JPS58185721A - Die - Google Patents

Abstract

PURPOSE:To provide a die which has excellent resistance to abrasion and breakdown, is inexpensive and has a long life by irradiating a beam having high energy density to a fillet part and a blade part, thereby forming a hardened layer. CONSTITUTION:A beam having high energy density such as laser light condensed with a condensing lens to form a luminous flux is irradiated to the fillet part where the sectional area is changed sharply and stress are concentrated, and to the blade part in direct contact with a material to be worked to harden these parts locally and to form a hardened layer, in heat treated parts 2a, 2b, in a round shaped blanking punch 1 as a die. The parts irradiated with said beam are affected by heat only slightly and are quickly cooled by the material in the circumference of the heated parts, whereby said parts are hardened easily. Substantial hardness required as a die is obtained from inexpensive structural carbon steel for machine as well and the practically useful die having a long life is produced inexpensively with the simple working process.

Description

[Detailed description of the invention] [Technology of the invention minute hand] Book ik! A relates to a punching die C, which is conveniently used in press working.

[Prior art]

゛ In order to mass produce various mechanical elements (2. Use of coiled materials, short materials, sketch materials, etc. (2. Pressing methods such as punching, curved processing, and deep drawing are popular) It's crowded.

The punching and cutting tools used in these various press processes are all model numbers 1 and 62, similar to the processing tools used in general machining methods, and their lifespan is 1.

What is the analogy for this 9th S22? As for the J-cutting mold, a metal mold made from alloy tool steel or cemented carbide material, which has excellent abrasion resistance, is generally widely used. Therefore, gold t
M! is inevitably tetravalent, and accounts for a large proportion of the total manufacturing cost of pressed products.

Considering these circumstances, we have developed IIk Energy@Wrinkled Beam, with the aim of providing an inexpensive gold product.
For example, a method has been proposed in which a metal blade is manufactured by quenching and saponifying only the corner portion of the metal blade, without using a laser beam. (Jitsue 55-2159, Sojo 55-242
1) These Methods 4 and 2 can be made of fl-1''J as long as the copper material is generally hardenable as a tool class I.

Alloy worker A @ ij, as well as the cheap and hateful machine Sakakizo 114 (
For example, 5c450 etc.) can obtain the required hardness of 4000.However, in the punching process, due to the special purchase of punching and punching, a so-called breakthrough phenomenon inevitably occurs. A large impact stress is generated at corners in the mold or at areas where the cross-sectional area suddenly changes. FIG. 1 shows an example in which the inventor analyzed the stress state inside the tool during punching, targeting a round punch that is one of the gold salt products. As can be seen, the punch fillet 1tsA (two large opening stresses are generated).

Of course, the above-mentioned phenomenon occurs not only with round punches but also with general punching metals.
For this reason, gold Ijii suffers large-scale fractures caused by fatigue fractures at parts where the angle s or cross-sectional area suddenly changes, that is, stress concentration parts, and the life of ordinary products is exhausted. Therefore, in order to obtain a metal product with a practically sufficient machining area, it is insufficient to harden only the blade part that comes into direct contact with the AA workpiece material; It is necessary to increase the fatigue strength of the wrinkles in the concentrated part H [
[Object of the Invention] Therefore, the object of the invention is to provide a gilt bronze that is inexpensive and has excellent durability and durability.

[Am) of the invention] tkti and the blade part are irradiated with a low-energy yellowing beam, and a percentage value is increased at the point where a heat-reduced layer is formed.

[Embodiments of the invention]

An embodiment of the present invention will now be described with reference to FIG. 3. As is well known, one example is laser light 1-1. energy! I
t is non-electric r-4h < (approximately 1x to W/cj)
, -to luminous flux can be adjusted freely with a condenser lens.

Therefore, when the laser beam is irradiated on the participating workpiece C2, the thermal radiation will cause the ridge small range hI in the vicinity of the processed part of the cloudy processed material.
= stays, and the material around the machined part is used for cooling r1, so the process i'! is rapidly cooled and hardened by quenching. For this reason, it is possible to heat the base material without the need for a Gobo, such as the Kakuro-soso of Kamekirōgai, which is the quenching method for Kenmai, and the use of coolants such as water and oil. It is possible to quench and harden only the part.

Here, the materials to be heat-treated include steel materials that can be generally quenched, regardless of the 11 pieces of the material, alloy tool steel, and raw steel for low-friction machine building. Enough stiffness required is performed.

Here, as the conspicuous 9% mold in the part cured by the laser beam mentioned above, pressure leakage stress is generated in the cured ml, so the negative tension stress feeling = fatigue strength increases steadily. The following points can be mentioned. Figure 812 shows R wooden steel 820 for Shinkai Seizo, which controls the notch where stress concentration occurs.
Notch I of a tensile test piece consisting of 0! This figure shows the results of examining the fatigue strength of a piece of material whose bottom was locally sea-quenched and saponified using a laser beam, and subjected to a oscillating tensile load C2. As is clear from the 1 ml sample, the local hardening effect of the laser beam C2 is clear, and the fatigue strength is significantly improved compared to the unheated material.

Figure 3 shows a round punch with a small punching diameter. According to experimental results, this punch was able to continue processing without producing any #4 wealth even after 2000 liters of processing. The mechanical stress east part of the sea bream where stress occurs is the fi-rich corner and the part where the cross-sectional area changes suddenly, but by utilizing the numerical analysis of Ichika Capital Dentatsuo, we were able to determine its final birth. It is possible to know the response, etc.

〔Effect of the invention〕

As described above, according to the present invention, a beam having a high energy density is irradiated to the blade part and the stress concentration area where stress occurs to locally C: quench harden. Electricity required for heat treatment work
*-Two heating operations, quenching with water, oil, etc. 1 surface 4
2. Removal of generated scale and correction of heat treatment distortion can be omitted, the work process is simplified, and it is possible to manufacture practical molds that are inexpensive and have a long tool life, reducing product costs. This has the great effect of making it possible to achieve this.

4. Figure 1 is an explanatory diagram showing the results of analysis of the stress state generated in the fillet part of the punching bonner, which is one phase of punching aftershock, and Figure 2 is a diagram showing the results of a tensile test hardened with laser light. FIG. 3 is a curve diagram showing the results of v4 eating of steel frame ankylosis in the oscillation tensile test of the isthmus piece, and FIG.

1... rJ punch 2a, 2b... heat treatment section (
7317) Agent Patent Attorney Noriyuki Chika <th or 1 person) Figure 1 Time and (μJet)

Claims (2)

[Claims] (1) In a mold with a fillet formed on the base, s
61. A sparrow wrinkle whose percentage image is that a hardened layer is formed by irradiating the fillet part and the blade part with a beam having high energy density. (2) The mold according to item 1 of the scope of the patent application, characterized in that the base is bound with mechanical structural charcoal: IA@.