JPS63295030A - Device for punching metal pipe of copper pipe and the like - Google Patents

Abstract

PURPOSE:To prevent a burr being generated and a copper chip remaining on an inner face like a punching from the pipe outer face direction by punching a copper pipe at its hole by a punching tool from the inner face direction thereof. CONSTITUTION:A copper pipe P is fitted to the outer face of a cylindrical body 1 and a sliding shaft 4 on which a spring pressure is energized in a free end direction inside the cylindrical body 1 is pressure-fed against the spring pressure by a pressure feeding body 7. The punching projection 12 formed at the work end side of the lever 10 pivotally fitted to the cylindrical body 1 so as to always abut to the slope that a work end side is formed on the sliding shaft 4 is guided by the slope, moved by advancing in the direction orthogonal with the sliding shaft 4 via the notch hole 1a formed on the cylindrical body 1 and the copper pipe P is subjected to punching. With the pressure feeding of the pressure feeding body 7 being released the sliding shaft is restored by the spring pressure and the punching projection at the work end side of the lever abutting to the slope thereof is restored as well to the original position. By this punching no burr on the pipe inner face is caused nor a copper chip remains inside the copper pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a drilling device that punches a hole in a metal pipe such as a copper pipe from the inner surface of the pipe using a punching tool.

<Prior Art> Conventionally, when drilling a hole in a copper pipe, a cored metal rod is passed through the copper pipe to be drilled, and then the hole is punched out from the outer surface of the copper pipe.

<Problems to be Solved by the Invention> However, the following disadvantages have been pointed out with the conventional apparatus that punches holes from the outer surface of the copper pipe using a punch.

First, the outer shape of the core rod that is passed through the copper pipe needs to be brought into close contact with the inner surface of the pipe in order to prevent the copper pipe from deforming due to the pressure caused by the punching. It is difficult to remove the cored metal rod from the drilled copper pipe after the hole is drilled due to the generated spalling. In order to eliminate this problem, if a gap is formed between the inner surface of the copper pipe and the outer surface of the cored metal, the pipe will be deformed by this gap.

Furthermore, in the case of a device that punches a hole from the outer surface of a copper pipe to form a hole, copper scraps generated by the drilling process remain inside the copper pipe, and therefore, it is necessary to take out the copper scraps.

In view of the current situation, the present invention provides a drilling device that can eliminate all the problems caused by punching by punching a hole from the inner surface of a copper pipe to be drilled using a punching tool.

<Means for Solving the Problems> In order to achieve the purpose of picking up the material, the present invention provides a method for handling metal workpieces, such as copper pipes, which is horizontally protruded from a support fixed to the upper part of the base. A cylindrical body formed to removably support the inner surface of a pipe on its outer surface.

a sliding shaft that is movably fitted into the cylindrical body and is biased with a spring pressure toward the free end of the cylindrical body by a spring body; and (5) a pressing force that can push the sliding shaft against the spring pressure. a lever that is pivotally mounted to the cylindrical body so that its operating end side always comes into contact with the slope formed on the sliding shaft;

The lever is formed on the operating end side of the lever, and can move forward and backward in a direction perpendicular to the moving direction of the sliding shaft through a notch hole formed in the cylindrical body while being guided by the slope of the sliding shaft. To provide a punching projection and a drilling device for metal pipes such as copper pipes.

According to the drilling device of the present invention configured as described above, first, the copper pipe to be drilled is manually fitted onto the outer surface of the cylindrical body, and then inserted into the cylindrical body in this state. The sliding shaft, which is biased with spring pressure in the direction of the free end of the cylindrical body, is pushed in a direction against the spring pressure by the pressing body. When the sliding shaft is pushed in the direction opposite to the spring pressure, the operating end side of the lever is pivoted to the cylindrical body so that the operating end side always comes into contact with the slope formed on the sliding shaft. The formed punch-out protrusion is guided by the slope of the sliding shaft and moved in a direction perpendicular to the moving direction of the sliding shaft through a notch hole formed in the cylindrical body, and this advancing movement The copper pipe fitted on the outer surface of the cylindrical body is punched out from the inner surface by the punching protrusion to form a hole. Then, when the pushing by the pressing body against the spring pressure is released, the sliding shaft is urged by the spring pressure and returns to its original position. A push-out projection formed on the operating end side of the lever pivotally mounted on the lever is also guided by the slope and returned to its original retracted position. Then, the copper pipe that has been drilled is removed from the cylindrical body.

<Example> Embodiments of the present invention will be described below based on the drawings.

Fig. 1 is a vertical side view showing an example of a drilling machine, Fig. 2
Each of the figures also shows a plan view.

Reference numeral 1 indicates a cylindrical body, and this cylindrical body 1 projects horizontally from a support 3 fixed to the upper part of a base 2, and removably supports the inner surface of a copper pipe P to be drilled with its outer surface. It is designed so that it can be used. , 4 indicates a sliding shaft, which is movably fitted into the cylindrical body 1, and whose rear end side protrudes through the support body 3, and which is attached to this protruding end. The driven body 5 is fixed. and,
This sliding shaft 4 is biased by spring pressure toward the free end of the cylindrical body 1 via the driven body 5 by spring bodies 6, 6.

