JPS59219129A - Automatic replacing device for main spindle attachment - Google Patents

Abstract

PURPOSE:To enable automatic fitting and removing of more than one attachment to and from a quill by indexing a main body by means of the rotation of a main spindle and operating a clamp ring by hydraulic pressure to connect a coupling. CONSTITUTION:A quill 3, in which a main spindle 2 having a tapered bore 2a is held axially and rotatably, is supported on the main spindle head 1 of a vertical machining center in such a way that it can be axially moved and positioned. A clamp ring 5 is slidably fitted, with an angle position which was positioned, in the cylindrical part 4a of a combined seat 4 fixed to the quill 3. A serration gear 12 is fixed to the end face of a main body 10, and a serration gear 18 is keyed to the body part of a drive shaft 15. When the main spindle 2 is rotated and the body 10 is rotated through gears 18, 12 and as pressurized oil is delivered through an oil passage 8, the clamp ring 5 is pushed up, a projected part 5b is brought in contact with a projected part 11a, and the main body 10 is fitted in the end of the quill 3.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to an automatic attachment/detachment device for various attachments such as an angular attachment fitted to the tip of a tile in a vertical machining center.

Conventional technology The attachment to the main shaft quill was generally manually tightened with a bolt, and then removed by loosening the bolt, which caused safety problems for workers.
Furthermore, it was not possible to respond to automation.

OBJECTS OF THE INVENTION The present invention provides an automatic attachment/detachment device which can automatically attach/detach various attachments, thereby making it possible to cope with safety and inefficiency, and furthermore, making it possible to automatically exchange attachment tools.

Solution: The present invention provides a vertical machining center, in which the main shaft side has a connecting member having toothed portions on the tile end face, which is slidable in the axial direction, is constantly urged downward by a spring member, and is pushed upward by hydraulic pressure when clamping. and a clamp ring having a male spline-shaped peak, and a drive shaft that is fitted onto the main shaft and rotates integrally with the main shaft and has a serration gear integrally, and a clamp ring that is rotatable with the drive shaft and rotates in the axial direction. The drive shaft is supported in the center so as to be movable by a certain amount, and has a coupling part that meshes with the toothed part of the coupling member on the end surface on the main shaft side. It is made up of a main body having a serration gear which has a male spline-shaped crest with a width that does not interfere, and which is normally engaged with the serration gear and is disengaged when the attachment is fitted onto the main shaft. be.

Example Embodiments of the present invention will be described below based on the drawings.

A quill 3, which rotatably supports a main shaft 2 having a tapered hole 2a, is supported on a main shaft head 1 of a vertical engraving machining center so as to be movable and positionable in the axial direction.

A coupling ratio 4 having a cylindrical portion 4& that also serves as a bearing holder is fixed on the end face of the quill 3, and a clamp ring 5 is slidably fitted into the cylindrical portion 4a at a predetermined angular position. . This clamp ring 5 has a cylindrical portion 5a having a male spline-like peak portion 5bF at its outer edge, and has a coupling ratio of 4 so as to form an oil-tight space between the cylindrical portion 4a and the cylindrical portion 5a. A lid 6 is fixed to the cylindrical portion 4a.

The clamp ring 5 is always urged downward by a spring 7 inserted between the coupling ratio 4 and the clamp ring 5, and an oil passage 8 is opened in the space, and pressurized oil is sent to the clamp ring 5 during clamping. is pushed up. Further, in the coupling ratio 4, a car pick coupling 9 is fixed to the outside of the clamp ring 5, which also serves as a guide for the ring 5. The attachment that fits onto the quill 3 has a female spline-shaped peak 11a on the end face of the cylindrical main body 1o, which is wide enough to pass through and not interfere with the peak 5b of the clamp ring 5 when a drive shaft (to be described later) is attached to the main shaft. With serration gear 12
A car pick coupling 11 is fixed to the car pick coupling 9 and meshes with the car pick coupling 9. Further, in the hollow portion of the main body 10, a gear cylinder 14 having a female spline 14a on a bearing 16 and a bevel gear 14b for rotation transmission on a lower end face is supported so as not to move in the axial direction. A male spline isa'ft that fits into this female spline 14a
The drive shaft 15, which is inserted through the gear barrel 14 so that it can be rotated and moved in the axial direction, has a taper shank 15b and a pull stud 15c that fit into the tapered hole 2a of the main shaft 2 at its tip, and a gear barrel at the other end. The receiving plate 19 engages with the stepped portion 140 of 14.
is fixed so that the main body 10 can be hung down, and the gear cylinder 1
A compression spring 17 is interposed between 4 and a stop plate 16 fixed thereto. The body of the drive shaft 15 has a serration gear 18 that engages with the serrations 12 that are integral with the main body 10 and disengages when the main body 10 is fitted onto the tile B. It is worn.

Attachments to be formed like this are stored vertically in a vertically movable attachment magazine (not shown) of the machining center with the curvic coupling side facing upwards and at an angular position where the ridges 11& do not interfere with the ridges 5b of the clamp ring 5. The drive shaft 15 is pushed upward by the force of the compression spring 17, and the serration gears 12 and 18 are in mesh.

On the other hand, the clamp ring 5 of the quill 6 is pressed down by the force of the spring 7. Now, in order to attach the attachment, the spindle head 1 is positioned above the attachment magazine according to a command. The quill 6 is lowered or the magazine is raised, and the tapered shank 15b of the drive shaft 15 of the attachment is fitted into the tapered hole 2a of the main shaft 2, and the drawbar (not shown) is inserted into the tapered hole 2a of the main shaft 2.
When the pull start 15C is pulled up and installed, the quill 3 is raised or the magazine is lowered, and the attachment body 10 is lowered by its own weight and the force of the spring 17, and is suspended by the receiving plate 19 of the drive shaft 15. . At this time, the peaks 11& of the coupling 110 pass between the valleys of the peaks 5b of the clamp ring 5 and are placed in a position where they do not interfere. Next, the main shaft 2 is rotated to rotate the main body 10 via the serration gears 18 and 12, and the peaks 11a and the peaks 5a of the clamp ring 5 are changed! - index to a position where the curvic couplings 9 and 11 mesh. Then, when pressurized oil is sent to the oil passage 8, the clamp ring 5 is pushed up, the crest 5b comes into contact with the ridge 11a of the clamp ring 11, and the curvic coupling 9°11 engages with the quill 6 end. is fitted. As the main body 10 rises, the serration gear 12.degree. 1B is disengaged, and the rotation of the main shaft 2 is transmitted to the gear cylinder 14 as rotation of the drive shaft 15 without any problem.

The rotation of the bevel gear 14b rotates a connected horizontal shaft (not shown) or the like.

To remove the attachment, the spindle head 1 is positioned on the magazine, the spindle 2 is indexed to a predetermined angular position, the pressure oil in the oil passage 8 is set on the discharge side, and the clamp ring 5 is pushed down by the force of the spring 7. The main body 1o removes the coupling by its own weight and the force of the spring 17, and the serration gears 12 and 18 are engaged with each other.
Then, rotate the main shaft 2 to connect the crest 11a and the clamp ring 5.
It is indexed at an angle that does not interfere with the peak portion 5b. When the quill 3 is lowered or the magazine 2 is raised to receive the main body 10, and the pulling force of the drive shaft 15 is removed and the Taber fitting is removed, the mountain portion 1
1a passes between the peaks 5b and is stored in the magazine.

If necessary, one spindle head can be positioned on another γ-touchment and automatically attached and detached in the same manner. Further, when an attachment having a horizontal axis is attached, it is of course possible to change the tool using a known tool changing device in two directions, horizontal and vertical. If necessary, the curvic coupling gear may be provided with a cover that can be automatically attached and detached to protect the teeth. Furthermore, it is also possible to index the attachment at an arbitrary angle such as 45' or 90° in the horizontal plane with respect to the spindle head.

Effects As detailed above, the present invention is provided with a camp ring and a pulling clamp ring at the end of the quill, and a camp ring and a pull-up clamp ring are provided on the main body of the attachment, which supports a drive shaft fitted to the main shaft so as to be rotatable and movable by a predetermined amount in the axial direction. The crest that engages with the clamp ring also has an angle indexing serration gear, so that the main body is indexed by the rotation of the main shaft, and the clamp ring is actuated by hydraulic pressure to join the clamp rings, so multiple attachments can be connected. This makes it possible to automatically attach and detach the tiles, and in combination with tool conversion, it is possible to achieve a wide range of automation, which has great effects in terms of time savings and safety measures.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the present invention. 2... Main shaft 6... Quill 5... Clamp ring 5b... Mountain part 8... Oil path 9.11-
...Curvic coupling 10...Main body 11a
...Mountain part 12.18...Serration gear
14...Gear cylinder 15...Drive shaft patent applicant Okuma Iron Works Co., Ltd. Agent Patent attorney Yumi Kato

Claims (1)

[Claims] (1) In a vertical machining center, on the main shaft side, there is a connecting member that has teeth on the end surface of the tile, and a male member that is slidable in the axial direction and is constantly urged downward by a spring member and is pushed upward by hydraulic pressure when clamping. A clamp ring having a spline-shaped peak is provided, and a drive shaft that is fitted onto the main shaft and rotates integrally with the main shaft and has a serration gear integrally, and a drive shaft that can rotate the drive shaft by a certain amount in the axial direction. The drive shaft is movably supported in the center and has a coupling part on the end surface of the main shaft that meshes with the toothed part of the coupling member, and has a width that passes through the peak of the clamp ring and does not interfere with the peak when the drive shaft is attached to the main shaft. A main shaft attachment comprising: a main body having a serration gear that normally meshes with the serration gear and is disengaged when the attachment is fitted onto the main shaft; Automatic attachment/detachment device.