US20010011039A1 - Nut punching apparatus - Google Patents

Nut punching apparatus Download PDF

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Publication number
US20010011039A1
US20010011039A1 US09/769,356 US76935601A US2001011039A1 US 20010011039 A1 US20010011039 A1 US 20010011039A1 US 76935601 A US76935601 A US 76935601A US 2001011039 A1 US2001011039 A1 US 2001011039A1
Authority
US
United States
Prior art keywords
punch
nut
fore end
striking
pin
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.)
Abandoned
Application number
US09/769,356
Other languages
English (en)
Inventor
Hiroshi Shinjo
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.)
Shinjo Manufacturing Co Ltd
Original Assignee
Shinjo Manufacturing 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 Shinjo Manufacturing Co Ltd filed Critical Shinjo Manufacturing Co Ltd
Assigned to YUGENKAISHA SHINJO SEISAKUSHO reassignment YUGENKAISHA SHINJO SEISAKUSHO ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SHINJO, HIROSHI
Publication of US20010011039A1 publication Critical patent/US20010011039A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B23P19/06—Screw or nut setting or loosening machines
    • B23P19/062—Pierce nut setting machines

Definitions

  • the present invention relates to a nut punching apparatus for use to strike the self-piercing nuts or the clinch nuts to a metal plate workpiece, so as to fix them thereon.
  • An object of the present invention made in view of this drawback in the prior art is therefore to provide a novel type of nut punching apparatus that can operate smoothly and quickly to accurately position every nut on any desired portion of the workpiece, to which the nut has to be struck and fixed.
  • the apparatus of the invention comprises a striking punch for thrusting a nut onto a metal plate, a caulking die facing the punch through the metal plate, a nut feeding guide having a punch passage and a nut delivery opening, the passage accommodating the punch to be slidable therein, the opening extending perpendicular to the passage, and a driving means for moving the nut feeding guide fore and aft along the punch longitudinally thereof.
  • the apparatus characteristically comprises a positioning pin that extends through the striking punch along an axis thereof so that a fore end portion of the pin reciprocates between its projected position ahead the fore end of the punch and its retracted position behind this fore end, such that the pin penetrates a threaded bore of the nut which will have arrived at the transfer zone ahead the punch, whereby the projected fore end portion of the pin passing through the nut is brought into engagement with a positioning aperture previously formed in the metal plate at its portion to which the nut will subsequently be punched and attached.
  • the positioning pin may be held in a bore that is formed through the striking punch, and a pneumatic cylinder may be disposed in a basal end of the punch so as to drive the pin to retractably project its fore end portion beyond the fore end of the punch.
  • a pair of resilient pawls facing one another may be disposed on opposite lateral sides of the punch fore end so that the nut having arrived at the transfer zone will be gripped with these pawls.
  • FIG. 1 is a front elevation of a nut punching apparatus that is provided in the present invention and shown in its vertical cross section, wherein nuts are being fed towards a transfer zone;
  • FIG. 2 is a left side elevation of the apparatus shown in FIG. 1;
  • FIG. 3 is another front elevation of the apparatus shown in its status ready for the striking of the nut
  • FIG. 4 is a left side elevation of the apparatus shown in FIG. 3;
  • FIG. 5 is a further front elevation of the apparatus shown in its status when positioning the nut.
  • FIG. 6 is a still further front elevation of the apparatus shown in its status when punching the nut.
  • FIGS. 1 and 2 show the invention embodied in a nut punching apparatus that comprises a striking punch 1 and a caulking die 2 disposed to face the punch.
  • a workpiece ‘W’ i.e., a metal plate will intervene between the punch 1 and die 2 , which are designed to sequentially punch self-piercing nuts or clinch nuts (hereinafter referred to simply as ‘nuts’) onto the workpiece ‘W’.
  • the striking punch 1 has a basal end fixed on a back plate 4 by means of a punch holder 3 .
  • the back plate 4 is secured to a base of a pressing machine (not shown) so that the punch 1 has an axis extending vertically to have its fore end portion located upwards.
  • a pair of resilient pawls 5 and 5 facing one another are disposed on opposite lateral sides of a fore end of the striking punch 1 .
  • Each pawl 5 is a leaf spring connected by a screw, not shown, to the side of said punch side.
  • a preceding one of the nuts ‘N’ will arrive at a transfer zone that is located ahead the punch fore end so as to be gripped by and between the resilient pawls 5 .
  • a stopper 6 defining an outer or downstream boundary for the transfer zone will serve to cause each nut to take its accurate position in said zone.
  • the caulking die 2 facing the punch 1 is mounted on a press ram (not shown) in the pressing machine.
  • This die 2 located above the pressing punch stands precisely in an axial alignment therewith.
  • the press ram will drive and carry the caulking die 2 in axial direction towards and away from the striking punch 1 .
  • a nut feeding guide 10 is operatively combined with the striking punch 1 so as to slide relative thereto in axial direction thereof.
  • a punch passage 11 that is a through-hole formed in the guide 10 , will allow the punch to slide in axial direction.
  • a nut delivery opening 12 formed also in the nut feeding guide 10 extends perpendicularly to the punch passage 11 .
  • a flexible hose 13 is connected to the delivery opening 12 so that the nuts ‘N’ are successively supplied towards the punch.
  • the nuts will be sent one after another to the transfer zone located ahead the punch's 1 fore end which is temporarily at its position enclosed in the passage 11 .
  • a pneumatic cylinder 14 fixed on the back plate 4 will drive the nut feeding guide 10 along the striking punch 1 .
  • a piston rod 15 of the double-action cylinder 14 extends in parallel with the punch and has en end secured to the feeding guide 10 .
  • this guide will move fore and aft (viz., up and down in the drawings) along the punch 1 and in unison with the piston rod 15 .
  • the nuts ‘N’ advancing through the delivery opening 12 will be delivered one by one to the transfer zone that is then located ahead the punch fore end but retracted in the punch passage 11 .
  • the striking punch 1 included in the nut punching apparatus of the invention does further comprise a positioning pin 20 .
  • This pin is able to reciprocate along the axis of the punch so that its fore end portion 20 a can be projected forwards beyond or retracted backwards behind the fore end of striking punch 1 .
  • an axial bore 21 accommodates therein the positioning pin 20 to slide in axial direction.
  • a basal end 20 b of such a pin is connected to a piston 23 of a pneumatic cylinder 22 that is disposed in the basal end portion of the punch.
  • a compression spring 24 fitted in the pneumatic cylinder 22 always urges the fore end portion 20 a of the positioning pin 20 to sink and descend into the axial bore 21 .
  • FIGS. 1 and 2 shows the nut feeding guide 10 at its raised position wherein the preceding one of the nuts ‘N’ being successively fed through the hose 13 has just moved into the transfer zone above the punch's fore end.
  • the preceding nut ‘N’ thus discharged from the nut delivery opening 12 to said zone located inside the passage 11 is gripped with the pair of pawls 2 also located inside this passage.
  • the fore end portion 20 a of the positioning pin 20 is at its retracted position behind the fore end of the striking punch 1 , lest the nut ‘N’ should be hindered from advancing smoothly.
  • the nut feeding guide 10 will descend as seen in FIGS. 3 and 4, being driven by the one or main pneumatic cylinder 14 . Simultaneously with this motion, a compressed air will be charged to the other or supplementary pneumatic cylinder 22 to lift the positioning pin 20 against the compression spring 24 .
  • the fore end portion 20 a of the pin is at its position extended above the fore end of the striking punch 1 . This means that the said end portion 20 a protrudes up and out through the threaded bore of nut ‘N’ being held in place by the stopper 6 and pawls 5 .
  • a positioning aperture 30 has previously been formed in the workpiece ‘W’ at its portion to which the nut ‘N’ has to be attached.
  • the workpiece will then be placed between the caulking die 2 and the striking punch 1 that has been made ready for punching the nut, and its position will be adjusted by engaging the aperture 30 with the projected fore end 20 a of the positioning pin 20 (see FIG. 5).
  • the caulking die 2 will descend as shown in FIG. 6 to cooperate with the punch 1 to forcibly grip between them the workpiece ‘W’, with a force enough for it to be bitten with the nut ‘N’.
  • the caulking die 2 will ascend to return both the positioning pin 20 and the nut feeding guide 10 to their home positions shown in FIG. 1.
  • the striking punch 1 located below the caulking die 2 ascending and descending does stand still.
  • a reversed arrangement may be employed instead, wherein the caulking die 2 is located below the punch 1 which will be driven up and down in this case.
  • the positioning pin incorporated in the striking punch penetrates the threaded bore of each nut that has been placed in the transfer zone above the punch for end.
  • the fore end portion of such a pin will remain engaged with a positioning aperture formed in and at each desired point of the workpiece, during the subsequent punching process.
  • the positioning operation can be done more simply and quickly on one hand, and the nuts can be punched exactly into all the desired points in the workpiece on the other hand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
US09/769,356 2000-01-31 2001-01-26 Nut punching apparatus Abandoned US20010011039A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-021492 2000-01-31
JP2000021492A JP2001205524A (ja) 2000-01-31 2000-01-31 ナット打込み装置

Publications (1)

Publication Number Publication Date
US20010011039A1 true US20010011039A1 (en) 2001-08-02

Family

ID=18547895

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/769,356 Abandoned US20010011039A1 (en) 2000-01-31 2001-01-26 Nut punching apparatus

Country Status (3)

Country Link
US (1) US20010011039A1 (de)
JP (1) JP2001205524A (de)
DE (1) DE10101304A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040261258A1 (en) * 2003-06-24 2004-12-30 Vrana John J. Pierce nut installation apparatus
EP2263826A1 (de) * 2009-06-15 2010-12-22 Shinjo Manufacturing Co. Ltd. Vorrichtung zum Zuführen von Muttern in eine Verbindungsmachine
US20120124812A1 (en) * 2010-11-22 2012-05-24 Shinjo Manufacturing Co., Ltd. Method for fixing piercing nut
CN108621087A (zh) * 2018-05-30 2018-10-09 广东盈峰材料技术股份有限公司 一种新型的自动组装机
CN108838290A (zh) * 2018-08-03 2018-11-20 上海顶点实业有限公司 一种端盖出料装置和铆接机
CN111589977A (zh) * 2020-05-29 2020-08-28 上海东风汽车专用件有限公司 一种螺母冲压设备
CN112643779A (zh) * 2020-12-25 2021-04-13 郑友凤 一种针对pcb板固定座用的通孔成型设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105364455A (zh) * 2015-11-24 2016-03-02 徐州科源液压股份有限公司 湿式常闭制动器挡圈安装装置
CN114850851B (zh) * 2022-05-23 2024-05-24 广州市高比电梯装饰工程有限公司 一种钣金加工用螺母压铆机

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040261258A1 (en) * 2003-06-24 2004-12-30 Vrana John J. Pierce nut installation apparatus
WO2005005095A1 (en) * 2003-06-24 2005-01-20 Whitesell International Corporation Pierce nut installation apparatus
US6912776B2 (en) 2003-06-24 2005-07-05 Fabristeel Products, Inc. Pierce nut installation apparatus
EP2263826A1 (de) * 2009-06-15 2010-12-22 Shinjo Manufacturing Co. Ltd. Vorrichtung zum Zuführen von Muttern in eine Verbindungsmachine
US20120124812A1 (en) * 2010-11-22 2012-05-24 Shinjo Manufacturing Co., Ltd. Method for fixing piercing nut
US8931160B2 (en) * 2010-11-22 2015-01-13 Shinjo Manufacturing Co., Ltd. Method for fixing piercing nut
CN108621087A (zh) * 2018-05-30 2018-10-09 广东盈峰材料技术股份有限公司 一种新型的自动组装机
CN108838290A (zh) * 2018-08-03 2018-11-20 上海顶点实业有限公司 一种端盖出料装置和铆接机
CN111589977A (zh) * 2020-05-29 2020-08-28 上海东风汽车专用件有限公司 一种螺母冲压设备
CN112643779A (zh) * 2020-12-25 2021-04-13 郑友凤 一种针对pcb板固定座用的通孔成型设备

Also Published As

Publication number Publication date
JP2001205524A (ja) 2001-07-31
DE10101304A1 (de) 2001-08-02

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Legal Events

Date Code Title Description
AS Assignment

Owner name: YUGENKAISHA SHINJO SEISAKUSHO, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHINJO, HIROSHI;REEL/FRAME:011483/0528

Effective date: 20001220

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION