JPS60167763A - Nc oscillating traverse device - Google Patents

Abstract

PURPOSE:To simplify a device in structure as well as to improve its operatability, by installing a rocking function generator outputting a command position, which rocks a wheel spindle stock in a Z-axis direction simultaneously with its movement in the Z-axis direction, and a combined circuit outputting the command position with both rocking and Z-axis command positions. CONSTITUTION:When a grinding position and grinding width are determined by a work, machining programs and position data are given to a tape 11, then rocking strokes and frequency are inputted into a control panel 20 and stored in a data memory 21. A decoder 12 is read by a machining command, and a command position for an unrocked Z-axis is inputted from a Z-axis function generator 13. Likewise, when a rocking command is given out of the decoder 12, a rocking command position for the Z-axis is outputted by a rocking function generator 22, and these two outputs are combined at a combined circuit and inputted into a comparative amplifier 14, whereby a grinding wheel is rocked according to a speed feedback value in comparison with a position detector 17.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to an apparatus capable of imparting oscillation, traverse, or a combination thereof to a grinding wheel in an internal grinding machine.

Prior art In conventional internal grinding machines, the drive devices for oscillation and traverse are separate units, and oscillation is usually performed by rotating a cam via a drive ball screw, and the traverse pole screw is rotated in the correct direction. This was done by reversing the rotation.1. This method is a reliable method when used exclusively and there are no particular problems, but since the devices are separate, it becomes a cylinder axis and the adjustment of the oscillation scenery requires the labor of replacing the cam. It was difficult and required a lot of effort. In addition, there is an inconvenience that a fixed position stopping mechanism is required for grinding based on the table position.

Purpose The present invention has been made in view of the above, and it is an object of the present invention to provide a No. oscillating traverse device that has a simplified structure by reducing the number of parts, and improves operability by allowing oscillation adjustment to be performed on a surface layer by input. That is.

Solution: In the MO internal grinding machine, in addition to the two-axis movement of the grindstone head,
An operation panel connected to the servo motor so as to perform axial oscillation simultaneously, and for inputting the oscillation stroke and number of oscillations, a data memory for storing data from the operation panel, and a NOB p-gram tape. a rocking function generator that outputs a rocking command position based on the data in the data memory according to a rocking command from the rocker, and the rocking command position and the two-axis command position.
and a synthesis circuit that outputs a command position.

EXAMPLES Hereinafter, examples of the present invention will be described based on the drawings. A headstock 1 is mounted on the bed of a well-known internal grinding machine so as to be movable and controllable in the X-axis direction, and a main shaft having a chuck 2 fitted thereon is rotatably supported at the tip of the headstock 1. Further, a table 3 movable in the z-axis direction is placed on the bed, and a grindstone 4 is fitted onto this table 6 to rotatably support an inner grinding shaft 5 having fineness in two axial directions. 6 is mounted so as to be slidable in two axial directions, and the grindstone head 6 is screwed into a ball screw 8 horizontally supported on the table 6 through a female thread 7 provided on the lower side. The ball screw 8 is connected to a servo motor 10 provided on the table 3 via a shaft joint 9, and this servo motor 10 is connected to the N.

The table 3 is caused to perform traverse, oscillation, or a combination thereof by rotating the ball screw 8 in the forward direction, reverse direction, or back and forth in response to a command from the device. The No. 1 device is equipped with a decoder 12 for decoding data recorded on the Canadian program tape 11.
The J device includes a 2-axis function generator 16 that commands the 2-axis position by the z11illI movement command, and a comparison amplifier that compares the command position of the 2-axis with the position feedback amount, amplifies the difference, and outputs the command speed. 14. A servo amplifier 15 that inputs the output command speed and speed feedback amount to drive the two-axis servo motor 16, and a position detector 17 that is connected to the servo motor 16 and provides position and speed feedback. It is provided. In addition to the above, the present invention provides an operation panel 20 for inputting the swing stroke and number of swings into the No. 1 device, a data memory 21 for storing data from the panel. A swing function generator 22 receives a swing command from the decoder 12 and outputs a swing command position based on data in the data memory 21;
A synthesis circuit 23 is added that outputs command positions of two axes based on the output of the axis function generator 16.

In the present invention configured in this manner, when the grinding position and the grinding state are determined by the caroe material W, the necessary cutting program and position data are provided to the tape 11. Further, the conditions necessary for rocking, such as the rocking stroke and the number of rocking times, are manually input into the operation panel 20, and the data is stored in the data memory 21. The processing WW is attached to the chuck 2. 〃According to the Loe command, the decoder 12 reads the door command and value input by the tape (or MDI) and when the Z-axis movement command is given, the tape does not oscillate based on the accompanying data given to it 2/7- 1 s △ dry fence 1 ÷ l yari nn im # (7 紬萬转轻厉体 41 s ``Therefore, it is output. Also, when the oscillation command is given from the decoder 12, the oscillation stroke stored in the data memory 21 , e.g. 50 mm, number of swings e.g. 10
z where sinusoidal oscillation is performed based on the data of
The swing command position of the shaft is output from the swing function generator 22. These two outputs, ie, the Z-axis command position and the swing command position, are combined by a synthesis circuit and the command position is input to the comparator amplifier 14. Compare this input with the position feedback amount from the position detector 17, find the difference, input the command speed corresponding to the error amount to the servo amplifier 15, and position detection B! The two-axis servo motor 16 is driven according to the amount of speed feedback from the device 17, the ball screw 8 is rotated, the grindstone 4 is advanced 200 mm toward the chuck 2 in the Z-axis direction, and the number of oscillations is 10 times with the oscillation stroke 50. During this time, the necessary cutting feed is given to the headstock 1. Post-traverse oscillation or traverse oscillation can be arbitrarily selected depending on the timing at which the swing command is given.

Effects As detailed above, this Hatsurou is equipped with an attached circuit that commands and calculates the number of oscillation strokes, and is connected so that the two-axis drive of the grindstone head and the oscillation amount movement are performed by one servo motor. Therefore, the driving device becomes easy to use, the cost is reduced, the maintenance becomes easy, and the amount of oscillation can be adjusted precisely and easily. Moreover, since a fixed position stopping mechanism is no longer required during table positioning and grinding, speed can be increased.

[Brief explanation of drawings]

FIG. 1 is a drive diagram of the grindstone head, and FIG. 2 is a block diagram of the control of the whetstone head. 6... Grindstone head 8... Ball screw 1D... Servo motor 20... Operation panel 21.
...Data memory 22...Obcillation function generator 26...
Synthetic turnip *#F applicant

Claims (1)

[Claims] In a No internal grinding machine that outputs a 2-axis command position and drives a 2-axis servo motor in response to a 2-axis movement command from the NO program, the grindstone head is moved to the Z-axis and the Z-axis direction is oscillated simultaneously. an operation panel that is connected to the servo motor and inputs the swing stroke and number of swings; a data memory that stores data from the operation panel; a swing function generator that outputs a swing command position based on the command position; and a synthesis circuit that outputs a command position based on the swing command position and the two-axis command position. NO driving servo motor
Oscillating traverse device.