JPS62176703A - Boring device provided with beveling tool - Google Patents

Abstract

PURPOSE:To bevel a workpiece having different boring depths without changing tools by providing a first beveling tool behind a quill and locating a second beveling tool for beveling at the boring tool side in a workpiece working position or an interference-free position by the forward and backward movement of an operating shaft. CONSTITUTION:In the case of a workpiece W having a shallow boring depth, a second operating shaft 14 is moved forward by a cylinder 15 and a rotary holder 17 is rotated counterclockwise so that the mouth portion is beveled by a second beveling tool 19 at the neighborhood of forward and end of a shaft head 10. Then, a first beveling tool 21 does not bevel since it is behind the tool 19. In the case of a workpiece having a deeper boring depth, the second cylinder 15 is operated to move the operating shaft 14 backward. Thus, the rotary holder 17 is rotated clockwise to release the tool 19 from a working position. Thus, a workpiece Wa can be beveled by the first beveling tool 21 without being interfered with the tool 19.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a boring device equipped with a chamfering tool that performs boring and chamfering simultaneously.

<Prior Art> When boring the bore of a cylinder block, it is necessary to obtain concentricity between the position of the chamfer at the mouth of the bore and the position of the hole in the bore, so that the chamfering of the mouth and the drilling are performed at the same time. For this purpose, a boring tool with a boring tool and a chamfering tool installed spaced apart by the boring depth is used, and this boring tool is advanced toward the cylinder block while rotating.
Immediately before reaching the forward end, the mouth is chamfered at the same time as boring, and then the boring tool is released inward and the boring tool is retreated.

<Problems to be Solved by the Invention> In the above example, there is no problem if one type of cylinder block is flowing into the machine, but if the cylinder blocks are of different heights and there is a protrusion A at the end of the bore. In some cases, especially when boring and chamfering a V-type multi-cylinder engine block, changing the forward end position of the boring spindle in order to chamfer the mouths of cylinder blocks of different heights using the same chamfering tool is This is not possible because the tip of the quill or the boring tool interferes with the protrusion A.

For this reason, in the past, it was necessary to install a separate machine equipped with boring tools with different distances between the boring tool and the chamfering tool, which posed the problem of increasing machine space and increasing costs.

Means for Solving the Problems> The present invention has been made to solve the above-mentioned problems, and includes a boring tool provided at the front of the quill and a first chamfering tool provided at the rear of the quill. In addition to fixing this first
A second chamfering tool which performs chamfering on the boring tool side with respect to the chamfering tool is provided so that it can be moved to a processing position or a position where it does not interfere with the workpiece by moving the operating shaft forward and backward.

<Function> With the above-described configuration, for a workpiece with a shallow boring depth, the operating shaft is operated to position the second chamfering tool at the processing position, and the boring tool is used to perform boring processing. Perform chamfering using the chamfering tool No. 2. When a workpiece with a deep boring depth comes to the workpiece, move the second chamfering tool to a position where it will not interfere with the workpiece, and use the boring tool to perform the boring while simultaneously chamfering with the first chamfering tool. .

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

In FIG. 1, lO is a shaft head, and a spindle 11 is rotatably supported on this shaft head 10.

A quill 12 is attached to the tip of the spindle 11, and the spindle 11 and the quill 12 are rotated by a motor 13.

A second operating shaft 14 is supported on the spindle 11 so as to be able to move forward and backward in the axial direction while being prevented from rotating, and a second cylinder device (drive device) 15 is connected to the rear end of the second operating shaft 14. . A concave portion 16 is formed at the tip of the second operating shaft 14, and a convex portion 18 of a rotary holder 17 is engaged with this concave portion 16.

The rotary holder 17 is rotatably supported at the rear of the quill 12 about an axis perpendicular to the rotational axis of the spindle 11, and has a second chamfering tool 19 fixed to one end.

A contact portion 20 is formed at the other end of the rotary holder 17 to abut against the quill 12 in order to prevent the rotary holder 17 from rotating counterclockwise beyond a predetermined angle. A first chamfering tool 21 is fixed to the quill 12 on the rear side of the second chamfering tool 19.

The second actuation shaft 14 and the quill 12 have a first actuation shaft 3
0 is prevented from rotating and is supported so as to be movable in the axial direction, and the first
A first cylinder device 31 is connected to the rear end of the operating shaft 30 . A taper 32 is formed at the tip of the first operating shaft 30, and one end of a movable bottle 33 is in contact with this taper 32. This movable bottle 33 is held at the tip of the quill 12 so as to be movable in the radial direction, and the other end of the movable bottle 33 comes into contact with a bite holder 34. One end of the bite holder 34 is attached to the quill 12, and the other end is movable in the radial direction.

A finishing boring bit 35 is attached to the other end. A semi-finishing boring bit 36 is fixed to the quill 12 on the opposite side to the finishing boring bit 35 slightly closer to the second chamfering bit 19.

The axis fiflO has an axis ' parallel to the axis of the spindle 11.
A shaft head cylinder device 37 for advancing and retracting g10 is connected, and a cylinder block W is connected to the side where the shaft head 10 is advanced.
is loaded and unloaded. In the figure, a two-dot chain line indicates a cylinder block Wa having a deep boring depth.

Next, the operation will be explained based on the above-described configuration. When the cylinder block W having a shallow boring depth is loaded, the second cylinder device 15 is activated and the second operating shaft 1 is activated.
4 moves forward. As the second operating shaft 14 moves forward, the rotary holder 17 rotates counterclockwise, and the contact portion 20 is pressed against the quill 12 . In this state, the spindle 11 is rotated by the motor 13, and the shaft head 10 is advanced by the shaft head cylinder device 37. As a result, first, semi-finishing boring is performed using the semi-finishing boring tool 36, and the mouth of the bore is also chamfered near the forward end of the shaft head 10 using the second chamfering tool 19. At this time, the first
Since the chamfering tool 21 is located on the rear side of the second chamfering tool 19, the opening is not chamfered.

When the forward end of the shaft head 10 is confirmed, the first cylinder device 3
1 operates and the first operating shaft 30 moves backward.

As a result, the finishing boring bit 35 is pushed out, and by retracting the quill 12 while rotating in this state, the finishing boring bit 35 performs finishing boring of the bore. When the retreating end of the shaft head 10 is confirmed, the first operating shaft 30 moves forward to move the finishing boring tool 3
5 is released and the rotation of the spindle 11 is stopped. Next, when the cylinder block Wa having a deep boring depth is loaded, the second cylinder device 15 is activated by the workpiece discrimination signal, and the second operating shaft 14 is moved backward. As a result, the rotary holder 17 rotates clockwise, and the second chamfering tool 19 is released from the machining position. When the spindle 11 is rotated and moved forward in such a state, semi-finishing boring is first performed by the semi-finishing boring tool 36, and the first chamfering tool 2 is moved near the forward end of the shaft head lO.
1 also chamfers the mouth of the bore. At this time, the second chamfering tool 19 is moved together with the rotary holder 17 to a position where it does not interfere with the cylinder block Wa. Shaft head 1
When the forward end of 0 is confirmed, the finishing boring bit 35 is pushed out, and by retracting the quill 12 while rotating in this state, the finishing boring bit 35 performs finishing boring of the bore. Quill 1 like this
By fixing the first chamfering tool 1-21 to 2 and providing the second chamfering tool 19 that can chamfer the mouth or release the opening in front of the first chamfering tool 21, it is possible to drill the center with one boring tool. Capable of chamfering and boring the mouth of two types of cylinder blocks with different depths.

The present invention is not limited to the embodiment described above, but as shown in FIG. It is also possible to take it to

<Effects of the Invention> As described above, in the present invention, a boring tool is provided at the front part of the quill, and the rear part of the quill fixes the first chamfer and rivet, and also provides a boring tool for the first chamfer tool. The second chamfering tool, which performs chamfering on the boring tool side, is provided so that it can be moved to the processing position or a position where it does not interfere with the workpiece by moving the operating shaft forward and backward, so that chamfering can be performed at the same time as hole drilling. Moreover, two types of workpieces with different boring depths can be machined with one machine, which has the advantage of reducing machine space and cost.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a cross-sectional view of a boring device, and FIG. 2 is a cross-sectional view of a boring device that is another embodiment. 10... Shaft head, 11... Spindle, 12... Quill, 14... Second operating shaft, 19°42... Second
chamfering tool, 21...first chamfering tool, 30
...first operating axis, 35...boring tool during finishing stage, 36...boring tool during semi-finishing stage, W, Wa...
Cylinder block.

Claims (3)

[Claims] (1) A spindle is rotatably supported on a shaft head that moves forward and backward relative to the workpiece, a quill is fixed to the tip of the spindle, and an operating shaft is inserted into the main shaft and the quill so that it can move forward and backward in the axial direction. A driving device is provided for moving the operating shaft forward and backward, a boring tool is provided at the front of the quill, a first chamfering tool is fixed to the rear of the quill, and a drive device is provided for moving the operating shaft forward and backward. A boring machine equipped with a chamfering tool, which is provided so that a second chamfering tool that performs chamfering on the boring tool side can be moved to a processing position or a position where it does not interfere with the workpiece by advancing and retracting the operating shaft. . (2) A boring device equipped with a chamfering tool according to claim 1, wherein the boring tool is fixed to the front part of a quill. (3) A boring device equipped with a chamfering tool according to claim 1, wherein the boring tool is provided movably in the radial direction at the front part of the quill.