JP2002361509A - Drill with reamer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drill with a reamer simple in formation itself, easy to manufacture, free to increase length of a part which is cut and worked and applied with reaming finishing work and free to apply the reaming finishing work to the extreme end of a head end of it. SOLUTION: This drill with the reamer is simple in its formation itself and can be easily manufactured as a head end cutting blade 11 formed on the head end of the drill 10 with the reamer and an outer cutting blade 12 formed at a smaller angle by an angle of the cutting blade against a central shaft 10a of the drill 10 with the reamer are continuously arranged, reaming finishing can be almost simultaneously carried out with cutting, the part on which the cutting work and the reaming finishing work are carried out can be lengthened to the utmost, and the reaming finishing can be carried out to the extreme end of the head end even in the case of not passing through a work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drill with a reamer which can ream a hole while cutting the hole.

[0002]

2. Description of the Related Art Conventionally, as one of tools for drilling holes in a metal material, there is a drill reamer for performing reamer finishing while drilling holes (for example, JP-A-8-155715). FIG. 5 shows an external perspective view of a conventional drill reamer. The drill reamer 100 has a tip cutting edge 11 which is a cutting edge for a drill and a shank 13 which is a handle portion of a drill at the tip side.
On the shank 13 side, there are provided an external cutting edge 12 which is a cutting edge for a reamer, and a groove 14 and a rake face 15 for discharging metal chips cut by the tip cutting edge 11 to the shank 13 side. . Next, the hole drilling operation of the conventional drill reamer 100 based on the above configuration will be described. When making a hole in a workpiece made of a metal material, by inserting the drill reamer 100 into the workpiece,
A hole is first formed by cutting a hole with a tip cutting edge 11 formed at the tip of the drill reamer 100, and an external cutting edge 1 formed on the shank 13 side of the drill reamer 100 is formed.
By performing reaming on the inner wall surface of the hole formed in step 2, it is possible to form a circular hole in which the inner wall surface of the processed hole is finished in the workpiece.

[0003]

A conventional drill reamer 1
Since 00 is configured as described above, the tip cutting edge 11 for the drill and the external cutting edge 12 on the shank side 13 are formed apart from each other, and this tip cutting edge 11 and the external cutting edge 1 are formed.
Since each diameter is different from that of No. 2, there is a problem that the formation itself is complicated and time is required for manufacturing. Drill reamer 1
The ratio of the length of the part where the cutting process was performed and the reaming process was performed was smaller than the total length of the drill. Especially when it did not penetrate the workpiece to be cut, the tip of the hole was reamed. There is a problem that many parts are not formed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the formation itself is simple and can be easily carried out. Further, the length of a portion which is cut and subjected to reaming is provided. It is an object of the present invention to provide a drill with a reamer capable of increasing the size and performing reaming as far as possible at the tip.

[0005]

A drill with a reamer according to the present invention is provided with a cutting edge formed at the tip of the drill and a cutting edge with respect to the center axis of the drill, the cutting edge being arranged continuously around the outer periphery of the cutting edge. And an external cutting edge formed at a smaller angle. Thus, in the present invention, since the tip cutting edge formed at the tip of the drill and the external cutting edge formed at a smaller angle to the angle of the cutting edge with respect to the center axis of the drill are arranged continuously, When the formation itself is simple and easy to manufacture, and reaming is performed almost simultaneously with cutting, the part where cutting and reaming is performed is made as long as possible and does not penetrate the workpiece However, it is possible to finish the reaming as far as possible at the tip.

In the drill with a reamer according to the present invention, the angle of the cutting edge with respect to the central axis is 50 ° to 65 °, and the angle of the external cutting edge with respect to the central axis is 0.1 ° to 1 °, if necessary. 0.0 ° and a height of 2 mm to 10 mm.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment of the Present Invention) A drill with a reamer according to a first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view and a front view of a drill with a reamer according to the present embodiment. FIG. 2 is an enlarged view of a cutting edge of the drill with a reamer according to the present embodiment.
FIG. 4 is an explanatory diagram of a cutting operation of a workpiece by the drill with a reamer according to the present embodiment, and FIG. 4 is an explanatory diagram of a cutting operation of another workpiece by the drill with a reamer according to the present embodiment.

In FIG. 1, a drill 10 with a reamer according to the present embodiment is provided continuously with a tip cutting edge 11 which is a cutting edge formed at the tip of the drill and an outer peripheral portion of the tip cutting edge 11. External cutting edge 1 which is the cutting edge to be formed
2, a shank 13 which is a handle portion of a drill, a groove 14 and a rake face 15 for discharging metal chips cut by the cutting edge to the shank side.

The tip cutting edge 11 is provided at the center axis 1 of the drill.
The angle θ1 with respect to 0a is constituted by a cutting edge of 50 to 65 °. Further, the outer cutting edge 12 has an angle θ2 of 0.2 ° to 0.4 ° with respect to the center axis 10a of the drill.
And a cutting edge region having a height L1 of 3 mm to 5 mm. However, the external cutting edge 12, the angle θ2 with respect to the central axis of the external cutting edge, and the height L1 of the external cutting edge slightly exaggerate the angle and height with respect to the drill central axis 10a in order to facilitate understanding in the drawings. Is shown.

Next, the operation of the drill with a reamer according to this embodiment based on the above configuration will be described. As an object to be cut by the reamed drill 10, one reamed drill 10
A rectangular workpiece 20 having a processing dimension larger than the dimensions of the cutting and reamer finishing that can be performed is used. As a processing method for the workpiece 20 in which a through hole having such a large processing size is formed, the workpiece 2
0 is cut from both side surfaces by a drill 10 with a reamer.
As pre-processing before cutting, positioning is performed so that the tip of the drill 10 with a reamer is aligned with the position of a cutting target. In particular, when cutting and penetrating from both opposing surfaces of the workpiece 20, highly accurate positioning must be performed. After performing the positioning process, actual cutting and reaming are started.

First, the drill 10 with the reamer is pressed into contact with the positioned processing point on one side surface of the workpiece 20, so that the tip cutting edge 11 formed at the distal end of the drill 10 with the reamer is used. First, a hole is formed. Almost at the same time, the inner wall surface of the formed hole is reamed by the outer cutting edge 12 of the reamed drill 10, and a hole 31 penetrating from one surface of the workpiece 20 to the middle is formed. . Next, positioning is performed in the same manner from the other side surface of the workpiece 20, and actual cutting and reaming using the reamed drill 10 are performed. Work 2 progresses to some extent
When a hole is formed in the workpiece 20, the hole communicates with the hole 31 that has been cut and formed and penetrates from one side of the workpiece 20 halfway, and the hole 30 that has penetrated the workpiece 20 is formed. You. As described above, according to the present embodiment, since the leading edge 11 and the outer edge 12 are formed continuously, the formation itself is simple and the production can be performed in a short time. And reaming is done almost simultaneously.

Next, the operation of the drill with a reamer according to the present embodiment in FIG. 4 will be described by defining holes corresponding to the semicircular grooves C40, C41, C42, and C43 formed in the workpiece 40 with the drill with the reamer. The case of performing the cutting process and the reaming process with reference to FIG. Here, FIG.
In the above, the semicircular groove 41 is a semicircular groove having the same diameter as the diameter of the drill 10 with a reamer, and the workpiece 40 has a concave portion-shaped space portion at the center portion, and a side surface in contact with the space portion. Are formed with four semicircular grooves 41.

The positioning of the drill 10 with a reamer is performed by using the semi-circular groove C4 in the front of the workpiece 40.
A distance L21 in the lateral direction from the center point of 0,
Each distance L22 in the thickness direction with the bottom surface of
The separated point is measured to specify the contact point P40a. Further, on the back surface of the workpiece 40, similarly, a point separated from the center point of the semicircular groove C40 by a distance L21 in the lateral direction and a distance L22 in the thickness direction with the bottom surface of the workpiece 40 as a reference plane. Is measured to specify the contact point P40b.

Similarly to the contacts P40a and P40b, the corresponding contacts P41a and P41b and the contacts P42a and P42 corresponding to the semicircular grooves C41, C42 and C43, respectively.
b. Positioning is performed by obtaining the contact points P43a and P43b. However, the contact point P41 corresponding to the semicircular grooves C41 and C43
When a and P41b and P43a and P43b are obtained, the distance L23 is set in the thickness direction with the bottom surface of the workpiece 40 as a reference plane.

After performing the positioning process, actual cutting and reaming are started. The contact point P4
0a and the drill 10 with the reamer.
Cutting and reaming from the front of 0
The reamed drill 10 is aligned with 40b to perform cutting and reaming from the back surface of the workpiece 40. When the cutting process and the reaming process are completed, a through hole of the workpiece 40 is formed. Similarly, the contact point P4
Holes are also formed by cutting and reamer finishing 1a and P41b, the contacts P42a and P42b, and the contacts P43a and P43b. In this case, it is desired that the hole drilled from the front and the hole drilled from the back completely penetrate through the hole due to the vibration of cutting and reaming, but even if a very small deviation occurs, it is necessary for the purpose of the bearing. In the case of using, it is possible to perform processing while giving a margin to the size of the processing diameter. If it is sufficient if the processing surface is smooth by such processing, the metal step on the collision surface caused by the displacement can be eliminated by the reamer finish.

[0016]

As described above, in the present invention, the tip cutting edge formed at the tip of the drill and the external cutting edge formed at an angle smaller than the angle of the cutting edge with respect to the center axis of the drill are continuously arranged. Since it is provided, the formation itself is simple and it can be easily manufactured.Also, reaming is performed almost at the same time as cutting, and the portion where cutting and reaming are performed is made as long as possible, and Even if the workpiece does not penetrate, the reaming can be performed as far as possible at the tip.

[Brief description of the drawings]

FIG. 1 is a plan view and a front view of a reamer drill according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged view of a cutting edge of the reamer drill according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a cutting operation of a workpiece by a drill with a reamer according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram of a cutting operation of another workpiece by a drill with a reamer according to a second embodiment of the present invention.

FIG. 5 is an external perspective view of a conventional drill reamer.

[Description of Signs] 10 Drill with reamer 10a Center axis of drill 11 Tip cutting edge 11a Main flank 12 External cutting edge 13 Shank 14 Groove 15 Rake face 20 Workpiece 30 Hole through which workpiece 20 31 Workpiece 31 20 A hole penetrating from one side to a halfway θ1 The angle of the leading edge to the central axis θ2 The angle of the external edge to the central axis L1 The height of the external edge 40 Workpieces C40, C41, C42, C43 Semicircular groove L21, L22, L23 Distance P40a, P41a, P42a, P43a Contact point P40b, P41b, P42b, P43b Contact point 100 Drill reamer

Continued on the front page F-term (reference) 3C037 EE05 3C050 EB08

Claims (2)

[Claims] 1. A cutting edge formed at a tip of a drill, and an external cutting edge disposed continuously on an outer peripheral portion of the cutting edge and formed at an angle smaller than an angle of the cutting edge with respect to a center axis of the drill. A drill with a reamer, comprising: 2. The drill with a reamer according to claim 1, wherein the cutting edge has an angle of 50 ° to 65 ° with respect to a central axis.
A drill with a reamer, wherein the external cutting edge has an angle of 0.1 ° to 1.0 ° with respect to a central axis and a height of 2 mm to 10 mm.