KR930004348Y1 - Cutter - Google Patents

Abstract

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Description

Cylindrical material cutting device using press

1 is a perspective view of the present invention.

2 is an exploded perspective view showing a state in which a movable mold holder is installed in the fixed mold holder;

3 is an exploded perspective view of a mold installed in a movable mold holder.

4 is an exploded perspective view of the brake and the auxiliary mandrel inserted into the material.

5a, 5b, 5c is a cross-sectional view of the main portion showing the operating state of the present invention.

6A and 6B are perspective views showing another example of the brake.

7 is a perspective view of a reel shaft product manufactured by the present invention.

* Explanation of symbols for main parts of the drawings

1: fixed holder 2: fixed mold

4: material 5: mobile holder

6: cutting mold 11: pressure holding

12 mandrel 13 hitting pin

15: braking port 16: bullet shot

17: spring 18: auxiliary mandrel

The present invention is to cut the piped material into the cutting mold of the press machine to make cylindrical products such as reel shafts used in video tapes, etc. The present invention relates to a device designed to reduce cost and improve external competitiveness by enabling mass production of high quality reel shafts and the like.

In general, when a cylindrical material made of pipe is cut with a press, the material is pressed and cut, so the cutting part is crushed and the cutting surface is irregularly cut, so the press machine could not manufacture an electronic component requiring precision such as a reel shaft. Therefore, conventionally, the cylindrical material was cut and manufactured by boring cutting one by one. The cutting speed was very late, so that mass production was not possible, and thus the manufacturing cost was high, resulting in weak external hardwood power.

The present invention was conceived in order to continuously cut a cylindrical material in a cutting surface cleanly and uniformly at a high speed in view of such a point, and will be described in detail with reference to the accompanying drawings.

The molding hole of the cutting mold 6 in which the pipe material 4 is installed on the front surface of the moving holder 5 through the molding hole 3 of the fixed mold 2 installed on the front wall of the fixed holder 1. 7) The cutting mold (6) in which the moving holder (5) shot by the punch (9) of the press (8) into the spring (10) is lifted and lowered to cut the entered material (4). In the huni of the rod 12, the tip 12a of the core rod 12 is held in the moving hole (5) so as to fit to the front of the molding hole (7), but the blow pin of the same inner and outer diameter as the material (4) ( 13) is inserted into the core rod 12 and installed to move by the compressed air injected into the space portion 14, and the inside of the distal end of the entering material (4) is formed by the bullet piece (16) In the figure, reference numeral 19 denotes a reinforcement for protecting the upper part of the cutting mold 6, by inserting the copper ball 15, the spring 17, and the auxiliary core 18 in order. (20) is a discharge hole formed under the fixed mold (2) of the fixed holder (1), (21) is a discharge guide tube, (22) is a product container, (23) (24) is a material (4) ) Is a vertical roller for conveying), (25) is a striking rod of the punch (9), (26) is a hose for injecting compressed air into the space portion 14 of the moving holder (5), (28) Is the cut surface of the cut product 27.

This proposal is to increase the effect of cutting by using a cemented carbide material of the stationary mold (2), cutting mold (6) and core rod (12), auxiliary core rod (18), reinforcing piece (19). The continuous cut is described as follows.

A cylindrical material 4, which is inserted and rotated between the upper and lower rollers 23 and 24, which is rotated, passes through the forming hole 3 of the stationary mold 2 and enters the forming hole 7 of the cutting mold 6. When the blow pin 13, which has one end inserted between the molding hole 7 and the core rod 12 as the inner and outer diameters of the material 4, is pushed back by the material 4 to be pushed in and reaches the pressure holding member 11, Since the auxiliary mandrel 18, which was inserted into the tip end of the work piece 4, is stopped by hitting the tip 12a of the mandrel 12 in the cutting mold 6, only the work piece 4 is shown in FIG. Likewise, the blow pin 13 enters the molding hole 7 of the cutting mold 6 by the length of the reverse.

However, at this time, the braking hole 15 fitted inside the material 4 is formed by cutting the cutting mold 6 since the material 4 is strongly pressed against the inner wall of the material 4 by the rear elastic ball piece 16. While only moderately pushed into the ball (7), the spring 17 is effectively supported so that the auxiliary mandrel 18 is tightly attached to the tip 12a of the mandrel 12.

After this, when the perch 9 of the press 8 hits the striking rod 25, the movable holder 5 descends while compressing the spring 10, as shown in FIG. 5b. The cutting mold 6 is lowered from the cutting mold 6 to cut the raw material 4. In this case, the auxiliary core is substantially equal to the inner diameter of the raw material 4 inside the raw material 4 located in the forming hole 3 of the stationary mold 2. In the state where the rod 18 is inserted and the core rod 12 substantially equal to the inner diameter of the raw material 4 is inserted in the raw material 4 located in the forming hole 7 of the cutting mold 6. Since the cut portion of the material (4) is cut without being crushed is cut surface 28 of the cut product 27 is horizontally very clean uniform.

Then, when compressed air is injected into the space portion 14 through the hose 26 in the state of FIG. 5B, the pressing pin 11 is fixed inside the moving holder 5 which is tightened with the wrench bowl, so that only the hitting pin 13 is provided. As shown in FIG. 15C, the product 27 is rapidly advanced to hit the product 27 cut into the molding hole 7 of the cutting mold 6. Thus, the cut product 27 is moved by the moving holder 5. As it is lowered, it falls down to the product container 22 through the discharge hole 20 of the fixed holder (1) that is matched with the molding hole (7).

After this, when the punch 9 of the press machine 8 rises, the moving holder 5 quickly rises due to the elastic force of the compressed spring 10, and the striking pin 13 is advanced as shown in FIG. 5d. In the state in which the core rod tip 12a in the molding hole 7 is in contact with the auxiliary core rod 18 inside the material 4 inserted into the molding hole 30 of the stationary mold 2 again. Accordingly, the material 4 is able to enter the molding hole 7 of the cutting mold 5 again while pushing the blow pin 13 having the same inner and outer diameters, thereby repeatedly cutting the material 4. Will be done.

And this invention devises the rear end of the braking hole 15 as shown in Figure 6a in addition to- It is also possible to form a bullet-shaped piece 16 cut into a shape, and the brake opening 15 itself has a ballistic braking force as shown in FIG. It can be done with a braking piece with a leaf spring of the form "."

In this way, the fixed mold 20 and the cutting mold 6 cuts the material 4 at a very high speed by the press machine 8, while the inner side of the cut portion of the material 4 is made of cemented carbide rods ( 12) and the auxiliary mandrel (18) are continuously supported effectively, so that the cutting surface 28 is very unevenly cut without distorting the pipe material 4, thereby producing a high quality product 27 in large quantities. As it can be made, it is possible to achieve a significant cost reduction, so that the external competitiveness is very high, and this invention can be used to manufacture all industrial parts used by cutting cylindrical materials in addition to the reel shaft for tape.

Claims (3)

The molding hole of the cutting mold 6 in which the pipe material 4 is installed on the front surface of the moving holder 5 through the forming hole 3 of the fixed mold 2 installed on the front wall of the fixed holder 1. 7) The cutting mold (6) in which the moving holder (5) shot by the punch (9) of the press (8) into the spring (10) is moved up and down to cut the entered material (4). At the rear end, the tip 12a of the core 12, which is held in the site 11, is installed in the moving holder 5 so that the tip 12a of the core 12 is fitted to the front of the molding hole 7, but a blow pin having the same inner and outer diameters as the material 4 (13) is inserted into the core rod 12 and installed to move by the compressed air injected into the space portion 14, and the inside of the front end of the entering material (4) is cut off and formed into a bullet piece (16) Cutting device of the cylindrical material using a press machine, characterized in that the braking hole 15, the spring 17 and the auxiliary core bar (18) 0 is inserted in sequence. The trailing end of the brake port 15 according to claim 1 Cylindrical material cutting device using a press machine, characterized in that formed by the elastic force (16) cut into a shape. The brake port 15 according to claim 1 Apparatus for cutting cylindrical material using a press, characterized in that formed by a braking hole made of a '' plate spring.