JP2870099B2 - Automatic cutting tool loosening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a device for automatically tightening or loosening when a cutting tool is attached to a chuck integrated with an arbor.

(Prior Art) A cutting tool A shown in FIG. 1 is inserted into a central hole of a chuck of an arbor B, tightened, and used after being attached to various machine tools.

In the conventional preparation process of the cutting tool, the cutting tool A is fastened to the chuck of the arbor B, and the work of loosening is performed by a worker manually tightening or loosening the chuck using a tool such as a wrench on a dedicated table. Is going.

(Problems to be solved by the invention) However, since the work of attaching or tightening the arbor of the cutting tool to the chuck or the work of tightening is performed manually by a human,
If the amount of work is large, there are problems such as fatigue, poor safety, and poor work efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device capable of automatically tightening or loosening a blade tool to an arbor chuck without manually performing the work of tightening or loosening the tool.

[Configuration of the invention]

(Means for solving the problem) The technical measures taken to solve the problem are as follows.

A spindle unit having a spindle, a bearing for holding the spindle, and a forward / reverse rotation device for rotating the spindle forward / reverse: a slide table which advances / retreats with respect to an arbor mounted on the spindle; A chuck fixing portion having a pair of pins provided and driven by a cylinder; and projecting the pins when the slide table makes a predetermined stroke and the groove of the arbor is positioned between the pair of pins. A control means for fitting the groove into the groove and rotating the spindle forward or backward by the forward / reverse rotation device after the fitting to tighten or loosen the blade with respect to the arbor; , Automatic cutting tool loosening device.

(Operation) To tighten the blade to the arbor chuck, insert the shank of the arbor into which the blade has been inserted into the spindle, and then actuate the air cylinder to advance the claw that fits into the groove of the chuck, and move forward and backward. As the rotating device gradually rotates, the cutting tool is securely fastened to the chuck integrated with the arbor.

To loosen the blade, insert the shank of the arbor with the blade into the spindle, fit the claw of the cylinder into the groove of the chuck, and reverse the forward / reverse rotation device to loosen the blade. , Which can be removed, and all the tightening and loosening operations are performed automatically.

Example An example will be described below.

FIG. 2 is a cutting tool automatic tightening and loosening device according to the present embodiment, which comprises a spindle section C and a chuck fixing section D. FIG. 2 is a side view, and FIG. 3 is a plan view.

1 is a main body, 4 is a bead provided horizontally at the center of the main body, 2 is an air cylinder provided on the upper part of the bead, and moves the slide table 6 left and right along the L and M guides 5.

3a and 3b are air cylinders provided on both sides of the tip of the slide table 6, and pawls 9a and 9b are provided at the tip of the air cylinder.
There is.

Reference numeral 7 denotes a spindle for mounting the arbor B, and reference numeral 8 denotes a forward / reverse rotation device connected to the spindle 7, whereby the spindle 7 can rotate right or left.

In the above configuration, when the arbor B with the cutting tool A is set on the spindle 7 and the apparatus is started, the air cylinder 2 is operated, and when the slide table 6 is advanced to a predetermined position, the pawls are operated by the air cylinders 3a and 3b. 9a and 9b come out and are fixed to the grooves of the arbor, and the spindle is rotated by the forward / reverse rotating device 8 to perform a tightening or loosening operation. Reference numerals 10a and 10b denote safety devices which are area sensors, which operate while the device is operating, and which stop all devices when the device is interrupted.

FIG. 4 is an enlarged view of an arbor having a blade attached to the apparatus, 11a and 11b are auto switches provided below the air cylinder 2, 12 is a bearing case, 13 is a bearing, and 14 is an arbor chuck portion. , 15 is an arbor shank, 16 is a chuck groove, and the air cylinders 3a, 3
The structure is such that the nails 9a and 9b at the tip of b fit into it, 17 is a key,
18 is a flange.

The operation of the slide table 6 will be described with reference to the above configuration. The slide table 6 slides forward by the air cylinder 2, and the position of the tip is adjusted by the stopper bolt 6a and the stopper 6b. When the auto switch 11a provided on the air cylinder 2 is turned on, the spindle 7 held by the bearing case 12 and the bearing 13 is moved by the flange 18 to the bearing case 12.
First, it is rotated at a low speed by the forward / reverse rotation device 8 attached to the motor.

After a few seconds, the pawls 9a, 9b are pushed out by the air cylinders 3a, 3b at a constant pressure, so that the claws 9a, 9b come into contact with the arbor chuck portion 15, and fit into the chuck groove 16, whereby the arbor chuck portion 14 is fixed.

When the claws 9a, 9b fit into the check grooves 16, the air cylinders 3a, 3b
Is turned on, the forward / reverse rotation device 8 is switched to high-speed rotation, and the shaking portion 15 of the arbor, which is stopped by the key 17, is rotated to perform tightening and loosening.

(1) Tightening The forward / reverse rotation device rotates forward, and when the tightening torque reaches a predetermined value, a torque detector (not shown) attached to the forward / reverse rotation device operates to stop rotation.

(2) When loosening The forward / reverse rotation device reversely rotates with an appropriate torque and stops after the time is up.

When the above operation is completed, the claws 9a and 9b return and the slide table 6 returns to the original position, and the one-cycle operation is completed.

In this way, the operator simply sets the arbor B on the spindle 7 and presses the start button.
This can be performed by automatic control according to.

(Effects of the Invention) The present invention has the following effects.

Conventionally, all of the manual operations performed by workers are NC
The operation can be controlled by the apparatus, and the work efficiency is greatly improved while the work safety is improved.

[Brief description of the drawings]

1 is an external view of a cutting tool and an arbor used in various machine tools, FIG. 2 is a side view of the present embodiment, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a main part of the present embodiment. It is the whole explanatory drawing which has the expanded partial sectional view. A: blade, B: arbor, C: spindle, D
... Check fixing part, 2,3a, 3b ... Cylinder, 6 ... Slide table, 7 ... Spindle, 8 ... Forward / reverse rotation device, 9a, 9b ... Claw, 13 ... Bearing, 14 ... Chuck , 16 …… Chuck grooves.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23Q 3/12

Claims (1)

(57) [Claims] 1. A spindle unit having a spindle, a bearing for holding the spindle, and a forward / reverse rotation device for rotating the spindle forward / reverse: a slide table that moves forward and backward with respect to an arbor mounted on the spindle, and a slide table for the slide table. A chuck fixing portion having a pair of pins provided opposite to each other and driven by a cylinder; and the chuck table is provided when the slide table makes a predetermined stroke and the groove of the arbor is located between the pair of pins. A control in which a pin is protruded and fitted in the groove, and after this fitting, the forward / reverse rotation device is used to rotate the spindle forward or backward to tighten or loosen the blade with respect to the arbor. Means: Automatic cutting tool loosening device equipped with: