JP2001129701A - Numerically controlled automatic lathe and method of machining workpiece by numerically controlled automatic lathe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a numerically controlled automatic lathe which is applicable to various composite machining and which is of simple construction, and a method of machining a workpiece by the lathe. SOLUTION: In a numerically controlled automatic lathe which is provided with a main spindle 21, a headstock 2, tool rests 3, 4 for holding tools T for machining a workpiece W held by a guide bush 22 for supporting the tip of the workpiece W and the main spindle 21, a driving device for moving the tool rests 3, 4 in relation to the workpiece held by the main spindle, and a numerical control device for controlling the driving of the driving device, the two comb-teeth tool rests 3, 4 for holding the tools T which are arranged rectilinearly in the direction crossing the axis of the main spindle 21, and either one of the comb-teeth type tool rests 3, 4 can be moved in the same direction as the axis of the main spindle by driving the driving device by orders from the numerical control device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of moving a tool post, rotating a spindle, or moving a spindle head by numerical control.
A numerical control automatic lathe in which a tip of the workpiece held on the spindle is supported by a guide bush, a part of the workpiece is projected from the guide bush, and the workpiece is processed by a tool held on the tool post; The present invention relates to a method of processing a workpiece using a control automatic lathe.

[0002]

2. Description of the Related Art Generally, a numerically controlled automatic lathe includes a rotatable spindle, a tool rest for holding a plurality of tools for working a workpiece held on the spindle, and a tool rest held on the spindle. And a numerical control device for controlling the driving of the driving device, and a plurality of tools held on the tool post by a command from the numerical control device. A predetermined tool is indexed to a processing position from among the tools, and a predetermined processing is performed on the workpiece by the tool. In such a numerically controlled automatic lathe, a plurality of the tool rests are provided, and different parts of the workpiece are simultaneously machined by a tool held by each tool rest, thereby reducing machining time. The ones we have designed are also widespread.

[0003] The tool rests provided in the numerically controlled automatic lathe include a turret type for holding tools in a ring or radial shape and a comb tooth type for holding tools arranged in a straight line. The turret-type tool rest has an advantage that a tool can be easily attached and detached and a large processing area can be obtained, but a large turret increases the size and weight of the machine. In addition, since the cutting edge of the tool is located far from the center of indexing of the tool, there is a disadvantage that it is difficult to perform high-precision indexing and the indexing time is long. Furthermore, in the turret type tool post, since the indexing axis of the tool is independent of the moving axis of the turret tool post, the position must be determined by programming for each axis, which makes programming complicated. There are drawbacks.

On the other hand, a comb-shaped tool rest has a small number of tools that can be held and a small interval between tools to be held. Therefore, although there is a restriction that the machining area cannot be made too large, the numerical control automatic lathe can be made lighter and more compact than the turret type, and it has the advantages of good tool indexing time and indexing accuracy. ing. Further, since the indexing axis of the tool and the moving axis of the comb-shaped tool rest are common, there is an advantage that programming is simpler than that of the turret tool rest.

[0005] Because of these advantages, numerically controlled automatic lathes having a comb-shaped tool rest are often used for processing relatively small workpieces with a small number of processing steps. Among them, particularly, a guide bush is provided in front of the headstock, and the tip of the workpiece is supported by the guide bush. The numerically controlled automatic lathe of the type that performs machining in the vicinity of the guide bush can minimize the deflection of the workpiece during machining, and can process long workpieces and reduce the diameter. Suitable for processing small objects.

FIGS. 10 to 12 show an example of combined machining in a numerically controlled automatic lathe having two comb-shaped tool rests (hereinafter referred to as “comb tool rests”) on both sides of a spindle axis. FIG. 10 is a schematic view showing an example of compound machining by a numerically controlled automatic lathe having two comb tooth turrets on both sides of a spindle axis. As shown in FIG. 10A, the workpiece W is indexed and rotated and positioned, and at the same time, the hob cutter T2 is arranged near the outer peripheral portion of the workpiece W and the drill T1 provided with a rotating device is rotated. The workpiece W is disposed so as to face the end face.

In this state, as shown in FIG.
When the headstock is moved in the Z direction and the workpiece W is sent out from the guide bush 22, gear teeth are formed on the outer peripheral portion by the hob cutter T2, and at the same time, the rotating drill T1 is rotated.
As a result, a hole is formed in the end face of the workpiece W. In this way, by feeding the headstock in the Z direction while indexing and rotating the workpiece W by a predetermined angle, gear teeth are formed on the outer peripheral portion of the workpiece W, and at the same time, the end face of the workpiece W is A plurality of holes can be formed.

However, in this combined machining, the optimum feed speed in the Z direction of the workpiece W for forming the gear teeth with the hob cutter T2 and the optimal workpiece speed for performing the drilling with the drill T1. Since the feed speed in the Z direction is not the same, there is a problem that an excessive load acts on either of the tools T1 or T2, and the tool life is remarkably reduced. FIG. 11 shows a state in which the tool of the double-comb tool post is slightly displaced in the axial direction (Z direction) of the spindle (the displacement is indicated by δ), and the spindle head is moved in the Z direction to move the guide bush 22.
It is a schematic diagram showing an example of combined processing which performs rough processing and finish processing simultaneously, sending out work W from.

As shown in FIG. 11 (a), when the workpiece is sent out from the guide bush 22, the roughing tool T1 first comes into contact with the tip Wa of the workpiece W to start the roughing. I do. At this time, the finishing tool T2 is located at a position farther than the workpiece W by the distance δ than the tool T1. When the feeding of the workpiece W from the guide bush 22 is continued, the tool T2 is moved to the tip Wa of the workpiece W.
And finish processing is started. In this way, as shown in FIG. 11B, the rough machining by the tool T1 and the finish machining by the tool T2 are simultaneously performed.

However, in this combined machining, when the rough machining tool T1 reaches the machining end Wb, the movement of the headstock is stopped to stop machining by the tool T1, and the comb tooth post is moved to a negative position. It is necessary to move the tool T1 in the X direction to retreat to a position where the tool T1 does not interfere with the workpiece W. Then, as shown in FIG. 11C, the feeding of the workpiece W in the Z direction is restarted, and the finishing by the tool T2 is performed up to the processing end Wc.

Also, in the combined machining shown in FIG.
As shown in (a), the workpiece W is moved by the movement of the headstock.
While feeding in the Z direction, the drill T1 held on one of the comb tooth turrets is rotated to perform drilling of the end face of the workpiece W, and at the same time, the tool T2 (end mill) of the other comb tooth turret is used. effect formation of the grooves W _S on the outer circumference of the workpiece W.

However, in order to efficiently perform the combined machining shown in FIG. 12, the condition is that the groove width L and the hole depth H are the same, and when the groove width L and the hole depth H are different (for example, Groove width L
> In the case of the hole depth H), the combined machining as described above lowers the machining efficiency.

That is, when the groove width L is larger than the hole depth H, the drilling can be completed by moving the headstock, but as shown in FIG. Since the feed amount of the workpiece W is insufficient, the processing of the groove having the groove width L cannot be completed. To complete the machining of groove W _S of the groove width L, it retracts the end mill T2 in the X-direction, to retract the headstock in the -Z direction, further drilling T1
After moving the end mill T2 to a position where it does not interfere with the workpiece W, the end mill T2 is moved in the −X direction to be positioned in the groove Wa,
By moving the headstock, the end mill T2 must be fed again along the groove Wa relative to the workpiece W.

As described with reference to FIGS. 10 to 12, in the conventional numerically controlled automatic lathe, the tool life is shortened by performing the complex machining, and the machining efficiency is rather reduced by performing the complex machining depending on the type of machining. Because there is something to do,
Prior to machining, it was necessary to surely determine the suitability of combined machining, determine the machining procedure, and then perform programming and the like.

[0015]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a wide variety of types when machining a workpiece with a numerically controlled automatic lathe having a comb-shaped tool rest. An object of the present invention is to provide a numerically controlled automatic lathe capable of performing machining in a complex manner, which is easy to assemble and program a processing procedure with a simple configuration, and to provide a method of processing a workpiece by the numerically controlled automatic lathe. And

[0016]

According to a first aspect of the present invention, there is provided a main shaft, a headstock rotatably supporting the main shaft and movable in the axial direction of the main shaft. A guide bush provided in front of the headstock and supporting a tip of a workpiece held by the spindle;
A tool rest for holding a plurality of tools for working the workpiece, a drive for moving the tool rest relative to the workpiece held on the spindle, and controlling the drive of the drive; In a numerically-controlled automatic lathe having a numerical control device, the numerically-controlled automatic lathe is disposed in one of the regions sandwiching the axis of the spindle,
A first comb tooth post that is movable at least in two orthogonal X and Y directions perpendicular to the axis of the main shaft, and is disposed in the other of the regions sandwiching the main shaft axis, and is disposed in the same direction as the main shaft axis; The second movable in the Z direction and the three axes of X and Y.
And a first comb tooth post and a second comb tooth post, wherein the first comb tooth post and the second comb tooth post are arranged so as to hold the tools linearly in the X direction or the Y direction. . According to this configuration, by moving one of the comb tooth turrets in the same direction as the main shaft axis, a comb tooth turret is provided,
In a numerically controlled automatic lathe in which the leading end of the workpiece is held by the guide bush, it becomes possible to perform complex machining that could not be performed until now.

According to a second aspect of the present invention, a second tool rest is disposed so as to be movable in the axial direction of the spindle so as to face the spindle stock, and the second tool rest is provided so as not to be movable in the axial direction of the spindle. And a tool for processing a workpiece held on the spindle of the second headstock. According to this configuration, the workpiece is held on the second headstock,
Since the workpiece can be machined by a tool attached to the comb tool post, it is possible to machine two workpieces at the same time. In addition, the workpiece is transferred from the headstock to the second headstock, and the second headstock is moved to a position where the workpiece can be machined with the tools of the two comb tooth turrets. It is possible to perform the same composite processing on both sides.

According to a third aspect of the present invention, in one of the comb tooth turrets movable in the axial direction of the spindle, a coolant injection nozzle for cooling a processing portion of the workpiece is provided instead of a tool. There is a configuration in which it is held. According to this configuration, the machining of the workpiece by the tool having the coolant outlet of the ejection nozzle attached to one of the turrets attached to the other turret without interfering with the workpiece, the tool, the spindle, or the like. It can be located very close to the point, improving the cooling efficiency with coolant such as coolant and air and removing chips, and reducing the amount of coolant used to reduce cost and environmental impact. it can.

According to a fourth aspect of the present invention, there is provided a method for processing a workpiece using the numerically controlled automatic lathe according to any one of the first to third aspects, wherein the first comb-shaped tool rest is provided. A tool and the tool of the second comb tool rest are positioned along the axis of the spindle, and both the comb tool rests are held so as not to move in the Z direction. The workpiece is moved in the Z direction to perform the first processing on the workpiece with the tool of the first comb tool post, and the second processing is performed on the workpiece with the tool of the second comb tool post. Performing processing, stopping the movement of the headstock when the tool of the first comb tool post reaches the processing end of the first processing section, and moving the second comb tool post. There is a method in which the tool is moved in the Z direction to feed the tool to the processing end of the second processing unit. According to this method, the second machining can be performed following the first machining, and even if the tool of the first comb tool post reaches the machining end of the workpiece, the headstock is moved. By stopping and moving the second comb tool rest in the axial direction of the spindle, the tool of the second comb tool rest can be maintained without waiting for the tool of the first comb tool rest to retreat from the workpiece. Can be performed up to the processing end.

According to a fifth aspect of the present invention, there is provided a method of machining a workpiece by the numerically controlled automatic lathe according to any one of the first to third aspects, wherein the tool and the tool of the first comb-shaped tool rest are provided. Positioning the tool of the second comb tooth post along the axis of the spindle, holding both the comb post so as not to move in the Z direction, and moving the headstock in this state. Performing a second processing on the workpiece with the tool of the first comb tooth post, and performing a first processing on the workpiece with the tool of the second comb tooth post; When the tool of the second comb tool rest reaches the processing end of the first machining, the second comb tool rest is moved in the same direction as the head stock in synchronization with the movement of the spindle. A method of feeding the tool of the first comb tooth post to the processing end of the second processing. That. According to this method, the second processing can be performed following the first processing. In this case, when the tool of the second comb tool rest reaches the processing end of the first machining, the second comb tool rest is synchronously moved in the same direction as the headstock, and thereby, The second processing by the tool of the first comb tool post can be performed up to the processing end without waiting for the tool of the second comb tool post to retreat from the workpiece.

According to a sixth aspect of the present invention, the first machining is a rough machining, the second machining is a finishing machining, and the rough machining tool for the first comb-shaped tool post is used in the first machining. A method of performing the first machining and the second machining in a state where the tool is disposed closer to the headstock in the Z direction than the finishing tool of the second comb-shaped tool post and the positional relationship between the two tools is maintained. There is. According to this method, when the rough machining tool reaches the machining end, the second comb tool post moves in the Z direction to complete the finishing machining. Roughing and finishing can be performed at the same time without waiting for evacuation.

Further, the invention according to claim 7 is the first invention.
Is a rough machining, the second machining is a finishing machining, and the tool for rough machining of the second comb tooth turret is more than the tool for finishing machining of the first comb tooth turret. This is a method in which the first machining and the second machining are arranged in the Z direction near the headstock and the positional relationship between the two tools is maintained. According to this method, when the rough machining tool reaches the machining end, the second comb tool post moves in the Z direction, and causes the rough machining tool to follow the movement of the workpiece. Therefore, the roughing and the finishing can be performed simultaneously without waiting for the roughing tool to be retracted from the workpiece.

The invention according to claim 8 is characterized in that, of the first and second comb tool rests, the comb tool rest which has reached the machining end first is used as the tool, and the tool is used as the tool rest. Simultaneously with reaching the processing end, the tool is moved in a direction to retreat from the workpiece to prepare for the next processing. According to this method, it is possible to perform indexing of the tool with one of the comb tooth turrets while performing the processing with the tool of the other comb turret, and quickly prepare for the next processing. be able to. In this case, there is an advantage that the indexing speed of the comb tool post is faster than that of the turret type tool post, and the machining time can be shortened accordingly.

According to a ninth aspect of the present invention, the headstock or the one of the comb teeth is provided after each of the tools reaches the machining end of the first machining and the machining end of the second machining, respectively. There is a method of performing continuous machining by moving the tool post in the opposite direction. According to this method, for example, when grooves are formed at two places on a workpiece with two end mills, it is possible to perform machining continuously without having to move the end mill away from the workpiece.

The invention according to claim 10 is a method wherein at least one of the tools is a rotary tool. The present invention is not limited to fixed tools such as cutting tools, hob cutters,
The present invention is also applicable to complex machining using a rotating tool such as an end mill, a drill, and a tap. In particular, it has been difficult for conventional numerically controlled automatic lathes to simultaneously perform drilling and tapping and threading with a tap and grooving with an end mill.However, one of the comb tooth turrets is the same as the headstock. By moving one of the comb tool rests in synchronization with the movement of the headstock, machining with these rotary tools and cutting with an end mill or the like can be performed simultaneously.

According to an eleventh aspect of the present invention, when the tool of the first comb tooth turret and the tool of the second comb tooth turret are processed by the tool, A method is provided in which the predetermined distance position is shifted in the Z direction so that the bending of the processing point of the workpiece is minimized. According to this method, based on the difference in the magnitude of the main component force and the back component force of each tool, the arrangement position of the tool is shifted by a predetermined distance in the Z direction, so that the processing point of the workpiece by each tool is Deflection can be minimized. Therefore, it is suitable for a case where a thin object that is likely to be bent is processed or a case where high accuracy is required.

The twelfth aspect of the present invention relates to the first to third aspects.
A method of processing a workpiece by a numerically controlled automatic lathe according to any one of the above, wherein the workpiece having an outer peripheral portion and an end face intersecting with an axis of the spindle is held by the spindle.
Moving the first comb tool post to position the rotary tool on the end face of the workpiece, and moving the second comb tool post to position the tool on the outer peripheral portion; While processing the outer peripheral portion with the tool of the second comb tooth post while rotating the workpiece by the rotation of, the processing position at a position separated from the axis of the main shaft by the rotation of the main shaft is The locus to be drawn is circularly interpolated, and the position of the rotary tool with respect to the processing position of the workpiece is maintained by moving the first comb tooth post in the X and Y directions based on the data of the circular interpolation. While the workpiece is relatively moved in the Z direction with respect to the tool of the first comb-shaped tool rest, a hole is drilled in the end face. According to this method, it is possible to perform the processing of the outer peripheral portion while rotating the workpiece along with the main shaft, and at the same time, it is possible to perform the drilling on the end face of the workpiece by a drill or the like. The relative positioning of the rotary tool with respect to the rotating workpiece may be performed by circularly interpolating the trajectory of the processing position of the workpiece due to the rotation of the spindle. Circular interpolation can be performed by simple arithmetic processing based on the angular velocity of the spindle and the distance from the axis of the spindle to the machining position. Therefore, a complicated device for rotating the rotary tool in synchronization with the rotation of the main spindle is not required, and the numerically controlled automatic lathe does not become large and complicated.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. First, the configuration of a numerically controlled automatic lathe of the present invention will be described with reference to FIG. An X-direction guide rail 35 extending in the X-direction and Z-direction guide rails 23 and 49 extending in the Z-direction are provided on the bed 1 of the numerically controlled automatic lathe. A saddle 33 is movably provided on the X-direction guide rail 35.
3 is provided with a support 32 on one side thereof.
On one side surface, a Y-direction guide rail 30a extending in the Y direction is provided upright.

A first tool post 3 which is a comb tool post is provided movably along the Y-direction guide rail 30a. Reference numeral 31 denotes a drive mechanism for moving the first tool rest 3. The first tool rest 3 holds a plurality of tools T in the Y direction by a tool holder 38.
The tool T is movable in the X and Y directions together with the first tool rest 3.

The headstock 2 is provided movably along the Z-direction guide rail 23. The headstock 2 rotatably supports a spindle 21 having on its axis a through hole through which the workpiece W can be inserted. The workpiece W is inserted through the through hole and extends in the Z direction from the tip of the main shaft 21. The tip is centered by a guide bush 22 which is a workpiece holding member.
Will be retained. In the case where a long workpiece W as shown in the drawing is machined, if the vicinity of the machined portion by the tool T is held by a workpiece holding member such as the guide bush 22, the machined work at the machined portion is performed. Deflection of the object can be minimized, which is advantageous for high-precision machining.

The second saddle 43 is a Z-direction guide rail 4
9 are provided movably. This saddle 43
Is provided on another saddle (not shown) that moves while being guided by the Z-direction guide rail 49, and is movable in the X-direction along the X-direction guide rail 45 provided on the other saddle. Further, a Y-direction guide rail 40a extending in the Y direction is provided on one side surface of the saddle 43,
The second tool rest 4 is provided movably along the Y-direction guide rail 40a. Reference numeral 41 denotes a drive mechanism for moving the second tool rest 4. A plurality of tools T are held on the second tool rest 4 by a tool holder 48, and the tool T is movable with the second tool rest 4 in three directions of X, Y and Z.

The amount of movement of the saddle 33, the first tool rest 3, the headstock 2, the saddle 43 and the second tool rest 4 is determined by the linear scales 36 and 46 in the X direction and the linear scale 3 in the Y direction.
7, 47, and the Z-direction linear scales 24 and 44 are used to calculate the processing site of the workpiece W and the position coordinates of the tool T by calculation.

The numerically controlled automatic lathe shown in FIG. 1 is further provided with a second headstock 5 opposed to the headstock 2, and the processing of one side of the workpiece W held on the headstock 2 is completed. Later, the workpiece is transferred to the spindle 51 of the second headstock 5 by moving the headstock 2 in the Z direction, and the tool T of the second tool rest 4 that can move in the Z direction is used to move the other side of the workpiece W. Processing can also be performed.

FIGS. 2 and 3 show an example of combined machining that can be performed by the numerically controlled automatic lathe shown in FIG. In addition,
In FIGS. 2 and 3, for convenience of description, the first turret 3
The tool T on the side is indicated by adding a suffix “1” to the second tool post 4.
It is assumed that the suffix “2” is added to the tool T on the side. In the combined machining shown in FIG. 2, the outer peripheral surface of the workpiece W is roughly machined as the first machining with the tool T1 of the first tool rest 3, and at the same time, the portion where the rough machining is finished is performed on the second tool rest 4. Tool T
In 2, a finishing process, which is a second process, is performed.

The main shaft 21 rotates while holding the workpiece W in a state where the guide bush 22 supports the distal end side. First, the first tool post 3 and the second tool post 4 are provided with a tool T1 for performing rough machining and a tool T2 for performing finish machining.
Is indexed to a predetermined position. Then, the first tool post 3 and the second
The tool T is moved by the movement of the tool rest 4 in the X and Y directions.
The tools T1 and T2 are positioned at positions where the cutting edges of the workpieces 1 and T2 cut a predetermined dimension from the outer peripheral surface of the workpiece W. At this time, the tool T2 is located at a position farther from the workpiece W by a shift amount δ in the Z direction than the tool T1 so that the finish machining is performed by the tool T2 immediately after the rough machining by the tool T1. .

When the headstock 2 moves in the Z direction, the workpiece W is sent out from the guide bush 22 and first the tool T
1 comes into contact with the front end Wa of the workpiece W to start roughing (the state shown in FIG. 2A). By continuing to move the headstock in the Z direction, the tool T2 also comes into contact with the workpiece W, and rough processing and finishing processing are performed on the workpiece W simultaneously (the state shown in FIG. 2B). When the tool T1 reaches the rough end Wb of the workpiece W (the state shown in FIG. 2C), the headstock 2
Is stopped in the Z direction, and the second tool rest 4 is moved in the Z direction.
The tool T2 is moved by an amount corresponding to the deviation amount δ to move the tool T2 to the processing end Wc of the finishing processing, and the finishing processing is completed (a state shown by a virtual line in FIG. 2C).

Next, when performing another processing such as changing the radial dimension of the workpiece W, the first tool post 3
And / or moving the second tool rest 4 in the −X direction and the + X direction to move the tool T1 and the tool T2 away from the workpiece W,
Select the next tool. At this time, the tools T1 and T2 are respectively indexed in the Y direction to select a predetermined tool, and the selected new tools T1 and T2 are moved in the + X direction and the −X direction until the new tools T1 and T2 come into contact with the workpiece W to perform machining. Do. In the processing example shown in FIG. 2, the tool T1 is retracted in the X direction linearly from the processing end Wb simultaneously with the start of movement of the second tool rest 4 in the Z direction (the position shown by a virtual line in FIG. 2C). To the next work such as indexing of the tool at that position, and then move straight again to the work W to start the work of the work W. Efficiency can be improved. Further, the first tool post 3 and the second tool post 4 which are the comb tool post can select a predetermined tool in a shorter time as compared with the turret type tool post. There is also the advantage that it can be shortened.

In the conventional numerically controlled automatic lathe having a guide bush, both of the workpieces cannot be fed due to the nature of the guide bush, that is, the fed workpiece W can be pulled back in the opposite direction. Since there was no machining, it was not possible to machine by reciprocating the tool on the outer peripheral surface of the workpiece W, and in the machining in which the machining order was limited and a plurality of machinings had to be performed in the same location, complicated procedures and programs were required. Was needed. In the numerically controlled automatic lathe according to the present invention, since the second tool rest 4 can move in the Z direction, the tool can be reciprocated on the outer peripheral surface of the workpiece to be processed, and is restricted by the processing sequence. In addition, the planning and programming of the machining procedure are facilitated.

In the machining shown in FIG. 2, the bending moment generated in the workpiece W by the main component and the back force of the tool T1, and the bending moment generated in the workpiece W by the main component and the back force of the tool T2. Since the bending moments act so as to cancel each other out, it is possible to minimize the deflection of the workpiece W during processing by calculating the amount of deviation δ taking into account the difference in the magnitude of these forces. Therefore, there is an advantage that high-precision processing can be performed. Such a processing method is particularly advantageous when processing a small-diameter workpiece W in which bending is likely to occur.

In the machining shown in FIG. 3, the workpiece W is formed by the drill T1 on the first tool rest 3 side and the end mill T2 on the second tool rest 4 side.
Performing drilling of the outer peripheral surface of the (shown by reference numeral W _H holes) and grooving (indicating the groove by reference numeral W _S). The headstock 2 is Z
The workpiece W is intermittently moved in the direction, is positioned and stopped at a predetermined position, and at this position, the workpiece W is drilled by the drill T1. In the first drilling shown in FIG. 3A, while the drill T1 is drilling the workpiece W, the end mill T2 performs the grooving with the movement of the second tool rest 4 in the Z direction. ing.

When the first drilling operation is completed and the headstock 2 moves in the Z direction to perform the next drilling operation, the second tool rest 4 moves the headstock 2 while ensuring the optimum feed of the end mill T2. It moves in synchronization with the movement in the Z direction. The numerical control device (not shown) always determines the position of the end mill T2 on the workpiece W from the relative movement of the headstock 2 and the second tool rest 4 in the Z direction. While the headstock 2 is moving, the end mill T2
There it reaches the end of groove W _S (processing end) (the state of FIG. 3 (b)), by moving the second tool rest 4 in synchronization with the movement of the headstock 2, an end mill T2 relative to the workpiece W Is set to 0 (state of FIG. 3 (c)). As described above, by constantly keeping the moving speed of the second tool rest 4 in the Z direction in relation to the feed speed of the headstock 2, the end mill T
The optimum feed rate for the machining of No. 2 can always be maintained.

It is also possible to mount an end mill on the first tool rest 3 side and attach a drill on the second tool rest 4 side to process the workpiece W as shown in FIG. In this case, a groove is machined by an end mill by moving the headstock 21 in the Z direction, and drilling is performed while the drill is moved synchronously with the headstock 21. By synchronizing the second tool rest 4 with the movement of the headstock 21, the relative speed between the drill and the workpiece W is reduced to zero.
Therefore, the drilling of the workpiece W can be performed by a drill.

Next, another embodiment of the combined machining according to the present invention will be described with reference to FIGS. FIG.
And FIG. 7 is a simplified version of the numerically controlled automatic lathe, but since the basic configuration is the same as that of the numerically controlled automatic lathe shown in FIG. 1, the corresponding parts are denoted by the same reference numerals. And a detailed description is omitted.

In the numerically controlled automatic lathe shown in FIG. 4, a first tool post 3 holds a drill T4 as a rotary tool, and a second tool post 4 holds a hob cutter T3 as a rotary tool. In the combined machining of this embodiment, a hole W2a is formed in the end face of the workpiece W2 by the drill T4 while forming the gear teeth W2b on the outer peripheral portion of the workpiece W2 by the hob cutter T3, as shown in FIG. The workpiece W2 is formed.

First, the hob cutter T3, which is a rotary tool, is indexed to a predetermined position by the indexing operation of the second tool rest 4. In addition, by the indexing operation of the first tool post 3, the drill T4, which is a rotary tool, is indexed at a predetermined position. The first tool rest 3 and the second tool rest 4 are moved in the X and Y directions to position the drill T4 and the hob cutter T3 with respect to the workpiece W2, and the main shaft 21 is rotated to rotate the workpiece W2.
To rotate.

In this state, the work W2 is rotated at a rotation speed suitable for gear cutting of the work W2, and further, the rotation speed is adjusted to a rotation speed suitable for boring the end face of the work W2. Then, the drill T4 is rotated relative to the workpiece W2. Then, the hob cutter T3 is moved in the X direction to perform the gear cutting. While rotating the workpiece W,
When drilling is performed at a processing position on the end face provided at a position separated from the axis of the spindle, the workpiece W2
It is necessary to always keep the drill T4 at a constant position with respect to the above-mentioned processing position. As a means for keeping the drill T4 constant with respect to the processing position of the workpiece W2, for example, the drill T
It is conceivable to provide a rotating device for rotating the workpiece 4 synchronously with the workpiece W2 on the second tool rest 4. In this embodiment, the position of the drill T4 is made to follow the processing position of the workpiece W2 by performing circular interpolation on the trajectory of the processing position. According to such circular interpolation, it is possible to perform drilling on the end face of a rotating workpiece only by adding a simple machining program without complicating the configuration of the automatic numerical control lathe. At this time, the movement speed of the workpiece W2 in the Z direction accompanying the movement of the headstock 2 is controlled so as to be optimal for drilling with the drill T3. In addition, the movement speed of the second tool rest 4 in the Z direction is adjusted with respect to the movement speed of the headstock 2 so that the movement of the workpiece W2 in the Z direction is made in the Z direction in the hobbing cutter T3. Control is performed to obtain the optimum processing speed.

In the numerically controlled automatic lathe shown in FIG. 4, a workpiece as shown in FIG. 6 can also be formed by combined machining. The processing procedure of the workpiece W3 shown in FIG. 6 will be described below. The spindle 21 is indexed and rotated, and the workpiece W3 is rotated.
Is directed toward the first tool post 3.

The first tool rest 3 and the second tool rest 4 are
By the indexing operation, an end mill (not shown) and a center drill, which are rotary tools, are indexed at predetermined positions. 2nd turret 4
Calculates the center drill and moves in the X, Y, and Z directions to position the center drill at a predetermined position opposite the end face of the workpiece W3. On the other hand, the first tool post 3 indexes an end mill, moves in the X and Y directions, and positions the end mill above the workpiece W3.

Next, the end mill is moved in the X direction to form a groove W3a having a predetermined depth, and the second tool post 4
Is moved in the Z direction to form a center hole in the end face of the workpiece W3. After these processes are completed, the first tool rest 3 and the headstock 2 are moved to move the end mill and the center away from the workpiece W3.

The first tool rest 3 and the second tool rest 4 index the next tool, for example, a drill for forming the hole W3b in the groove W3a and a drill for forming the hole W3c in the center hole by the indexing operation. . The first turret 3 has X,
The drill is moved in the Y direction to position the drill at a predetermined position relative to the groove W3a, and the second tool rest 4 moves in the X, Y, and Z directions to position the drill on the same axis as the center hole. Then, the first tool post 3 is moved in the X direction to form the hole W3b, and at the same time, the second tool post 4 is moved in the Z direction to form the hole W3c. Thereafter, even in the case of further performing thread cutting, counterbore, and the like, by repeating the above procedure, it is possible to simultaneously perform a plurality of processes on different portions of the workpiece W3.

According to the present invention, there is an advantage that a plurality of processings conventionally performed independently can be performed simultaneously. That is, a conventional numerically controlled automatic lathe having a first tool rest and a second tool rest movable in the X and Y directions and a headstock movable in the Z direction processes a workpiece as shown in FIG. To do this, a groove W3a is formed by moving the first tool rest in the X and Y directions, and after the completion of this processing, the first tool rest is moved in the X and Y directions to move the end mill away from the workpiece W3. Thereafter, the drill is positioned at a position opposite to the end face of the workpiece W3 by moving the second tool rest in the X and Y directions, and the headstock is moved toward the drill to form the hole W3c. Was.

In the present invention, the comb-shaped second tool rest 4 is
Since it is also possible to move in the direction, it is possible to perform these plural processes at the same time, and it is possible to greatly reduce the processing time.

FIG. 7 shows a numerically controlled automatic lathe according to still another embodiment of the present invention. The automatic numerical control lathe of this embodiment has a second headstock 5 that is movable along a Z-direction guide rail 53. Spindle 5 of second headstock 5
Numeral 1 is on the same axis as the spindle 21 of the headstock 2, so that the workpiece W can be exchanged between the spindle 21 and the spindle 51, and both-side processing of the workpiece can be performed. . In this numerically controlled automatic lathe, tools T5 and T6 such as end mills and drills for processing the workpiece held on the spindle 51 are held in the tool holder 48 of the second tool rest 4.

In the numerically controlled automatic lathe shown in FIG. 7, not only can the work W3 shown in FIG. 6 be processed, but also the work W4 shown in FIG. 8 can be processed. FIG.
The workpiece W4 shown in FIG. 6 is a groove W3 of the workpiece W3 in FIG.
a, holes 3b and 3c are formed at both ends. The processing of the groove W3a and the holes 3b and 3c on one side is the same as that described above, and will not be described.

In order to machine the groove W3a and the holes 3b and 3c on the other side, before cutting the workpiece W4 from the material, the groove 3a and the hole 3b are formed by the tool of the first tool post 3 in the same procedure as described above. After that, the workpiece W4 is cut off from the material and transferred to the spindle 51 of the second headstock 5,
Tools T5 such as center drills and drills facing the spindle 51
The hole W3b can be machined at T6.

Further, the first tool rest 3, the headstock 2 and the second
If the headstock 5 has a sufficient stroke in the Z direction,
The second tool rest 4 is moved in the Z direction with the headstock 2 retracted from the processing area A, and the tools T5 and T6 held by the second tool holder 48 are positioned in the processing area A, and By moving the headstock 5 in the Z direction to position the workpiece W3 held on the spindle 51 in the processing area A, the same processing as described above can be performed with the first and second toolheads 3 and 4. It can be carried out.

FIG. 9 is a schematic view showing an embodiment in which an injection nozzle N for injecting a coolant instead of the tool T is attached to the second tool rest 4. When processing the workpiece W with the tool T, the processing point P is efficiently cooled and chips are efficiently removed, thereby reducing the amount of coolant such as coolant and cooling air, and reducing the processing accuracy. It is preferable to improve the cost, reduce the cost, and minimize the impact on the environment. For this purpose, it is preferable that the coolant or the cooling air be intensively sprayed from the closest position to the processing point P by the spray nozzle.

In a conventional numerically controlled automatic lathe using a combination of a tool rest movable in the X and Y directions, the injection nozzle easily interferes with the workpiece W, the tool T or the main shaft 21 and moves the injection nozzle closer to the processing point P. Even so, there is a limit,
It has been difficult to perform efficient cooling and the like.

In the present invention, since the second tool rest 4 is movable in the Z direction, as shown in FIG. 8, the injection nozzle is directed from the position away from the workpiece W on the spindle axis toward the processing point P. It becomes possible to make the injection port Na of N closer, and it becomes possible to inject coolant or the like from a position very close to the processing point P without interfering with the workpiece W, the tool T or the main shaft 21.

Although the preferred embodiment of the present invention has been described, the present invention merely enables the second turret to move in the Z direction, and various types of the conventional numerically controlled automatic lathe which are difficult. Can be combined. The present invention can also be applied to composite processing other than those described above, and by applying the present invention to these composite processing, the processing time can be significantly reduced. In the above description, only the second tool rest 4 is movable in the Z direction. However, both the first tool rest and the second tool rest may be movable in the Z direction.

[0061]

According to the present invention, at least one of the comb-shaped tool rests can be moved in three directions of X, Y, and Z axes, and it is possible to combine various kinds of processing which has been difficult until now. ,
The processing can be performed by a simple processing procedure and programming, so that the processing time of the workpiece can be reduced and the processing cost can be significantly reduced. Further, since the numerically controlled automatic lathe of the present invention is premised on having a comb-shaped tool post, the numerically controlled automatic lathe is small, light,
Space can be saved, and processing accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating a configuration of a numerically controlled automatic lathe according to the present invention.

FIG. 2 is a diagram illustrating an example of combined machining using the numerically controlled automatic lathe of FIG. 1;

FIG. 3 is a view for explaining another example of combined machining using the numerically controlled automatic lathe of FIG. 1;

FIG. 4 is a plan view of a numerical control lathe for performing another combined machining according to the present invention.

5A and 5B show an example of a workpiece that can be formed by the numerically controlled automatic lathe of FIG. 4, wherein FIG. 5A is a cross-sectional side view of the workpiece, and FIG. 5B is a left side view of FIG. .

6A and 6B show another example of a workpiece that can be formed by the numerically controlled automatic lathe of FIG. 4, wherein FIG. 6A is a side view of the workpiece, and FIG. FIG.

FIG. 7 is a plan view of a numerically controlled automatic lathe for performing still another combined machining of the present invention.

8 is a diagram showing an example of a workpiece to be processed by the numerically controlled automatic lathe of FIG. 7;

FIG. 9 shows that a coolant injection nozzle is used instead of a tool.
3 is a schematic diagram illustrating an embodiment in which a workpiece is machined by being attached to a tool post.

FIG. 10 is a view showing an example of compound machining by a numerically controlled automatic lathe having two comb tooth turrets on both sides of a spindle axis according to a conventional example of the present invention.

FIG. 11 is a view showing another example of the combined machining according to the conventional example of the present invention.

FIG. 12 is a view showing still another example of the combined machining according to the conventional example of the present invention.

[Explanation of symbols]

Reference Signs List 1 bed 2 headstock 3 first turret (first comb turret) 4 second turret (second comb turret) 5 second headstock 21 spindle 22 guide bush 35, 45 X-direction guide rail 30a, 40a Y-direction guide rail 23, 49 Z-direction guide rail W Workpiece Wb, Wc Work end W _S groove W _H hole T Tool N Injection nozzle

[Procedure amendment]

[Submission date] November 19, 1999 (1999.11.
19)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003] The tool rests provided in the numerically controlled automatic lathe include a turret type for holding tools in a ring or radial shape and a comb tooth type for holding tools arranged in a straight line. The turret-type tool rest has an advantage that a tool can be easily attached and detached and a large processing area can be obtained, but a large turret increases the size and weight of the machine. Further, since the cutting edge of the tool is located far from the center of the indexing rotation for indexing the tool, there is a disadvantage that it is difficult to perform the indexing with high accuracy and the indexing time is long. further,
In the turret type turret, the indexing rotary axis of the tool is independent of the moving axis of the turret turret, so the position must be determined by programming for each axis, which disadvantageously complicates programming. There is.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction contents]

According to a fourth aspect of the present invention, there is provided a method for processing a workpiece using the numerically controlled automatic lathe according to any one of the first to third aspects, wherein the first comb-shaped tool rest is provided. A tool and the tool of the second comb tool rest are positioned along the axis of the spindle, and both the comb tool rests are held so as not to move in the Z direction. The workpiece is moved in the Z direction to perform the first processing on the workpiece with the tool of the first comb tool post, and the second processing is performed on the workpiece with the tool of the second comb tool post. Machining, and the tool of the first comb-shaped tool post is subjected to the first machining.
The movement of the headstock when reaching the processed end portion of the parts is stopped, how to send the tool by moving the second comb tool rest in the Z direction to the processing end of the second processing unit There is. According to this method, the second machining is performed following the first machining.
Can be performed, and even if the tool of the first comb tool post reaches the processing end of the workpiece, the headstock is stopped and the second comb tool post is moved in the spindle axis direction. By moving the tool, the second comb tool rest can be moved by the second comb tool rest without waiting for the tool of the first comb tool rest to retreat from the workpiece.
Can be performed up to the processing end.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction contents]

According to a fifth aspect of the present invention, there is provided a method of machining a workpiece by the numerically controlled automatic lathe according to any one of the first to third aspects, wherein the tool and the tool of the first comb-shaped tool rest are provided. Positioning the tool of the second comb tooth post along the axis of the spindle, holding both the comb post so as not to move in the Z direction, and moving the headstock in this state. Performing a second processing on the workpiece with the tool of the first comb tooth post, and performing a first processing on the workpiece with the tool of the second comb tooth post; When the tool of the second comb tool rest reaches the machining end of the first machining section , the second comb tool rest is moved in the same direction as the head stock in synchronization with the movement of the spindle. , The first
This is a method of feeding the tool of the comb tooth post to the processing end of the second processing section . According to this method, the second processing can be performed following the first processing. in this case,
When the tool of the second comb tool rest reaches the machining end of the first machining section , the second comb tool rest is synchronously moved in the same direction as the headstock to move the second comb tool rest. The second machining by the tool of the first comb tool rest can be performed up to the machining end without waiting for the tool of the comb tool rest to be retracted from the workpiece.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

[0024] The invention according to claim 9, after both the tool, respectively, reaches the working end and working end of the second processing unit <br/> of the first processing portion, said headstock Alternatively, there is a method in which the one comb tooth post is moved in the opposite direction to perform continuous machining. According to this method, for example, when grooves are formed at two places on a workpiece with two end mills, it is possible to perform machining continuously without having to move the end mill away from the workpiece.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0027

[Correction method] Change

[Correction contents]

The twelfth aspect of the present invention relates to the first to third aspects.
A method of processing a workpiece by a numerically controlled automatic lathe according to any one of the above, wherein the workpiece having an outer peripheral portion and an end face intersecting with an axis of the spindle is held by the spindle.
Moving the first comb tool post to position the rotary tool on the end face of the workpiece, and moving the second comb tool post to position the tool on the outer peripheral portion; While processing the outer peripheral portion with the tool of the second comb tooth post while rotating the workpiece by the rotation of, the processing position at a position separated from the axis of the main shaft by the rotation of the main shaft is The locus to be drawn is circularly interpolated, and the position of the rotary tool with respect to the processing position of the workpiece is maintained by moving the first comb tooth post in the X and Y directions based on the data of the circular interpolation. While the workpiece is relatively moved in the Z direction with respect to the tool of the first comb-shaped tool rest, a hole is drilled in the end face. According to this method, it is possible to perform the processing of the outer peripheral portion while rotating the workpiece along with the main shaft, and at the same time, it is possible to perform the drilling on the end face of the workpiece by a drill or the like. The relative positioning of the rotary tool with respect to the rotating workpiece may be performed by circularly interpolating the trajectory of the processing position of the workpiece due to the rotation of the spindle. Circular interpolation can be performed by arithmetic processing based on the angular velocity of the spindle and the distance from the axis of the spindle to the machining position
It is. Therefore, in synchronization with the rotation of the spindle , the spindle
Rotate the rotary tool about an axis, thereby
The tip of the rotary tool is maintained at the processing position of the rotating workpiece
No special device is required, and the numerically controlled automatic lathe does not become large and complicated.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction contents]

When the headstock 2 moves in the Z direction, the workpiece W is sent out from the guide bush 22 and first the tool T
1 comes into contact with the front end Wa of the workpiece W to start roughing (the state shown in FIG. 2A). By continuing to move the headstock in the Z direction, the tool T2 also comes into contact with the workpiece W, and rough processing and finishing processing are performed on the workpiece W simultaneously (the state shown in FIG. 2B). When the tool T1 reaches the machining end Wb of the rough machining portion in the workpiece W (the state shown in FIG. 2C), the movement of the headstock 2 in the Z direction is stopped, and the second tool rest 4 is moved in the Z direction. The tool T2 is moved to the machining end Wc of the finishing portion by moving the tool T2 by an amount corresponding to the deviation amount δ, and finishing is completed (the state shown by a virtual line in FIG. 2C).

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction contents]

When the first drilling operation is completed and the headstock 2 moves in the Z direction to perform the next drilling operation, the second tool rest 4 moves the headstock 2 while ensuring the optimum feed of the end mill T2. It moves in synchronization with the movement in the Z direction. The numerical control device (not shown) always determines the position of the end mill T2 on the workpiece W from the relative movement of the headstock 2 and the second tool rest 4 in the Z direction. While the headstock 2 is moving, the end mill T2
There is moved if reaches the end of groove W _S (processing end) (the state of FIG. 3 (b)), the second tool rest 4 in synchronization with the movement in the Z direction of the headstock 2 in the Z direction, the The relative speed of the end mill T2 to the workpiece W is set to 0 (the state shown in FIG. 3C). As described above, by constantly keeping the moving speed of the second tool rest 4 in the Z direction in relation to the feed speed of the headstock 2, it is possible to always keep the optimum feed speed for machining the end mill T2.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction contents]

In this state, the work W2 is rotated at a rotation speed suitable for gear cutting of the work W2, and further, the rotation speed is adjusted to a rotation speed suitable for boring the end face of the work W2. Then, the drill T4 is rotated relative to the workpiece W2. Then, the hob cutter T3 is moved in the X direction to perform the gear cutting. While rotating the workpiece W,
When drilling is performed at a processing position on the end face provided at a position separated from the axis of the spindle, the workpiece W2
It is necessary to always keep the drill T4 at a constant position with respect to the above-mentioned processing position. As a means to keep always constant with respect to the processing position of the workpiece W2 that is rotating the tip of the drill T4, for example, holds the drill T4 to the second tool rest 4
Around the axis of the spindle in synchronization with the rotation of the spindle.
It is conceivable to provide a rotating device for rotating the rill T4 . In this embodiment, the axis is away from the axis of the spindle.
By locus of the processing position in the circular interpolation place, thereby follow the machining position of the workpiece W2 to position the drill T4. According to such circular interpolation, without complicating the mechanical configuration of the numerically controlled automatic lathe,
Drilling can be performed on the end face of the rotating workpiece only by adding a simple processing program.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0061

[Correction method] Change

[Correction contents]

[0061]

According to the present invention, at least one of the comb-shaped tool rests can be moved in three directions of X, Y, and Z axes, and it is possible to combine various kinds of processing which has been difficult until now. ,
Can now be performed by simple processing procedures and programming, it is possible to greatly reduce the processing costs by shortening the machining time of the workpiece. Further, since the numerically controlled automatic lathe of the present invention is premised on having a comb-shaped tool post, the numerically controlled automatic lathe is small and light.
The amount and space can be reduced , and the processing accuracy can be improved.

Claims (12)

[Claims] 1. A spindle, a headstock rotatably supporting the spindle and movable in an axial direction of the spindle, and a tip of a workpiece provided in front of the spindle head and held by the spindle. A guide bush to be supported, a tool rest for holding a plurality of tools for working the work piece, a driving device for moving the tool rest with respect to the work piece held on the spindle, A numerically controlled automatic lathe having a numerical control device for controlling the driving of the device, wherein the numerically controlled automatic lathe is disposed on one side of the axis of the spindle, and is movable in at least two orthogonal X and Y directions orthogonal to the axis of the spindle. A second comb-type tool rest which is arranged on the other side of the axis of the main shaft and is movable in the same Z-direction as the axis of the main shaft and in the three directions of X and Y; The first comb tooth turret And the second comb-shaped tool rest holds the tools arranged linearly in the X direction or the Y direction. 2. A second headstock is movably disposed in the Z direction so as to face the headstock, and is held by the second comb tooth post on the main shaft of the second headstock. The numerically controlled automatic lathe according to claim 1, further comprising a tool for processing the workpiece. 3. The coolant injection nozzle for cooling a processing portion of the workpiece, instead of a tool, is held on the second comb-shaped tool rest. Numerically controlled automatic lathe. 4. The method for processing a workpiece by the numerically controlled automatic lathe according to claim 1, wherein the tool of the first comb tooth post and the second comb tooth cutter. While positioning the tool of the table along the axis of the spindle, holding both of the comb tooth turrets so as not to move in the Z direction, and moving the spindle head in the Z direction in this state, 1
Performing a first processing on the workpiece with a tool of a comb-type tool post, and performing a second processing on a workpiece with a tool of the second comb-type tool; When the tool of the tool rest reaches the working end of the first working part, the movement of the headstock is stopped, and the second comb tool rest is moved in the Z direction to move the tool. 2. A method for processing a workpiece by a numerically controlled automatic lathe, wherein the workpiece is sent to a processing end of a processing section. 5. The method for processing a workpiece by the numerically controlled automatic lathe according to claim 1, wherein the tool of the first comb tooth post and the second comb tooth cutter. Positioning the tool of the table along the axis of the spindle, holding both of the comb tooth turrets so as not to move in the Z direction, and moving the spindle head in this state, the first comb Performing a second processing on the workpiece with the tool of the tool post, and performing a first processing on the workpiece with the tool of the second comb tool; and the second comb tool. When the second tool reaches the machining end of the first machining, the second comb tool rest is moved in the same direction as the spindle head in synchronization with the movement of the spindle, and the first comb tooth is moved. Feeding the tool of the tool post to the processing end of the second processing, Machining method of the workpiece by the board. 6. The first machining is a rough machining, the second machining is a finishing machining, and the tool of the first comb tool post is more than the tool of the second comb tool post. 5. The numerically controlled automatic lathe according to claim 4, wherein the first processing and the second processing are performed in a state where the tools are arranged near the headstock in the Z direction and the positional relationship between the two tools is maintained. 6. The processing method of the workpiece. 7. The first machining is a finishing machining, the second machining is a rough machining, and the tool of the second comb tool post is more than the tool of the first comb tool post. The numerically controlled automatic lathe according to claim 5, wherein the first machining and the second machining are performed in a state where the tools are arranged near the headstock in the Z direction and the positional relationship between the two tools is maintained. The processing method of the workpiece. 8. The first and second comb tooth turrets, wherein the tool turret that the tool has reached the processing end first is used as the tool reaches the processing end. 5. The method according to claim 4, wherein the tool is moved in a direction in which the tool is retracted from the workpiece, and preparations for a next processing are performed.
7. A method for processing a workpiece by the numerically controlled automatic lathe according to any one of items 7. 9. The tools of both said comb tooth turrets are respectively
After reaching the processing end of the first processing and the processing end of the second processing, the headstock or the second comb tooth post is moved in the opposite direction along the Z direction to perform continuous processing. A method for processing a workpiece by a numerically controlled automatic lathe according to any one of claims 4 to 7. 10. The method for machining a workpiece by a numerically controlled automatic lathe according to claim 4, wherein at least one of said tools is a rotary tool. 11. The tool of the first comb tooth turret and the tool of the second comb tooth turret are configured such that, when processing is performed by the tool, a processing point of the workpiece by each of the tools. 5. The apparatus according to claim 4, wherein a predetermined distance position is shifted in the Z direction so that the deflection of each of the first and second positions is minimized.
A method for processing a workpiece by a numerically controlled automatic lathe according to any one of claims 10 to 10. 12. A method for processing a workpiece by the numerically controlled automatic lathe according to claim 1, wherein the workpiece having an outer peripheral portion and an end face intersecting with an axis of the main shaft is provided. Holding the main spindle, moving the first comb tool post to position the rotary tool on the end face of the workpiece, and moving the second comb tool post to move the tool to the outer peripheral portion. While processing the outer peripheral portion with the tool of the second comb tooth post while rotating the workpiece by the rotation of the spindle, a position separated from the axis of the spindle by the rotation of the spindle. , The trajectory drawn by the machining position is circularly interpolated, and the first comb tool post is moved in the X direction and the Y direction based on the data of the circular interpolation. Drilling the end face by moving the workpiece relative to the tool of the first comb tooth turret in the Z direction while maintaining the position of the rotary tool. Processing method of workpiece by automatic lathe.