JP3110698B2 - Tip dresser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip dresser for correcting, shaping, and regenerating (dressing) an electrode tip (including a cap tip attached to the tip of a shank) used in an electric spot welding machine or the like. More particularly, the present invention relates to a tip dresser that improves the operability and cutting performance of a tip cutter against an electrode tip and improves workability during operation.

[0002]

2. Description of the Related Art Conventionally, an electrode chip used for electric spot welding such as resistance welding is subject to pick-up, wear due to thermal softening, dent deformation and damage as welding is repeated. For these reasons, the current density at the time of welding has changed due to reasons such as an increase in the nugget diameter and variations, and welding defects have occurred.

[0003] Therefore, it is necessary to perform a cutting operation on the peripheral surface of the tip of the electrode tip at an appropriate number of times of welding, to remove a pickup attached to the electrode tip, or to modify the diameter of the nugget to dress the tip surface. As an example of the dressing work, as shown in FIG. 27, a state where it is attached to the spot welding machine a (FIG. 27 (b)) or a state where it is attached to the tip of the shank f, f ′ (FIG. 27 (a) The operator performs a cutting process on the tip surface of the electrode tip while manually pressing the electrode tip b, b ') by using a hand-held tip dresser d (dressing tool) equipped with a tip cutter c. I was

In the working mode, a pair of electrode tips b,
To one of b ′, the tip cutter c is addressed, the tip dresser d is moved up or down to press the tip cutter c against the electrode tip b, and the operating lever e of the tip dresser d is operated, The electrode tip b was cut by the rotating tip cutter c.

Due to the manual (hand-held) operation, the pressing force of the tip cutter c against the electrode tip b is insufficient,
The pressing direction of the tip cutter c and the center of the electrode tip b of the work material are slightly displaced and do not coincide with each other, a desired cutting amount and shape cannot be obtained, and it is difficult to restore the electrode tip b to a normal shape. Had.

[0006] In recent years, the material of the electrode tips b and b ', which are the work materials, has undergone a great change. That is, the material to be welded has been greatly increased from only iron plates and ordinary steel plates to plated steel plates. The current density must be strictly controlled accordingly, and as a countermeasure, the material of the electrode chips b and b 'is also used, from chromium copper to beryllium copper and alumina dispersed copper. Because of the change and diversification, the cutting work for pick-up in which some parts are sticky or hard, or the very hard compound of the electrode tips b and b 'and the plated steel sheet are attached, An increase in the pressing force of the cutter c has been desired.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a tip dresser which increases the pressing force and improves the consistency of the pressing direction, thereby improving the operability and the cutting performance and, at the same time, improving the workability. Is to be provided.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem that the pressing force of a tip cutter against an electrode tip is insufficient, and an interlocking rod is attached to a lower surface of a tip portion of a dresser body. By attaching a hook plate that can be freely fitted to the mounting shaft of the shank at the tip of the shank, or by arranging a pressing substrate or hook plate that is slidable by the action of the interlocking rod on the processing axis, the hook plate is used as a fulcrum. The dresser is relatively moved to the tip, or one of the opposing electrode tips is used as a fulcrum, and the tip dresser is relatively moved to the opposite electrode tip to increase the pressing force by mechanical movement having the fulcrum. .

In view of the problem of lack of consistency between the center of the electrode tip and the pressing direction of the tip cutter, when the pressing force is increased, the pressing substrate or hook plate that slides in the same direction as the processing axis moves in parallel. By
The above problem has been solved by moving the tip dresser in the same direction as the center of the electrode tip.

Further, in the above means, the operating part and the operating part of the tip cutter are required respectively, and in view of the problem that the workability is slightly low, the operating lever of the operating part and the starting lever of the tip cutter are swung on the same plane. The above problem has been solved by arranging the operating lever that is operated to swing and swinging the starting lever, so that even with a large number of welding guns, one-handed operation is possible. is there.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As a first embodiment of the present invention, a type in which a hook plate 37 is swung is shown in FIGS.
As a second embodiment, a type in which the hook plate 37 is moved up and down is shown in FIG. 10 and thereafter. As a third embodiment, a type in which the receiving seat 54 is moved up and down is shown in FIG. FIGS. 12 and 13 show a type in which the wear amount detecting means 90 is added in the embodiment, and FIG. 16 shows a type in which the adjustment plate 49 is added in the second embodiment. This is shown in FIG.

In FIG. 1, reference numeral 1 denotes a dresser body for dressing (correcting) tip portions F1 and F2 such as tip peripheral surfaces and tip central portions of electrode tips M1 and M2 which can be vertically opposed by swinging or sliding.

One type of the electrode tips M1 and M2 to be dressed by the dresser body 1 according to the present invention is a welding gun 25 of a welding machine 24, as shown in the first and second embodiments in FIG.
This is referred to as a cap tip attached to the tip of the shank 23, 23a at 25a, and the shank 23, 23a
The electrode tips M1 and M2 are fitted to the relatively thin mounting shaft 26, and the portion where the mounting shaft 26 exists in the gap between the shanks 23 and 23a and the electrode chips M1 and M2 forms a hooking recess 27 ( 8, 14, and 16).

As a third embodiment, FIGS.
As shown in FIG. 2, the dresser body 1 dresses (corrects) the vertically opposed electrode tips M1 and M2 (objects to be processed and non-processed, which will be described later).

A through hole 3 is formed in the dresser body 1 in the vicinity of the distal end portion 2 in the thickness direction thereof, and a substantially cylindrical cutter case 4 is rotatably inserted into the through hole 3. A tip cutter 5 for supporting and dressing the electrode tips M1 and M2 to be processed is fitted and fixed in the cutter case 4 (see FIGS. 10 and 11).

As shown in FIG. 6, an interlocking member 80 is provided on the outer periphery of the cutter case 4 and in the distal end portion 2.
The cutter case 4 is driven to rotate by a pneumatic motor 100 built in the base portion 6 of the dresser body 1,
As shown in FIGS. 2 and 6, a power source connecting portion 8 is provided on a base rear surface portion 7 of the base portion 6, and a protruding switch rod 10 is provided on a base peripheral surface portion 9 so as to be able to be retracted. .

An operating section X is provided on the rear half 6a of the base 6 of the dresser body 1, and a transmitting section Y is provided on the intermediate section 6b.
An operating portion Z is provided at the distal end portion 2, and by operating the operating portion X, the motor 100 built in the base portion 6 is driven, and the operating portion Z is operated to operate the tip cutter 5 and the electrode tips M 1, 2.
M2 is pressed.

Although the drawing shows a pneumatic motor, it may be a driving source other than an electric motor, and compressed air is supplied from the connecting portion 8.
When the motor 100 is driven, the air is exhausted from an exhaust portion 101 having an exhaust hole obliquely arranged forward.

As an example of the mounting state of the switch rod 10, as shown in FIGS. 6 and 7, valve cases 70 and 70a are mounted in the diameter direction of the base 6 and the valve cases 70 and 70a are mounted.
a, slide the valve stem 71 freely into the
A valve body 73 which can be seated on a valve seat 72 provided at an end of the valve case 71 is provided on a valve rod 71 protruding into a valve case 70a, and a spring 74 for urging the valve rod 71 in a seating direction is provided in the valve case. 70a
It is provided within.

The distal end portion 71a of the valve stem 71 projects outside the base peripheral surface portion 9 to form a switch rod 10, and the intermediate portion 71b of the valve stem 71 has a diameter smaller than the inner diameter of the valve cases 70 and 70a. Thus, a flow path 75 is formed in the valve cases 70 and 70a, and the base end 71c of the valve rod 71 has a diameter slightly smaller than the inner diameter of the valve cases 70 and 70a. The starting passages 76 are formed at small intervals in the cases 70 and 70a.

In the valve element 73 seated on the valve seat 72,
An O-ring 77 is provided on the valve seat 73 side of the valve body 73, so that the O-ring 77 can be seated on the valve seat 72.

The supply passage 78 communicated with the connection portion 8 provided on the rear end portion 7 of the base end of the base portion 6 communicates with the inside of the valve case 70a, and from the passage 75 to the drive source passage 79 of the motor. They are communicating.

As shown in FIGS. 2, 6 and 7, in the operating portion X, a starting lever 11 is rotatably connected to one end of the base peripheral surface 9 of the dresser body 1 via a pin 12. Attachment, the free end side of the starting lever 11 is extended to the other end side of the base peripheral surface portion 9, and the tip of the switch rod 10 which is pressed and protruded by the spring 74 on the inner curved side of the starting lever 11. To
It is freely pressable (in the drawing, it is in a contact state, but there is no pressing state on the switch rod 10 and a state where a slight gap is provided is preferable).

