JPS5834242B2 - Machine Tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called work rotation type machine tool that rotates the work to machine the end face, outer diameter, and center of the work.

Generally, when machining the end face, outer diameter, and center of a workpiece, a slider device for machining the end face and outer diameter of the workpiece, and a tailstock for center machining are required, and the slider device cannot be used in the axial direction of the workpiece. The tailstock slides in the direction perpendicular to the workpiece, and the tailstock slides in the axial direction of the workpiece, so in order to prevent interference between the two, consider the space that the tailstock occupies while machining the workpiece on the slider device. The disadvantage is that the workpiece must be set back by the above space in the axial direction of the workpiece, resulting in a longer cutting feed.
There was a problem with accuracy and reliability.

Therefore, in view of the above-mentioned drawbacks of conventional machine tools of this type, the present invention aims to improve them and provide a compact and highly accurate machine that can machine the end face, outer diameter, and center of a workpiece with one set of sliders. It is something.

The structure of the present invention will be explained below according to the embodiments shown in the drawings.

In Figures 1 to 3, 1 is the main slider, 2
is a cross slider installed on this main slider 1.

The main slider 1 is placed on a base 3 via a lower slide 4 so as to be slidable in a direction orthogonal to the axial direction of the workpiece 5.

6 is a cylinder for sliding the lower slide 4 of the main slider 1, and is constructed as shown in FIG.

This cylinder 6 has a piston 7 for intermediate positioning and a piston 8 for feeding the lower slide 4, and chambers a, b and C9d are configured for the pistons 7 and 8, respectively.

When hydraulic pressure is supplied to the chamber a, the pistons 7 and 8 together project to the left in the figure, and at a position where the stopper 9 screwed to the rear end of the piston 7 abuts the fixed member 10, the piston 7 and 8 movement is restricted.

When hydraulic pressure is supplied to the chamber C from this state, only the feed piston 8 of the lower slide 4 protrudes, making it possible to cut the end face and outer diameter of the workpiece 5, which will be described later.

By the way, the hydraulic area of the piston 7 is set larger than that of the piston 8, and the piston 7 supplies oil pressure to the chamber d, and even if the piston 8 moves back and comes into contact with it, it maintains the above-mentioned stop position. and is unrelated to the movement of the piston 8.

The stopping position of the piston 7 can be arbitrarily set by changing the axial position of the stopper 9, and is used to position the cross slider 2 during center machining, which will be described later.

Cross slider 2 is similar to main slider 1 as described above.
It is installed above so as to be slidable in the axial direction of the workpiece 5, that is, in the direction orthogonal to the sliding direction of the main slider 1, and sliding is performed between the lower slide 4 and the upper slide 11.

12 is a cylinder for sliding the upper slide 11, and a piston 13 is connected to a stopper bolt 14 which is screwed onto the upper slide 11.

The stopper bolt 14 protrudes into the space 15 of the upper slide 11, and is fixed approximately in the center of the lower slide 4 with a stopper bolt 16 opposing the stopper bolt 14 and also protruding into the space 15. The position of the upper slide 11 (determination of the sliding amount) is performed by the stopper 17 that protrudes from the upper slide 11.

This sliding amount can be arbitrarily set by adjusting the stopper bolts 14 and 16.

A tool head stand 18 is installed on the upper surface of the upper slide 11, and a tool head 19 is further installed on top of the tool head stand 18.

The upper slide 11 and the tool head stand 18 are slidably connected by a dowel mechanism 20 along the axial direction of the workpiece 5, and the upper slide 11 is connected via a stopper bolt 14.
A threaded portion 23 that is screwed into the tool head stand 18 by rotating the scaled handle 22 of the end plate 21 connected to the
However, this tool head stand 18 is moved slightly forward or backward relative to the upper slide 11.

On the other hand, the tool head stand 18 and the tool head 19 form a T-groove fitting 24, and by adjusting the positioning bolt 25, they can be freely slid in a direction perpendicular to the axial direction of the work 5.

As shown in detail in FIG. 5, the tool head 19 has tool holders 28 and 29 that are removably attached to two side surfaces via dowel mechanisms 26 and 27, and the tool holder 28 has a dowel mechanism 30. Work through 5
A cutting tool 31 for cutting the end face and outer diameter of the workpiece 5 is attached to the other tool holder 29, and a center drill 32 for cutting the center of the workpiece 5 and a cutting tool 31 for cutting the end face and outer diameter of the workpiece 5 are attached and can be slid in a direction perpendicular to the axial direction of the workpiece 5. This center drill 3
A pivoting means 33 for pivoting 2 is attached.

34 is a scaled handle for minutely adjusting the cutting tool 31 via the dowel mechanism 30.

Sole head 19 of bite 31 and center drill 32
After positioning, these are fixed to the tool holders 28 and 29, respectively, using clamps (not shown) or the like.

Moreover, the tool holders 28 and 29 have stoppers 35 and 33 for center height adjustment between them and the vine head 19, so that the height of the cutting tool 31 and center drill 32 relative to the workpiece 5 can be adjusted.

Next, regarding the turning means 33 of the center drill 32, the fifth
This will be explained with reference to FIGS. 7 to 7.

In the figure, reference numeral 37 denotes a pivot shaft rotatably supported by a bearing in a tool holder 29 for center machining, and has a pivot plate 39 having a stopper 38 fitted and fixed at its tip. It is fixed to this rotating plate 39.

Reference numeral 40 indicates a gear disposed in the middle of the pivot shaft 37, 41 a rack attached to the tip of the piston 43 of the pivot cylinder 42, and 44 an idle gear disposed between the rack 41 and the gear 40 of the pivot shaft 37. , 46 is a limit switch mechanism.

The limit switch mechanism 45 protrudes through a long window 47 formed on one side of the gear box 46, as shown in FIG. 7, and detects the forward end and reverse end of the pin member 48 that operates together with the rack 41. It is composed of limit switches LS1 and LS2.

By detecting the forward end and backward end of the pin member 48, LS and LS2 are used to detect when the center drill 32 is machining the center of the workpiece 5 and when the cutting tool 31 is machining the end face and outer diameter of the workpiece 5. Know when it is inside,
The limit switch that controls the feed amount of the cross slide 2 in each case during surface machining is switched.

Next, the operation mode of the machine tool configured as above will be explained.

Machining of the workpiece 5 starts with cutting the end face or outer diameter.

The following explanation will be based on the case where the end face is cut.

First, hydraulic pressure is supplied to chambers a and c of the cylinder 6 to cause the pistons 7 and 8 to protrude.

The intermediate positioning piston 7 stops at the position where the stopper 9 abuts the fixed member 10, but the feeding piston 8 of the main slider 1 moves away from the piston 7 and further protrudes.

As a result, cutting feed in a direction perpendicular to the axial direction of the workpiece 5 is given to the main slider 1 and the cross slider 2 installed on the main slider 1, and the tool holder 2 attached to one side of the tool head 19
The end surface 5a of the workpiece 5 is cut by the cutting tool 31 of No.8.

During this end face cutting process, the turning cylinder 42
The piston 43 of L protrudes and maintains this state.
Sl is turned on by a pin member 48 of the rack 41 connected to the piston 43 (position indicated by a chain line in FIG. 7).

Therefore, the above operation of the rack 41 causes the idle gear 44 to
is rotated in the clockwise direction in FIG.
In order to prevent interference with the cutting tool 31, it is rotated and held at the position indicated by the chain line in FIG.

When end face cutting of the workpiece 5 is completed, the chamber C of the cylinder 6 is opened to drain, and hydraulic pressure is supplied to the chamber d.

The feed piston 8 is moved back to a position where it abuts the intermediate positioning piston 7 and is stopped there, thereby achieving intermediate positioning.

Therefore, the slider 1 will stop at a position that is retreated by a predetermined amount from the most forward cutting position.

After that, the main slider 1 is held in this side position, and the center drill 32 is turned to the position shown by the solid line in FIGS. 5 and 6.

Swinging is performed by supplying hydraulic pressure to one chamber of the swinging cylinder 42 and moving the piston 43 upward in FIG. 5.

The movement of the piston 43 is transmitted to the idle gear 44 from the rack 41 which operates together with the piston 43, and the stopper 38 moves the pivot shaft 37 clockwise in FIG. Rotate it until it makes contact with the

In this case, LS2 is turned on by the pin member 48 as the rack 41 moves, and it can be detected that the rotation has been completed.

Once it is confirmed that the center drill 32 has completed its rotation,
The sliding cylinder 12 of the cross slider 2 is operated to slide it in the axial direction of the workpiece 5, and the center drill 32 attached to one side of the sole head 19 makes a cut.

The center drill 32 performs center processing on the workpiece 5 until the tip of the stopper bolt 14 attached to the upper slide 11 comes into contact with the stopper 17 fixed to the lower slide 4 and the upper slide 11 stops sliding.

When the center machining is completed in this manner, hydraulic pressure is supplied to the other chambers of the slide cylinder 12, and the cross slider 2 is moved backward.

Retraction is completed when the stopper bolt 16 of the upper slide 11 comes into contact with the stopper 17 (see FIG. 2).

Also, hydraulic pressure is supplied to the other chamber of the turning cylinder 42, and the piston 43 and rack 41 are moved downward in FIG.
The idle gear 41 is rotated clockwise in FIG. 6, and the gear 40 and the rotation shaft 37 are rotated counterclockwise to return the center drill 32 to the state shown by the chain line.

The above is one cycle for machining the end face and center of the workpiece 5.

From the next cycle, only the feed piston 8 of the main slider 1 is operated while the intermediate positioning piston 7 is stopped at the intermediate position, and the end face cutting of the workpiece 5 is repeated.

Center processing may be performed in the manner described above.

In addition, if you need to perform rough machining or other cutting using another machine before cutting with this machine tool, you can perform it by retracting the main slider 1 to the rear end (starting position) every cycle. good.

The above explanation is based on the case where the cutting tool 31 cuts the end face of the workpiece 5, but it is also possible to cut the outer diameter, and in this case, the main slider 1 cuts the end face of the workpiece 5 perpendicularly to the axial direction. In addition to the feed in the axial direction, the cross slider 2 may feed the workpiece 5 in the axial direction.

In short, the present invention provides a machine tool that rotates the workpiece to machine the edge, outer diameter, and center of the workpiece, and a cross slider is installed on the main slider that is slidable in the front and rear directions perpendicular to the axial direction of the workpiece. Axial direction of workpiece (
A single tool head is installed on this cross slider, and a tool holder for attaching a cutting tool for end face/outer diameter cutting is installed on this tool head so that it can be adjusted by small amounts in the vertical and longitudinal directions. Furthermore, a tool holder for attaching a center drill is provided on the above-mentioned vine head so as to be able to be finely adjusted vertically and horizontally, and the center drill is provided on the latter tool holder so that it can be retracted from the workpiece via a turning means. When performing diameter cutting, the center drill only needs to be retracted from the workpiece, and the workpiece autoloading device can be installed above the space omitted from the tailstock, eliminating the need for a tailstock like in the past, making the work easier. Excellent in sex.

In addition, a cutting tool for cutting the end face and outer diameter of the workpiece and a center drill for center machining are removably disposed on the same tool head, so the drive device can be shared and the tool is compact.

Furthermore, since each tool holder can be slightly adjusted to approach and separate from the workpiece in the vertical direction and within the water surface, workpiece setting is easy and setup time can be shortened.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing the overall arrangement of the machine tool of the present invention;
Figure 2 is a sectional view taken along line A-A in Figure 1, Figure 3 is B in Figure 2.
-B sectional view, Figure 4 is a vertical sectional view showing the feed cylinder of the main slider, Figure 5 is a partial sectional view showing the tool head and turning means, Figure 6 is the line C-C in Figure 5. The arrow view and FIG. 7 are sectional views taken along the line D-D in FIG. 5. 5...Work, 1...Main slider, 2...Cross slider, 19...
・Tool head, 31...Bite, 28...
...Tool holder 132 for end face and outer diameter cutting...
... Center drill, 29 ... ° ... Tool holder for center machining, 33 ... Rotating means.

Claims (1)

[Claims] 1. In a machine tool that rotates a workpiece to machine the edge, outer diameter, and center of the workpiece, a cross slider is installed on the main slider that can freely slide in the front and rear directions perpendicular to the axial direction of the workpiece. A single tool head is installed on this cross slider, and a tool holder for attaching a cutting tool for end face/outer diameter cutting is installed on this tool head so that it can be adjusted by small amounts in the vertical and longitudinal directions. A feature of the present invention is that a tool holder for attaching a center drill is provided on the tool head so as to be able to be slightly adjusted vertically and horizontally, and the center drill is provided on the latter tool holder so that it can be retracted from the workpiece via a turning means. machine tools.