JPH08112703A - Headstock and metal working machine tool - Google Patents

Abstract

PURPOSE: To make the continuous running and dividing rotation of a main spindle possible by holding and pressing a disc fixed to the main spindle between shoes for controlling the rotary angle of the main spindle rotated through gear driving. CONSTITUTION: In the case where a turret head is attached to the spindle head 2b of a tool spindle 2, dividing rotation is carried out. When a servomotor 33 is energized, a driving shaft 17 is rotated through a shaft coupling by the rotation of its output shaft. A driving gear 21 united with the driving shaft 17 transmits rotation to a driven gear 14 for rotating a tool spindle 2. A signal issued from the encoder of a rotary angle detecting means which has detected the rotation of the tool spindle 2 is sent to a numerical control device, and when the rotary angle of the tool spindle 2 becomes a desired dividing angle, the numerical control device stops the servomotor 33, and the tool spindle 2 is thereby stopped and divided to a desired position. Continuously a brake shoe assembly is actuated to brake a brake disc 41 for fixing the tool spindle 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headstock which can be indexed and continuously operated, and a metal machine tool provided with such a headstock as a tool headstock or a workpiece headstock.

[0002]

2. Description of the Related Art As a turret head, a fixed tool or a rotationally driven tool is provided on the outer periphery of a polygon, and indexing is performed to sequentially act on a workpiece to perform machining. Various methods are used for indexing the tool spindle stock that enables indexing of the tool spindle of the turret head.

One method is to provide an indexing plate concentrically with the tool spindle, and to make indexing holes on the circumference of the indexing plate, and then to use indexing pins provided on the tool spindle stock main body side in order. Indexing is performed by fitting to. This method is, for example, 12 in the least common multiple when it is desired to index the circumferential direction into 2, 3 and 4.
The circumferential direction may be divided by and the indexing holes may be provided. That is, in terms of angles, the index holes may be equally divided into 360/12 = 30 °. When the circumferential direction is divided into 5 in addition to the 2, 3 and 4 indexing, the indexing hole row is divided into 12 parts in the circumferential direction and the indexing hole is divided into 5 parts in the circumferential direction on different radii of the indexing plate. Provide a row of exit holes. Or, since the number of indexes is relatively prime, as long as the indexing holes do not overlap, the indexing of 2, 3, 4, 5 on the same radius can be done with a small number of indexing holes even if the circumferential direction is not equally divided into 60. It is also possible to put out. For indexing rotation when performing such indexing, an intermittent motion mechanism using a ratchet, a one-way rotating clutch, a mechanism using a cam and a link, etc. are known.

Another method is to fix one indexing gear of a pair of indexing gears such as a curvic coupling or an immediate crown gear or the like to the tool headstock main body or axially to the workpiece headstock main body. It is mounted so that it can move freely and does not rotate, and the other indexing gear is fixed to the tool spindle, and the tool spindle is advanced or retracted, or the indexable gear that is axially movable with respect to the workpiece is advanced or retracted in the axial direction. The indexing gear pair is disengaged, the tool spindle is rotated for indexing, and the indexing gear pair is meshed after indexing.

In a compound machine tool capable of turning and milling, a work headstock that supports and rotates a work is immovable, and a milling unit and a turret head on the tool stand are separately arranged. Then, the milling unit is moved to draw a desired tool path on the milling cutter, and the carrier of the turret head is moved to draw a desired tool path on a cutting tool (bite) attached to the turret head.

[0006]

According to the method using the indexing plate and the indexing pin, indexing holes are provided on different radii of the indexing plate even if the numbers of indexing are relatively prime. Depending on the case, various index numbers can be obtained with a small number of index holes provided on the same radius of the index plate. However, there are limits to obtaining various index numbers. Moreover, since the positioning is performed in the circumferential direction by the indexing hole and the indexing plate, the tool is easily displaced by a large cutting force applied to the tool spindle. That is, it is known that the rigidity is low.

According to the indexing method using the indexing gear pair, although the indexing number is restricted, if the indexing gear is fixed to the tool spindle, the indexing gear pair can be pressed firmly in the axial direction, so that the rigidity is increased. Large, suitable for precision machining. Also, when one of the index gear pairs is provided on the tool headstock so as to be movable in the axial direction, it is relatively easy to obtain rigidity.

However, there is a limit to the number of indexes in any of the above cases. Moreover, although the indexable tool headstock is designed to be capable of repeating intermittent motions because the indexing plate or indexing gear is rotated during indexing, it cannot rotate continuously.

On the other hand, as a metal machine tool, there is a turning machine capable of continuously rotating a work held by a work headstock to obtain a shape of a circular cross section or a non-circular cross section, typically various lathes. Examples of the processing of a circular cross section or a non-circular cross section include a crankpin mirror and a cam mirror. These include one in which a tool carrier is provided on a tool spindle for continuously rotating the tool with respect to a workpiece, and a large number of tools, for example, cemented carbide chips are arranged on the circumference thereof. Such processing is, for example, turn broaching (machine technology
Volume 39, Issue 4 (April 1991)). Further, in machining the cam, a side cutter having a cutting edge on the outer circumference or an end mill is used.

In the above-mentioned lathe, the blade is fixed and the workpiece rotates, but in a metal machine tool for performing turn broaching or milling, the blade continuously rotates and the workpiece also rotates. Conventionally, in such a case, since the turning machine tool and the metal machine tool for performing the turn broaching or the milling are completely separate from each other, there is a drawback that the equipment cost becomes high.

As described above, in the compound machine tool, the milling unit and the turret head have to be moved so as to give desired tool trajectories to each other, so that the guide and drive device for these carriers (saddles, etc.) becomes complicated, Arrangement on the same machine stand becomes difficult. There is also a method of supporting the milling unit and the turret head on the same carrier, but it also occupies a large space and makes the mechanical configuration difficult.

An object of the present invention is to provide a headstock which can be continuously rotated and can be indexed and rotated, and further developed to provide a metal machine tool equipped with the headstock, whereby various tools can be used. An object is to provide a metal machine tool that can be used.

[0013]

A first aspect of the present invention is a spindle that is rotatably supported by a headstock body, a drive shaft that is rotatably driven orthogonally to the spindle, and a drive shaft. A drive gear, a driven gear that is meshed with the drive gear and is fixed to a main shaft, a disc that is fixed to the main shaft, a shoe that can sandwich the plate surface of the disc, a shoe pressing means, and a main shaft. And a rotation angle control means for the headstock.

A second invention of the present invention is provided with a work headstock for gripping a work and continuously rotating the work, and a tool base for effecting machining by applying a tool cutting edge to the work held by the work headstock. In the metal machine tool, the tool base is arranged on the circumference of a tool carrier in which a tool rotates around a tool spindle, and the tool spindle is a tool spindle stock that can be indexed and continuously rotated. It is a metal machine tool that does.

According to a third aspect of the present invention, a tool headstock has a tool spindle rotatably supported by a tool headstock body, and a drive shaft rotatably driven orthogonally to the tool spindle.
A drive gear provided on a drive shaft, a driven gear that meshes with the drive gear and is fixed to a tool spindle, a disc fixed to the tool spindle, a shoe that can sandwich the plate surface of the disc, and a pressurizing means for the shoe. And a tool spindle rotation angle control means. A metal machine tool according to a second aspect of the invention is provided.

A fourth aspect of the present invention is provided with a work headstock for gripping a work and continuously rotating the work, and a tool base for effecting machining by operating a tool cutting edge on the work held by the work headstock. In a metal machine tool, the workpiece headstock includes a workpiece spindle that supports and rotates the workpiece, and the workpiece headstock has a workpiece spindle that can be indexed and continuously rotated. A metal machine tool characterized by being a headstock.

According to a fifth aspect of the present invention, the work headstock has a work head spindle rotatably supported by the work head stock body, and a drive supported so as to be rotationally driven orthogonally to the work head spindle. A shaft, a drive gear provided on the drive shaft, a driven gear that is meshed with the drive gear and is fixed to the workpiece spindle, a disc fixed to the workpiece spindle, and a shoe that can sandwich the plate surface of the disc. A metal machine tool according to a fourth aspect of the present invention, comprising a pressurizing means for the shoe and a rotation angle control means for the work spindle.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a vertical sectional view of a tool headstock, and FIG. 2 is a sectional view taken along line AA of FIG. The tool headstock main body 1 is adapted to be attached to a stationary or movable member for supporting the main body 1 of a metal machine tool, for example, a fixed member such as a machine base, or a movable member such as a saddle or a slide. When fixed to the fixed member of the
The work piece is supported on a Y slide to perform a predetermined motion.
In addition, the tool headstock body 1 can be attached to movable members such as saddles and slides.
When the work piece is mounted and fixed, the tool headstock body 1 is fixed to, for example, an XY slide in order to cause the tool headstock body 1 to perform a motion to draw a required tool path. Furthermore, when the tool headstock body 1 and the work piece are attached to different movable members, respectively, the tool headstock body 1 and the work piece perform different movements at least in the crossing direction to obtain a desired work piece. To

The tool spindle 2 includes a tool headstock body 1 and bearings 3
It is rotatably supported by 4. The bearing 3 has an outer race 5 fitted in the front bearing mounting hole 1a of the tool headstock body 1 attached to the toolheadstock body 1 with bolts 6,
A radial load roller 7 and a thrust load roller 8 are in contact with the inner circumference and both sides of the outer race 5, and inner races 9a and 9b are in contact with these rollers 7 and 8, respectively. A bolt 11 penetrates the inner races 9a and 9b fitted to the tool spindle 2 in the axial direction of the tool spindle 2, and the bolt 11 is screwed into the tool spindle 2. The rear bearing 4 is a roller bearing and has an outer ring 4 in the rear shaft mounting hole 1b of the tool headstock body 1.
a is fitted, and the collar 12 and the rear bearing 4 are fitted in this order to the portion of the tool spindle 2 that has been reduced in diameter by the stepped portion 2a.
It is fixed by a lock nut (lock member not shown) 13 screwed in.

Hindle worms, hypoid gears, spiral bales, which are used between two axes intersecting with the tool spindle 2.
A driven gear 14 such as a Zellore gear is provided with a spacer 15 in the axial direction.
The driven gear 14 is fitted with the positioning pin 16 which penetrates the driven gear 14 and the spacer 15 and is driven into the tool spindle 2 to determine the movement in the circumferential direction.
It is fixed at 0.

As shown in FIG. 2, the drive shaft 17 crosses the tool spindle 2 at a right angle. The drive shaft 17 is rotatably supported on the tool headstock body 1 by bearings 18 and 19. A drive gear 21 is integrally provided on the drive shaft 17, and the drive gear 21 meshes with the driven gear 14.

It is preferable that the gear pair of the driving gear 21 and the driven gear 14 has a large number of simultaneous meshes and a large transmission force.
Further, if it is irreversible, it is preferable, but for example, the reduction ratio is 1:58.
You may be irreversibly close to each other.

The bearing 18 for supporting the drive shaft 17 is a roller bearing, and the outer race 18a is fitted in the bearing house hole of the tool headstock body 1, and the lid 22 fitted in the hole is fixed by the bolt 23. The inner race 18b fixed by means of a roller is fitted to the drive shaft 17 and is stopped by a shaft retaining ring 24 fitted to the drive shaft 17.
The pair of bearings 19 are positioned by the step portion 17a of the drive shaft 17, and the step portion is provided by the lock nut 25 which is fitted back to back (back to back) through the spacer 20 between the outer rings 19a and screwed into the drive shaft 17. The inner ring 19b of the bearing 19 is tightened toward 17a so as to be preloaded and fixed, and the spacer 26 is fitted in the tool headstock main body 1 through the axial direction, and the main body is fixed with the bolt 27. It is fitted to a bearing house 28 fixed to No. 1 and is fixed to the tool headstock main body 1 by a bearing retainer 31 fitted to the bearing house 28 and fixed by bolts 29.

The drive shaft 17 is fixed to the output shaft 33a of the servo motor 33 via the shaft joint 32, and the servo motor 33
Is fixed to the tool headstock main body 1 via a shaft coupling case 34.

As shown in FIG. 1, the spindle head 2b of the tool spindle 2 is shown.
Has a flange shape, and the outer periphery of the spindle head 2b is inserted into a shaft-sealing case 35 to be shaft-sealed. The shaft-sealing case 35 is fitted to the front portion of the tool headstock main body 1 and is fixed to the main body 1 with bolts 36. A drive key 38 for mounting a turret head, a milling cutter, a turn broach, etc. is fixed to the tool spindle head 2b with bolts 39, and a female screw is provided on the end face (not shown).

The tool spindle 2 is fitted in the rear bearing mounting hole 1b, and a shaft sealing member 43 such as an oil seal, which is attached to a shaft sealing house 42 fixed to the tool spindle stock main body 1 with a bolt 41, is inserted therethrough. And then project backwards. A brake disc 44 is fitted to the rear portion of the tool spindle 2 and is fixed to the tool spindle 2 with a fixture 42.

The brake shoe assembly 4 is attached to the bracket 46 fixed to the tool headstock main body 1 with bolts 47.
8 is fixed. This brake shoe assembly 4
Reference numeral 8 is a well-known device that brings the shoe closer by hydraulic operation to clamp the brake disc 44 for braking.

As shown in FIG. 3, the servomotor 33 is controlled by a numerical controller 49, and a rotation angle detecting means such as an encoder 51 connected to the rear end of the tool spindle 2 detects the rotation angle of the tool spindle 2. It is sent to the numerical controller 49.

The operation of the above configuration will be described. When a turret head (not shown) is attached to the spindle head 2b of the tool spindle 2, indexing rotation is performed. When the servomotor 33 is energized, the rotation of the output shaft 33a rotates the drive shaft 17 via the shaft coupling 32. Drive shaft 1
The drive gear 21 integrated with 7 transmits the rotation to the driven gear 14,
The tool spindle 2 rotates. The signal from the encoder 51 of the rotation angle detecting means that detects the rotation of the tool spindle 2 is sent to the numerical controller 4
When the rotation angle of the tool spindle 2 reaches a desired indexing angle, the numerical controller 49 stops the servo motor 33 to stop the tool spindle 2 and index it to a predetermined position. Subsequently, the valve of the hydraulic source 48 is controlled by its auxiliary function to operate the brake shoe assembly 45 to operate the brake disc 41.
Brake and fix the tool spindle 2. The brake shoe assembly 45 is released before the start of the indexing rotation.

When a rotary tool such as a turn broach, a milling cutter or a drill is attached to the spindle head 2b of the tool spindle 2, the tool spindle 2 rotates continuously. In this case, the servomotor 33 is controlled by the numerical controller 49 so that the tool spindle 2 rotates at a desired rotation speed. When it is necessary to stop the rotary tool at a fixed position, the encoder 51 of the rotation angle detecting means detects the rotation angle of the tool spindle 2,
Stops the tool in position for rotation.

[Embodiment 2] An embodiment in which the headstock of the first embodiment is applied to a metal machine tool as a tool headstock (denoted by reference numeral 60) will be described.

FIG. 4 shows a second embodiment shown in a plan view. A workpiece headstock 62 is fixed on the machine base 61, and a tailstock 64 which is moved back and forth toward the workpiece headstock 62 and whose position is adjusted is parallel to the line connecting the workpiece spindle 81 and the tailstock center 84. Na machine stand 6
1 is engaged with the upper guide 63. A guide 6 on the machine base 61 parallel to the line connecting the work spindle 81 and the tailstock center 84.
A saddle 66 is engaged with 5. A guide 67 orthogonal to the guide 65 is provided on the saddle 66.
The tool headstock 60 is engaged with 7.

The saddle 66 is driven by a servo motor 68 fixed to the machine base 61 and a screw feeding device 69 connected to the servo motor 68. The screw feeding device 69 is a device in which a ball screw connected to the servo motor 68 is screwed into a ball nut (not shown) fixed to the saddle 66. The tool headstock 60 includes a servomotor 71 fixed to a saddle 66 and a screw feed device 7 connected to the servomotor 71.
2 driven. In the screw feed device 72, a ball screw connected to the servomotor 71 is a tool headstock 60.
It is screwed into a ball nut (not shown) fixed to.

A tool unit storage table 73 is provided at the position behind the work headstock 62. The storage table 73 is provided with a swivel head 75 that performs indexing rotation around a pivot 74 that is erected on the machine table 61. In this example, the swivel head 75 is indexed at 180 degrees, and a turn broach 77 and a turret head 78 are fixed as tool heads to the parallel tool holding surfaces 75a and 75b of the swivel head 75, and these tool heads are selected. In general, it faces the tool headstock 60.

As shown in FIG. 5, the tool unit storage table 73
On the tool holding surfaces 75a and 75b of the swiveling head 75, a plurality of tool holding pins 79 which are movable in the radial direction at equal radius positions around the center C of the center of the tool spindle 60 on the machine base 61 are provided. The directions are evenly arranged. The tool holding pin 79 is driven by a driving device having a scroll groove inside the orbiting head 75, so that the plurality of holding pins 79 are always on the circumference of concentric circles having the same radius. And
Each of the turn broach 77 and the turret head 78 has a hole into which a holding pin 79 is fitted.

An encoder 51 is fixed to the rear end of the tool spindle 2, and the signal from the encoder 51 is sent to the numerical controller 49. The signal of the encoder 51 is used for rotation indexing of the tool spindle 2 and for stopping at a fixed position. Further, the encoder 8 is provided at the rear end of the workpiece spindle 81 of the workpiece spindle stock 62.
2 is provided, and the signal of this encoder 82 is sent to the numerical control device 49, and the numerical control device 49 makes the encoder 8
According to the angle detected by 2, the servomotor 71 is driven to move the tool headstock 60 back and forth with respect to the workpiece W via the screw feed device 72, so that the workpiece W moves to a non-circular cam or a crankpin. The eccentric circular work piece is processed.

The numerical controller 49 drives the servomotor 68, and moves the saddle 66 through the screw feed device 69 to the workpiece W.
Send parallel to the axial direction of. By sending this saddle 66,
A tool head fixed to the tool spindle 2, for example, a turn broach 77, performs indexing for changing the position of the workpiece W opposed to the axial machining site, and when the tool spindle 2 is equipped with the turret head 78, the turret head 78. The turning tool of (1) gives a cutting feed in the axial direction of the workpiece W.

Turn broach 77, turret head 78
Are attached to the tool spindle 2 via adapters 86 and 87, respectively.
7 and the turret head 78, respectively. As shown in FIG. 6, the back part of the adapter 86.87 is provided with a centering cylinder 89 that fits in the center hole 2c of the end face of the spindle head of the tool spindle 2, and the radial key that fits the drive key 38 on the end face. A groove 91 is provided. Bolts 92 are inserted into a plurality of axial holes that are evenly arranged in the circumferential direction on the radii of the adapters 86 and 87, and are screwed into the female threads 2d on the end face of the spindle head of the tool spindle 2.

Although not shown, the swivel head 75 has a built-in nut runner for driving a bolt 92 for attaching the adapters 86, 87 to the tool spindle 2 while holding the adapters 86, 87 by the pins 79. ing.

The operation of the above configuration will be described.
The workpiece W is, for example, the illustrated crankshaft for a four-cylinder internal combustion engine. One end of the workpiece W is gripped by a chuck 83 attached to the workpiece spindle 81, and the other end is supported by a tailstock center 84 where a tailstock 64 advances and retreats. The center of rotation of the workpiece W is the respective journals 1J, 2J, 3J of the workpiece W,
It is on the line passing through the center of 4J.

The workpiece W is attached in the state of FIG. 4, and in the standby state, the tool unit storage base 73 accommodates the turn broach 77 and the turret head 78. The center of the tool spindle 2 of the tool spindle stock 60 coincides with the centers of the turn broach 77 and the turret head 78 housed in the turning head 75.

When the machine is started at this point, the swivel head 75
Is rotationally indexed by 180 degrees about the pivot 74 so that the turret head 78 faces the head of the tool headstock 60.

Here, the servo motor 68 is driven, the screw feed device 69 is rotated by the screw feed device 69, the saddle 66 is moved forward, and the tool headstock 60 carried by the saddle 66 is carried out.
Moves rapidly, and the spindle head of the tool spindle 2 is the turret head 7.
When moving closer to the adapter 87, the centering cylinder 89 of the adapter 87 fits in the centering hole 2c of the tool spindle 2, and the key groove 91 of the adapter 87 is fixed to the tool spindle 2. The drive key 38 fixed to the drive key 38 is fitted. For this reason, the tool spindle 2 is stopped at a fixed position when the tool head is replaced. Subsequently, a nut runner (not shown) provided on the swivel head 75 causes the bolt 9
2 is driven and screwed into the female screw 2d on the end face of the spindle head of the tool spindle 2, and the turret head 78 is fixed to the tool spindle 2.

Subsequently, the servo motor 68 causes the screw feeding device 6 to
The saddle 66 is moved in the backward direction via 9. Then, the workpiece spindle 81 and the chuck 83 are rotated by a drive device (not shown) on the workpiece spindle head 62 side to rotate the workpiece W and the workpiece with various not shown cutting tools on the circumference of the turret head 78. End E including one end journal EJ of W
Turn W. The shape of the end portion EW of the workpiece W is formed by the numerical control device 49 using the servo motor 68 (Z axis) and the servo motor 71 (X axis) to cause the tool headstock 60 to perform a required motion. The processing of this portion is a normal turning processing, and a detailed description of the tool layout is omitted.

When the turning of the end portion EW is completed, the servo motor 71 is driven to retract the tool headstock 60 via the screw feed device 72, and the tool spindle 2 is moved to the center of the turning head 75.
Of the turret head 78 and the swivel head 75 by driving the servo motor 68 to move the saddle 66 forward.
Face each other. After the end of the workpiece EW has been machined, the tool spindle 2 is rotated by driving the servomotor 33 until the turret head 78 and the turning head 75 face each other. The pin provided on the turning head 75 is detected by the encoder 51. 79
Has rotated to a position where the holes of the turret head 78 that fit with the pins 79 are aligned and stopped. When the turret head 78 and the turning head 75 come close to each other and come closer to each other, the pin 7
9 enters the hole of the turret head 78 and changes the radial position so that the turret head 78 can be supported. The nut runner (not shown) of the swivel head 75 is a bolt 92.
To loosen the bolt 92 to engage the female screw 2d of the tool spindle 2.
Remove from Subsequently, the servo motor 68 is energized, and the saddle 66 is retracted to a position where it does not prevent the turning head 75 from turning while holding the tool unit, whereupon the turning head 75 rotates 180 degrees and the turn broach 77 and the tool spindle. It faces the spindle head of No.2.

The servo motor 68 is driven again, the saddle 66 moves forward, and the center hole 2c of the spindle head of the tool spindle 2 is fitted into the centering cylinder 89 of the adapter 86 of the turn broach 77. The drive key 38 fixed to is fitted into the key groove 91 of the adapter 86. Subsequently, a nut runner (not shown) of the turning head 75 is driven to screw the bolt 92 into the female screw 2d of the tool spindle 2. Until then, the adapter 86 was urged to expand the position in the radial direction.
The pin 79 of the swivel head 75 which has held the position is reduced in radial position by a scroll (not shown), and the turn broach 77 is carried only on the tool spindle 2 via the adapter 86.

Subsequently, the servo motor 68 is energized and the saddle 66 moves backward. And the turn broach 77 is the workpiece W
Stop at a position that coincides with the journal 1J. Here, the steady rest 99 provided on the machine base 61 moves forward to contact the end journal EJ, the servo motor 71 is then energized, the tool headstock 60 moves forward to perform turn broaching, and the journal of the workpiece W is performed. 1J is formed. Here, when the turn broach 77 is a spiral tool, the blade edge comes close to the journal 1J and then the servo motor 71 is stopped to rotate the turn broach 77 at a fixed position and rotate the workpiece W. When the turn broach 77 is a circular tool, the workpiece W is rotated while the servo motor 71 is rotated to feed the turn broach 77 by cutting. Here, the steady rest 99 supports the workpiece W against the cutting force of the turn broach 77 and reduces the deformation of the workpiece W due to the cutting force.

When the processing of the journal 1J is completed, the servo motor 71 retracts the tool headstock 60, and the servo motor 68
Indexed the turn broach 77 to the position of the journal 2J, the servo motor 71 was energized, and the turn broach 77 was turned on.
To perform the same processing as the journal 1J. Then, the journals 3J and 4J are processed in the same manner, and when the processing of the journals 1J, 2J, 3J and 4J is completed, the crank pin 1
Processing of P, 2P, 3P and 4P is performed. In the case of machining the crank pin, the numerical controller 49 detects the rotation angle of the workpiece W with the encoder 82 and controls the servo motor 71 to perform the machining to form the crank pin into a cylindrical shape. At this time, the already finished journals 1J, 2J, 3J, 4J are properly supported by steady rests.

After processing, the servo motor 71 is driven to retract the turn broach 77 from the workpiece W, the servo motor 68 is urged to move the saddle 66 forward, and the turn broach 77 is transferred to the tool unit storage table 73. .

"Embodiment 3" Embodiments 1 and 2 are described as tool headstocks, respectively. On the other hand, in the present embodiment, the tool headstock 60 is used as the workpiece headstock (hereinafter reference numeral 162 is used).
When using as. In FIG. 7, the work headstock 162 is fixed on the machine base 101, and the tailstock 102 can be fixed by adjusting the position by advancing and retreating in opposition to the work headstock 162.
The workpiece W is held by the chuck 103 and the tailstock center 104 attached to the workpiece spindle. The tool rest 105 is a saddle 106 that is driven and driven in the Z direction parallel to the workpiece W.
It is fixed on a cross slide 107 that moves forward and backward in the X direction orthogonal to the plane of the drawing. Z for the column 108 fixed to the workpiece headstock 162 or the machine base 101
A drill head 111 is vertically adjustable at the tip of a column 109 whose position is adjustable in the direction.
The sleeve 112 of the drill head 111 is adapted to be fed in the vertical direction (Y direction).

In the above, the workpiece W is turned by a cutting tool (not shown) fixed to the tool rest 105. At this time, the workpiece spindle (same as the tool spindle 2 in FIG. 1) 2 is continuously rotated. And after turning, drill head 11
1 is moved back and forth to drill the workpiece W in the radial direction, then the workpiece spindle 2 is rotationally indexed, and the drill head 111 repeats the drilling to form a radial hole around the workpiece W.

[0053]

According to the first aspect of the present invention, since the main shaft can be driven by a gear and the main shaft can be braked by a disc brake, the main shaft can be continuously rotated by continuously rotating the drive gear, and the drive gear can be rotated by a predetermined angle. The main shaft can be indexed and fixed at the indexing position by performing. Since rotation indexing is performed by gear drive, no indexing plate is required and the structure is simple.

A second aspect of the present invention is a metal machine tool, which is provided with a tool headstock capable of continuously rotating and indexing a tool spindle, so that the tool headstock can continuously and rotationally index a tool. In metal machine tools that perform
Can be equipped with rotary tools such as milling cutters, turn broaches, and drills, and can also be equipped with a turret head for turning, and the turret head and milling unit are integrated in a compound machine tool, simplifying the layout of the tool table on the machine base. .

In the third invention of the present invention, the tool headstock in the second invention has the same structure as the headstock of the first invention. Therefore, in the second invention, the rotary index uses an index plate. In addition, the structure of the tool headstock can be simplified and reduced in size.

A fourth invention of the present invention is, in a metal machine tool, provided with a workpiece headstock capable of continuously rotating and indexing a workpiece spindle, so that a drill, a milling cutter or the like is provided around the workpiece after turning. It is possible to obtain a metal machine tool provided with a device for performing complex machining.

In the fifth invention of the present invention, the work headstock in the third invention has the same structure as the headstock of the first invention. Therefore, in the fourth invention, the rotary index uses an index plate. The structure of the work headstock is small and simple.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a flow sheet showing an entire example 1 of the present invention.

FIG. 4 is a plan view of a second embodiment of the present invention.

FIG. 5 is a front view of a turning head.

FIG. 6 is a vertical cross-sectional view showing the attachment of the tool head adapter to the tool spindle.

FIG. 7 is a front view of a third embodiment of the present invention.

[Explanation of symbols]

 1 Tool Headstock Main Body 2 Tool Spindle 14 Driven Gear 17 Drive Shaft 21 Drive Gear 32 Shaft Coupling 33 Servo Motor 38 Drive Key 44 Brake Disc 48 Brake Shoe Assembly 49 Numerical Control Device 51 Encoder 60 Tool Headstock 61 Machine Base 62 Work Spindle Platform 64 Tailstock 66 Saddle 68,71 Servomotor 73 Tool unit storage 75 Swivel head 77 Turn broach 78 Turret head 79 Tool holding pin 82 Encoder 83 Chuck 84 Tailstock center 86,87 Adapter 89 Centering cylinder 91 Keyway 101 machine bed 102 tailstock 103 chuck 104 tailstock center 105 tool post 106 saddle 107 cross slide 108, 109 column 111 drill head 162 work headstock

Claims (5)

[Claims] 1. A main shaft rotatably supported by a headstock main body, a drive shaft supported so as to be rotationally driven orthogonally to the main shaft, a drive gear provided on the drive shaft, and a main shaft meshing with the drive gear. And a driven gear fixed to the main shaft, a disc fixed to the main shaft, a shoe capable of sandwiching the plate surface of the disc, a pressurizing means of the shoe, and a rotation angle control means of the main shaft. Characteristic headstock. 2. A metal machine tool comprising a workpiece headstock for gripping a workpiece and continuously rotating the workpiece, and a tool base for effecting machining by applying a tool cutting edge to the workpiece gripped by the workpiece headstock. A tool machine is a metal machine tool characterized in that a tool is arranged on the circumference of a tool carrier on which a tool rotates around a tool spindle, and the tool spindle is a tool spindle stock that can be indexed and continuously rotated. 3. The tool headstock includes a tool spindle rotatably supported by the tool headstock body, a drive shaft supported so as to be rotationally driven orthogonal to the tool spindle, and a drive gear provided on the drive shaft. A driven gear that meshes with the drive gear and is fixed to the tool spindle; a disc that is fixed to the tool spindle; a shoe that can sandwich the plate surface of the disc; a pressing means for the shoe; and a rotation angle of the tool spindle. The metal machine tool according to claim 2, further comprising a control unit. 4. A metal machine tool comprising a work headstock for gripping a work and continuously rotating the work, and a tool base for working a work held by the work headstock by applying a tool cutting edge to the work. The workpiece headstock is equipped with a workpiece spindle that supports the workpiece and drives the workpiece to rotate.The workpiece spindle stock is a workpiece spindle that allows the workpiece spindle to be indexed and continuously rotatable. A characteristic metal machine tool. 5. The workpiece headstock includes a workpiece spindle rotatably supported by the workpiece headstock body, a drive shaft supported so as to be rotationally driven orthogonally to the workpiece spindle, and a drive shaft. A driving gear provided with the driven gear, a driven gear meshed with the driving gear and fixed to a workpiece spindle, a disc fixed to the workpiece spindle, and a shoe capable of sandwiching the plate surface of the disc,
Pressurizing means of the shoe, rotation angle control means of the workpiece spindle,
The metal machine tool according to claim 4, further comprising: