JPH0683201U - NC control facing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] In a facing device, there is no need to adjust a stopper, and it is possible to correct thermal deformation of the tool post feed shaft to improve the processing accuracy. [Structure] A clamp part 24 that is movable in the axial direction at the rear end of the tool post feed shaft 4 and can be fixed at an arbitrary position, and a motor 15 that gives a rotary motion of a rotation amount corresponding to a machining feed amount by NC control, Machining the tool rest 3 by forcibly moving the feed screw shaft 34 and the feed screw nut that convert the rotational motion of the motor 15 into a linear motion in the machining feed direction and transmit it to the clamp portion 24, and the tool post feed shaft 4. The structure is provided with a hydraulic cylinder 39 that abuts the stopper 18 at the origin position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to thermal deformation correction of a tool post feed shaft of an NC control facing processing device.

[0002]

[Prior art]

 A conventional facing processing device is provided with a spindle rotatably supported by its base, and a tool rest is provided on a head of this spindle through a T-shaped groove or a dovetail groove so as to be slidable in a diametrical direction. A turret feed shaft is provided inside, and the turret feed shaft moves in the axial direction by screwing a feed screw nut and a feed screw shaft, and this movement amount is controlled by a motor.

A rack formed on the front end of the spindle, a pinion provided on the head of the spindle, and a rack provided on the tool rest are in mesh with each other, and the tool rest moves in the diameter direction of the spindle according to the movement amount of the spindle. It has a sliding structure.

[0004]

[Problems to be solved by the device]

 However, in the above facing machining device, stoppers for restricting the sliding of the tool rest are provided at both ends of the T-shaped groove, and the stoppers have a structure for improving machining accuracy. Therefore, various kinds of workpiece diameters or surfaces can be machined. When doing so, the stopper has to be adjusted every time, which takes time to adjust and the workability of the adjustment work deteriorates.

Further, when trying to determine the feed amount without using a stopper, if the tool post feed shaft expands and contracts due to thermal deformation, the feed amount of the tool post also changes accordingly, resulting in a decrease in machining accuracy. There was a problem.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention has been made in view of the above problems, and its purpose is to eliminate the adjustment of the stopper and improve the workability of the adjustment work. To provide a processing device.

[0007] Another object of the present invention is to provide a NC control facing processing device which enables correction of a new problem associated with NC control, that is, thermal deformation of a tool post feed shaft, and improves processing accuracy. Especially.

[0008]

[Means for Solving the Problems]

 The configuration of the present invention that achieves the above-mentioned object is to give a machining rotation to the tool rest at the tip of the spindle by rotating the spindle, and to move the tool post feed shaft in the spindle in the axial direction from the machining origin position to the spindle. In the NC control facing machine that gives the cutting feed in the diametrical direction, the clamp part that can move in the axial direction at the rear end of the tool post feed shaft and can be fixed at any position, and the rotation amount that corresponds to the machining feed amount The motor that gives the motion, the feed screw shaft and the feed screw nut that convert the rotational motion of this motor to linear motion in the machining feed direction and transmit it to the clamp part, and the tool post by forcibly moving the tool post feed shaft. Is provided with a driving means for bringing the stopper into contact with the stopper at the processing origin position.

[0009]

[Action]

 Since the machining origin of the turret and the feed origin of the motor can be matched and the machining feed amount in the diametrical direction of the turret can be arbitrarily set by NC control of the motor, it is possible to handle various work diameters or work surfaces. It is possible to improve the workability of the adjustment work by eliminating the adjustment of the stopper which has been a problem in the conventional example.

Further, when correcting the thermal deformation of the tool post feed shaft, the clamp part is brought into an unclamped state, and the tool post feed shaft is moved by the drive means to bring the tool post into contact with the stopper at the machining origin position, and at the same time, to operate the motor. After setting the feed origin, set the clamp part in the clamped state so that the machining origin of the tool rest and the feed origin of the motor match. Since such thermal deformation correction of the tool post feed shaft can be performed for each machining, the influence of thermal deformation can be eliminated and the machining accuracy can be improved.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 4, the NC control facing machining device 1 applies machining rotation to the tool rest 3 at the tip of the spindle 2 by rotation of the spindle 2 and feeds the tool rest inside the hollow spindle 2. By the movement of the shaft 4 in the axial direction, the tool rest 3 is provided with a cutting feed in the diametrical direction of the spindle 2 from the machining origin position.

The spindle 2 is rotatably supported in a housing 7 on a base 5 via front and rear bearings 6, and the rear end of the spindle 2 is provided with gears 10, 11 and 12 in a gear case 46. The motor 13 is connected. A head 16 is provided at the tip of the spindle 2, and a tool post 3 is provided in the front of the head 16 via a T-shaped groove 17 so as to be slidable in the diametrical direction. 47 is detachably attached. A stopper 19 is provided at one end of the T-shaped groove 17 for setting the machining origin position, and a stopper 18 for regulating the feed amount is provided at the other end of the T-shaped groove 17.

A pinion 20 is rotatably supported by the head 16, and a rack 21 that meshes with one side of the pinion 20 is provided at the tip of the tool rest feed shaft 4 along the axial direction, and on the other side of the pinion 20. An engaging rack 22 is provided on the tool rest 3 along the diametrical direction.

A clamp part 24 is provided behind the base 5 so as to be movable in the axial direction of the tool post feed shaft 4 via a guide 25, and the clamp part 24 is moved in the axial direction at the rear end of the tool post feed shaft 4. It has a structure that can be freely fixed at any position. The guide 25 comprises a rail 27 and a slider 28 that slides on the rail 27, and a clamp cylinder 29 is rotatably installed in the housing 14 fixed to the slider 28 via a bearing 8.

A hydraulic chamber 31 is formed between the clamp cylinder 29 and the clamp sleeve 30 fitted in the clamp cylinder 29. The hydraulic pressure supplied from the supply port 32 to the hydraulic chamber 31 through the hydraulic passage 33 causes the clamp sleeve 31 to move. 30 elastically deforms in the diameter reducing direction and clamps the tool post feed shaft 4. When the clamp part 24 is unclamped, the tool post feed shaft 4 is biased by the spring 23 in the direction of feeding the tool post 3, that is, the tool post 3.

A motor 15 is provided in the gear case 46, and this motor 15 gives the tool post feed shaft 4 a rotational movement of a rotation amount corresponding to the machining feed amount. A feed screw shaft 34 and a feed screw nut 35, which are converted into the linear motion of the above and are transmitted to the clamp portion 24, are provided.

The feed screw shaft 34 is rotatably provided in the gear case 46 via the bearing 9, and extends in parallel to the axial direction of the tool post feed shaft 4, and the feed screw shaft 34 has a gear 36 in the gear case 46. , 37 are connected to the motor 15, and a feed screw nut 35 screwed into the feed screw shaft 34 is connected to the housing 14 of the clamp portion 24 via a connecting portion 38. Like the guide 25, the connecting portion 38 is supported by the guide 26 so as to be movable along the feed screw shaft 34 on the base 5.

A hydraulic cylinder 39 as a driving means is provided in the gear case 46, and the hydraulic cylinder 39 brings the tool rest 3 into contact with the stopper 18 at the processing origin position by the forced movement of the tool rest feed shaft 4. Has become. A lever 41 connected to the piston rod 40 of the hydraulic cylinder 39 is supported by a support bracket 42 by a pin 43, and a hook portion 44 is formed at the lower end of the lever 41. The hook portion 44 is adapted to engage with a hooked portion 45 provided at the rear end of the tool post feed shaft 4.

Next, the operation of this embodiment will be described. When performing the facing process, first, the work 48 is set, and the tool 47 is attached to the tool rest 3 so as to face the work 48. During machining, the tool 47 is rotated around the center line of the work 48, and a predetermined amount of cutting feed is given to the tool 47 by NC control of the motor 15 to perform facing machining. Here, if the cutting feed amount of the motor 15 is adjusted, the cutting feed amount in the radial direction of the tool rest 3 can be applied to various work diameters or work surfaces, and the adjustment of the stopper which has been a problem in the conventional example. Can be eliminated and the workability of adjustment work can be improved.

When the tool post feed shaft 4 extends in the axial direction due to the generation of heat during processing, the extension is added as the feed of the tool post 3, and as a result, the feed amount of the tool post 3 is increased regardless of accurate NC control. Thermal error occurs. Therefore, when the thermal deformation, that is, the elongation of the tool post feed shaft 4 in the axial direction is to be corrected, first, the clamp part 24 is unclamped, and the tool post feed shaft 4 is forcibly retracted by the hydraulic cylinder 39. 3 is brought into contact with the stopper 19 at the processing origin position. Next, after setting the motor 15 at the feed origin, the clamping portion 24 is clamped to match the machining origin of the tool rest 3 with the feed origin of the motor 15. Since such thermal deformation correction of the tool post feed shaft 4 can be performed for each machining, it is possible to eliminate the influence of thermal deformation and improve the machining accuracy.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and various modifications can of course be made. For example, in the above-described embodiment, the case where the hydraulic cylinder is provided as the driving means has been described, but the present invention is not limited to this, and an pneumatic cylinder is provided instead of the hydraulic cylinder, or a motor, a feed screw shaft and a feed screw nut are used for driving. Means can also be configured.

[0023]

[Effect of device]

 The present invention provides the following unique effects.

That is, at the rear end of the tool post feed shaft, the clamp part that is movable in the axial direction and can be fixed at any position, the motor that gives the rotational movement of the rotation amount corresponding to the machining feed amount, and the motor Converts rotational motion into linear motion in the machining feed direction and transmits it to the clamp section. The feed screw shaft and feed screw nut and the tool post feed shaft are forcibly moved to bring the tool post into contact with the stopper at the machining origin position. It has a structure including a driving means.

Therefore, the machining origin of the turret and the feed origin of the motor can be made to coincide with each other, and the machining feed amount in the radial direction of the turret can be arbitrarily set by the NC control of the motor. Alternatively, the work surface can be dealt with, and the stopper adjustment, which has been a problem in the conventional example, can be eliminated and the workability of the adjustment work can be improved.

Further, when correcting the thermal deformation of the tool post feed shaft, the clamp portion is unclamped, and the tool post feed shaft is moved by the driving means to bring the tool post into contact with the stopper at the machining origin position, and the motor After setting the feed origin, set the clamp part in the clamped state so that the machining origin of the tool rest and the feed origin of the motor match. Since such thermal deformation correction of the tool post feed shaft can be performed for each machining, the influence of thermal deformation can be eliminated and the machining accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an NC control facing processing apparatus according to an embodiment.

FIG. 2 is a plan view showing a part of an NC control facing processing device in a cutaway manner.

FIG. 3 is a front view showing an NC control facing device.

FIG. 4 is a rear view showing an NC control facing processing device.

[Explanation of symbols]

 1 NC Control Facing Machine 2 Spindle 3 Turret 4 Turret 4 Feed Shaft 5 Base 6 Bearing 7 Housing 8 Bearing 9 Bearing 10 Gear 11 Gear 12 Gear 13 Motor 14 Housing 15 Motor 16 Head 17 T-Shaped Groove 18 Stopper 19 Stopper 20 Pinion 21 racks 22 racks 23 springs 24 clamps 25 guides 26 guides 27 rails 28 sliders 29 clamp cylinders 30 clamp sleeves 31 hydraulic chambers 32 supply ports 33 hydraulic paths 34 feed screw shafts 35 feed screw nuts 36 gears 37 gears 38 couplings 39 drive means Hydraulic cylinder 40 piston rod 41 lever 42 support bracket 43 pin 44 hook part 45 hooked part 46 gear case 47 tool 48 work

Claims (1)

[Scope of utility model registration request] 1. Rotation of the spindle (2) imparts cutting rotation to the tool rest (3) at the tip of the spindle (2), and movement of the tool rest feed shaft (4) in the spindle (2) in the axial direction. In the facing processing device (1) that gives the tool post (3) a machining feed in the diametrical direction of the spindle (2) from the machining origin position, at the rear end of the tool post feed shaft (4) it is freely movable in the axial direction and at any position. Clamping part (24) that can be fixed by a motor, and a motor (15) that gives a rotational movement of a rotation amount corresponding to the machining feed amount
A feed screw shaft (34) and a feed screw nut (35) for converting the rotational movement of the motor (15) into a linear movement in the machining feed direction and transmitting it to the clamp part (24);
Tool post (3) by forcibly moving the tool post feed shaft (4)
And a drive means (39) for bringing the tool into contact with the stopper (19) at the processing origin position, and when the thermal deformation of the tool post feed shaft (4) is corrected, the clamp part (2
4) is unclamped, the tool post feed shaft (4) is moved by the drive means (39) to bring the tool post (3) into contact with the stopper (18) at the machining origin position, and the motor (15). After setting the feed origin, set the clamp part (2
5) is clamped to the tool post feed shaft (4) so that the machining origin of the tool post (3) and the motor (15)
The NC control facing processing device (1), which is characterized by matching the feed origin of the.