JPS59102503A - Tool position compensator - Google Patents

Abstract

PURPOSE:To compensate a tool position in an easy manner, by supporting a tool supporting body on a spindle body rockably by means of a rockable bearing of a machine tool, while supporting the rear end with a socket which is retractable inside the spindle body and has an insertion hole bored slantly to an axial center of the spindle body. CONSTITUTION:With the fluid pressure impressed, a socket 7 is subjected to the specified displacement inside a slide cavity 9 of a spindle body 1 in the axial direction, while a fitted insertion part 6 of a supporting shaft 1 is shifted in a right angle direction by means of an axial center and a slantly fitted hole 8. And, the supporting shaft 1 rocks around an operating fulcrum 10 by forward- backward movements of the socket 7 and simultaneously with this motion, a tool supporting body 4 also rocks around the operating fulcrum 10 whereby displacement in the tool supporting body 4 takes place easily without fail and the displacement amount is controlled with certainty, thus tool positioning adjustment is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool position correction device that can correct the position of a tool attached to a machine tool, and by slightly displacing a tool support that supports the tool, It is an object of the present invention to provide a tool position correction device that can easily and accurately correct tool positions.

Traditionally, tool position correction devices have been independently developed and sold by device manufacturers in the field of machine tool technology, and their technical configuration and know-how depend on each manufacturer. It is difficult for U-D, a machine tool company, to independently develop and manufacture the tool, and each 21-day U-D has no choice but to purchase and equip an expensive tool position correction device from the manufacturer. be.

In addition, since the tool position correction device is large, the installation position is limited due to space limitations, making it difficult to incorporate into existing equipment and machinery, the structure of the correction device is complex, maintenance is not easy, and the work environment is If the correction device is installed in a machine installed in a location with poor conditions, sufficient measures and considerations should not be taken for dustproofing and waterproofing, and the correction device must be installed in a machine that is installed in a place with poor conditions. There are various drawbacks such as the lack of sufficient protective measures, and countermeasures have been desired.

The present invention has been able to overcome the above-mentioned drawbacks, and the tool support is attached to the head of a support shaft, and the support shaft is mounted in the shaft of a machine tool and is movable near the head. It is supported by the shaft body so as to be swingable by a dynamic bearing, and is removably inserted and supported at the rear end into a fitting hole formed in a socket that can move forward and backward in the axis direction within the shaft body, and the socket is fitted into the socket. The insertion hole is formed at an angle with respect to the axis of the shaft body, and the support shaft is configured to be able to swing around the operating fulcrum of the swingable bearing as the socket advances and retreats. This will be explained below with reference to embodiments shown in the drawings.

The support shaft 1 is inserted into the shaft body 2 substantially coaxially so as not to rotate. A tool support 4 is attached to the head 3 of the support shaft 1, and the support shaft 1 is connected to the shaft 2 by a swing bearing 5 attached to the shaft 2 near the head 3. The support shaft 1 is supported so as to be swingable, and a fitting part 6 is formed at the rear end of the support shaft 1, and the fitting part 6 can be inserted into and removed from a fitting hole 8 formed in a socket 7. Supported by inserting. Note that the fitting part 6 has a plurality of fitting pieces is,
is, and has a strong elastic structure in which each insertion piece 15 applies an expanding force in the direction of contacting the inner wall of the insertion hole 8, and the insertion part 6 and the insertion hole 8 are connected to each other. The structure is such that it is possible to always eliminate backlash between the two.

The socket 7 can move forward and backward in the axial direction within a sliding cavity 9 that is bored in the shaft 2 in the axial direction, without rotating, and the insertion hole 8 is slightly It is bored into the socket 7 at an angle. In the illustrated example, the insertion hole 8 is formed so that its axis is directed slightly downward toward the head 3 side of the support shaft 10.

As will be described later, the fitting part 6 has a spherical contact surface so that it can be reliably fitted into the fitting hole 8 even if the axis of the support shaft 1 swings. It is said that Although the swingable bearing 5 is a swingable taper roller bearing in the illustrated example, it may also be a thrust bearing, a radial bearing using balls or rollers, a self-aligning bearing, or a spherical bearing. If it does not need to rotate with respect to the body 2, a cylindrical surface bearing that can swing only in one direction may be used.

The center of swing of the swingable bearing 5 is defined as an operating fulcrum 10. A dustproof and waterproof cover 11 is attached to the swingable bearing 5, and a rotation stopper 12 prevents the support shelf 1 from rotating relative to the shaft body 2. In the illustrated example, the rotation stopper 12 has a serration shape, but it may be any combination that prevents the support shaft 10 from rotating relative to the shaft body 2 and allows the support shaft 10 to swing relative to the shaft body 2.

The preload body 13 applies a biasing force of preload in the axial direction so that the swingable bearing 5 can perform swing motion without always coming off, and in the illustrated example, a stacked disc is shown. , but is not limited to disc springs. The preload body 13 restricts the position of the support shaft 1 relative to the shaft body 2 in the axial direction.

The forward and backward positions of the socket } 7 are controlled in the axial direction by fluid pressure applied from the rear of the shaft body 2 . Furthermore, the socket}
7 may be advanced or retreated by means such as turning a screw, or by increasing or decreasing the fluid capacity instead of increasing or decreasing the fluid pressure.

Next, the effects of the present invention will be explained.

The fluid pressure applied to the socket 7 causes the socket 7 to undergo a predetermined displacement in the axial direction within the sliding cavity 9 of the shaft body 1 . Since a fitting hole 8 inclined with respect to the axis is formed in the socket 7, the fitting part 6 of the support shaft 1 fitted into the fitting hole 8 is aligned with the axis as the socket 7 moves back and forth. It is moved in a direction perpendicular to . In the illustrated example, when the socket 7 moves forward to the right, the insertion part 6 is displaced upward, and when the socket 7 retreats to the left, the insertion part 6 is displaced downward.

Since the support shaft 1 is supported by the shaft body 2 by the swingable bearing 5 and the socket 1, the support shaft 1 swings around the operating fulcrum 10 as the socket 7 moves back and forth. As the support shaft 1 swings, the tool support 4 attached to the head 3 of the support shaft 1 also swings around the operating fulcrum 10.

In the illustrated example, when the socket 7 moves forward to the right, the support shaft 1 rotates slightly clockwise around the operating fulcrum 10.
The tool support 4 is slightly displaced downward to the right. Tool support 4
The displacement is performed easily and reliably, and the amount of displacement is also reliably controlled.

By displacing the tool support 4, the position of the tool attached to the tool support 4 is adjusted.

The present invention has the structure described in the claims, in which a support shaft installed inside the shaft body is supported by a swingable bearing and a socket, and the support shaft is movable by moving the socket back and forth. The swing bearing is able to swing around the operating fulcrum, and by moving the socket forward and backward by a predetermined amount, the support shaft swings by a predetermined amount, and the tool support attached to the head of the support shaft is moved by a predetermined amount. This device adjusts the position of the tool attached to the tool support, and the entire mechanism is housed inside the shaft, so it can be incorporated into various machine tools and It can be used as a tool position correction device for machines, and its simple structure makes it easy to maintain.Since the operating fulcrum is maintained, tool position correction accuracy is high, and it can be manufactured at low cost. It has a high degree of freedom and can be installed in locations where it is difficult to install conventional tool position adjustment devices.A dustproof and waterproof cover is attached to the swinging bearing, preventing dust and moisture from entering. ,
By supplying and retaining an appropriate amount of lubricating oil, it is possible to obtain a sufficient lubrication effect on the insertion part, insertion hole, and other parts, resulting in various excellent effects such as stably maintaining high precision. be.

[Brief explanation of the drawing]

The drawings show axial cross-sectional views of the embodiments. 1: Support shaft, 2: Shaft/body, 3: Head, 4: Tool support,
5: Swing bearing, 7: Socket, 8: Fitting hole. -221

Claims (1)

[Claims] A tool support is attached to the head of the support shaft, the support shaft comprising:
The fitting hole is mounted in the shaft body, is swingably supported by the shaft body near the head by a swingable bearing, and is drilled in a socket at the rear end that can move forward and backward in the shaft center direction. The socket is removably inserted and supported, and the insertion hole of the socket is bored at an angle with respect to the axis of the shaft body, and the support shaft swings around the operating fulcrum of the swingable bearing as the socket moves back and forth. A tool position correction device characterized in that: