JPS6090625A - Double-axle nc gear shaper - Google Patents

Abstract

PURPOSE:To shorten preparation time and gear cutting time and reduce related man-power by conducting simultaneous gear cutting on two gears, which are on the same axis line of a work driving unit, by means of two pairs of cutter driving units located at the both sides of the gears a under the control of an NC controlling equipment. CONSTITUTION:A work 10, which is to undergo gear cutting, is mounted on a headstock 7 and rotated by a motor 11, while a cutter 18 is mounted on a tailstock 9 side and rotated by a motor 19. And turning of both are controlled for synchronization by an NC controlling equipment. When gears, doubled in different positions, are to be machine-cut, cutters 18 and 18a are controlled so that both are in a certain amount of phase-difference with each other. Next, an oscillating slider 6 is given reciprocating motion by a main motor 22 via an eccentric board 23. Rotation of the motor 22 is transmitted to a cam shaft 24, and a relief cam 25 makes a table 15, which is energized all the time, go backward, thereby accomplishing a relief to the cutter 18. Similarly, a cam 25a makes a table 15a go backward, thereby achieving a relief to the cutter 18a. Thus, double gears can be machined at the same time.

Description

[Detailed description of the invention] The present invention relates to a gear shaper for gear cutting,
It is an object of the present invention to provide a gear shaver in which two gears are simultaneously cut on the same axis of a workpiece.

For gear cutting of two-stage gears and multi-stage gears, with conventional general mechanical gear cutting machines, the workpiece cannot be cut into the chuck only when the specifications of each gear formed on the same axis of the workpiece are the same. It is possible to perform gear cutting with the same axis center - H with the same chucking installed, but if the number of teeth on each gear is different, or the gear cutting conditions are different on each gear, If the gear is a combination of a spur gear and a helical gear, it is not possible to cut the gear under the same chucking condition. Recently, numerically controlled gear cutters equipped with an NC control system C'η have been developed, and even if the gears have different specifications, each gear can be cut with the same chucking. However, at the same time, it was not possible to process two stages of gears with different gear specifications. Therefore, even with the numerically controlled gear cutting machine, the same chucking is now possible, and the setup process before gear cutting of gears with different specifications can be shortened. Regarding the productivity of the gear cutting process, the conventional mechanical gear 9
There was nothing different from the J aircraft.

In other words, the conventional gear shaper always synchronizes the rotation of the workpiece, which is the gear to be cut, and the canter, which is a pinion cutter, with the ratio of the number of teeth between the two, and reciprocates the canter or the workpiece in a direction perpendicular to the rotational direction. It is said to be a mechanism for moving gears, but in order to move gears with different specifications,
Setup time, especially cutter change time, was a major factor, and was a major factor in the gear cutting process.

The present invention is provided with a workpiece drive unit, two sets of cutter drive units, and an NC control device, and both of the ivy drive units are provided on both sides of the workpiece axis of the workpiece drive unit. , or provided on the same side, and the drive of the workpiece drive unit and both ivy drive units is controlled via the NC control device,
A two-axis NC capable of simultaneously cutting two gears on the same axis on a workpiece attached to the workpiece drive unit by the respective cutters attached to the two ivy drive units. This is a gear shaper, which shortens the setup change time by converting it to NC, and also increases productivity when machining multi-stage gears. By providing a device that performs gear cutting at the same time, it is possible to shorten both setup time and gear cutting time, and to save labor.

The configuration will be explained below with reference to embodiments shown in the drawings.

The first embodiment shown in FIGS. 1 to 4 is shown in FIGS. 6 and 71.
．． This is a gear shaper suitable for cutting two-stage spur gears as shown in N. A workpiece drive unit and a workpiece drive unit 2 are placed on a bed 1, and two sets of cutter drive units are installed on each side of the workpiece drive unit 2. 3 and 4 are installed at a constant interval so that their axes are perpendicular to the axis of the workpiece drive unit 2.

The work drive unit 2 is mounted on a work table 5 fixed on the ped 1, so as to be slidable in the axial direction of the work drive unit 2 (in the direction of double arrow A). An oscillating slider 6, a workpiece headstock 7 fixed to the oscillating slider 6
゜A tail stoke head 8, f is mounted on the off-slate sliver 6 so as to be slidable in the axial direction of the workpiece headstock 7, facing the workpiece headstock 7 (n17).
YoU R1 tail strike header 8" is fixed to the
It is composed of a tail stalk 9 that can move forward and backward on the same axis as the work headstock 7.

A workpiece 10 to be gear-cutted is attached to the workpiece headstock 7, and rotated as shown by arrow B by a workpiece drive servo motor II. If the workpiece 1o is short, it may be held in a cantilever by the workpiece headstock 7;

In the case of gear cutting of multi-stage gears as shown in FIGS. 6 to 9, the workpiece 10 is usually long in the axial direction,
Since cantilever holding only on the workpiece headstock 7 side cannot withstand the cutting resistance, it is desirable to provide a tail stock 9 for holding and clamping the other end of the workpiece 10. The other end is held.

The tail stock 9 is connected to a tail stock cylinder 12 in order to quickly and easily attach and detach the workpiece 10.
Therefore, the tail stock base 8 to which the tail stock 9 is fixed is rapidly forwarded and reversed in the axial direction, and when the workpiece 10 is attached or detached, the workpiece 'E
The structure is such that a sufficient space is maintained between the +I1 and the tail stock 9.

The tail stock 9 is provided with a work clamp rotating cylinder 13 for quickly clamping and unclamping the workpiece 10.

The cutter drive unit 3 is installed near the workpiece headstock 7 and has a cutter table 14 fixed on the bed 1. A cutter relief table 15 is mounted to be slidable in the direction of the arrow C), a radial feed table 16 is fixed on the cutter relief table 15, and a cutter relief table 15 is placed on the radial feed table 16 so as to be slidable in the direction of the double arrow C. Cutter headstock 17 freely placed
It is made up of.

The cutter 18 is attached to the tail stock 9 side of the cutter headstock 17 and is rotated by a cutter drive servo motor 19. The rotation of the cutter 18 shown by the arrow B and the rotation of the workpiece 10 shown by the arrow B are controlled by the NC control device so that they always rotate synchronously. Further, the cutter 18 is fed in the radial direction (in the direction of double arrow C in the figure) by feeding the cutter headstock 17 in the radial direction via a pole screw 21 by a radial feed motor 20.

Further, the canter drive unit 4 is provided at a position approximately symmetrical to the cutter drive unit 3 with respect to the workpiece 10, and at the same time, each is arranged at a position where the cutter drive unit 4 can cut gears on the workpiece 10,
They are said to have approximately the same configuration. That is, the cutter drive unit 4 is installed close to the tail stock 9, and is fixed to the bed 1'2.

A cutter relief table 15a, which is placed on the counter table 14a so as to be slidable in a direction perpendicular to the axes of the cutter drive unit 4 and the workpiece drive unit 2 (in the direction of double arrow E), and the force 7 relief table 15a. The cutter headstock 17a is comprised of a radial feed table 16a fixedly fixed on the radial feed table 15a, and a cutter headstock 17a mounted on the radial feed table 16a so as to be slidable in the direction of the double arrow E.

The force/cutter 18a is attached to the workpiece headstock 7 side of the force cover headstock 17a, and is connected to the cutter drive servo motor 1.
Rotation can be controlled by 9a. The rotation of the cutter 18a shown by the arrow F and the rotation of the workpiece 10 shown by the arrow B are controlled by the NC control device so that the rotations are always the same jtIJ rotation! The cutter 1 is used to cut gears that are controlled and have different phases using two-stage gears as shown in Figure 7.
8a is controlled to always maintain a constant phase difference with respect to the cutter 18.

Also, the radial direction of the cutter 18a (in the direction of the double arrow E in the figure)
The feeding is performed by feeding the cutter headstock 17a in the radial direction via the hole screw 21a by the radial feed motor 2a.

A double arrow A of the oscillator sliver 6 for performing cutting action on the cutter 18.18a and the workpiece 1o.
The reciprocating pressure movement in the direction and the relief operation of the cutter 18° 18a performed in synchronization with the reciprocating M movement are performed as follows.

As shown in FIG. 3, due to the rotation of the main motor 22 mounted on the work table 5, the
A reciprocating motion is applied to the oscillating slider 6 in the direction of the double arrow A. Also, is the L motor 220 rotations mentioned above a camshaft?
4, and by the relief cam 25 attached to the camshaft 24, the relief cam 25 direction is always
The cutter relief table 15, which has been pushed forward, is moved backward, and the relief of the cutter 18 is interlocked.

Similarly, the relief cam 25a attached to the camshaft 24 causes the force/energy relief table 1 to
5a is retracted, and a relief movement of the force/motor 18a is achieved.

As shown in FIGS. 6 and 7, the embodiment of the two-shaft NC gears configured as described above has two gears 27 and 28 which are spur gears formed close to the gear shaft 26.
It is suitable for gear cutting of step gears. For example, gears 27 and 28 have the same south-east dimensions, but gears 28 and 27 have a phase difference of a certain angle α.For a two-stage gear, the conventional manufacturing method is to The gears were stacked separately and the gears were cut together, and the gears after cutting were mounted on the gear shaft by hammering to maintain a predetermined α, and the assembly was completed. There are problems with overall machining accuracy such as maintaining the phase difference between gears, and the time required for machining is also long.The two-axis NC gear shaper of the above-mentioned embodiment was able to solve these problems. This embodiment is particularly suitable for two-stage gears where the distance g between the gears 27 and 28 is extremely small relative to the gear thicknesses tl and t2 of the gears 27 and 28, such as when machining the rotor of a two-step motor. This is effective for simultaneous gear cutting.

Integral and simultaneous gear cutting of two-stage gears consisting of spur teeth "1" with different gear specifications of the gears 27 and 28 can be performed in the same manner as described above. ,
This will be done in two steps.

Next, a second embodiment shown in FIG. 5 will be described.

A work drive unit 30 is installed on the pen 29, and two sets of cutter drive units 31 and 32 are installed on both sides of the work drive unit 30, respectively.

The workpiece driving unit 30 is provided with a workpiece headstock 33, and the workpiece 34 is gripped by the workpiece headstock 33. The workpiece headstock 33 is fixed to the bed 29. In the illustrated example, the work 34 is driven by a work drive servo motor 35 via a helical guide 36.

f, -pine-i-u logical bias Lj I÷ M thousand upper movement and 1
．． ) or 1. ) (As in the embodiment, a tail stock may be provided to hold and clamp the other end of the workpiece 34.

A workpiece 34 to be gear-cutted is attached to the workpiece headstock 33, and is driven by an arrow G by a workpiece drive servo motor 35.
It is rotated as shown.

The cutter drive unit 31 is connected to the workpiece headstock 33.
The cutter 37 is mounted on a cutter headstock 38. The cutter 37 is connected to the helical guide 4 by a cutter drive servo motor 39.
0 in the direction of arrow H. The canter headstock 38 is made slidable by a radial feed motor 41 via a pole screw 42 in the direction of the double arrow J, which is a direction perpendicular to the rotational axis of the workpiece 34, and is also moved by a main motor 43 to provide eccentric movement for oscillation. Via the plate 44, it is possible to reciprocate in the direction of the double arrow, which is the direction of the rotation axis of the workpiece 34.

The rotation of the cutter 37 shown by the arrow H, the radial feed shown by the double arrow J, and the oscillating reciprocating motion shown by the double arrow K.

It is controlled by an NC control device to always perform a predetermined synchronous movement.

Further, the cutter drive units 32 are provided at substantially symmetrical positions with respect to the workpiece 34, and are also arranged at positions where they can cut gears on the workpiece 34, and have substantially the same configuration.

That is, the canter drive unit 32 is provided with a force/vine headstock 46 to which the cutter 45 is attached, and the cutter 4
5 is rotated in the direction of the arrow by a cutter drive servo motor 47 via a helical guide 48. The cutter headstock 46 is made slidable by a radial feed motor 49 via a ball screw 50 in the direction of the double arrow M, which is a direction perpendicular to the rotational axis of the workpiece 34, and is also moved by a main motor 51 to move an oscillating eccentric plate 52. It is possible to reciprocate and interlock in the direction of the double arrow N, which is the direction of the rotation axis of the work 34, via the workpiece 34.

The rotation of the cutter 45 shown by the arrow, the radial feed shown by the double arrow M, and the oscillating reciprocating motion shown by the double arrow N are always controlled by the NC control device separately from the cutter drive unit 31. It is controlled to make a predetermined synchronous movement.

By controlling the rotation of the workpiece 34 in the direction of arrow G, the movements of the cutter 37 in the directions of arrows N, J, and N, and the movements of the cutter 45 in the directions of arrows N, N, and N, Gear cutting is not limited to the case where the stage gear is a spur gear, but also the gear cutting of a helical gear.

That is, as shown in FIGS. 9 and 10, the two-car NG gear shaper of this embodiment is suitable for cases in which the number of teeth of two gears of a two-stage or multi-stage gear is different, and the cutting conditions are changed. It is possible to simultaneously cut two teeth on the same axis, such as in the case of a combination of a spur gear and a bevel gear.

Although the helical guides 36, 40.48 are not absolutely necessary, by changing the appropriate combination of the respective helical guides 36, 40.48, a helical gear can be more easily implemented. The first embodiment can be said to be a dedicated shaver, and the second embodiment can be said to be a general-purpose shaper. Note that the main motor 43.51 of the second embodiment can be provided with a cutter relief motion in addition to the oscillation motion as in the previous embodiment. In any of the embodiments described above, any mechanism can be used in place of the surf screws 21, 21a, 42, and 50 as long as it is lightweight and has low frictional resistance.

The present invention has the configuration described in the claims, and includes a workpiece drive unit, two cutter drive units, and an NC control device, and each of the cutter drive units is connected to the workpiece drive unit. The drive of the workpiece drive unit and the double vine drive unit is controlled via the NC control device, and each of the double vine drive units attached to the double vine drive unit is provided on the side of the workpiece axis. This is a 2@NC gear shaper in which the cutter simultaneously cuts two gears on the same axis on the workpiece attached to the workpiece driving secondary 1. When cutting gears T on the multi-stage gear, Two sets of gears can be cut on the same workpiece at the same time by mounting the workpiece once, resulting in a significant improvement in productivity.The two sets of cutter drive units are each configured independently. For,
Even if the two sets of gears have different numbers of teeth, have different cutting conditions, or are of different types, such as a combination of spur gears and bevel gears, the two sets of gears on the same workpiece will It is possible to perform gear cutting at the same time, and it is particularly effective in machining when the two sets of gears have the same gear specifications and are provided with a constant pitch phase shift. By performing gear cutting by shifting the phase of the gear, it is possible to cut two gears on the same workpiece at the same time, which reduces the setup time before gear cutting and speeds up gear cutting compared to conventional manufacturing methods. 2-axis N has made it possible to shorten machining time, achieve much higher productivity than conventional machining, and also greatly improve the machining accuracy of the resulting two-stage gears.
We were able to obtain a C gear shifter.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the first embodiment, FIG. 2 is a side view of the same,
3 is a partial cross-sectional view taken along the line m--■ in FIG. 2, FIG. 4 is a partial elevational view in the direction of arrow ■ in FIG. is a side view of a two-stage gear, FIG. 7 is an elevation view of the same axial direction, FIG. 8 is a side view of another two-stage gear, and FIG. 9 is a 3-stage gear.
FIG. 3 is a side view of a step gear. 2.30: Work drive unit. 3.4, 31, 32: Cutter drive unit, 10.34
: Work, 18.18a, 37.45: Cutter. Patent applicant Kiryu Kikai Co., Ltd. Agent Osamu Kawa Kawami Yoshien Fujitatsu Mushi Figure 3 Figure 6 Figure 7 Figure 8 Figure 9

Claims (3)

[Claims] (1) A workpiece drive unit, two sets of cutter drive units, and an NC control device are provided, each of the cutter drive units being provided on a side of the workpiece axis of the workpiece drive unit, and the NC control device The drive of the workpiece drive unit and both ivy drive units is controlled through the device, and each cutter attached to the both ivy drive units simultaneously cuts the workpiece attached to the workpiece drive unit on the same axis. heart 2
2-axis NC characterized by gear cutting of two gears
gear shifter. (2) 2 as set forth in claim 1, wherein the workpiece and cutter are synchronously and synchronously driven by the NC control device.
Shaft NC gear shifter. (3) A two-axis NC gear shifter according to claim 1 or 2, wherein the two sets of cutters are driven out of phase by an NC control device.