JPS62271672A - Grinding tool holder - Google Patents

Abstract

PURPOSE:To make it possible to grind a spherical surface and a flat surface with the use of only a lathe, by providing a tool attaching section on a rotary shaft rotatably disposed in a cylindrical section projecting toward one end side of a shank section adapted to be removably attached to a tool holder in a lathing machine, through a self-aligning bearing. CONSTITUTION:When a tool holder 1 attched thereto with a grinding tool 3 and having its shank section 2 attached to a tool holder 12 in a lathing machine such as a lathe, is pressed against the surface 15 to be machined of a rotating workpiece 14, a rotary shaft 9 revolves relative to a cylindrical section 3 due to the difference in peripheral speed, and therefore, the workpiece 14 is ground. Further, since the grinding tool 13 is supported to a self-aligning bearing 10 so that it may oscillate slightly, during grinding of, for example, a spherical surface, even if the grinding tool axis 16 is shifted some or less from the spherical center of the spherical surface 15 to be machined, the grinding tool axis 16 is automatically extended through the center of the spherical surface to be ground when the tool holder 13 is pressed thereagainst. Accordingly with the use of one and the same tool holder 1, spherical surfaces having different spherical diameters may be ground. Thus, it is possible to grind spherical surfaces and flat surfaces by use of a lathe alone with a high degree of accuracy.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a tool holder for a grinding tool mainly used for grinding a spherical or flat surface of a workpiece.

[Conventional technology]

Conventionally, when grinding a workpiece with a grinding tool, the workpiece was previously turned into a desired shape using a lathe, etc., and then the workpiece was mounted on a grinding machine and ground.

[Problem that the invention seeks to solve]

Conventionally, a turning machine and a grinding machine were required to grind the workpiece. For this reason, there was a problem that grinding could not be performed in factories without grinders.

Therefore, an object of the present invention is to provide a grinding tool holder that can perform grinding with a turning machine such as a lathe.

[Means for solving problems]

The structure of the present invention for achieving this object will be explained using FIG. 1 corresponding to an embodiment. A cylindrical body protruding from one end side of a handle 2 that can be attached to and detached from a tool holder 12 of a turning machine. A rotary shaft 9 is rotatably provided in the portion 3.4, and a tool mounting portion 11 is provided at the tip of the rotary shaft 9 via an automatic steel core bearing 10. Axis 1 of the grinding tool 13 mounted on the tool mounting part 11
The axes of the handle 6 and the handle 2 are the same axis in surface grinding, and are at a predetermined intersecting angle in spherical grinding.

[For production]

When the tool holder l with the grinding tool 13 attached has its handle 2 attached to a turning machine, for example, a tool holder 2 of a lathe, and the grinding tool 13 is pressed against the machining surface 15 of the rotating workpiece 14, the grinding tool 13 As shown in FIG. 2, the workpiece 14 is rotated and ground due to the difference in circumferential speed of the workpiece 14.

Therefore, a workpiece that has been turned into a predetermined shape using a turning machine can be ground using the same turning machine.

゛ Furthermore, since the grinding tool holder is rotated using the difference in the circumferential speed of the workpiece, a drive device for the grinding tool holder is not required.

The grinding tool 13 is supported by an automatic steel core bearing lO and can swing slightly, so when grinding a spherical surface, for example, the grinding tool axis 1
6 is slightly deviated from the spherical center of the processed spherical surface 15, by pressing the grinding tool 13 against the processed spherical surface 15, the grinding tool axis 16 automatically passes through the center of the processed spherical surface 15. For the same reason, it is possible to grind spherical surfaces with different spherical diameters using the same grinding tool holder l.

〔Example〕

Embodiments of the present invention will be described based on the drawings. In FIG. 1, l is a grinding tool holder for spherical surface grinding, and a cylindrical body part 3 protruding from one end of the handle part 2 is inclined at a predetermined angle with respect to the handle part 2. The shaft 4 is inserted so as to be movable back and forth, and the front end surface of the intermediate shaft 4 is brought into contact with the locking part 6 at the tip of the cylinder body by a spring 5 provided at the bottom of the cylinder body part 3, and a needle bearing 7 is attached to the intermediate shaft 4. A rotating shaft 9 is rotatably supported by the needle bearing 7 and restrained from moving in the axial direction by thrust bearings 8 disposed at both ends of the needle bearing 7, and an automatic steel core bearing 10 is mounted at the tip of the rotating shaft 9. A tool mounting portion 11 is provided therebetween.

