JPS5823559Y2 - Turning tool correction device - Google Patents

Description

[Detailed description of the invention] This invention relates to a so-called cutting tool correction device for rotating the workpiece, which rotates the workpiece and slides the cutting tool for turning.By combining with an appropriate correction command device, it is possible to finely adjust the cutting edge in micron units. We provide a cutting tool correction device for turning that automatically and accurately performs high-precision finishing, and also releases the cutting edge after each cutting to prevent tool marks from forming on the turning surface in order to obtain a long cutting tool life. It is something to do.

The embodiments shown in the drawings will be described in detail below.

The tool rest 2 is slidably fitted into the main body 1 using a dovetail groove, etc.
Piston rod 4 of hydraulic cylinder 3 attached to main body 1
The turret 2 is inserted into the tool rest 2 and screwed together to connect it as one unit. When the A port of the hydraulic cylinder 3 is refueled, the turret 2 moves forward due to the thrust of the hydraulic cylinder, and when the B port is refueled, the turret 2 moves forward. 2 retreats.

An engaging protrusion 6 is fixed approximately at the center of the end surface (on the left side in FIG. 1) of the tool rest 2 that faces a slide block 11, which will be described later.

M is a pulse motor attached to the main body 1, and the shaft 9 of the pulse motor is connected by a lead screw 8 rotatably supported on the main body 1 by bearings 7, 7, and a shaft joint 10 such as a universal joint. ing.

Reference numeral 11 denotes a slide block screwed onto the lead screw 8, and a predetermined sloped surface 11a is formed on the side surface (right side in FIG. 1) of the slide block.

Therefore, as the lead screw 8 rotates, the slide block 11
is the sliding surface 1a of the main body 1.

1b and moves up and down in FIG.

A pin 12 implanted on the lower surface of the slide block 11 passes through an oval hole 13 made in the bottom plate 1c of the main body 1 and projects below the bottom plate 1c of the main body 1.

A two-pronged fork attached to a rod 14 that is slidably supported on the main body 1 pinches the pin 12 installed in the slide block 11, so the slide block 11
Following the movement, the rod 14 also moves in the vertical direction in FIG.

A dog 16 is attached to the tip of the rod 14 (lower end in FIG. 1), and limit switches LSI and LS2 that engage with the dog 16 are provided on the main body 1.

These limit switches LSI and LS2 detect the vertical movement limit of the slide block 11 and prevent the slide block 11 from moving further, so that even if the slide block 11 hits the bearing 7, the pulse motor M still rotates. This is to prevent the pulse motor M from being overloaded as a result.

Reference numeral 17 denotes an upper cover of the slide block 11 attached to the main body 1, and its lower surface 17a and the sliding surfaces 1a and 1b of the above-mentioned main body 1 form a sliding groove for the slide block 11.

A turning tool correction device having such a configuration is used by being attached to, for example, a precision boring machine or a carriage of a lathe.

Now, a case will be described in which a boring work is carried out by fixing a drilling rib to the tool rest 2 as shown by the imaginary line in FIG.

When oil is supplied from the A port, the turret 2 moves forward due to the thrust of the hydraulic cylinder 3, and the engagement protrusion 6 of the turret 2 presses against the sloped surface 11a of the slide block 11, causing the slide block 11 to slide on the main body 1. The knife is positioned by being pressed against the surface, 1a.

Next, the carriage is advanced by the cutting feed of the boring machine to perform boring work on the workpiece.

When cutting is finished, oil is supplied to the B port, the tool post 2 is moved back, and the cutting edge is removed from the turning surface of the workpiece.

After that, the carriage is moved back and returned to its original state.

Change the workpiece and repeat the cutting cycle.

When the cutting edge becomes worn and correction of the cutting tool becomes necessary, a necessary pulse signal is sent to the pulse motor M to rotate the lead screw 8 and move the slide block downward by a predetermined amount.

Then, the sloped surface 11a of the slide block 11 that the engaging protrusion 6 of the tool rest 2 comes into contact with is displaced, so that the desired correction can be performed accurately.

For example, when the slope of the slide block 11 is new, the pitch of the lead screw 8 is 2%, and the pulse motor M is designed to rotate once in 200 pulses, that is, rotate 1.8 degrees in one pulse, suppose that When the pulse signal is sent, the pulse motor M rotates 90 degrees, and the slide block 11 rotates 0.
If the blade moves by 5 mm, the cutting edge will move by 0.5 x earth = 00 0.0025 mm, that is, by 2.5 microns, and the cutting tool will be corrected by 5 microns in diameter.

When such cutting tool correction is repeated and the dog 16 hits the limit switch LS2, the pulse motor M will not rotate even if a pulse signal is sent, thereby preventing the pulse motor M from being overloaded.

At this time, the pulse motor M is reversed, the slide block 11 is returned upward, and the attachment of the cutting tool is adjusted.

The amount by which the slide block is returned upward is limited by a limit switch LS1.

As described above, this device uses pulse signals to perform precise tool correction, and when used in combination with a correction command device that generates a predetermined pulse signal based on the measurement results of an air micro, etc., the tool correction can be performed automatically. It also becomes possible.

During cutting, the thrust of the hydraulic cylinder keeps the slide block in close contact with the sliding surface of the main body, resulting in stable machining accuracy.

When correcting the cutting tool, the thrust of the hydraulic cylinder does not act on the slide block, so it can be carried out smoothly and accurately using a small-capacity pulse motor, and is practical for mass production of high-precision finishing.

Furthermore, since the cutting tool is IJ-IJ-fed for each cutting, a beautiful surface is obtained without leaving tool marks on the cut surface, and the life of the cutting tool is extended.

Moreover, even though a pulse motor is used for high-precision positioning, the movement limit of the slide block is detected by the engagement of a dog and a limit switch, and no further movement is prevented. - has the advantage of not being overloaded.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a sectional view taken along the line 1--2 in FIG. 1, and FIG. 3 is a 1-[1 sectional view taken in FIG. 1. 1...--Main body, 2...Turret, 3...
...Hydraulic cylinder, 6...Engaging protrusion, 8.
... Lead screw, 11 ... Slide block, 11a ... Slope of slide block.

Claims (1)

[Scope of utility model registration request] A slide block that connects a lead screw rotatably supported by the main body to the shaft of the pulse motor, is slidably fitted to the lead screw in a sliding groove of the main body, and has a predetermined slope on the side surface. and connect the rod to this slide block,
A dog is attached to this rod, and a limit switch that engages with the dog and detects the limit of movement of the slide block is disposed on the main body. The fitted tool post is connected to the piston rod of a hydraulic cylinder attached to the main body, and an engaging protrusion is fixed to the end face of the tool post facing the slide block, and during cutting, the tool post is advanced by the thrust of the hydraulic cylinder. This tool correction device for turning is configured to position the engaging protrusion by pressing it against the sloped surface of the slide block, and to move the tool rest back when cutting is completed.