JPH03228505A - Nc lathe - Google Patents

Abstract

PURPOSE:To mount a large number of tools by indexing one of child turrets carrying several tools and incorporated to a parent turret to one of machining positions which are arranged concentrically about the turning center of the parent turret, so as to eliminate the interference between tools. CONSTITUTION:A parent turret 16 is turned so as to index and position a child turret carrying thereon predetermined tools to a machining position, and then the child turret 17 is turned so as to index and position a specified tool T2 to the machining position. Then a motor 8 is driven to control a saddle 10 along the Z-axis while controlling an intermediate bed 11 along the X-axis, and to control a turret tool bed 12 along the X-axis in order to cut a workpiece. Thereafter, the saddle 10 is controlled along the Z-axis so as to feed the workpiece in order to form a diametrical part of the same. In order to exchange the tool T2 with a tool T1, the turret tool bed 12 is moved backward, and then the parent turret 16 is turned by an angle of 180deg. so as to index and position the same, thereby setting the bore tool T1 at the machining position.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an NC lathe with improved workability.

BACKGROUND OF THE INVENTION A conventional turret tool rest in an NC lathe was equipped with only one turret.

Problems to be Solved by the Invention For this reason, when tools are attached to the turret, some tools may interfere with adjacent tools, which limits the number of tools that can be attached, making it impossible to use a large number of tools.

Therefore, there was a problem that the process had to be divided due to tool interference and insufficient number of tools, resulting in a decrease in machining efficiency.

The present invention was made in view of the above-mentioned problems of the conventional technology, and its purpose is to provide an NC lathe that can mount a large number of tools and avoid tool interference with adjacent tools. It is something.

Means for Solving the Problems The present invention, which achieves the above-mentioned objects, is one in which a single master turret is provided with a plurality of child turrets to which a large number of tools are mounted, and each child turret controls the rotation of the parent talent. They are arranged concentrically around the center and can be indexed to the machining location, and the tools of the child turret can be indexed to the machining position.

The inner diameter tool and the outer diameter tool are installed separately or in a mixed manner so as not to interfere with the operator turret, the parent turret is indexed, the child turret is positioned at the machining area, and the child turret is rotated to the specified position. Machining is performed by indexing and positioning the tool to the machining position.

Example Embodiments will be described below based on FIGS. 1 to 4.

In a well-known NC lathe, there is a headstock 2 on the left side above the head l.
is fixedly installed, and the main shaft with a chuck 3 fitted on the tip is rotatably supported by a bearing, and the rotation of the motor 4 is controlled by a pulley 5.
It is rotated by a belt attached to the A tailstock 7 having a center 6 is mounted and fixed on the right side of the head 1 so as to be adjustable in position in the Z-axis direction. In addition, a saddle 10 whose movement is controlled by a feeder 9 rotated by a motor 8 in the Z-axis direction on a horizontal guide surface on the head l is moved, and on the saddle 10 there is a guide surface in the X-axis direction. A middle platform 11 whose movement is controlled by a feeder 13 driven by a motor (not shown) is mounted. A beam 1/gutter turret 12 is placed on the middle stand 11, and a viewing lens 16 whose rotation axis is in the Z-axis direction is rotated and indexed by a known mechanism. And this parent sauce
/ In Figure 3, there are a plurality of child shafts 16, that is, two child shafts 1-1718 whose rotation axes are in the Z-axis direction at positions 180@ apart on the same circumference centered on the rotation center of the parent shaft 12. It is mounted on a shaft. In Figure 4, there are three child turrets 19. 20. 21 are supported with their rotation axes extending in the Z-axis direction at 120° intervals on the same circumference centered on the rotation center of the parent turret 12.

Each child sag 7) has a plurality of tool mounting positions, and the inner diameter tool T1. The outer diameter tools T2 are mounted on the turret separately or together so that they do not interfere with each other. Furthermore, the child turret may be provided with at least one rotary tool shaft supported and driven by a known mechanism.

To cut a workpiece gripped by the chuck 3 and supported by the center 6 of the tailstock 7, the parent turret 16 is rotated and the child turret 17 equipped with a predetermined tool is moved to the lower position of the machining area in this example. Determine the position. Next, the child turret 17 is rotated to index and position a predetermined tool T2 at a processing position. The motor 8 is driven by an NC command, the saddle 10 is controlled on the Z axis, and the intermediate platform 11 is controlled on the X axis to position the workpiece at the machining start position. Next, the turret turret 1 was set by the NC command.
2 is controlled on the X axis to give a depth of cut, and the saddle 10 is also controlled on the Z axis.
The axis is controlled and the machining feed is performed to cut the outer diameter of the workpiece. To replace the machining tool from T2 to TI, evacuate the turret tool post 12 and move the parent turret 16 to 180.
``Turn index positioning'' The child turret 18 is turned and indexed to bring the inner tool TI to the machining position.

Effects Since the structure is as described above, the present invention has the following effects.

Since the tool mounting position can be set arbitrarily and the machining turret can also be arbitrarily selected, it is possible to eliminate tool interference and the shortage of tools.

Moreover, there is no need to separate the processes and they can be consolidated, improving processing efficiency.

[Brief explanation of drawings]

FIG. 1 is an explanatory front view of the NC lathe of the present invention, FIG. 2 is an enlarged explanatory view of the turret part, and FIGS. 3 and 4 are front views of the turret.

Claims (2)

[Claims] (1) An NC lathe characterized by having a plurality of child turrets on which a large number of tools are attached to a parent turret of one tool post. (2) A plurality of child turrets are arranged so that their centers are on concentric circles centered on the rotation center of the parent turret, and each can be indexed to a machining location, and the tool of the indexed turret can be further indexed to a machining position. The NC lathe according to claim 1.