JP3983021B2 - Chip dresser chip discharging apparatus and discharging method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for discharging chips generated when dressing a welding electrode tip.
[0002]
[Prior art]
Conventionally, as an electrode tip dressing apparatus used for spot welding, for example, a technique such as Japanese Patent Laid-Open No. Hei 9-182976 according to the proposal of the present applicant is known. Then, the chips that fall naturally are collected and disposed of later without collecting the chips generated on the spot.
On the other hand, as a technique for confirming the shaping state of a dressed chip, for example, a technique such as Japanese Patent Laid-Open No. 5-245651 is known, and in this technique, the shaping state is confirmed using an optical sensor. At this time, air or the like is blown toward the light emitting element to remove the chips from the optical sensor so that chips or the like do not adhere to the light emitting element of the optical sensor.
[0003]
[Problems to be solved by the invention]
However, in the conventional technique in which chips generated during dressing are collected later without being removed on the spot as in the prior art, for example, the mounting state of the electrode is bad and the cooling water leaks and the electrode is constantly wet. If the amount of rust-preventive oil applied to the workpiece is large, or if the sealing material for the waterproof seal protrudes from the welding point and adheres to the electrode, the chip will be cut if the electrode is dressed. Becomes wet and sticky, and the discharge from the dressing device is significantly reduced.
In addition, in spot welding of surface-treated steel sheets such as galvanized and aluminum plated, wear deterioration due to alloying of copper alloy electrodes is severe, and in the case of high stainless steel materials, the electrode tip diameter is greatly expanded and deformed due to increased pressure. When the electrode is dressed, the amount of cutting increases and chip clogging occurs frequently.
Also, in the case of technology that blows air from the outside, since the periphery of the blade of the tip dresser is sandwiched between the electrodes during dressing of the electrode, it is difficult to reach the air blow, and as with the above, it is possible to reliably discharge chips. It was difficult.
In addition, there is a problem that chips are scattered on the floor surface and the working environment is deteriorated, or chips enter the inside of related devices and the like disposed in the vicinity and cause malfunction.
[0004]
Therefore, the present invention ensures that when dressing the electrode tip for welding, the chips are surely discharged, and the chips are scattered to the surroundings, deteriorating the working environment, and adversely affecting surrounding related devices. The purpose is to prevent.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a chip discharging device for discharging chips generated when dressing a welding electrode tip, and a space around a processing portion of a chip dresser when dressing is performed. An enclosing member that can be enclosed in a substantially sealed manner is formed, and a circular bypass groove and an air passage engraved in the same shape as the bottom surface shape of the holder are formed in the enclosing member, and this air passage is formed from the air supply port. An air supply path composed of a first supply path and a second supply path extending toward the processing portion, an air discharge path extending from the processing portion toward the air discharge port, and an air supply port, An air blow mechanism is connected, a discharge mechanism for discharging chips and air is connected to the air discharge port, and the opening of the second supply path corresponds to the turning surface of the chip discharge pocket of the holder in the bypass groove Open where you want to And, chip discharge pocket when positioned above the second supply path, the air blown out from the second supply path, toward the chips adhering to the chips and the holder of the chip discharge pocket to the discharge mechanism When the chip discharge pocket is not positioned above the second supply path, the air blown out from the second supply path flows into the bypass groove and then adheres to the chip and the holder in the chip discharge pocket. Chips were swept toward the discharge mechanism .
[0006]
By supplying air from the air blow mechanism during dressing processing, air is blown toward the processing portion, and chips and air generated in the processing portion are discharged from the air discharge port and sent to the discharge mechanism. Chips that are sometimes generated can be reliably discharged from the chip discharge pocket of the chip dresser to the outside, and are not scattered to the surroundings, so that the working environment is not deteriorated and peripheral devices are not adversely affected.
Here, the surrounding member may be a member having a tip insertion hole for inserting a welding electrode tip, and when dressing is performed, the welding electrode tip is inserted into the tip insertion hole to process the surrounding member. You may make it the form where the part periphery is enclosed in a sealing form.
[0007]
In the present invention, the surrounding member is detachable from the housing of the chip dresser.
If the chip dresser housing is detachable as described above, it can be attached later to an existing chip dresser, for example, which is suitable for widening the application range.
[0008]
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 so that the space around the processing portion of the tip dresser is almost sealed. After being surrounded by the shape, in synchronization with the operation of the dresser motor, air was blown from the air supply port of the air supply path directly or through the bypass groove toward the chip discharge pocket having the processed portion. The air and chips were discharged from the air discharge path, and the blowing of the air was finished when the welding electrode tip was detached from the tip insertion hole of the surrounding member.
[0009]
In this way, by surrounding the space around the processing portion with the surrounding member and the welding electrode tip in a substantially sealed state, and blowing air in this state, chips generated during processing can be efficiently discharged. In addition, it is possible to prevent the problem that chips are scattered around.
[0010]
In the present invention, air is blown intermittently onto the chip discharge pocket, and at other times, a negative air pressure is applied to the chip discharge pocket.
In this way, if the chips are discharged by intermittent air blow, the chips are stirred in the chip discharge pocket by turning on / off the air blow, and the discharge performance is improved. In other cases, the negative pressure of air is applied to the chip discharge pocket, so that the chip does not fall from the gap between the welding electrode tip and the tip insertion hole.
[0011]
DETAILED DESCRIPTION OF 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 dresser chip discharging apparatus according to the present invention, FIG. 2 is a sectional view of the main part, FIG. 3 is a plan view of the chip discharging apparatus, FIG. FIG. 6 is a sectional view taken along line AA in FIG. 2, FIG. 6 is a sectional view taken along line BB in FIG. 2, and FIG.
[0012]
The chip dresser chip discharging apparatus according to the present invention is capable of preventing scattering of chips generated during dressing processing and eliminating adverse effects on the working environment and peripheral devices, etc. In the embodiment, since it is detachable from the housing of an existing chip dresser, it is configured as a device having a wide application range, such as being applicable to an existing dressing machine.
[0013]
That is, as shown in FIG. 1, the tip dresser 1 is mounted on the base 2 so that the upper and lower welding electrode tips Ta and Tb can be dressed at the same time, and the dresser motor 3 and the dresser motor 3 The present invention includes a gear train housing 5 that houses a gear train for transmitting rotation to a holder 4 (FIG. 2), which will be described later, and a head housing 6 that houses a holder 4 having a dressing blade. Includes a pair of upper and lower upper members, lower plates 8 and 9, which are attached to the head housing 6, an air blow mechanism 11 connected to the lower plate 9, and a discharge mechanism 12 connected to the upper plate 8. Yes.
[0014]
The air blow mechanism 11 includes 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 serves as an air source (not shown). It is connected.
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, a pail rod 17 connected to the other end of the discharge hose 16, A vacuum dust absorber 18 connected to the pail rod 17 is provided, and a chip reservoir is provided inside the pail rod 17.
An air passage which will be described later is provided inside the upper and lower plates 8 and 9, and air sent from the air blow mechanism 11 is blown toward a processing portion K of the holder 4 which will be described later. The generated chips are sent out to the pail basket 17.
[0015]
As shown in FIG. 2, a holder 4 is accommodated in the head housing 6, and the holder 4 is rotatably supported by an outer peripheral bearing 20. 4h is formed so as to be rotatable by the driving force of the dresser motor 3 transmitted through the gear train. The upper and lower surfaces of the holder 4 are provided with shaping holes 22 that are carved into a substantially conical shape.
Further, a chip discharge pocket 23 as shown in FIG. 3 is provided in a form penetrating the upper and lower shaping holes 22, and a cutting tool 24 is screwed to one side surface of the chip discharge pocket 23.
Then, the tips of the upper and lower electrode tips Ta and Tb are inserted into the upper and lower shaping holes 22 and pressurized, and the holder 4 is rotated to dress the tips of the electrode tips Ta and Tb. The vicinity of the part is a processed part K.
[0016]
As shown in FIG. 2, the surrounding member includes an upper plate 8 that is screwed to the upper surface of the head portion housing 6, a lower plate 9 that is screwed to the lower surface of the head portion housing 6, and a distal end portion of the head portion housing 6. And a block member 25 screwed between the upper and lower plates 8 and 9. 2 and 5, the lower plate 9 includes a chip insertion hole 25 that is opened in accordance with the position of the shaping hole 22 of the holder 4, and on the mounting surface side of the lower plate 9, A circular bypass groove 26 engraved in the same shape as the bottom surface of the holder 4 is formed.
[0017]
An air supply path 27 is formed inside the lower plate 9. The air supply path 27 extends horizontally from an air supply port 28 that opens to the outside and a deep portion of the air supply port 28. The first supply path 31 and the second supply path 32 communicating with the first supply path 31, and the opening of the second supply path 32 is the chip discharge pocket of the holder 4 in the bypass groove 26. It opens in the location corresponding to 23 turning surfaces.
[0018]
As shown in FIGS. 2 and 6, the upper plate 8 includes a chip insertion hole 33 that is opened in accordance with the position of the shaping hole 22 of the holder 4, and the holder 4 on the attachment surface side of the upper plate 8. A discharge groove 34 engraved in the same shape as the upper surface shape is formed. An air discharge path 35 communicates with the discharge groove 34. A recess 38 for connecting the discharge pipe 15 is formed in the opening of the air discharge path 35.
[0019]
The block member 25 is disposed 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.
[0020]
The operation of the chip discharge device 7 and the chip discharge 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 chip insertion holes 25 and 33 of the upper plate 8 and the lower plate 9.
From the point of time when the electrode tips Ta and Tb are inserted into the chip insertion holes 25 and 33, the chip insertion holes 25 and 33 are closed by the electrode chips Ta and Tb, and the periphery of the processing portion K is almost sealed. It will be surrounded.
[0021]
Next, dressing is started by operating the dresser motor 3 while applying a dressing pressure to each of the electrode tips Ta and Tb, but supply of air from the air supply hose 13 is started in synchronization with the operation of the dresser motor 3. .
Then, when the chip discharge pocket 23 of the holder 4 is positioned above the second supply path 32, the air blown out from the second supply path 32 is converted into the chips in the chip discharge pocket 23, and The chips adhering to the blade 24 are pushed away toward the pail rod 17.
In addition, when the chip discharge pocket 23 is not positioned above the second supply path 32, the air blown out from the second supply path 32 flows into the bypass groove 26, and then the chips in the chip discharge pocket 23, Then, the chips adhering to the blade 24 are pushed away toward the pail rod 17.
The air blow through the bypass groove 26 is particularly effective when the diameters of the chip insertion holes 33 and 25 of the electrode tip have to be increased as in the case of an oblique electrode or an offset electrode. It is possible to prevent chips from spontaneously falling from the gap between the electrode of the insertion hole 25 and the insertion hole.
At this time, the discharge of the chips to the pail rod 17 is performed by the joint work of the supply air pressure from the air supply hose 13 and the vacuum dust absorber 18.
[0022]
Further, the air fed from the air supply hose 13 is intermittently intermittent air as shown in FIG. 7 by the operation of the solenoid valve 14, which is less expensive than the continuous supply. The air blowing is continued until the dress pressurization is in a half-open state, and is finished by the time when the electrode tips Ta and Tb are detached from the tip insertion holes 25 and 33. Has been.
For this reason, the timing at which air is blown toward the processing portion K is while the space around the processing portion K is held in a substantially sealed state by the electrode tips Ta and Tb, and is efficiently collected in the pail rod 17. In addition, it does not jump out of the chip insertion holes 25 and 33 and scatter on the surrounding floor surface, and there is no problem that deteriorates the environment.
[0023]
Further, since the upper and lower plates 8 and 9 as surrounding members are detachably attached to the head portion housing 6 of the chip dresser 1, it is possible to prevent chips from being scattered simply by being attached to the existing chip dresser 1, for example.
[0024]
Incidentally, in the above embodiment, the air pressure fed from the air supply hose 13 by connecting the discharge hoses 16 of the plurality of chip discharge devices 7 to the pail rod 17 and using the vacuum dust absorber 18 is used. For example, in the case of the chip discharging device 7 of the single chip dresser 1, the dust sucker 18 is not necessarily required, and the chip collecting rod is disposed at the tip of the discharge hose 16. It is only necessary to dispose.
The air blow may be continuous.
[0025]
The present invention is not limited to the above embodiment. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.
For example, the specific configuration of the surrounding member is arbitrary.
