US3927549A - Ejecting device for use in metal forging machine - Google Patents

Ejecting device for use in metal forging machine Download PDF

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Publication number
US3927549A
US3927549A US517745A US51774574A US3927549A US 3927549 A US3927549 A US 3927549A US 517745 A US517745 A US 517745A US 51774574 A US51774574 A US 51774574A US 3927549 A US3927549 A US 3927549A
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US
United States
Prior art keywords
rocking
ejector pin
slide
pair
rocking arm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US517745A
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English (en)
Inventor
Norbert Dycke
Hiroshi Sakai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Application granted granted Critical
Publication of US3927549A publication Critical patent/US3927549A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/14—Ejecting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/32—Discharging presses

Definitions

  • An ejecting device for use in a metal forging machine which has an ejector pin and a rocking arm exerting an ejecting motion on the ejector pin by its rocking motion.
  • the rocking motion of the rocking arm is caused by the action of a pair of rotary cams rotated by receiving rotation of a crank shaft of the machine.
  • the action of the pair of cams is transmitted to the rocking arm through -fil'St and second rocking mem- A bers connected with each other through a link, an up and down moving element and a plurality of guide rol- Iers.
  • This invention relates to an ejecting device for use in a metal forging machine, and more particularly to an improvement of an ejecting device for use in a horizontal type of multi-stage metal forging machine, for exampie, for automatically manufacturing bolts from a lengthy metal rod.
  • a conventional ejecting device for use in a metal forging machin has such a construction that a rocking arm rockably mounted on a slide, which is reciprocated in response to rotation of a crank shaft, comes into contact with the periphery of a translation cam, which is fixed adjustably to the distal end of the machine frame, through a guide roller rotatably mounted on the upper end of the rocking arm, on the other hand, the rocking arm also comes into contact with an ejector pin slidably inserted into a punch, which is fixedly secured to the distal end of the slide, through a guide roller rotatably mounted on the lower end of the rocking arm, wherein since the upper guide roller of the rocking arm rollingly moves along the periphery of the translation cam when the slide is reciprocated in response to the rotation of the cranck shaft, the rocking arm is rocked forwards and backwards in the reciprocational direction of the slide, thus the ejector pin is ejected by the lower
  • the amount of stroke of the slide becomes small at the time when the crank shaft is positioned about the lower dead point in its rotation, the amount of stroke of the ejector pin becomes also small, thereby taking a long time to knock out a product by the ejector pin.
  • the present invention contemplates to eliminate the above described disadvantages of the conventional ejecting device.
  • an ejecting device for use in a metal forging machine including therein an ejector pin slidably inserted into the distal end of a slide reciprocated in response to rotation of a crank shaft provided within the machine and a L-shaped rocking arm having upper and lower guide rollers at each end thereof and rockably mounted on the slide through a pivotal shaft to exert an ejecting motion on the ejector pin, which comprises a pair of rotary cams rotatably mounted on a cam shaft, which is rotatably supported by a frame of the device and is rotated by receiving rotation of the crank shaft, a pair of first and second triangular rocking members, each being rockably supported by the device frame through a pivotal shaft at each apex portion thereof, which are connected with each other through a link at their respective second apex portions and are arranged in such a manner that the respective four pivotal shafts for supporting the rocking members and the link are positioned at respective four corner edges of
  • FIG. 1 is a schematic partially cross sectional side view of a conventional ejecting device for use in a metal forging machime
  • FIG. 2 is a schematic partially cross sectional side view of one embodiment of the ejecting device according to the present invention
  • FIG. 3 is a schematic partially cross sectional plane view showing a drive mechanism of a cam shaft of the device of the present invention
  • FIG. 4 is a fragmental partially cross sectional front view showing a main part of the device shown in FIG. '2, and
  • FIG. Si is a fragmental plane view showing a main part of the device shown in FIG. 4.
  • a L-shaped rocking arm d provided with upper and lower guide rollers b and c at their respective upper and lower ends is rockably mounted on a slide a through a pivotal shaft e.
  • the upper roller b comes into contact with a cam face h of a translation cam g adjustabiy secured to the machine frame f, while 3 the lower roller c comes into contact with the proximal end of an ejector pin j slidably inserted into the distal end of the slide a and a punch 1 attached to the distal end face of the slide.
  • FIGS. 2 to 5 one embodiment of the ejecting device of the present invention is described as follows:
  • a slide 1 of a metal forging machine is connected with an eccentric part of a crank shaft 3 through a connecting rod 2 so that the slide 1 is reciprocated in response to rotation of the crank shaft 3.
  • the slide 1 is provided through an attachment 4 with a punch 5 at the distal end thereof and a L-shaped rocking arm 6 which is mounted thereon through a pivotal shaft 7 so as to rock forwards and backwards in a reciprocating direction of the slide 1 about the shaft 7.
  • the rocking arm 6 is provided at the lower end thereof with a lower guide roller 9 which is rotatably mounted on a shaft 10 supported by the rocking arm 6, while at the upper end thereof with an upper guide roller 1 l which is rotatably mounted on a shaft 12 supported by the rocking arm 6 also.
  • Reference numeral 15 represents a cam shaft rotatably supported by a frame 160 of the device. 0n the cam shaft 15, a pair of first and second rotary earns 17 and 18, which closely adhere to each other, are so mounted as to rotate together with the cam shaft 15 and to be adjustable on the position thereof with respect to the cam shaft 15.
  • the first and second rotary earns 17 and 18 come into contact with a first triangular rocking member 20 through a guide roller 21 which is rotatably mounted on a shaft 21a supported by an integral bracket 20a extending from one apex portion of the first triangular rocking member 20.
  • the first rocking member 20 is rockably mounted on the device frame 16a through a pivotal shaft 19 supported by the frame 160 and is connected by the interposition of a link 22 with a second triangular rocking member 24 which has the same shape as that of the first member 20 and is rockably mounted on the frame 160 through a pivotal shaft 23 supported by the frame 16a.
  • the link 22 is connected between the first and second rocking members 20 and 24 through respective pivotal shafts 25 and 26 supported by the first and second rocking members, respectively, and the pivotal shafts 25 and 26 are disposed at respective upper apex portions of the first and second rocking members 20 and 24, so that the first and second rocking members 20 and 24 carry out the same rocking motion simultaneously with each other as a pair in which the respective four pivotal shafts 19, 23, 25 and 26 are positioned at respective four corner edges of a parallelogram.
  • An U-shaped up and down moving element 27 is suspended between the first and second rocking members 20 and 24 at both upper end portions thereof through pivotal shafts 28 and 29, which are respectively supported by the first and second rocking members at their respective front apex portions, and come into contact with the upper guide roller 11 of the rocking arm 6 at the underside flat surface 270 thereof.
  • tha cam shaft 15 is connected with a transmission shaft 32 through conical gears 30 and 31 screwed on the cam shaft 15 and the transmission shaft 32, respectively.
  • the transmission shaft 32 is connected with another transmission shaft 34 through an universal joint 33.
  • the transmission shaft 34 is connected with the crank shaft 3 through conical gears 35 and 36 screwed on the transmission shaft 35 and the crank shaft 3, respectively.
  • the first and second cams l7 and 18 are of plates having circular parts 17a and 18a and flat parts 17b and 18b at their respective outer peripheries.
  • the ejection timing of the ejector pin 8 is preferably adjusted with respect to the rotation angle of the crank shaft 3 by varying the correlative position between the pair of first and second rotary cams 17 and 18 and the cam shaft 15 by rotating at a certain angle the pair of cams 17 and 18 about the cam shaft 15 independently of the shaft 15.
  • An ejecting device for use in a metal forging machine including therein an ejector pin slidably inserted into the distal end of a slide of the machine, said slide being reciprocated in response to rotation of a crank shaft provided within the machine, and a L-shaped rocking arm having upper and lower guide rollers at each end thereof and rockably mounted on the slide through a pivotal shaft so as to exert an ejecting motion on said ejector pin, which comprises a pair of rotary cams rotatably mounted on a cam shaft, which is rotatably supported by a frame of the device and is rotated by receiving rotation of said crank shaft, a pair of first and second triangular rocking members, each being rockably supported by said frame through a pivotal shaft at each first apex portion thereof, which are connected with each other through a link at their respective second apex portions and are arranged in such a manner that the respective four pivotal shafts for supporting said rocking members and said link are posithird apex portions and coming

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
US517745A 1973-10-24 1974-10-24 Ejecting device for use in metal forging machine Expired - Lifetime US3927549A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48118895A JPS5220188B2 (de) 1973-10-24 1973-10-24

Publications (1)

Publication Number Publication Date
US3927549A true US3927549A (en) 1975-12-23

Family

ID=14747803

Family Applications (1)

Application Number Title Priority Date Filing Date
US517745A Expired - Lifetime US3927549A (en) 1973-10-24 1974-10-24 Ejecting device for use in metal forging machine

Country Status (4)

Country Link
US (1) US3927549A (de)
JP (1) JPS5220188B2 (de)
BR (1) BR7408890D0 (de)
DE (1) DE2450631C3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257253A (en) * 1977-12-24 1981-03-24 Hatebur Umformmaschinen Ag Stamping apparatus with improved ejection mechanism
US4735080A (en) * 1986-01-22 1988-04-05 Eumuco Aktiengesellschaft Fur Maschinenbau Forming machine with ram-side ejector mechanism
CN100408224C (zh) * 2005-07-13 2008-08-06 金谙工业股份有限公司 锻造部品成型机的前通出机构
CN104438417A (zh) * 2014-12-07 2015-03-25 绥阳县耐环铝业有限公司 简易铝件顶出机构

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5532825U (de) * 1978-08-21 1980-03-03
DE3437282A1 (de) * 1984-10-11 1986-04-17 Th. Kieserling & Albrecht Gmbh & Co, 5650 Solingen Ausstossermechanismus fuer exzenterpressen
DE3904278A1 (de) * 1989-02-14 1990-08-16 Schuler Gmbh L Antrieb fuer einen in einem stoessel einer mechanischen umformpresse verschieblich gelagerten, patrizenseitigen auswerfer
DE4215451A1 (de) * 1992-05-11 1993-11-18 Schuler Gmbh L Antrieb für einen patrizenseitigen Auswerfer in einer mechanischen Umformpresse
DE10208720B4 (de) 2002-02-28 2005-11-03 Wafios Ag Stempelseitige Auswerfvorrichtung für Werkstücke bei Ein- oder Mehrstufenpressen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238761A (en) * 1963-03-07 1966-03-08 Textron Inc Machine for forming metal articles
US3364721A (en) * 1964-04-10 1968-01-23 F B Hatebur Arrangement for controlling the movement of an auxiliary element on a crank-operateddevice

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238761A (en) * 1963-03-07 1966-03-08 Textron Inc Machine for forming metal articles
US3364721A (en) * 1964-04-10 1968-01-23 F B Hatebur Arrangement for controlling the movement of an auxiliary element on a crank-operateddevice

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257253A (en) * 1977-12-24 1981-03-24 Hatebur Umformmaschinen Ag Stamping apparatus with improved ejection mechanism
US4735080A (en) * 1986-01-22 1988-04-05 Eumuco Aktiengesellschaft Fur Maschinenbau Forming machine with ram-side ejector mechanism
CN100408224C (zh) * 2005-07-13 2008-08-06 金谙工业股份有限公司 锻造部品成型机的前通出机构
CN104438417A (zh) * 2014-12-07 2015-03-25 绥阳县耐环铝业有限公司 简易铝件顶出机构

Also Published As

Publication number Publication date
JPS5068950A (de) 1975-06-09
BR7408890D0 (pt) 1975-09-23
JPS5220188B2 (de) 1977-06-01
DE2450631C3 (de) 1981-01-29
DE2450631B2 (de) 1980-05-22
DE2450631A1 (de) 1975-05-07

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