Reference numeral 7 indicates a pressing body, and this pressing body 7 has a function of pushing the sliding member #4 against the spring pressure of the spring body 6. To explain further, this pressing body 7 is vertically installed on an elevating plate 9 attached to an elevating shaft 8 of a press device (not shown), in a direction perpendicular to the sliding shaft 4 that moves horizontally, and in a direction perpendicular to the driven shaft 4. It is configured to be able to move forward and backward between the opposing surfaces of the body 5 and the support body 3. A slope 5a is formed on the side of the driven body 5 facing the support 3, and when the slope 5a comes into contact with the slope 7a formed on the pushing body 7 that advances and is pushed further, As shown by the two-dot chain line in FIG. 1, the driven body 5 is configured to be pushed in a direction opposite to the spring pressure based on the wedge principle. Therefore, the sliding shaft 4 fixed to the driven body 5 is also pushed in the direction against the spring pressure. When the pressing body 7 is moved backward, the driven body 5, which is biased by the spring pressure, is returned to its original position.

Reference numeral 10 denotes a lever, and the operating end side of the lever 10 is pivotally connected to the cylindrical body 1 via a shaft pin 11 so as to always come into contact with a slope 4a formed on the sliding shaft 4. In this embodiment, the difference in weight between the two ends of the lever with the axis pin as a boundary is used as a means to keep the operating end of the lever 10 in constant contact with the slope 4a, but it is also possible to use spring pressure. be. Further, reference numeral 12 indicates a punch-out projection, which is formed on the operating end side of the lever 10, and is guided by the slope 4a of the sliding shaft 4 to form a notch hole formed in the cylindrical body 1. It is configured so that it can move forward and backward in a direction perpendicular to the moving direction of the sliding shaft 4 via the shaft 1a. Therefore, when the sliding shaft 4 is pushed in the direction opposite to the spring pressure, the lever 10, which is pivoted to the cylindrical body, is actuated so that the first operating end side is always in contact with the slope 4a of the sliding shaft 4. A punch-out projection 12 formed on the end side is guided by the slope 4a of the sliding shaft 4 to form a notch hole 1 formed in the cylindrical body 1.
a in a direction perpendicular to the moving direction of the sliding shaft 4, and as a result of this advancing movement, the copper pipe P fitted on the outer surface of the cylindrical weight is punched out from the inner surface by the punching protrusion 12 and drilled. Ru. Then, when the pushing by the pressing body 7 against the spring pressure is released, the sliding shaft 4 is urged by the spring pressure and returns to its original position, and accordingly, it is always in contact with the slope 4a of the sliding #I4. In this manner, the push-out projection 12 formed on the operating end side of the lever 10 pivotally mounted on the cylindrical body 1 is also guided by the slope 4a and returned to the original retracted position. Then, the copper pipe P that has undergone the drilling process is pulled out from the cylindrical body 1.

Reference numeral 13 denotes a stroke adjusting screw screwed onto the tip of the sliding shaft 4, and by adjusting the stroke adjusting screw 13, the maximum stroke at which the sliding shaft 4 is pushed against the spring pressure is set. Therefore, by adjusting the stroke adjustment screw 13 and the pushing amount of the pressing body 7 into the driven body 5, the stroke at which the sliding shaft 4 is pushed against the spring pressure can be adjusted. The degree of advance for the 12 copper pipes P can be adjusted. As a result, for example, by reducing the extent to which the punching protrusion 13 advances into the copper pipe P, the punching protrusion 13 simply forms a recessed portion without penetrating the copper pipe P.
It is also possible to form notches on the surface of copper pipes.

Reference numeral 14 denotes a stand that supports the copper pipe P fitted in the cylindrical body 1, and this support has a U-shaped groove that follows the outer surface of the copper pipe P on the mounting surface of the stand 14.

Further, reference numeral 15 denotes an escape groove for the punching projection 12 formed on the base 14, and this relief groove 15 is communicated with a discharge hole 16 for copper waste produced when the punch is punched out.

17 is a presser guide member hanging from the lifting plate 9;
This holding guide member 17 is configured to lightly press the copper pipe P fitted into the cylindrical body 1 from above via the spring pressure of the spring body 18. The holding surface of the holding guide member 17 is formed with a U-shaped groove that follows the outer surface of the copper pipe P, similar to the mounting surface of the support.

<Effects of the Invention> As described above, according to the drilling device of the present invention, the hole can be effectively punched out from the inner surface of the copper pipe by the punching tool from the inner surface of the pipe. Because of this, it has been pointed out that the conventional drilling method uses a punching tool to punch out a hole from the outer surface of a copper pipe that has passed through a cored metal rod. It is difficult to remove the core metal rod from the drilled copper pipe after the hole is drilled due to the cracks generated on the inner surface of the pipe due to punching from the outside direction of the pipe. If a gap is formed between the outer surface and the
It is possible to eliminate the disadvantages that the pipe is easily deformed due to this gap and that copper scraps generated by drilling remain in the copper pipe.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing an example of the drilling device of the present invention, and FIG. 2 is a plan view thereof. 1... Cylindrical body, 1a... Notch hole, 2... Base,
3...Support body, 4...Sliding shaft, 4a...Slope, 5
...Followed body, 6... Spring body, 7... Pressing body, 9.
... Lifting plate, 10... Lever, 12... Push-out protrusion, P... Copper pipe.

Claims (1)

[Scope of Claims] Projects horizontally from a support fixed to the upper part of the base, and is formed so that the inner surface of a metal pipe such as a copper pipe, which is a workpiece, can be removably supported on its outer surface. a cylindrical body, a sliding shaft movably inserted into the cylindrical body and biased by a spring pressure toward the free end of the cylindrical body by a spring body; and a sliding shaft that resists the spring pressure by a spring body. a lever that is pivotally connected to the cylindrical body so that its operating end side is always in contact with the slope formed on the sliding shaft; and a lever that is formed on the operating end side of the lever. , a punching protrusion that is guided by the slope of the sliding shaft and can move forward and backward in a direction perpendicular to the direction of movement of the sliding shaft through a notch hole formed in the cylindrical body. Features: Drilling equipment for metal pipes such as copper pipes.