JPH10315003A - Wheel lathe and cutting work method in this wheel lathe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working efficiency by performing cutting work on brake discs integrally formed in a wheel part in succession to cutting work of a tread or the like of the wheel part. SOLUTION: A necessary tool (for example, a tread cutting tool) is successively indexed to a work position by rotating both turret heads 15 and 15. A tread of a wheel part is worked in a desired shape by moving both saddles 6 and 6 in the Z axis direction by driving Z axis servomotors 5a and 5a, and by moving cross slides 7 and 7 in the X axis direction to the saddles 6 and 6 by driving X axis servomotors 11 and 11. Disc surface cutters 16 and 16 are indexed to a work position by rotating the turret heads 15 and 15. Both disc cutting tools Ta and Ta are moved by driving of the X axis servomotors 11 and 11 and the Z axis servomotors 5a and 5a, and cutting work is simultaneously performed on one side surfaces of both brake discs Wc and Wc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel lathe for cutting or shaping wheels which have been worn or deformed by running in vehicles such as electric trains, locomotives and passenger cars.
In particular, the present invention relates to a wheel lathe for cutting a wheel having a brake disc integrated with a wheel portion provided on both sides of a wheel set.

[0002]

2. Description of the Related Art In vehicles such as trains, locomotives, and passenger wagons, there is a wheel lathe for cutting a wheel worn by traveling or forming a new tire. In this type of wheel lathe, wheels are carried in from a transport rail laid on the front (or back) of the machine, and the wheels are centered on both sides by a center provided at a front end of a rotatable spindle of a headstock provided oppositely. While supporting it, transmitting the rotation of the main shaft to the wheel by engaging the rotational force transmitting means with the wheel, and performing machining with a tool having wheel portions provided at both ends of the wheel shaft mounted on a pair of tool rests. After processing, the support is released and the machine is carried out to the back (or front) of the machine. Wheel processing is
This is performed based on a preset NC program, copying model, or the like. Further, in addition to the above-described configuration, a lifter that lifts each wheel unit to a position higher than the transport rail by a predetermined amount when supporting the wheels is provided.

In some wheels, brake discs are integrally formed on both side surfaces of wheel portions provided on both sides of a wheel axle. However, conventionally, even if it is attempted to cut the brake disc of such a wheel with a single wheel lathe, there is a problem that the tool post and the tool interfere with the headstock and the rotational force transmitting means and the like, so that the machining cannot be performed. Was. Therefore, conventionally, in order to cut the brake disc of a wheel in which a brake disc is integrally formed with a wheel portion, after performing cutting of a tread surface or a flange surface with a wheel lathe, the wheel is removed from the wheel lathe. In a separate process, a machine tool such as an NC lathe was used. Therefore, attaching and detaching wheels to and from the machine tools such as wheel lathes and NC lathes and transporting the wheels require a great deal of time and labor, resulting in a problem of poor work efficiency.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to cut a tread surface or a flange surface of a wheel portion with a single wheel lathe. A wheel lathe capable of cutting a brake disc integrally formed on the side surface of a wheel portion without removing a wheel having finished cutting a tread or a flange surface from the wheel lathe as well as a wheel lathe and a wheel machining in the wheel lathe. It seeks to provide a way.

[0005]

In order to solve the above-mentioned problems, a wheel lathe of the present invention has the following arrangement. That is, the invention according to claim 1 is a pair of wheels provided on both sides of a wheel set for a railroad vehicle, and a wheel for cutting a brake disc integrally formed on at least one of the wheels. A lathe, arranged opposite to the bed, rotatably supporting spindles each having an axis on the same line, and two headstocks capable of moving forward and backward in the axial direction of the spindle, and each of the spindles. A wheel support member protruding from the main shaft and supporting the end of the wheel axle from both sides; a wheel support member driving means for moving the wheel support member forward and backward with respect to the main shaft; and the main shaft. And a rotational force transmitting means for engaging with the wheel supported by the wheel supporting member and transmitting rotation of the spindle to the wheel, and one for each of the two headstocks. Are provided, a tool rest movably mounted in the axial direction of the main shaft and in a direction orthogonal to the main shaft axial direction, and a tool rest on which a tool for cutting the wheel portion and the brake disk is mounted; and the two main shafts. The headstock is provided between at least one of the pedestals and the bed, and the headstock is provided at a first position at which the rotational force transmitting means and the wheel can be engaged with each other. When the brake disc is machined, the tool is moved forward and backward between the rotational force transmitting means and the brake disc between a second position where a tool for cutting the brake disc can enter. And a headstock driving means. According to a second aspect of the present invention, in the wheel lathe according to the first aspect, the wheel supporting member is provided between the headstock and the wheel supporting member, and the wheel supporting member is driven by the wheel supporting member driving unit to drive the wheel supporting member to the wheel. Side, and a first detection unit that outputs a first detection signal when the wheel support member comes into contact with an end of the wheel set. A detection signal is output from the first detection unit. When the first detection signal is output, the driving by the wheel support member driving unit on the side that outputs the first detection signal is stopped, and the first detection signal is output from both of the first detection units, and the wheel support member is output. Control means for performing control for simultaneously restarting the wheel support member driving means from a state in which the driving means is stopped. According to a third aspect of the present invention, in the wheel lathe according to the second aspect, the wheel support member is provided between the headstock and the wheel support member, and the wheel support member is driven by the wheel support member driving unit to drive the wheel support member into the wheel. And a second detection unit that outputs a second detection signal when the wheel support member is in a state in which the wheel support member can support and process the wheel, and the second detection signal is output. When the second detection signal is output from the second detection means, control is performed so as to stop driving by the wheel support member driving means on the side that has output the second detection signal. Wheel lathe. Further, the invention according to claim 4 is provided on a main shaft rotatable with respect to the headstock, wherein the ends of the wheel sets of the wheels of the railway vehicle are supported from both sides by wheel support members provided on the opposing headstock. The rotating force transmitting means is engaged with the wheel to transmit the rotation of the main shaft to the wheel, and a pair of wheel portions provided on the wheel and a brake disk integrally formed on at least one of the wheel portions A cutting method in a wheel lathe that performs cutting with a tool mounted on a tool rest movably provided in the axis direction of the spindle with respect to the spindle head and in a direction orthogonal to the spindle axis direction, Positioning one of the headstocks at a first position at which the rotational force transmitting means can engage with the wheel, and moving the other headstock away from the wheel more than the first position; When processing, the tool for cutting is moved to a second position where the tool for cutting can enter between the rotational force transmitting means and the brake disk, and the other wheel portion is moved by the tool provided on the tool post. And a cutting method for a wheel lathe characterized by cutting a brake disc. According to a fifth aspect of the present invention, there is provided the cutting method for a wheel lathe according to the fourth aspect, wherein
Move both the headstocks to the position, perform the cutting of the wheel portion, and move the headstock on the side of the headstock that performs the cutting of the brake disc to the second position, Cutting the brake disc of the wheel portion on the side where the headstock has moved to the second position, so that the wheel portion and each machining surface of the brake disc can be cut on the same machine. A cutting method in a wheel lathe characterized by the following.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the drawings. 1 is an overall configuration diagram of a wheel lathe of the present invention, FIGS. 2 and 3 are diagrams showing a configuration of a main shaft of a wheel lathe of the present invention, FIG. 2 shows a front end side of a main spindle, and FIG. FIG. 4 is an enlarged view of a main part of the present invention.

[Description of Overall Configuration of Wheel Lathe] First, FIG.
, The overall configuration of the wheel lathe of the present invention will be outlined. The wheel lathe in this embodiment has a gate-shaped structure, and a wheel W carried into a central processing area of the wheel lathe from a carry-in rail laid in front of or behind the wheel lathe is subjected to a predetermined processing in this processing area. And carried out via a carry-out rail laid behind or in front of the wheel lathe. The wheel W processed by this wheel lathe has two wheel portions Wb, Wb on both sides of a wheel axle Wa, and brake discs Wc, Wc are integrally formed on both side surfaces of each of the wheel portions Wb, Wb. Things. On the bed 19 of the wheel lathe, the portal column 12 is erected, and a pair of headstocks 1,
1 are provided to face each other. A machining area S in which the wheel W is machined is formed between the headstocks 1 and 1. Also,
The headstocks 1, 1 are movable back and forth along a guide (not shown) of the bed 19 in the axial direction of the spindles 3, 3, which will be described later, with respect to the machining area S, and serve as headstock drive means arranged on both sides of the wheel lathe. By the driving of the first headstock cylinders 13, 13, they move forward or backward in a direction in which they approach each other or in a direction in which they separate from each other. That is, a first position A at which the rotational force transmitting means described later can be engaged with the wheel, and a second position at which the rotational force transmitting means side end face of the wheel can be machined further from the wheel than the first position. B moves forward and backward. Further, the second headstock cylinders 13a, 13a advance and retreat to a carry-in / out position of a wheel and a working position located in a working area. The movement of the headstock 1 by the first headstock cylinder 13 and the second headstock cylinder 13a is confirmed by a limit switch (not shown), a proximity switch, a detected member (not shown), and the like.

The headstocks 1, 1 rotatably support the spindles 3, 3 on the same axis (on the Z-axis). Quills 21, 21 having centers 2, 2 mounted thereon are provided in the tapered holes or holes at the tips of the spindles 3, 3 so as to be able to move forward and backward with respect to the spindles 3, 3 on the spindle axis. The quill 21 and the center 2 constitute a wheel supporting member. Then, the wheel support means advances from the tip of the main shafts 3 and 3 toward the wheel W, and the center holes (not shown) formed at both ends of the wheel shaft Wa of the wheel W engage with the front end tapered portions of the centers 2 and 2. By centering the wheel axle Wa from both sides with a constant force, the wheel W is centered and supported in the processing area S. A disk-shaped face plate 3 is provided at the tip of each of the spindles 3.
a, 3a are attached. Wheels W are attached to the face plates 3a, 3a.
And a rotational force transmitting means 4 for rotating the wheels W together with the rotation of the main shafts 3 and 3 by engaging with the main shaft 3. The rotational force transmitting means 4 is provided by a plurality of (three in this embodiment) jaw bodies 4b provided at equal intervals on the same circumference and by supplying a pressure fluid (pressure in this embodiment) to the jaw bodies 4b. The jaw 4a is provided so as to be able to move forward and backward, and protrudes toward the wheel W by switching the supply direction of the pressure fluid by a switching valve (not shown) and engages with the wheel W.

The column 12 is provided with cross rails 5 in the horizontal direction.
Saddle 6, 6 movable in the axial direction (axial direction of main shaft 3)
Is provided. The saddles 6, 6 are provided with cross slides 7, 7 in the X-axis direction orthogonal to the Z-axis direction. A tool rest 8 on which a plurality of tools are mounted and which can determine a predetermined tool at a predetermined position by an indexing operation is provided on the cross slides 7 and 7. Symbols 5a, 5
Reference symbol 11 denotes a Z-axis servomotor which is a driving body for moving the right and left (left and right in the drawing) saddles 6 and 6 in the Z-axis direction, respectively.
Is an X-axis servo motor that is a driving body that moves the tool post 8, 8 in the X-axis direction along the cross slides 7, 7.
The saddles 6, 6 and the tool rests 8, 8 are moved via ball screws (not shown). The tool rests 8, 8 move to predetermined positions in the Z-axis direction and the X-axis direction.
A plurality of tools provided on opposite sides of the tool rest main bodies 14 and 14 for cutting the tread surface and the flange surface of the wheel W, a touch sensor described later, and the like are radially attached, and a predetermined tool is mounted. Turret heads 15, 15 that can be indexed to predetermined positions, and a disk surface cutting device 1 provided in the turret heads 15, 15
6, 16 are provided.

The disk surface cutting devices 16 and 16 each have a driving body such as a cylinder (not shown), and disk cutting tools Ta and T for cutting the brake disks Wc and Wc.
a is a cutting position protruding from the turret heads 15, 15 toward the wheel W in the radial direction of the turret heads 15, 15 and the turret heads 15, 15 stored in the turret heads 15, 15.
At the time of turning, a forward / backward movement is made between a retreat position which does not interfere with a splash cover (not shown), the cross rail 5 and the like. The disk surface cutting devices 16 and 16 are provided with disk surface measuring devices 17 and 17, respectively. The disk surface measuring devices 17, 17 are provided with brake disks Wc, Wc.
Measuring heads Tb and T for measuring the position (amount of wear)
b, and has a driving body such as a cylinder (not shown), and projects in the radial direction of the turret heads 15, 15 and in the direction opposite to the projecting direction of the disk cutting tools Ta, Ta. .

The measuring heads Tb, Tb protrude from the turret heads 15, 15 and can be brought into contact with the brake discs Wc, Wc of the wheels W, and when the turret head 15 is turned and stored in the turret heads 15, 15. The saddle 6 moves forward and backward between a retracted position that does not interfere with a splash cover (not shown) or the like. The measuring head T
b and Tb output signals when the contacts come into contact with the brake disks Wc and Wc. An NC device (not shown) that has received this signal, based on the movement data of the left and right tool rests 8, 8 at the time of outputting the signal, calculates a plurality of positions between the maximum diameter and the minimum diameter of the disk surfaces of the brake disks Wc, Wc. The end face positions (for example, at four locations) are read and used as wear amount data, and cut amount data is created from the wear amount data. Both of the disk surface cutting devices 16 and 16 perform the disk cutting tool T based on the cut amount (for example, the wear amount + α) created from the wear amount.
According to a and Ta, both brake disks Wc and Wc are cut at the same time or almost simultaneously. In addition,
In FIG. 1, reference numeral 9 is provided below the processing area S,
This is a lifter that raises the wheel W carried into the wheel lathe through the transfer rail 9a to a predetermined height position.

In this wheel lathe, the first and second rotational force transmitting means 4 of the headstock 1, 1 are engageable with the wheel portions Wb, Wb of the wheel W supported by the centers 2, 2 in the processing area S. Or the first position A is further away from the wheel W than the first position A, and when the brake disks Wc, Wc are machined, the tool rests 8, 8 and the disc cutting tools Ta, Ta are mounted on the headstock 1, 1,
And a positioning means for positioning the headstocks 1, 1 at a second position B which does not interfere with the rotational force transmitting means 4, 4. In this embodiment, the positioning means includes a positioning cylinder 5 provided near the processing area S of the bed 19.
5A, 55A and the positioning cylinders 55A, 55A.
Positioning cylinders 55B, 55B provided at a position farther from the processing area S and engagement members 56A, 56B formed on the headstocks 1, 1 and engaged with the engaging portions 56A, 56B protruding and retracting from the bed 19 by the positioning cylinders 55A, 55B. Holes 57, 5
7 is comprised.

The positioning cylinder 55A is driven to raise the piston rod provided with the engaging portion 56A, and
The headstock 1 is positioned at a position near the processing area S, that is, at the first position A, and the positioning cylinder 55B is driven to raise the piston rod provided with the engagement portion 56B, thereby engaging the headstock 1. When the headstock 1 is engaged with the hole 57, the headstock 1 is positioned at a position farther from the processing area S, that is, at the second position B. The positioned headstocks 1 and 1 are fixed to the bed 19 by fixing means (not shown). The movement of the engaging portions by the positioning cylinders 55A and 55B is confirmed by a limit switch, a proximity switch, and the like (not shown). If the headstocks 1 and 1 can be positioned at the first position A or the second position B,
It is not limited to the positioning cylinders 55A, 55B and the like, and other means may be used. Further, the positioning cylinder 55
A, 55B are provided on the headstock 1, 1 side, and engagement holes 57, 57 are provided.
May be formed on the bed 19 side. Furthermore, a cylinder that serves both positioning and fixing is provided on the headstock 1, 1
And the bed 19 may be provided.

[Explanation of the main shaft 3] Next, the configuration of the main shaft 3 of the wheel lathe will be described with reference to FIGS. In addition,
Since the main shafts 3 and 3 have the same symmetrical configuration, only one main shaft 3 (the main shaft 3 of the left headstock 1 in FIG. 1) is illustrated and described, and the other main shaft 3 is illustrated and described. Detailed description is omitted. In the following description, "front" means the right side of FIGS. 2 and 3, and "rear" means the left side. As shown in FIGS. 2 and 3, the spindle 3 is inserted from the rear end side of the headstock 1 to the front end side, and the front end side and the rear end side are bearings 1.
The headstock 1 is rotatably supported by the headstocks 8a and 18b. This spindle 3 is a spindle motor 10 which is a driving body.
(See FIG. 1). That is, FIG.
As shown in FIG. 3, the drive shaft of the spindle motor 10 and the spindle 3 are connected by a belt 10a.
, The main shaft gear 3a is rotated via a gear train (not shown), and the main shaft 3 is rotated.

[Explanation of Quill] The main shaft 3 has a through hole 3b formed along the main shaft axis. This through hole 3b is
And a front end of the large diameter portion 3b ₁ and the rear end side of the small diameter portion 3b ₂ Prefecture. The front end side of the large-diameter portion 3b _1, the large-diameter portion 3b
Predetermined amount diameter of quill slide hole portion 3b ₃ is formed from _1. Quill slide hole portion 3b ₃ of the through hole 3b is quill 21 is inserted from the front side. This quill 21
Outer peripheral surface in sliding contact with the quill slide hole portion 3b _3, the rotation is restricted by the rotation restricting member (not shown) to the main axis 3, and is forward and backward movably supported on the spindle axis direction. A center holding member 22 is fitted into the first tapered hole 21b at the front end of the quill 21.
The center 2 is mounted in the second second tapered hole 22a, and is held on the spindle axis. Also, at the rear end of the quill 21,
A nut member 23 having a screw hole 23a on the main shaft axis is attached by a bolt 23b.

[0016] the through hole 3b [Description of the screw shaft 24] is a screw shaft 24 which is inserted from the small-diameter portion 3b ₂ until the large-diameter portion 3b ₁ is disposed in the spindle axis. The screw shaft 24 has a front end side screw portion 24a, a rear end side shaft portion 24b, and a screw portion 24.
a and a flange portion 24c formed between the shaft portion 24b. The screw portion 24a is screwed into the screw hole 23a of the nut member 23 from the front end side. Shaft 2
4b is rotatably supported with respect to the main shaft 3 by a bearing 29a held by an engaging member 27 attached to a front end of a cylindrical portion 30b of a slide member 30 described later with a bolt. A thrust bearing 28 is interposed between the engaging member 27 and the flange portion 24c.
, The flange portion 24c can be relatively rotated. Reference numeral 50 denotes a nut screwed to the threaded portion of the shaft portion 24b, which regulates the bearing 29a so as not to come off, and fixes the bearing 29a, the engaging member 27, and the bearing 28 to the flange portion 24c. ing.

[0017] [shaft 25 and the description of the spring holding member 34] The small diameter portion 3b ₂ of the through hole 3b, the shaft from the rear side 2
5 has been inserted. The shaft body 25 has a large-diameter front end portion 25c having a fitting hole 25a into which the shaft portion 24b of the screw shaft 24 is fitted, and is provided rotatably on the main shaft axis. The screw shaft 24 is connected to a shaft portion 24b via a slide key 26.
Is fitted into the fitting hole 25a, so that it can rotate integrally with the shaft body 25 and move forward and backward with respect to the shaft body 25. Of course, instead of the sliding key 26, the shaft portion 24b of the screw shaft 24 may be formed as a spline shaft and the fitting hole 25a may be formed as a spline hole. The shaft 25 has a cylindrical spring holding member 3 having a flange portion 34a.
4 is externally fitted.

The shaft 25 is provided with the through hole 3 of the spring holding member 34.
It is rotatably supported by the spring holding member 34 by bearings 29b and 29c fitted in 4c. In FIG. 3, reference numeral 54 denotes a pressing member attached to the rear end of the spring holding member 34 and for restricting the bearing 29c from coming out of the through hole 34c. The movement of the shaft body 25 is performed at the front end 2
5c, bearing 29b, body portion 34b of spring holding member 34,
It is regulated by the bearing 29c and the holding member 54. A sprocket 38 is attached to the rear end of the shaft body 25 via a key 38a. The sprocket 38 is connected to a sprocket 60a fixed to a quill driving motor 60 as a wheel supporting member driving means by a chain 61 (see FIG. 1), and is rotated by the driving of the quill driving motor. The quill drive motor 60 is fixed to the headstock 1 via a mounting member. The rotation of the sprocket 38 is transmitted to the screw shaft 24 via the shaft body 25,
To rotate. The quill drive motor 60 is driven by the other headstock 1 in response to a command signal from an NC device (not shown).
Is a motor that can rotate simultaneously with the quill drive motor.

[Explanation of Slide Member] A slide member 30 is provided at the rear end of the main shaft 3 so as to be movable in the front-rear direction. The slide member 30 includes a cylindrical cylindrical portion 30b fitted into the through hole 3b of the main shaft 3, and a plurality of slide members 30 (2 in this embodiment) formed on the outer peripheral side of the rear end of the cylindrical portion 30b.
And the engaging projections 30a of the book. An engagement member 27 is attached to a front end of the cylindrical portion 30b of the slide member 30 by a bolt. As described above, the engaging member 27 is a bearing 29 that rotatably supports the screw shaft 24.
a and the thrust bearing 28, the slide member 30 moves forward and backward along the main shaft axis integrally with the screw shaft 24. The engagement projection 30a moves forward and backward within a recess 48a formed in the mounting member 48.

[Explanation of the spring receiving member] The spring holding member 34
A compression coil spring 37 (hereinafter, referred to as a spring 37) as a center urging means is fitted in the cylindrical portion 34b. The rear end of the spring 37 is received by the flange portion 34a,
The front end is received by a spring receiving member 35 fitted from the front end side of the spring holding member 34. Flange part 3
A portion facing the slide member 30 on the outer peripheral side of 5b is a convex portion 35d, and moves forward and backward in the concave portion 48a of the attachment member 48 like the engaging convex portion 30a. The spring receiving member 35 includes a cylindrical main body 35a inserted into a through hole of the cylindrical portion 30b of the slide member 30, and a flange portion 35b formed at a rear end of the main body 35a. It is formed as an inclined contact surface 35c. After the main body 35a is externally fitted to the main body 34b of the spring holding member 34, the spring receiving member 35
Nuts 36 and 3 screwed to the front end side of the main body 34b
6, the position is fixed so as not to get out of the spring holding member 34. That is, when the wheel W is not held between the centers 2 and 2, the spring receiving member 35
The urging force of the spring 37 constantly presses the nuts 36, 36. In the figure, reference numeral 33 denotes a body 35 a of the spring receiving member 35 and the cylindrical portion 3 of the slide member 30.
0b, a sliding key provided between the sliding member 30
In addition to restricting the relative rotation of the spring receiving member 35 with respect to the slide member 30, the relative movement of the spring receiving member 35 with respect to the slide member 30 along the main shaft axis direction is enabled. Of course, instead of the slide key 33, the spring receiving member 35 and the slide member 30 may be formed as a spline connection.

[Explanation of Stopper] A plurality of spring holding members 34 (in this embodiment, two
) Stoppers 47 are provided. This stopper 4
Numeral 7 moves from the radial direction of the main shaft 3 to the center of the main shaft 3, that is, the main shaft axis side, comes into contact with the contact surface 35 c of the spring receiving member 35, and regulates the spring receiving member 35 so as not to retract more than a predetermined amount. It is. The stopper 47 is connected to the spring holding member 34.
Are moved forward and backward by two cylinders 45 arranged at equal intervals on the outer periphery of the cylinder. That is, as shown in the figure, a cylindrical mounting member 48 is externally fitted to the spring holding member 34 outside the spring 37, and a cylinder body as a cylinder 45 and a cylinder cover protrude on the outer peripheral surface of the mounting member 48. It is fixed with bolts. A piston 46 is provided in the cylinder chamber 45a of the cylinder 45 so as to be able to advance and retreat in the radial direction of the main shaft 3, and a stopper 47 is attached to a tip of a piston rod 46a protruding from the piston 46. One surface of the stopper 47 facing the contact surface 35c of the spring receiving member 35 is formed as an inclined surface having the same inclination as the contact surface 35c. The piston 46 advances and retreats in the radial direction of the main shaft 3 by the pressure fluid supplied to one side 45b or the other side 45c of the cylinder chamber 45a via a rotary joint from a pressure fluid supply unit (not shown). Move forward and backward.

A gap L is provided between the spring receiving member 35 and the slide member 30. A plurality of disc springs 43 in the gap L are provided so as to overlap in a direction parallel to the axis of the main shaft. That is, a plurality of (eight in this embodiment) disc springs 43 are arranged in a row, supported by a guide pin 42 inserted through a central hole, and the guide pin 42 is attached to the slide member 30.
Spring receiving holes 41a and 41b are formed in the flange portion 30a of the slide member 30 and the flange portion 35a of the spring receiving member 35, respectively.
a, 41b. The spring receiving member 35
A hole 42a into which the guide pin 42 is inserted is formed at the bottom of the side hole 41a, and the slide member 30 is
The guide pin 42 does not interfere with the spring receiving member 35 when the guide pin 42 moves relative to the spring 5. The urging means including the plurality of disc springs 43 is used for the spring receiving member 3.
5 and the slide member 30 are provided at a plurality of places (for example, two places) at equal intervals along the circumferential direction, but the urging force by the urging means is such that the center 2 projects from the main shaft 3 and the wheel shaft Wa When it comes into contact with the end, it is applied to the wheel set Wa via the screw member 24 and the center 2.

In this embodiment, both headstocks 1 and 1 are positioned at two positions (first position A and second position B) at different distances from the end of the wheel shaft Wa of the wheel W. As a result, the center 2 of one headstock 1 positioned at the first position A reaches the end of the wheelset Wa earlier than the center 2 of the other headstock 1. For this reason, the urging force needs to be sufficiently small so that the wheel W is not pushed by the center 2 that has previously contacted the end of the wheel shaft Wa and the wheel W is moved from the lifter device 9. For example, when the weight of the wheel W is 1500 kgf and the friction coefficient μ between the wheel W and the lifter device 9 is 0.3, the wheel W is applied by applying a biasing force of 450 kg from the end of the wheel set Wa. Since we start moving,
There is no problem if the urging force is set to about 100 kgf in consideration of this value.

At the rear end of the headstock 1 as a fixed portion, a proximity switch 32a as a detecting means is provided via a bracket 32c.
Is attached. In addition, the slide member 30 includes
An annular detection member 31 is attached so as to protrude in the radial direction. The proximity switch 32a retracts a little from the position where the slide member 30 is pressed against the rear end of the main shaft 3 by the urging force of the disc spring 43 (the position shown in FIG. 3 or FIG. 4) against the urging force of the disc spring 43. Position, ie, the disc spring 4
When the center 2 moves to a position (shown by a two-dot chain line in FIG. 4) in which the center 2 presses the end of the wheel set Wa with an urging force of about 100 kgf with the urging force of 3, the detected member 31 is detected. In order to output a detection signal, the detection member 31 is provided so as to face a movement path of the detected member 31 accompanying the movement of the slide member 30 in the front-rear direction. In this embodiment, as shown in FIG. 3, the slide member 30 is
, And moved by a predetermined amount, that is, the spring 3
Proximity switch as detecting means for detecting the member to be detected 31 and outputting a detection signal when the center 2 is moved to a position where the center 2 is pressed by a pressing force capable of processing while supporting the wheel axle 7 by the urging force of 7 32b is provided at a position on the bracket 32c which does not interfere with the proximity switch 32a. The proximity switch 32b makes the biasing force of the spring 37 substantially constant, and an excessive biasing force exceeding the biasing force is applied to the center 2.
The NC device that has received the detection signal of the proximity switch 32b immediately stops driving the quill driving motor 60.

The flange portion 34a and the mounting member 48 of the spring holding member 34 have bolt holes 51 penetrating from the rear end to the front end at equal intervals in the circumferential direction. The spring holding member 34 and the attachment member 48 are attached to the rear end of the main shaft 3 by bolts 52 inserted through bolt holes 51 and screwed into screw holes 53 on the rear end surface of the main shaft 3. That is, the spring holding member 34 and the mounting member 48 rotate integrally with the main shaft 3.

Further, reference numeral 39 in FIG. 2, the detection bar spring holding member 34, the attachment member 48, by inserting the spring receiving member 35 and the main shaft 3 projects into the large-diameter portion 3b ₁ of the through hole 3b of the spindle 3 It is. A detection member 39a is attached to the rear end of the detection bar 39 protruding from the rear end of the spring holding member 34, and a proximity switch 39b serving as a detection unit is opposed to the movement path of the detection member 39a by a bracket 32c.
Attached to. This detection bar 39 is used for the quill 2
This confirms that No. 1 has moved backward to the origin position. The detection bar 39 is constantly urged forward by a spring 39c. That is, when the nut member 23 is retracted to the predetermined position, the detection bar 39 is pressed to move the detection bar 39 backward, the detected member 39a is retracted, and the movement to the predetermined position is detected by the proximity switch 39b. . The proximity switch 32a detects that the slide member 30 is retracted and the load applied to the center 2 by the disc spring 43 becomes a predetermined load (for example, 100 kgf) that does not move the axle. In the switch 32b, the slide member 30 is further retracted, the slide member 30 and the spring receiving member 35 come into contact with each other, and the urging force applied to the center 2 by the spring 37 is a predetermined urging force (for example, 2t) required to support the wheel W. Is detected. That is, when the center 2 sandwiches and supports the wheel axle Wa of the wheel W from both sides, the slide member 30 retreats together with the retraction of the center 2 and comes into contact with the spring receiving member 35, and the spring 37
The spring receiving member 35 is retracted by a predetermined amount against the urging force of the above. When retracted by a predetermined amount, the proximity switch 32b detects the detected member 31 and outputs a detection signal, and the control device that has received the detection signal stops driving the quill driving motor 60.

In the above description, the disc spring 43 has been described as an example of the urging means provided in the gap L. However, the slide member 30 can be urged forward with a constant urging force. Any other spring, rubber, or air cylinder may be used. Although the proximity switch has been described as an example of the detection means, a limit switch, a photoelectric switch, or the like may be used as long as it can detect that the slide member 30 has retracted to a predetermined position. Further, the detecting means is not limited to these switches. Further, the torque (current value) of the quill drive motor 60 may be detected and detected.
Further, in the above description, the disk surface cutting devices 16, 1
6 and disk surface measuring devices 17 and 17
It has been described that the turret heads 15 and 15 are provided on opposing surfaces.
The positions where the disk surface measuring devices 17 and 17 are provided are not limited to the turret heads 15 and 15 described above, and may be provided on a tool rest separate from the tool rests 8 and 8.

[Description of the Invention of the Function and Method of the Wheel Lathe] Next, the method of cutting a wheel in the wheel lathe of the present invention will be described together with the function of the wheel lathe. In addition,
5 and 6 are explanatory diagrams of a method of processing a wheel in a wheel lathe of the present invention. FIG. 5 (a) shows a case where a wheel is carried in between a headstock and is mounted on a lifter device to perform processing of a tread surface or the like. FIG. 5 (b) shows a state in which the lifter device is raised and both headstocks are moved to the first position and then both wheel support members are advanced, so that both centers contact the wheels. FIG. 5C is a diagram showing a state when the contact is made, and FIG. 5C is a diagram showing a state when the tread is processed. FIG. 6 (a) shows that after the lifter device is lifted and one headstock is positioned at the first position and the other headstock is positioned at the second position, both wheel support members are advanced and the first headstock is moved forward. FIG. 6B shows a state in which the center of the headstock side at the position is in contact with the wheel. FIG. 6B shows that the wheel is center-supported by the wheel supporting member, and the rotational force transmitting means of one of the headstocks is engaged with the wheel. FIG. 6 shows the combined state, FIG.
(c) is a figure which shows the state which cuts a brake disk by rotating a wheel.

The wheel W rolls on the transport rail 9a, is carried into the processing area S, and is mounted on the lifter device 9. At this time, the headstock 1,1 for the second headstock to wheel loading and unloading position center 2,2 and rotational force transmission means 4, 4 and the like do not interfere with the wheel W (at a distance L ₃ from the wheel portion Wb) Cylinder 1
It is retracted by 3a and stands by (state shown in FIG. 5 (a)). Further, the wheel support member is located at the origin position.
By driving a driving body (not shown) such as a servomotor of the lifter device 9, the wheel W is lifted to a height at which the axis of the wheel shaft Wa matches or substantially matches the axis of the main shaft. A not-shown touch sensor is mounted on the tool rest 8 (see FIG. 1) that descends in synchronization with the lifting operation of the lifter device 9, and a touch signal is output when the touch sensor contacts the wheel W. When this touch signal is output, the driving of the driver that raises the lifter device 9 is stopped.

When the axis of the wheel shaft Wa is lifted by the lifter device 9 to a height position that matches or substantially matches the main shaft axis, the wheel W is held at the height position. Further, the second headstock cylinders 13a, 13a (see FIG. 1) are driven to extend the piston rods 13b, 13b, and move the headstocks 1, 1 to the processing position on the wheel W side. The headstocks 1, 1 are located at the first position A near the wheel W by the second cylinders 13, 13, and the positioning cylinder 55A is driven to engage the engaging portion 56A with the engaging hole 57, thereby positioning the headstock 1,1. And fixed by fixing means. Next, the quill drive motor 60 is driven, and the screw shaft 24 rotates counterclockwise when viewed from the front (as viewed from the center 2 side).
Since the rotation of the quill 21 is restricted, the quills 21 and 21 advance forward from the origin position toward the wheels by the counterclockwise rotation of the screw shaft 24. Quill 2
The forward movements 1, 21 are performed almost simultaneously and at substantially the same speed. When the center 2 comes into contact with the center hole formed on the end face of the wheel set Wa, the advance of the center 2 and the quill 21 is restricted.

That is, when the center 2 abuts on the wheel axle Wa, the reaction force from the wheel axle Wa applied to the center 2 retreats the slide member 30 together with the screw shaft 24. At this time, the urging force of the disc spring 43 is applied to the wheel axle Wa. However, as described above, this urging force is sufficiently small with respect to the weight of the wheel W, so that the wheel W is moved. There is no. When the slide member 30 retreats by a predetermined distance that does not contact the spring receiving member 35, the proximity switch 32a detects the detected member 31 attached to the slide member 30, outputs a detection signal, and outputs the detection signal. To stop driving. At this time, a load (for example, 100
kgf) (see FIG. 5B).

When the proximity switches 32a of both headstocks 1 output a detection signal, from this state, both screw shaft rotating motors are started simultaneously to rotate the sprocket 38. The drive of the screw shaft rotating motor causes the two slide members 30 to abut on the spring receiving members 35 almost at the same time, and retreats the spring receiving members 35 at substantially the same timing. Therefore, the biasing forces applied to the centers 2 and 2 by the springs 37 and 37 are almost always the same. Spring 37,3
When the urging force applied to the centers 2 and 2 by the switch 7 becomes constant (for example, 2000 kgf), the proximity switch 32b detects the detected member 31 and outputs a detection signal to stop driving the quill driving motor.

At the same time, the cylinder 45 is driven to move the stopper 47 toward the main shaft axis, and presses the stopper 47 against the contact surface 35c of the spring receiving member 35 to restrict the spring receiving member 35 from retreating. Therefore, while the wheel W is supported by the centers 2 and 2 from both sides, the biasing force of the spring 37 biased by the centers 2 and 2 is maintained at a constant value (for example, 2000 kgf) and, for example, during the cutting process. Even if a cutting component or the like acts on the main shaft axis direction, the centers 2 and 2 do not move backward. Also, almost simultaneously with the driving of the cylinder 45, the jaw 4a of the torque transmitting means 4 projects from the jaw body 4b and engages with the wheel W. Thereby, the wheel W can rotate together with the main shaft 3. Centers 2 and 2 are wheels W
Is supported from both sides, the lifter device 9 descends.
Next, measurement of the tread surface, the flange surface, and the like of the wheel portion Wb of the wheel W is performed. For example, the diameter, flange thickness, runout, and the like of the tread surface are automatically measured by a touch sensor (not shown) or the like mounted below the tool rests 8, 8. The NC device creates a cut amount based on the data thus measured.

Next, the necessary tools (for example, tread cutting tools) are sequentially indexed to the machining positions by rotating both turret heads 15 and 15. Then, the main spindle motors 10, 10 (see FIG. 1) for driving the left and right main spindles are driven to rotate the main spindles 3, 3 synchronously, and the wheels W are rotated at a predetermined rotation speed. With the rotation of the main shaft 3 and the wheel W, the centers 2 and 2 and the quills 21 and 21, the screw shaft 24, the shaft body 25, the slide member 30, the spring holding member 34, and the spring receiving member 3
5, the sprocket 38, the cylinder 45, etc. rotate integrally. At this time, since the quill drive motor is in a state where the power supply is shut off, the quill drive motor is in a so-called idling free state and does not hinder the rotation of the sprocket 38 and the like. Further, Z-axis servo motors 5a, 5
a by driving both the saddles 6 and 6 in the Z-axis direction and the X-axis servo motors 11 and 11 to move the cross slides 7 and 7 in the X-axis direction with respect to the saddles 6 and 6. Is processed into a desired shape. Thus, the tool post 8, 8
By moving to the required position in the X-axis and Z-axis directions,
The wheel portion Wb of the wheel W is cut (see FIG. 5C).
When the cutting operation of the wheel portion Wb is completed, the spindle motor 1
0 and 10 are stopped to stop the rotation of the wheel W, and after the cutting of the tread of the wheel portion Wb or the like is measured by the touch sensor, it is confirmed that high-precision cutting has been performed.

Next, the lifter device 9 is raised. The jaw 4a is retracted toward the jaw body 4b, and the piston 46 of the cylinder 45 is retracted. The wheel support members are retracted to the origin positions by the quill drive motors 60, 60, and the centers 2, 2 are separated from the center holes of the wheels.
When the home position is reached, a detection signal is output from the proximity switch 39b, and the quill drive motors 60, 60 are stopped. The wheels are delivered and placed on the lifter device.

The headstock 1 on one side (for example, the left side in FIG. 1) is moved to the second position by the first headstock cylinder 13. That is, the fixing of the headstock 1 on one side is released, the positioning cylinder 55A is retracted so as to be detached from the engagement hole 57, and the first spindle is disengaged from the engagement hole 56A. The table cylinder 13 is moved from the first position to the second position. Positioning cylinder 55B
Is moved forward to engage the engaging portion 56 </ b> B with the engaging hole 57 for positioning, and the headstock 1 is fixed by fixing means. Both wheel support members are moved forward by the quill drive motors 60, 60 from the origin position toward the wheels at substantially the same speed.

One headstock 1 is moved from the wheel portion Wb of the wheel to L _1.
Since the other headstock 1 is located at the second position L ₂ away from the wheel portion Wb of the wheel,
The center 2 of the other headstock 1 contacts the center hole of the wheel axle Wa first. Then, since the proximity switch 32a detects the movement of the detected member 31 to the predetermined position and outputs a detection signal to the control device, the control device stops driving the other quill driving motor 60 (FIG. 6 (a)). )).
Later, the center 2 of one headstock 1 comes into contact with the center hole of the wheel axle Wa of the wheel. Then, since the proximity switch 32a detects the movement of the detected member 31 and outputs a detection signal, the control device stops driving the one quill driving motor 60.

Next, from this state, the control device simultaneously starts both quill drive motors simultaneously. Further, the wheel supporting member is moved forward at substantially the same moving speed. Both slide members 30, 30 are disc springs 43, 43
The slide members 30, 30 are retracted toward the spring receiving members 35, 35 to abut against the spring receiving members 35, 35 against the urging force of. The spring receiving members 35 and 35 and the slide members 30 and 30 move backward integrally with each other against the urging force of the springs 37 and 37. When the proximity switch 32b is the detected member 31
Is detected to have moved to a predetermined position, and the drive of the quill drive motors 60, 60 is stopped. That is, the wheels are supported from both sides by the force of the springs 37, 37 (approximately 2000 kgf). The piston 46 of the cylinder 45 is advanced to bring the stopper 47 into contact with the spring receiving member 35. The lifter device 9 is lowered to transfer the wheels to the wheel support members. The jaw 4a projects from the jaw body 4b, and the jaw 4a on the other side engages with the wheel (see FIG. 6 (b)).

Next, the turret heads 15 and 15 are rotated to index the disk surface measuring device 17 to the processing position, that is, the wheels W and W. Then, a cylinder (not shown) is driven to move the measuring heads Tb, Tb to the turret head 1.
5, 15 in the radial direction, and the X-axis servo motor 11,
11 and the Z-axis servo motors 5a, 5a to drive the two measuring heads Tb, Tb to the two brake disks Wc, Wc.
At the same time by making contact with one side surface. For example, the position data (Z) at which the contacts of the measuring heads Tb, Tb at the tips are brought into contact with a plurality of positions (for example, four positions) on the surface of one side (the right side in the drawing) of the brake disks Wc, Wc, and a contact signal is output Axis data)
The wear amount of the brake disks Wc, Wc is measured. At this time, since a sufficient clearance is formed between the other headstock 1 and the rotational force transmitting means 4 positioned at the second position B and the wheel portion Wb as shown in the drawing,
The measuring head Tb of the disk surface measuring device 17 can enter between the brake disk Wc and the torque transmitting means 4. The NC device creates a cut amount from the wear amount of the brake disks Wc, Wc measured in this way.

Next, after retreating the measuring heads Tb, Tb to the retreat position, the turret heads 15, 15 are rotated to index the disc surface cutting devices 16, 16 to the machining position, ie, the wheels W, W side. Next, the spindle motors 10, 10 for the spindles 3, 3 are driven to rotate the wheels W together with the spindles 3, 3 at a constant rotation speed. And the disk cutting tool T
a, Ta are projected in the radial direction of the turret heads 15, 15, and both disc cutting tools Ta, T are driven by the X-axis servo motors 11, 11 and the Z-axis servo motors 5a, 5a.
a is moved to simultaneously cut one side surface of both brake disks Wc, Wc (see FIG. 6 (c)). At this time, too, since a sufficient clearance is formed between the rotational force transmitting means 4 of the other headstock 1 positioned at the second position B and the brake disc Wc as shown in the figure,
The disk cutting tool Ta can enter.

After the machining of one side of the brake disks Wc, Wc, the disk cutting tools Ta, Ta are retracted, the tool rests 8, 8 are retracted, and the lifter device 9 is raised. Then, while the wheels W are placed on the lifter device 9, the jaws 4a, 4a are retracted,
The quill driving motors 60, 60
To retract the centers 2 and 2 to the origin position. In this case, since both centers 2 and 2 retreat almost simultaneously, it is not necessary to make one center 2 wait at a predetermined position. When the centers 2 and 2 are retracted, the support of the wheels W is released, and the wheels W are transferred to the lifter device 9. Then, the piston 46 of the cylinder 45 is moved backward. Next, measurement and processing of the other side of the brake disks Wc, Wc are performed. In a state where the proximity switch 39b has returned to the origin position where the detected member 39a has receded to the predetermined position, one headstock 1 is positioned at the second position B, and the other headstock 1 is moved to the first position. Position at position A. Thereafter, the procedures shown in FIGS. 6A to 6C are repeated in the same manner as described above to measure and process the other side surfaces of the brake disks Wc, Wc. After finishing the cutting on both side surfaces of the brake disks Wc, Wc, the wheels W are delivered to the lifter device 9. The lifter device 9 descends and lowers the wheels W on the transport rail 9a. Then, the wheel W is carried out from the wheel lathe by rolling on the transport rail 9a.

[Other Embodiments of Wheel Lathe] Although the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments. For example, in the above embodiment, the drive of the screw shaft rotation motor is stopped when one center 2 abuts on the end of the wheel set Wa,
Although the description has been given assuming that the screw shaft rotation motors of the two centers 2 and 2 are simultaneously started and rotated when the other center 2 abuts on the end of the wheel set Wa, the present invention is not limited to the above embodiment. It is not something to be done. In short, when the centers 2 and 2 are respectively projected from the headstocks 1 and 1 positioned at two different positions (the first position A and the second position B) to support the wheels W, the wheels W are supported from both sides. It suffices if the urging force for supporting can be applied synchronously.
For this purpose, for example, the headstocks 1 and 1 are first positioned and stopped at the same position (for example, the first position A), and the centers 2 and 2 are synchronously projected so that the wheels W are uniformly attached from both sides. When the urging force reaches a predetermined urging force (for example, 2t described above), the driving unit that moves the headstock 1 forward and backward while the urging force of one center 2 is maintained is driven to move to the second position B. It is good also as what makes it. In this case, it is necessary to synchronize the driving of the screw shaft rotating motor with the driving of the driving body for moving the headstock 1 forward and backward.

[0043]

According to the present invention, a wheel lathe can be used to cut a tread of a wheel portion, etc., and then to cut a brake disk formed integrally with the wheel portion. It is no longer necessary to remove the wheels from the wheel and cut the brake disc in a separate process. Therefore, the wheel cutting process can be centralized, and the operation of transporting the wheel between the processes and attaching / detaching the wheel to / from another machine tool is not required, and the working efficiency can be improved. In addition, since a series of cutting processes from the tread surface to the brake disk can be automatically performed, long-time continuous unmanned operation can be performed.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a wheel lathe of the present invention.

FIG. 2 is a sectional view of a configuration of a main shaft of the wheel lathe according to the present invention, in which a part of a main shaft front end side is omitted.

FIG. 3 is a cross-sectional view showing the main shaft of the wheel lathe according to the present invention and showing a rear end side of the main shaft.

FIG. 4 is a partially enlarged sectional view of a main part of the present invention.

5A and 5B are explanatory diagrams of a method of cutting a wheel in a wheel lathe of the present invention, wherein FIG. 5A shows a state in which wheels are carried between headstocks and mounted on a lifter device, and FIG. FIG. 7C is a diagram showing a state in which the lifter device is moved up and both headstocks are positioned at the first position, then both wheel supporting members are advanced, and both centers come into contact with the wheels; () Is a diagram showing a state when processing a tread or the like.

FIGS. 6A and 6B are explanatory diagrams of a method of cutting a wheel in a wheel lathe according to the present invention, wherein FIG. 6A shows a lifter device ascending, one headstock at a first position, and the other headstock at a second position; (B) shows a state in which both wheel support members are moved forward and the center on the headstock side at the first position is in contact with the wheels, and (b) shows a state where the wheels are center-supported by the wheel support members. FIG. 7 is a diagram showing a state in which the rotational force transmitting means of one headstock is engaged with a wheel, and FIG. 7C is a diagram showing a state in which the wheel is rotated to perform cutting of a brake disk.

[Explanation of symbols]

 W wheel Wa wheel set Wb wheel section Wc brake disc Ta disc cutting tool Tb measuring head S machining area A first position B second position 1 spindle head 2 center 3 spindle 4 rotational force transmitting means 4a jaw 4b jaw body 8 blade post 9 Lifter Device 13 First Headstock Cylinder 13a Second Headstock Cylinder 16 Disk Surface Cutting Device 17 Disk Surface Measurement Device 19 Bed 21 Quill 23 Nut Member 24 Screw Shaft 25 Shaft 27 Engaging Member 30 Slide Member 31 Detected member 32a Proximity switch (first detection means) 32b Proximity switch (second detection means) 35 Spring receiving member 37 Spring 38 Sprocket 43 Disc spring 55A, 55B Positioning cylinder 56A, 56B Engagement portion 57 Engagement hole 60 Quill drive motor

Claims (5)

[Claims] 1. A wheel lathe for cutting a brake disc integrally formed on at least one of the wheel portions provided on both sides of a wheel set of a wheel for a railway vehicle, and a bed. (19) Two spindle headstocks (1, 1) which are arranged opposite to each other and which rotatably support respective spindles (3, 3) having their axes aligned on the same line, and which are movable forward and backward in the axial direction of the spindles. ), A wheel support member (2, 2, 21, 21,...) Provided on each of the main shafts so as to be movable forward and backward, and protruding from the main shaft and supporting the end of the wheel axle from both sides. Wheel support member driving means (60, 60, 61, 61, 38,
38,...), And a rotational force transmitting means (4, 4) provided on each of the main shafts, for engaging with the wheels supported by the wheel support members and transmitting the rotation of the main shaft to the wheels. One or more are provided for each of the two headstocks, and are movable in the axis direction of the main shaft and in a direction orthogonal to the main shaft axis direction, and a tool for cutting the wheel portion and the brake disk is provided. A mounted tool rest (8, 8) is provided between at least one of the two head stocks and the bed, and the head stock can be engaged with the rotating force transmitting means and the wheels. A first position, and when the brake disk is processed further away from the wheel than the first position and the brake disk is processed, the brake disk is disposed between the rotational force transmitting means and the brake disk. Wheel lathe, characterized in that it comprises a headstock drive means tool for cutting machining is moved forward and backward in between the second possible position invasion (13), the. 2. The wheel lathe according to claim 1, wherein the wheel support member is provided between the headstock and the wheel support member, and the wheel support member is moved to the wheel side by driving of the wheel support member driving means. A first detection means (32a) for outputting a first detection signal when the wheel support member comes into contact with an end of the wheel set; and a detection signal output from the first detection means. Is stopped, the drive by the wheel support member driving means on the side that has output the first detection signal is stopped, and the first detection signal is output from both of the first detection means, and the wheel support member is driven. Control means for performing control for simultaneously restarting the wheel support member driving means from a state in which the means is stopped. 3. The wheel lathe according to claim 2, wherein the wheel supporting member is provided between the headstock and the wheel supporting member, and the wheel supporting member is driven by the wheel supporting member driving means to move the wheel supporting member toward the wheel axle side of the wheel. A second detection means (32b) for outputting a second detection signal when the wheel support member is moved to a state where it can be machined while supporting the wheel;
The control means, when the second detection signal is output from the second detection means, stops the driving by the wheel support member driving means on the side that has output the second detection signal. Wheel lathe characterized in that it is controlled in such a manner. 4. A rotary force transmitting means provided on a main shaft rotatable with respect to the headstock, wherein an end of a wheel set of a railroad vehicle is supported from both sides by wheel support members provided on opposed headstocks. By transmitting the rotation of the main shaft to the wheel by engaging with the wheel, a pair of wheel portions provided on the wheel and a brake disk integrally formed on at least one of the wheel portions,
A cutting method for a wheel lathe that performs cutting with a tool mounted on a tool rest movably provided in an axis direction of the spindle with respect to the spindle head and a direction orthogonal to the spindle axis direction, While positioning the headstock at a first position at which the rotational force transmitting means can engage with the wheel, separating the other headstock from the wheel more than the first position,
When processing the brake disc, the tool for cutting is moved to a second position where the tool for cutting can enter between the rotational force transmitting means and the brake disc, and the tool provided on the tool post is used to move the tool. A cutting method in a wheel lathe, wherein a cutting process is performed on a brake disk of the other wheel portion. 5. The cutting method for a wheel lathe according to claim 4, wherein both the headstocks are moved to the first position to perform a cutting process on the wheel portion. The headstock on the side on which the cutting of the brake disc is performed is moved to the second position, and the cutting of the brake disc on the wheel on the side on which the headstock is moved to the second position is performed. A cutting method for a wheel lathe, wherein the wheel portion and each processing surface of the brake disk can be cut on the same machine.