JP3316003B2 - Numerically controlled automatic lathe and machining method with numerically controlled automatic lathe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerically controlled automatic lathe having a headstock and an opposed headstock, and a numerically controlled automatic lathe.
In particular, without complicating the configuration and without significantly affecting the main processing,
Main processing and back processing can be performed simultaneously,
Thereby, the present invention relates to a device devised so that the processing time can be shortened and the productivity can be improved.

[0002]

2. Description of the Related Art A conventional numerically controlled automatic lathe is constructed, for example, as shown in FIG. First, a headstock 101 is provided, and a facing headstock 103 is disposed at a position facing the headstock 101. The headstock 101 is movable in the Z-axis direction.
Numeral 3 is movable in the XB axis direction and in the ZB axis direction orthogonal to the XB axis direction and parallel to the Z axis. The headstock 1
A rotary-type guide bush 105 is provided between the headstock 01 and the opposed headstock 103. In the figure, the work 107 is gripped by the headstock 101 and the guide bush 105, and the work 107 'cut off by parting is gripped by the facing headstock 103.

[0003] An X1-axis tool post 109 is provided, and the X1-axis tool post 109 is provided with an X1-axis tool post 109 parallel to the XB axis.
It is movable in the axial direction. X1 axis tool post 10
A turret 111 is rotatably attached to 9.
The turret 111 has tools 113 attached to a plurality of tool holders 112. X1-axis tool post 109
The X2-axis tool rest 115 is installed on the side facing the. The X2-axis tool rest 115 is an X2-axis tool rest 115 that is parallel to the X1-axis.
It is movable in the axial direction. X2 axis tool post 11
A turret 117 is rotatably attached to 5,
The turret 117 has tools 119 attached to a plurality of tool holders 118.

In the above-described configuration, the main processing performed by holding the work 107 on the headstock 101 and the guide bush 105 is performed while simultaneously or alternately operating the X1-axis tool post 109 and the X2-axis tool post 115. Work 10 cut off by parting off after main machining
7 'is gripped by the opposed headstock 103, and in this state, the work 107' is subjected to back processing. This kind of back processing is
This is performed using the X1-axis tool post 109 or the X2-axis tool post 115. However, the X1-axis tool post 109
Alternatively, when the back surface of the workpiece 107 'is processed using the X2-axis tool post 115, the X1-axis tool post 109 and the X
The two-axis tool rest 115 cannot be used for main machining. Therefore, as shown by a virtual line in the figure, X1
Separately from the shaft tool rest 109 and the X2-axis tool rest 115, three-axis tool holders 121 and 123 are provided as back processing tools. Back processing tools 125 and 127 are attached to these three-axis tool holders 121 and 123. The back machining is performed by using the three-axis tool holders 121 and 123, so that the main machining is performed using the X1-axis tool rest 109 and the X2-axis tool rest 115 which are not used. That is, the main machining can be performed using the X1-axis tool post 109 and the X2-axis tool post 115, and at the same time, the back machining can be performed using the 3-axis tool holders 121 and 123, thereby shortening the machining time. This improves the productivity.

Another type of numerically controlled automatic lathe is shown in FIG. This is Tokuhei 4-
No. 29482. First, a bed 201 is provided, and a headstock 203 is installed on the right side of the bed 201 in the figure so as to be movable in the Z1 axis direction. On the side facing the headstock 203, an opposing headstock 205 is installed so as to be movable in the Z3 axis direction. A first tool rest 207 is provided between the headstock 203 and the opposed headstock 205 and at a lower position in the figure. The first tool rest 207 is installed so as to be movable in the X1 axis direction orthogonal to the Z1 axis and the Z3 axis. Also, the first tool post 207
A turret 209 is rotatably mounted on the turret 209, and a plurality of tools 211 are mounted on the turret 209.

A second tool rest 213 is provided on the side opposite to the first tool rest 207. This second turret 21
Reference numeral 3 is movable in a Z2 axis direction parallel to the Z1 axis and the Z3 axis and in an X2 axis direction orthogonal thereto. Also, the second
A turret 215 is rotatably installed on the tool rest 213, and a plurality of tools 217 are mounted on the turret 215. A guide bush 219 is provided on the left side of the headstock 203 in the drawing.

In the above configuration, when the main work is performed by gripping a work (not shown) on the headstock 203 and the guide bush 219, the first tool rest 207 and the second tool rest 213 are operated simultaneously or alternately. Performed by After the main machining is completed, the work cut off by the parting-off machining is gripped by the facing headstock 205 side.
13 in the Z2 axis and X2 axis directions. At this time, if the main processing is to be performed at the same time, the processing is performed using only the first tool rest 207.

[0008]

According to the above-mentioned conventional configuration, there are the following problems. First, in the case of the numerically controlled automatic lathe shown in FIG. 4, at the same time as performing back processing on the work 107 ′ held by the opposed headstock 103, both the X1-axis tool post 109 and the X2-axis tool post 115 are used In order to perform main machining using the three-axis tool holders 121 and 12
3 is separately provided, and there is a problem that the configuration is complicated and the cost increases.
Further, in the case of the numerically controlled automatic lathe shown in FIG. 5, when the back work is performed on the workpiece held by the second tool rest 213 on the side of the opposed headstock 205 and the main machining is to be performed at the same time, the first tool Since the process is performed using only the table 207, a long time is required for processing, and there is a problem that productivity is low.

The present invention has been made on the basis of such a point, and an object of the present invention is to make the structure of the apparatus complicated and without largely affecting the main machining, to reduce the opposing headstock side. It is possible to simultaneously perform the back processing for the workpiece gripped on the main body and the main processing for the workpiece gripped on the headstock side.
A numerically controlled automatic lathe and a numerically controlled automatic lathe that can shorten the processing time required for processing and improve productivity
To provide a processing method .

[0010]

In order to achieve the above object, a numerically controlled automatic lathe according to the present invention comprises a headstock rotatably supporting a spindle and moving in a Z-axis direction which is a center line direction of the spindle, and An opposing headstock disposed on a side facing the headstock and moving in a ZB axis direction parallel to the Z axis direction and an XB axis direction orthogonal thereto, and the XB axis disposed between the headstock and the opposing headstock. A plurality of turrets moving in the X-axis direction parallel to the direction, the spindle head, the opposed spindle head, a numerical controller for controlling the turret alone or in any combination to perform any machining, In a numerically controlled automatic lathe comprising: a main machining tool for performing main machining on a work gripped on the headstock side on at least one of the tool rests; and Grasped Is attached to back machining tool carrying out the back <br/> surface processing into the ZB-axis direction with respect to over-click,
The numerical control device to follow the movement of the above due to the main processing said at least one of said opposed headstock of the XB-axis direction to move to the tool rest in the X-axis direction, to the main processing and the X-axis direction A synchronous control mechanism for simultaneously performing the back surface processing in the ZB axis direction orthogonal to the above is provided. Further, the machining method using the numerically controlled automatic lathe according to the present invention is arranged such that the spindle is rotatably supported, and the workpiece gripped on the spindle head side moving in the Z-axis direction which is the center line direction of the spindle is opposed to the headstock. A machining method using a numerically controlled automatic lathe, which simultaneously processes a workpiece gripped on an opposed headstock side that is disposed on the side and moves in a ZB axis direction parallel to the Z axis direction and an XB axis direction orthogonal to the ZB axis direction, Among a plurality of tool rests arranged between the head stock and the opposed head stock and moving in the X-axis direction parallel to the XB-axis direction, a main tool for a work gripped on the head stock side attached to at least one of the tool rests. For the main processing tool that performs the processing, and for the workpiece gripped on the opposite headstock side
The main processing tool is selected from among the rear processing tools for performing the rear processing in the ZB axis direction, and the main work tool is selected by the selected main processing tool. A main processing step of performing main processing, and, at the final stage of the main processing step, separating the work from the headstock side, and a step of gripping the other end of the work on the opposed headstock side; Performing an initial position alignment of the gripped workpiece and the back surface processing tool, and simultaneously moving the at least one tool post in the X axis direction with the main machining in the XB axis direction of the opposed headstock. By following the operation, the ZB axis orthogonal to the X axis direction on the workpiece gripped on the opposed headstock side by the back surface processing tool
And a back surface processing step of performing back surface processing in the direction .

[0011]

The headstock, the opposing headstock, the first turret, and the second turret are controlled by the numerical controller alone or in any combination, so that any machining can be performed. Further, the two-axis synchronous control mechanism provided in the numerical controller can simultaneously perform the back surface processing without lowering the efficiency of the main processing. For example, assuming that a back processing tool is attached to the first tool rest, the biaxial synchronization control mechanism causes the movement of the first tool rest in the X1 axis direction to follow the movement of the opposing headstock in the XB axis direction. As a result, at the same time as performing main machining with the first tool post,
The back processing is performed by the back processing tool attached there. At this time, the second tool post can be used for the main machining at the same time, and the machining time is greatly reduced as a whole. It should be noted that the tool for mounting the back surface may be attached to any tool post, or may be attached to both.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, there is a bed 1 and this bed 1
A headstock table 3 is installed on the upper side and on the left side in the figure, and a headstock 5 is movably installed on the headstock table 3. The headstock 5 rotatably supports the spindle, and is moved by a headstock drive 7 in the Z-axis direction, which is the centerline direction of the spindle. An opposed headstock table 9 is provided on the bed 1 on the side facing the headstock table 3. Another opposed headstock table 11 is provided on the opposed headstock table 9. The opposed headstock table 11 is moved by the opposed headstock drive unit 13 in the ZB-axis direction parallel to the Z-axis. An opposed headstock 15 is provided on the opposed headstock table 11. The opposing headstock 15 is moved by the opposing headstock driving unit 17 in the XB direction orthogonal to the ZB axis. That is, the opposed headstock 15 moves in the ZB axis direction and the XB axis direction.

A guide bush 19 is provided between the headstock 5 and the opposing headstock 15 and at a position closer to the headstock 5 side. Further, a first tool rest 21 is provided between the headstock 5 and the opposing headstock 15 and at a lower position in the figure. The first tool rest 21 is installed on a tool rest table 23, and is moved by a tool rest driving unit 25 in an X1 axis direction parallel to the XB axis. A turret 27 is rotatably mounted on the first tool rest 21. A plurality of tool holders 28
And a tool 29 are attached. In the figure, a cutting tool is shown as the tool 29. On the other hand, the first tool post 21
The second tool rest 31 is installed on the side facing the. The second tool rest 31 is set on a tool rest table 33, and is driven by a tool rest driving unit 35 so that the X-axis parallel to the X1 axis is controlled.
It moves in two axial directions. A turret 37 is rotatably mounted on the second tool post 31.
The turret 37 has a plurality of tool holders 38 and tools 3.
9 are attached. A cutting tool is also shown as the tool 39. A turret 37 of the second tool rest 31 is provided with a back surface machining tool 41. That is, unlike the case shown in FIG. 4 used in the description of the conventional example, a back machining tool stand is not provided separately from the tool rest, but is attached integrally. Of course, it is possible to attach and detach.

A numerical controller 40 is provided,
The numerical control device 40 realizes desired processing by controlling the above-described components individually or in any combination. For example, the opposed headstock 15 can be controlled to the XB axis and the ZB axis, and the first tool post 2 can be controlled.
The operation of the first tool post 31 on the X2 axis and the operation of the second tool rest 31 on the X2 axis can be operated separately or in association with each other. In addition, the numerical controller 40 has a two-axis synchronous control mechanism 42. This two-axis synchronous control mechanism 42
Is X2 of the second tool post 31 according to a certain command code.
The operation on the axis and the operation on the XB axis of the opposed headstock 15 are synchronously controlled.
The movement of the opposed headstock 15 on the XB axis follows the movement on the two axes.

The operation of the above configuration will be described with reference to FIG. The processing example shown in FIG.
While moving in the two-axis direction and moving the headstock 5 side in the Z-axis direction, the main processing is performed on the work 43 held by the headstock 5 and the guide bush 19, and at the same time, the workpiece 43 is attached to the second tool post 31. Back processing tool 4
1, the back surface processing (the drilling process in this case) of the workpiece 45 (the workpiece cut off by the parting-off process and gripped by the facing head stock 15) 45 held by the facing head stock 15 is performed.
Is applied.

Hereinafter, the procedure will be described in detail. First,
The X2 axis or the XB axis is instructed, and the axis of the back machining tool 41 and the axis of the opposing headstock 15 are matched as indicated by the imaginary line in FIG. Next, the mode is switched to a predetermined command code to set a mode in which the operation of the XB axis follows the operation of the X2 axis under the control of the two-axis synchronization control mechanism 42. In other words, the operation of the XB axis is made to follow the operation of the X2 axis, so that the back processing tool 41 and the axis of the opposed headstock 15 are always aligned. Next, by giving a command to the X2 axis, the tool 43 of the second tool rest 31
The main work is performed on the workpiece 45, and a command is given to the ZB axis, so that the back work is performed on the work 45 by the back work tool 41. If such synchronous control is not necessary, the predetermined command code may be canceled. In addition, in the above-described synchronous control, not only the second tool post 31 but also the first tool post 21 side can participate in the main processing, whereby the main processing becomes extremely efficient.

According to the present embodiment, the following effects can be obtained. First, the main processing and the back processing can be performed simultaneously without complicating the configuration of the apparatus and without prolonging the processing time of the main processing. This is because the rear tool 41 is attached to the second tool post 31 on the side of the second tool post 31 for performing the main machining.
This is because the operation in the X2 axis direction and the operation in the XB axis direction of the opposed headstock 15 are simultaneously controlled by the two-axis synchronization control mechanism 42. Therefore, while the main machining is performed by the second tool post 31 side, the back machining can be performed by the back machining tool 41, and the main machining is performed not only by the second tool post 31 but also by the first tool post. 21 can also participate, so that the processing time can be shortened as a whole and the productivity can be improved.

The present invention is not limited to the above embodiment. First, in the above-mentioned embodiment, among the turrets for performing the main machining, the back processing tool 41 is attached to the turret 37 of the second turret 31. However, as shown in FIG. You may make it attach to the turret 27. Further, it may be attached to both the first tool post 21 and the second tool post 31. In this case, the moving range of the opposed headstock 15 in the XB-axis direction is expanded, and an optimal side is appropriately used. As the back machining tool 41, which does not include the one that includes a rotating drive unit and is it is thought. Further, the configurations of the first tool rest 21 and the second tool rest 31 are not limited to the one embodiment. That is, in the embodiment, the turrets 27 and 37 are used.
Are rotatably mounted and the tools 29 and 39 are selected by rotating the turrets 27 and 37, but the present invention is not limited to this. The same applies to the case where the tool is selected by sliding the.
Further, the positional relationship between the first tool post 21 and the second tool post 31 is not limited to the illustrated one, and the moving direction of each component is that it can be moved at least in the illustrated direction. The same applies to a type that can move in a direction.

[0019]

As described above in detail, according to the numerically controlled automatic lathe according to the present invention and the machining method using the numerically controlled automatic lathe, a back surface machining tool is mounted on at least one of the first and second turrets. A numerical control device includes a two-axis synchronous control mechanism that synchronously controls movement of the first tool post in the X1 axis direction or movement of the second tool post in the X2 axis direction and movement of the opposed headstock in the XB axis direction. With the provision, the main processing and the back processing can be performed simultaneously without affecting the main processing side at all and without complicating the configuration of the apparatus. Therefore, the operation time can be greatly reduced as a whole, and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention and is a view showing a configuration of an automatic lathe.

FIG. 2 is a diagram showing an embodiment of the present invention and is a diagram for explaining the operation.

FIG. 3 is a view showing another embodiment of the present invention, and is a view showing a configuration of an automatic lathe.

FIG. 4 is a view showing a conventional example and showing a configuration of an automatic lathe.

FIG. 5 is a view showing a conventional example, and is a view showing a configuration of an automatic lathe.

[Explanation of symbols]

 5 Headstock 15 Opposed headstock 19 Guide bush 21 First turret 31 Second turret 40 Numerical control device 41 Back machining tool 42 Two-axis synchronous control mechanism

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23B 1/00-25/06 B23P 23/02

Claims (2)

(57) [Claims] 1. A headstock that rotatably supports a spindle and moves in a Z-axis direction that is a center line direction of the spindle, and a ZB-axis direction that is disposed on a side facing the spindle head and is parallel to the Z-axis direction. An opposed headstock that moves in the XB axis direction orthogonal to the headstock; a plurality of tool rests that are arranged between the headstock and the opposed headstock and move in the X axis direction that is parallel to the XB axis direction; A numerical control device that controls the opposed headstock and the tool post alone or in any combination to perform any machining; anda numerically controlled automatic lathe comprising: The tool post has a main processing tool for performing main processing on the work held on the headstock side, and a back processing tool for performing back processing in the ZB axis direction on the work held on the opposed headstock side. Take Kicking with, to follow the movement of the said XB axis direction of the opposite headstock to move to said at least one of said tool rest in the X-axis direction due to the main processing in the numerical control device, the main processing and the X Axially
A numerically controlled automatic lathe comprising a synchronous control mechanism for simultaneously performing back processing in the ZB axis direction intersecting . 2. A work gripped on a headstock side, which rotatably supports a spindle and moves in a Z-axis direction which is a center line direction of the spindle, and a work which is disposed on a side opposed to the spindle head, and A machining method using a numerically controlled automatic lathe for simultaneously machining a workpiece gripped on an opposed headstock that moves in a parallel ZB axis direction and an XB axis direction orthogonal to the ZB axis direction. A plurality of tool rests arranged in the X-axis direction parallel to the XB-axis direction, and a main machining tool for performing main machining on a workpiece held on the headstock side attached to at least one tool rest; And the work held on the opposite headstock side.
The main processing tool is selected from among the rear processing tools for performing the rear processing in the ZB axis direction, and the above-mentioned work for the work whose one end is gripped on the headstock side by the selected main processing tool is performed. A main processing step of performing main processing, and a step of cutting off the work from the headstock side at the final stage of the main processing step, and holding the other end of the work on the opposed headstock side, A step of performing initial alignment between the gripped work and the back surface processing tool; and simultaneously moving the at least one tool post in the X axis direction with the main processing in the XB axis direction of the opposed headstock. by following the operation, said to the work gripped by the opposed headstock side by the back machining tool
A back processing step of performing back processing in the ZB-axis direction orthogonal to the X-axis direction, and a machining method using a numerically controlled automatic lathe.