JP2012096309A - Tapping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tapping device capable of removing chips adhering to a tapping body, giving lubricity to the tapping body and suppressing the consumption of a lubricant to the minimum.SOLUTION: The tapping device includes: a tool unit having the tapping body 18 which is rotatable by receiving the driving of a rotationally driving source; an operation unit supporting the tool unit movably to a desired position; a container 40 which is provided in the movable region of the tool unit, has an opening so that the tapping body 18 can be inserted and stores a lubricant 41; and a magnet 42 disposed so as to form a magnetic field in the lubricant 41 of the container 40. Thereby, the chips 30 adhering to the tapping body 18 can be removed, the lubricity is given to the tapping body 18 and the consumption of the lubricant 41 can be suppressed to the minimum.

Description

The present invention relates to a tap processing apparatus that includes means for removing chips adhering to a tap body and prevents damage to the tap body and defective tap formation during tap processing.

A conventional tapping machine holds a tap body on a chuck to which the rotational power of a motor is transmitted, and rotates the tap body perpendicularly to a prepared hole machining surface of a workpiece subjected to a prepared hole machining. It was the apparatus structure which descend | falls and forms a tap.

Since the inner diameter of the pilot hole is set to be smaller than the outer diameter of the tap body, chips are generated from the pilot hole during the tapping process and adhere to the tap body. By the tap body with chips attached,
When the next pilot hole is tapped, chips are caught in the inner surface of the pilot hole and the tap body, and the cutting resistance generated during tapping is higher than that in normal tapping without chips. Become.
In such tap processing, there is a high possibility that the tap main body is damaged or a tap formation failure occurs.

As a general method for reducing the cutting resistance during the above-mentioned processing, using a brush or the like coated with a lubricant before tapping, removing chips adhering to the tap body, and at the same time providing lubricity to the tap body. There was something to give. Alternatively, before and during the tap processing, some lubricants are constantly or appropriately supplied to the tap main body to remove chips adhering to the tap main body, and at the same time, impart lubricity to the tap main body.

In addition to the above-described chip removal method, a chip removing member that is always in contact with the region of the tap body that can touch the workpiece during tap processing, as shown in Patent Document 1, is arranged, and the tap body rotates during tap processing. In addition, there are some which forcibly remove chips adhering to the tap body without using a lubricant to the tap body.

JP-A-6-285716

However, in the conventional tap processing apparatus shown in Patent Document 1, chips attached to the tap body are forcibly removed by the chip removing member, but at the same time, the lubricity of the tap body is lost,
Cutting resistance generated at the time of tapping is increased, and problems such as damage to the tap body, defective formation of the tap after processing, and shortening of the life of the tap body have also occurred. Further, the above-mentioned conventional chip removal method and the above-described conventional method for reducing the conventional cutting resistance are combined, and the following 2
A street tapping method can be considered. The first is a method of providing the chip removal member and supplying a lubricant to the tap body during tapping, and the second is a method of supplying the lubricant in a timely manner. In the method of constantly supplying the lubricant, there is a problem of consuming a large amount of the lubricant. In the method of supplying the lubricant in a timely manner, the lubricant adhered to the tap body by the chip removing member is the same as described above. Since it was forcibly removed, there was a problem that the cutting resistance during tapping became high.

The present invention has been created in view of the above problems, and taps that provide lubrication to the tap body at the same time as the removal of chips adhering to the tap body and minimize the consumption of lubricant. The purpose is to provide a processing device. In order to achieve this object, the present invention provides a tool unit having a tap body that is rotatable by being driven by a rotational drive source, an operation unit that supports the tool unit so as to be movable to a desired position, and the tool unit. A structure that is provided in the movable region and has a container in which a tap main body has an opening so that the tap body can enter and stores a lubricant, and a magnet that is arranged to form a magnetic field in the lubricant of the container. is there. The lubricant may be a cutting oil having a lubricating performance, and the magnet may be a permanent magnet or an electromagnet.

The tap processing apparatus of the present invention can simultaneously remove chips adhering to the tap body and impart lubricity to the tap body. As a result, damage to the tap body and poor tap formation can be reduced, and there are advantages in improving the life of the tap body. Furthermore, since the lubricant is stored in the container, it can be used repeatedly, and there is an advantage of minimizing the consumption of the lubricant.

It is a partial notch sectional view of the tap processing apparatus concerning this invention. It is sectional drawing which showed the effect concerning this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 90 is a tapping device, and this tapping device 90 includes a tool unit 60, an operation unit 50,
A lubrication unit 70 and a clamp unit 80 are included.

The tool unit 60 has a grip 16 disposed below the motor 15 that serves as a rotational drive source.
A chuck 17 configured to transmit the rotation of the motor 15 is disposed immediately below the grip 16. Further, the chuck 17 is configured to hold the tap body 18 so that the tap body 18 can be attached and detached. The grip 16 has a structure that does not transmit the rotation of the chuck 17, and has a function of pressing down to activate the motor 15.

In the operation unit 50, the first arm 4 is pivotably disposed via a bearing 3 on an upper portion of the column 1 that is erected vertically to the column base 2. In addition, a fall prevention stopper 20 is disposed below the first arm 4 of the support 1 so that the first arm 4 does not fall along the support 1.
A shaft 5 is erected on the front end of the first arm 4 via a bearing 13a, and an arm connecting bracket 19 is rotatably arranged on the shaft 5 via a bearing 13b. . Links 9a and 9b are connected to the arm connecting bracket 19 by pins 10a and 10b so as to be rotatable in a vertical plane. A tool bracket 14 is connected to the tips of the links 9a and 9b by pins 10c and 10d. The arm connecting bracket 19, the links 9a and 9b, and the tool bracket 14 form a parallel link, and the tool unit 60 held by the tool bracket 14 is configured to be rotatable while maintaining a vertical posture in the axis line. . A spring hook 7 is disposed near the center of the link 9a, and a spring hook 6 is disposed above the shaft 5. A spring 8 serving as a tension spring is suspended from these. Due to the tension of the spring 8, the links 9 a and 9 b and the tool bracket 14 are always pulled upward, and the tool unit 60.
It is configured so that it can support its own weight.

The lubrication unit 70 has a configuration in which the lubricant 41 is stored in the container 40 opened on the upper surface, and the magnet 42 is disposed outside the opening of the container 40. The magnet 42 forms a magnetic field in the lubricant 41 in the container 40.

The clamp unit 80 has a configuration in which a clamp 38 that holds the workpiece 34 provided with the pilot hole 35 is disposed on the base surface.

In the tool unit 60 described above, the means for starting the motor 15 is not limited to the above-described embodiment, and a separate start switch (not shown) may be provided in the operation unit 50 or the like. Further, the tool bracket 14 of the operation unit 50 is configured to move up and down only in the vertical direction, or a robot and an air cylinder whose posture can be freely changed in accordance with the advancing direction of the tap body 18 during tap processing such as up / down / left / right and turning. It is good also as a structure which consists of an actuator. On the other hand, the lubricant 41 in the above-described lubrication unit 70 may be a cutting oil having lubrication performance, and the magnet 42 in the lubrication unit 70 may be a permanent magnet or an electromagnet.

In the tap processing device 90 configured as described above, in order to remove the chips 30 adhering to the tap body 18, as shown in FIG. 2, the tap body 18 is immersed in the lubricant 41 stored in the container 40,
Holding the grip 16 downward, the motor 15 is driven. As the motor 15 is driven,
The chuck 17 and the tap body 18 held by the chuck 17 rotate. This
The chips 30 adhering to the tap body 18 are washed away by the lubricant 41. At the same time, a lubricant 41 is applied to the tap body 18 to provide lubrication performance in the subsequent tapping process. The chips 30 floating in the lubricant 41 are attracted and held on the wall surface and bottom surface of the container 40 by the magnetic force of the magnet 42 and are prevented from reattaching to the tap body 18. Therefore, the lubricant 41 adhering to the tap body 18 can be made clean and can have sufficient lubrication performance. Furthermore, since the lubricant 41 is stored in the container 40, it can be used repeatedly, and there is an advantage of minimizing its consumption.

DESCRIPTION OF SYMBOLS 1 support | pillar 2 support base 3 bearing 4 1st arm 5 shaft 6 spring hook 7 spring hook 8 spring 9a link 9b link 10a pin 10b pin 10c pin 10d pin 13a bearing 13b bearing 14 tool bracket 15 motor 16 grip 17 chuck 18 tap body 19 Arm coupling bracket 20 Fall prevention stopper 30 Chip 34 Workpiece 35 Prepared hole 38 Clamp 40 Container 41 Lubricant 42 Magnet 50 Operation unit 60 Tool unit 70 Lubrication unit 80 Clamp unit 90 Tap processing device

Claims (4)

A tool unit having a tap body that is rotatable by being driven by a rotation drive source, an operation unit that supports the tool unit so as to be movable to a desired position, and a tap body that is provided in a movable region of the tool unit. A tapping apparatus comprising: a container having an opening as much as possible and storing a lubricant; and a magnet arranged to constitute a magnetic field in the lubricant of the container. The tapping apparatus according to claim 1, wherein the lubricant is a cutting oil having lubricating performance. The tapping apparatus according to claim 1 or 2, wherein the magnet is a permanent magnet. The tapping apparatus according to claim 1 or 2, wherein the magnet is an electromagnet.

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