EP0935507A1 - Method for making blanks for parts of pliers - Google Patents
Method for making blanks for parts of pliersInfo
- Publication number
- EP0935507A1 EP0935507A1 EP97943040A EP97943040A EP0935507A1 EP 0935507 A1 EP0935507 A1 EP 0935507A1 EP 97943040 A EP97943040 A EP 97943040A EP 97943040 A EP97943040 A EP 97943040A EP 0935507 A1 EP0935507 A1 EP 0935507A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- profile
- sections
- blank
- shaped
- 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
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005520 cutting process Methods 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000005242 forging Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 abstract 1
- 210000003323 beak Anatomy 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/60—Making other particular articles cutlery wares; garden tools or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/14—Making other products
- B21C23/142—Making profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/02—Jaws
Definitions
- the present invention relates to a method for manufacturing blanks of metal parts of pliers comprising a jaw.
- the object of the invention is to enable the industrial production of wide ranges of pliers with reduced tools, and therefore in a particularly economical manner.
- the manufacturing method according to the invention is characterized in that the contour of each blank is cut from a section of profile of respective shape of variable thickness, the section of which corresponds to at least one ' section of the draft.
- This process may include one or more of the features of claims 2 to 11.
- the invention also relates to a method for manufacturing a half-clamp.
- a blank is produced as described above which comprises a pliers branch core, and a pliers handle is overmolded on this core.
- the overmolding mold is closed on an adapter ring threaded onto the branch core.
- a blank is produced as described above, which includes a pliers branch core, the branch core is inserted with play in a cavity of a preformed handle, and the space remaining free is filled in this cavity a filling material.
- Said cavity can in particular open out towards the front and laterally.
- the subject of the invention is also a shaped profile intended for the implementation of a method as defined above.
- FIG. 1 shows in perspective a blank of multi-grip pliers jaws produced in accordance with the invention
- - Figure 2 shows in perspective a shaped profile from which the jaw blank of - Figure 1 is made;
- - Figure 3 shows the section of this profile;
- FIG. 4 illustrates in perspective the cutting of blanks such as that of Figure 1 in this profile
- - Figure 5 shows schematically, in longitudinal section, a branch of pliers equipped with a jaw obtained from the blank of Figure 1;
- FIG. 6 illustrates the cutting of blanks of a clamp member in a shaped profile according to the invention
- Figure 7 shows the section of the shape profile
- Figures 8, 10, 12, 14 and 16 are views similar to Figure 6 but relating to other shaped profiles;
- FIG. 18 shows in perspective a clamp member blank obtained from one of any of the profiles of Figures 8 to 15;
- FIG. 19 shows in perspective a half-clamp blank produced in accordance with the invention
- FIG. 20 shows in perspective a profile similar to that of Figures 14 and 15;
- FIG. 22 shows in perspective a base profile with rectangular section
- FIG. 23 illustrates the forging of localized sections of shape section in this basic section, as well as the cutting of half-clamp blanks in these localized sections
- Figure 24 shows in perspective the blank thus obtained
- Figure 25 shows in perspective a basic profile with circular section
- Figure 26 illustrates the forging of localized sections of shape section in this base section
- FIG. 28 shows in perspective another blank of gripper member produced according to the invention and machined to form a gripper member;
- - Figure 29 shows in perspective the corresponding gripper member, on which a gripper handle has been molded;
- FIG. 30 shows in perspective the same clamp member and an attached ring
- FIG. 31 shows the same clamp member equipped with the attached ring and on which a clamp handle has been molded;
- - Figures 32 and 33 schematically show, in longitudinal section, two variants of the half-clamp of Figure 29;
- FIG. 34 illustrates in perspective another embodiment of a half clamp from the clamp member of Figure 28;
- FIG. 36 is a plan view, partially-, partly in section, showing the half-clamp finished.
- the blank 1 of a one-piece jaw intended to equip the protruding branch with a multi-grip pliers.
- This blank consists of a jaw 2 of constant large thickness E, typically of the order of 9 mm, and of a fixing heel 3 of constant thickness e much smaller, typically of the order of E / 2 , or about 4 mm.
- An intermediate bead 4 is provided between the jaw and the heel.
- the blank is symmetrical with respect to its median plane P.
- the heel 3 is delimited, on each face, by a straight shoulder 5, substantially perpendicular to the plane P.
- the shoulder 5 At its root, heel side, the shoulder 5 is bordered by a rectilinear relief groove 6. On the other side, the shoulder 5 is connected to a short flat surface 7 parallel to the plane P, then joins the root of the jaw 2 by an inclined face 8. The angle of this inclined face with the perpendicular to the plane P is preferably at least equal to 30 °, and for example close to this value. Furthermore, the heel 3 is crossed by a wide cutout 9 of oblong shape with rounded ends.
- a series of blanks 1 is produced from a profile 10, obtained by extrusion, shown in Figures 2 and 3.
- This profile has the same section as the blank 1 when looking at the shoulders 5 at the end
- it consists of a part 2 with rectangular section, of constant thickness E, of a part 3 with rectangular section, of constant thickness e . , and, between these two parts, a part 4 in excess thickness.
- the latter has, on the side of the part-2, two faces 8 inclined at the aforementioned angle; on the other side, it has two faces 5 perpendicular to the median plane P, each bordered by a clearance groove 6.
- the faces 8 and 5 are connected on each side by a face 7 parallel to the plane P.
- FIG. 5 There is shown in Figure 5 the assembly of the jaw 12, consisting of the blank 1 machined in the active region 13 ( Figure 1) of the jaw 2, with two sheet metal parts 14, 15 of elongated shape, flat in their front region, which enclose the heel 3, to make the protruding branch 16 of a pliers.
- Each part 14, 15 ends, at the front, with a rectilinear edge 17 which bears on the corresponding shoulder 5 all along the latter. This support, which is made reliable by the presence of the clearance grooves 6, makes it possible to resume the clamping forces when using the tool.
- Each part 14, 15 further comprises two orifices 18 which each fit into a rounded end 19 of the cutout 9, as indicated in phantom in Figure 1.
- the assembly of the parts 12, 14 and 15 is carried out by means of two rivets 20 which pass through these orifices 18 as well as the cutout 19. During their compression, the rods of the two rivets swell, which places them firmly against the edges of the rounded 19.
- Figures 6 and 7 show the production by simple cutting of a series of one-piece clamp members 21 in a profile 10A.
- Each member 21 forms a half-mesh, or half-articulation zone, 22, provided with an orifice 23 for the passage of the hinge pin of the clamp; on one side of this zone, a jaw 24 of the forceps; and on the other side of the zone 22, a branch core 25.
- the jaw 24 is of the universal clamp beak type.
- the shaped section 10A has, in section, three successive parts of increasing thickness: a thick part 24 on the jaw side, an intermediate part 22 corresponding to the half-mesh, and a thin part 25 corresponding to the branch core.
- a thick part 24 on the jaw side On one side (the upper side in Figure 7), the profile is flat on all of the parts 22 and 25, and a face 8A inclined at the aforementioned angle ⁇ connects this plane to the parallel flat face of the part 24.
- the profile is plane over all of the parts 22 and 24, and a face 5B inclined at an angle ⁇ preferably at least equal to 30 °, for example equal to ⁇ , connects this plane to the parallel plane face of the part 25.
- a succession of members 21 are obtained by simply cutting the profile 10A, with their main direction substantially perpendicular to the length of the profile.
- the profile 10B comprises two thin lateral parts 26 of the same thickness, and a thicker central part 27. It is flat on the whole of one of its faces, and on the other face, the part 27 is bordered by two faces 8C inclined at the angle ⁇ .
- the flat underside allows the use of a flat cutting die.
- the same members 21A can be cut from the shaped section 10C shown in Figures 10 and 11, which has a thin central portion 26 and two thick side portions 27. Again, the profile has a completely flat face. In this case, the spouts 24 are cut out in the parts 27, and it is the zones 22, 25 which are arranged head to tail in the central part 26.
- Figures 12 and 13 illustrate a variant very similar to the previous one. However, the central zone 26 of the profile 10D is wider, which allows the blanks 21A to be cut to be brought together.
- the variant 10F of Figures 16 and 17 differs from that of Figures 6 and 7 only in that the lower inclined face 8B is plumb with the upper inclined face 8A.
- the members 21B obtained by cutting this profile 10F consequently differ correspondingly from the members 21.
- Figure 18 shows a perspective view of a clamp member 21A obtained by cutting the profile 10B, 10C, 10D or 10E.
- This blank has a flat face and, on the other side, a gradual change in thickness 28 at the root of its beak 24.
- Figure 20 shows a profile 10G similar to that of Figures 14 and 15, and Figure 21 shows that from this profile, one can cut either a blank of universal clamp member 21A such as that of Figure 18 , or a draft 21C of cutting pliers member with round beak.
- a blank of universal clamp member 21A such as that of Figure 18
- a draft 21C of cutting pliers member with round beak Of course, one can imagine many other configurations of blanks made from the same shape profile. The overall tools for manufacturing a range of pliers is therefore particularly economical.
- This basic profile is forged in several stages ( Figure 23) to form a succession of sections of 10H shape profiles in each of which is inscribed a cutout 33, which is for example that of the blank of universal half-clamp 21D of Figure 24.
- Such a method eliminates the subsequent machining phase of the cutter 121.
- Figures 28 to 36 illustrate three different modes of finishing a half-clamp from a clamp member blank 21F which differs from the blank 21A of Figure 18 only by the presence of reliefs 36, such as notches and an orifice on the branch core 25.
- the reliefs 36 can be obtained by the cut itself.
- the handle 38 is simply overmolded on the core 25.
- This handle can be made of aluminum, aluminum alloy, or of a reinforced or non-reinforced thermoplastic or thermosetting material.
- FIGS. 30 and 31 one begins by forcing, or at least with a tight seal, a ring 40 on the core 25, then the mold for overmolding the handle on this ring is closed.
- the finished half-piece is shown in Figure 31.
- the ring 40 is made of a material having a certain flexibility or ductility in order to adapt internally to the dimensional variations of the core 25, and externally to the contour of the closed mold. This material is for example a plastic material or aluminum.
- the front part of the ring 40 externally enlarged, is visible at the front of the handle and extends the latter.
- the handle 38 As shown in Figures 32 and 33, alternatively, one can perform on the handle 38 a second molding 138, forming a total coating (Figure 32) or partial ( Figure 33), in a relatively flexible material or "g ⁇ p". It is thus possible to obtain a whole range of pliers from the same base handle 38.
- the handle 38 made of plastic, is produced independently by molding and comprises a cavity 41 which opens at its front end through an opening 42 and laterally through an opening 43 ( Figure 34). The walls of the cavity 41 have reliefs 44.
- the core 25 of the clamp member is introduced through the opening 42 ( Figure 35), then additional plastic material 45 is molded into the cavity 41 to secure the two pieces ( Figure 36). You can of course modify the handle in the same way as in Figures 32 and 33.
- the reliefs 36 of the clamp member, and possibly 44 of the handle improve the adhesion between the two parts after overmolding.
- branch finishing modes described above with reference to Figures 28 to 36 are also applicable to metal members obtained by any other suitable process, for example by forging or cutting / stamping of flat sheets.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9612141 | 1996-10-04 | ||
FR9612141A FR2754196B1 (en) | 1996-10-04 | 1996-10-04 | METHOD FOR MANUFACTURING CLAMPS |
PCT/FR1997/001737 WO1998015370A1 (en) | 1996-10-04 | 1997-10-01 | Method for making blanks for parts of pliers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0935507A1 true EP0935507A1 (en) | 1999-08-18 |
EP0935507B1 EP0935507B1 (en) | 2002-04-10 |
Family
ID=9496380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97943040A Expired - Lifetime EP0935507B1 (en) | 1996-10-04 | 1997-10-01 | Method for making blanks for parts of pliers |
Country Status (6)
Country | Link |
---|---|
US (1) | US6318212B1 (en) |
EP (1) | EP0935507B1 (en) |
AU (1) | AU4465997A (en) |
DE (1) | DE69711908T2 (en) |
FR (1) | FR2754196B1 (en) |
WO (1) | WO1998015370A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030090049A (en) * | 2002-05-21 | 2003-11-28 | 현대자동차주식회사 | Method for manufacturing aluminium lower arm of vehicle |
TWI650064B (en) * | 2018-02-14 | 2019-02-11 | 慶璉實業股份有限公司 | Tree scissors seat manufacturing method |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB213812A (en) * | 1923-06-19 | 1924-04-10 | Gustav Klauke | Tool insulator specially for the handles of pliers and the like |
FR1054724A (en) * | 1952-04-21 | 1954-02-12 | Manufacturing process of measuring vessels for liquids | |
US2825248A (en) * | 1955-11-28 | 1958-03-04 | Fred E Ahlbin | Scissors and method of making |
US3114973A (en) * | 1962-04-25 | 1963-12-24 | Ekco Products Company | Knife assembly |
FI51063C (en) * | 1975-06-11 | 1976-10-11 | Fiskars Ab Oy | Mounting arrangement for scissors and similar plastic handles. |
JPS6076235A (en) * | 1983-09-14 | 1985-04-30 | Riken Kaki Kogyo Kk | Manufacture of plyer |
CA1306959C (en) * | 1987-11-02 | 1992-09-01 | James H. Sheets | Brake shoe rib and a method of making same |
DE9112630U1 (en) * | 1991-10-10 | 1991-12-12 | Fa. Hans Plier, 5630 Remscheid | Pliers handle |
US5244141A (en) * | 1992-05-15 | 1993-09-14 | Doolittle Milton A | Method of manufacturing multi-characteristic small thin flat metallic parts |
US5253557A (en) * | 1992-11-12 | 1993-10-19 | The Triangle Tool Group, Inc. A Subsidiary Of The Triangle Corporation | Ergonomic handle construction for hand-held tools |
US5528834A (en) * | 1994-01-12 | 1996-06-25 | Buck Knives, Inc. | Fixed-blade knife for rugged service and its manufacture |
US5551323A (en) * | 1995-03-22 | 1996-09-03 | Beere Precision Medical Instruments, Inc. | Screwdriver handle |
US5809853A (en) * | 1996-10-23 | 1998-09-22 | Hudson; Robert V. | Protective grip for pliers-type tool |
-
1996
- 1996-10-04 FR FR9612141A patent/FR2754196B1/en not_active Expired - Fee Related
-
1997
- 1997-10-01 AU AU44659/97A patent/AU4465997A/en not_active Abandoned
- 1997-10-01 WO PCT/FR1997/001737 patent/WO1998015370A1/en active IP Right Grant
- 1997-10-01 EP EP97943040A patent/EP0935507B1/en not_active Expired - Lifetime
- 1997-10-01 DE DE69711908T patent/DE69711908T2/en not_active Expired - Lifetime
- 1997-10-01 US US09/269,884 patent/US6318212B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9815370A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2754196B1 (en) | 1998-12-18 |
DE69711908D1 (en) | 2002-05-16 |
AU4465997A (en) | 1998-05-05 |
WO1998015370A1 (en) | 1998-04-16 |
US6318212B1 (en) | 2001-11-20 |
FR2754196A1 (en) | 1998-04-10 |
DE69711908T2 (en) | 2002-11-07 |
EP0935507B1 (en) | 2002-04-10 |
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