US3755839A - Automatic quick press for manufacturing small-diameter short-shank bolts - Google Patents

Automatic quick press for manufacturing small-diameter short-shank bolts Download PDF

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Publication number
US3755839A
US3755839A US00193324A US3755839DA US3755839A US 3755839 A US3755839 A US 3755839A US 00193324 A US00193324 A US 00193324A US 3755839D A US3755839D A US 3755839DA US 3755839 A US3755839 A US 3755839A
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United States
Prior art keywords
head
die
tool
ram
tools
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Expired - Lifetime
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US00193324A
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English (en)
Inventor
I Gelanyi
B Kacsmarek
E Enody
S Kovacs
B Karoly
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CSAVARIPAU VALLALAT
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CSAVARIPAU VALLALAT
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/44—Making machine elements bolts, studs, or the like
    • B21K1/46—Making machine elements bolts, studs, or the like with heads
    • B21K1/466—Heading machines with an oscillating die block
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/06—Swaging presses; Upsetting presses

Definitions

  • ABSTRACT A press for the production of short-shank smalldiameter bolts comprises an angularly oscillatable diehead having two die members disposed along an are centered upon the axis of oscillation of the head and juxtaposed with a ram carrying three forming tools ar- 5 Claims, 7 Drawing Figures l. a ll PATENTEDSEP 4 1111 317551839 22 1 19 1s 21 11 3 B 40 47 ⁇ 16 1 33 42 4 E W 11 u 15 13 I 7 N 16 31 B 27 38 1 A 32 35 5 I I I 1,
  • bolts and the like hereafter denominated generally as bolts.
  • the moving tools of such convential machines perform motion in two directions i.e. a reciprocating motion in the pressing direction, and another motion generally perpendicular to the first, with interchanging of the positions of the tools, for double working of the piece.
  • This mode of manufacture has the drawback that it is able to produce a finished bolt only with every second revolution of the main shaft so that the productivity of such machines is low.
  • the moving tools perform with the ram carrying them a reciprocating motion only, while transfer of the work piece uses a motion perpendicular to the travel of the ram, via a transport device.
  • This transport device is of large mass and performs a periodic motion. During one transport operation two starts and stops are effected, i.e. two accelerating and braking forces arise,
  • transverse transport presses Although suitable in theory, have not been employed to any significant extent because they cannot be economically used on fast running machines,. For this reason, in the production of small diameter (below 6 mm), but long shank (over 30 mm) bolts, instead of transverse transport machines, dump transport machines are more economical.
  • a dump transport press with two dies and two moving tools produces, with every revolution of. the main shaft, a finished bolt.
  • the second die of the revolving head returns empty into the first position, where upsetting of a new piece starts, and the process repeats.
  • the circumferential speed v of the, rotating die head increases proportionally, and as the dimension d" of these dies is relatively large, the path d rr/2 is long and the resulting energy of motion causes strong dynamic vibrations and high wear in the control equipment.
  • FIG. 1 shows in diagrammatic form, the kinematic scheme of one embodiment of an automatic quick press according to the invention
  • FIGS. 20 and 2b illustrate in perspective views partly broken away two phases of the oscillating head, of the locking device and of their control gear
  • FIG. 6 illustrates, in a view similar to FIG.3, the actuating rods of the kicker rods with different gearing ratio.
  • FIG. 1 in the machine body receives a movable ram 4 actuated by a crankshaft 2 via a connecting rod 3.
  • a movable ram 4 actuated by a crankshaft 2 via a connecting rod 3.
  • the preforming tool 5 On the front plate or face of ram 4 in a vertical plane at the highest point of a pitch circle, is disposed the preforming tool 5; on the same circle, 30 to the right and to the left from the preforming tool 5, heading dies 6/a and 6/b are provided.
  • the head 7 is formed with 8/41 and 8/1) angularly offset by 30 from each other along the same pitch circle as the tools on ram 4.
  • Raw wire 18 is fed into the cutting sleeve 13 on the machine body I; The raw wire is pulled through the cutting sleeve and over circular forming cutter (disc cutter) 16 to stop 17.
  • the circular forming cutter cuts a piece of wire from the raw wire 18 and transfers it to gripper 20 in front of the transfer mandrel 19.
  • Transfer mandrel 19 pushes the wire piece from the circular forming cutter 16, into the transfer gripper 20, which passes the wire piece in front of the die in this case member 8/a in position II of the oscillating head 7, relative to the upper body.
  • kicker (ejector) rod 21 pushes in position III of the oscillating head 7, the finished product from die 8/a (see also FIG. 3), whereupon head 7 swings back by 30, so that die 8/0 arrives again in its upper position II, while at the same time die 8/b is shifted into its left side position I.
  • Transfer gripper introduces a wire piece cut from the raw wire 18 in front of die 81a.
  • the heading tool 6/b of ram 4 approaching its first dead center position finishes the bolt already preformed in die 81b, while contemporaneously preforming tool 5 processes the new wire piece being in die 8/a.
  • tool S carries out preforrning in position ll of the oscillating head 7, once in die 8/a again in die 8/b, while contemporaneously during this revolution heading tool 6/a cooperates with die 8/0 being in position III, while during the next revolution heading tool 6/12 cooperating with die b/b in position I to produce respective bolt.
  • kicker rods 21 and 22 operate alternately on every second revolution.
  • the design and the kinematic chain of the equipment according to the invention can be followed in the way described here.
  • Control of drawing of raw wire 18 is effected conventionally by a pair of camwheels via rod 15 and a pair of drawing rolls 12.
  • Transfer gripper 20 located on rod 28 is actuated by control disc 29 located on the cutting auxiliary spindle 25, and by the cooperating compression spring 30, between the transfer mandrel 19 and position II of the oscillating head 7.
  • the oscillating head 7 equipped with two dies, according to the invention is supported in bearings in the machine body 1, and is so designed that dies 8/a and dlb are located on a circle of the oscillating head 7 and can be induced in the three positions I, II and III, being shifted between them by a determined angle, preferably by 30; the indexing means isconstructed and arranged so that one of the positions is the midposition (II) suitable for preforming, while the others are extreme positions (I or III), which are finishing positions and are equipped therefore by controlled kicker rods.
  • indexing slots 31 and 32 Opposite to the locations of the dies, on a circle in diametric symmetry are two indexing slots 31 and 32, cooperating with indexing or pins wedges 33 and 34 respectively, ensuring the fixed positions of the oscillating head 7.
  • Movement of the oscillating head 7 is derived from 6 Locking and releasing of the oscillating head 7 between movements is ensured by registry at suitable intervals of time of the fixing slots 31 and 32 of the oscillating head 7 with the fixing wedges 33, 34 driven by the control discs and 41 located on the auxiliary spindle 11, and by the intermediate rolls 36 and 37,
  • On this auxiliary shaft are located in the plane of positions I and III of the oscillating head 7 two pairs of cam discs 50, 51, controlling by rods 52, 53 the motion of the ejector mandrels 21 and 22.
  • auxiliary shaft 49 carries the cam disc 54 operating the transfer mandrel 9 for feed of the wire piece.
  • FIGS. 4-6 An alternative construction of the machine according to the invention equipped with two pairs of dies, i.e. for manufacturing simultaneously two products, is shown in FIGS. 4-6 The operation of this device is similar to that previously described, with the identically functioning parts being followed by x.
  • a press for the production of short-shank smalldiameter bolts comprising; 7
  • a forming head rotatable about an axis and provided with two angularly spaced die members disposed along an arc; press ram axially aligned with said head and provided with three forming tools arrayed along an arc corresponding to the arc of said die members and with an angular spacing between said tools equal to the spacing between said die members, said tools including a central tool for effecting a first shaping operation upon a workpiece received in a registering die member, and first and second tools for effecting a subsequent forming operation upon a workpiece received in a registering die member; means for axially displacing said ram toward and away from said head for forming of workpieces in said die members by the tools registering therewith on each forward stroke of the ram; indexing means for angularly oscillating said head in the cadence of operation of said ram and for temporarily locking said head in a first extreme angular position wherein said central tool is aligned with a first of said die members and said first tool is alligned
  • gripper means engageable with workpieces in succession for introducing them into said die members upon positioning of said die members substantially in alignment with said central tool; and respective ejectors cooperating with said die members when the latter are offset from alignment with said central tool for ejecting shaped workpieces from said head; and drive means for said ejectors, said gripper means,
  • said drive means includes a crankshaft; a connecting rod connected to said crankshaft and to said ram for displacing drum, said indexing means including wedges receivable in said notches, said wedges being provided with cam followers connected to said transmission means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
US00193324A 1970-11-11 1971-10-28 Automatic quick press for manufacturing small-diameter short-shank bolts Expired - Lifetime US3755839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUCA296A HU162369B (is") 1970-11-11 1970-11-11

Publications (1)

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US3755839A true US3755839A (en) 1973-09-04

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US00193324A Expired - Lifetime US3755839A (en) 1970-11-11 1971-10-28 Automatic quick press for manufacturing small-diameter short-shank bolts

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US (1) US3755839A (is")
DE (1) DE2154912C3 (is")
FR (1) FR2113882B1 (is")
GB (1) GB1354955A (is")
HU (1) HU162369B (is")
IT (1) IT942792B (is")
NL (1) NL7115518A (is")

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945072A (en) * 1974-07-04 1976-03-23 Ateliers J. Hanrez S.A. Apparatus for the control of die heads of presses with movable dies
US3965716A (en) * 1974-10-15 1976-06-29 Toyota Jidosha Kogyo Kabushiki Kaisha Device for swage-forging shafts
US4170123A (en) * 1978-02-03 1979-10-09 The National Machinery Company Convertible multiple blow two die cold header
EP0011293A1 (de) * 1978-11-17 1980-05-28 Sebastian Messerschmidt Spezialmaschinenfabrik Vorrichtung zum Abtrennen eines Rohlings von einem Werkstoffstrang und Zuführen zur Pressform einer Doppelpresse
US4364256A (en) * 1980-12-22 1982-12-21 Eufemia Garlaschi Latching device for the punch-carrier plate of a press for moulding screws, rivets and like articles
US4397172A (en) * 1980-12-19 1983-08-09 Eufemia Garlaschi Two-die, four-punch press for the production of screws, bolts, rivets and like articles
CN111570715A (zh) * 2020-05-25 2020-08-25 绍兴集知汇信息科技有限公司 一种螺栓智能成型加工系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919345C2 (de) * 1979-05-14 1987-01-02 Gebr. Hilgeland GmbH & Co, 5600 Wuppertal Antrieb für den intermittierend drehbaren, in vorbestimmten Stellungen verriegelbaren Matrizenhalter einer Bolzenpresse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1932396A (en) * 1930-12-04 1933-10-31 Nat Machinery Co Rotatable transfer for metalworking machines
US2303005A (en) * 1941-01-04 1942-11-24 Albert J Deniston Jr Nail heading machine
US2664579A (en) * 1948-10-08 1954-01-05 Joseph Behr & Sons Inc Cold header
US2768394A (en) * 1953-05-20 1956-10-30 Chandler Products Corp Disengageable drive means in a heading machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1932396A (en) * 1930-12-04 1933-10-31 Nat Machinery Co Rotatable transfer for metalworking machines
US2303005A (en) * 1941-01-04 1942-11-24 Albert J Deniston Jr Nail heading machine
US2664579A (en) * 1948-10-08 1954-01-05 Joseph Behr & Sons Inc Cold header
US2768394A (en) * 1953-05-20 1956-10-30 Chandler Products Corp Disengageable drive means in a heading machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945072A (en) * 1974-07-04 1976-03-23 Ateliers J. Hanrez S.A. Apparatus for the control of die heads of presses with movable dies
US3965716A (en) * 1974-10-15 1976-06-29 Toyota Jidosha Kogyo Kabushiki Kaisha Device for swage-forging shafts
US4170123A (en) * 1978-02-03 1979-10-09 The National Machinery Company Convertible multiple blow two die cold header
EP0011293A1 (de) * 1978-11-17 1980-05-28 Sebastian Messerschmidt Spezialmaschinenfabrik Vorrichtung zum Abtrennen eines Rohlings von einem Werkstoffstrang und Zuführen zur Pressform einer Doppelpresse
US4397172A (en) * 1980-12-19 1983-08-09 Eufemia Garlaschi Two-die, four-punch press for the production of screws, bolts, rivets and like articles
US4364256A (en) * 1980-12-22 1982-12-21 Eufemia Garlaschi Latching device for the punch-carrier plate of a press for moulding screws, rivets and like articles
CN111570715A (zh) * 2020-05-25 2020-08-25 绍兴集知汇信息科技有限公司 一种螺栓智能成型加工系统

Also Published As

Publication number Publication date
HU162369B (is") 1973-02-28
DE2154912B2 (de) 1974-02-14
DE2154912C3 (de) 1974-11-07
DE2154912A1 (de) 1972-06-29
IT942792B (it) 1973-04-02
FR2113882A1 (is") 1972-06-30
NL7115518A (is") 1972-05-15
GB1354955A (en) 1974-06-05
FR2113882B1 (is") 1976-06-04

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