JPS61103720A - Control method for cutter of gear finishing machine - Google Patents

Abstract

PURPOSE:To prevent failure of a cutter by judging if there is vibration derived from impact at the time of meshing due to abnormality in the cog part of a gear being finished during approach meshing rotation before cut-in finish processing for the gear to be finished, and by retracting the cutter according to judgment. CONSTITUTION:If there is bulge due to deformation, attachment of buried splash, and abnormal undercut at the cog part of a gear 14 to be finished 14, shocks are generated during meshing rotation, and the vibration resulting therefrom is transmitted to a cutter mounting shaft 2, front bearing 5, and front wall 6 through a shaving cutter 11, and further to a vibro-sensor 7 so as to amplify the voltage change at an amplifier 8, and the outcome is sent via a vibrational signal processing circuit 9 to a vibro-signal control circuit 10 for judgment if there is any abnormal vibration. That is, the line of setting values to represent the limit of vibration which does not cause damage to the shaving cutter is previously specified, and said judgment circuit 10 judges if abnormal vibration exceeding the set value has occurred, and if yes, a signal is emitted from this circuit 10 to retract the cutter mounting shaft in a machine control mechanism 13 at a high speed, and thereby meshing with the gear to be finished 14 is released to prevent occurrence of failure.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cutter control method in a gear finishing machine for preventing damage to a gear type shaving cutter or a gear homing cutter.

(Prior art) Shaving cutters and gear homing cutters in gear finishing machines become thinner and thinner as the shape of the tooth profile of the gear becomes thinner and thinner. For example, when finishing the gear 1 to be finished with the shaving cutter 2, the shaving cutter 2, which is a tool C, frequently breaks, causing a great deal of damage, which hinders productivity and causes a lot of economic loss. It became.

For example, in order to make the gear reducer installed in an automatic TJi operate as quietly as possible, the engagement ratio of the gears is increased, the gear module is made smaller to reduce noise, and the tooth height is increased to increase the tooth profile. Has a thin (slender shape).

As a result, the teeth of the cutter, which is a finished J-shaped cutter, are thin and thin, resulting in a decrease in strength and a tendency to break.

(Problems to be Solved by the Invention) The teeth of the shaving cutter or gear homing cutter become thin and thin, and as shown in FIG. If there is an abnormality such as , adhesion of burr chips (b), or IJ abnormality (c), an impact force is generated, causing damage to the cutter 2.

<Means for Solving the Problems> The present invention uses a shaving cutter or a gear homing cutter to cut into the gear to be finished, and when the gear is rotated for close meshing before finishing, the gear is cut into the gear by the impact force at the time of engagement due to an abnormality in the teeth of the gear to be finished. This system provides a means for determining the vibrations that occur and retracting the cutter to move it away from the #A car to be finished. Gear finishing characterized by: detecting vibration occurring in the cutter while shifting the gear from low-speed meshing rotation to high-speed meshing rotation, and when abnormal vibration is detected, retracting the cutter to separate it from the gear to be finished. This is a cutter control method for processing machines.

(Function) The present invention detects vibrations transmitted to the cutter by bringing a shaving cutter or a gear homing cutter close to the gear to be finished, meshing and rotating the cutter, distinguishing the detected vibrations, and causing the cutter to regress due to abnormal vibrations to prevent damage. Gatesa Ru.

(Embodiment) An embodiment in which the present invention is applied to a gear shaving machine will be described with reference to FIGS. A vibration detector 7 was fixed to the attached front wall portion 6, and the 1-phase motion detection device 7, amplifier circuit 8, vibration signal processing circuit 9, and vibration signal discrimination circuit 10 were attached to the shaving cutter mounting shaft 4. T! A retraction command circuit 12 for a J wheel-shaped shaving cutter 11 is formed.

The vibration discrimination circuit 10 is connected to a mechanical control mechanism 13 of the gear shaving machine 3.

The vibration detector 7 detects vibration as a voltage change, and the vibration processing circuit 9 detects the voltage change detected and amplified by the vibration detector 7 as a continuous cycle.
As shown in FIG. 7, the machine control mechanism 13 moves the shaving cutter 11 to the gear 14 to be finished.
A command signal is sent to cause the robot to retreat and move away from the vehicle.

In such a device, the shaving cutter 11 is retracted as follows.

Referring to the flow sheet shown in Fig. 5, finish the tooth! $i
The cutter mounting shaft 4 with the shaving cutter 11 attached thereto is fast forwarded so that the distance between the shafts approaches [14], and the cutter mounting shaft 4 is rotated from low speed to high speed to cut the gear 14 to be finished with the shaving cutter 11. Rotate the mesh.

Deformed bulges, adhesion of burr chips, etc. on the teeth of the gear 14 to be finished,
If there are any abnormalities in the lower cut, these parts will cause impact during the #A joint rotation! i! ! Vibrations caused by this are transmitted through the shaving cutter 11 to the cutter mounting shaft 2, front bearing 5, and front wall 6, and reach the vibration detector 7, where the voltage change is amplified by the device 8, and then passed through the vibration signal processing circuit 9. Abnormal vibrations are determined by the vibration signal control circuit 10.

In other words, as shown in FIG.
The vibration signal discrimination circuit 10 determines whether or not abnormal imaging exceeding the set vibration value has occurred. The cutter mounting shaft at is rapidly retracted, and the mesh with the tooth to be finished Tl!14 is released at isolation t!:.

In this way, the shaving cutter 11 is saved from damage. For gears to be finished that have abnormal parts on the teeth, the abnormal parts are removed by appropriate means.

In the figure, 15 is a motor for rotating the shaving cutter, and 16 is a shaving cutter advancing/retracting actuator.

(Effects of the Invention) According to the present invention, when abnormal vibration occurs in the meshing operation between the cutter and the gear to be finished, the cutter immediately retracts and the gear to be finished is
Prevents breakage of the cutter by releasing the meshing operation with the middle.
Gears (L) with cutters improve work efficiency.
can be done.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram when shaving a gear to be finished with a shaving cutter, Fig. 2 is an explanatory diagram when there is an abnormal part in the teeth of the gear to be finished, and Fig. 3 is a gear shaving machine to which the present invention is applied. 4 shows the main parts of the present invention. 1 current diagram; FIG. 5 is a flow chart for explaining the present invention in detail; FIG. 6 is an explanatory diagram showing an overview of the present invention; and FIG. 7 is a diagram for explaining the state of abnormal vibration. 1.14...Gear to be finished, 2,11...Shaving cutter, 3...Gear shaving machine, 4...Cutter mounting shaft, 7...Moving detector, 8...Amplifying circuit ,9
...Vibration signal processing circuit, 10...Vibration 8 signal discrimination circuit, 12...Regression command circuit, 13...Machine R11υ1
1 mechanism. Patent application person: Isuzu OfI Co., Ltd. and tea l.

Claims (1)

[Claims] A gear-shaped cutter is fast-forwarded and moved forward to approach the gear to be finished. While the gear to be finished is shifted from low-speed meshing rotation to high-speed meshing rotation, vibrations occurring in the cutter are detected. When abnormal vibration is detected, the cutter is retracted and the gear to be finished is moved forward. A cutter control method for a gear finishing machine characterized by making the cutters more spaced apart.