Classifications

• • 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
  • B21G3/16—Pointing; with or without cutting
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
  • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending

Definitions

• the invention relates to a method for producing a tip in a contact pin according to the preamble of claim 1 and a tool for carrying out the method.
• the tip is produced by molding four surfaces, but the surfaces of the tip are irregularly shaped and, moreover, their edges are not free of burrs. It is also known to form the tips by means of an electromechanical method, but this results in crowned tips. Here, current flows through the pen, which heats up and is pulled at the same time until it tears.
• the object is to design the method in such a way that multi-surface, regularly shaped and burr-free tips result.
• Figures 1 and 2 a side view and a section through the pin after the first deformation process with an illustration of the stamp used;
• Figures 3 and 4 a side view and a section after the second deformation process
• Figures 5 and 6 a side view and a section after the third deformation process
• FIGS. 7 and 8 a side view and a section after the fourth deformation process
• Figures 9 and 10 a 39ans cht and a section after the fifth deformation process with a
• F guren 11 and 12 a 39ans cht and a cut after the sixth deformation process
• Figures 13 and 14 front views of the tools for pens made of square and round wire.
• the pin 1 has a quadratic cross section of, for example, 1 mm edge length. It is gradually deformed gradually to form the tip of two four stamps 2.
• the stamps 2K and 2F are actuated alternately.
• the eight stamps 2 are arranged offset by 45 from one another.
• Each punch has two wedge surfaces 3A, 3B, which are frusto-conical g to one another.
• the cutting line of the wedge surfaces 3A, 3B forms a wedge surface edge 4.
• the wedge surfaces 3A, 3B and thus also the wedge surface edge 4 of adjacent punches 2 each extend by 45 to one another, so that at each point on the wedge surfaces 3A, 3B the imaginary cutting edges of Cuts across the pin axis 5 lie on tangents of imaginary circles around the pin axis 5.
• each stamp has a truncated pyramid-like appearance, formed by the surfaces 3A and 3B as well as 6A and 6B.
• the punches 2K act diagonally on the edges 7 of the pin 1.
• the wedge surfaces 13A, 13B are generated on the pin, which intersect at the wedge surface edge 14A, and the inclined surfaces 16A and 16B.
• the wedge surfaces 13A, 13B, seen from the wedge surface edge 14A, run at an obtuse angle in opposite directions, while the inclined surfaces 16A and 16B in the region of the wedge surface edge 4 adjoin these wedge surfaces in a helical shape. Seen in cross section, the surfaces run 16A, 16B at 45 to the wedge surface edge 14A.
• the four stamps 2K which are to be referred to as edge stamps
• the four stamps 2F which are to be referred to as surface stamps
• the pin is now subjected to a second deformation process, with which the wedge surfaces 13C, 13D are produced. These intersect along the wedge surface edge 14B and are laterally delimited by the inclined surfaces 16C and 16D.
• the alternating wedge surface edges 14A, 14B thus form an octagon according to FIG. 4.
• the punches 2F are then brought into their starting position.
• the pin 1 is now subjected to a third deformation with the four edge punches 2K.
• This deformation step according to FIGS. 5 and 6 corresponds to that according to FIG. 1, so that the wedge surfaces 13E and 13F are produced which intersect along the wedge edge 14C.
• the wedge surfaces 13E and 13F are delimited by the inclined surfaces 16E and 16F.
• the pin 1 is now subjected to a fourth deformation with the four surface punches 2F, which corresponds to the second deformation step, so that the wedge surfaces 13G and 13H now arise.
• the wedge surfaces 13E and 13G alternate with one another, while the other tip area is formed by the alternating wedge surfaces 13F and 13H.
• the pin has the cross section of a regular octagon along the mutually alternating edge edges 14C and 14D.
• the pin 1 is now further deformed by the punches 2K in accordance with FIGS. 9 and 10, so that a first tip half is formed from the wedge surfaces 131 and a second tip half is produced from the wedge surfaces 13K, eight wedge surfaces each being present.
• the pin line has an incomplete octagonal cross section.
• the punches 2K are guided against one another to such an extent that adjacent inclined surfaces 6A, 6B touch one another.
• the pin is ultimately subjected to a sixth deformation by the surface stamp 2F, as shown in FIGS. 11 and 12.
• the punches 2F are moved together as far as illustrated with reference to FIGS. 9 and 10.
• the wedge surfaces 13L are produced on one tip half and 13M on the other tip half.
• One tip half is thus formed by the alternating wedge surfaces 131 and 13L, while the other tip half is formed by the wedge surfaces 13K and 13M.
• the pin 1 has an octagonal cross section. In the area of the wedge edge 14G, 14F, the pin breaks apart in two halves.
• the method can also be carried out with four punches 2K or 2F, the pin then being turned by 45 after each deformation operation.
• the pin 1 can also have a round cross section of 1 mm, for example, and is then gradually deformed as described above.
• stamps are used, which are arranged offset by 45 to one another.
• the punches 2K and 2F, each offset by 90 from one another, are actuated alternately.
• the stamp arrangement can also be carried out in accordance with FIG.
• the stamps 2K and 2F alternate.
• the stamps 2K and 2F are actuated alternately.
• the inclined surfaces 6A and 6B run parallel to one another at a distance which approximately corresponds to the radius of the wire used for producing the tip.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Forging (AREA)
• Wire Bonding (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6410591

Family Applications (1)

Country Status (4)

Families Citing this family (4)

Family Cites Families (7)

• 1990
  • 1990-07-19 DE DE4022965A patent/DE4022965C1/de not_active Expired - Fee Related
• 1991
  • 1991-07-18 WO PCT/EP1991/001354 patent/WO1992002060A1/de not_active Application Discontinuation
  • 1991-07-18 JP JP3178310A patent/JPH04231130A/ja active Pending
  • 1991-07-18 EP EP91913012A patent/EP0491919A1/de not_active Withdrawn

Non-Patent Citations (1)

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