JP2896554B2 - Collet holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collet holder.

[0002]

2. Description of the Related Art A collet is used for setting a required tool on a machine tool such as a lathe or a milling machine. The collet is set on a machine tool via a required holder. By the way, as the above-mentioned collet holder, there is conventionally known a collet holder in which a collet holding portion is integrally formed at a tip of a shank portion and a collet tightening nut is provided at a tip of the collet holding portion. Then, a required tool is inserted into the collet, a nut is screwed onto the collet holding portion, and the collet is tightened to securely hold the tool.

[0003]

However, when performing required machining with a machine tool such as a lathe, it is necessary to always make the center of the tool held by the collet and the center of the workpiece exactly coincident with each other. In some cases, not only cannot accurate machining be performed, but also in some cases, there is a risk of damaging the tool. For this reason, during the machining operation, necessary adjustments have been made to match the centers of the tool and the workpiece, but the collet holder has the shank portion and the collet holding portion formed integrally as described above. In addition, the adjustment work is not only troublesome and troublesome, but also requires extremely skill.

SUMMARY OF THE INVENTION The present invention is to solve the conventional problems at once, and provides a collet holder which can very easily and surely align the center of a tool and a workpiece during a machining operation. It is in.

[0005]

That is, according to the present invention, there is provided a shank member 1 having a mounting flange 2 on the outer periphery of a tip portion, and a collet holding member 3 which can be loosely fitted to the tip of the shank member 1.
And an angle adjusting plate 11 which can be freely fitted between the collet holding member 3 and the mounting flange 2, and a fixing bolt 17 for fastening the angle adjusting plate 11 and the collet holding member 3 to the mounting flange 2. joint surface of the flange 2 mounted with the angle adjusting plate 11 with one that is formed in a convex spherical surface 12, the other is formed on the concave spherical surface 13, moreover, the angle adjusting plate 11 so allowed to adjust the angle The gist of the invention is that the adjustment bolts 16 are respectively provided on the collet holding member 3 so as to adjust the misalignment.

[0006]

The angle adjusting plate 11 and the collet holding member 3 are loosely fitted to the tip of the shank member 1 sequentially, and the adjusting bolt 16
To adjust the angle to the appropriate angle by displacing the angle adjusting plate 11 and to adjust the misalignment by displacing the collet holding member 3 by the adjusting bolt 10, so that the center of the hole of the collet 21 always corresponds to the center of the corresponding workpiece 24. Can be easily and reliably matched.

An embodiment of the present invention will be described below with reference to the drawings. Numeral 1 is a hollow shank member having a circular cross section with a small diameter at the tip, 2 is a mounting flange integrally formed on the outer periphery of the tip of the shank member 1, and 3 is a cross section freely fittable at the tip of the shank member 1. Circular collet holding member, 4
Is a tapered collet holding hole formed at the tip of the collet holding member 3 along the center line thereof, 5 is a screw portion formed on the outer peripheral surface of the tip of the collet holding member 3, and 6 is the screw portion. 5 is a collet tightening nut that can be screwed onto the collet.

Reference numeral 7 denotes a flange of the same shape integrally formed at the base end of the collet holding member 3 corresponding to the mounting flange 2, and 8 denotes a flange formed at the center of the flange 7 to communicate with the collet holding hole 4. The inner diameter of the fitting hole 8 is slightly larger than the outer diameter of the shank member 1 at the front end. Reference numeral 9 denotes four screw holes formed at predetermined intervals on the outer periphery of the flange 7 so as to communicate with the fitting holes 8, and 10 denotes adjustment bolts which can be screwed into the respective screw holes 9.

[0009] 11 at an angle adjusting plate of substantially the same shape interposed freely between the flange 2 mounted with the flange 7, the bonding surface is a convex spherical surface of the angle adjusting plate 11 to be joined to the mounting flange 2 12 together are bonding surface of the mounting flange 2 to correspond to the convex spherical surface 12 is a concave spherical surface 13.
14 is a fitting hole formed in the center of the angle adjusting plate 11,
The inner diameter of the fitting hole 14 is formed to be slightly larger than the outer diameter of the tip of the shank member 1. 15 is the fitting hole 14
Four screw holes formed at predetermined intervals on the outer periphery of the angle adjusting plate 11 so as to communicate with the screw holes, 16 are adjustment bolts which can be screwed into the respective screw holes 15, and 17 is a fixing bolt. The bolt 17 can be screwed into a screw hole 20 of the mounting flange 2 through bolt insertion holes 18 and 19 formed in the flange 7 and the angle adjusting plate 11 respectively.

In addition, 21 is a slotted collet which can be freely set in the collet holding hole 4 via a required adapter, 22 is a machine tool such as a lathe, 23 is a tool, 24
Indicates a workpiece.

Next, the operation of the embodiment configured as described above will be described. First, the collet 2 is inserted into the holding hole 4 of the collet holding member 3 via a required adapter (not shown).
After the nut 1 is fitted, the nut 6 is
The collet 21 is screwed into the screw portion 5 and fixed.
Thereafter, the angle adjusting plate 11 and the collet holding member 3 are loosely fitted into the tip of the shank member 1 previously set on the machine tool 22 through the fitting holes 8 and 14 in order, and the adjusting bolt 10
.16 and fixing bolts 17 for corresponding screw holes 9.15
・ Tighten the screws lightly to 20 and temporarily fix them. Then, while measuring with a dial gauge or the like attached to the workpiece 24 holding side, the adjusting bolt 16 is appropriately screwed into the screw hole 15, and the tip of the adjusting bolt 16 is brought into contact with the outer peripheral surface of the front end of the shank member 1, and the angle adjusting plate 11 is contacted. Is displaced to adjust the angle to an appropriate angle, the adjusting bolt 10 is screwed into the screw hole 9, and the tip of the adjusting bolt 10 is brought into contact with the outer peripheral surface of the leading end of the shank member 1 to displace the collet holding member 3, thereby causing misalignment. Is adjusted appropriately so that the center of the hole of the collet 21 coincides with the center of the workpiece 24.

[0012] This again, since the bonding surface of the flange 2 mounted with the angle adjusting plate 11 are brought into spherical contact with uneven ball surface 12, 13, the angle adjustment of the angle adjusting plate 11 by the adjusting bolt 16 extremely smoothly, Moreover, it can be surely achieved. When the alignment of the collet 21 is completed, the fixing bolt 17 is inserted through the bolt insertion holes 18 and 19.
Is screwed into the screw hole 20 of the mounting flange 2, and the collet holding member 3 and the angle adjusting plate 11 are fastened to the shank member 1 to be integrally fixed.

[0013] In the above embodiments, the convex spherical surface 12 the angle adjusting plate 11, but the concave spherical surface 13 are respectively formed on the mounting flange 2, not limited to this, convex
The flange 2 mounted a spherical surface 12, in which the concave spherical surface 13 may be configured to allowed to form an angle adjustment plate 11.
Further, the collet holder according to the present invention can be applied to not only a collet for holding a tool but also a collet for holding a workpiece.

[0014]

According to the present invention, as described above, the shank member 1 having the mounting flange 2 on the outer periphery of the tip and the collet holding member 3 which can be freely fitted to the tip of the shank member 1 are provided.
And an angle adjusting plate 11 which can be freely fitted between the collet holding member 3 and the mounting flange 2, and a fixing bolt 17 for fastening the angle adjusting plate 11 and the collet holding member 3 to the mounting flange 2. joint surface of the flange 2 mounted with the angle adjusting plate 11 with one that is formed in a convex spherical surface 12, the other is formed on the concave spherical surface 13, moreover, the angle adjusting plate 11 so allowed to adjust the angle Since the adjusting bolt 16 is provided with the adjusting bolt 10 for adjusting the misalignment of the collet holding member 3, the angle adjusting plate 11 and the collet holding member 3 are sequentially loosely fitted to the tip of the shank member 1. The angle adjustment plate 11 is displaced by the adjustment bolt 16 to adjust to an appropriate angle, and
By displacing the collet holding member 3 with the adjusting bolt 10 and adjusting the misalignment, the center of the hole of the collet 21 is made coincident with the center of the corresponding work piece 24, and then the fixing is performed integrally by the fixing bolt 17. With the operation, the tool 23 and the workpiece 2 are always
4 can be used with extremely simple and reliable alignment. And especially,
Since the bonding surface of the flange 2 mounted with the angle adjusting plate 11 are contacted spherical surface due to irregularities ball <br/> surface 12, 13, the angle very freely, yet, as it can be reliably adjusted is there.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a state where the collet 21 is held.

FIG. 3 is a side view showing a use state set on a machine tool 24;

[Explanation of symbols]

1 the shank member 2 mounting flange 3 collet holding member 10 adjustment bolt 11 angle adjusting plate 12 convex spherical surface 13 concave spherical surface 16 adjustment bolt 17 fixing bolt

Claims (1)

(57) [Claims] 1. A shank member 1 having a mounting flange 2 on the outer periphery of a front end, a collet holding member 3 which can be freely fitted to the tip of the shank member 1, and a play between the collet holding member 3 and the mounting flange 2. It comprises an angle adjusting plate 11 that can be fitted, and fixing bolts 17 for fastening the angle adjusting plate 11 and the collet holding member 3 to the mounting flange 2. One of the joining surfaces of the angle adjusting plate 11 and the mounting flange 2 is one. is formed in a convex spherical surface 12, the other is formed on the concave spherical surface 13, moreover, the angle adjusting plate 11 the adjusting bolt 16 so allowed to adjust the angle, the collet retainer 3 allowed to adjust the misalignment A collet holder characterized in that adjustment bolts (10) are attached to each other.