JPS6320498Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cutting type shear angle four-sided cutting blade device.

Cutting dies are provided with a shear angle to reduce machining force, reduce noise, and prevent breakthroughs, but in the case of mass production cutting dies, spare blades are required.
Conventionally, in the case of such a shear angle cutting type, it was difficult to make a four-sided cutting edge, so a spare blade was manufactured, but the manufacturing cost was high, and it was necessary to manufacture a front blade when using a spare blade. There were problems such as the need for clearance adjustment due to errors. It is also possible to machine the cutting edge joint of the holder into a shear square shape, but since the holder is large, it not only becomes difficult to perform large-scale machining, but also poses problems such as not being able to guarantee the accuracy of the shear square shape. be.

The present invention makes it possible to use the shear angled cutting edge on four sides by interposing a spacer with a specific shape between the cutting edge joint of the holder and the shear angled cutting edge. Another object of the present invention is to provide a cutting type shear angle four-sided cutting blade device that eliminates the need to adjust extraction clearance when the cutting blade is rotated.

Therefore, in the present invention, the front and back and top and bottom sides are formed symmetrically with respect to the horizontal center line, the left and right sides are formed symmetrically with respect to the vertical center line, and in addition, slopes that slope symmetrically from the center are formed on each of the top and bottom surfaces. A four-sided cutting blade is formed with cutting edges having shear angles at the upper and lower ends of both the front and rear surfaces, and one surface matches the upper and lower surfaces of the four-sided cutting blade, and the other opposing surface matches the cutting blade pressing surface of the holder. It is characterized by consisting of a spacer having a shape.

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

FIG. 1 is a partially sectional side view showing the device of the present invention attached to a holder of a press machine. In the figure, 1 is an upper holder and 2 is a lower holder, each of which is a joint part with a press machine. Reference numeral 3 designates a four-sided upper cutting edge with shear angles, which is formed symmetrically in front and back and up and down with respect to the horizontal centerline 14, and symmetrically in the left and right with respect to the vertical centerline 15, as shown in an enlarged view in FIG. ing. Further, the upper and lower surfaces each form a slope that is symmetrically inclined from the center. The upper and lower ends of both the front and rear surfaces serve as cutting edges. Reference numeral 4 denotes a spacer for insertion, and as shown in an enlarged view in FIG. 2, the upper surface has the same plane 8 as the cutting blade pressing surface of the upper holder 1 (see FIG. 1), and the lower surface has the cutting blade 3. Shape surface 9 that matches the upper and lower surfaces of
have. 5 is a lower cutting edge, 6 is a urethane stripper, and 7 is a guide for facilitating the flow of the coil.

FIG. 3 is a further enlarged sectional view of the upper cutting edge 3. In the figure, reference numeral 11 indicates a bolt hole for joining with the upper holder 1, which is arranged symmetrically with respect to the center of the upper cutting edge 3, as seen in FIG. Reference numeral 12 denotes a relief for areas other than the part where the cutting blade is used, and is provided in order to reduce the polishing area and to eliminate poor accuracy due to changes in the polishing area of the bolt hole 11 portion during polishing.

In this way, by combining the spacer 4 and the four-sided upper cutting edge 3 with shear angles, that is, by inserting the spacer 4 between the upper holder 1 and the upper cutting edge 3, the upper cutting edge 3 It is now possible to attach it to the upper holder 1 by rotating it up and down and left and right.
The four surfaces A, B, C, and D (see FIG. 3) of the upper cutting edge 3 can be used as cutting edges. Therefore, there is no need for a spare blade, and there is no need to adjust the extraction clearance between the sheared four-sided upper cutting blade 3 and the lower cutting blade 5 during rotational use.

Therefore, the present invention interposes a spacer between the joint surface of the cutting blade of the holder and the four-sided cutting blade with shear angles, one of which is in the same plane as the joint surface of the holder, and the other is aligned with the upper surface of the cutting blade. By doing so, it is possible to use four sides of the sheared cutting edge, there is no need for a spare blade, and there is no need to adjust the extraction clearance when using the rotating cutting blade.
The effects of this invention are extremely large.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
The figure is a partially cross-sectional side view showing the state installed in the holder of a press machine, Figure 2 is an enlarged front view seen from the X direction of Figure 1, and Figure 3 is the shear angle four-sided upper cutting edge of Figure 2. FIG. 2 is a further enlarged cross-sectional view. 1... Upper holder, 2... Lower holder, 3... Four-sided upper cutting edge with shear angle, 4... Spacer, 5... Lower cutting edge, 8... Upper plane of spacer, 9... Matches shear angle Lower shape surface of spacer, 10... Shear angle of upper cutting blade, 13... Upper holder cutting blade pressing surface,
14, 15...Center line.

Claims (1)

[Scope of utility model registration request] Formed symmetrically front to back and up and down with respect to the horizontal center line, and formed symmetrically left and right with respect to the vertical center line,
Furthermore, a four-sided cutting blade is formed on each of the upper and lower surfaces, with slopes slanting symmetrically from the center, and the upper and lower ends of both the front and rear surfaces are cutting blades having a shear angle, and one surface is on the upper and lower surfaces of the four-sided cutting blade, and a spacer whose other opposing surface has a shape that matches the cutting blade pressing surface of the holder.