JPS61202729A - Metal die for producing laminated fixing article - Google Patents

Abstract

PURPOSE:To increase the accuracy in a laminated fixing article by using that having a polygon flat part on the flange part with the inner diameter and outer diameter being not co-axial with the die button of the part to form embossed projection on a thin plate. CONSTITUTION:The die button 31 having polygon flat parts 13-1-13-6 on a flange part 13 with the inner diameter and outer diameter being not co-axial is assembled by fitting the eccentric direction to the reversing direction to the center slippage of the punch and die button instead of the conventional die button in case of the center slippage of (a) caused on a projection forming punch and die button. The polygon hole to accept this flange part 13 on the die plate is then provided.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a thin plate with stamped projections, and punches out the outer shape of the portion including the stamped out projections, and also forms individual thin plate pieces that are punched out in advance in an outer punching die. This invention relates to a mold for manufacturing a laminated fixed product by fitting a protrusion and a protrusion into a recess on the back surface of the protrusion and fixing both together.

Conventional technology In recent years, the precision of laminated and bonded products manufactured by the above method has been increasingly required to be high, and the accuracy of laminated and bonded products depends on how well the center of the unevenness of the punched protrusions formed on the thin plate is. It is no exaggeration to say that it depends on whether they are concentric.

Hereinafter, an example of a conventional mold for manufacturing a laminated fixed product will be described with reference to the drawings.

FIG. 2 is a side cross-sectional view of a tool portion of a conventional mold for manufacturing a laminated fixed product for forming punching protrusions on a thin plate.

In Fig. 2, 1 is a punch for forming a punched projection, 2 is a punch plate, 3 is a die button for forming a punched projection, 4 is a die plate, 5 is an ejector for ejecting the formed punching projection from the die button, 6 is a spring, and 7 is a This is the lower die set.

FIG. 3 is a side cross-sectional view of a state in which a stamped projection is formed on a thin plate using the configuration shown in FIG. 2, and 8 is a thin plate, and the other parts are the same as in FIG. 2.

FIG. 4 is a side cross-sectional view of a state in which the part including the punched-out projection is laminated and fixed together with the punched-out shape, in which 9 is a punched-out die, 10 is a punched-out punch, and 11 is a guide that prevents the punched-out projection from being pushed back; 8a, 8b, 8
c is a thin plate piece that has been previously punched into a die.

Problems to be Solved by the Invention However, the accuracy of a mold assembled into the configuration shown in Figure 2 is as low as 0.0% with current machine accuracy.
03 gates is possible, but there is still a limit to the overall accuracy after assembly, and a center shift as shown in a in FIG. 2 occurs between the forming punch 1 and the forming die button 3. If a stamped projection is formed on a thin plate in such a state, a center deviation will similarly occur on the concave and convex sides of the stamped projection, as shown in FIG. When the outer shape of the part including the punched-out protrusion where the center deviation has occurred is punched out, the fourth
In the state shown in the figure, the concave part on the back of the protrusion of the thin plate piece previously punched in the die and the center of the convex part of the protrusion to be punched next are misaligned, so the individual thin plate pieces do not fit together perfectly. is not carried out. This will degrade the precision of the assembled laminated and fixed product.

To adjust this, correct the position of the die button.

The position of the die plate is corrected in two steps, but this takes a lot of time.

Means for Solving the Problems In order to solve the above-mentioned problems, the mold for manufacturing laminated fixed products of the present invention has a cylindrical die button that faces a forming punch that forms protrusions on a thin plate, and has an inner diameter and an outer diameter. The diameter is eccentric,
This uses a flange with a polygonal flat part.

With the above-described configuration, when the center of the punch for forming a protrusion and the die button is misaligned by a as shown in FIG. The adjustment that used to take a lot of time is now possible by assembling it so that it is in the opposite direction to the center deviation direction of the punch and die button, and using a polygonal flat part machined on the flange to prevent it from turning. It can be carried out in a short time and allows for improved precision of laminated and fixed products.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a die button of a punched protrusion forming part according to the present invention. In FIG. 1, 31 is a die button whose inner and outer diameters are offset by a distance a, and 12 is a key for preventing rotation.

If a center deviation occurs between the punch and the die button for punching out the protrusion as shown in Fig. 2, use the die button 31 in Fig. 1 instead of the die button 3 in the opposite direction to the center deviation between the punch and the die button. Insert with the eccentric direction aligned. The rotation of the die button is prevented by flat parts 13-1 to 13-8 of the flange part 13 machined in eight directions in FIG. In this example, the eccentric die button can accommodate the amount and direction of center deviation in eight directions, greatly reducing the time required to center the forming punch and die button, and improving the accuracy of laminated and fixed products. be able to.

Effects of the Invention As described above, in the present invention, by using a die button where the punched projection is formed on a thin plate, the inner diameter and outer diameter are eccentric, and the flange part has a polygonal flat part.
What used to take a lot of time to center the protrusion forming punch and die button can now be adjusted in a short time, and the accuracy of laminated and fixed products can be improved.

[Brief explanation of the drawing]

Figure 1 & is a plan view of a die button for forming a protrusion formed by a mold for manufacturing a laminated fixed product according to an embodiment of the present invention, Figure 1 is a sectional view of the same side, and Figure 2 is a conventional one for manufacturing a laminated fixed product. Figure 3 is a cross-sectional view of the W side of the die for forming the punched protrusions, Figure 3 is a side cross-sectional view of the configuration of Figure 2 in which the punched protrusions are formed on a thin plate, and Figure 4 is a conventional die for manufacturing laminated fixed products. FIG. 6 is a side cross-sectional view of a state in which a portion including a protrusion is punched out and laminated and fixed. 31... Die button with eccentric inner and outer diameters and a polygonal flat part on the flange, 12... Detent key. 13-1 to 13-8...-Polygonal flat portions provided on the flange portions. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 (f

Claims (1)

[Claims] A forming punch for forming punched projections on a steel strip,
A cylindrical die button is provided corresponding to the forming punch in order to receive the punched-out projection, and an outline punch and die are provided to punch out the outer shape including the punched-out projection, and the die button of the part where the punched-out projection is formed is provided. , laminated fixing in which the inner diameter and outer diameter are eccentric, a flange is provided, the flange has a polygonal flat part, and a die plate is provided with a polygonal hole to receive the flange. Mold for manufacturing products.