JPS6110890Y2 - - Google Patents

Description

[Detailed description of the invention] A serration block is used to efficiently finish, for example, the end face of a pipe used in the manufacture of a hydraulic shock absorber or the like. In other words, the material pipe is moved at a predetermined pitch and is successively opposed to an end face roughing machine, finishing machine, etc. By installing a pipe end cutter in such a serration block, machining can be made more efficiently, but in this case, unlike machining, the cut pieces are large and it is difficult to remove them. be. The present invention provides a guide tube for cut pieces inside the cutting machine and rotates the guide tube together with the cutting blade, thereby making it possible to easily remove the cut pieces.

FIG. 1 is a plan view of the serration block, in which pipes 1, 1, . The pipe transferred to a predetermined position is pushed and fixed by a ram 3, and a cutting machine 4, a roughing machine 5, a finishing machine 6, etc. are arranged so as to face both ends of the pipe 1. These machines move in the direction of arrow b and are driven by pulleys 7 to sequentially perform predetermined processing on the ends of the pipes. FIG. 2 is a partial cross-sectional view of the end of the pipe 1 being cut by the cutting machine 4, and FIG. 3 is a cross-sectional view taken along line A-A in FIG. A rotating body 10 is supported by the rotary body, and a pulley 7 shown in FIG. 1 is attached to this rotating body. Three disk-shaped cutting blades 11 arranged on one circumference around the axis of the rotating body 10 are rotatably attached to the rotating body 10, respectively. The mounting base 12 of the cutting blade 11 is attached to a hydraulic drive mechanism 14 along a guide groove 13 radially formed on the end surface of the rotating body 10.
It is configured to simultaneously move in the radial direction. Furthermore, a guide tube 15 is attached on the axis of the rotary body 10 so as to rotate together with the rotary body, and three protrusions 16 formed at the tip of the guide tube 15 are inserted into the gaps between the three cutting blades 11. Moreover, the tail end is made to protrude from the center of the pulley 7 as shown in FIG.

When cutting the end of the pipe 1 with the above-mentioned cutting machine 4, move it as shown by the arrow b in FIG. Fits into the end. and three cutting blades 11
are simultaneously moved toward the axis of the rotating body 10 by the drive mechanism 14. Therefore, when the cutting blade 11 comes into contact with the pipe 1, the cutting blade 11 also rotates as the rotating body 10 rotates, and the pipe 1 is cut.
Moreover, since the cut pieces 17 are held by the guide tube 15, when a large number of pipes 1 are sequentially cut as described above, the cut pieces 17, 17, . . . are pushed into the guide tube 15, and the pulley 7 It is pushed out from the tail end that protrudes from.

In this way, the present invention provides a guide tube 15 that rotates together with the rotary body on the axis of the rotary body 10 to which the cutting blade 11 is attached, and performs cutting with its tip fitted to the end of the pipe 1. It is. And guide tube 1
5 is provided with a protrusion 16 at the tip thereof, which is inserted into the gap of the cutting blade, so that the cut piece 17 reliably falls into the interior of the guide tube, moves through the guide tube, and exits from the tail end of the guide tube. be discharged. Therefore, the cut piece is the blade 11
There is no risk of the pipe falling to the pipe guide rail 2, which will interfere with the next cutting operation, or falling onto the guide rail 2 of the pipe, which will interfere with the transfer.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a partial cross-sectional view of Fig. 1 at the time of cutting, and Fig. 3 is a plan view of the embodiment of the present invention.
It is an AA sectional view of the figure. In the figure, 1 is a pipe to be cut, 10 is a rotating body, 11 is a cutting blade, 1
2 is a moving mechanism, 15 is a guide tube, and 16 is a protrusion.

Claims (1)

[Scope of utility model registration request] A plurality of disc-shaped cutting blades arranged on one circumference centered on the axis of the rotary body are each rotatably attached to the end face of a rotary body disposed coaxially with the pipe to be cut, and In the cutting machine, the rotary body is provided with a mechanism for simultaneously moving the plurality of cutting blades toward the axis, and a cutting piece guide tube that rotates together with the rotary body is provided on the axis of the rotary body, A pipe cutting machine characterized in that a projection formed at the tip of a guide tube is inserted into a gap between the plurality of cutting blades.