JPH04112744U - machine tool rotary table - Google Patents

Abstract

(57) [Summary] [Purpose] N for machining workpieces with machine tools
This aims to reduce the number of man-hours required for C programming and to reduce the number of man-hours required for setting up workpieces on the work table. [Structure] An indexing table 7 on a machine table 6 of a machine tool is provided with a housing 8 having work tables 11, 11 on both ends and a work spindle 9 serving as a through-axis. A means 12 for identifying the machining surface of the workpiece relative to the tool spindle 9 is provided between the tool spindle 9 and the output table 7, as well as driving means for controlling the work spindle 9 by NC control and means for controlling the rotational direction of the work spindle 9 to be reversed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a rotary table for an NC machine tool.

0002

[Conventional technology]

In conventional rotary tables for NC machine tools, there is a A work table is provided, a work is attached to it, and a tool is attached to the tool spindle. It is configured to be processed by

0003

[Problem that the idea aims to solve]

By the way, in a device in which one work table is installed on one work spindle, the work I am trying to install multiple rotary tables and install two. Then, it is necessary to install two work spindles at the top and bottom, which makes the configuration complicated. won.

0004 In addition, in order to avoid complicating the configuration due to this vertical multiplexing, the work spindle If you try to perform machining with work tables installed at both ends, the The rotation direction of the workpiece is reversed, and two types of machining are performed on the front and back sides of the rotary table. Because it requires a machining program, double-sided through-shaft rotary tables have not been put into practical use. not present.

[0005]

[Means to solve the problem]

Machining is performed using a double-sided through-axis rotary table with an NC machine tool. In some cases, the rotation direction of the work spindle is different between the front and back sides of the rotary table. The operator had to consider two types of machining programs; The control device of the cutting center can only reverse the rotational direction of the work spindle when machining the back side. For example, the operator only has to think about the surface machining program, so The idea is to solve the conventional drawbacks by having the following configuration. It is. A housing that is installed and fixed on the machine table of a machine tool, a work spindle rotatably supported by the housing and provided as a through shaft; A work table that fixes the workpieces attached to each end of the work spindle. , a driving means for driving the rotation of the work spindle by NC control; Machining on the tool spindle of each work table attached to both ends of the work spindle surface identification means; The rotational direction of the work spindle is controlled to be reversed based on the identification result of the work surface identification means. rotation direction control means, A rotary table for machine tools equipped with.

[0006]

[Effect]

A workpiece is attached to each end of the work spindle installed in the housing of the rotary table. Install the machine table so that each work table faces the tool spindle. It can be rotated 180 degrees and fixed. In addition, the rotation of the work spindle Since it is configured to be driven by NC control, the tool attached to the tool spindle can be used on one side. After machining the workpiece attached to the worktable, turn the machine table 180°. You can immediately process a workpiece mounted on the other worktable by moving the Ru.

[0007] When the machine table is rotated 180 degrees, the direction of rotation of the work spindle is In this case, the rotation direction of the work spindle is reversed by the rotation direction control means. can be mounted on both worktables with one machining program. It is possible to process each workpiece. Note that the forward/reverse control of the work spindle is controlled by the rotor. This is done by providing a machined surface identification means for the tool spindle of the retable.

[0008]

【Example】

The drawings show an embodiment of the invention, and Figure 1 shows the rotary table of the invention. 2 is a partial top view of FIG. 1, and FIG. 3 is a side view of the machine tool equipped with the A sectional view of the table, FIG. 4 is an explanatory diagram of the structure of the rotary table of the present invention, FIGS. 5 and 6. are flowcharts each showing a work process.

[0009] As shown in Fig. 1, a column 2 of a machine tool 1 includes a spindle head 4 to which a tool 3 is attached, and a A machine table 6 is provided on the head 5, and on this machine table 6, On the other hand, an indexing table 7 is attached which is rotatable in a horizontal plane.

0010 In FIGS. 3 and 4, the workman is attached to the housing 8 mounted on the indexing table 7. Although an embodiment is shown in which two shafts 9 are provided, one above the other, in FIG. This shows the case where this is installed. The work spindle 9 is provided passing through the housing 8, and A work table 11 for attaching a work 10 is fixed at each end of the There is.

[0011] Additionally, between the machine table 6 and index table 7, there is a device for detecting the mutual rotational position. When the device is provided as a machined surface identification means 12 and the indexing table 7 is rotated, , so that it is possible to identify which side of the workpiece 10 is facing the tool 3. . The attachment of the workpiece 10 to the worktable 11 provided at both ends of the work spindle 9 is shown in Figure 2. The indexing table 7 is rotatably fixed at such a position. In addition, the control of machine tool 1 Control is performed by an NC control device 13.

0012 Next, the configuration of the rotary table fixed on the index table 7 will be explained in Fig. In this case, an embodiment in which two work spindles 9 are provided in the housing 8 will be explained. are shown, so one of them will be explained. In the figure, a work spindle 9 is rotatably supported in the housing 8 by a bearing 14. Work tables 11, 11 are fixed to both ends of the work spindle 9. In addition, the work spindle A worm wheel 15 is fixed to 9, and a vertical shaft worm (not shown) meshes with the worm wheel 15. The main shaft 9 is driven by the main shaft 9.

[0013] In addition, a flange portion 16 is formed on the outer periphery of the work spindle 9, and a flange portion 16 is formed in the flange portion 16. An annular recess 17 is formed in the ring, and an L-shaped cross section ring and an inverted L-shaped ring are combined here. , a cylinder part formed in the middle is fitted, and pressure oil is supplied to the cylinder part. By doing so, the ring of the flange portion 16 is inserted through the friction plate 18 fixed to the housing 8. A bush against the work spindle 9 is pressed against both walls of the shaped recess 17 to fix both. A rake device 19 is provided. Note that the other one also has the same structure.

[0014] A diagram illustrating a schematic configuration of a rotary table fixed on an indexing table 7. 4, the housing 8 has two work spindles 9 arranged vertically in parallel and , is provided as a horizontal penetrating shaft, and a worktable is attached to each end of the shaft. Bulls 11a, 11b, 11c, and 11d are installed. In the same figure, the housing The left side of ring 8 is the front side of the machined surface (flag = 1), and the right side is the back side of the machined side (flag = 0). Also, work table 11a is set to work coordinate system 1, work table 11c is set to work coordinate system 1, and work table 11c is set to work coordinate system 1. Coordinate system 2, work table 11b is the work coordinate system 3, work table 11d is the work Assuming the coordinate system 4, the processing steps are as shown in FIG. In this case, the flag representing the machined surface is detected by the machine table 6 and the index table. This is done by the machined surface identification means 12 between the workpiece Machining control is executed. The work process of the machine tool as a whole is shown in Figure 6. It is done in a sea urchin. Note that the rotation direction control means is controlled by the operator who commands the NC control device 13. Software for reversing the positive and negative signs representing the rotational direction of the shaft 9 is built into the NC control device 13. The process is as shown in the flowchart of FIG.

[0015]

[Effect of the idea]

According to the present invention, a through-shaft type work spindle with work tables 11, 11 provided at both ends A rotary table equipped with a rotary table 9 is installed on the machine table 6 of the machine tool, and Identifies which side of the work tables 11, 11 installed at both ends of the main shaft is being machined. A means is provided to reverse the direction of rotation of the work spindle 9 based on the identification result. Therefore, the workpiece machining on the left and right work tables can be switched, that is, so-called surface machining and back surface machining. When machining, you only need to consider the rotation direction of the work spindle, and the rest of the machining is done automatically. Since this is done automatically, there is no need to change the machining program, and the machine operator can The number of man-hours required for programming data can be reduced by half.

[0016] In addition, the work spindle is a through-axis, and work tables are provided at both ends, so Two workpieces can be attached to the work spindle in one setup, reducing setup man-hours. This can be reduced. In addition, if two work spindles are provided as shown in Figures 3 and 4, Furthermore, although it is compact, it is possible to set up many workpieces at once.

[Brief explanation of drawings]

FIG. 1 is a side view of a machine tool according to the present invention.

FIG. 2 is a partial top view of FIG. 1;

FIG. 3 is a sectional view of a rotary table according to the present invention.

FIG. 4 is an explanatory diagram of the configuration of a rotary table according to the present invention.

FIG. 5 is a flowchart showing processing steps.

FIG. 6 is a flowchart showing a work process.

[Explanation of symbols]

1 Machine tools 2 columns 3 Tools 4 Spindle head 5 bed 6 Machine table 7 Index table 8 Housing 9 Work spindle 10 work 11 work table 12 Machined surface identification means 13 NC control device 15 Worm wheel 16 Flange part 19 Brake device

Claims (1)

[Scope of utility model registration request] 1. A housing that is mounted and fixed on a machine table of a machine tool, a work spindle rotatably supported by the housing and provided as a through shaft, and a workpiece that is attached to each end of the work spindle. a work table, a driving means for driving the rotation of the work spindle by NC control, a machined surface identification means for the tool spindle of each work table attached to both ends of the work spindle, and a machined surface identification means for determining the rotational direction of the work spindle. A rotary table for a machine tool, comprising: rotation direction control means for performing reversal control based on identification results.