JPS62124869A - Method for truing and dressing of metal bonded grinding stone - Google Patents

Abstract

PURPOSE:To permit good discharge of chips by adding ultrasonic vibration to a grinding stone through electrification of a conductive machining grindstone placed in electrolytic liquid and making machining while rotating the grinding stone and abutting it to the machining grindstone. CONSTITUTION:Through actuation of a motor 4, a machining grindstone 11 is ground by a grinding stone 1 and direct voltage is applied between electrolytic 9 which passes through the passage 5 of a spindle 3 and the machining grindstone 11. Next, carbon and metal are stuck to the machining grindstone 11 through action of electrolytic current, then truing and dressing are made. Furthermore, in case the system giving ultrasonic vibration is used, a ultrasonic transducer 3-2 is vibrated by an ultrasonic oscillator 3-5. This produces such effects that in truing and dressing, a resistance is small due to ultrasonic vibration and cavitation and discharge of chips can be improved.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention is directed to the truing (reshaping) and dressing (reshaping) of metal bond grinding wheels using electrolytic energy and ultrasonic vibration energy. ).

(Prior art and problems to be solved) The conventional truing method and dressing method use a Guyarmond grindstone or a GC grindstone to rotate the metal bond grinding wheel to be trued or dressed, and apply pressure to the shape. However, especially when grinding fine ceramics these days, the frequency of truing and dressing is increasing, and the accuracy is high. It is difficult to meet these demands, and in the case of production machinery, it is difficult to automatically set optimal truing and dressing conditions. Moreover, if the whetstone used for truing or dressing has core wobble during rotation, the machining resistance will increase, and the weaker of the partner whetstones may be damaged, or accuracy may deteriorate depending on the rigidity of the equipment. .

Therefore, in the present invention, in order to eliminate these drawbacks, an electrolytic current is applied between the grinding wheels, and an ultrasonic vibration is further applied thereto.

[Structure of the Invention] (Means for Solving the Problems) (1) The truing and dressing method for a metal bond grinding wheel in the present invention applies to a conductive grinding wheel placed in an electrolytic solution. Processing is performed by energizing the grinding wheel and bringing it into contact with the processing wheel while rotating the grinding wheel.

(2) The method of truing and dressing a grinding wheel manufactured by Medalpond in the present invention involves energizing a conductive grinding wheel placed in an electrolytic solution, applying ultrasonic vibration to the grinding wheel, and rotating the grinding wheel. Processing is performed by bringing the material into contact with a processing whetstone while moving the material.

(Example) An example of the first invention will be described in detail based on the apparatus shown in FIG. 1. Reference numeral 1 denotes a grinding wheel made of metal bond, and shows a core drill made of diamond metal bond. Reference numeral 2 is formed of an alloy into a cylindrical shape, and holds the grinding wheel 1. A spindle 3 holds the base metal 2 and is driven by a motor 4. This spindle 3 has a cross-shaped passage 5 inside.
is provided, the lower end communicates with the inside of the metallurgy 2, and both ends are opened on the outer periphery. An electrolytic solution supply device 6 is provided around the outer periphery of the spindle 3, and is mounted so that the spindle 3 can rotate. This electrolyte supply tool 6 has a liquid reservoir 7 on its inner surface.
is provided so as to communicate with the passage 5, and the electrolytic solution 9 is introduced from the inlet 8, passes through the inside of the grinding wheel 1, and flows down into the electrolytic solution tank 10 installed below.

On the other hand, an electrolyte solution 9 is stored in an electrolyte solution tank 10, and a processing grindstone 11 is placed inside the electrolyte solution tank 10. The processing grindstone 11 needs to be electrically conductive, such as a carbon-containing GC grindstone or a non-conductive grindstone such as vitrified grindstone that is plated to make it conductive. The processing grindstone 11 is connected to a DC power source 12, and the other end of the DC power source 12 is connected to a carbon brush 13 attached to the spindle 3.

Note that salt water, sodium nitrite, or the like is used as the electrolyte.

In the above state, the motor 4 is driven to perform grinding while bringing the grinding wheel 1 into contact with the processing wheel 11, and a DC voltage is applied between the electrolyte 9 passing through the passage 5 of the spindle 3 and the processing wheel 11. While adding, an electrolytic current is applied to cause carbon and metal to adhere to the grinding wheel 11, and truing and dressing of the grinding wheel 1 is performed.

In addition, the grinding wheel l can be used in addition to core drills, flat grinding wheels,
It can be applied to various types of wheels such as cylindrical grinding wheels and grooving wheels.

Further, the electrolytic solution may not only be passed through the inside, but may also be supplied from the outside of the grinding wheel 1 using a hose or the like.

Next, the second embodiment of the invention will be specifically explained based on the device shown in FIG.
1, the ultrasonic horn 3-1 is connected to the ultrasonic vibrator 3-2, both of which are mounted inside the supporting outer cylinder 3-3, and the carbon brush 3 attached to the supporting outer cylinder 3-3 is connected to the ultrasonic horn 3-1. -4, the ultrasonic vibrator 3-2 is vibrated by an ultrasonic oscillator 3-5. And support outer cylinder 3-3
is driven by a motor 4-.

Further, a passage 5 for a grinding fluid is provided in the ultrasonic horn 3-1, and an electrolyte is introduced from an electrolyte supply device 6.

As in the first invention, the electrolytic solution flows down inside the base metal 2 and the grinding wheel 1.

Also, the carbon brush 13 is attached to the base metal 2 and connected to the DC power supply 1.
2, the current flows through it.

The rest is the same as the first invention, so the same reference numerals are given and the explanation will be omitted.

In the second invention, in addition to the grinding and machining using electrolytic current in the first invention, ultrasonic vibration is applied to reduce resistance and improve discharge of machining waste by cavitation.

[Effects of the first invention] In the first invention, the resistance of truing and dressing can be lowered by adjusting the voltage.

Further, even if the grinding wheel has rotational center runout during molding, processing can be carried out without difficulty.

[Effects of the second invention] In the second invention, due to ultrasonic vibration and cavitation that are not present in the first invention, truing and dressing operations have less resistance than the first invention, and processing waste can be discharged. The effect is that the condition becomes better.

Furthermore, the magnitude of the effect can be controlled by controlling the amplitude of the ultrasonic waves.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an apparatus used to carry out the first invention of the truing and dressing method for a metal bond grinding wheel according to the present invention, and FIG. 2 is a cross-sectional view of the apparatus used to carry out the second invention. FIG. 1... Grinding wheel, 9... Electrolyte, 11... Processing grindstone. Figure 1 Muso Old ILI Figure 2

Claims (2)

[Claims] (1) A metal bonded grinding wheel characterized in that a conductive grinding wheel placed in an electrolytic solution is energized, and the grinding wheel is brought into contact with the processing wheel while rotating to carry out processing. truing and dressing methods. (2) Processing is performed by energizing a conductive grinding wheel placed in an electrolytic solution, applying ultrasonic vibrations to the grinding wheel, and bringing it into contact with the grinding wheel while rotating. A method for truing and dressing a metal bond grinding wheel.