JP2003080374A - Chip discharging device and discharging method of chip dresser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably discharge chips even when cutting quantity is made large and chip quantity is increased due to the composition of the chips which take on adhesiveness by mixing the chips with water, oil and sealer, etc., or a work on the dressing of electrode chip for welding and to prevent the chips from scattering to the surroundings, deteriorating the working environment and exerting adverse effect on surrounding-related devices, etc. SOLUTION: Upper and lower plates 8, 9 freely attachable and detachable is disposed on a head part housing 6 of the chip dresser 1, chip inserting holes 25, 33 are formed on the respective plates 8, 9, upper and lower electrode chips Ta, Tb for welding are inserted and, thereby, the dressing is made possible. An air supplying path 27 is disposed on the inside of the lower plate 9 and is connected to an air blow mechanism 11, and an air discharging path 35 is disposed on the inside of the upper plate 8 and is connected with a discharging mechanism 12. Further, during the dressing, blow air is supplied from the air supplying path 27 and is blown toward a working part K and the chips and air are discharged to a pail can 17 of the discharging mechanism 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for discharging chips generated when dressing a welding electrode tip.

[0002]

2. Description of the Related Art Conventionally, as a dressing device for an electrode tip used for spot welding, for example, a technique disclosed in Japanese Patent Application Laid-Open No. 9-182976 proposed by the applicant of the present invention is known. In a conventional general apparatus, the chips that have spontaneously dropped are collected and disposed of later without collecting the chips generated during dressing on the spot. On the other hand, as a technique for confirming the shaping state of the dressed chip, for example, Japanese Patent Application Laid-Open No. 5-245565.
Techniques such as No. 1 are known. In this technique, an optical sensor is used to check the shaping state, and at this time, chips or the like adhere to the light emitting element of the optical sensor, resulting in an erroneous determination. To avoid this, air is blown toward the light emitting element to remove chips and the like from the optical sensor.

[0003]

However, in the conventional technique of collecting chips generated during dressing without removing them on the spot as in the prior art, for example, the electrode is not mounted well and cooling water leaks. If the electrode is constantly wet, the amount of rust preventive oil applied to the welded work is large, or the weld sealer for waterproof sealing sticks to the electrode sticking out of the welding spot. When the electrode is chip-dressed, the cutting chips become wet and become sticky and the dischargeability from the dressing device is significantly reduced. Also,
In spot welding of surface-treated steel sheets such as zinc plating and aluminum plating, the alloying of copper alloy electrodes causes severe wear and deterioration.In the case of high-stainless steel materials, the electrode tip diameter expands and deforms remarkably due to increased pressure. When chip dressing, the cutting amount increases and the chips are often clogged. Further, in the case of the technique of blowing air from the outside, since the periphery of the cutting tool of the tip dresser is sandwiched by the electrodes during dressing of the electrodes, it is difficult for the air blow to reach, and like the above, the chips are reliably discharged. It was difficult. Further, there are problems that the cutting chips are scattered on the floor surface and the like, the working environment is deteriorated, and the cutting chips enter the inside of related devices arranged in the vicinity to cause malfunction.

Therefore, according to the present invention, when dressing the welding electrode tip, the chips are surely discharged, and the chips are scattered to the surroundings to deteriorate the working environment, or to adversely affect the peripheral related devices and the like. The purpose is to prevent.

[0005]

To achieve the above object, the present invention provides a chip discharging device for discharging chips generated when dressing a welding electrode tip,
An enclosing member that can substantially hermetically enclose the space around the processing part of the chip dresser when dressing is provided, and an air passage is formed in this enclosing member, and this air passage serves as an air passage from the processing portion to the processing part. An air supply path that extends toward the air discharge port and an air discharge path that extends from the processing section toward the air discharge port.An air blow mechanism is connected to the air supply port. The discharge mechanism for discharging powder and air was connected.

By supplying air from the air blow mechanism during the dressing process, the air is blown toward the processing part, and the chips and air generated in the processing part are discharged from the air discharge port and sent to the discharge mechanism. For example, the chips generated during processing can be reliably discharged to the outside from the chip discharge pocket of the chip dresser, do not scatter to the surroundings, and there is no adverse effect on the working environment or peripheral equipment. Here, the surrounding member may be one having a tip insertion hole for inserting the welding electrode tip, and when performing dressing, by inserting the welding electrode tip into the tip insertion hole, Alternatively, the periphery of the part may be enclosed in a sealed manner.

Further, according to the present invention, the surrounding member is detachably attached to the housing of the tip dresser. If the tip dresser housing is detachable as described above, it becomes possible to attach the tip dresser to an existing tip dresser afterwards, which is suitable for expanding the range of application.

Further, in the chip discharging method for discharging chips generated when dressing the welding electrode tip, the welding electrode tip is inserted into the tip insertion hole of the surrounding member to form a space around the processed portion of the tip dresser. After it has been enclosed in a substantially sealed manner, air is blown from the air supply port of the air supply path toward the chip discharge pocket having the processing part in synchronization with the operation of the dresser motor. The air is discharged from the air discharge path, and the blowing of the air is terminated at the time when the welding electrode tip separates from the tip insertion hole of the surrounding member.

As described above, the surrounding member and the welding electrode tip are arranged so that the space around the machined portion is surrounded in a substantially sealed state, and air is blown in this state to efficiently generate chips generated during machining. It is possible to discharge, and it is possible to prevent the problem that chips are scattered around.

Further, in the present invention, air is intermittently blown to the chip discharge pocket, and at other times, a negative pressure of air is applied to the chip discharge pocket. In this way, if the chips are discharged by the intermittent air blow, the chips are agitated in the chip discharge pocket when the air blow is turned on and off, and the discharging property is improved. Also,
At other times, since a negative pressure of air is applied to the chip discharge pocket, the chips will not drop from the gap between the welding electrode tip and the tip insertion hole.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an overall view of a chip discharging device for a chip dresser according to the present invention, FIG. 2 is a sectional view of a main part, FIG. 3 is a plan view of the chip discharging device, FIG.
5 is a sectional view taken along the line AA of FIG. 2, FIG. 6 is a sectional view taken along the line BB of FIG. 2, and FIG. 7 is an operation explanatory view of the air blow.

The chip discharger of the chip dresser according to the present invention prevents scattering of chips generated during the dressing process, and can eliminate the deterioration of the working environment and the adverse effects on peripheral equipment. Further, in this embodiment, since it is detachably attached to the housing of the existing tip dresser, it can be applied to the existing dressing machine.
It is configured as a device with a wide range of application.

That is, as shown in FIG. 1, a tip dresser 1 is mounted on a base 2 so that the upper and lower welding electrode tips Ta and Tb can be simultaneously dressed, and a dresser motor 3 and this dresser motor 3 are attached. A gear train housing 5 for accommodating a gear train for transmitting the rotation of the motor 3 to a holder 4 (FIG. 2) described later and a head housing 6 for accommodating the holder 4 having a dressing blade are provided. The discharging device 7 includes a pair of upper and lower uppers as a surrounding member attached to the head housing 6, lower plates 8 and 9, an air blow mechanism 11 connected to the lower plate 9, and a discharging mechanism 12 connected to the upper plate 8. Is equipped with.

The air blow mechanism 11 comprises an air supply hose 13 connected to the lower plate 9 and a solenoid valve 14 disposed in the middle of the air supply hose 13. The solenoid valve 14 is not shown. Connected to air source. The discharge mechanism 12 includes a discharge pipe 15 connected to the upper plate 8, a discharge hose 16 connected to the discharge pipe 15, and a pail can 17 connected to the other end of the discharge hose 16. A vacuum dust collector 18 connected to the pail can 17 is provided, and a chip collecting part is provided inside the pail can 17. An air passage described later is provided inside the upper and lower plates 8 and 9, and the air blow mechanism 1
The air sent from No. 1 is blown toward the processing part K of the holder 4 described later, and the chips generated in the processing part K are sent out to the pail can 17.

As shown in FIG. 2, a holder 4 is housed inside the head portion housing 6, and the holder 4 is rotatably supported by an outer peripheral bearing 20 and adjacent to the outer peripheral surface thereof. 4h meshing with the gear 21 of
Are formed and are made rotatable by the driving force of the dresser motor 3 transmitted through the gear train. Further, the upper surface and the lower surface of the holder 4 are each provided with a shaping hole 22 engraved in a substantially conical shape. Further, a chip discharge pocket 23 as shown in FIG. 3 is provided so as to penetrate through the upper and lower shaping holes 22, and the chip discharge pocket 2
A blade 24 is screwed to the side surface on one end side of 3. Then, the tips of the upper and lower electrode tips Ta and Tb are inserted into the upper and lower shaping holes 22 and pressed, and the holder 4 is rotated to dress the tip portions of the electrode tips Ta and Tb. The vicinity of the part is the processed part K.

The surrounding member is, as shown in FIG. 2, an upper plate 8 screwed onto the upper surface of the head housing 6,
A lower plate 9 screwed to the lower surface of the head housing 6 and a block member 25 screwed between the upper and lower plates 8 and 9 at the tip of the head housing 6 are provided. As shown in FIGS. 2 and 5, the lower plate 9 is provided with a chip insertion hole 25 that is opened in accordance with the position of the shaping hole 22 of the holder 4, and the lower plate 9 has a mounting surface side, A circular bypass groove 26 that is carved in the same shape as the lower surface of the holder 4 is formed.

An air supply passage 27 is formed inside the lower plate 9, and the air supply passage 27 has an air supply opening 28 that opens toward the outside and the air supply opening 2
The first supply passage 31 extends horizontally from the deep portion of 8 and the second supply passage 32 communicates with the first supply passage 31. The opening of the second supply passage 32 is one of the bypass grooves 26. The holder 4 is opened at a location corresponding to the turning surface of the chip discharge pocket 23.

As shown in FIGS. 2 and 6, the upper plate 8 is provided with a chip insertion hole 33 which is opened in accordance with the position of the shaping hole 22 of the holder 4, and the mounting surface side of the upper plate 8 is provided. A discharge groove 34 that is carved in the same shape as the upper surface of the holder 4 is formed. An air discharge passage 35 communicates with the discharge groove 34.
At the opening of the air discharge passage 35, the discharge pipe 1
A recess 38 for connecting the five is formed.

The block member 25 is arranged between the upper plate 8 and the lower plate 9 and has a recess 39 for connecting the discharge pipe 15. As described above, the discharge hose 16 is connected to the discharge pipe 15.

The operation of the above-described chip discharging device 7 and the chip discharging method will be described. The upper and lower welding electrode tips Ta and Tb are inserted into the upper and lower shaping holes 22 of the holder 4 through the tip insertion holes 25 and 33 of the upper plate 8 and the lower plate 9. Then, from the time when the electrode tips Ta and Tb are inserted into the respective tip insertion holes 25 and 33, the respective tip insertion holes 25 and 33 are closed by the electrode tips Ta and Tb, so that the periphery of the processed portion K is substantially sealed. Be surrounded.

Next, dressing is started by operating the dresser motor 3 while applying a dressing pressure to each electrode tip Ta, Tb. In synchronization with the operation of the dresser motor 3, air is supplied from the air supply hose 13. Be started. When the chip discharge pocket 23 of the holder 4 is located above the second supply path 32, the air blown out from the second supply path 32 is the air.
Pail can 1 with the chips in 3 and the chips adhering to the cutting tool 24.
Flush towards 7. When the chip discharge pocket 23 is not located above the second supply path 32, the second supply path 32
After the air blown from the air flows into the bypass groove 26,
The chips in the chip discharge pocket 23 and the chips adhering to the cutting tool 24 are flushed toward the pail can 17. The air blows through the bypass groove 26, like the oblique electrode and the offset electrode, in the tip insertion hole 3 of the electrode tip.
It is particularly effective when the diameters of 3 and 25 must be increased, and it is possible to prevent the chips from spontaneously dropping from the gap between the electrode of the insertion hole 25 of the lower electrode chip and the insertion hole. At this time, the chips are discharged to the pail can 17 through the air supply hose 1
It is carried out in cooperation with the air pressure supplied from No. 3 and the dust collector 18 for vacuum.

The air sent from the air supply hose 13 is actuated by the solenoid valve 14 as shown in FIG.
As shown in Fig. 4, the intermittent air is designed to be intermittent, and the cost is reduced compared to continuous supply. Until the electrode tips Ta and Tb are removed from the tip insertion holes 25 and 33. Therefore, the timing at which the air is blown toward the processed portion K is while the space around the processed portion K is held in a substantially sealed state by the electrode tips Ta and Tb, and the pail can 1 is efficiently used.
7 can be collected, and the chips do not jump out of the chip insertion holes 25 and 33 to be scattered on the floor surface or the like in the vicinity, and there is no problem that deteriorates the environment.

The upper and lower plates 8 and 9 as a surrounding member are the head portion housing 6 of the tip dresser 1.
Since it is detachably attached, it is possible to prevent the scattering of chips simply by attaching it to the existing tip dresser 1, for example.

Incidentally, in the above embodiment, the pail can 17 is used.
By connecting the discharge hoses 16 of the plurality of chip discharge devices 7 to each other and using the vacuum dust collector 18, the chips are discharged in cooperation with the air pressure sent from the air supply hose 13. However, for example, in the case of the chip discharge device 7 of the single chip dresser 1, the dust suction device 1
8 is not always necessary, and it is sufficient to dispose a chip collecting can at the tip of the discharge hose 16. Further, the air blow may be continuous.

The present invention is not limited to the above embodiment. Those having substantially the same configurations as those described in the claims of the present invention and exhibiting the same operational effects belong to the technical scope of the present invention. For example, the specific configuration of the surrounding member is arbitrary.

[0026]

As described above, the chip discharger for chip dresser according to the present invention is provided with the surrounding member capable of substantially sealingly surrounding the space around the processed part of the chip dresser when performing dressing, Since an air passage is formed in this surrounding member and air is blown toward the processing part and the chips and air are discharged from the air discharge port, it is possible to mix with water, oil, sealers, etc. Even if the cutting amount increases due to the powder or the composition of the work, the chips are reliably discharged, and the chips generated during processing do not scatter to the surroundings. There is no adverse effect. Further, if the surrounding member is detachably attached to the housing of the tip dresser, it can be attached to an existing tip dresser afterwards, which is preferable. If the air is blown intermittently, the chips can be more reliably discharged, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an overall view of a chip discharger for a chip dresser according to the present invention.

FIG. 2 is a sectional view of a main part

FIG. 3 is a plan view of a chip discharging device.

FIG. 4 is a side view of the same.

5 is a sectional view taken along line AA of FIG.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is an operation explanatory view of the air blow.

[Explanation of Codes] 1 ... Chip dresser, 6 ... Head housing, 7 ... Chip discharging device, 8 ... Upper plate, 9 ... Lower plate,
11 ... Air blow mechanism, 12 ... Ejection mechanism, 25 ... Chip insertion hole, 27 ... Air supply path, 28 ... Air supply port, 33 ...
Tip insertion port, 35 ... Air discharge path, K ... Machining section, Ta ...
Welding electrode tip, Tb ... Welding electrode tip.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinji Hoshino             1907 Hirata Town, Suzuka City, Mie Prefecture Honda Motor Co., Ltd.             Suzuka Works Co., Ltd.

Claims (4)

[Claims] 1. A chip discharging device for discharging chips generated when dressing a welding electrode tip, wherein a space around a processed part of a tip dresser is substantially sealed when dressing. An enclosing member that can be surrounded, and an air passage formed in the enclosing member. The air passage includes an air supply path extending from an air supply port toward the processing unit, and an air discharge port from the processing unit. With an air discharge path extending toward, an air blow mechanism is connected to the air supply port, and the air discharge port,
A chip discharging device for a chip dresser, wherein a discharging mechanism for discharging chips and air is connected. 2. A chip discharging device for a chip dresser according to claim 1, wherein the surrounding member is detachably attached to a housing of the chip dresser. 3. A chip discharging method for discharging chips generated when dressing a welding electrode tip, wherein a welding electrode tip is inserted into a tip insertion hole of a surrounding member and the periphery of a processed portion of a tip dresser is improved. The process of enclosing the space part in a substantially sealed manner, and in synchronization with the operation of the dresser motor, air is blown from the air supply port of the air supply path toward the chip discharge pocket having the processing part, and the blown air is blown. And the step of discharging the cutting chips from the air discharge path, and the blowing of the air is completed when the welding electrode tip is separated from the tip insertion hole of the surrounding member, and the cutting powder of the tip dresser is characterized. Ejection method. 4. The chip discharger chip discharge method according to claim 3, wherein the air is blown intermittently when the air supply port of the air supply path and the chip discharge pocket having the processing portion are positionally synchronized. A method for discharging chips from a chip dresser, which is characterized in that it is carried out automatically.