[0026]
【The invention's effect】
As described above, the chip dresser chip discharging apparatus according to the present invention is provided with the surrounding member that can surround the space around the processing portion of the chip dresser in a sealing manner when performing dressing, and the surrounding member is provided with air. Since air is blown toward the processing part by forming a passage and chips and air are discharged from the air discharge port, it is mixed with water, oil, sealer, etc. Even when the cutting amount is increased due to the composition, the chips are reliably discharged, and the chips generated during the processing are not scattered around, so that there is no adverse effect on the working environment and peripheral equipment.
Further, when the chip discharge pocket is positioned above the second supply path, the air blown from the second supply path directs the chip in the chip discharge pocket and the chips adhering to the holder to the discharge mechanism. When the chip discharge pocket is not positioned above the second supply path, the air blown out from the second supply path flows into the bypass groove and then adheres to the chip and the holder in the chip discharge pocket. since the chips to sweep away toward the discharge mechanism, air blow through the bypass groove, as in the oblique electrodes or offset electrodes, when the diameter of the tip inserting holes of the electrode tip increases inevitably, particularly effective Yes, it is possible to prevent chips from spontaneously dropping from the gap between the electrode and the insertion hole of the lower electrode tip.
Further, if the surrounding member is detachably attached to the housing of the chip dresser, it can be suitably attached to an existing chip dresser afterwards, for example.
If air is blown intermittently, the chips can be discharged more reliably, and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a general view of a chip dresser chip discharging apparatus according to the present invention. FIG. 2 is a cross-sectional view of a main part. FIG. 3 is a plan view of a chip discharging apparatus. Fig. 6 is a cross-sectional view taken along line AA of Fig. 6; Fig. 7 is a cross-sectional view taken along line BB of Fig. 2;
DESCRIPTION OF SYMBOLS 1 ... Chip dresser, 6 ... Head part housing, 7 ... Chip discharge apparatus, 8 ... Upper plate, 9 ... Lower plate, 11 ... Air blow mechanism, 12 ... Discharge mechanism, 25 ... Chip insertion hole, 27 ... Air supply path, 28 ... Air supply port, 33 ... Chip insertion port, 35 ... Air discharge path, K ... Processed portion, Ta ... Welding electrode tip, Tb ... Welding electrode tip.

Claims (4)

A chip discharging device that discharges chips generated when dressing an electrode tip for welding, and can surround a space around a processing portion of a chip dresser in a substantially sealed manner when performing dressing. And a circular bypass groove and an air passage carved in the same shape as the lower surface shape of the holder formed on the surrounding member, and the air passage extends from the air supply port toward the processing portion. The air supply path includes an air supply path including a first supply path and a second supply path, and an air discharge path extending from the processed portion toward the air discharge port. An air blow mechanism is connected to the air supply port, and the air A discharge mechanism for discharging chips and air is connected to the discharge port, and the opening of the second supply path is opened at a location corresponding to the turning surface of the chip discharge pocket of the holder in the bypass groove. and, When the chip discharge pocket is located above the second supply path, the air blown out from the second supply path causes the chips in the chip discharge pocket and the chips attached to the holder to When the chip discharge pocket is pushed toward the discharge mechanism and the chip discharge pocket is not positioned above the second supply path, the air discharged from the second supply path flows into the bypass groove, and then the chip discharge pocket A chip dresser chip discharging apparatus characterized in that chip chips adhering to the holder and the chip adhering to the holder are swept toward the discharging mechanism .  2. The chip dresser chip discharging apparatus according to claim 1, wherein the surrounding member is detachably attached to a housing of the chip dresser.  A chip discharging method for discharging chips generated when dressing an electrode tip for welding, and the space around the processing portion of the tip dresser is almost sealed by inserting the electrode tip for welding into the tip insertion hole of the surrounding member. The air is blown from the air supply port of the air supply path directly or through the bypass groove toward the chip discharge pocket having the processed portion in synchronization with the operation of the dresser motor. A step of discharging the air and chips from the air discharge passage, and the blowing of the air is terminated when the welding electrode tip is detached from the tip insertion hole of the surrounding member. Chip discharge method.  4. The chip dresser chip discharging method according to claim 3, wherein the air blowing is intermittently performed when a chip discharging pocket having an air supply port of the air supply path and a processing portion is synchronized in position. A chip dresser chip discharging method characterized by the above.

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