JPH08267320A - Tooth profile working head of worm rack - Google Patents

Abstract

PURPOSE: To provide a tooth profile working head that is able to machine the tooth profile of a worm rack in effectively utilizing a multispindle machine tool as in the past. CONSTITUTION: This working head is provided with a transfer mechanism, transmitting the rotation of a spindle 100 of a double-housing machining center to a cutting tool 1 attached to a head body 21, an adjusting mechanism optionally capable of adjusting the radial feed of this cutting tool 1, and a tilting mechanism to tilt the cutting tool 1 to a lead angle in a work rack W, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining head capable of machining a worm rack tooth profile by utilizing a portal machining center of a machine tool.

[0002]

2. Description of the Related Art FIG. 2 shows a gantry type machining center which is capable of linearly moving in three axes of X, Y and Z. A blade 101 mounted on a spindle 100 is rotated by a motor 102 to process various works W. It was

[0003]

However, even if it is attempted to process the tooth profile Wa of the worm rack W as shown in FIGS. 3 and 4 by using such a machine, it cannot be processed.
That is, in order to process the tooth profile Wa, as shown in FIGS.
It is necessary to rotate the blade 101 having the same shape as the tooth profile Wa shown in FIG. 2 while rotating on the turning radius R with the center C of the worm rack W as a base point and to move the X axis in synchronization with the turning angle α so as to match the lead. And it is impossible. Further, since the turning radius R of the worm rack changes depending on the size, it is necessary to adjust the turning radius R according to R. Furthermore,
An angle index that matches the lead angle β of the worm rack is also required. There are various problems.

[0004]

A worm rack tooth machining head according to the present invention is a worm rack tooth machining head that is detachably attached to a spindle of a multi-axis machine tool, and the rotation of the spindle is attached to the head. Further, a transmission mechanism for transmitting the cutting tool to the cutting tool, an adjusting mechanism capable of arbitrarily adjusting the feeding of the cutting tool in the radial direction, and an inclining mechanism for inclining the cutting tool to the lead angle of the worm rack are provided.

[0005]

According to the above construction, by mounting the head as an attachment on the spindle of the multi-axis machine tool, the tool bit is swung on the turning radius from the center of the worm rack, and the tooth profile of the worm rack is machined. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a sectional view of the head portion.

As shown, the tooth profile W of the worm rack W
A cutting tool 1 for cutting a is attached to a slider 2. The cutting tool 1 is rotatable about a turning center axis (center of the worm rack W) C and is also moved in a turning radius R direction by an adjusting mechanism. It is possible.

The rotary motion of the cutting tool 1 is achieved by a transmission mechanism described later. That is, the rotational force of the main shaft 100 of the portal machining center is transmitted from the spline shaft 3 attached to the main shaft 100 to the head main shaft 6 via the bevel gears 4 and 5, and to the face plate 7 attached to the head main shaft 6. It is supported by bearings 10 and 11 provided on the central axis C of turning.

Turning radius R of the cutting tool 1 by the adjusting mechanism
In the directional movement, the rotational force of the motor 12 is transmitted to the lead screw 17 attached to the bevel gears 15 and 16 via the differential gear unit 13, the transmission shaft 14 and the bevel gears 15 and 16, and the nut meshed with the lead screw 17. 18
This is achieved by moving the slider 2 by moving the screw up and down.

The role of the differential gear unit 13 is to prevent the feed in the turning radius R direction from being applied if the motor 12 is stopped even when the head spindle 6 is rotating. It is to be able to move the head main shaft 6 in the turning radius R direction by rotating the motor 12 while the head spindle 6 is rotating or stopped.

Then, the lead angle β of the warm rack W
In order to incline the cutting tool 1 (see (b) of FIG. 4), the head main body 21 is formed so as to be pivotable with respect to the support 20 mounted on the portal machining center side with the bolt 19, and the indexing is performed. By manipulating the handle 22, the handle 20 can be swung with respect to the support 20, and an inclination corresponding to the lead angle β can be obtained. After the turning by the turning mechanism is completed, it can be fixed by the clamp bolt 23.

Further, the main spindle 100 of the portal machining center
The table feed X-axis (see Fig. 2) has a detector for detecting the amount of movement, which is generally attached to the end of each motor shaft, and NC control can synchronize rotation and feed. There is.

Because of this structure, the head body 2
1 is attached to the main shaft 100 side of the portal machining center via the support 20, whereby the bite 1 is tilted by the tilting mechanism so as to correspond to the lead angle β, and rotated by the transmission mechanism about the turning center axis C, and further adjusted. Since the feed of the turning radius R is also taken out by the mechanism, the tooth profile of the worm rack can be machined by combining the rotation of the portal machining center and the synchronous operation of the X-axis feed.

[0014]

As described above, according to the present invention, the transmission mechanism for transmitting the rotation of the spindle of the multi-axis machine tool to the cutting tool mounted on the head, and the radial feed of the cutting tool can be arbitrarily adjusted. Since the adjusting mechanism and the tilting mechanism for tilting the cutting tool to the lead angle of the worm rack are provided, it is possible to effectively use a conventional multi-axis machine tool to machine the tooth profile of the worm rack. can get.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a head portion showing an embodiment of the present invention.

FIG. 2 is a front view of a three-axis linear movement portal machining center.

FIG. 3 is a perspective view of a worm rack.

FIG. 4 is a detailed explanatory diagram of a tooth profile of a worm rack.

[Explanation of symbols]

 1 bite 2 slider 3 spline shaft 4,5 bevel gear 6 head spindle 7 face plate 10,11 bearing 12 motor 13 differential gear unit 14 transmission shaft 15,16 bevel gear 17 lead screw 18 nut 20 supporter 21 head body 22 index handle 100 spindle W work (Warm rack)

Claims (1)

[Claims] 1. A worm rack tooth machining head that is attachable to and detachable from a spindle of a multi-axis machine tool, and a transmission mechanism that transmits the rotation of the spindle to a cutting tool attached to the head, and a radial direction of the cutting tool. A tooth profile machining head for a worm rack, comprising: an adjusting mechanism capable of arbitrarily adjusting the feed and an inclining mechanism for inclining the cutting tool to a lead angle of the worm rack.