EP0935507A1 - Method for making blanks for parts of pliers - Google Patents

Method for making blanks for parts of pliers

Info

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
Application number
EP97943040A
Other languages
German (de)
French (fr)
Other versions
EP0935507B1 (en
Inventor
Hervé GOMAS
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.)
Bost Garnache Industries BGI SAS
Original Assignee
Bost Garnache Industries BGI SAS
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 Bost Garnache Industries BGI SAS filed Critical Bost Garnache Industries BGI SAS
Publication of EP0935507A1 publication Critical patent/EP0935507A1/en
Application granted granted Critical
Publication of EP0935507B1 publication Critical patent/EP0935507B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Abstract

The method consists in cutting out the outlines (11) of a series of blanks in lengths of shaping sections (10) of variable thickness whereof the cross-section corresponds at least to one cross-section of the blanks. The invention is useful for making clamp jaws and elements of various pliers.

Description

" Procédé de fabrication d'ébauches de pièces à pinces", "Method for manufacturing blanks of gripper parts",
La présente invention est relative à un procédé de fabrication d'ébauches de pièces métalliques de pinces comprenant une mâchoire.The present invention relates to a method for manufacturing blanks of metal parts of pliers comprising a jaw.
Les techniques actuelles de fabrication des pièces métalliques de pinces, à savoir les mors des pinces multiprises et les têtes de travail et/ou les branches des autres types de pinces, imposent de gérer un parc d'outillage coûteux et complexe. Ces techniques connues sont en effet le forgeage ou le découpage/emboutissage de tôles plates.Current techniques for manufacturing metal parts of pliers, namely the jaws of pliers and work heads and / or the branches of other types of pliers, require managing a costly and complex tooling fleet. These known techniques are in fact forging or cutting / stamping flat sheets.
L'invention a pour but de permettre la réalisation industrielle de gammes étendues de pinces avec un outillage réduit, et donc de façon particulièrement économique. A cet effet, le procédé de fabrication suivant l'invention est caractérisé en ce qu'on découpe le contour de chaque ébauche dans un tronçon de profilé de forme respectif d'épaisseur variable dont la section correspond à au moins une' section de l'ébauche. Ce procédé peut comporter une ou plusieurs des caractéristiques des revendications 2 à 11.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. To this end, 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.
L'invention a également pour objet un procédé de fabrication d'une demi-pince. Suivant une première variante, on réalise comme décrit plus haut une ébauche qui comporte un noyau de branche de pince, et on surmoule une poignée de pince sur ce noyau. De façon avantageuse, dans ce cas, le moule de surmoulage est fermé sur une bague d'adaptation enfilée sur le noyau de branche.The invention also relates to a method for manufacturing a half-clamp. According to a first variant, a blank is produced as described above which comprises a pliers branch core, and a pliers handle is overmolded on this core. Advantageously, in this case, the overmolding mold is closed on an adapter ring threaded onto the branch core.
Suivant une deuxième variante, on réalise comme décrit plus haut plus haut une ébauche qui comporte un noyau de branche de pince, on introduit avec jeu le noyau de branche dans une cavité d'une poignée préformée, et on remplit l'espace restant libre dans cette cavité d'une matière de remplissage. Ladite cavité peut notamment déboucher vers l'avant et latéralement.According to a second variant, 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.
L'invention a encore pour objet un profilé de forme destiné à la mise en oeuvre d'un procédé tel que défini ci-dessus.The subject of the invention is also a shaped profile intended for the implementation of a method as defined above.
Des exemples de mise en oeuvre de l'invention vont maintenant être décrits en regard des dessins annexés, sur lesquels :Examples of implementation of the invention will now be described with reference to the accompanying drawings, in which:
- la Figure 1 représente en perspective une ébauche de mors de pince multiprise réalisée conformément à 1 ' invention;- Figure 1 shows in perspective a blank of multi-grip pliers jaws produced in accordance with the invention;
- la Figure 2 représente en perspective un profilé de forme à partir duquel l'ébauche de mors de la- Figure 1 est réalisé; - la Figure 3 représente la section de ce profilé;- 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;
- la Figure 4 illustre en perspective la découpe d'ébauches telles que celle de la Figure 1 dans ce profilé; - la Figure 5 représente schématiquement , en coupe longitudinale, une branche de pince multiprise équipée d'un mors obtenu à partir de l'ébauche de la Figure 1;- Figure 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;
- la Figure 6 illustre la découpe d'ébauches d'un membre de pince dans un profilé de forme conformément à L'invention; la Figure 7 représente la section du profilé de forme;- Figure 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;
- les Figures 8, 10, 12, 14 et 16 sont des vues analogues à la Figure 6 mais relatives à d'autres profilés de forme;- Figures 8, 10, 12, 14 and 16 are views similar to Figure 6 but relating to other shaped profiles;
- les Figures 9, 11, 13, 15 et 17 représentent les sections respectives de ces profilés de forme; J- Figures 9, 11, 13, 15 and 17 show the respective sections of these shaped sections; J
- la Figure 18 représente en perspective une ébauche de membre de pince obtenue à partir de 1 ' un quelconque des profilés des Figures 8 à 15;- Figure 18 shows in perspective a clamp member blank obtained from one of any of the profiles of Figures 8 to 15;
- la Figure 19 représente en perspective une ébauche de demi-pince réalisée conformément à l'invention;- Figure 19 shows in perspective a half-clamp blank produced in accordance with the invention;
- la Figure 20 représente en perspective un profilé analogue à celui des Figures 14 et 15;- Figure 20 shows in perspective a profile similar to that of Figures 14 and 15;
- la Figure 21 illustre la découpe d'ébauches de deux membres "de pince différents dans ce profilé;- Figure 21 illustrates the cutting of blanks of two members "different pliers in this profile;
- la Figure 22 représente en perspective un profilé de base à section rectangulaire; la Figure 23 illustre le forgeage de tronçons localisés de profilé de forme dans ce profilé de base, ainsi que la découpe d'ébauches de demi-pince dans ces tronçons localisés; la Figure 24 représente en perspective l'ébauche ainsi obtenue;- Figure 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;
- la Figure 25 représente en perspective un profilé de base à section circulaire; la Figure 26 illustre le forgeage de tronçons localisés de profilé de forme dans ce profilé de base;- 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;
- la Figure 27 illustre la découpe dans ces tronçons localisés d'ébauches de membre de pince;- Figure 27 illustrates the cutting in these localized sections of clamp member blanks;
- la Figure 28 représente en perspective une autre ébauche de membre de pince réalisée conformément à l'invention et usinée pour constituer un membre de pince; - la Figure 29 représente en perspective le membre de pince correspondant, sur lequel une poignée de pince a été surmoulée;- Figure 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;
- la Figure 30 représente en perspective le même membre de pince et une bague rapportée;- Figure 30 shows in perspective the same clamp member and an attached ring;
- la Figure 31 représente le même membre de pince équipé de la bague rapportée et sur lequel une poignée de pince a été surmoulée; - les Figures 32 et 33 montrent schématique- ment, en coupe longitudinale, deux variantes de la demi- pince de la Figure 29;- Figure 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;
- la Figure 34 illustre en perspective un autre mode de réalisation d'une demi-pince à partir du membre de pince de la Figure 28;- Figure 34 illustrates in perspective another embodiment of a half clamp from the clamp member of Figure 28;
- la Figure 35 est une vue en plan correspondante; et- Figure 35 is a corresponding plan view; and
- la Figure 36 est une vue en plan, partiel-, lement en coupe, montrant la demi-pince terminée. On a représenté sur la Figure 1 l'ébauche 1 d'un mors monobloc destiné à équiper la branche entrepassante d'une pince multiprise. Cette ébauche est constituée d'une mâchoire 2 de forte épaisseur E constante, typiquement de l'ordre de 9 mm, et d'un talon de fixation 3 d'épaisseur constante e beaucoup plus faible, typiquement de l'ordre de E/2, soit de l'ordre de 4 mm. Un bourrelet intermédiaire 4 est prévu entre la mâchoire et le talon. L'ébauche est symétrique par rapport à son plan médian P. Le talon 3 est délimité, sur chaque face, par un épaulement 5 rectiligne, sensiblement perpendiculaire au plan P. A sa racine, côté talon, 1 ' épaulement 5 est bordé par une rainure rectiligne de dégagement 6. De l'autre côté, l' épaulement 5 se raccorde à une courte surface plane 7 parallèle au plan P, puis rejoint la racine de la mâchoire 2 par une face inclinée 8. L'angle de cette face inclinée avec la perpendiculaire au plan P est de préférence au moins égal à 30°, et par exemple voisin de cette valeur. Par ailleurs, le talon 3 est traversé par une large découpe 9 de forme oblongue à extrémités arrondies.- Figure 36 is a plan view, partially-, partly in section, showing the half-clamp finished. There is shown in Figure 1 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. 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.
On réalise une succession d'ébauches 1 à partir d'un profilé de forme 10, obtenu par extrusion, représenté sur les Figures 2 et 3. Ce profilé a la même section que l'ébauche 1 lorsqu'on regarde en bout les épaulements 5. Ainsi, en reprenant les mêmes références numériques que ci-dessus, il est constitué d'une partie 2 à section rectangulaire, d'épaisseur constante E, d'une partie 3 à section rectangulaire , d'épaisseur constante e., et, entre ces deux parties, d'une partie 4 en surépaisseur. Cette dernière présente, du côté de la partie- 2, deux faces 8 inclinées suivant l'angle précité; de l'autre côté, elle présente deux faces 5 perpendiculaires au plan médian P, bordées chacune d'une rainure de dégagement 6. Les faces 8 et 5 sont reliées de chaque côté par une face 7 parallèle au plan P.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 Thus, using the same reference numbers as above, 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.
Ainsi, comme représenté sur la Figure 4, il est possible d'obtenir en une seule opération de découpe du profilé 10, effectuée perpendiculairement au plan P, une succession d'ébauches 1, suivant les contours répétitifs 11 indiqués. On utilise bien entendu pour cela une matrice et un poinçon tridimensionnels épousant chacun la forme d'une face du profilé. Il est à noter que la présence des rainures 6 permet d'obtenir un bon appui plan sur les faces de la partie 3, jusqu'aux épaulements 5, tandis que l'inclinaison α des faces 8 facilite le centrage du profilé et l'obtention d'une bonne qualité de découpe.Thus, as shown in FIG. 4, it is possible to obtain, in a single operation for cutting the profile 10, carried out perpendicular to the plane P, a succession of blanks 1, according to the repetitive contours 11 indicated. Of course, a three-dimensional die and punch are used for this, each matching the shape of one face of the profile. It should be noted that the presence of the grooves 6 makes it possible to obtain good plane support on the faces of the part 3, up to the shoulders 5, while the inclination α of the faces 8 facilitates the centering of the profile and obtaining good cutting quality.
On a représenté sur la Figure 5 l'assemblage du mors 12, constitué de l'ébauche 1 usinée dans la région active 13 (Figure 1) de la mâchoire 2, avec deux pièces en tôle 14, 15 de forme allongée, planes dans leur région avant, qui enserrent le talon 3, pour réaliser la branche entrepassante 16 d'une pince multiprise.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.
Chaque pièce 14, 15 se termine, à l'avant, par un bord rectiligne 17 qui prend appui sur 1 ' épaulement 5 correspondant tout le long de celui-ci. Cet appui, qui est rendu fiable par la présence des rainures de dégagement 6, permet de reprendre les efforts de serrage lors de l'utilisation de l'outil. Chaque pièce 14, 15 comporte de plus deux orifices 18 qui s'inscrivent chacun dans un arrondi d'extrémité 19 de la découpe 9, comme indiqué en traits mixtes sur la Figure 1. L'assemblage des pièces 12, 14 et 15 est réalisé au moyen de deux rivets 20 qui traversent ces orifices 18 ainsi que la découpe 19. Lors de leur compression, les tiges des deux rivets gonflent, ce qui les plaque fermement contre les bords des arrondis 19.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.
Les Figures 6 et 7 montrent la réalisation par simple découpe d'une série de membres monoblocs de pince 21 dans un profilé de forme 10A.Figures 6 and 7 show the production by simple cutting of a series of one-piece clamp members 21 in a profile 10A.
Chaque membre 21 forme une demi-maillure, ou demi-zone d'articulation, 22, munie d'un orifice 23 pour le passage de l'axe d'articulation de la pince; d'un côté de cette zone, une mâchoire 24 de la pince; et de l'autre côté de la zone 22, un noyau de branche 25. Dans l'exemple représenté, la mâchoire 24 est du type bec de pince universelle.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. In the example shown, the jaw 24 is of the universal clamp beak type.
Le profilé de forme 10A présente, en section, trois parties successives d'épaisseur croissante : une partie épaisse 24 côté mâchoire, une partie intermédiaire 22 correspondant à la demi-maillure, et une partie mince 25 correspondant au noyau de branche. Sur une face (la face supérieure sur la Figure 7), le profilé est plan sur l'ensemble des parties 22 et 25, et une face 8A inclinée suivant l'angle α précité relie ce plan à la face plane parallèle de la partie 24. Sur l'autre face, le profilé est plan sur l'ensemble des parties 22 et 24, et une face 5B inclinée suivant un angle β de préférence au moins égal à 30°, par exemple égal à α, relie ce plan à la face plane parallèle de la partie 25.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. 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 α connects this plane to the parallel flat face of the part 24. On the other face, the profile is plane over all of the parts 22 and 24, and a face 5B inclined at an angle β preferably at least equal to 30 °, for example equal to α, connects this plane to the parallel plane face of the part 25.
Comme représenté sur la Figure 6, une succession de membres 21 sont obtenus par simple découpe du profilé 10A, avec leur direction principale sensiblement perpendiculaire à la longueur du profilé.As shown in Figure 6, 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.
Dans la variante des Figures 8 et 9, le profilé 10B comporte deux parties latérales minces 26 de même épaisseur, et une partie centrale plus épaisse 27. II est plan sur la totalité d'une de ses faces, et sur l'autre face, la partie 27 est bordée par deux faces 8C inclinées suivant l'angle α. La face inférieure plane permet d'utiliser une matrice de découpage plane.In the variant of FIGS. 8 and 9, 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 α. The flat underside allows the use of a flat cutting die.
Par simple découpe, on réalise à partir du profilé 10B une succession de membres de pince 21A analogues à celui des Figures 6 et 7 mais dans lesquelles les parties 22 et 25 ont la même épaisseur. Les membres 21A sont découpés tête-bêche, avec les becs 24 imbriqués les uns dans les autres dans la région centrale 27 du profilé.By simple cutting, there is produced from the profile 10B a succession of clamp members 21A similar to that of Figures 6 and 7 but in which the parts 22 and 25 have the same thickness. The members 21A are cut head to tail, with the nozzles 24 nested one inside the other in the central region 27 of the profile.
Les mêmes membres 21A peuvent être découpés dans le profilé de forme 10C représenté aux Figures 10 et 11, qui comporte une partie centrale mince 26 et deux parties latérales épaisses 27. De nouveau, le profilé présente une face entièrement plane. Dans ce cas, les becs 24 sont découpés dans les parties 27, et ce sont les zones 22, 25 qui sont disposées tête-bêche dans la partie centrale 26. Les Figures 12 et 13 illustrent une variante très voisine de la preceαente. Toutefois, la zone centrale 26 du profile 10D est plus large, ce qui permet de rapprocher les unes des autres les ébauches 21A à découper.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.
La variante des Figures 14 et 15 est analogue a celle des Figures 6 et 7, a ceci près que les zones 22 et 25 du profile 10E ont la même épaisseur, ce qui permet de donner au profile 10E une face entièrement plane. Les membres obtenus sont du type 21A.The variant of Figures 14 and 15 is similar to that of Figures 6 and 7, except that the zones 22 and 25 of the profile 10E have the same thickness, which makes it possible to give the profile 10E an entirely flat face. The members obtained are of type 21A.
La variante 10F des Figures 16 et 17 ne diffère de celle des Figures 6 et 7 que par le fait que la face inclinée inférieure 8B se trouve a 1 ' aplomb de la face inclinée supérieure 8A. Les membres 21B obtenus par découpage de ce profilé 10F diffèrent par conséquent de façon correspondante des membres 21.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.
La Figure 18 représente en perspective une ébauche de membre de pince 21A obtenue par découpe du profilé 10B, 10C, 10D ou 10E. Cette ébauche comporte une face plane et, de l'autre côté, un changement d'épaisseur progressif 28 à la racine de son bec 24.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.