Grinding tool holder l connects its handle 2 to tool holder 1 of the lathe.
2, the shaft of the cup grindstone 13 attached to the tool mounting part ll &! ! 16 and the work rotation axis &9117 may be slightly shifted from the spherical center of the processed spherical surface 15.

When the cup grindstone 13 is pressed against the turning spherical surface 15 of the rotating workpiece 14, the cup grindstone 13 compresses the spring 5 and comes into contact with the turning spherical surface 15, but at this time, the cup grindstone axis 16 before contact is When the cup grindstone 13 is slightly deviated from the spherical center of the processing spherical surface 15, the cup grindstone 13 rotates around the bearing center of the automatic steel core bearing 10 so that the peripheral surface of the cup grindstone 13 completely contacts the processing spherical surface 15. That is, by pressing the cup grindstone 13 against the processed spherical surface 15, the cup grindstone axis 16 automatically passes through the center of the processed spherical surface 15. Furthermore, when the grindstone 13 rotates around the bearing center of the automatic steel core bearing 10, the intersection angle between the cup grindstone axis 16 and the workpiece rotation axis 17 changes, so in FIG. After grinding the processed spherical surface 15, it is pressed against a processed spherical surface 15' having a different spherical diameter, making it possible to grind the spherical surface with an intersection angle of 01.

By pressing the cup whetstone 13 against the machining spherical surface 15, the front end surface of the cup whetstone comes into full contact with the machining spherical surface, and the second
As shown in the figure, since the work 14 rotates on its own axis due to the difference in peripheral speed and grinds the machining spherical surface 15, the accuracy of spherical machining of the spherical portion is improved. Note that after grinding, a puff of a similar shape may be attached to the tool mounting portion 11 instead of the cup grindstone to perform a puff finish after grinding.

Although the explanation of this embodiment mainly concerns spherical surface grinding, grinding of a flat surface can be performed by setting the grinding wheel axis 16 parallel to the rotation axis 17 of the workpiece and pressing the cup grindstone against the machining surface of the rotating workpiece. I can do it.

〔Effect of the invention〕

As is clear from the above description, the grinding tool holder according to the present invention can be attached to a turning machine such as a lathe to perform grinding of a turned surface.
Can perform flat surface grinding.

Therefore, it is good news for factories that do not have grinders.
You can improve the machining accuracy of workpieces with your own lathe. In addition, by installing an automatic steel core bearing, by pressing the grinding tool against the processed spherical surface, the deviation between the grinding tool axis and the spherical center of the processed spherical surface is automatically corrected, and the spherical processing accuracy is improved by generating processing by rotating the grinding tool. As well as improving
Centring of the grinding tool holder becomes easy, and it becomes possible to grind spherical surfaces with different spherical diameters using the same grinding tool holder. Furthermore, since the grinding tool is rotated using the difference in circumferential speed of the work, the grinding tool holder does not require a drive device, and a compact and inexpensive grinding tool holder can be provided.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view of an embodiment of the present invention, Fig. 2 is a front view showing an example of grinding a workpiece with a cup grindstone, and Fig. 3 is an explanatory diagram of grinding a spherical surface with a slightly smaller diameter. be. 2. Handle portion, 3. Cylindrical body portion, 9. Rotating shaft, lO. Automatic steel core bearing, 11. Tool mounting portion, 12. Tool holder, 13. Grinding tool (cup grindstone).

Claims (1)

[Claims] A grinding tool in which a rotary shaft is rotatably provided on a cylindrical body protruding from one end of a handle that is attached to and detached from a tool holder of a turning machine, and a tool mounting portion is provided on this rotary shaft via an automatic steel core bearing. holder.