US3626994A - Method of forming clips - Google Patents
Method of forming clips Download PDFInfo
- Publication number
- US3626994A US3626994A US37990A US3626994DA US3626994A US 3626994 A US3626994 A US 3626994A US 37990 A US37990 A US 37990A US 3626994D A US3626994D A US 3626994DA US 3626994 A US3626994 A US 3626994A
- Authority
- US
- United States
- Prior art keywords
- wire
- section
- clip
- forming
- length
- 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
Links
- 238000000034 method Methods 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 235000013580 sausages Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F45/00—Wire-working in the manufacture of other particular articles
- B21F45/16—Wire-working in the manufacture of other particular articles of devices for fastening or securing purposes
- B21F45/24—Wire-working in the manufacture of other particular articles of devices for fastening or securing purposes of staples; of belt-fastening elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F45/00—Wire-working in the manufacture of other particular articles
Definitions
- the customary procedure is for the manufacturer to purchase reels of wire from a wire supplier.
- the wire may be formed to a particular cross section to meet the users specification but, in any event, the usual procedure is for the manufacturer to make the wire to the desired shape by drawing the same through a die in a manner that is well known.
- One of the results of such a drawing process is that the wire develops a twist which makes it unwiedly to handle.
- the wire is of circular cross section there is not particular orientation of the same required relative to its cross section.
- the main object of the present invention is the provision of a method of forming clips from wire of a noncircular cross section and which method obviates the disadvantages of prior art methods presently available.
- Another object of the invention is the provision of a method of forming U-shaped clips of noncircular cross section which permits the use of a compact arrangement of equipment to perform the step of shaping the wire to the noncircular cross section.
- Another object of the invention is the provision of a method for forming U-shaped clips of noncircular cross section which results in a considerable saving and expense over the prior art method of purchasing the wire from a wire manufacturer to the user's specification.
- Still another object of the invention is the provision of a method for forming U-shaped clips from wire of noncircular cross section which has the advantage of permitting the provision of an improved product with an extremely good surface finish.
- FIG. I is a side elevation of a clip-forming press showing the wire feeding and shaping means at one side thereof.
- FIG. 2 is a horizontal section taken in the plane indicated by lines 2-2 of FIG. 1.
- FIG. 3 is a greatly enlarged fragmentary cross section taken through the swagging dies when the same are in their abutting position.
- the present method of forming U-shaped clips from a length of wire, whether the wire be of circular or noncircular cross section, is to feed the wire intermittently into a press provided with a wirecutting punch which cuts off a short length of the wire and, in one operation, bends the cut portion around an anvil to form the U-shaped clip.
- Such a press is shown in FIG. 1 and, in general, includes a ram 2 at the lower end of the connecting rod 3 which is oscillatably mounted at its upper end on an eccentric portion of main shaft 4 which is provided with a flywheel (not shown) driven by any suitable source of power.
- a flywheel (not shown) driven by any suitable source of power.
- Secured to ram 2 is an upper die shoe 8 which is vertically slidable along a pair of vertically extending posts 9 and which has secured thereto a downwardly extending punch 10.
- a lower die shoe 12 is fixed to the base 113 of the press nd fixedly secured to said die shoe I2 is a clip-forming rail 15 which is provided with a curved upper edge around which the wire is bent to form the U- shaped clip. Said rail extends horizontally outwardly from die shoe 12 and the completed clips 16 are fed along the length of said rail as shown in FIG. 2 to the clip packaging operation.
- the wires are fed to the punch through dies 24 in an upstanding portion 25 of a cutoff block generally designated 26.
- the upper surface of the cutoff block is formed with grooves 27, 28 for receiving the wires 20, 21 respectively prior to their passage through dies 24.
- the wire is intennittently fed on each cycle a distance substantially equal to the spacing between the upstanding portions 25 of the two cutoff blocks so that as the punch 10 is urged downwardly from its upper position of FIG. 1 the four wires 20 to 23 are cut.
- the ends of the cut wires are bent around the top of rail 15 by a recessed portion 30 at the lower end of punch 10.
- the final step in the clip-forming operation is performed when the' bottom of the recess 30 engages a stripper plate 31 and forces the same against the crown of the formed clip thereby setting" the bent clip to an almost perfect U-shaped.
- the stripper plate 31 is formed as shown in FIG. 2 and is yieldably supported on three upstanding studs 32 on die shoe 12. The stripper plate 31 is urged to its upper position by compression springs 33. It will be understood that the stripper plate 31 also functions to prevent the punch 10 from dragging the clips upwardly on its return stroke.
- a clip ejector 35 connected by a linkage to the upper and lower die shoes is translated along the length of rail 15 thereby ejecting the clips from the rail-forming station and moving them with the already formed clips along the length of rail 15.
- the wires 20, 21 are initially reeled around drums 40 which are rotatably supported on rollers to permit the wires to be fed off the drums upon the imposition of a slight tension.
- the wires 20, 21 as they come from drums 40 may be conventional wire of circular cross section and are first passed through a block 41 provided with passageways for receiving the wires 20, 2] therethrough so that the wires will be substantially straight as they approach the next operation.
- the swagging operation is performed by a pair of dies; a lower fixed die 37 and an upper reciprocating die 38.
- the reciprocating die 38 may be actuated by a punch generally designated 39 which may be similar to the press employed for forming the U- shaped clips and may in fact be operated from the same shaft 4 which drives the clip-forming press.
- the length of dies 37, 38 is at least equal to but preferably slightly longer than the length of wire required to form a clip. In this way the wire is shaped to the desired noncircular cross section throughout its entire length.
- the intermittent feeding of the wire is accomplished by a pair of upper and lower feed rolls 42, 43 respectively that are keyed to upper and lower shafts 44, 45. These shafts are rotatably supported in a support 47 fixedly secured to the base of the punch press 39.
- each shaft 44, 45 is provided with an overrunning clutch 50 which is designed to permit free rotation in one direction and to prevent any rotation in the reverse direction.
- the lower shaft 45 is provided with a crank arm 52 which is pivotally connected at its outer end to a generally vertically extending connecting rod 53 which in turn is pivotally connected at its upper end to an eccentric 54 carried by a portion of main shaft 4 of press 1.
- feed rolls 42, 43 are not sufficient to deform the wire but is great enough to effect the desired feeding.
- the rolls 42, 43 are formed with peripherally extending grooves of a shape complimentary to the shape of the swaged wire so as to obtain as much area of contact as possible.
- FIG. 3 cooperating portions of dies 37, 38 are shown in their abutting position, in which position the wire is formed to the desired shape by grooves 50, 51 formed respectively in said dies 37, 38.
Abstract
Description
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3799070A | 1970-05-18 | 1970-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3626994A true US3626994A (en) | 1971-12-14 |
Family
ID=21897474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US37990A Expired - Lifetime US3626994A (en) | 1970-05-18 | 1970-05-18 | Method of forming clips |
Country Status (1)
Country | Link |
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US (1) | US3626994A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3793688A (en) * | 1971-05-10 | 1974-02-26 | Kartridg Pak Co | Apparatus for hermetically sealing a package |
US3913628A (en) * | 1971-05-10 | 1975-10-21 | Kartridg Pak Co | Method and apparatus for hermetically sealing a package |
US4031592A (en) * | 1974-05-22 | 1977-06-28 | Karl Schnell | Device for closing elastic packages, particularly flexible tubular casings |
US4368632A (en) * | 1981-01-27 | 1983-01-18 | Kearney-National Inc. | Apparatus for reducing the cross sectional area of a wire |
US4395805A (en) * | 1981-04-30 | 1983-08-02 | Universal Instruments Corporation | Jumper bridge machine |
US5934682A (en) * | 1997-05-19 | 1999-08-10 | Fel-Pro Incorporated | Head gasket with preflattened wire rings and method of making and using same |
US20040250591A1 (en) * | 2001-09-14 | 2004-12-16 | Giorgio Del Fabro | Bending machine for profiles such as reinforcement round pieces or similar |
-
1970
- 1970-05-18 US US37990A patent/US3626994A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3793688A (en) * | 1971-05-10 | 1974-02-26 | Kartridg Pak Co | Apparatus for hermetically sealing a package |
US3913628A (en) * | 1971-05-10 | 1975-10-21 | Kartridg Pak Co | Method and apparatus for hermetically sealing a package |
US4031592A (en) * | 1974-05-22 | 1977-06-28 | Karl Schnell | Device for closing elastic packages, particularly flexible tubular casings |
US4368632A (en) * | 1981-01-27 | 1983-01-18 | Kearney-National Inc. | Apparatus for reducing the cross sectional area of a wire |
US4395805A (en) * | 1981-04-30 | 1983-08-02 | Universal Instruments Corporation | Jumper bridge machine |
US5934682A (en) * | 1997-05-19 | 1999-08-10 | Fel-Pro Incorporated | Head gasket with preflattened wire rings and method of making and using same |
US20040250591A1 (en) * | 2001-09-14 | 2004-12-16 | Giorgio Del Fabro | Bending machine for profiles such as reinforcement round pieces or similar |
US7004003B2 (en) * | 2001-09-14 | 2006-02-28 | M.E.P. Macchine Elettroniche Piegatrici Spa | Bending machine for profiles |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DELAWARE CAPITAL FORMATION, INC., 1100 NORTH MARKE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TIPPER TIE, INC.,;REEL/FRAME:004692/0282 Effective date: 19870403 |
|
AS | Assignment |
Owner name: DELAWARE CAPITAL FORMATION, INC.,DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TIPPER TIE, INC.;REEL/FRAME:004764/0339 Effective date: 19870813 Owner name: DELAWARE CAPITAL FORMATION, INC., RODNEY SQUARE NO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TIPPER TIE, INC.;REEL/FRAME:004764/0339 Effective date: 19870813 |
|
AS | Assignment |
Owner name: CHASE MANHATTAN BANK, N.A., THE, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:RHEEM MANUFACTURING COMPANY, A DE CORP.;REEL/FRAME:006528/0013 Effective date: 19930405 |