JPH0567365B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a meshing control device for a gear chamfering machine.

(Prior art) Gear chamfering machines have conventionally advanced the gear to be machined toward the chamfering cutter, positioned it by meshing with the chamfering cutter, clamped the gear to be machined, and chamfered the end face of the tooth groove with the chamfering cutter. Then, the chamfer is applied one tooth at a time to cover all the teeth.

(Problems with the Prior Art) In this conventional gear chamfering machine, when positioning the gear to be machined on the chamfering cutter, the chamfering cutter meshes with the gear to be machined in a stationary state. For this reason, the outer diameters of the chamfering cutter and the gear to be machined may collide with each other, resulting in poor meshing. In this case, the gear to be machined is retracted from the chamfering position and moved forward again to perform the meshing operation again. . Since the workpiece gear is rotatably fitted on the arbor, the workpiece gear may rotate slightly on the arbor and engage with the chamfer cutter in one remeshing operation, but the workpiece gear When the arbor did not rotate on the arbor, poor engagement occurred again, and the engagement operation often had to be repeated many times.

(Object of the Invention) An object of the present invention is to provide a chamfering cutter rotation control device for a gear chamfering machine that can achieve good engagement between a gear to be processed and a chamfering cutter in a short time by simply providing an inverter unit. There is a particular thing.

(Summary of the Invention) According to the present invention, there is provided a cutter driven by a motor, a workpiece carrier on which a workpiece gear is rotatably placed on an axis parallel to the axis of the cutter, and a workpiece carrier that is driven by a cutter. A gear chamfering machine comprising: an inverter unit for controlling the motor to rotate at a very low speed; and an operating means for advancing the workpiece carrier to a position where the cutter and the gear to be machined engage. There is provided a meshing control device for a gear chamfering machine, comprising a control means for issuing a forward command to the inverter unit and a control means for issuing a slow rotation command for the motor to the inverter unit.

(Example) Fig. 1 is a schematic front view showing a chamfer cutter of a gear chamfering machine and a work carrier that supports a workpiece gear (workpiece), and Fig. 2 shows a case where the chamfer cutter and a workpiece gear are not meshed properly. FIG. 3 is a circuit diagram showing an inverter unit provided for the drive motor of the chamfer cutter, and FIG. This is a flowchart of the meshing operation with the machined gear.

In FIG. 1, a gear to be processed (work) 10 is rotatably mounted on a work carrier 11 on an axis parallel to the axis of a cutter 20 via an arbor (not shown). The work carrier 11 is rotatably attached to a support plate 12 of a work carrier support stand 18 about a fulcrum 13, and a spring 14 pulls the work carrier 11 counterclockwise.
A limit switch 15 for checking engagement is attached to the workpiece carrier support stand 18, and its contact 16
and 17 are normally closed. The workpiece gear 10 held on the workpiece carrier support stand 18 is the cylinder 1
9 to a chamfering position, that is, a mating position with respect to the cutter 20, and then retracted to the illustrated position.

When the gear to be machined 10 is moved forward and brought to the chamfering position, the outer diameters of the gear to be machined 10 and the cutter 20 collide, as shown in FIG.
Misalignment may occur. At this time, the work carrier 11 is rotated clockwise against the action of the spring 14, and the contacts 17 and 16 of the limit switch 15 are separated. As a result, it is confirmed that there is a poor meshing, and the workpiece carrier support 18 is connected to the cylinder 19.
and then advanced again for engagement. A motor 30 that drives the cutter when the cutter 20 and the gear 10 to be processed are engaged with each other.
is controlled to rotate at a very low speed by an inverter unit 31, which will be described later. A control command to the inverter unit 31 is issued at the time of automatic engagement by a control means (not shown), and the control means also issues an operation command to the cylinder 19, which is the operation means of the work carrier.

In FIG. 3, the cutter drive motor 30 is
It is normally configured to operate on a three-phase power supply (AC200V, 50Hz). Contact 32 for forward/reverse cutter
a, 32b, 32c and cutter reversal contact 33
a, 33b, and 33c are provided between the power source and the cutter drive motor 30, and normal forward rotation and reverse rotation are performed when their contacts are closed. In the present invention, an inverter unit 31 is provided for the above-mentioned circuit, and the inverter unit 31 is configured to rotate the cutter drive motor 30 at a very slow speed (normal rotation). Inverter unit 31 is a normal thyristor inverter, 50Hz
Generates a power supply voltage with a lower frequency than the
Then, the inverter unit 31 stops the normal forward and reverse rotation of the cutter, that is, the contact 32
a to 32c and 33a to 33c are opened and the work carrier is started in a state where it is moving forward.

Next, referring to FIG. 4, the meshing operation between the cutter and the gear to be machined using the inverter unit will be explained.

When the automatic chamfering cycle starts, the control means issues a work carrier advance command to the cylinder cylinder 19 (step 1, hereinafter referred to as S1) (S1), and issues a cutter low speed rotation command to the inverter unit 31 (S2). At the same time, the cutter normally issues a forward/reverse rotation stop signal (S3). Inverter unit 31, which has received the cutter low-speed rotation command, issues a cutter low-speed forward rotation command to its control circuit (S4), and controls the motor 30 to perform low-speed forward rotation to rotate the cutter at very low speed (S5). On the other hand, the work carrier is moved forward by the cylinder 19 based on the advance command (S1) (S6). When the gear to be processed, that is, the workpiece 10 reaches the chamfering position, that is, the meshing position with the cutter 20 due to the advancement of the workpiece carrier, it is determined whether or not the meshing between the workpiece 10 and the cutter 20 is good based on the signal from the meshing confirmation limit switch 15. (S7). If the meshing confirmation limit switch 15 is turned off and there is poor meshing (S7a), the work carrier is moved backward (S8), and the process returns to (S1) again to repeat the meshing operation (S1 to S7).

If the engagement is good, the workpiece forward end confirmation limit switch (not shown) confirms that the workpiece forward end has reached the fixed position (S9), and the forward rotation command is stopped at the cutter low speed command (S10). . after that,
The workpiece 10 is clamped so as not to move (S11), and the cutter 20 is rotated normally (S12). Then, the cutter 20 cuts and chamfers the end face of the blade groove of the gear to be machined (S13). After that, a normal chamfering operation is performed.

Although the present invention has been described with respect to a gear chamfering machine, it is not limited thereto, and can also be applied to a meshing mechanism of an automatic measuring device that meshes a master gear and a workpiece, for example.

(Effects of the Invention) As explained above, the present invention provides a gear chamfering machine with an additional inverter unit that controls the rotation of the drive motor of the chamfering cutter, and performs chamfering when the gear to be processed and the chamfering cutter mesh. Since the meshing operation is performed by applying slight (low) speed rotation to the cutter, the meshing operation can be performed in an extremely short time, and at the same time, it can be easily applied to a conventional gear chamfering machine.

[Brief explanation of the drawing]

Figure 1 is a schematic front view showing a gear chamfering cutter and a work carrier that directs the gear to be machined;
The figure is a schematic front view showing a state in which the chamfer cutter and the gear to be processed are not meshed properly, FIG. 3 is a circuit diagram showing an inverter unit provided for the drive motor of the chamfer cutter, and FIG. This is a flow chart showing the meshing operation between a chamfer cutter and a gear to be machined using an inverter unit. 10... Gear to be machined (work), 11... Work carrier, 15... Limit switch for checking engagement, 20... Chamfering cutter, 30... Cutter driving motor, 31... Inverter unit.

Claims (1)

[Claims] 1 A cutter driven by a motor,
A gear chamfering machine comprising a workpiece carrier for rotatably placing a workpiece gear on an axis parallel to the axis of the cutter, and an actuating means for moving the workpiece carrier forward and backward in a direction perpendicular to the axis of the cutter,
an inverter unit that controls the motor to rotate at a very low speed; and a control means that issues a forward command to the operating means to advance the work carrier to a position where the cutter and the workpiece gear engage, and also issues a command to the inverter unit to rotate the motor at a very low speed. A meshing control device for a gear chamfering machine, comprising: