JPH0117378Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pipe drilling device for forming a through hole in a pipe.

Conventionally, when drilling a through hole in a direction perpendicular to the longitudinal direction of a pipe, for example,
As shown in the publication, a die fitted into the pipe and a punch are used to punch one side (upper side) of the pipe, and then the pipe is turned over and punched on the other side (upper side). It is common to perform punching on the initial (lower side).

Therefore, in the past, it took time to reverse and position the pipe, which caused problems in improving work efficiency, and especially in the case of round pipes, the axis of the holes drilled on one side and the other side of the pipe There are also problems with machining accuracy, such as the fact that the two parts may not match.

Therefore, after punching the upper side of the pipe, it may be possible to continue punching the lower side of the pipe, but when punching the lower side, it is important to avoid any damage caused by punching the upper side. A new problem arises in that punching scraps are present and the punch and die are likely to be damaged.

This idea was made in view of the conventional problems, and after punching out the upper side of the pipe, the punched scum is caught by a scum removal rod passed inside the pipe and removed to the outside. After taking it out, hold the pipe as it is without turning it over, and punch out the hole at the bottom of the pipe directly to make sure the axis of the hole on both sides of the pipe is accurate. It is an object of the present invention to provide a pipe hole punching device that can punch holes in accordance with each other.

The embodiment shown in the figures will be explained in detail below. 1st
The figure shows an entire embodiment of this invention, in which a ram 3 is provided on the upper side of a frame 1, and a base 5 is provided on the lower side. A die 7 and a punch assembly 9 are provided on the base 5. This punch assembly 9 is supported by the base 5 by a lifter spring 11.

The die 7 and the punch assembly 9 will be described in more detail with reference to FIGS. 2 to 5. The die 7 is mounted on the base 5, and includes a punch 17 in the punch assembly A die hole is provided which cooperates with the die hole. Further, a punch head 15 is supported on the base 5 by a lifter spring 11 and a lifter bolt 13, and a portion of this punch head 15 is attached to the ram 3.
It is designed to move up and down depending on the pressure of the A punch 17 is attached to the underside of this punch head 15, and a screw 1 is attached to the punch head 15.
9, and a stripper plate 23 is also attached by a strong stripper spring 21.

An end portion of a cylindrical pipe holding member 25 for supporting a pipe W as a workpiece is fixed by a fixing block 27 on the base 5. A recess 29 is formed in the lower surface of the pipe holding member 25 over the entire length in the longitudinal direction, into which a scrap removal rod 31 shown in detail in FIG. 4 is inserted and removed by a cylinder device 33. has been done. As shown in detail in FIG. 5, the pipe holding member 25 has the recess 2 at a position corresponding to the lowered position of the punch 17.
9 is formed as an example of a die hole. Further, as shown in FIGS. 4 and 5, this escape hole 3 of the scrap removing rod 31
A sludge receiving recess 37 with a flat bottom is formed in a portion corresponding to 5. Furthermore, the lower side of this scrap removing rod 31 is supported by a support band 39.

Returning to FIG. 2, a cylinder device 41 is also provided on the side of the punch head 15, and a striker 43 as a member for raising the height of the punch is attached to this cylinder device 41. It is free to advance and retreat.

The operation of the pipe drilling device described above will be explained next.
As shown in Figure 2, the pipe W is held by the pipe holding member 2.
5 and set it on the die 7. Then, move the striker 43 to the punch head 15.
In the more retracted state, the ram 3 is operated to apply pressure to the punch head 15 and the punch 17 is lowered. As a result of this operation, the stripper plate 23 first presses and holds the pipe W as shown in FIG. 2, and then the punch 17 presses and holds the pipe W as shown in FIG.
Punch out only one side of the top and make a hole. and,
After drilling this hole, the ram 3 is returned to its original position. At this time, since the gap between the ram 3 and the punch head 15 is large and the stroke of the ram 3 is constant, the amount of descent of the punch head 15 is small and the hole is drilled only on the upper side of the pipe W.

At this time, the punching scraps P fall through the scrap relief hole 35 of the pipe holding member 25, as shown in FIG. 6, and are received by the scrap receiving recess 37 of the punching scrap removing rod 31. Therefore, the cylinder device 33 is driven to extract the punching dregs removing rod 31 from the recess 29, and the punching dregs P are also taken out.

Next, with the scrap removal rod 31 still being pulled out, the cylinder device 41 is driven to remove the second residue.
The striker 43 is advanced onto the punch head 15 as shown in FIGS. Then, the ram 3 is driven again, the punch head 15 is pressed through the striker 43, and the punch 17 punches out the lower side of the pipe W to make a hole. At this time, since the striker 43 is present on the punch head 15, the distance between the ram 3 and the striker 43 narrows, and the amount of descent of the punch 17 increases, allowing the tip to reach the bottom of the pipe W. . The punching waste P generated at this time is discharged through the discharge hole of the die 7.

In this way, in the pipe drilling device of this embodiment, a hole is made in the upper side of the pipe W by lowering the ram 3 twice, and after removing the punching waste P that has been generated, a hole is also made in the lower side. It is.

As can be understood from the above description of the embodiments, this invention is based on the idea that the lower part of the pipe W is formed in a position above the die 7 that supports the pipe W in cooperation with a die hole formed in the die 7. A punch head 15 equipped with a punch 17 for perforating is provided so as to be movable up and down, and between the punch head 15 and a ram 3 that applies pressure to the punch head 15, the lowered position of the punch 17 is set by the impact force of the ram 3. A striker 43 for switching between at least two stages is provided to move forward and backward, and the pipe holding member 25, which can be relatively fitted into the pipe W, is provided with a striker 43 that cooperates with the punch 17 to perform perforation in the upper part of the pipe W. A punching scrap removing rod 31 is provided with a relief hole 35 for receiving and removing punching scraps P falling from the relief hole 35.
is provided movably within a longitudinal recess 29 provided on the lower surface of the pipe holding member 25, and the punch 1
The lower end of the die 7 is provided so as to be able to pass through the escape hole 35 of the pipe holding member 25 and engage with the die hole of the die 7.

As is clear from the above configuration, in the present invention, the die 7 supporting the pipe W and the pipe W
The pipe holding member 25 that can be freely fitted inward is provided with a die hole that cooperates with the punch 17, and the punch 1
7 is a member that can freely pass through the pipe holding member 27. Therefore, when drilling the upper and lower sides of the pipe W, there is no need to turn the pipe W over, which improves efficiency and allows the axes of the upper and lower holes to coincide. Further, since the punching chips P generated when punching the upper side of the pipe W is removed by the removal rod 31, when punching the lower side of the pipe W, P does not get in the way, and the lower side can also be punched with high precision.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of this invention, Fig. 2 is an enlarged perspective view of the punch assembly portion of the above, Fig. 3 is an enlarged front sectional view of the same above, and Fig. 4 is a punching used in the embodiment of the above. FIG. 5 is an enlarged front cross-sectional view of the assembled state of the pipe holding member and the scrap removal rod in the same embodiment, and FIGS. 6 and 7 are action explanatory views of the same embodiment. be. 3... Ram, 7... Die, 9... Punch assembly, 15... Punch head, 17... Punch,
25...pipe holding member, 29...recess, 31...
...Drag removing rod, 35...Drag escape hole, 37...
...Drag receiving recess, 43...Striker.

Claims (1)

[Scope of utility model registration request] A punch head 15 equipped with a punch 17 for punching the lower part of the pipe W in cooperation with a die hole formed in the die 7 is arranged above the die 7 that supports the pipe W so as to be movable up and down. The punch head 15 is provided between the punch head 15 and a ram 3 that presses the punch head 15, and the punch 1 is
A striker 43 for switching the lowering position of the pipe W to at least two stages is provided so as to be movable forward and backward.
A pipe holding member 25 that can be relatively fitted into the pipe holding member 25,
A relief hole 35 is provided for drilling the upper part of the pipe W in cooperation with the punch 17, and a punching swarf removal rod 31 for receiving and removing the punching swarf P falling from the relief hole 35 is provided to hold the pipe. Member 25
is provided movably in a longitudinal recess 29 provided on the lower surface of the punch 17, and allows the lower end of the punch 17 to pass through the relief hole 35 of the pipe holding member 25 and engage with the die hole of the die 7. A pipe drilling device characterized by comprising: