KR0152720B1 - Tool turret driving device for cnc lathe - Google Patents

Abstract

The present invention relates to a tool turning drive of a CNC lathe, in which a fast rotation of a turret for selecting a tool and a precise positioning of the tool are performed only by clamping of an internal piston without lifting the spindle, using a servo motor as a driving means. In the tool turning drive of the CNC lathe, which rotates the turret using the hydraulic index motor as the driving force and determines the working position of the tool installed in the turret by lifting the spindle by the piston, the servomotor at the rear of the body is driven. The main gear and the three driven gears are engaged with each other, and a positioning means portion for determining the correct working position of the tool installed in the turret by the operation of the inner peripheral surface hydraulic pressure of the third driven gear is installed. The pressurized oil flows in from the oil passage and the flow path formed through the positioning means. Clamping port, and has a port and unloading clamping, a shaft coupled with the shaft in the center of the turret and arranged from a center zone formed such that sliding engagement features.

Description

Tool Turret Drive of CNC Lathe

Figure 1 is a side cross-sectional view showing a conventional toollet drive.

Figure 2 is a side cross-sectional view showing a toollet driving device of a CNC lathe according to the present invention.

3 is an enlarged sectional view of a main portion showing an enlarged positioning means portion.

* Explanation of symbols for main parts of the drawings

10: Body 12: Servo Motor

14: main gear 15, 16, 17: 1, 2, 3 driven gear

18: turret 19: tool

20: positioning means 22: rotating member

24: fixing member 26: piston

30: center support 32,33: euro

34: clamping port 36: unclamping port

38: shaft 40: origin determination unit

50: clamp / unclamp detection unit

The present invention relates to a tool turret driving device of a CNC lathe, and more particularly, to the fastening of a turret for selecting a tool using a servo motor as a driving means and to precise positioning of the tool without the lifting of the spindle, The present invention relates to a tool turning drive of a CNC lathe to be made only by a ping operation.

As shown in FIG. 1, the toollet driving device of the conventional CNC lathe uses the hydraulic index motor 62 at the rear of the body 60 as a driving means, and the main gear 64 of the motor shaft 63; The driven gear 65 meshed with the main gear 64 and one end are axially coupled by the key groove 66 of the driven gear 65, and each tool is radially positioned at the other end to perform each operation. The turret 67 is fixed and receives the transmission power of the rotating shaft 68a and the rotating shaft 68a, which are rotated by the hydraulic index motor 62, to the front and rear operations of the piston 69 in the body 60. In order to determine the exact position of each tool of the main shaft 68 of the lifting shaft 68b coupled to the spline shaft and the turret 67 fixed to the lifting shaft 68b to enable a certain length lifting in the axial direction. Positioning unit 70, the rotating member 71 is clamped to the fixing member 72, and at one end of the rotating shaft 68a of the headstock 68 It is composed of the encoder 73 to control the rotation of the partition (67).

However, in the conventional tool turret driving apparatus, since the driving means is constituted by a hydraulic indexer, the driving force is relatively weak as well as the driving force is relatively weak compared to the servo motor to be mounted in the present invention. Due to the weight, it is difficult to rotate the turret at high speed, and thus the working time is long.

In addition, in order for the turret to be rotated, the piston in the hydraulically actuated body causes the lifting shaft of the spindle to move forward in the axial direction so that the clamped positioning portion must be switched to the unclamped state, thereby being clamped / unclamped. Problems such as durability defects and vibration in the apparatus have occurred.

Accordingly, the present invention has been made to solve the above-mentioned problems, the object of which is to rotate the front turret and the precise positioning of the tool to select the tool with the servo motor as the driving means before and after the main shaft The present invention provides a tool turning drive of a CNC lathe, which is performed by clamping operation of a piston inside a body without lifting.

In order to achieve the above object, the present invention provides a tool turning drive of a CNC lathe to rotate a turret using a hydraulic index motor as a driving force, and to determine a work position of a tool dividedly installed in the turret by lifting a spindle head by a piston. The main servo gear and the three driven gears are engaged with each other by the driving force of the servo motor at the rear of the body, and the positioning means part which determines the exact working position of the tool installed in the turret by the hydraulic action of the inner peripheral surface of the third driven gear As a center support formed on the inner circumferential surface of the positioning means portion, the flow passage formed through the positioning means portion, the clamping port into which the hydraulic oil flows from the oil tank, the unclamping port, and the shaft axially coupled to the center in the center support Has the features made up.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail based on attached drawing.

2 is a side cross-sectional view showing a tool turret driving device of a CNC lathe according to the present invention, wherein the turret is rotated using a hydraulic index motor as a driving force, and the working position of the tool dividedly installed on the turret by lifting the spindle by the piston is shown. In the tool lathe driving device of the CNC lathe, the servomotor 12 serving as the driving force of the device is provided at the rear of the body 10.

The first driven gear 15 and the first driven gear 15 are coupled to the first driven gear 15 to press-install the main gear 14 to the motor shaft 13 of the servo motor 12 and to mesh with the main gear 14. The third driven gear 16 to be interlocked with the second driven gear 16, coupled to the turret 18 on the front surface, and having a plurality of stepped portions 17a having different diameters in the inner circumferential surface thereof. Install (17). Positioning means portion 20 is installed in the inner circumferential surface of the third driven gear 17 to determine a fine and accurate working position of the tool 19 installed on the turret 18 by hydraulic operation. (20) and the clamping port (34), the unclamping port (36) into which the oil pressure from the oil tank (not shown) flows into the positioning means portion (20). The shaft 38 is axially coupled to the center of the shaft 38 is formed of a sliding support is formed of the center support (30).

On the other hand, the positioning means 20 is a rotating member 22 is fixedly coupled to the third driven gear 17 and the tooth 22a is formed at the tip and the tooth 22a of the rotary member 22 at the tip. And a fixing member 24 which is formed at the same angle as the mounting angle of the tool 19, which is always divided into the turret 18, and by hydraulic pressure at the time of positioning. The piston 26 to be engaged with each other on the rotating member 22 and the fixing member 24 is to be installed, but is configured to always engage with the fixing member 24 when clamping.

In addition, the origin determination portion 40 is formed on the opposite shaft end of the shaft 38 by the proximity switch 42 which allows the return to the initial position of the turret 18 at the initial stage of the device. will be.

In addition, between the fixing member 24 and the rotating member 22 in the lower portion of the positioning means 20 and penetrates the body 10 and is opposed to the piston 26 to the pressure by the clamping operation of the piston 26 It consists of a clamp / unclamp detection unit 50 consisting of a proximity switch 52 to detect the clamp state in conjunction with the return force by the elastic force during the unclamping operation.

It describes the operating state of the present invention configured as described above.

First, when the power of the present invention is turned ON, power is applied to the proximity switch 42 of the opposite shaft end of the turret 18 fixedly coupled to the shaft 38, and the turret is driven by the drive of the servomotor 12 by an electrical signal. The shaft 38 is rotated so that the 12 reaches the initial point.

In this state, the turret 18 is rotated so that the desired tool reaches the work position of the workpiece. The hydraulic oil from the oil tank flows into the unclamping port 36 of the central support 30, and the hydraulic oil flows in the flow path. And the clamp / unclamp detection unit 50 is moved along the 32 to release the piston 26 of the positioning means 20 from being clamped to the rotating member 22 and the fixing member 24. As the proximity switch 52 returns to its original position by the elastic force, the proximity switch 52 is moved out of the sensing position that the proximity switch 52 can detect, and the unclamping state is displayed by the light emitting display means (not shown).

Subsequently, the servomotor 12 is driven according to the programmed information, and the main gear 14 pressed into the motor shaft 13 is engaged with each other by the first, second and third driven gears 15, 16 and 17. ) And the rotating member 22 of the positioning means portion 20 fixedly coupled to the third driven gear 17, and the transmission driving force rotates the turret 18 to rotate the turret 18. Determine the tool 19 installed in the.

In the above state, the operation of fixing the turret 18 and making a fine crystal of the work tool 19 is performed. The oil pressure from the oil tank flows into the clamping port 34 of the central support 30, and the oil pressure flows into the flow path. It moves along to move the piston 26 of the positioning means part 20 to engage with the tooth 22a, 24a of the rotating member 22 and the fixing member 24.

At this time, the fixing member 24 of the positioning means portion 20 is formed so that the tooth 24a is set so that the turret 18 reaches the correct position, while the rotating member 22 is the third driven gear 17. ), Because the interlocked rotation with the turret 18 may cause a slight error in the servomotor 12 which is divided and rotated according to the input information. The error is increased by frequent rotation, and the error is eliminated by the clamping operation of the piston 26 which is always configured to face the tooth mount 24a of the fixing member 24 to prevent it.

Subsequently, when the complete clamping of the positioning means 20 is made, the proximity switch 52 of the clamp / unclamp detecting unit 50 is approached to a sensing position that can be sensed. The status will be notified to the worker.

Therefore, the present invention can expect more accurate and faster positioning and high speed rotation of the turret with such a configuration and operation, and it is more durable than the conventional invention which is clamped as lifting of the main shaft by clamp / unclamping only by the operation of the piston. The vibration does not occur and the effect is that the quiet work can be done.

Claims (5)

In a tool turning drive of a CNC lathe which causes a turret to be rotated by using a hydraulic index motor as a driving force and determines the working position of a tool installed in a turret by lifting a spindle shaft by a piston. The main gear 14 and the three driven gears 15, 16, and 17 are engaged with each other using the driving force 12, and the turret 18 is operated by the hydraulic pressure of the inner circumferential surface of the third driven gear 17. A flow path 32 formed with a positioning means portion 20 for determining the correct working position of the installed tool 19 and passing through the positioning means portion 20 inside the positioning means portion 20 ( 33) and the clamping port 34 into which pressure oil flows from the oil tank, and an unclamping port 36, and a central support 30 formed so that the shaft 38 axially coupled to the turret 18 is slidly coupled to the center thereof. CNC tool lathe tool drive, characterized in that the. According to claim 1, wherein the positioning means 20 is a rotating member 22 is fixedly coupled to the third driven gear (17) to rotate and the tooth 22a is formed at the tip, and the rotating member 22 at the tip A fixing member 24 which forms the same tooth 24a as that of the tooth 22a of the tool, and the tooth 24a is always set and fixed at the same angle as the installation angle of the tool 19 dividedly installed in the turret 18, The internal of the piston 26 to be engaged with each other to the rotating member 22 and the fixing member 24 by the hydraulic pressure, the tool of the CNC lathe characterized in that it is configured to always engage with the fixing member 24 when clamping Turret Drive. 2. The origin determination unit (40) according to claim 1, characterized in that the proximity switch (42) causes the return to the initial point of the turret (18) at the initial stage of operation of the device at the opposite end of the turret (18) of the shaft (38). Tool millet drive of the CNC lathe, characterized in that the configuration. The piston (26) according to claim 1 or 2, wherein the piston (26) penetrates the body (10) and faces the piston (26) between the fixing member (24) and the rotating member (22) below the positioning means (20). CNC, characterized in that consisting of a clamp / unclamp detection unit 50 consisting of a proximity switch 52 to detect the clamp state in conjunction with the pressure by the clamping operation and to return by elastic force during the unclamping operation Tool toollet drive on lathes. The tool turret drive of a CNC lathe according to claim 1 or 2, wherein the turret (18) performs tool positioning without lifting.