JPH018376Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary marking punch, and more particularly to a rotary marking punch that is used by being attached to a punch holder such as a punch press.

Traditionally, when stamping the date of manufacture on the surface of a metal product, it is either done manually by punching each character with a letter punch or number punch, or by replanting the letters one by one in a holder. The method used was to stamp them all at once. However, as punching machines that use punch assemblies have become more widespread, for example, when it is necessary to write the manufacturing date on a product, it is possible to automate the process by incorporating it as one of the punch molds of the punching machine. This will bring great benefits in terms of labor savings. The present invention also provides a rotary marking punch that is incorporated as one of the punching assemblies as described above.

Preferred embodiments will be described in detail below with reference to the drawings.

In FIG. 1, 1 is a rotary marking punch. 3 is punch head, 5 is punch slide, 7
9 is a punch outer cylinder; 9 is a retainer ring fixed to the upper part of the punch outer cylinder; this ring regulates the upper limit of the shoulder of the punch slide 5; and a disc spring provided between it and the punch head 3. It also serves as a spring seat for the elastic member 11 such as.

Although not shown, there is a gap between the retainer ring 9 and the punch holder of the punch press.
Similar to a normal punch assembly, a lift spring is interposed so that the entire rotary marking punch 1 is floated away from the upper surface of the work except when stamping.

As best shown in FIG. 2, the lower end of the punch outer cylinder 7 has a deep square hole 13 in the center, shallow grooves 15 on both side walls of the square hole 13,
The stamping punch shaft 17 is fixed in the shallow groove from below.
A rotatable engraved ring 19 having characters or the like protruding from its outer periphery is provided in the deep square hole 13 described above. Furthermore, the stamping punch shaft 1 of the stamping ring 19
At the same time, a recess 21 is provided in the part touching the numeral 7 so that the center of the letters on the outer periphery coincides with each other, and a vertical hole 23 is provided at the lower end of the shaft, and a steel ball 27 equipped with a spring 25 is provided in the lower end of the shaft. A top mechanism is provided.

In addition, 29 is a guide groove in which the punch outer cylinder 7 is provided, and is for maintaining the direction of the punch outer cylinder.
31 is an air vent hole.

In this embodiment, five engraving rings 19 are shown, but of course the number is not limited to one or ten. However, when the number of rings is one or two, it is optional to act horizontally from the side of the ring. Although the engraving ring 19 has a regular dodecagonal outer circumferential surface, it can be applied to any polygonal surface if necessary, and even if the outer circumference itself is circular, in short, the characters to be engraved are formed on the punch outer cylinder 7. It goes without saying that it is sufficient if it protrudes further downward and is horizontal.

In the above configuration, each engraved ring 19
After selecting the appropriate rotation, when the punch head 3 is pressed with the ram of the punch press, the lift spring is first compressed, the punch outer cylinder 7 is lowered relative to the punch holder, and the marking ring 9 comes into contact with the upper surface of the workpiece. . Thereafter, as the ram further descends, the elastic member 11 is compressed and the workpiece is marked. At this time, even if the thickness of the workpiece changes variously, the elastic member 11 is compressed and the punch slide 5 descends relative to the punch outer cylinder 7, so that the thickness of the workpiece changes. The amount is absorbed.

As can be understood from the above description of the embodiments, in the present invention, characters or codes can be selected by rotating the engraving ring 19. Particularly, in the present invention, the punch outer cylinder 7 supporting the engraving ring 19 and the punch slide 5 are fitted to be vertically movable, and the elastic member 11 is disposed between the punch outer cylinder 7 and the punch slide 5. Because of the interposed structure, when the punch slide 5 is pressed by the ram of the punch press, the punch outer cylinder 7 is pressed down via the elastic member 11, and the corresponding character or code of the marking ring 19 is stamped on the material. It is something. At this time, if the thickness of the materials differs, the elastic member 11 is compressed and the punch slide 5 descends relative to the punch outer cylinder 7, which can accommodate changes in the thickness of the materials. be. In other words, even if the thickness of the material changes, damage to the marking ring 19 etc. can be prevented without any excessive force acting on it.

[Brief explanation of the drawing]

Figure 1 is a central sectional view of the stamping die of this stamping die, parallel to the ring surface. FIG. 2 is a view of the lower end surface of the main stamping mold in the direction of the − arrow shown in FIG.
The figure is a view taken along the - arrow in FIG. FIG. 4 is an explanatory diagram showing a stamping tip, a ring, and a stamping punch shaft for explaining the click stop mechanism. Explanation of the symbols representing the main parts of the drawing, 1...Rotary marking punch, 5...Punch slide, 7...
Punch outer cylinder, 11... elastic member, 17... engraved punch shaft, 19... engraved ring.

Claims (1)

[Scope of utility model registration request] Engraved punch shaft 1 fixed to the lower part of punch outer cylinder 7
7 is provided with an appropriate number of stamping rings 19 having a plurality of letters or codes protruding from the outer circumferential surface, rotatably supported, and fitted into the upper part of the punch outer cylinder 7 so as to be vertically movable. 5 and punch outer cylinder 7
A stamping die for a punch press, characterized in that an elastic member 11 is interposed between the punch slide 5 and the elastic member 11 for urging the punch slide 5 upward.