operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other,
one of said cam actuated means having a reciproeating member adjacent to its actuated slide and the other cam means having a rock member adjacent to its actuated slide.
16. In a device of the character described; mechanism for cutting off a portion of a length of wire, rod or the like at one station, compris ing in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; and separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other, one of said cam actuated means including as a part thereof a reciprocating member adjacent to its actuated slide and the other cam means including as a part thereof a rock member adjacent to its actuated slide; and an adjustable member between the reciprocating member and its actuated slide to vary the relative positions thereof.
17. In a device of the character described; mechanism for cutting off a portion of a length of wire, rod or the like at one station, comprising in part companion slides, a cutter On each slide which receives and holds the wire therebe tween during the cut-off operation and transfers it to a second. station; separate cam actuated means for moving the slides in both directions with the cutters in engagement with each other; and means for compensating forany inaccuracy in the timing of said separate cam actuated means.
18. In .a device of the character described; in combination with companion reciprocating slides that carry a workpiece from one station to another and move toward and away from each other in the same plane as the slides reciprocate; of transfer means for carrying the workpiece from the last mentioned station to astation in a different plane.
19. In a device of the character described; in combination with companion reciprocating slides that carry a-workpiece from one station to another and move toward and away from each other.
in the same plane as the slides reciprocate; of transfer means for carrying the workpiece from the last mentioned station to a station in a different plane through the arc of a circle.
20. In a device of the character described; mechanism for cutting off a portion of a length of wire, rod orhte like at one station, comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; transfer means for carrying the workpiece from the last mentioned station to a station in a diiferent plane through the arc of a circle; and means for actuating said slide and transfer mechanism, whereby the transfer mechanism will carry the workpiece to the last men tioned station while the slides are returning for the next succeeding workpiece.
21. In a device of the character described; in combination with slides that carry a workpiece from a cut-off station to a pushout station; of transfer means for carrying the workpiece through the arc of a circle from the pushout station to a delivery station that is positioned in a plane different than the delivery station and in a plane nearer the cut-off station than the delivery station; means for actuating said slides and transfer mechanism, whereby the transfer mechanism will carry the workpiece to the delivery station while the slides are returning to the cut-off station for the next succeeding workpiece; and means for controlling the transfer mechanism, whereby it will be held out of alignment with the workpiece while the workpiece is being partially ejected from the slides.
22. In a device of the character described; mechanism for cutting off a portion of a length of wire, rod or the like at one station, comprising in part companion slides, a cutter on each slide which receives and holds the wire therebetween during the cut-off operation and transfers it to a second station; transfer means for carrying the workpiece from the last mentioned station to a station in a different plane; means for actuating the slides and transfer mechanism, whereby the transfer mechanism will carry the workpiece to the last mentioned station while the slides are returning for the next succeeding workpiece; means for controlling the transfer mechanism, whereby it will be held out of alignment with the workpiece while the workpiece is being partially ejected from the slides and then moved into engagement with said workpiece.
23. In a device of the character described; mechanism for cutting off a portion of a length of wire, rod or the like at one station, comprising in part .companion slides,.a cutter oneachv slide which receives and holds .thelwiretherebe- V tween during the cut-off operation and transfers: it to a second station; andaseparate cam. actuated means for .moving' the, slides in both directions with the cuters in engagement: with. each other,
one of said cam actuated means having a re-..
ciprocating member adjacent to its actuatedslide and the other cam means having roclcmember 1 adjacent to its actuated slide; in combination with transfer mechanism whichcarries the works. 1. piece from thelastmentioned station to a. stew. tion. in a different plane, the transfer. mechanism being of lighterstructure than that of the:
reciprocating member actuating slide-A.
24. In combination with-a headerchavinga die block with a cut-off station; a pushout sta-. tion in substantially the same plane. as thelcutoiT station, and a fabricatingdie'in another plane that is also in a plane. nearer ;theicut-.ofi
stationthan .the pushout station; means for'carrying a workpieceon a linerwith thepush-out:
station to a point in register. withthe fabricating die,ucomprising a movably mounted fingers carrying. member; and means for moving the finger from the push-outstation to the fabricating dieand from thefabricating dieto thezpush+ out station through. an element; connected with the carrying member and having a reciprocating.
motion.
25. In a device of the character. described;
a die block; mechanismiorcutting 01f alength of wire-rod or the'like at one station on the die block, comprising in part companion slides, a cutter in each slide which receives and. holds the wire therebetween during the cut-off operation andtransfers .it to a second station on thedie b1ock;:and. separate cam actuated means outside of the;die.block for moving the slides in both directionswith-the cutters in engagement witheach other. 1
26..In.a device of the character. described;
of thendieblock for moving the slides in both di rections.;with. the..cutters in engagement with each otheryand means for holding. said com-.
panioir slides-in relation to eachother, whereby thediegblock andslides-maybe removed without change. :of position. of the said. cam actuated means.
RICHARD LESTER WILCOX.
US437417A 1942-04-02 1942-04-02 Cutoff and transfer mechanism Expired - Lifetime US2318825A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499341A (en) * 1944-08-03 1950-02-28 Waterbury Farrel Foundry & Mac Movable work stop for solid die headers
US2537386A (en) * 1948-06-12 1951-01-09 Western Electric Co Feeding, cutting, and transfer mechanism
US2542864A (en) * 1946-04-19 1951-02-20 Nat Machinery Co Machine for making nuts
US2747205A (en) * 1951-11-12 1956-05-29 Fray Victor Hill Heading machines for bolts, screws, rivets, and the like
US2768394A (en) * 1953-05-20 1956-10-30 Chandler Products Corp Disengageable drive means in a heading machine
DE1144085B (en) * 1957-12-18 1963-02-21 Textron Ind Inc Cross conveyor device on step presses for bolts

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499341A (en) * 1944-08-03 1950-02-28 Waterbury Farrel Foundry & Mac Movable work stop for solid die headers
US2542864A (en) * 1946-04-19 1951-02-20 Nat Machinery Co Machine for making nuts
US2537386A (en) * 1948-06-12 1951-01-09 Western Electric Co Feeding, cutting, and transfer mechanism
US2747205A (en) * 1951-11-12 1956-05-29 Fray Victor Hill Heading machines for bolts, screws, rivets, and the like
US2768394A (en) * 1953-05-20 1956-10-30 Chandler Products Corp Disengageable drive means in a heading machine
DE1144085B (en) * 1957-12-18 1963-02-21 Textron Ind Inc Cross conveyor device on step presses for bolts

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