JPH0715213U - Drilling jig - Google Patents

Abstract

(57) [Summary] [Objective] To provide a drilling jig that facilitates drilling of a thin plate with a specially shaped drill. [Structure] When the main shaft of a drilling machine (not shown) is lowered while rotating, the drill 2, the annular metal member 4 and the cylindrical stopper 6 rotate together, and the drill 2 makes a hole 8 in the thin plate 3. After that, the edge of the hole 8 is ground by the cutting surface 2a of the drill 2. After that, when the lower end of the cylindrical stopper 6 comes into contact with the thin plate 3, the drill 2 does not descend, so that the processing of the edge of the hole 8 is completed. At this time, since the cylindrical stopper 6 contacts the thin plate 3,
Stop without spinning. On the other hand, since the annular metal fitting 4 is pressed against the cylindrical stopper 6 via the thrust bearing 7, its rotation does not stop and the drill 2
Continue to rotate with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drilling jig used for drilling with a drilling machine, for example.

[0002]

[Prior art]

 When drilling holes in a thin plate with a drilling machine, the thin plate bends, which makes drilling difficult. For example, as shown in FIG. 2, even if both ends of the thin plate 101 are fixed by the pressing members 102, if the drill 103 is pressed against the thin plate 101, the thin plate 101 will bend, so that the boring process will proceed rapidly. do not do.

Therefore, when the drill 111 having a special shape as shown in FIG. 3 is used, the operation of the drilling machine becomes delicate. The drill 111 has a curved cutting surface 111a, and the cutting surface 111a scrapes off the edge of the hole 113 of the thin plate 112. When processing is performed with such a drill 111, the shape of the edge of the hole 113 changes depending on the degree of the force that presses the drill 111 against the thin plate 112, so that if the thin plate 112 bends, uniform processing is difficult.

If the drill 111 is pressed against the work piece 112 even after the edge of the hole 113 of the work piece 112 is scraped off, the end surface 111 b of the drill 111 contacts the work piece 112 and the work piece 112 is cut. There were cases where the work piece 112 had large scratches and the end surface 111b of the drill 111 was seized on the work piece 112.

[0005]

[Problems to be solved by the device]

 When the thin plate is processed by the drill 111 having a special shape as described above, the operation of the drilling machine is delicate, and the processing of the workpiece 112 must be advanced while observing the processing state of the workpiece 112. , Required skill.

Therefore, an object of the present invention is to provide a drilling jig that facilitates drilling of a thin plate with a drill having a special shape.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, a rotary shaft that supports a cutting tool penetrates, and an annular body that is fixed to this rotary shaft and a cylinder that penetrates this rotary shaft and is connected to this annular body. And a rotary connecting means interposed between the annular body and the tubular body and rotatably connecting the tubular body to the annular body.

[0008]

[Action]

 According to this invention, the tubular body is connected to the annular body via the rotational connecting means, and the annular body is fitted and fixed to the rotary shaft supporting the cutting tool. Here, if the tubular body is properly positioned with respect to the cutting tool, the end of the tubular body will not move when the cutting tool moves to a predetermined position while cutting the workpiece. And the cylindrical body stops. When the tubular body stops, the cutting tool also stops and the cutting ends. At this time, the tubular body does not rotate, but since the tubular body is connected to the annular body via the rotation connecting means, it does not affect the rotation of the annular body and the rotary shaft.

[0009]

【Example】

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

FIG. 1 is a sectional view showing an embodiment of a drilling jig according to the present invention. In the figure, the chuck 1 is attached to the lower end of the main shaft of a drilling machine (not shown) and holds the upper end of the drill 2. At the lower end of the drill 2, there are formed a blade for making a hole 8 in the thin plate 3 which is a workpiece, and a cutting surface 2a for scraping off the edge of the hole 8.

A male screw 2b is formed substantially in the center of the drill 2, and an annular metal fitting 4 and a lock nut 5 are screwed into the male screw 2b. The annular metal fitting 4 is composed of an internal thread portion 4a and an annular collar portion 4b. When the female thread portion 4a is rotated, the annular metal fitting 4 moves up and down, and when the lock nut 5 is tightened on the annular metal fitting 4, the annular metal fitting 4 is fixed. To be done.

The tubular stopper 6 has an annular recess 6a formed on the inner periphery thereof, and the annular flange 4b of the annular metal fitting 4 is fitted into the annular recess 6a. A thrust bearing 7 is provided in the annular recess 6a. The upper and lower rotary rings 7a and 7b of the thrust bearing 7 are fixed to the annular flange 4b of the annular metal fitting 4 and the annular recess 6a of the tubular stopper 6. As a result, the cylindrical stopper 6 is rotatably connected to the annular metal member 4.

When the spindle of the drilling machine is lowered while being rotated, the drill 2, the annular tool 4 and the cylindrical stopper 6 are also lowered while rotating, and the drill 2 makes a hole 8 in the thin plate 3, Subsequently, the edge of the hole 8 is scraped off by the cutting surface 2a of the drill 2. After that, when the lower end of the cylindrical stopper 6 comes into contact with the thin plate 3, the drill 2 does not descend, and the processing of the edge of the hole 8 is completed. At this time, since the cylindrical stopper 6 contacts the thin plate 3, it stops without rotating. On the other hand, since the annular metal fitting 4 is pressed against the cylindrical stopper 6 via the thrust bearing 7, its rotation does not stop and continues to rotate together with the drill 2.

When the lower end of the cylindrical stopper 6 contacts the thin plate 3 in this way, the cutting by the drill 2 is completed and the rotation of the cylindrical stopper 6 is stopped. Here, as described above, since the annular metal fitting 4 can be moved up and down, the tubular stopper 6 can be moved up and down together with the annular metal fitting 4 to appropriately position the tubular stopper 6. As a result, the stopping position of the cutting surface 2a of the drill 2 with respect to the thin plate 3 is also determined, so that the extent to which the edge of the hole 8 is scraped off can be set. Therefore, if the cylindrical stopper 6 is positioned in advance, uniform boring can be repeated by a simple operation of lowering the spindle of the drilling machine until the lower end of the cylindrical stopper 6 contacts the thin plate 3. It does not require skill.

Although a drilling machine is exemplified in the above embodiment, the present invention can be applied to any machine tool that rotates a cutting tool to cut a workpiece.

[0016]

【effect】

 As described above, according to the present invention, if the tubular body is appropriately positioned with respect to the cutting tool, when the cutting tool moves to a predetermined position while cutting the workpiece, The end of the tubular body comes into contact with the workpiece, and the cutting is completed. Therefore, no skill is required even for drilling a thin plate with a specially shaped drill.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a hole forming jig according to the present invention.

FIG. 2 is a diagram showing a state when punching a thin plate with a drilling machine.

FIG. 3 is a diagram illustrating a drill of a drilling machine and a hole of a thin plate.

[Explanation of symbols]

 1 Chuck 2 Drill 3 Thin Plate 4 Annular Metal Fitting 5 Lock Nut 6 Cylindrical Stopper 7 Thrust Bearing

Claims (1)

[Scope of utility model registration request] 1. A rotating body supporting a cutting tool penetrates and is fixed to the rotating body, an annular body, a cylindrical body penetrated by the rotating body and connected to the annular body, and these annular bodies. And a rotary connecting means interposed between the tubular body and rotatably coupling the tubular body to the annular body.