JPH09234655A - Taper matching jig for re-grinding taper hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a taper matching jig to easily perform the taper matching work in a short time in which the direction of a grinding wheel feed shaft with a main spindle tapered hole in performing the re-grinding of the main spindle tapered hole of a machine tool using a re-grinding machine on the machine tool. SOLUTION: A jig 1 having the same tapers 1a, 1b in a symmetrical and concentric manner on each side is inserted in a main spindle tapered hole 3a, a dial gage 22 is directed to the axis of the jig 1 in the horizontal direction through a magnet stand 21 and fitted to a forward side surface 12a of a grinding wheel spindle head 12 of a re-grinding machine loaded on a machine table 10 so as to be abutted approximately at right angles to the tapered surface 1b, and the angle in the direction of the grinding wheel feed shaft is adjusted by adjustment bolts 9, 9 until a pointer of the dial gage is constantly pointed or becomes stationary around the traverse by a feed motor 14 while a main spindle 3 is rotated. After a turning table 7 is fixed to an L-shaped base 6 by a clamp bolt in the final stage, re-traverse is performed to check that the pointer of the dial gage 22 is directed constant or stationary and complete the taper matching.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for adjusting a tilt angle of a grindstone feed shaft on a grinding machine side to a taper surface of a spindle taper hole when re-grinding a spindle taper hole of a machine tool. is there.

[0002]

2. Description of the Related Art Conventionally, if a spindle taper hole of a machine tool is worn or flawed for a long period of time and the machining accuracy is adversely affected, the taper hole is often re-ground. In this re-grinding process of the spindle taper hole, the main shaft was disassembled and removed from the machine tool and re-ground with a dedicated inner surface grinding machine, but it was very troublesome, time consuming and inefficient, so recently, it was recently put into practice. A device for re-grinding on the machine has been developed which is known from US Pat.

As shown in FIG. 7, this is a base 10 that can be installed on the table of a machine tool such as a machining center.
1. On a slide base 102 that is movably provided in the longitudinal direction of 1, a swivel table 103 that is rotatably supported around a horizontal axis is provided, and a slide base 104 that is movably provided on the swivel table 103. A wheel head 106 having a drive motor 105 is attached to the. The wheel head 106 is the turning table 1
It is possible to correspond to the horizontal main shaft 107A and the vertical main shaft 107B by swiveling 90 ° of 03, and the taper angle can be adjusted.
It is supposed to be done by.

To regrind a spindle taper hole by a traverse cut using the above-mentioned Japanese Utility Model Publication No. 4-40844, first, the traverse angle should be adjusted so that the whetstone is evenly contacted between the mouth and the back of the taper hole. That is, it is necessary to set the angle formed by the axis of the spindle in the grindstone feed axis (traverse axis) direction to half the taper angle of the spindle taper hole. For this reason, the traverse angle is finely adjusted by moving the grindstone little by little while moving in the traverse axis direction so that the sparks generated when contacting the taper hole are even at the mouth and the back.

[0005]

The fine adjustment of the traverse angle described in the prior art becomes narrower and harder to see from the mouth of the taper hole to the back, and it becomes difficult to visually confirm the spark. Therefore, skill and time are required. However, there is a problem in that it tends to be inaccurate.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to accurately and easily align the grindstone feed axis direction with the taper surface of the spindle taper hole. The present invention intends to provide a taper alignment jig that can be used.

[0007]

In order to achieve the above object, the taper hole re-grinding taper aligning jig of the present invention is capable of grinding the taper surface of the spindle taper hole when re-grinding the taper hole of the machine tool. A jig for adjusting the grindstone feed direction of the device, wherein the taper shafts having the same angle as the spindle taper hole are integrally formed in a corresponding shape so that the large diameter side is concentric and at least one of them is formed in the spindle taper hole. This is a detachable taper aligning jig for re-grinding a taper hole that performs taper alignment on the other outer periphery.

In order to align the grindstone feed axis direction of the re-grinding device with the taper surface of the spindle taper hole by using the above-mentioned taper jig, first one of the taper shafts of the taper jig is inserted into the taper hole of the spindle. , If necessary, pull in and fix with a tool lifting device. Next, attach a measuring device such as a dial gauge to the grindstone shaft head of the re-grinding device using a magnetic stand, etc., and bring the tip of the measuring shaft of the dial gauge into contact with the outer circumference of the other taper shaft of the taper alignment jig, and then grind the grindstone shaft head. While moving in the direction of the feed axis, look at the touch of the dial gauge needle and adjust the inclination angle of the grindstone feed axis until the needle stops moving.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a taper aligning jig of the present invention, and FIG. 2 is a front view of a taper aligning jig mounted on a spindle of a horizontal machining center. In FIGS. 1 and 2, a taper aligning jig (hereinafter simply referred to as a jig) 1 is integrally formed symmetrically so that two taper shaft portions 1a and 1b are concentric and adjacent to each other on the large diameter side. A known pull stud 2 for pulling up a tool is concentrically screwed to the end surface of one taper shaft portion 1a.

The taper shaft portions 1a and 1b are, for example, taper holes 3a of a spindle 3 of a machine tool corresponding to a horizontal machining center or the like.
Is formed with the same taper angle θ, at least one taper shaft portion 1a has a size (diameter D1 and length L1) that can be inserted into the main shaft taper hole 3a, and the other taper shaft portion 1b is tapered. If the angle θ is the same, the dimensions (D2, L
2) does not necessarily have to be the same (as D1 and L1).

FIG. 3 is a perspective view showing an example of a regrinding device for regrinding the spindle taper hole 3a on the machine. In FIG. 3, an L-shaped base 6 is provided for making the regrinding device 5 compatible with both a horizontal spindle and a vertical spindle, and has two outer surfaces 6a and 6b forming a vertical machining center. It is a mounting surface that is selectively brought into contact with a table (not shown) or the table 10 of a horizontal machining center described later. Further, a guide hole (not shown) is vertically formed substantially in the center of one of the inner flat surfaces 6c, and a swivel base 7 integrally having a boss portion rotatably fitted in the guide hole is provided on the flat surface 6c. Two adjust bolts 9 and 9 are mounted so that they can rotate.
It can be finely adjusted and fixed by bolts.

FIG. 4 shows a taper hole 3a of a spindle 3 which is rotatably supported by a spindle head 4 of a horizontal machining center. The taper jig 1 of the present invention is mounted on the table 10, and a re-grinding device is mounted on a table 10. FIG. 8 is an operation explanatory view showing a state where the re-grinding device 5 is taper-matched prior to the grinding process.

First, the end face 12 of the whetstone shaft head 12 on the whetstone 15 side
The minimum scale is 1/1 on the magnetic stand 21
000mm dial gauge 22 is attached, and measurement axis 2
2a is horizontal and faces the axis of the jig 1, and the taper shaft portion 1
Adjust so that it is perpendicular to the tapered surface of b.

Next, the table 10 is moved in the X-axis direction to bring the measuring shaft 22a of the dial gauge 22 into contact with the outer circumference of the taper shaft portion 1b of the jig 1, and while the main shaft 3 is rotated, the grindstone jig head is fed by the feed motor 16. Reciprocating 12 (traverse)
Let it. At this time, since the pointer of the dial gauge 22 swings, the angle of the swivel base 7 is finely adjusted by the adjustment bolt 9 until the swing of the pointer is constant before or after the traverse or stops to swing. When the deflection of the pointer is constant or stopped before and after the traverse, the inclination angle of the grindstone shaft head 12 with respect to the Z-axis is always 1/2 (θ / 2) of the taper angle of the spindle taper hole 3a. In this state, the swivel base 7 is fixed to the L-shaped base 6 and traversed again as a precaution, and after confirming that the shake is constant or stopped, the taper alignment is completed.

5 and 6 are explanatory views of the operation of re-grinding the spindle taper hole 3a. In FIG. 5, after the jig 1 is extracted from the spindle taper hole 3a, the spindle head 4 is moved toward the Z-axis direction table 10 side and the table 10 is moved in the X-axis direction so that the outer periphery of the grindstone tip portion is tapered. Gently touch the mouth of. The cutting amount of the table 10 is set based on the X-axis current value of the table 10 at this time, and the movement (traverse) distance of the grindstone shaft head 12 is set.

Next, in FIG. 6, the spindle 3 and the internal grindstone spindle 13 are simultaneously rotated to start re-polishing by traverse cutting of the spindle taper hole 3a. Then, after the grinding process is completed, a taper model (not shown) is inserted to check the contact, and if bad, the grinding process is repeated again.

[0017]

The taper adjusting jig of the present invention has a simple structure in which the same taper shaft portions are symmetrically and concentrically provided on both sides, and the jig manufacturing cost is low, and the jig is used. By doing so, it is not necessary to perform taper adjustment while watching the spark, and the time can be shortened significantly.

[Brief description of drawings]

FIG. 1 is a front view of a taper fitting jig of the present invention.

FIG. 2 is a front view showing a state in which a taper jig is attached to a horizontal spindle.

FIG. 3 is a perspective view of a regrinding apparatus.

FIG. 4 is an explanatory diagram of a taper matching operation using a dial gauge.

FIG. 5 is an explanatory diagram of a re-grinding operation and is a diagram showing a state immediately before processing.

FIG. 6 is an explanatory diagram of a re-grinding operation, which is a diagram showing a state during grinding.

FIG. 7 is a front view of a conventional regrinding apparatus.

[Explanation of symbols]

 1 Taper alignment jig 2 Pull stud 3 Spindle 3a Taper hole 5 Re-grinding device 7 Revolving base 8 Slide base 9 Adjust bolt 10 Table 11 Moving base 12 Grinding wheel head 13 Internal grinding wheel shaft 15 Grinding wheel 22 Dial gauge

Claims (1)

[Claims] 1. A jig for aligning a grindstone feed direction of a grinding device with a taper surface of a spindle taper hole when re-grinding a spindle taper hole of a machine tool, the taper shaft having the same angle as the spindle taper hole. Are concentrically and symmetrically integrally formed so that the large diameter sides are adjacent to each other, at least one of which is configured to be attachable to and detachable from the spindle tapered hole, and the taper hole re-grinding jig for tapering the outer periphery of the other one.