En augmentant la longueur de la ou de chaque partie du profilé correspondant au noyau de branche 25 (partie 25 des Figures 6 et 7, partie (s) 26 des Figures 8 à 17), on peut réaliser de la même manière, par simple découpe, une ébauche de demi-pmce 29 telle que celle représentée sur la Figure 19. Celle-ci ne diffère de l'ébauche 21A de la Figure 18 que par le prolongement du noyau 25 en une âme de demi-branche entière 30. Non seulement le procédé de découpe décrit ci-dessus permet de réaliser industriellement à grande cadence, et de façon précise et économique, une ébauche donnée, mais encore il permet, à partir du même profilé, de réaliser toute une gamme d'ébauches, qui, par exemple, ne diffèrent les unes des autres que par la forme de la tête de travail.By increasing the length of the or each part of the profile corresponding to the branch core 25 (part 25 of Figures 6 and 7, part (s) 26 of Figures 8 to 17), it can be achieved in the same way, by simple cutting , a half-pmce blank 29 such as that shown in FIG. 19. This differs from the blank 21A of FIG. 18 only by the extension of the core 25 into a whole half-branch core 30. Not only the cutting process described above makes it possible to produce a given blank industrially at high speed, and in a precise and economical manner, but still it allows, from the same profile, to produce a whole range of blanks, which, for example, differ from each other only in the shape of the working head.
Ainsi, la Figure 20 représente un profilé 10G analogue à celui des Figures 14 et 15, et la Figure 21 montre qu'à partir de ce profilé, on peut découper soit une ébauche de membre de pince universelle 21A telle que celle de la Figure 18, soit une ébauche 21C de membre de pince coupante à bec rond. Bien entendu, on peut imaginer bien d'autres configurations d'ébauches réalisées à partir d'un même profilé de forme. L'outillage global permettant de fabriquer une gamme de pinces est par suite particulièrement économique.Thus, 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. 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.
La gestion d'un parc de profilés de forme peut même être totalement supprimée si l'on part d'un profilé de base à section simple dans lequel on réalise par forgeage, à froid ou à chaud, une succession de tronçons de profilé de forme dans chacun desquels s'inscrit une découpe, que l'on réalise dans une étape ultérieure.The management of a fleet of shaped profiles can even be completely eliminated if we start from a basic profile with a simple section in which a series of sections of shaped profile are produced by forging, cold or hot. in each of which is inscribed a cutout, which is produced in a later step.
Ainsi, dans l'exemple des Figures 22 et 23, on part d'un profilé de base ou feuillard 32 à section rectangulaire, dont l'épaisseur est l'épaisseur maximale à prévoir dans la découpe (à savoir l'épaisseur E du bec 24 dans les exemples cités ci-dessus) .Thus, in the example of Figures 22 and 23, we start from a basic section or strip 32 with rectangular section, the thickness of which is the maximum thickness to be provided in the cutout (namely the thickness E of the spout 24 in the examples cited above).
Ce profilé de base est forgé en plusieurs étapes (Figure 23) pour former une succession de tronçons de profilés de forme 10H dans chacun desquels s'inscrit une découpe 33, qui est par exemple celle de l'ébauche de demi-pince universelle 21D de la Figure 24.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.
Ainsi, à partir du profilé rectangulaire illustré en (a) , on effectue les étapes suivantes :Thus, from the rectangular profile illustrated in (a), the following steps are carried out:
(b) réalisation d'une découpe localisée 132, à peu près au centre d'un tronçon de profilé 232;(b) performing a localized cut 132, approximately in the center of a section of section 232;
- (c) forgeage localisé de cette découpe pour former le taillant 121 de l'ébauche;- (c) localized forging of this cut to form the cutting edge 121 of the blank;
- (d) forgeage de la partie 232A du tronçon de profilé située d'un côté de la découpe forgée 132, pour l'amener à l'épaisseur désirée pour les parties 22 et 25 de l'ébauche; on obtient ainsi un tronçon de profilé de forme 101; et- (d) forging the part 232A of the section of section located on one side of the forged cutout 132, to bring it to the desired thickness for the parts 22 and 25 of the blank; a section of form 101 is thus obtained; and
- (e) découpe de l'ébauche 21D à taillant 121 représentée à la Figure 24.- (e) cutting of the blank 21D with cutting edge 121 represented in FIG. 24.
Un tel procédé permet de supprimer la phase ultérieure d'usinage du taillant 121.Such a method eliminates the subsequent machining phase of the cutter 121.
De même, dans l'exemple des Figures 25 à 27, on part d'un profilé de base 32A à section circulaire (Figure 25), par exemple dévidé d'une bobine, et on réalise par forgeage une succession de tronçons de profilés de forme 101 (Figure 26) constitués chacun d'un tronçon 33 à section rectangulaire suivi d'un tronçon 34 à faces planes, de faible épaisseur. La découpe dans chaque tronçon 101 (Figure 27) donne naissance à un membre de pince, dans cet exemple un membre 21E de pince coupante. On remarque que dans cet exemple, la dimension longitudinale de l'ébauche 21E est sensiblement parallèle a la longueur du profilé. Les Figures 28 à 36 illustrent trois modes différents de finition d'une demi-pince à partir d'une ébauche de membre de pince 21F qui ne diffère de l'ébauche 21A de la Figure 18 que par la présence de reliefs 36, tels que des encoches et un orifice, sur le noyau de branche 25. Les reliefs 36 peuvent être obtenus par la découpe elle-même.Similarly, in the example of Figures 25 to 27, we start from a base section 32A with circular section (Figure 25), for example unwound from a coil, and a succession of sections of sections of form 101 (Figure 26) each consisting of a section 33 of rectangular section followed by a section 34 with flat faces, of small thickness. The cut in each section 101 (Figure 27) gives rise to a clamp member, in this example a member 21E of cutting pliers. Note that in this example, the longitudinal dimension of the blank 21E is substantially parallel to the length of the profile. 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.
L'ébauche ayant été usinée en 37 dans la zone active du bec 24, pour en constituer un membre de pince 39, dans l'exemple des Figures 28 et 29, la poignée 38 est simplement surmoulee sur le noyau 25. Cette poignée peut être en aluminium, en alliage d'aluminium, ou en matière thermoplastique ou thermodurcissable renforcée ou non .The blank having been machined at 37 in the active region of the spout 24, to form a clamp member 39, in the example of FIGS. 28 and 29, 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.
Dans la variante des Figures 30 et 31, on commence par enfiler a force, ou du moins a joint étanche, sur le noyau 25 une bague 40, puis on ferme le moule de surmoulage de la poignée sur cette bague . La demi-pmce finie est représentée sur la Figure 31. La bague 40 est constituée d'une matière présentant une certaine souplesse ou ductilité afin de s'adapter intérieurement aux variations di ensionnelles du noyau 25, et extérieurement au contour du moule fermé. Cette matière est par exemple une matière plastique ou de l'aluminium. La partie avant de la bague 40, extérieurement agrandie, est visible à l'avant de la poignée et prolonge celle-ci.In the variant of 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.
Comme représenté aux Figures 32 et 33, en variante, on peut effectuer sur la poignée 38 un second surmoulage 138, formant un revêtement total (Figure 32) ou partiel (Figure 33), en une matière relativement souple ou "gπp" . On peut ainsi obtenir toute une gamme de pinces à partir de la même poignée de base 38. Dans la variante des Figures 34 à 36, la poignée 38, en matière plastique, est réalisée indépendamment par moulage et comporte une cavité 41 qui débouche à son extrémité avant par une ouverture 42 et latéralement par une ouverture 43 (Figure 34) . Les parois de la cavité 41 présentent des reliefs 44. Le noyau 25 du membre de pince est introduit à travers l'ouverture 42 (Figure 35), puis de la matière plastique complémentaire 45 est surmoulée dans la cavité 41 pour solidariser les deux pièces (Figure 36). On peut bien entendu modifier la poignée de la même manière qu'aux Figures 32 et 33.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 "gπp". It is thus possible to obtain a whole range of pliers from the same base handle 38. In the variant of Figures 34 to 36, 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.
Dans chacune des variantes des Figures 28 à 36, les reliefs 36 du membre de pince, et éventuellement 44 de la poignée, améliorent l'adhérence entre les deux pièces après le surmoulage.In each of the variants of FIGS. 28 to 36, the reliefs 36 of the clamp member, and possibly 44 of the handle, improve the adhesion between the two parts after overmolding.
Il est à noter que les modes de finition de branche décrits ci-dessus en regard des Figures 28 à 36 sont également applicables à des membres métalliques obtenus par tout autre procédé approprié, par exemple par forgeage ou découpe/emboutissage de tôles planes.It should be noted that the 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.
De plus, on peut, dans le cas d'une poignée bi-mjectée, appliquer la technique décrite au sujet d'un manche de tournevis dans le FR-A-2 730 658 au nom de la Demanderesse, à savoir, lors de la dernière opération de surmoulage, fermer le moule en appliquant une nervure de pincement de celui-ci sur un gradin de la partie injectée sous-j acente . In addition, it is possible, in the case of a twin-handle, to apply the technique described with regard to a screwdriver handle in FR-A-2 730 658 in the name of the Applicant, namely, during the last overmolding operation, close the mold by applying a pinch rib thereof on a step of the underlying injected part.

Claims

REVENDICATIONS
1 - Procédé de fabrication d'ébauches (1; 21; 21A; ...; 21F; 29) de pièces métalliques de pinces comprenant une mâchoire, caractérisé en ce qu'on découpe le contour de chaque ébauche dans un tronçon de profilé de forme respectif (10; 10A; ...; 101) d'épaisseur variable dont la section correspond à au moins une section de l'ébauche.1 - Method for manufacturing blanks (1; 21; 21A; ...; 21F; 29) of metal pieces of pliers comprising a jaw, characterized in that the outline of each blank is cut from a section of profile respective shape (10; 10A; ...; 101) of variable thickness, the section of which corresponds to at least one section of the blank.
2 -Procédé suivant la revendication 1, caractérisé en ce que le tronçon de profilé de forme (10;2 -A method according to claim 1, characterized in that the section of shaped profile (10;
10A; ...; 101) est monobloc et monomatière.10A; ...; 101) is monobloc and single material.
3 - Procédé suivant la revendication 1 ou 2, caractérisé en ce que ' on réalise la découpe dans un profilé (10; 10A; ...; 10G) de section constante. 4 - Procédé suivant la revendication 1 ou 2 , caractérisé en ce qu'on part d'un profilé de base (32; 32A) ayant une section différente de celle des tronçons de profilé de forme (10H; 101) , on réalise à partir de ce profilé de base, par au moins une opération de forgeage, des tronçons localisés (10H; 101) de profilé de forme, et on réalise la découpe dans chacun de ces tronçons localisés.3 - Process according to claim 1 or 2, characterized in that 'the cutting is carried out in a profile (10; 10A; ...; 10G) of constant section. 4 - Method according to claim 1 or 2, characterized in that one starts from a base profile (32; 32A) having a section different from that of the sections of shaped profile (10H; 101), it is produced from of this base section, by at least one forging operation, localized sections (10H; 101) of shaped section, and cutting is carried out in each of these localized sections.
5 - Procédé suivant la revendication 4, caractérisé en ce que le profilé de base (32; 32A) est un feuillard ou une barre à section rectangulaire ou polygonale, ou un profilé à section en courbe fermée, en particulier circulaire, notamment dévidé d'une bobine.5 - Method according to claim 4, characterized in that the base profile (32; 32A) is a strip or a bar with rectangular or polygonal section, or a section with closed curve section, in particular circular, in particular unwound from a coil.
6 - Procédé suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que les tronçons de profilé de forme (10B; 10C; 10D; 10E; 10G; 10H; 101) présentent d'un côté, sur toute leur étendue, une face plane d'appui sur une matrice de découpage plane.6 - Method according to any one of claims 1 to 5, characterized in that the sections of shaped section (10B; 10C; 10D; 10E; 10G; 10H; 101) have on one side, over their entire extent, a flat face for bearing on a flat cutting die.
7 - Procédé suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que les tronçons de profilé de forme (10; 10A; ...; 101) comportent au moins une surface de changement d'épaisseur (8; 8A, 8B; 8C) inclinée, notamment à au moins 30°, par rapport à la perpendiculaire au plan médian (P) desdits tronçons.7 - Process according to any one of Claims 1 to 6, characterized in that the sections of shaped profile (10; 10A; ...; 101) comprise at least one thickness change surface (8; 8A, 8B; 8C) inclined, in particular at minus 30 °, with respect to the perpendicular to the median plane (P) of said sections.
8 - Procédé suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que les tronçons de profilé de forme (10) comportent au moins un épaulement (5) sensiblement perpendiculaire à leur plan médian (P) , la racine de cet épaulement étant notamment longée par une gorge de dégagement (6) .8 - Method according to any one of claims 1 to 7, characterized in that the sections of shaped section (10) comprise at least one shoulder (5) substantially perpendicular to their median plane (P), the root of this shoulder being in particular bordered by a release groove (6).
9 - Procédé suivant l'une quelconque des revendications 1 à 8, caractérisé en ce que la section des tronçons de profilé de forme (10D; 10C; 10D) est symétrique dans le sens transversal, et en ce qu'on y réalise par découpe des ébauches (21A) disposées tête- bêche .9 - Method according to any one of claims 1 to 8, characterized in that the section of the sections of shaped section (10D; 10C; 10D) is symmetrical in the transverse direction, and in that it is produced by cutting blanks (21A) arranged head to tail.
10 - Procédé suivant l'une quelconque des revendications 1 à 9, caractérisé en ce qu'on utilise les tronçons de profilé de forme (10G) pour y découper au moins deux ébauches de formes différentes (21A, 21C) .10 - Method according to any one of claims 1 to 9, characterized in that the sections of shaped profile (10G) are used to cut therein at least two blanks of different shapes (21A, 21C).
11 - Procédé suivant l'une quelconque des revendications 1 à 10, caractérisé en ce que la section du tronçon de profilé de forme (10; 10A; ...; 101) correspond à au moins une section dans l'ensemble longitudinale de l'ébauche.11 - Method according to any one of claims 1 to 10, characterized in that the section of the section of shaped section (10; 10A; ...; 101) corresponds to at least one section in the longitudinal assembly of l 'draft.
12 - Procédé de fabrication d'une demi-pince, caractérisé en ce qu'on réalise, suivant l'une quelconque des revendications 1 à 11, une ébauche (21F) qui comporte un noyau de branche de pince (25) , et on surmoule une poignée de pince (38) sur ce noyau.12 - A method of manufacturing a half clamp, characterized in that one realizes, according to any one of claims 1 to 11, a blank (21F) which comprises a clamp branch core (25), and one overmoulded a pliers handle (38) on this core.
13 - Procédé suivant la revendication 12, caractérisé en ce que le moule de surmoulage est fermé sur une bague d'adaptation (40) enfilée sur le noyau de branche (25 ) .13 - Method according to claim 12, characterized in that the overmolding mold is closed on an adapter ring (40) threaded on the branch core (25).
14 - Procédé de fabrication d'une demi- pince, caractérisé en ce qu'on réalise, suivant l'une quelconque des revendications 1 à 11, une ébauche (21F) qui comporte un noyau de branche de pince (25), on introduit avec jeu le noyau de branche (25) dans une cavité (41) d'une poignée préformée (38), et on remplit l'espace restant libre dans cette cavité d'une matière de remplissage (45) .14 - A method of manufacturing a half clamp, characterized in that one realizes, according to any one of claims 1 to 11, a blank (21F) which comprises a clamp branch core (25), one introduces with play the branch core (25) in a cavity (41) of a preformed handle (38), and the space remaining free in this cavity is filled with a filling material (45).
15 - Procédé selon la revendication 14, caractérisé en ce que la cavité (41) de la poignée préformée (38) débouche vers l'avant et latéralement.15 - Method according to claim 14, characterized in that the cavity (41) of the preformed handle (38) opens forward and laterally.
16 - Profilé de forme (10; 10A; ...; 10G) pour la mise en oeuvre d'un procédé suivant la revendication 3 ou l'une quelconque des revendications 6 à 15 lorsqu'elles dépendent de la revendication 3. 16 - Shaped profile (10; 10A; ...; 10G) for the implementation of a method according to claim 3 or any one of claims 6 to 15 when they depend on claim 3.
EP97943040A 1996-10-04 1997-10-01 Method for making blanks for parts of pliers Expired - Lifetime EP0935507B1 (en)

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

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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)

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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)

* Cited by examiner, † Cited by third party
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

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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
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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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