JPH052444B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grinding device, and more particularly to a grinding device capable of performing general normal grinding and electric discharge grinding by connecting electrodes.

Conventionally, grinding devices include normal grinding devices and electric discharge grinding devices, and none of them are commonly used. In other words, electrical discharge grinding requires energizing equipment and a current-carrying grindstone. For example, in normal electrical discharge electrolytic grinding, when applying a pulse voltage to the workpiece, a dedicated pulse generator is required. As a processing method that does not require this pulse generator,
There is a method in which electrodes are provided radially from the center of the grindstone toward the periphery as shown in FIG. 1, but this method has the following problems.

1. In order to change the number of pulse oscillations, it is necessary to change the rotation speed of the grindstone. That is, each workpiece requires a unique grindstone rotation speed suited to its material, but it is difficult to match the grindstone rotation speed and pulse oscillation frequency.

2. If you want to change the number of pulse oscillations without changing the number of rotations, you need to replace the grindstone with one that has a different number of electrodes.

3. Since it is necessary to bury the electrodes, the production of the grindstone becomes complicated, and due to its structure, it is impossible or extremely difficult to produce extremely thin products, and its strength is also weak.

This invention was invented in view of these points, and is an apparatus that performs electrical discharge/electrolytic grinding by applying a voltage between a grindstone rotated by a drive machine and a workpiece, and supplying an electrolytic solution between them. The object of the present invention is to provide a grinding device characterized in that an intermittent power supply mechanism is attached to the rotating shaft of the grindstone.

According to this invention with the above configuration, even a normal grinding device can be easily modified into a grinding device for electrical discharge/electrolytic grinding, without changing the rotation speed of the grinding wheel or requiring a special pulse oscillation power source. It has various features and effects, such as being able to generate pulses, and also being able to perform normal grinding when not energized.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 FIG. 2 is a side cross-sectional view of a main part of a grinding device according to the present invention. In the grinding device 1, a rotating shaft 3 whose base end is connected to a prime mover (not shown) is pivotally supported on a support 2, and the distal end of the rotating shaft 3 is provided with flanges 4 on both sides.
A grindstone 5 held between the rotating shaft 3 and the support body 2 is attached via a mounting tool 6, and an intermittent power supply mechanism 7 is attached to an intermediate portion between the grindstone of the rotary shaft 3 and the support body 2. The intermittent power feeding mechanism 7 includes an insulating recess 8a formed on the circumferential surface of the rotating shaft 3.
It consists of an intermittent power supply part 8 including an intermittent power supply part 8 and a power supply tool 9 arranged so as to be able to come into sliding contact with the circumferential surface of the intermittent power supply part 8. As shown in FIG. A plurality of recesses (four in the figure) are provided at regular intervals in the circumferential direction, and therefore, in this part, insulating recesses 8a... and contact parts 3a... are alternately formed on the circumferential surface of the rotating shaft 3. It is formed. The power supply tool 9 is made of carbon black and has a cord 9a connected to a power supply (not shown) attached to one end of the power supply tool 9. When the rotating shaft 3 rotates, the contact portion 3
It is configured to be in sliding contact with a to supply power.

According to the present invention having the above configuration, the workpiece 10 can be subjected to normal grinding by eliminating the contact between the power supply tool 9 in the intermittent power supply mechanism 7 and the rotating shaft 3 or by not supplying electricity. When power is applied while the power supply tool 9 is in contact with the contact portion 3a of the rotary shaft 3, as the rotary shaft 3 rotates, the power supply tool 9 contacts the contact portion 3a.
a and the insulating recess 8 alternately and contact only the contact portion 3a. Therefore, it is possible to apply a pulse voltage to the workpiece 10 using the grindstone 5 rotated by the rotary shaft 3 without using a special pulse generator to perform electrical discharge electrolytic grinding.

In the above configuration, an insulator 11 may be embedded in the insulating recess 8a as shown in FIG. 4. By embedding the insulator 11, the power supply tool 9' can smoothly slide into contact with the contact portion 3'a.

FIG. 5 shows another embodiment in which an intermittent power supply member 19' is fitted around the rotating shaft as an intermittent power supply section 19. The grinding device 12 has a rotating shaft 14 whose base end is connected to a prime mover (not shown) supported on a support 13. An intermittent power feeding mechanism 15 is attached to the tip of the rotating shaft 14, and flanges 16 are attached to both sides of the rotating shaft 14. Grinding stone 1
7 is worn with a mounting device 18. The intermittent power supply mechanism 15 consists of an intermittent power supply member 19' and a power supply tool 20 that supplies electricity by sliding on the circumferential surface of the intermittent power supply member 19'.As shown in FIG. A cylindrical member having a shaft hole 21 and configured to be detachably fitted into the shaft hole 21 on the rotating shaft 14, and having a plurality of insulating recesses 22 on the peripheral edge thereof at regular intervals in the circumferential direction. When the intermittent power supply member 19' rotates, the power supply tool 20 that comes into sliding contact with the circumferential surface alternately faces the insulating recess 22 and the contact parts 19'a, and is configured so that it makes sliding contact only with the contact part 19'a. are doing.

According to this embodiment having the above configuration, the intermittent power supply member 19' can be attached to the rotating shaft 14 of a ready-made grinding device, and the number of pulses can be adjusted without changing the rotational speed of the grinding wheel. There are effects that can be changed simply by selecting the As shown in FIG. 7, an insulator 23 can be embedded in the insulating recess 22 of the intermittent power supply member 19', so that the power supply tool 20 can smoothly slide on the circumferential surface during rotation. There is an effect that is carried out.

8 to 10 show the front side of the intermittent power supply member that can be divided. Since the intermittent power supply member 19' shown in FIGS. 5 to 7 cannot be attached or removed without removing the grindstone 17, here we provide an intermittent power supply member that can be attached or detached without removing the grindstone. The intermittent power supply member is divided into a plurality of parts in the circumferential direction along a radial dividing line passing through the axis of the 24-shaped intermittent power supply member, and is configured to be assembled and fixed using fixing devices (for example, screws, bolts, and nuts) not shown. are doing. Although the figure shows an embodiment in which the insulator 24a is buried for insulation, it is natural that it can be formed as an insulating recess as described above. Further, as shown in FIG. 10, it is also possible to change the pulse by combining insulators 24a having different numbers, widths, etc.

FIG. 11 shows an embodiment in which a plurality of insulating recesses are formed in the axial direction of the intermittent power supply section 26 formed on the rotating shaft.
On the peripheral surface of the rotating shaft 25, insulating recesses 26' of the intermittent power supply section 26 are formed at regular intervals in the circumferential direction on the peripheral edge of the shaft cross section, similar to those shown in FIGS. 2 and 3. has been done. However, the insulating recess 26' of the lever
... is also formed in the longitudinal direction of the rotating shaft 25, in which a plurality of insulating recesses 26 ¹ ... 26 ⁿ are arranged at regular intervals, and the number of insulating recesses 26 ¹ ... 26 ⁿ on the shaft peripheral surface is different for each arrangement. I have it inserted.

Specifically, in FIG. 11, there are four insulating recesses 26 ¹ on the left side, and 10 insulating recesses 26 ⁿ on the right side.
By this,
By moving the power supply tool 27, the insulation recess 2
6 ¹ ...26 ⁿ per revolution of the rotating shaft 25 can be selected, that is, the pulse change can be selected. In FIG. 11, each insulating recess 2
Of course, an insulator can be buried in 6 ¹ ...26 ⁿ .

FIG. 12 shows an embodiment in which a plurality of intermittent power supply members of the intermittent power supply mechanism 32 are fitted to the rotating shaft. Rotating shaft 28
A plurality ^of intermittent power supply members 29 ¹ . The intermittent power supply members 29 ¹ ... 29 ⁿ shown in FIGS. The number of bodies 30 is different. Therefore, each intermittent power supply member 29 ¹ to 29 ⁿ of the power supply tool 31 can be adjusted by moving the position of the power supply tool 31 that is in sliding contact with the circumferential surface of the intermittent power supply member 29 ¹ ... ^{29 n.}
It is possible to select the sliding contact with the contact point, that is, the effect is that the change in the number of pulses can be freely selected. In addition, in FIG. 12, the intermittent power supply member 2
Although a plurality of numbers 9 ¹ to 29 ⁿ are used, it is also possible to form an integral shape in which a shaft hole is bored in the axial center of the rotating shaft 25 shown in FIG. 11.

FIG. 13 shows an embodiment in which the power supply tool in the intermittent power supply mechanism is shaped like a roller. In this figure, the intermittent power supply mechanism 33 is an insulator 3 on the circumferential surface of the rotating shaft 34.
A power supply tool 36 which is in sliding contact with the contact portion 34a of the power supply device 5 and the contact portion 34a is mounted as a roller body on a support body 37 with a shaft 38.
As a result, since the power supply tool 36 is a roller, power can be supplied smoothly and there is less wear due to sliding contact.

FIGS. 14 and 15 show other embodiments of the power supply tool.

In FIG. 14, a roller-shaped power supply tool 41 is attached to a support 39 via a shaft 40. As shown in FIG. The power supply tool 4
Insulating parts 42 are formed at regular intervals in the circumferential direction on the peripheral edge of the power supply device 1, and the power feeding parts 41a of the power feeding tool 41 are alternately exposed on the circumferential surface between the insulating parts 42.
According to this embodiment having the above configuration, the insulating recesses 8, 26 ¹ to 26 ⁿ of the rotating shaft described above, and the insulator 1
1, 23, 24a, 35 or intermittent power supply member 1
9, 29 ¹ to 29 ⁿ is not required, and this power supply tool 41 can be brought into direct contact with the rotating shaft or grindstone (flange), and pulse voltage can be applied via the grindstone without the need for any other pulse oscillation device. can be applied to the workpiece.

FIG. 15 shows another embodiment of the roller-shaped power supply tool shown in FIG.
4, the power supply device 44 is formed of an insulating material, and a plurality of current-carrying material portions 45 are embedded in the peripheral portion thereof at regular intervals in the circumferential direction.
A conductive portion 45a connected to the shaft is appropriately formed toward the axial center portion. According to this embodiment configured in this way, electricity is transmitted to the support body 43, the shaft 43a, and the conductive part 4.
5a to the current-carrying material part 45, and the rotating shaft and the grindstone are intermittently energized, so the pulse voltage is applied to the workpiece via the rotating shaft and the grindstone, similar to the power supply tool 41 shown in FIG. can be applied. Note that the power supply devices 41 and 44 shown in FIGS. 14 and 15
A plurality of can be attached to the shafts 40 and 43 in parallel. In that case, contrary to the embodiment shown in Fig. 12, a power receiver (not shown) should be installed on the rotating shaft so that it can slide in the longitudinal direction of the rotating shaft, or a power supply device should be able to slide freely in the longitudinal direction of the rotating shaft. The change in the number of pulses is selected by selecting contacts with multiple power supply devices.

FIG. 16 shows an embodiment in which an insulator is interposed between the rotating shaft and the grindstone. Figure 17 is A of Figure 16.
-A sectional view. A grindstone 52 is attached to the tip of the rotating shaft 46 via an insulating intermittent power supply mechanism 47 . The insulating intermittent power supply mechanism 47 has a shaft hole 48 made of an insulating material, a cylindrical insulating intermittent power supply member 50 whose outer peripheral part 49 is made of a current-conducting material, and a power supply tool 5.
1, and a plurality of insulator embedded portions 56 are arranged on the circumferential surface of the outer peripheral portion 49 in the circumferential direction in the cross section. The outer circumferential portion 49 has a tip portion cut out to form a small diameter portion 49a, and a grindstone 52, which is sandwiched on both sides by flanges 53, is fitted onto the small diameter portion 49a and is fastened and fixed by a tightening member 54.

Further, the insulating intermittent power supply member 50 is fitted onto the tip of the rotary shaft 46 and fixed by tightening with a fixing screw 55. According to this embodiment configured as described above, the rotating shaft 46 and the grindstone 52 are insulated by the insulating shaft hole 48, and electricity from the power supply tool 51 is transmitted to the grindstone 52 via the outer circumference 49. Since it is energized and insulator buried portions 56 are intermittently formed on the circumferential surface of the outer circumferential portion 49, when it rotates, it is connected to the rotating shaft 46 and the device connected thereto from the grinding wheel 52 to the workpiece 57. A pulse voltage is applied without any need for electric discharge electrolytic grinding, and since it is detachable, it can be used in ready-made equipment.

Although this invention has been explained by illustrating a disc-shaped grindstone, the shape and structure of the grindstone are not limited, and the shape and structure of each member etc. can be arbitrarily changed in design. This configuration has the effect that discharge electrolytic grinding can be performed on any shape and size of the grindstone as long as the grindstone is conductive.

In addition, the size of the power supply tool that slides into contact with the intermittent power supply section,
By changing the shape, the energizing time and non-energizing time can be changed by arbitrarily changing the time of sliding contact with the conductive and non-conductive parts of the intermittent power supply part, and the oscillation waveform can be freely changed without changing the pulse oscillation frequency. Of course, it can be adjusted.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a conventional electric discharge grindstone. Fig. 2 and the following are related to the present invention, Fig. 2 is a sectional side view of the main part of the grinding device, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a sectional view of another embodiment of the intermittent power supply member. , FIG. 5 is a side sectional view of the main part of the grinding device showing another embodiment, and FIG.
7 is a sectional view showing another embodiment of the intermittent power feeding member in FIG. 5, FIGS. 11 and 12 are side views of main parts showing other embodiments of the intermittent power feeding mechanism, and FIGS. 13, 14, and 15 are front views showing other embodiments of the power feeding device.
FIG. 6 is a side sectional view of the insulating intermittent power supply mechanism, and FIG. 17 is a sectional view taken along line A-A in FIG. 16. 1... Grinding device, 2... Support body, 3, 3'...
Rotating shaft, 3a, 3'a... Contact portion, 4... Flange, 5... Grindstone, 6... Fitting tool, 7... Intermittent power supply mechanism, 8... Insulating recess, 9... Power supply tool, 9a... …
Code, 10... Workpiece, 11... Insulator, 1
2... Grinding device, 13... Support body, 14... Rotating shaft, 15... Intermittent power supply mechanism, 16... Flange,
17... Grindstone, 18... Wearing tool, 19... Intermittent power supply part, 19'... Intermittent power supply member, 19'a... Contact part, 20... Power supply tool, 21... Shaft hole, 22... Insulation Recess, 23, 24a... Insulator, 24... Intermittent power supply member, 25... Rotating shaft, 26... Intermittent power supply part, 26 ¹ to 26 ⁿ ... Insulating recess, 27... Power supply tool, 28... Rotation Axis, 29... Intermittent power supply section, 29
¹ to 29 ⁿ ... Intermittent power supply member, 30... Insulator, 3
1...Power supply tool, 32, 33...Intermittent power supply mechanism, 3
4...Rotating shaft, 34a...Contact part, 35...Insulator, 36...Power supply tool, 37...Support body, 38...
Shaft, 39... Support body, 40... Shaft, 41... Power feeding tool, 41a... Power feeding part, 42... Insulating part, 43...
... Support body, 43a ... Shaft, 44 ... Power supply tool, 45
. . . Current-carrying material portion, 45a .
...Insulating intermittent power supply member, 51...Power supply tool, 52...
...Whetstone, 53...Flange, 54...Tightening member,
55...Fixing screw, 56...Insulator buried part.

Claims (1)

[Scope of Claims] 1. In a device capable of performing electrical discharge and electrolytic grinding by applying a voltage between a grindstone rotated by a drive machine and a workpiece and supplying an electrolyte between them, is an intermittent power supply section in which insulating parts are arranged at intervals in the circumferential direction on the circumferential surface of a rotating shaft or on the circumferential surface of a cylindrical member fitted onto the rotating shaft;
A grinding device characterized in that it is equipped with an intermittent power supply mechanism consisting of a power supply tool that is in sliding contact with the grinding device. 2. The grinding device according to claim 1, wherein in the device, a plurality of intermittent power supply portions are formed in the axial direction of the rotating shaft. 3. The grinding device according to claim 1, wherein the power feeding tool is a roller body that slides into contact with the intermittent power feeding section. 4 In a device that can perform electrical discharge and electrolytic grinding by applying a voltage between a grinding wheel rotated by a drive machine and a workpiece and supplying an electrolyte between them, the rotating shaft of the grinding wheel has a rotating shaft, etc. 1. A grinding device equipped with a roller power supply tool that rotates in sliding contact with a rotating member and has an intermittent power supply section around which a plurality of insulating sections are arranged at intervals in the circumferential direction.