JPS55165248A - Knockout method of closed forged product - Google Patents

Knockout method of closed forged product

Info

Publication number
JPS55165248A
JPS55165248A JP7196979A JP7196979A JPS55165248A JP S55165248 A JPS55165248 A JP S55165248A JP 7196979 A JP7196979 A JP 7196979A JP 7196979 A JP7196979 A JP 7196979A JP S55165248 A JPS55165248 A JP S55165248A
Authority
JP
Japan
Prior art keywords
movable parts
die cavity
die
dies
punches
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.)
Pending
Application number
JP7196979A
Other languages
Japanese (ja)
Inventor
Michio Bessho
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.)
Kawasaki Hydromechanics Corp
Original Assignee
Kawasaki Hydromechanics Corp
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 Kawasaki Hydromechanics Corp filed Critical Kawasaki Hydromechanics Corp
Priority to JP7196979A priority Critical patent/JPS55165248A/en
Publication of JPS55165248A publication Critical patent/JPS55165248A/en
Pending legal-status Critical Current

Links

Landscapes

  • Forging (AREA)

Abstract

PURPOSE: To move the movable parts after opening of upper and lower dies and make the knockout of the product from the lower die easy by letting the portions adjoining the through-hole for pounch be the movable parts in the die cavity part of the closed forging dies.
CONSTITUTION: Outer presses 9, 9 cause an upper die 2 to descend and make close contact with a lower die 3, thereby closing the die cavity. Further, punches 5, 5..., 5', 5'... enter the inside of the die cavity to forge the rough material. At this time, the top surface of the through parts 4a of the movable parts 4 adjoining the through- holes of the punches 5, 5 function as the partial faces constituting the die cavity. Next, if the oil pressure of oil paths 13, 14, 15 are cut off, the oil pressure of an accumulator 16 acts upon the presses 9, 10, 11 to pull back the respective presses, causing the upper and lower dies 2, 3 to space. Thence, the oil pressure from the oil path 22 separate from the moving means of the upper dies 2, 3 and punches 5, 5, 5', 5' causes cylinders 21, 21 to expell the plunger 4b, thereby moving the product upwards together with the movable parts 4.
COPYRIGHT: (C)1980,JPO&Japio
JP7196979A 1979-06-07 1979-06-07 Knockout method of closed forged product Pending JPS55165248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7196979A JPS55165248A (en) 1979-06-07 1979-06-07 Knockout method of closed forged product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7196979A JPS55165248A (en) 1979-06-07 1979-06-07 Knockout method of closed forged product

Publications (1)

Publication Number Publication Date
JPS55165248A true JPS55165248A (en) 1980-12-23

Family

ID=13475801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7196979A Pending JPS55165248A (en) 1979-06-07 1979-06-07 Knockout method of closed forged product

Country Status (1)

Country Link
JP (1) JPS55165248A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49119849A (en) * 1973-03-06 1974-11-15

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49119849A (en) * 1973-03-06 1974-11-15

Similar Documents

Publication Publication Date Title
DE69328262D1 (en) UNDERCUT MULTI-PIECE PRESS FORM
DE2637231C3 (en) Device for pressing ceramic powder into pot-like shaped bodies
EP1671723A3 (en) Split die and method for production of compacted powder metal parts
JPH0275433A (en) Double acting die set for blocked forging
GB1121599A (en) Indirect extrusion method for the manufacture of metal tubes or similar hollow bodies, and extrusion press for carrying out the method
ES8303949A1 (en) Hollow article internal pressure forming apparatus and method
JPS5588945A (en) Double-acting metal die
JPS55165248A (en) Knockout method of closed forged product
JPS5536044A (en) Closed forging press
JPS5659540A (en) Joining device of plate material
JPS57168742A (en) Forging press
JPS55161541A (en) Closed rough forging method of crankshaft
JPS56128636A (en) Closed forging method for connecting rod
JPS5568148A (en) Closed forging method of crankshaft
JPS56134037A (en) Closed forging method, forming die device, and closed forging press for annular body
GB1345236A (en) Forging press
JPS56136245A (en) Formation of frame pipe for bicycle
AU2001252818A1 (en) Method and impact machine for forming a body
JPS5664820A (en) Secondary processing apparatus of molded plastic product
JPS57103800A (en) Production of powder molding having body part of different diameter
JPS5530323A (en) Hydromechanical press
JPS56128637A (en) Closed forging method for connecting rod
SU897398A1 (en) Apparatus for compasting articles from powder
JPS55156631A (en) Forming method of axis-symmetrical parts
JPS55112146A (en) Die forging device