JPS61103701A - Automatic lathe with fixed spindle stock - Google Patents

Abstract

PURPOSE:To enhance the effectiveness in works by installing No.1 and No.2 tool rests with capability of traveling together in the axial direction and individually in the direction across the axis, giving the No.2 tool rest movability solely in the axial direction, and thereby providing possibility of simultaneous operation with two tools for different type of machining. CONSTITUTION:In this automatic lathe with fixed spindle stock, No.1 and No.2 tool rests 27, 30 can be fed together by sliding of a moving member 22 in the direction along the spindle, and also can be fed individually in the direction across the spindle axis, so that tools 14, 15 mounted on these tool rests 27, 30 are capable of carry out their respective machinings at the same time. Further, No.2 tool rest 30 is given original ability of axially moving with protrusion/retraction of a mounting shaft 32 to allow the tools 14, 15 to be slightly offset to carry out their respective different types of machining such as coarse and finish cutting, wherein the independent axial movement of No.2 tool rest can be minimized. This assures enhancement of effectiveness in works as well as accomplishment of the object with small and simple construction.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an arrangement configuration of a headstock and a tool rest of an automatic lathe, and in particular, it has a guide push and is held in two sets of tool rests. This invention relates to the arrangement of a blade feed stand of a numerically controlled automatic lathe that cuts bar materials using a cutting tool.

[Conventional technology and its problems]

Conventionally, automatic lathes having a guide pusher have been widely known, and numerically controlled automatic lathes equipped with two sets of tool rests have also been put into practical use.

FIG. 3(a) is a conceptual plan view showing a conventional technique. In the figure, a headstock 2 disposed on a main body 1 is capable of sliding in the axial direction on a guide rail 6.
The main shaft 4, which is rotatably supported by the main shaft 4, grips the bar 5 and rotates at a predetermined number of rotations.

The tip of the bar 5 passes through the guide pusher 26 and is inserted into the cutting tool 1.
It protrudes into the processing area of 4.15.

On the other hand, the two sets of turret tool rests 12.16 each hold a plurality of the cutting tools 14.15, and the base 10.
．． The cross feed table 9 is attached to a cross feed table 9 via a shaft 11, and the cross feed table 9 is guided by a 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 pusher 26 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 is guided. It overflows the rail O and moves forward at the predetermined feed speed (
In the diagram, move leftward).

On the other hand, in the turret tool post 12.13, a predetermined cutting tool 14 or 15. is selected and cut to a predetermined depth by moving the cross feed table 9, and cut into a predetermined shape by the axial feed of the headstock 2 and the lateral movement of the cross feed table 9.

In such an automatic lathe, two sets of tandoor tool rests 12.
16 cannot be cut at the same time, so it is impossible to perform rough cutting and finish cutting at the same time, or to perform outer diameter cutting 16 and groove machining 17 at the same time as shown in FIG. 3(b). There were 5 problems such as long processing time and poor workability.

The above explanation was carried out using a so-called headstock sliding type automatic lathe in which the headstock 2 overflows the spindle center line and moves forward and backward. The same is true for so-called fixed headstock automatic lathes, which have a slide that slides along the centerline of the main spindle.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its purpose is to enable the cutting tools of the first and second tool rests to simultaneously perform different cutting operations, and to eliminate waste in the axial movement of the second tool rest. An object of the present invention is to provide a fixed headstock type automatic lathe that can further improve workability.

[Structure of the invention]

In order to achieve the above object, the present invention includes a headstock fixed to a main body, a movable member movable on the main body along the spindle centerline, and a movable member fixed on the movable member concentrically with the spindle centerline. a first tool rest that is movable on the movable member in a direction perpendicular to the spindle center line; The second tool rest is movable.

[Embodiments of the invention]

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

FIG. 1 is a plan view of the automatic lathe in this embodiment, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1. In addition, the third
Components that are the same as those in FIG.

As shown in the figure, on the main body 1 there is a first
A guide rail 21 is provided, and a moving member 22 is in sliding contact with the first guide rail 21. Moving member 22
is converted into a linear motion by a ball screw (not shown) by the power from the servo motor 23, and slides on the first rule 21 along the center line of the spindle. On this moving member 22, a guide push 6 is fixedly provided at a position facing the main shaft 4, and a second guide rail 24 and a third guide rail 25 each extending in a direction perpendicular to the main shaft are provided. It is arranged.

The second guide rail 24 includes a first base 26 and this base 26.
a first turret 12 attached to the side wall of the first turret 12;
A tool rest 27 is in sliding contact with the first tool rest 27, and this first tool rest 27 is slid by power from a servo motor 28.

The first tool rest 27 is of a turret type, and cutting tools 14 such as various cutting tools are radially attached thereto.

The first tool rest 27 is configured such that the attached cutting tool 14 performs cutting work at a processing position near the guide pusher B.

The third guide rail 25 includes a second base 29 and this base 29.
a second turret 16 attached to the side wall of the second turret 16;
A tool rest 60 is in sliding contact with the second tool rest 60, and this second tool rest 60 is slid by power from a servo motor.

The second tool rest 60 is also of a turret type, and tools 15 such as a cutting tool are attached radially.

Further, the second tool rest 30 is connected to the mounting shaft 62 of the turret 16.
is movable in the axial direction by receiving power from the actuator 66 and moving in and out.

The fixed headstock type automatic lathe having the above-mentioned configuration has a movable member 22.
By sliding in the direction of the spindle axis, the first and second tool rests 27.60 can be fed at once, and the first tool rest 27 and the second tool rest 30 are each independently orthogonal to the main shaft. These tool rests 27.60
The cutting tools 14 and 15 attached to the cutting tools 14 and 15 can perform cutting operations at the same time, as shown in FIG. 3(b). Further, since the second tool rest 60 can independently move in the axial direction by moving the mounting shaft 62 in and out, the cutting tools 14 and 15 can be slightly offset to perform different cutting operations such as rough cutting and finishing cutting. I can do it.

It should be noted that the present invention is not limited to the one embodiment 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 post 60 can be achieved by sliding a second moving member on the third guide rail 25, disposing an axial guide rail on the moving member, and moving the second tool rest 60 on the third guide rail 25. The second tool rest 60 may be configured to slide.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the first and second tool rests can be collectively moved in the axial direction by moving the movable member in the main axis direction, and furthermore, the first and second tool rests can be moved in the axial direction.
Since each tool rest can independently move in the direction perpendicular to the axis, and the second tool rest can independently move in the axial direction, each tool rest can perform different cutting operations at the same time, further improving work efficiency. Furthermore, since the axial feed operation, which is a common operation for each turret, can be performed all at once, the amount of independent axial movement of the second turret can be minimized. This makes it possible to have a small and simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of an automatic lathe according to an embodiment of the present invention. 1... Main body, 2... Headstock, 4...
...Main shaft, 6...Guide push, 12...
...1st turret, 16...2nd turret,
22...Moving member, 27...First tool rest, 60...Second tool rest. Patent applicant Citizen Watch Co., Ltd. J Figure 3 (b)

Claims (1)

[Claims] A headstock fixed to the main body, a movable member movable on the main body along the spindle centerline, a guide push fixed on the movable member coaxially with the spindle centerline, and a guide push on the movable member. A first tool rest movable in a direction perpendicular to the spindle center line, and a second tool rest movable on the moving member independently of the first tool rest in the direction of the spindle center line and in a direction orthogonal to the spindle center line. This is an automatic lathe with a fixed headstock.