JPS63245302A - Numerically controlled automatic lathe - Google Patents

Abstract

PURPOSE:To simply improve machining efficiency and accuracy by providing a horizontally movable tool post with one or more drill setting posts arranged in the same direction and at the same level as a main spindle center line, plural tool holders arranged perpendicular to the center line and at the same level, and a guide bush for a long material. CONSTITUTION:A lathe has the horizontal main spindle which can move forward and backward and horizontally, a bush holder 2 fixed in front of the tip of the main spindle and a horizontally movable tool post 3 provided in front of the bush holder 2, and the tool post 3 can move horizontally and at a right angle to the main spindle. A collet chuck provided at the tip of the main spindle grasps work material with its longitudinal axis coinciding with a main spindle center line, and the tip of the slender work material is set so as to pass through the hole of the guide bush 2 and protrude further forward, resulting in machining made at the mouth of the guide bush 2. The slender work material can be therefore supported by the guide bush 2 and machined near its supported point to have excellent machining accuracy. A single tool holder 9 is provided at both the ends of the tool post 3 respectively, and a drill setting post 10 or a double tool holder 9' is demountably set between the tool holders 9. Thus the machining can be freely performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a comb-tooth type numerically controlled automatic lathe with a guide bushing that has a simple mechanism and exhibits excellent machining efficiency and high precision.

B. Conventional technology In recent years, lathes have made remarkable progress, and while automation has progressed and the mechanisms have become more complex, problems remain in machining efficiency and accuracy, and the current situation is unsatisfactory.

For example, machining is performed by applying a blade fixed to a tool post to the cutting point of a material that is gripped horizontally on the spindle and rotating, and using a tool post that moves horizontally in the direction of the material's spindle and horizontally at right angles to this. In this case, especially when machining long and slender materials, the diameter dimensional accuracy of the part away from the collet chuck is not good.

C Problems to be Solved by the Invention As mentioned above, when processing a long and narrow product while being gripped by a collet chuck, the diameter dimensional accuracy deteriorates as the distance from the collet chuck increases.

In addition, as mentioned above, there are many lathes on the market that are automated and convenient, but are inefficient and do not have good machining accuracy.Therefore, there is a desire for a lathe with a simple mechanism and excellent machining efficiency and precision. Ru.

dMeans for Solving the Problems The inventor of the present invention obtained the following invention as a result of studies in view of the above problems.

The present invention has a main shaft that is mounted horizontally and can move back and forth in the direction of its central axis and rotate, and that grips a processed material at its tip, and a through hole that is concentric and co-directional with the center line of the main shaft. It consists of a guide bushing base and a horizontal movable turret that can move in the horizontal direction at right angles to the spindle centerline. For drill installation with one or more drill bits attached, a stand and a tool holder with multiple bits attached are installed, so that each cutter can be aligned independently with the spindle center line, and each bit is horizontal and aligned with the spindle center line. This is a numerically controlled automatic lathe in which the cutting edge of each cutting tool is at right angles to the center line of the spindle.

eExample 1 Next, the present invention will be explained with reference to the drawings. In FIG. 1 showing a front view of an embodiment of the present invention, a spindle 1 that grips a workpiece so that its longitudinal direction and the center line of the spindle coincide with each other, a headstock 4
It is fixed in a horizontal position and is rotated by a belt 6 that transmits the drive of a main shaft motor 5, and can be moved forward and backward in the direction of the main shaft center line by a motor 7. A guide bushing base 2 is fixed in front of the main shaft 1, and its through hole is made concentrically and in the same direction as the main shaft centerline. Furthermore, a horizontal movable tool rest 3 is located in front of the bushing rest 2, and is moved horizontally at right angles to the main shaft 1 by a sliding mechanism 8.

In FIG. 2 showing the plan view of FIG. 1, the horizontal movable turret 3
There are three tool holder stands 9 and 9' and one stand 10 for mounting the cutter. The cutting edge of the cutting tool 22 fixed to each tool holder base is at the same level and perpendicular to the center line of the spindle 1,
Further, each cut 21 is located in the same direction and at the same level as the center line of the main shaft 1. Each bit and each drill are used individually, but when used, the horizontal movable tool rest is moved to align the cutting tool or the drill with the point to be processed on the workpiece gripped by the spindle. The horizontal movable tool post is moved by a motor 16.

In FIG. 4 showing the spindle mechanism, the headstock 4 slides back and forth in the spindle direction with respect to the lathe body 13 by the action of the ball screw 11 and nut 12 driven by the motor 7.

The main shaft 1 rotates via the belt 6 and the boot U14.

The collet chuck 15 at the tip of the main shaft 1 can strongly grip the workpiece by aligning its longitudinal direction with the direction of the center line of the main shaft 1 by the action of a chuck opening/closing lever.

In FIG. 5, which shows a cross section of the left side of FIG.
, a horizontal movement perpendicular to the main shaft 1 is performed by the action of the nut 18. In Fig. 5, each of the tool holders 9 at both ends has one
One cutting tool 22 is provided, and another cutting tool holder 9' in the middle thereof is provided with two cutting tools. Further, for mounting the aperture, the stand 10 is provided with three aperture holders 10'. In FIGS. 2 and 5, the aperture holder 10' is fixed to the stand 10 for attaching the aperture.
A drill 21 can be attached to the tip of the headstock side. The drill bit is parallel to and at the same level as the center line of the spindle.

The horizontal movement of the horizontal movable tool post aligns each drill bit with the center line of the main spindle, and the main spindle is moved forward to align the tip of the material with the tip of the cutter, and the main spindle is rotated to perform drilling.

Each cutting tool 22 fixed to the cutting tool holders 9 and 9' is in a horizontal position and perpendicular to the spindle center line, and each cutting edge is at the same level as the spindle center line.

f Example 2 In Example 1 of the present invention, the configuration of the stand is
The functions shown in the figure can be used. That is, when installing the aperture, the aperture holder 10' is slidably penetrating the base 10, and the slidable range is determined by the collar and nut fixed to each aperture holder, so that the aperture holder 10' does not come off. Furthermore, a coil spring 23 for winding the aperture holder 10' is provided. In addition to the table, a hydraulic or pneumatic cylinder 24 is fixed to the lathe body so that the axis of its piston rod is aligned with the center line of the main spindle. When one of the drill holders aligned with the center line of the main shaft is pushed out by the piston rod tip 25, the coil spring is compressed and drilling is performed with the tip protruding to a specific position. When the hydraulic or pneumatic cylinder is then returned to its original position, the spring pressure of the coil spring immediately restores the light position.

8 Functions The lathe of the present invention has a horizontal main shaft that can move horizontally back and forth, a bushing head is fixed in front of the tip of the main shaft, and a horizontal movable tool rest is provided in front of the main shaft to perform horizontal movement in a direction perpendicular to the main shaft. Can be done. The collet chuck at the tip of the main spindle grips the workpiece with its long axis aligned with the center axis of the main spindle. The tip of the elongated material to be processed passes through the hole in the guide bushing and extends further forward. Therefore, processing will be done at the mouth of the guide bushing.
The long and thin material is supported by the guide bushing and the processing is performed close to the support point, resulting in good processing accuracy.

Cutting tool holders 9 each having one cutting tool are provided at both ends of the tool rest, and machining can be carried out freely by attaching and removing a stand or a double tool holder 9' between them.

h Effects of the Invention The structure of the present invention has the effect that the mechanism becomes a surface element and that machining efficiency is improved. In addition, the overall effect of installing a guide bushing is to create a numerically controlled lathe with high machining accuracy.

[Brief explanation of drawings]

Fig. 1 is a front view of the embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a left side view of Fig. 1, Fig. 4 is an explanatory diagram of the mechanism of the main shaft, and Fig. 5 is a plan view of Fig. 1. 1 is a left side partial cross-sectional view, and FIG. 6 is an explanatory diagram of the mounting plate of the second embodiment. 1... Main spindle, 2... Guide bush stand, 3... Horizontal movable turret, 4... Headstock, 5... Morada for main spindle, 6... Belt, 7... Motor , 8...Sliding mechanism, 9,9'...Bite holder, 10...Drill mounting stand, 10'...Drill holder, 11...Ball screw,
12... Nut, 13... Lathe body, 14... Pulley, 15... Collet chuck, 16... Motor, 17... Ball screw, 18... Nut, 21...
・Cut, 22...Bite, 23...Coil spring, 2
4...Hydraulic or pneumatic cylinder, 25...Pi fang 2
Figure/6a-ri''7p1 figure

Claims (1)

[Claims] A main shaft that is mounted horizontally and can move back and forth in the direction of its central axis and rotate, and that grips a processed material at its tip, and a guide bushing base that has a through hole that is concentric and in the same direction as the center line of the main shaft. , consisting of a horizontal movable turret that can move in the horizontal direction at right angles to the spindle centerline, and the horizontal movable turret includes one or more movable turrets in the same direction and at the same level as the spindle centerline. A drill mount to which a cutter is attached and a tool holder to which multiple bits are attached are provided so that each cutter can be individually aligned with the spindle center line, and each cutter is horizontal and perpendicular to the spindle center line, and each A numerically controlled automatic lathe characterized by the cutting edge of the cutting tool being at the same level as the spindle center line.