JPS5935990B2 - Electric discharge coating processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an electric discharge coating processing apparatus that generates electrical discharge between a vibrating coating material electrode and a workpiece to weld and coat a part of the tip of the electrode material Q onto the workpiece.

If the coating process is continued for a long time, the increase in the amount of coating process will gradually decrease, and eventually the part of the coating layer that has been coated will become electrically discharged.
V) It was not possible to increase the amount of processing to a predetermined level because the amount of material could be reduced by melting and scattering due to heating, etc., or by transfer welding to the electrode side. According to various tests and studies, the reason for this is that when the surface of the coating becomes uneven, it is difficult to laminate the coating even if the coating is further processed. In view of this point, the present invention makes it possible to reduce the coating surface roughness and increase the amount of coating processing. The method is characterized in that it is provided with a vibrating or rotating drive device, and performs coating and friction polishing at the same time.

To explain the present invention with reference to one embodiment, Fig. 1 shows an example in which vibration is performed in the right angle direction, 1 is a covering material electrode, and the covering material is made of carbide such as WC, TiC, etc. in order to harden its surface. An alloy is used, which is attached to the vibrating head support 2.

The support part 2 is fixed to the vibrating piece 3. Reference numeral 4 denotes an electromagnet that vibrates in the z-axis direction, which attracts and separates the magnetic piece 5 fixed to the vibrating piece 3, causing it to vibrate.

In other words, the vibrating piece 3 has a spring property V) This elastic force and the electromagnet 4
generates vibration in the z-axis direction with the suction force of 6 is the vibrating piece 3
An electromagnet that vibrates in the X-axis perpendicular to the Z-axis (that is, perpendicular to the plane of the paper) attracts and separates the opposing magnetic pieces 7. The magnetic piece T is fixed to the vibrating piece 3, and the elasticity of the vibrating piece 3 and the electromagnet Vibration in the X-axis direction is performed with the suction force of 6.

Reference numeral 8 denotes a housing configured to cover and hold the entire body, and an electromagnet operating power source, a pulse power source for discharging, etc. are separately installed and connected by leads.

The coating material electrode 1 is provided facing the workpiece 9 and is vibrated along the Z-axis by an electromagnet 4 to vibrate in contact with and release from the machined surface of the workpiece 9 .

The frequency is usually about 100 Hz to 30 KHz, and is controlled by the excitation frequency of the electromagnet 4. The vibration stroke is controlled by adjusting the gap between the magnet 4 and the magnetic piece 5. The covering material electrode 1 attached to the support part 2 fixed to the vibrating piece 3 contacts and separates from the workpiece 9 to cause pulse discharge, and the tip of the electrode material melted by the discharge heat is transferred to the workpiece 9. The coating process is performed by repeating welding and cooling while the electrode 1 vibrates. During the coating process, along with the Z-axis vibration, the electromagnet 6 also causes a perpendicular X-axis vibration. This vibration is also performed at a frequency of approximately 100 Hz to 30 KHz, as described above, and is controlled by the excitation frequency of the electromagnet 6. This vibration causes the tip of the electrode 1 to oscillate in the X-axis, so that the electrode 1 vibrates in contact and separation in the Z-axis, causing the workpiece 9 to vibrate.
When in contact with the workpiece 9, the workpiece 9 vibrates and slides along the X-axis while in contact, causing sliding friction on the surface of the workpiece 9. At this time, the electrode 1 acts as a polishing wheel and friction-polishes the coated surface of the workpiece 9. Since this discharge coating and polishing are performed at the same time, the coated uneven surface is polished and smoothed, and then the discharge coated surface is applied again. By repeating coating polishing, the coating layer increases at a high speed, and the coating surface is always coated with a smooth surface with small surface roughness. According to the example,
Iron material (S55C) using WC-10%CO carbide electrode
When coating the object, a transistor power source is used as the pulse power source, and the electrode is vibrated at 100 Hz in the z-axis facing the workpiece, and the gap between contact and separation vibration is τ. N85μS, τ0
ff10Its,. A pulse train of 1p65A was applied to coat and a coating of 20 mg was obtained in 5 minutes. However, when the carbide electrode according to the present invention was vibrated at 100 Hz in the X-axis direction as well as the Z-axis vibration, the same result was obtained. When machining was performed under the following conditions, the amount of machining for 5 minutes was 28 mg, and the coating surface roughness was 24 μRmax when only the Z-axis vibration was applied, but it became 17 μRmax when the X-axis vibration was also added. It was confirmed that the processing effect was significant. During processing, the vibrating head was manually held in such a state that the tip electrode was in light contact with the workpiece. Figure 2 shows an example in which rotation is performed in a direction perpendicular to the contact-release vibration to cause sliding friction.A disc-shaped 10 is used as the coating electrode, and the peripheral edge of the disc rotates in the X-axis direction. Rotate it as shown.

Reference numeral 11 denotes its rotating motor, which is attached to the vibrating piece 12.

As in FIG. 1, the vibrating piece 12 is vibrated in the z-axis direction by the electromagnet 4 and the fixed magnetic piece 5. Disc electrode 1
0 is rotated by a motor 11, and this rotating disk electrode 10 is vibrated in the z-axis by an electromagnet 4, and its peripheral portion contacts and separates from the workpiece 9 and vibrates. Disk electrode 1 due to vibration
0 When the peripheral edge contacts the workpiece, it is rotating, so x
Sliding friction occurs in the axial direction, and a frictional abrasive action works. Therefore, in this case as well, contact and separation vibration causes the electrode 10 to
, a pulse electric discharge is performed between the workpieces 9, and at the same time the electric discharge coating is performed, the frictional polishing action works to smooth it, and by repeating this process, the amount of coating increases and the surface roughness is small and high efficiency is achieved. can be coated. The present invention has been described above by way of one embodiment, but by vibrating or rotating in a direction perpendicular to the contact-separation vibration, coating and friction polishing can be performed at the same time. It can be processed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of another embodiment. 1 and 10 are covering material electrodes, 3 and 12 are vibrating pieces, 46 is an electromagnet, 5 and T are magnetic pieces, 8 is a housing, 9 is a workpiece, and 11 is a rotating motor.

Claims (1)

[Claims] 1. In an electric discharge coating processing device that performs coating by causing a pulse discharge between the electrode and the workpiece while vibrating a coating material electrode against and away from the workpiece, the vibration direction of the contact and separation is The coating material electrode is held by a drive device that vibrates or rotates to move the coating material electrode in a direction perpendicular to the direction, and the holding and driving device is vibrated by the contact-release vibration device. A discharge coating processing device characterized by comprising: