JPS59227307A - Automatic fitting device for drill positioning ring - Google Patents

Abstract

PURPOSE:To enable fitting with high accuracy even there is a dimensional error providing a mechanism, through which a ring fitting operation for a drill can be fully automatically carried out, in an automatic fitting device for drill positioning ring for installing drill to a chuck, etc. CONSTITUTION:When a drill 1 and a ring 2 are introduced from the feeding chute side into a holding groove 14, a holding drum 12 is turned a certain angle and send the drill 1 and the ring 2 to a position shown by a symbol (a), and the drum 12 is stopped at the position. At this point of time, a plunger 22 is advanced to start the operation of fitting the drill 1 in the ring 2. This fitting action is completed when the tip of the drill 1 pushes a stop lever 23, and the plunger 22 retreats while the stop lever 23 is adsorbed by an electric magnet 32, allowing the lever 23 to be held in a condition separated from the tip part of the drill 1 against a spring 26. Then, the drum 12 is turned a certain angle and sends out the drill 1 and ring 2 to the discharging chute 16 side. And, by continuously repeating this operation, a full automatization of fitting operation can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic inserting device for a drill positioning ring used for correctly attaching a drill to a predetermined position in a chuck or the like.

A drill used in a multi-spindle drilling machine is used by being attached to a chuck. When attaching the drill, as shown in FIG. Join and tighten the chuck at this joining position to fix it.

In this case, the dimensional accuracy of the length t from the tip (cutting edge) of the drill 1 is an essential requirement for use of the drill, and if there is variation in this length t, a difference will occur in the drilling depth. For example, the work of inserting a ring into a carbide drill used for printed circuit boards, etc. is done manually.The conventional method will be explained with reference to Fig. 2. to support ring 2 in an immovable state,
Next, after inserting the drill 1 into the ring 2 from the tip side, the manual lever 4 is operated to move the press rod 5 forward, and the tip of the press rod 5 presses the drill 1, causing the drill 1 to protrude from the ring 2. The protruding length is read by a dial gauge 6 to confirm the insertion position of the ring 2.

However, in the above conventional method, the drill 1 is inserted into the ring 2 based on the length from the tip of the drill 1 to the front surface 2a of the ring 2, which is not on the side of the chuck, that is, the length L shown in FIG. Therefore, if there is a dimensional difference in the thickness of the ring 2, in order to obtain the length t mentioned above, the thickness of the ring 2 must be taken into account and the pressure rod 5 must be operated while reading the dial gauge 6. Moreover, it is time-consuming because it is done manually one by one, and the work efficiency is extremely poor and high-precision positioning cannot be expected.

Therefore, the present invention has developed an automatic insertion device that completely automates the work of inserting a ring into a drill and that can always insert the ring in the correct positional relationship with high precision even if there are dimensional variations in the thickness of the ring. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be described in detail with reference to the embodiments that are contemplated to be provided and illustrated in the accompanying drawings.

The holding drum 12 is rotatably mounted on the machine base 11,
13 is its drive shaft. A plurality of holding grooves 14 for accommodating and holding one drill 1 and one ring 2 are provided at equal intervals along the axial direction on the circumferential surface of the holding drum 12, and these holding grooves 14 are not shown in the figure. In the case of , 8 are provided,
Parts near each end thereof are particularly recessed portions 1 for accommodating the ring 2.
4a.

Further, a supply sheet 15 for the drill 1 and the ring 2 is placed on one side of the holding drum 12, and a discharge sheet 16 for taking out the combined body of the drill 1 and the ring 2 is placed on the other side of the holding drum 12. The guide pieces 17 and 18 are protruding from the respective recesses, especially on the side of the discharge seam 6 for sending out the combined body toward the side of the discharge seam 6, and one of the guide pieces 1
7 protrudes into a circumferential relief groove 19 provided on the holding drum 12.

Next, a mechanism for inserting the drills 1 and the rings 2, which are supplied one by one into the holding grooves 14 on the holding drum 12, will be explained.

The insertion mechanism consists of an operating cylinder 21 equipped with a pressing plunger 22 of the drill 1 and a positioning mechanism that regulates the joint position of the drill 1 and the ring 2.
is capable of protruding freely toward the holding groove 14 located at the uppermost position, and presses the drill 1 housed in the holding groove 14 from the rear end side, and inserts the drill 1 into the ring 2 housed in the recess L4a. It has been shown to function as a working department. On the other hand, the positioning mechanism includes a stop lever 23 and a positioning arm 24 for the ring 2, which are arranged on the side of one end surface of the holding drum 12, facing the plunger 22.
3, the lower end portion is pivotally attached to the center portion of the positioning arm 24 2
5, the upper end 23a of which protrudes above the positioning arm 24, and this straddle lever 23 is placed under the action of a spring 26 provided between it and the positioning arm 24. On the other hand, the positioning arm 24 is made up of two leaf springs 2.
The positioning arm 24 is supported on the machine base 11 by 7, and the distal end side of the positioning arm 24 extends above the holding drum 12. and the positioning arm 24
The tip of a first adjusting screw attached to the upright portion 11a of the machine base 11 can freely come into contact with the rear end 24b, and between this first adjusting screw 28 and the rear end 24b there is a screw, which will be described later. A switch is constructed, and 29 is an electrical contact fixed to the rear end portion 24b. Further, a second adjustment screw 31 and an electromagnet 32 are arranged on the positioning arm 24 with the upper end 23a of the stop lever 23 mentioned above positioned in the middle, and the second adjustment screw 31 is a support portion fixed on the positioning arm 24. 33
It is screwed so that it can move forward and backward freely, and its tip is connected to the stop lever 2.
A switch, which will be described later, is constructed between these two members, and 34 is an electrical contact fixed to the upper end 23a.

In the figure, 35 is a backing plate made of ζ Teflon that is glued to the approximate center of the stop lever 23, and 36 is a relief hole made in the positioning arm 24.

Next, the operation of the apparatus of the present invention according to the second embodiment will be explained.

As shown in FIG. 5, when the drill 1 and the ring 2 are introduced one by one into the holding groove 14 from the supply chute 15 side (the ring 2 is accommodated in the recess 14a), the holding drum 12 is rotated at a predetermined angle. The drill 1 and the ring 2 are rotated (by 45 degrees in the illustrated case) to send the drill 1 and the ring 2 to the insertion operation position (uppermost position) indicated by the symbol a in FIG. 5, and the holding rat 12 is temporarily stopped at that position. At this point in time, the plunger 22 moves forward and the work of inserting the drill 1 into the ring 2 begins. This insertion operation ends when the tip of the drill 1 presses the stop lever 23, and at the same time the pusher 22 retreats, the stop lever 23 is attracted to the electromagnet 32 by the operation of the electromagnet 32, and the stop lever 23 is moved by the spring 26.
It is held in a state separated from the tip of the drill 1 against the force. Next, the holding drum 12 is rotated by a predetermined angle, and the combined body of the drill ring 2 is delivered to the discharge sea 1/16 side. By continuing this operation, it is possible to fully automate the work of inserting the ring 2 into the required position of the drill l. When the ring 2 is accommodated in the recess 4a of the holding groove 14 and sent to the above-mentioned insertion operation position a, the ring 2 presses the pressed portion 24a provided at the tip of the positioning arm 24. However, the positioning arm 24 moves slightly to the right in FIG. 3.

This movement also moves the stop lever 23, so even if the thickness of the ring 2 varies, the length t shown in FIG. Can be inserted.

The first adjustment screw 28 described above is a member that adjusts in advance the position 1t at which the pressed portion 24a of the positioning arm 24 comes into contact with the ring 2 and is pressed, and is used as a so-called gap adjustment screw.On the other hand, the second adjustment screw 3 ] is used as the insertion position of the ring 2, that is, the side where the length of t is set.
By adjusting both screws 28 and 3], it is possible to set the insertion position of the ring with respect to the drill 1, and to insert the ring 2 into the drill 1 in the correct positional relationship regardless of variations in warp thickness. Become. Further, the first adjustment screw 28 and the second adjustment screw 31 are in contact with the respective electric contacts 29 and 34 at the time of starting the operation of this device, and the first adjustment screw 28 is in contact with the respective electric contacts 29 and 34 when the ring 2 presses the positioning arm 24. When the tip of the drill 1 presses the stop lever 23, the second adjustment screw 31 separates from the electrical contact 34 and turns off. The operating cylinder 21 is operated in reverse by the signal of
The electromagnet 32 is configured so that the electromagnet 32 can be operated at the same time as the electromagnet 2 is moved backward. That is, the second operation control and the operation control for intermittently rotating the holding drum 12 can be synchronized by using a so-called sequence control method.

The present invention is as described above, and the thickness of the ring varies based on the distance (length t) from the tip of the drill (cutting edge) to the back surface of the ring that is in contact with the tip surface of the chuck. It is possible to insert the ring while maintaining the correct distance at all times, and the stop lever is released from the tip of the drill when the ring is inserted in the correct position, and the feed operation is then started. This has the operational advantage of completely preventing damage to the drill tip, and in addition,
The combination of the first and second adjustment screws allows rings to be inserted into drills of various sizes at desired positions with high precision, and in combination with the full automation of the device, its practical value is extremely great.

[Brief explanation of the drawing]

Fig. 1 is a front view illustrating the state in which the drill and chuck are removed, Fig. 2 is a side view showing a conventional manual insertion device, and Fig. 3 is a side view showing the conventional manual insertion device.
The figure is a side sectional view showing an embodiment of the present invention, and Figure 4 is Figure 3A.
-A arrow view, and FIG. 5 is a schematic front view of the upper covering part. In the figure, 1 is a drill, 2 is a ring, 11 is a machine base, j2 is a holding drum, 14 is a holding groove, 14a is a recess, I5 is a supply shoe 1-. 16 is a loss/z-), 22 is a plunger positioning arm, 24a is a pressurized part, 24b is a rear end part, 25 is a pivot part, 26 is a spring, 27 is a leaf spring, and path is a first adjustment screw. Reference numeral 31 represents a second adjustment device, and 32 represents an electromagnet. Patent applicant Union Tool Co., Ltd.

Claims (1)

[Scope of Claims] A rotatable holding drum in which a plurality of holding grooves are provided on the circumferential surface at equal intervals along the axial direction, and a supply sheet and a discharge sheet arranged on both sides of the holding drum. and a positioning arm disposed on one end surface side of the holding drum, with the distal end thereof being positioned on the holding groove, and pivotally attached to this positioning arm. and a stop lever disposed on an extension line of the retaining groove to face the retaining groove, and a drill pressing plunger disposed so as to freely protrude with respect to the retaining groove, and the retaining groove is connected to the supply groove. The stop lever is formed in a shape capable of accommodating a drill and a ring inserted from the chute, and the stop lever is placed under the action of a spring provided between the stop lever and the positioning arm, and the upper end of the stop lever is projected onto the positioning arm, 1. This positioning arm can be freely pressurized. A second adjustment screw is provided on the positioning arm, and a second adjustment screw is located on one side of the stop lever so that the stop lever can be freely suppressed, and a second adjustment screw is placed on the other side so that the stop lever can be freely sucked. 1. An automatic inserting device for a drill positioning ring, characterized in that the positioning arm is provided with an electromagnet, and a pressed part is provided at the tip of the positioning arm to be pressed by the ring accommodated in the holding groove.