JP3361963B2 - Tooling equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool device. 2. Description of the Related Art FIG.
As shown in FIG. 2, conventionally, a tool mounted on an automatic rotating tool, for example, an electric rotating tool, for example, a drill 11, 21 has a hexagonal cross-section holder 12, 22 for mounting on the automatic rotating tool.
It is common to mount the drill-equipped holder on an electric rotating tool to perform drilling work. [0003] By the way, the holders 12, 22 and the drill 11,
For example, as shown in FIG. 1, as shown in FIG. 1, a holder 12 having a hexagonal cross section formed by cutting a hole 12 a having a predetermined depth in the axial direction is provided, and the hole 12 a of the holder 12 is provided. There is a connection method (hereinafter, referred to as a first conventional method) in which the support portion 14 of the drill 11 is fitted into the hole and the hole portion 12a and the support portion 14 of the drill 11 are fixed with an adhesive. This first conventional method is intended to prevent the drill 11 from coming off and stopping against the holder 12 with an adhesive. [0004] The connection between the holder 12 and the electric rotating tool is performed by engagement between a concave groove 12c provided in the holder 12 and a steel ball provided in the electric rotating tool. The portion of the electric rotating tool to which the holder 12 is mounted has a hexagonal cross section that matches the shape of the holder 12, whereby the holder 12 is prevented from rotating with respect to the electric rotating tool. However, the first conventional method has a drawback that the drill 11 rotates in the hole 12a during repeated use, and furthermore, the drill 11 falls out of the holder 12. In order to solve this disadvantage, there is a connection method as shown in FIG. 2 (hereinafter referred to as a second conventional method). In the second conventional method, the drill 21 is formed by cutting a part of the drill 21 from the base end toward the axial end and forming a concave step portion 21a having a rectangular cut surface.
On the other hand, as the holder 22, a holder 22 having a hole 22a having a predetermined depth in the axial direction is formed by cutting as described above, and a drill is inserted into the insertion hole 22a of the holder 22.
This is a connection method in which the support portion 24 of the holder 21 is fitted, press caulking P is performed at the position of the concave step portion 21a on the outer peripheral surface of the holder 22, and the two are connected. Although the second conventional method is excellent in reliably preventing the drill 21 from coming off and stopping from the holder 22 by the press caulking P, it has the following problems. Due to the characteristics of the press caulking P, the holder 22 with a drill obtained by the second conventional method is inferior in accuracy. That is, due to the caulking force applied to the holder 22, the tip (working portion) of the drill 21 is displaced from the axis of the holder 22, and the accuracy is deteriorated. Further, common problems including the first conventional method include forming and cutting the holes 12a and 22a of the holders 12 and 22, forming the grooves 12c and 22c, and cutting the holders 12 and 22 in cross section. Hexagonal shape forming work is very troublesome,
There are also problems such as an inability to increase mass productivity and an excessive cost. The present invention provides a tool device that solves the above-mentioned problems. The gist of the present invention will be described with reference to the accompanying drawings. A tool 1 having a working portion 1a at the distal end and a supporting portion 1b at the base end, and having a diameter substantially equal to the outer diameter of the supporting portion 1b of the tool 1
A hole 2a set to the inner diameter and into which the support 1b is fitted
A tool device and the holder 2 is formed by press-fitted with, the supporting portion 1b of the tool 1 'is provided, the recess 1b' recess 1b distribution in protruding state from the recess 1b 'in
A material harder than the hardness of the inner wall of the hole 2a of the holder 2
Quality locking member 3 is provided.
b ', the support 1b of the tool 1 is
Is press-fitted into the hole 2a, and the hole 2a is
The tool wall is deformed so that the tool 1 and the holder 2 are locked and connected. The present invention provides a tool 1 and a holder 2
In connection with the above, the locking member 3 is arranged in the concave portion 1b 'provided in the support portion 1b of the tool 1, and in this state, the support portion 1b of the tool 1 is press-fitted into the hole 2a of the holder 2 to press the hole 2a.
The tool 1 and the holder 2 are firmly locked and connected by locking the locking member 3 to the inner wall. Since the present invention is constructed as described above, a firm connection between the tool 1 and the holder 2 is surely achieved and the tool 1
The tool device can apply a strong torque to the tool. Further , according to the present invention, since the inner diameter of the hole 2a of the holder 2 is set to be substantially equal to the outer diameter of the support 1b of the tool 1, the press caulking is performed as in the second conventional method. It is reliably resolved that the tip of the holder is displaced from the axis of the holder and the accuracy is deteriorated.
As described above, the locking member 3 is locked to the inner wall, and thus a tool device having high precision and excellent durability can be obtained. FIGS. 3, 4, 5, 6 and 7 show a first embodiment of the present invention, and FIG. 8 shows a second embodiment, which will be described below. The first embodiment will be described. As shown in FIG. 3, the tool 1 is formed with a drill groove 1a 'as an action portion 1a at a distal end thereof, and
A concave portion 1 having a rectangular cut surface in the base end side support portion 1b.
b ′ is a round bar-shaped drill formed. As shown in FIG. 3, the locking member 3 is formed by forming an appropriate steel member of a material harder than the hardness of the inner wall of the hole 2a of the holder 2 into a spherical shape. This locking member 3
Is arranged in the concave portion 1b 'of the support portion 1b of the tool 1, and is arranged to protrude from the upper surface of the concave portion 1b' when arranged in the concave portion 1b '. As shown in FIG. 3, the holder 2 is made of a material that is not so hard such as zinc or aluminum, that is, a metal material that is softer than the hardness of the locking member 3 by die-casting using a die. The tip of the holder 2 extends from the tip surface to a predetermined position in the axial direction.
Hole 2 having an inner diameter substantially equal to the outer diameter of the support portion 1b
a is formed. Therefore, the locking member 3 is connected to the support portion 1b.
When the support portion 1b is pressed into the hole 2a in this state, the locking member 3 projecting from the upper surface of the recess 1b 'satisfactorily deforms the inner wall of the hole 2a (forming a pressing groove). ) To fit and lock on the inner wall,
Therefore, the tool 1 and the holder 2 can be reliably locked and connected. A mounting portion of the base 2 of the holder 2 to the automatic rotating tool 5 (for example, the electric rotating tool 5) is formed in a hexagonal cross section so as to prevent rotation. Reference numeral 2b denotes a concave groove into which the steel ball 6 is fitted when the holder 2 is mounted on the automatic rotating tool 5, and which has a retaining function (see FIG. 7). Since the present embodiment is constructed as described above, when connecting the tool 1 and the holder 2, the locking member 3 is arranged in the concave portion 1b 'provided in the support portion 1b of the tool 1, and in this state, the tool 1 is pressed into the hole 2a of the holder 2 to deform the inner wall of the hole 2a, and the locking member 3 is locked to the inner wall, so that the tool 1 and the holder 2 are firmly locked and connected. I do. By applying an adhesive as needed, the connection between the tool 1 and the holder 2 can be further strengthened. Therefore, according to the present embodiment, a firm connection between the tool 1 and the holder 2 is reliably achieved, and a strong torque can be applied to the tool 1, resulting in extremely high quality. Also, by setting the inner diameter of the hole 2a of the holder 2 to be substantially equal to the outer diameter of the support 1b of the tool 1,
After the connection between the tool 1 and the holder 2, press caulking is performed as in the second conventional method, so that the tip of the tool is displaced from the axis of the holder and the accuracy is inferiorly reduced. And extremely high accuracy. Since the hardness of the locking member 3 is set to be higher than the hardness of the inner wall of the hole 2a of the holder 2, the locking member 3
Is placed in the recess 1b 'of the support 1b.
When b is pressed into the hole 2a, the locking member 3 protruding from the upper surface of the concave portion 1b 'can satisfactorily deform the inner wall of the hole 2a and is securely locked to the inner wall. Further, since the holder body 2 is integrally formed by die casting, there is no need to perform any troublesome work of cutting the hexagonal cross section and the forming of the concave groove 2b when forming the holder 2 at all. Will excel. FIG. 8 shows a second embodiment.
This is a case where a columnar locking member 4 is employed as the locking member. The rest is the same as in the first embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory sectional view of a first conventional method. FIG. 2 is an explanatory sectional view of a second conventional method. FIG. 3 is a perspective view showing a part of a tool and a holder according to the first embodiment. FIG. 4 is an explanatory sectional view of the first embodiment. FIG. 5 is a sectional view taken along line AA of the first embodiment. FIG. 6 is a sectional view taken along line BB of the first embodiment. FIG. 7 is an explanatory diagram showing a use state of the first embodiment. FIG. 8 is an explanatory sectional view of the second embodiment. [Description of Signs] 1 Tool 1a Working part 1b Supporting part 1b 'Concave part 2 Holder 2b Concave groove 3 Locking member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23Q 3/12 B23B 31/10

Claims (1)

(57) [Claim 1] A tool having a working portion at a distal end and a supporting portion at a base end, and an inner diameter substantially equal to an outer diameter of a supporting portion of the tool.
A tool having a hole having a hole into which the supporting portion is fitted, which is press-fitted, wherein a concave portion is provided in a supporting portion of the tool, and the concave portion is provided in a protruding state from the concave portion.
Of a material harder than the hardness of the inner wall of the hole of the holder
A locking member is provided, and in a state where the locking member is arranged in the concave portion, the support portion of the tool is press-fitted into the hole of the holder.
A tool device wherein the inner wall of the hole is deformed by the stop member, and the tool and the holder are locked and connected.