EP0406202A2 - A clamping device for making nails - Google Patents
A clamping device for making nails Download PDFInfo
- Publication number
- EP0406202A2 EP0406202A2 EP90850253A EP90850253A EP0406202A2 EP 0406202 A2 EP0406202 A2 EP 0406202A2 EP 90850253 A EP90850253 A EP 90850253A EP 90850253 A EP90850253 A EP 90850253A EP 0406202 A2 EP0406202 A2 EP 0406202A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- recess
- clamping device
- die holder
- clamping
- 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
Links
Images
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
- B21J13/02—Dies or mountings therefor
- B21J13/03—Die mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
- B21G3/00—Making pins, nails, or the like
- B21G3/12—Upsetting; Forming heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
- B21G3/00—Making pins, nails, or the like
- B21G3/18—Making pins, nails, or the like by operations not restricted to one of the groups B21G3/12 - B21G3/16
- B21G3/28—Making pins, nails, or the like by operations not restricted to one of the groups B21G3/12 - B21G3/16 by forging or pressing
Definitions
- the present invention relates to a clamping device for making nails, comprising a die holder which is mountable in a nail-making machine and a hard-metal die disposed in said die holder, the hard-metal die having a clamping part which together with a corresponding clamping part of a complementary clamping device holds a nail during the manufacture thereof.
- Clamping devices of the above-mentioned kind are previously known. They are provided in pairs in a nail-making machine and hold the nail while a head is being formed and the nail is cut off from a metal wire.
- the known clamping devices comprise a die holder provided with a recess, in which a hard metal die has been mounted by soldering. The reason why the entire clamping device is not made of hard metal is the high material costs. Although the clamping parts are made of hard metal they wear out after some time of use, and the whole clamping device will then be discarded and replaced by a new one, since the cost of removing the die and mounting a new die in the die holder will not be less than that of replacing the whole clamping device and since the tensile properties of the die holder become impaired.
- clamping devices shown in the figures are used in pairs, as shown in Figure 4, in a nail-making machine to clamp a wire while a head is being formed at the open end of the wire by means of a punch and the wire is cut to the length of the nail by cutting tools working in pairs.
- Each of the two clamping devices which are of essentially the same shape, comprises a die holder 1 intended to be mounted in the nail-making machine, and a hard-metal die 2, which is detachably mounted in the die holder.
- the die holder 1 which is made of steel, has a parallel-trapezoidal cross section and is provided with a recess in the form of a drilled hole 3 at one end.
- the circumference of the drilled hole 3 is smaller than the circum ference of a circle, so that the drilled hole opens at said end along two parallel edges 4 and 5, the distance between which is considerably smaller than and preferably around two fifths of the diameter of the drilled hole.
- the edges 4, 5 delimit parallel surfaces 6 and 7 on the die holder 1, the parallel surfaces connecting on to bevels 8 and 9.
- a smaller drilled hole 10 parallel with the drilled hole 3 but of a smaller diameter than the drilled hole is connected with the drilled hole 3 by means of a through slot 11.
- a through hole 12 intersects the slot 11 and is provided, on one side of the slot, with a thread 13.
- a bolt 14 is inserted in the drilled hole 12 and presses the two tool portions 1a and 1b on both sides of the slot against each other on tightening, since said portions are flexible.
- the die 2 is substantially cylindrical and has a diameter which is slightly smaller than the diameter of the drilled hole 3. Its length corresponds to the length of the drilled hole 3.
- the die 2 is formed with three plane surfaces in which clamping parts in the form of clamping grooves 15 are provided.
- Each clamping groove comprises a semi-cylindrical portion 16 with a plurality of annular slots 17, and a semi-frustoconical portion 18. All the clamping grooves 15 can be identical or of different dimensions adapted to different nail sizes and shapes.
- the clamping grooves 15 can be less or more than three in number and are suitably evenly distributed over the circumference of the die.
- the die 2 fits the drilled hole 3 into which it is inserted in the way shown in Figures 1 and 4 and is turnable 360° within the drilled hole.
- the die is lockable in any position in the drilled hole by tightening the bolt 14 which presses the portions 1a and 1b against each other.
- Figure 4 shows two clamping devices, at least one of which is slidable along its longitudinal axis towards and away from the other clamping device.
- two identical clamping parts 15 on the two dies 2 bearing on each other form a circular groove 19, the portions 16 of which are intended to clamp a wire (not shown) from which a nail is to be made, and the portions 18 of which are intended to guide the wire fed to the clamping devices.
- a nail head is intended to be formed from the wire at the open end thereof when a punch (not shown) is struck onto said end in the longitudinal direction of the wire.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
- Adornments (AREA)
- Clamps And Clips (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
Description
- The present invention relates to a clamping device for making nails, comprising a die holder which is mountable in a nail-making machine and a hard-metal die disposed in said die holder, the hard-metal die having a clamping part which together with a corresponding clamping part of a complementary clamping device holds a nail during the manufacture thereof.
- Clamping devices of the above-mentioned kind are previously known. They are provided in pairs in a nail-making machine and hold the nail while a head is being formed and the nail is cut off from a metal wire. The known clamping devices comprise a die holder provided with a recess, in which a hard metal die has been mounted by soldering. The reason why the entire clamping device is not made of hard metal is the high material costs. Although the clamping parts are made of hard metal they wear out after some time of use, and the whole clamping device will then be discarded and replaced by a new one, since the cost of removing the die and mounting a new die in the die holder will not be less than that of replacing the whole clamping device and since the tensile properties of the die holder become impaired.
- It is an object of the present invention to improve clamping devices of the above-mentioned kind and to provide a clamping device in which the die is easily replaceable by a new die in the same die holder, and in which the die is held in the recess of the die holder without being soldered thereto and in which a plurality of clamping parts of the same kind, or a plurality of clamping parts of different kinds adapted to different nail shapes and/or dimensions, can be formed on the die and brought into contact with the complementary clamping device of the pair of clamping devices, thereby extending the life of the die and the field of applications and reducing the number of dies to be manufactured and kept in stock. Further, time will be saved, since it is easier to exchange the die in the existing die holder when, later on, the clamping device is mounted in the machine, than it would be to exchange the entire clamping device.
- This object is accomplished by providing the clamping device according to the invention with the features stated in the characterizing portions of the claims.
-
- Figure 1 is a perspective view of a clamping device according to the invention, seen obliquely from above and from the front,
- Figure 2 is a perspective view of a die holder included in the clamping device according to Figure 1, seen obliquely from below and from the rear;
- Figure 3 is a perspective view of a hard-metal die included in the clamping device according to Figure 1, seen obliquely from below and from the rear, and
- Figure 4 is a top plan view of two complementary clamping devices according to Figure 1.
- The clamping devices shown in the figures are used in pairs, as shown in Figure 4, in a nail-making machine to clamp a wire while a head is being formed at the open end of the wire by means of a punch and the wire is cut to the length of the nail by cutting tools working in pairs.
- Each of the two clamping devices, which are of essentially the same shape, comprises a
die holder 1 intended to be mounted in the nail-making machine, and a hard-metal die 2, which is detachably mounted in the die holder. - The
die holder 1, which is made of steel, has a parallel-trapezoidal cross section and is provided with a recess in the form of a drilled hole 3 at one end. The circumference of the drilled hole 3 is smaller than the circum ference of a circle, so that the drilled hole opens at said end along twoparallel edges edges parallel surfaces die holder 1, the parallel surfaces connecting on tobevels hole 10 parallel with the drilled hole 3 but of a smaller diameter than the drilled hole is connected with the drilled hole 3 by means of a throughslot 11. A throughhole 12 intersects theslot 11 and is provided, on one side of the slot, with athread 13. Abolt 14 is inserted in the drilledhole 12 and presses the two tool portions 1a and 1b on both sides of the slot against each other on tightening, since said portions are flexible. - The die 2 is substantially cylindrical and has a diameter which is slightly smaller than the diameter of the drilled hole 3. Its length corresponds to the length of the drilled hole 3. On its mantle surface, the
die 2 is formed with three plane surfaces in which clamping parts in the form ofclamping grooves 15 are provided. Each clamping groove comprises asemi-cylindrical portion 16 with a plurality ofannular slots 17, and asemi-frustoconical portion 18. All theclamping grooves 15 can be identical or of different dimensions adapted to different nail sizes and shapes. Theclamping grooves 15 can be less or more than three in number and are suitably evenly distributed over the circumference of the die. - The
die 2 fits the drilled hole 3 into which it is inserted in the way shown in Figures 1 and 4 and is turnable 360° within the drilled hole. The die is lockable in any position in the drilled hole by tightening thebolt 14 which presses the portions 1a and 1b against each other. - Figure 4 shows two clamping devices, at least one of which is slidable along its longitudinal axis towards and away from the other clamping device. In the positions of the clamping devices according to Figure 4, two
identical clamping parts 15 on the twodies 2 bearing on each other form a circular groove 19, theportions 16 of which are intended to clamp a wire (not shown) from which a nail is to be made, and theportions 18 of which are intended to guide the wire fed to the clamping devices. At the portion of each clampingpart 15 furthest away from theportion 18, a nail head is intended to be formed from the wire at the open end thereof when a punch (not shown) is struck onto said end in the longitudinal direction of the wire. - While there has been described above and shown on the drawings an embodiment of the invention, it will be appreciated that the invention is not limited to this embodiment but only by what is stated in the claims.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8902386A SE467530B (en) | 1989-06-30 | 1989-06-30 | CLAUM BACK FOR SPIKE MANUFACTURING |
SE8902386 | 1989-06-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0406202A2 true EP0406202A2 (en) | 1991-01-02 |
EP0406202A3 EP0406202A3 (en) | 1991-07-24 |
EP0406202B1 EP0406202B1 (en) | 1994-06-01 |
Family
ID=20376450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90850253A Expired - Lifetime EP0406202B1 (en) | 1989-06-30 | 1990-06-26 | A clamping device for making nails |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0406202B1 (en) |
AT (1) | ATE106292T1 (en) |
DE (1) | DE69009310T2 (en) |
FI (1) | FI95213C (en) |
SE (1) | SE467530B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0504995A1 (en) * | 1991-03-20 | 1992-09-23 | Plansee Tizit Gesellschaft M.B.H. | Pinch-pointing jaws |
US6780116B2 (en) | 2001-08-13 | 2004-08-24 | Kennametal Inc. | Wear resistant nail manufacturing tool inserts |
US6786828B2 (en) | 2002-04-17 | 2004-09-07 | Soerensen Svend-Helge Sell | Method of fastening a tool in a tool holder |
WO2004101194A1 (en) * | 2003-05-14 | 2004-11-25 | Enkotec A/S | Inhibiting metal fatigue in a tool secured in a tool holder |
US7090585B2 (en) * | 2004-02-27 | 2006-08-15 | Kennametal Inc. | Nail manufacturing tool holder having a quick change mechanism |
WO2009052538A1 (en) * | 2007-10-22 | 2009-04-30 | Ceratizit Austria Gesellschaft M.B.H. | Tool for clamping or cutting to length, and clamping jaw or cutting body |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD40525A (en) * | ||||
DE369347C (en) * | 1923-02-17 | Karl Hubschneider | Filing stick | |
US2550949A (en) * | 1948-03-19 | 1951-05-01 | Weidner Hilda | Thread chasing tool |
-
1989
- 1989-06-30 SE SE8902386A patent/SE467530B/en not_active Application Discontinuation
-
1990
- 1990-06-26 AT AT90850253T patent/ATE106292T1/en active
- 1990-06-26 EP EP90850253A patent/EP0406202B1/en not_active Expired - Lifetime
- 1990-06-26 DE DE69009310T patent/DE69009310T2/en not_active Expired - Fee Related
- 1990-06-29 FI FI903321A patent/FI95213C/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD40525A (en) * | ||||
DE369347C (en) * | 1923-02-17 | Karl Hubschneider | Filing stick | |
US2550949A (en) * | 1948-03-19 | 1951-05-01 | Weidner Hilda | Thread chasing tool |
Non-Patent Citations (1)
Title |
---|
TECHNISCHE RUNDSCHAU. vol. 57, no. 8, 26 February 1965, BERN CH page 37 "DREHMEISSELHALTER ZUM SPANNEN KURZER RUNDER DREHMEISSEL" * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0504995A1 (en) * | 1991-03-20 | 1992-09-23 | Plansee Tizit Gesellschaft M.B.H. | Pinch-pointing jaws |
AT397218B (en) * | 1991-03-20 | 1994-02-25 | Plansee Tizit Gmbh | Pinch |
US6780116B2 (en) | 2001-08-13 | 2004-08-24 | Kennametal Inc. | Wear resistant nail manufacturing tool inserts |
US6786828B2 (en) | 2002-04-17 | 2004-09-07 | Soerensen Svend-Helge Sell | Method of fastening a tool in a tool holder |
WO2004101194A1 (en) * | 2003-05-14 | 2004-11-25 | Enkotec A/S | Inhibiting metal fatigue in a tool secured in a tool holder |
CN100355516C (en) * | 2003-05-14 | 2007-12-19 | 伊科泰克公司 | Inhibiting metal fatigue in a tool secured in a tool holder |
US7090585B2 (en) * | 2004-02-27 | 2006-08-15 | Kennametal Inc. | Nail manufacturing tool holder having a quick change mechanism |
WO2009052538A1 (en) * | 2007-10-22 | 2009-04-30 | Ceratizit Austria Gesellschaft M.B.H. | Tool for clamping or cutting to length, and clamping jaw or cutting body |
Also Published As
Publication number | Publication date |
---|---|
DE69009310D1 (en) | 1994-07-07 |
SE8902386D0 (en) | 1989-06-30 |
SE8902386L (en) | 1990-12-31 |
DE69009310T2 (en) | 1995-01-19 |
EP0406202B1 (en) | 1994-06-01 |
ATE106292T1 (en) | 1994-06-15 |
EP0406202A3 (en) | 1991-07-24 |
FI95213B (en) | 1995-09-29 |
FI95213C (en) | 1996-01-10 |
FI903321A0 (en) | 1990-06-29 |
SE467530B (en) | 1992-08-03 |
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