JP2002301640A - Drill grinding oscillating loader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely position the attitude of a tip shape and to perform high- efficient continuous machining of a high precise tip grinding, in grinding of a drill tip. SOLUTION: A drill rotary holding mechanism is divided into two sets (3) and (4) of drill positioning mechanisms and a holder arm (6) oscillating in a state to hold two drills. A drill moving mechanism is relieved and the efficiency of grinding processing is improved. A drill managed by a tip end face is held in the position on the feed side of the holder arm (6). With the drill rotated, the tip part of the drill is measured by a laser measuring apparatus (5). A position optimum to grinding is detected, the tip part of the drill is moved to a processing position and grinding of tips on both sides is effected on one surface at one time. During grinding of one tip, a drill where grinding of the other one is completed is taken out. Feed positioning of a next drill is effected. A series of operation described above is controlled and efficiency is eminently improved through continuous operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to grinding of a small diameter drill tip.

[0002]

2. Description of the Related Art In a conventional drill grinder, a holding mechanism and a positioning mechanism are integrated and a swing mechanism is used. In most factories, simple operations are performed by using simple devices.

[0003]

In the conventional drill grinding machine, the holding mechanism is heavy, so that it is difficult to perform agile operation, and vibration generated by the operation hinders measurement accuracy and finish accuracy. There is a problem that the rigidity of the swing drive unit is required and maintenance is difficult.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problem of reducing the swinging portion of the holding mechanism, reducing the required space, and performing stable and high-precision drill grinding with a drill grinding swing loader. In addition, the purpose of the present invention is to make continuous operation easier and improve efficiency by using a swinging loader for drill grinding.

[0005]

In order to achieve the above object, in a drill grinding swing loader of the present invention, a holder for swinging while holding a drill and a drill positioning mechanism (3) (4). Divided into arms (6) to reduce swinging parts.

[0006] The holder arm (6) swings in the vertical direction and has a holding mechanism on both sides. While one of the drills is being ground, the other is withdrawn and the next drill is removed. And can be positioned.

[0007] When positioning by the drill positioning (3), the holding force of the holder arm (6) is weakened to facilitate rotation of the positioning mechanism.

[0008] To determine the position, while rotating the drill, measure the position of the tip most suitable for positioning with a laser measuring machine (5), and from the arithmetic and control unit to the motor (3a) for drill positioning (3). Optimum positioning for grinding by sending a command is performed.

With the above mechanism, the swinging portion can be reduced, the plane space can be reduced, and high-precision grinding can be continuously performed, thereby improving the efficiency.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIG. 1, a swing drive mechanism (2) is installed at the center on a base provided with a slide mechanism, and a holding mechanism is mounted on both sides of a swing shaft. The provided holder arm (6) is attached.

The drill positioning mechanisms (3) and (4) are installed on the left and right in accordance with the position where the holder arm (6) stops horizontally.

When supplying the drill, the tip of the drill is pushed to receive the supply and is held by the holding mechanism of the holder arm (6), so that the position of the tip is always constant.

At the time of drill positioning, the holding mechanism of the holder arm and the chuck of the positioning mechanism (FIG. 6 (3)
s)) are simultaneously held. At this time, the holding force on the holder arm side is applied to the clamp cylinder (FIG. 2 (6)).
a) The pressure in step a) is reduced to facilitate the rotation of the positioning mechanism.

While rotating the drill by the drill positioning (3), the position most suitable for the positioning of the tip is measured with a laser measuring instrument, the peak value is detected, and the data obtained from the arithmetic and control unit is obtained. It is sent to the drive motor (Fig. 4 (3b)) for drill positioning (3) to perform optimal radial positioning for drill tip grinding.

When the positioning is completed, the holding force on the holder arm is returned to the original position, and the chuck on the positioning mechanism side is opened.
The holder arm (6) is inverted by the swing drive (2) to move the drill to the grinding position.

At the grinding position, the relationship between the chucking force of the drill positioning (4) and the holding force of the holder arm is the same as described above.
a) Grind both sides of the tip end of (8b).

In the embodiment shown in FIG. 3, an air rotary actuator (2) is used as a drive source of the swing drive mechanism (2).
a) is installed, and the holder arm (6) attached to the swing shaft (2e) is vertically swung via the timing pulleys (2c) and (2d) and the timing belt (2b). The shaft also serves as a pressure air supply pipe required for the holding mechanism of the holder arm.

In the embodiment shown in FIG. 4, the mechanism of the drill positioning (3) has a stepping motor (3b) as a driving source and a timing pulley (3c) (3).
d), the shaft (3g) and the chucks (3j, 3k, 31, 3n, 3m, 3o, 3) via the timing belt (3e).
When the pin (3f) is pushed with the chuck opening / closing cylinder (3a) rotating the p), the chuck head (3m) is opened by the link mechanism using the slide pin (3o) and the hinge pin (3n) as axes, and the opening / closing cylinder is pulled. The chuck head (3m) is closed by the force of the coil spring (3p).

In the embodiment shown in FIG. 5, the drill positioning (3) the chuck portion has an Oldham mechanism,
When the drill is held and rotated, the drill does not run out.

In the embodiment shown in FIGS. 4 and 5, the grinding side drill positioning (4) has the same configuration.

[0021]

Since the present invention is configured as described above, it has the following effects.

Since the positioning of the drill tip is measured by a laser measuring device, accurate and prompt positioning and NG judgment can be performed.

By dividing the positioning mechanism and the holding mechanism and swinging only the holder arm as the holding mechanism, vibration can be reduced even if the swing speed is increased.

By equipping the holder arm with the right and left holding mechanisms, the grinding and positioning of the drill can be performed simultaneously.

By using the swing drive mechanism and the drill grinding swing loader having the above functions, efficient and continuous drill grinding can be performed automatically.

[Brief description of the drawings]

FIG. 1 is a plan view of a drill grinding swing loader.

FIG. 2 is a front view of a drill grinding swing loader.

FIG. 3 is a cross-sectional view of a drill grinding swing loader swing drive unit.

FIG. 4 is a sectional view of a drill chuck part and a drill positioning part of a drill grinding swing loader.

FIG. 5 is an exploded view of a drill chuck Oldham mechanism of a drill grinding swing loader.

FIG. 6 is a detailed view of a drill chuck head portion of the drill grinding swing loader.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Oscillating drive part 3 Drill positioning (supply and discharge side) 4 Drill positioning (grinding side) 5 Laser measuring instrument 6 Holder arm 7 Drill 8 Grinding stone unit

Claims (3)

[Claims] 1. A swing arm holding mechanism for a drill having right and left drill positioning mechanisms (3) and (4), and a holder arm (6).
While rotating the drill held at the tip fixed position on the supply side of the drill by the positioning mechanism (3), the position where the shape change seen from the upper surface of the drill tip becomes the largest is measured by the laser measuring instrument (5). A rocking loader for drilling, wherein an optimum position for tip grinding is detected by a drill positioning mechanism (3) according to a command from an arithmetic and control unit. 2. A drill grinding swing loader characterized in that a holder arm (6) is inverted by a swing mechanism (2), a drill is moved to a grinding position, and both ends are ground one by one. 3. The holder arm (6) has left and right holding mechanisms capable of switching a holding force for holding a drill to a holding force that allows the drill to rotate by a pressure variable circuit of a clamp cylinder (6a). Drill grinding swing loader.