JPS63232976A - Attachment type lapping device - Google Patents

Abstract

PURPOSE:To enable a device to perform a uniform and high accurate lapping finish, by providing a groove, which houses a tool holder forming a squared shape with its one end open, in a piston while housing it in a cylinder and adjusting a pressure of fluid to the cylinder so as to enable the depression, acting on the tool holder, to be easily changed. CONSTITUTION:A tool holder 9 is fixed to a groove 8, forming a squared shape with its one end open, of a piston 7, and it is housed in a cylinder 12 having an air pocket 13. A device, supplying pressure regulated fluid to the air pocket 13 from a fluid supply nozzle 14 and depressing by a predetermined pressure the tool holder 9 and a lapping tool 9a held by this holder 9, performs a lapping finish for a grooved surface of a workpiece 11. Further rotating a rotary plate 12 and eccentrically placing an eccentric dowel 4 and an eccentric pin 5 in an eccentric shaft 3, the tool holder 9 sometimes performs a swivel motion limited to eccentric amount.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an attachment-type lapping device that finishes lapping the grooved surface of a workpiece with high precision.

[Conventional technology]

The gasket grooves of flanges used to maintain a vacuum are required to be polished to a high degree of precision after finishing, such as by milling.

However, in the past, finishing of such grooves was generally done manually, which required a large amount of time for high-precision finishing, was extremely inefficient, and required skill.

For this reason, lapping apparatuses have also been put into practical use in which a lapping tool having a shape corresponding to the shape of the grooved surface is aligned with the grooved surface, vibration is applied to the lapping tool, and the surface is finished by lapping. FIG. 6 shows an example of such a conventional wrapping device. This wrapping device has a table 11 attached to a ball 2 so that vibrations can be absorbed on the top surface of a surface plate 21, as described in Japanese Patent Application Laid-open No. 58-12060.
2, the workpiece 10 is fixed on the upper surface of the table 11 by a fixing jig 23, and the lapping tool 1 is
The grooved surface of the workpiece 10 is lapped by applying vibration. However, this device has the disadvantage that the support 24 is deflected due to the weight of the micro-vibration imparting device attached to the support 25, making it impossible to obtain a highly accurate finished surface. Also,
Since the apparatus is large-scale, a weight 26 is used for pressurizing, and the table 11 is moved manually, it is still a manual process, making it difficult to achieve high processing efficiency.

[Problem that the invention seeks to solve]

In the above-mentioned prior art, the support 25 is deflected by the micro-vibration bag [3, and the lapping tool 9A and the grooved surface of the workpiece 10 cannot be made parallel.

In addition, the processing apparatus is large-scale, and since pressure is applied using the weight 26, it is difficult to adjust the pressure, and since the table 11 is operated by hand, automatic processing cannot be performed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an attachment-type lapping device that can be attached to a large number of machining centers and that can provide a uniform, high-precision machined surface.

[Means for solving problems]

The configuration of the attachment-type lapping device of the present invention is such that the diameter of the eccentric dowel fixed to the lower side of the eccentric shaft attached to the fixing plate of the attachment attached to the main spindle head of the machining center is the diameter of the eccentric hole provided on the lower side of the one-turn plate. The lapping device is connected to the machining center main shaft by connecting the eccentric pin provided at the lower end of the eccentric shaft through a ring at the upper end of the tool holder, and the swinging unit with the lapping tool attached to the lower end of the tool holder housed in the attachment body. In an attachment-type lapping device that is attached to a head and processes a workpiece placed on a table by applying rotational motion to the tool using a fixed plate, the tool holder is housed in the piston. The tool holder is supported by a U-shaped groove in the piston, and the piston is provided with a cylinder capable of pushing the tool holder downwardly by forcing fluid into a pocket provided at the upper end of the piston. More specifically, the pressure applied to the tool holder was kept constant by adjusting the pressure inside the pocket. moreover,
By rotating the rotating plate by a certain angle on the eccentric shaft,
The eccentricity of the tool holder can be changed.

[Effect]

(1) The attachment with a rotating plate is small and can be automatically attached to the lower end of the machining center.

Therefore, it can be used with many machining centers.
In addition, since the deflection of the tool holder and the like can be ignored, the tool holder can be cut parallel to the workpiece, so there is no need to taper when machining a flat surface.

(2) The tool holder is supported by the U-shaped groove of the piston,
The piston is supported inside the cylinder and is pushed downward by regulating and supplying fluid pressure to pockets within the cylinder. By adjusting the pressure of this fluid, a constant pressure is applied to the tool holder supported by the U-shaped groove of the piston, so that the pressure applied to the tool holder can be easily changed by adjusting the pressure.

(3) Since the eccentric shaft with the eccentric dowel and eccentric pin rotates the rotating plate around the rotating shaft and the amount of eccentricity can be adjusted, there is no need to use planetary gears etc. to create a complicated shape.

〔Example〕

Hereinafter, the present invention will be explained by examples.

FIG. 1 shows a sectional view of an attachment type wrapping device according to an embodiment of the present invention. 2 and 3 are cross-sectional views showing the process of adjusting the eccentricity of the eccentric shaft in FIG. 1. 1st
In the figure, the tool holder 9 has a lapping tool 9A,
This tool holder 9 is held by the U-shaped groove 8 of the piston 7 and is attached to the cylinder 12 via a screw I-9.

Further, the tool holder 9 is connected to the eccentric pin 5 by a ring 5A at the upper end of the tool holder 9. The eccentric pin 5 is integrated with the eccentric dowel 4 and fixed to the eccentric shaft 3. The rotary plate 2 accommodates the eccentric dowel of the eccentric shaft 3.
A groove 4 is provided at the lower end of the dowel 4, and the position of the eccentric dowel 4 can be forcibly changed by rotation of this rotary plate. The rotary plate 2 is fixed to a fixed plate 1 provided with an attachment IA, and this attachment IA can be automatically fixed to the machining center main shaft 2A. The pocket 13 stores the fluid sent from the fluid supply nozzle 14. The workpiece 1o is mounted and fixed on a machine table 11.

The operation of the attachment-type wrapping device configured in this way will be explained. The workpiece 10 is placed on the table 11 and fixed. Attachment 1-IA is automatically clamped to machining center spindle head 2A. The attachment IA and the fixed plate 1 integrally hold the eccentric shaft 3, and by rotating the rotary plate 2 connected to the fixed plate 1, the eccentric dowel 4 of the eccentric shaft 3 is eccentric and the amount of eccentricity changes. . At the same time, the eccentric pin 5 integrated with the eccentric dowel 4 is eccentric, causing the ring 5A at the upper end of the tool holder 9 to be eccentric. As a result, by imparting a rotational motion to the machining center main shaft 2A, the attachment IA also rotates at the same time, but the tool holder 9 swings by an amount of eccentricity δ, as shown in FIG.

In FIG. 3, when the rotation angle of the rotating plate is 0, the centers of the eccentric hole 6 and the eccentric ring 5a are at a point P.

It is O. FIG. 5 is a view obtained by rotating this by 90'.

As shown in FIG. 5, by rotating the rotary plate 2 by 90', the center P of the eccentric hole 6 provided in the rotary plate 2 moves to a position 61 away from the rotation axis center 0, and The center of the ring 5a connected thereto is also δ from the rotation axis center O.
It becomes a distant q. As a result, as shown in FIG. 4, the tool holder 9, which is integrated with the ring 5a, is also
The center is moved to a shifted position. Therefore, the tool holder 9
moves by an amount of δ.

Further, the tool holder 9 is fixed by a U-shaped groove 8 of a piston 7, which is housed in a cylinder 12 having an air pocket 13, into which a pressure-regulated fluid is supplied by a fluid supply nozzle 14. As a result, the tool holder 9 is pushed downward with a certain pressure. Therefore, the lapping tool 9a is also pushed downward at the same time, the pressing force necessary for lapping is obtained, and the workpiece 11 can be grooved.

According to the embodiment, the fixing plate 1 and the attachment 1a are integrated, and the tool holder 9 is attached to the lower end thereof, so that it can be attached to many machining centers, and it is possible to eliminate the deflection of the tool holder 9 etc. due to its own weight. The finishing accuracy of groove machining on the workpiece 10 is significantly improved, and
Installation will also be much easier.

Further, by automatically adjusting the amount of fluid supplied to the air pocket 13 by the fluid supply nozzle 14, the pressurization can be finely adjusted.

According to this embodiment, since the pressing force can be finely adjusted, a pressing force that matches the finishing accuracy of the machined surface can be obtained.

Furthermore, since the amount of eccentricity can be adjusted using the eccentric shaft and the rotary plate, the structure is simplified.

〔Effect of the invention〕

According to the present invention, the device can be made smaller and can be installed and used in many machining centers.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an attachment type wrapping device according to an embodiment of the present invention, FIG. 2 is a sectional view showing a state of zero eccentricity,
3 is a front view showing the position of the eccentric pin in FIG. 2, FIG. 4 is a sectional view showing the state of eccentricity δ, FIG. 5 is a front view showing the position of the eccentric pin in FIG. The figure is a side view of essential parts of a conventional wrapping device. 1a... Attachment, 1... Fixed plate, 2a...
・Machine spindle head, 2... rotating plate, 3... eccentric shaft,
4... Eccentric dowel.

Claims (1)

[Claims] 1. An attachment whose end surface is tapered, an eccentric shaft attached to a fixed plate that forcibly bends the eccentric shaft facing the fixed plate to change the amount of eccentricity, and a rotary plate attached to the tip of the eccentric shaft. The tool holder connected to the eccentric pin
An attachment-type wrapping device characterized by comprising means for pressurizing and swinging a workpiece that is pushed downward by a piston and fixed to a table top surface by the pressurizing action of a fluid whose pressure is adjusted.