JPS5787919A - Hole machining method of frp leaf spring - Google Patents

Hole machining method of frp leaf spring

Info

Publication number
JPS5787919A
JPS5787919A JP16566980A JP16566980A JPS5787919A JP S5787919 A JPS5787919 A JP S5787919A JP 16566980 A JP16566980 A JP 16566980A JP 16566980 A JP16566980 A JP 16566980A JP S5787919 A JPS5787919 A JP S5787919A
Authority
JP
Japan
Prior art keywords
raw material
pins
leaf spring
molds
hardened
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.)
Granted
Application number
JP16566980A
Other languages
Japanese (ja)
Other versions
JPS6353937B2 (en
Inventor
Shuji Hiromoto
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.)
NHK Spring Co Ltd
Original Assignee
NHK Spring Co 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 NHK Spring Co Ltd filed Critical NHK Spring Co Ltd
Priority to JP16566980A priority Critical patent/JPS5787919A/en
Publication of JPS5787919A publication Critical patent/JPS5787919A/en
Publication of JPS6353937B2 publication Critical patent/JPS6353937B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Drilling And Boring (AREA)

Abstract

PURPOSE: To make hole machining easy, by a method wherein pins are forced into non-hardened FRP raw material and pulled away after the raw material is approximately hardened, a hole is bored at subsequent machining, and reduction of strength caused by cutting or transferring of reinforcing fiber at forcing of pins is prevented.
CONSTITUTION: Molds 1, 1 are provided with pins 2, 2 opposed with each other in approximately concentric state, a raw material 3 for leaf spring is pushed in thickness direction by the molds 1, 1 and the pins 2, 2 are forced into the raw material 3. After the raw material 3 is nearly hardened, the molds 1, 1 are separated from each other and the pins 2, 2 are pulled away, thereby the raw material 3 with blank holes 4, 4 opposed in approximately concentric state is obtained. A through hole 5 is bored at approximately concentric to the blind holes 4, 4 and the same diameter as that of the blind holes, thereby a leaf spring A is obtained.
COPYRIGHT: (C)1982,JPO&Japio
JP16566980A 1980-11-25 1980-11-25 Hole machining method of frp leaf spring Granted JPS5787919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16566980A JPS5787919A (en) 1980-11-25 1980-11-25 Hole machining method of frp leaf spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16566980A JPS5787919A (en) 1980-11-25 1980-11-25 Hole machining method of frp leaf spring

Publications (2)

Publication Number Publication Date
JPS5787919A true JPS5787919A (en) 1982-06-01
JPS6353937B2 JPS6353937B2 (en) 1988-10-26

Family

ID=15816764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16566980A Granted JPS5787919A (en) 1980-11-25 1980-11-25 Hole machining method of frp leaf spring

Country Status (1)

Country Link
JP (1) JPS5787919A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5416968A (en) * 1992-02-26 1995-05-23 The Yokohama Rubber Co., Ltd. Metal mold for producing wood golf club head and method of producing the club head
US5841107A (en) * 1992-06-23 1998-11-24 Riva; Franca Sheet perforation apparatus with heated needles and a complementary mold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5416968A (en) * 1992-02-26 1995-05-23 The Yokohama Rubber Co., Ltd. Metal mold for producing wood golf club head and method of producing the club head
US5841107A (en) * 1992-06-23 1998-11-24 Riva; Franca Sheet perforation apparatus with heated needles and a complementary mold

Also Published As

Publication number Publication date
JPS6353937B2 (en) 1988-10-26

Similar Documents

Publication Publication Date Title
PH17138A (en) Process for producing a fiber-reinforced,hydraulically setting composition,the composition produced and the use thereof
AU1292988A (en) Perforating projectile with hard core and ductile guide, and process of manufacture
JPS5787919A (en) Hole machining method of frp leaf spring
PT83358B (en) PROCESS FOR THE PREPARATION OF FROZEN AND FROZEN COD FRUITS
JPS5375948A (en) Optical multi-connector
JPS55161006A (en) Setting method of sintered part in interconnected blined hole
JPS5727130A (en) Production of honeycomb like formed body of activated carbon
ES8304663A1 (en) Method for producing a blank for a sabot.
JPS57208324A (en) Additional processing of coupling sleeve in synchromesh mechanism and its device
JPS528589A (en) Method for cutting hole and groove in hollow bodies
JPS56161122A (en) Perforating method of fiber-reinforced resin molded product
JPS5410482A (en) Method of and material for cutting hole for cast
JPS5793120A (en) Hole-punching method for frp leaf spring
JPS52116996A (en) Method for shaping superhard gear
JPS55130745A (en) Forming die of member with shaft hole
JPS53115436A (en) Coupling and device therefor
JPS55122644A (en) Production of turnbuckle
JPS5380076A (en) Method of pressing fit metal bar
JPS5214857A (en) Carbon grounding bar manufacturing method
JPS56147960A (en) Manufacture of sprocket
WO1997029224A1 (en) Apparatus for forming a single crystal and method of forming a single crystal by using this apparatus
JPS5668505A (en) Broadside rolling method of plate material
JPS56126043A (en) Forging method of forging material in which defects exist
JPS5486883A (en) Manufacture of parts having slot
JPS569119A (en) Rail cutter