JP2007015150A - Metal stamping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal stamping device which can dispense with a dedicated actuator for moving a stamping punch straight and can realize the simplification of facilities and the reduction of investment in them. <P>SOLUTION: This metal stamping device comprises the following members: (1) the stamping punch 3 fixed to a head 2, (2) guide rods 4 fixed coaxially to the head 2 on both sides of the stamping punch 3, (3) a guide member 6 of the stamping punch 4 through which the stamping punch 3 and the guide rods 4 pierce, (4) a spring 7 which is interposed between the head 2 and the guide member 6 and press-urges the guide member 6 so as to allow the guide member 6 to come into contact with a stopper 5 at the tip of the guide rods 4, and (5) a die 8 corresponding with the stamping punch 3. In operating the device, the guide member 6 is fixed to an arm of a clamping device for positioning a workpiece, then a workpiece supporting member of the clamping device is made to support the die 8, and the head 2 and the die 8 are inserted between electrode tips of a spot welding gun. Thus, the workpiece supported by the clamping device is stamped by a pressurizing force of the spot welding gun. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a take-in stamping device for marking an article to be stamped, such as a vehicle chassis number, a motor model, identification of parts, production lot number, and the like.

  The car chassis number, prime mover model, parts identification, manufacturing lot number, etc. are stamped and displayed on the workpiece. In particular, for the chassis number, the format of stamped letters, etc. is stipulated by the laws and international organizations of each country, and it is extremely important for registration of automobiles, inspection at the time of import / export, and identification of stolen vehicles. is there. Car manufacturers therefore have strict operational standards for the quality of their stamps. Conventionally, the car chassis number, the motor model, the stamp for displaying the identification or manufacturing lot number, the stamp for that purpose, and the like are conventionally called “takin”.

  A conventional take-in stamping apparatus includes a stamping punch, a stamping unit that supports the stamping punch, a drive unit that has a servomotor and linearly moves the stamping unit by the rotational movement of the servomotor, A servo motor control device for controlling the servo motor, wherein the servo motor control device controls a command current value for rotating the servo motor at a constant speed at a predetermined speed, and a reaction force acts on the stamping punch. The increase in the command current value caused by the detection is detected as the contact when the marking punch contacts the surface of the workpiece, and the servo motor is further rotated to a predetermined rotation angle from the contact to There is provided a device in which a straight line is moved by a predetermined distance from the position at the time of increase.

However, the take-in stamping device having the above structure is expensive and heavy because the servo motor is an actuator that linearly moves the stamp punch. There is a problem that a cylinder for positioning the workpiece by transferring it to the workpiece also becomes large.
JP 2002-160437 A

  In view of the above, an object of the present invention is to provide a take-in stamping apparatus that eliminates the need for a dedicated actuator for linearly moving a stamp punch and simplifies equipment and reduces investment.

  In order to achieve this object, according to the present invention, a marking punch fixed to the head in a vertical axial direction, and an axial direction parallel to the marking punch on both sides of the marking punch, A fixed guide rod, a guide member of the stamp punch that passes through the stamp punch and the guide rod, and a pressure member that is interposed between the head and the guide member and presses against the stopper at the tip of the guide rod. The head includes a biasing spring and a die corresponding to the engraving punch, the guide member is fixed to a clamp arm of a work assembly jig, the die is supported by a work support member of the work assembly jig, and the head The die is sandwiched between the electrode tips of the spot welding gun and the workpiece supported by the workpiece assembling jig is stamped with the pressure of the spot welding gun. It is characterized by doing so.

  According to a second aspect of the present invention, in the take-in stamping apparatus according to the first aspect of the present invention, the upper surface of the head and the lower surface of the die are provided with tapered grooves that contact the electrode tips of the spot welding gun.

  According to the present invention, the stamping device is equipped with a workpiece assembling jig and engraved with a spot welding gun for spot welding the workpiece on the workpiece assembling jig. This eliminates the need for a dedicated actuator to be moved, and has the effect of simplifying equipment and reducing investment.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In FIG. 1, 1 shows the take-in stamping apparatus of this invention. The marking stamping device 1 includes a marking punch 3 fixed to the head 2 in the vertical axis direction, and a guide rod 4 fixed to the head 2 in an axial direction parallel to the marking punch 3 on both sides of the marking punch 3. A guide member 6 of the stamping punch 3 that passes through the stamping punch 3 and the guide rod 4, and is inserted between the guide rod 4 and the head 2 and the guide member 6. The guide member 6 is inserted into the guide rod 4. And a die 7 corresponding to the stamping punch 3.

  In addition, a taper groove 9 for contacting the electrode tip of the spot welding gun on the upper surface of the head 2 and a taper groove 10 for contacting the electrode tip of the spot welding gun on the lower surface of the die 8 are provided.

  As shown in FIGS. 3 and 4, the take-in stamping apparatus 1 uses, for example, a work assembly jig 13 installed in an assembly line of a hood of an automobile, and guides the guide member 6 on the clamp arm 14. , The head 2, the stamping punch 3 and the guide rod 4 and the guide member 6 are mounted so as to be relatively movable, and the die 8 is supported by the work support member 16 of the work assembly jig 13.

  As shown in FIG. 3, the workpiece assembly jig 13 is attached to the workpiece W (for example, a hood of an automobile) in a state where the clamp arm 14 of the workpiece assembly jig 13 equipped with the take-in stamping device 1 is pivoted upward. As shown in FIG. 4, the clamp arm 14 is rotated until it is regulated by the sizing stopper 15 to clamp the workpiece W, and the take-in stamping device 1 is also connected to the workpiece. It is transferred in the direction of W.

  In the operation process of spot welding the workpiece W by the robot equipped with the spot welding gun 17 in such a state, the movable electrode tip 11 of the spot welding gun 17 is brought into contact with the upper surface of the head 2 as shown in FIG. The 17 fixed electrode tips 12 are brought into contact with the lower surface of the die 8 and are stamped on the workpiece W by the stamping punch 3 when the movable electrode tip 11 is pressed.

  At this time, the spot welding gun 17 is in a state where the energization is stopped. When the movable electrode tip 11 pressurizes the head 2, the stamping punch 3 moves relative to the guide member 6 fixed to the clamp arm 14, and the spring 7 is moved. The workpiece is compressed and stamped on the workpiece W on the die 8.

  The depth of stamping on the workpiece W is increased by increasing the gun pressing force of the spot welding gun 17, and is decreased by decreasing the gun pressing force. The pressure of the spot welding gun 17 is changed several times to try and set to a gun pressing force with an appropriate stamping depth.

  In addition, by providing the taper groove 9 with which the movable electrode chip 11 abuts on the upper surface of the head 2 and the taper groove 10 with which the fixed electrode chip 12 abuts on the lower surface of the die 8, the taper groove can be obtained even if the fit of the electrode chip deteriorates. 9 and 10 are copied, and the applied pressure of the spot welding gun 17 can be reliably transmitted to the stamping punch 3.

Front view of take-in stamping device according to the present invention Front view of stamping state of take-in stamping device Side view showing a state in which the take-in stamping device is mounted on the workpiece assembly jig Side view of the state where the take-in stamping device is transferred to the workpiece Side view of stamped state with spot welding gun

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Marking machine 2 Head 3 Marking punch 4 Guide rod 5 Stopper 6 Guide member 7 Spring 8 Die 9 Tapered groove 10 Tapered groove 11 Movable electrode tip 12 Fixed electrode tip 13 Work assembly jig 14 Clamp arm 15 Fixed size stopper 16 Workpiece Support member 17 Spot welding gun

Claims (2)

A stamp punch fixed to the head in the vertical axis direction, a guide rod fixed to the head in an axial direction parallel to the stamp punch on both sides of the stamp punch, and a guide of the stamp punch penetrating the stamp punch and the guide rod The guide member comprises a member, a spring interposed between the head and the guide member and pressing and urging the guide member to abut against a stopper at the tip of the guide rod, and a die corresponding to the marking punch Is fixed to the clamp arm of the workpiece assembly jig, the die is supported by the workpiece support member of the workpiece assembly jig, the head and the die are sandwiched between the electrode tips of the spot welding gun, and the workpiece is assembled with the pressure of the spot welding gun. The take-in stamping device is characterized in that the workpiece supported by the jig is stamped. The take-in stamping device according to claim 1, wherein a taper groove with which an electrode tip of a spot welding gun abuts is provided on the upper surface of the head and the lower surface of the die.

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