JPS61103703A - Automatic lathe - Google Patents

Abstract

PURPOSE:To enhance the effectiveness in works by providing No.2 tool rest with capability of independent movement both in the direction along spindle and the one across the same, allowing No.1 and No.2 tool rests to work at the same time, and by controlling both tool rests by a simple control program. CONSTITUTION:In this automatic lathe with fixed spindle stock, control is made with the same program as designed for a conventional NC auto-lathe while No.2 tool rest 31 lies at the point of origin for movement. When simultaneous processing is made with tools 14, 15 on these two tool rests 28, 31 in order to shorten the time of works, such operations as advancing No.2 tool rest 31 till the processing position in the direction across the spindle axis and offsetting the cutting points with the tools 14, 15 slightly from each other shall be added to the motion of No.1 tool rest 28. This allow managing the sliding amount of guide rail 29 and stroke of the fitting shaft 33 with a minor scale as well as making the system with small and simple construction. Further, the program for control can be provided only through addition of a program for movement of the tool rest 31, which does not require any complicated procedure for preparation.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an arrangement of a headstock and a turret of an automatic lathe, and in particular, it has a guide bush 2 and two sets of turrets. The present invention relates to the arrangement of a blade feed stand of a numerically controlled automatic lathe that cuts a bar with a held cutting tool.

"Prior art and its problems" Conventionally, there are three widely known automatic lathes with guide bushings, and a numerically controlled automatic lathe equipped with two sets of turrets has also been put into practical use.

FIG. 4 is a conceptual plan view showing the conventional technology. The main shaft 4, which is rotatably supported by the headstock 2, grips a bar 5 and rotates at a predetermined number of rotations. It protrudes into the processing area.

- 10,000, two sets of turret tool rests 12 and 13! Each of them holds a plurality of the cutting tools 14 and 15, and the base 1
0.11 to the transverse feed table 9, and the cross feed table 9 is guided by the guide rail 8 and slides in a direction perpendicular to the spindle center line.

During actual cutting, the bar 5 that passes through the guide punch 7 and protrudes into the machining area is gripped by the chuck of the spindle 4 and rotates at a predetermined number of rotations, and the headstock 2 that supports the spindle 4 rotates at a predetermined number of rotations. Move forward at a predetermined feed rate along guide rail B (
(leftward in the figure) -f'.

- In the turret tool rest 12 and 13, a predetermined cutting tool 14 or 15 is selected by the rotation of the turret, and is cut to a predetermined depth by the movement of the transverse feed table 9, and the axial feed of the headstock 2 and the lateral It is cut into a predetermined shape by moving the feed table 9 in the lateral direction.

In such an automatic lathe, two sets of turret tool rests 12 are used.
．． 16 cannot be cut at the same time, so rough cutting and finishing cutting can be performed at the same time, or external diameter cutting 16 and groove machining 17 cannot be performed at the same time as shown in Fig. 4 (BL). There were 5 problems such as long machining time and poor workability.

In the above explanation, the work was carried out on a so-called headstock sliding type automatic lathe in which the headstock 2 moves forward and backward along the spindle center line.
This is exactly the same in a so-called fixed headstock type automatic lathe in which the headstock 2 is fixed to the main body 1 and has a slide below the cross feed table 9 that slides along the centerline of the spindle.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its purpose is to provide a sliding member that slides two turret tool rests, that is, the first and second tool rests, in directions parallel and perpendicular to the spindle center line. This makes it possible to eliminate waste in the configuration and provide a slide for the second tool rest on this sliding member, further improving workability. An object of the present invention is to provide an automatic lathe that can control the operation of the table.

[Structure of the invention]

In order to achieve the above object, the present invention has a headstock that rotatably supports a spindle, and a cutting tool that holds a cutting tool and moves toward and away from the spindle relative to the centerline of the spindle, and is orthogonal to the centerline of the spindle. a first sliding member provided on the sliding member;
a second tool rest that is slidable independently of the first tool rest in the spindle centerline direction and orthogonal direction and that is provided on the sliding member; and the first tool rest that is disposed on the spindle centerline. and a guide bush whose relative position in the direction of the spindle centerline is fixed.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 (a plan view of the automatic lathe in the Chigi example), Figure 2 is a sectional view taken along the line A-A in Figure 1. - symbol is attached, and detailed explanation of that part is omitted.

As shown in (2), a headstock 2 is fixed on the main body 1, and a first guide rail 21 is arranged parallel to the main shaft 4 supported by the headstock 2 so as to rotate 5 times. A lower sliding member 22 is in sliding contact with this first rule 21. The lower sliding member 22 is converted into a linear motion by a ball screw (not shown) by the power from the servo motor 23, and the first
It slides on the guide rail 22 along the spindle centerline. A guide bushing 6 is fixedly provided on the lower sliding member 22 at a position facing the main shaft 4.
A second guide rail 24 is provided that extends in a direction perpendicular to .

An upper sliding member 26 is in sliding contact with the second guide rail 24 and is capable of sliding in a direction perpendicular to the spindle centerline using power from a servo motor 25 . A first tool rest 28 consisting of a first base 27 and a first turret 12 attached to the side wall of the first base 27 is fixedly provided on the upper sliding member 26. The first tool rest 28 is of a turret type, and the cutting tool 14 consisting of various bits, etc.
are installed radially on the turret.

The D/Ku first H table 28 is used to hold the attached cutting tool 14.
The cutting work is performed in a processing area near the guide bush 6.

Further, a third guide rail 29 is provided on the upper sliding member 26 and extends in a direction perpendicular to the spindle centerline. A second tool rest 31 consisting of a second base 60 and a second turret 16 attached to the side wall of the second base 60 is in sliding contact with this third rail 29. slides in a direction perpendicular to the main shaft 4 by power from the servo motor 32 . The second tool rest 61 is also of a turret type, and cutting tools 15 such as bits are attached radially. In addition, the main 1ii111
It is movable in the axial direction of 4.

The fixed headstock automatic lathe with the above-mentioned configuration has a second tool rest 6.
1 is at the origin of movement, either the NC automatic lathe shown as the prior art in FIG.
(except that it is caused by sliding) and can be controlled by the same program.

10,000, when simultaneously machining with the cutting tool 14.15 of the double-edged moving table 28.61 in order to shorten the working time, the second tool rest 61 is used for machining with the first tool rest 28, which is the same as in the prior art. This is carried out by adding an action of advancing perpendicularly to the center line of the spindle to the position where the cutting tool 14, 15 is located, and an action of slightly offsetting the cutting points of both cutting tools 14, 15.

Therefore, the amount of sliding of the third guide rail 29 for the second tool post 31 and the stroke of installation @66 are very small compared to the amount of movement of a normal tool post, and its structure is also compact. Moreover, a simple one is sufficient, and furthermore, the program for controlling it is sufficient to add a program for moving the second tool post 61 as described above, and there is almost no risk of tool interference, so it is relatively easy. can be created.

FIG. 3 shows another embodiment of the present invention, in which a mechanism for moving the headstock 2 and the turret 28.61 toward and away from each other by one distance is provided by sliding on the first guide rail 21. @
Instead of the structure of the lower sliding member 22, the headstock 2 is made to slide on the guide rail 6 along the spindle center line by the driving force of the servo motor 65, and the headstock sliding type automatic lathe is constructed. This embodiment is substantially the same as the embodiment shown in FIGS. 1 and 2 in other respects. Therefore, detailed description will be omitted.

It should be noted that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention. For example, the independent axial movement of the second tool rest 61 can be achieved by sliding a third sliding member on the third guide rail 29 and disposing a fourth guide rail in the main shaft direction on the sliding member. It is also possible to have a configuration in which the fourth sliding member slides on this guide rail.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the second tool rest can independently perform the movement operation in the spindle axis direction and the orthogonal direction, so the first and second tool rest can perform the cutting operation simultaneously. At the same time, since the common operations of these tool rests can be performed at once, it is possible to improve workability by -1.

Furthermore, the operation control program for the first tool post can be easily created in the same way as in the prior art, and the control program for the second tool post when moving independently can also be created by controlling the relative displacement between the first tool post and the first tool post. Since the control program can be easily created by adding a program for the control program, the control program can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a plan view taken along the plane '-7' of an automatic lathe according to an embodiment of the present invention, and FIG. 4 tb+ is an explanatory view showing an example of a processed product. 1... Main body, 2... Headstock, 4...
... Main shaft, 5 ... Bar material, 6 ... Kite bush, 22 ... Lower sliding member, 26 ...
... Upper sliding member, 28 ... First tool rest, 6
1... Second turret. Patent applicant Citizen Watch Co., Ltd. Figure 3

Claims (2)

[Claims] (1) a headstock that rotatably supports the spindle; a sliding member that holds a cutting tool, moves toward and away from the headstock along the spindle centerline, and slides perpendicular to the spindle centerline; a first tool rest provided on the sliding member; and a second tool rest provided on the sliding member and capable of sliding independently of the first tool rest in the direction of the spindle centerline and orthogonal directions. and a guide bush provided on the spindle center line with a fixed relative position to the first tool rest in the spindle center line direction. (2) The automatic lathe is a fixed headstock automatic lathe, and the
A tool rest and a second tool rest that is slidable independently of the first tool rest in the direction of the spindle centerline and in the orthogonal direction are both provided on the upper surface of the lower sliding member that slides in the direction of the spindle centerline. 2. The automatic lathe according to claim 1, further comprising a guide bush provided on an upper sliding member that slides in orthogonal directions, and a guide bush provided on the lower sliding member.