Further, by the configuration of the drive switch section of the motor 100, the operation lever 33 of the operation section X (to be able to swing on the same plane as the starting lever 11) is operated by the swing operation of the operation lever 33 to be described later. By pressing the starting lever 11, the switch rod 10 (the distal end of the valve rod 71
71a) starts moving inward.

Then, the valve body 73 of the valve rod 71 starts to be detached from the valve seat 72, and compressed air flows into the starting flow path 76 between the valve cases 70 and 70a and the base end 71c of the valve rod 71. Compressed air is supplied to the motor 100 via the drive flow path 75 and the drive source flow path 79, and the motor 100 starts and rotates at a low speed.

Thereafter, when the valve body 73 separates from the valve seat 72 and the base end 71c of the valve stem 71 passes through the valve seat 72, the valve stem 71
A flow path 75 is generated between the intermediate portion 71b and the valve cases 70 and 70a, the supply amount of compressed air increases, and the motor 100 rotates at high speed.

The overall shape of the tip cutter 5 is as follows.
For example, as shown in FIG. 10 and FIG.
7, 17a are integrally formed, and various shapes such as a semicircle shape, a V shape, a dish shape, a prism shape, a truncated cone shape, etc., matching with the tip of the lower electrode tip M1 in the figure are formed on the processing side end face. A recess 20 is formed, and fitting projections 21, 21a are provided outside the first and second cutter blades 17, 17a.

The mounting recesses 22, 22a of the cutter case 4 rotatably provided at the tip 2 of the dresser body 1.
Into the fitting projections 21 and 21a of the tip cutter 5,
A tip cutter 5 is detachably attached to the cutter case 4.

With this configuration, when the tip cutter 5 is attached to the cutter case 4, the electrode tips M1,
The tip portions F1 and F2 of M2 can be freely fitted into the concave portions 20 of the tip cutter 5, and the inner surface of the cutter case 4 or the inner surface of the tip cutter 5 partially serves as a guide wall for the electrode tips M1 and M2.

As shown in FIGS. 2, 3, and 6, a second configuration (operating lever 33) for followingly operating the starting lever 11 in the operating section X includes a lower surface side of the distal end portion 2 of the dresser body 1. In addition, a gate-shaped mounting board 30 is mounted so as to extend to an intermediate position of the base portion 6, and a pivot 32 is rotatably disposed on the vertical plates 31 and 31 a of the mounting board 30. An intermediate portion of an operation lever 33 corresponding to a part of the operation portion X having a lever action is fixed to 32.

The distal end side of the operating lever 33 is substantially equivalent to the base end side of the base member 6 and the operating lever 33 is provided between the pivoting shaft 32 and the distal end of the operating lever 33 outside the starting lever 11.
The tip of the starting lever 11 and the operation lever 33 are swingable on the same plane, and are in a non-contact state at a predetermined interval.

The mounting directions of the starting lever 11 and the operating lever 33 are opposite, but the starting lever 11 and the operating lever 33 are not mounted.
Is in a non-contact state, but is not limited to these states.
What is necessary is just to be able to operate the starting lever 11 by operating the operation lever 33.

Next, the transmitting portion Y of the operating force of the operating lever 33 will be described. As shown in FIG. 6, a swinging pivot 35 is rotatably provided on the vertical plates 31 and 31a on the tip side of the mounting board 30. An interlocking rod 36 is attached to the swinging pivot 35, and the base end of the interlocking rod 36 is arranged on the lower surface side of the base end of the operation lever 33, and the distal end of the interlocking rod 36 is connected to the lower surface side of the distal end portion 2 of the dresser body 1. At the front of the tip cutter 5 so that the tip acts on the action portion Z.

The operating lever 33 and the interlocking rod 36 are used to control the operating section X.
In the illustrated example, the length ratio of the operating lever 33 in both directions from the pivot shaft 32 is about four times the tip side of the operating lever 33, and the interlocking lever is provided. The length ratio of the swinging shaft 35 in both directions from the swinging pivot 35 is substantially the same, and a lever action is given to the interlocking rod 36 of the operation portion X.

Further, spring seats 46 and 46a are provided on the upper surface of the horizontal plate 31b of the mounting board 30 and the interlocking rod 36 which are mounted on the distal end portion 2 of the dresser body 1 on the distal end side of the pivot 35. With the spring 47 interposed, the distal end of the interlocking rod 36 is urged in a direction away from the processing surface side of the distal end portion 2 of the dresser body 1, and the base end of the interlocking rod 36 raises the base end of the operation lever 33 upward (dresser (The main body 1 side), and the operation lever 33 of the operation section X is in a state where it can be gripped.

Next, the action portion Z for pressing the electrode tips M1 and M2 and the tip cutter 5 will be described. In the case of the first embodiment, FIGS. 2, 3, 4, 6, 8, and 9 are shown. Similarly, the hook plate 37 is attached to the tip of the interlocking rod 36 in the direction of the processing axis C, and
A hook-shaped groove 38 is provided, and U-shaped plate portions of the hook plates 37 on both sides thereof are formed as receiving portions 39 and 39a. In the illustrated embodiment, a step is provided inside the hook groove 38. And thin plate-shaped receiving portions 39 and 39a are separately provided.

The hook groove of the hook plate 37
Numeral 38 designates that it can be freely fitted to the mounting shaft 26 of the shank 23, 23a for mounting the electrode tips M1, M2 of the cap chips,
The receiving portions 39 and 39a can freely support the lower ends of the electrode tips M1 and M2.

The wear amount detecting means 90 is different from that of the first embodiment.
Is added, as shown in FIGS. 12 and 13,
The wear amount detecting means 90 of the electrode tips M1 and M2 is attached to an appropriate portion of the dresser main body 1, and the wear amount detecting means 90 is provided.
The following is an example of the specific configuration of the sensor, but it is detected by the amount of movement of the transmitting part Y or the acting part Z such as the hook plate 37 or its mounting member (the interlocking rod 36 or the supporting substrate 40 and the pressing substrate 41 described later). It is possible.

For example, an insertion hole 91a is formed in a detection board 91 provided on one side of the hook plate 37, and the insertion hole 91a is formed.
A contact terminal rod 92 is slidably mounted on a, and a stopper 93 is mounted on the tip of the contact terminal rod 92, and a double nut type nut 94 is mounted on the lower end thread portion of the contact terminal rod 92.

The intermediate portion of the contact terminal rod 92 and the stopper
A case 95 is mounted so as to surround the 93, and the tip of the contact terminal rod 92 is slidably disposed in an insertion hole 95a provided at the top of the case 95, and the contact terminal is provided between the detection board 91 and the stopper 93. A spring 96 is wound around a rod 92.

At the tip 2 of the dresser main body 1, a contact board 97 is provided at a position facing the contact terminal rod 92, and a power supply 98 and a diode are provided at a position close to the contact board 97.
Attach display means 99 such as lamps, contact terminal rod 92, power supply 98
And display means 99 are connected.

As a second embodiment, FIGS.
As shown in FIG. 5, the structure up to the arrangement of the interlocking rod 36 is the same as that of the first embodiment, and the differences from the second embodiment will be described below. The hook plate 37 is attached to the tip of 36.
In the dresser body 1 of the embodiment, the pressing portion 48 serving as a driving source of the parallel moving member to which the hook plate 37 is attached is connected to the interlocking rod 36.
It is attached to the tip of.

A support substrate 40 is arranged on the upper surface side (non-processed surface side) of the tip portion 2 of the dresser main body 1 and before the through hole 3, and the through hole is formed on the lower surface side (processed surface side) of the tip portion 2. The pressing substrate 41 is arranged in front of the front end 3, and the upper and lower supporting substrates 40 and the pressing substrate 41 arranged in parallel are connected to each other by four slide rods 42, 42 a, and bolts 43, 43 a. ing.

Further, holding bodies 44 and 44a are provided on the outer side of the distal end portion 2, and the supporting board 40 and the pressing board 41 are inserted into through holes 45 and 45a formed in the holding bodies 44 and 44a in the same direction as the processing axis C. Are inserted through the slide rods 42, 42a.
Uneven spring seats 46 and 46a are provided at positions opposing the 44a and the lower pressing substrate 41, and a spring 47 having a pressing action is provided so that the supporting substrate 40 is seated on the upper surface (non-processed surface side) of the distal end portion 2. It is energizing like.

With such a structure having the parallel moving member, the support substrate 40 disposed on the upper surface side of the distal end portion 2 comes into surface contact, and the pressing substrate disposed on the lower surface side of the distal end portion 2 is brought into contact.
41 is in the separated state, and pushes down the pressing portion 48 of the interlocking rod 36 on the lower surface side of the pressing substrate 41, and the base end of the interlocking rod 36 is
Is pressed upward, and the operation lever 33 is in a state where it can be gripped.

Then, as in the first embodiment, a hook plate 37 having a locking groove 38 and receiving portions 39, 39a formed at the tip of a pressing substrate 41 movable in the same direction as the processing axis C.
Is installed.

In both the first and second embodiments, the hook plate 37 is integrally attached to the tip of the interlocking rod 36 or the pressing substrate 41. However, a separate member is attached to the interlocking rod 36 or the pressing substrate 41. The hook plate 37 may be detachably attached.

Also, as shown in FIG.
In order to adjust the distance between the processing surface side and the hook plate 37, the hook plate 37 may be attached to the lower surface side of the pressing substrate 41 with the adjustment plate 49 interposed therebetween, and such a configuration is that of the first embodiment. In other words, the hook plate 37 can be attached to the interlocking rod 36 with the adjustment plate 49 interposed.

The wear amount detecting means shown in FIGS.
90 can be applied to the second embodiment.

As a third embodiment, as shown in FIG. 17 and subsequent figures, the arrangement of the support substrate 40 and the pressing substrate 41 is the same as that of the second embodiment.
The structure is the same as that of the second embodiment, and differences from the second embodiment will be described below.

In the dresser body 1 of the second embodiment, the hook plate 37 is attached to the pressing board 41. However, in the dresser body 1 of the third embodiment, nothing is attached to the pressing board 41. In the example dresser body 1, the support substrate 40
In the dresser body 1 of the third embodiment, the support substrate 40 is extended along the processing straight line C, and the receiving seat 54 to be processed is mounted.

Then, as shown in FIGS. 18 to 21, the adjustment lever 50 is pivoted on the upper surface (non-processed surface side) of the support substrate 40.
At the base end of the adjustment lever 50, an operation plate 52
Attach the distance adjustment body 53 to the tip of the adjustment lever 50.
Are mounted, for example, by a screw-type so as to be replaceable.

A receiving seat 54 for the tip F2 of the upper electrode chip M2, which is not to be processed, is formed on the upper surface of the gap adjuster 53, and the lower surface of the gap adjuster 53 is close to the upper surface of the support substrate 40. Has formed.

Then, the upper surface (non-processed surface side) of the support substrate 40
The positioning recesses 55 and 55a are provided at the processing position and the retreat position on the processing axis C, respectively. On the other hand, a spring receiving hole 56 is provided on the lower surface (the contact surface side with the support substrate 40) of the spacing adjuster 53, and A positioning ball 58 is disposed on the lower surface 57 and the lower surface thereof.
53 of the positioning ball 58
5 and 55a so as to position the distance adjusting body 53.

The distance adjusting member 53 attached to the adjusting lever 50
Is projected to the lower end surface of the support substrate 40, but the present invention is not limited to this type, and if the positioning ball 58 is aligned with the center position of the receiving seat 54 of the interval adjusting body 53, the positioning ball 58
May be attached to the lower surface side of the support substrate 40.

Next, the operation of the dresser of the first embodiment will be described.
As shown in FIG. 1, the lower electrode tip M1 at the tip of the shank 23, 23a of the welding gun 25, 25a below the welding machine 24 is held below the tip 2 of the dresser body 1 as shown in FIG. The hook plate 37 provided is brought close to the hook plate 37.

The type of the welding machine 24 is as shown in FIG.
One of the welding guns 25 and 25a is not limited to the swing type, and may be an up-down pressing type as shown in FIG. 17, that is, the shank 23 of the welding gun 25 or 25a of the welding machine 24.
23a, an electrode tip M called a cap tip
1, the tip dresser according to the present invention can be used as long as it has M2 attached.

In the state shown in FIG. 8, the hooking groove 38 of the hook plate 37 of the dresser body 1 and the receiving portion 3 are inserted into the hooking concave portion 27 between the shank 23 and the electrode tip M1.
When the inserts 9 and 39a are inserted from the horizontal direction, the engaging groove 38 fits into the mounting shaft 26 in the engaging concave portion 27, and the electrode tip M
The lower end (base end) of 1 is located on the receiving portions 39 and 39a, and at the same time, the machining axis C of the electrode tip M1 and the tip cutter 5 substantially coincide.

Next, the operating lever 33 of the operating portion X disposed on the base portion 6 of the dresser body 1 is gripped and operated, whereby the operating lever 33 and the interlocking rod 36 swing, and the spring force of the spring 47 is generated by leverage. The hook plate 37 at the tip of the interlocking rod 36 starts swinging upward in a slightly arcuate state generally along the direction of the processing axis C.

Then, by continuing the gripping operation of the operation lever 33, the operation lever 33 starts pressing the starting lever 11, and the motor 100, the cutter case 4 and the tip cutter 5 are rotated at a low speed.

Then, by continuing the gripping operation of the operating lever 33, the concave portion 20 of the tip cutter 5 is covered with the electrode tip M1, and as shown in FIG. With the cutter 5 in the mounted state,
Hook concave portion 27 in electrode tip M2 of hook plate 37
The tip cutter 5 of the dresser body 1 is pressed by the electrode tip M1 by maintaining the downward pressing of the tip cutter 5 with the fulcrum as a fulcrum.

As described above, when the tip cutter 5 is pressed against the electrode tip M1, the starting lever 11 is also operated by the operating lever.
Since the tip cutter 5 is pressed, the tip cutter 5 rotates at a high speed, and the tip cutter 5 that rotates in contact with the tip cutter 5 cuts and corrects the tip peripheral surface of the lower electrode tip M1 and the tip F1 at the tip center.

In the dressing operation of the electrode tips M1 and M2, the wear amount detecting means 90 shown in FIGS.
The operation of the electrode tips M1, M
2 is a welding work and a dressing work, the tip portions F1 and F2 are gradually worn or cut and shortened,
Therefore, the electrode chips M1 and M2 have a service life.

Therefore, the reduced electrode tips M1, M2
When the electrode tips M1 and M2 have exceeded the service life, the contact terminal rods 92 attached to the hook plates 37 are attached to the dresser body 1 when the electrode chips M1 and M2 have exceeded the service life. The display means 99 is turned on when it comes into contact with the attached contact board 97.

The position of the tip of the contact terminal rod 92 from the hook plate 37 is adjusted and fixed by adjusting the nut 94 attached to the contact terminal rod 92, and the contact board of the dresser body 1 is fixed.
When the contact terminal rod 92 contacts the
Contracts.

Next, the operation of the dresser of the second embodiment will be described. When the operation lever 33 of the operation section X is operated in the same manner as in the first embodiment, as shown in FIGS. The pressing portion 48 at the distal end is provided with a pressing substrate 41 disposed on the lower surface of the distal end portion 2 of the dresser main body 1 by a spring 47.
When the operating lever 33 presses the starting lever 11, the motor 100 is started and gradually shifts to high-speed rotation.

The upward movement of the pressing substrate 41 causes the pressing substrate 41
The support substrate 40 disposed on the upper surface side of the distal end portion 2 connected to the slide rods 42, 42a... Moves upward in the direction orthogonal to the pressing substrate 41 (substantially the same direction as the processing axis C (substantially parallel direction)). Then, the concave portions 20 of the tip cutter 5 are attached to the electrode tips M1 and M2.
In a crowned state, and thereafter, as in the first embodiment,
The tip F1 of the electrode tip M1 is dressed.

It should be noted that the direction in which the tip cutter 5 is pressed against the electrode tip M1 and the set state thereof are additionally described. When the tip F1 of the lower electrode tip M1 fits into the recess 20 of the tip cutter 5, FIG. As shown, a part of the lower circumferential portion of the lower end of the cutter case 4 and a shaft portion below the front end portion F1 of the electrode tip M1 have substantially the same shape and serve as a guide for matching the machining axes C of the two.
The second and third embodiments are common. ).

By the above-mentioned axis matching operation, in the case of the second embodiment, when the support substrate 40 is moved from the state of FIG. 14 (at the time of setting) to the state of FIG. 15 (at the time of processing), the same direction as the processing axis C ( (In the parallel direction) (the second and third embodiments are common).

When the depth H of the tip F1 of the electrode tip M1 with respect to the tip cutter 5 is increased, the posture stability at the time of the tipping (direction consistency between the electrode tip M1 and the tip cutter 5) is improved. The movement stroke of the hook plate 37 must be increased.

In the above description, the lower electrode tip M1
Has been described, but the tip cutter 5 is appropriately changed as necessary, the dresser body 1 is turned upside down, and the dressing operation of the upper electrode tip M2 is performed.

Next, the operation of the tip dresser of the third embodiment will be described. An operator holds the base portion 6 of the dresser body 1 by hand, and as shown in FIG. The tip cutter 5 provided at the tip 2 of the dresser body 1 is brought close to the lower electrode tip M1 at the tip of the shank 23.

In the state shown in FIG. 22, the tip 2 of the dresser body 1 is inserted between the upper and lower electrode tips M1 and M2 from the horizontal direction, and the machining axis C of the lower electrode tip M1 and the tip cutter 5 is set. Match
With the concave portion 20 of the tip cutter 5 covered with the electrode tip M1, as shown in FIG. 23, the tip cutter 5 is placed on the electrode tip M1.

Then, the adjustment lever 50 provided on the upper surface of the tip end portion 2 of the dresser body 1 is changed from the state of FIG. 22 to the state of FIG. 23 (from the state of the two-dot chain line of FIG. 19 to the state of the solid line). When the adjustment lever 50 is rotated at a predetermined angle (between the pair of positioning recesses 55 and 55a provided on the upper surface of the support substrate 40 (see FIG. 19)) on the upper surface (non-process surface side) of the support substrate 40, the processing axis An interval adjuster 53 is moved and arranged on the upper surface of the support substrate 40 on C.

Next, by operating the operating lever 33 of the operating section X disposed on the base section 6 of the dresser main body 1, the pressing substrate 41 is pressed upward and the motor 100 rotates.

The upward movement of the pressing substrate 41 causes the pressing substrate 41
The support substrate 40 disposed on the upper surface side of the distal end portion 2 connected to the slide rods 42, 42a... Moves upward in the direction orthogonal to the pressing substrate 41 (substantially the same direction as the processing axis C (substantially parallel direction)). Then, the spacing adjuster 53 disposed on the upper surface side of the support substrate 40 also moves upward, and the receiving seat 54 provided on the upper surface side of the spacing adjuster 53 is positioned at the tip of the upper electrode chip M2 to be processed. The state is fitted to F2.

When the gripping operation of the operation lever 33 is maintained, as shown in FIG. 18, the tip cutter 5 is rotated, and the upward pressing of the support substrate 40 is maintained. The tip cutter 5 of the dresser main body 1 is pressed by the lower electrode tip M1 to be processed with the electrode tip M2 as a fulcrum, and the tip cutter 5 rotating at a high speed rotates the tip peripheral surface of the lower electrode tip M1 and the tip of the tip center. Cutting and correction of the portion F1 are performed.

The direction in which the tip cutter 5 is pressed against the electrode tip M1 and the state in which they are set are different from those in the second embodiment.

Further, the shape of the receiving seat 54 of the gap adjusting member 53 and the shape of the tip end F2 of the upper electrode tip M2 to be non-processed are matched, or the processing axes C of both are matched with similar shapes. The recess 20 of the cutter 5 and the lower electrode tip M1
The front end F1 is in the fitted state, so that the operation lever
When the support substrate 40 and the pressing substrate 41 are moved in the vertical direction (the same direction as the vertical arrangement of the shank 23) by the gripping operation of the chip 33, the chip cutter 5 moves the lower electrode chip M to be processed.
1 is pressed in contact with the front end portion F1 with a pressing force in a direction along the processing axis C.

Next, as shown in FIGS. 17, 21, 22, 24 and 10, reference numerals given to the thickness of each component will be explained. As shown in FIGS. The distance L between the electrode tips M1 and M2 generally corresponds to the set amount of the welding machine 24, and as shown in FIGS. Is the depth H of the electrode tip M1 to be processed.

Further, as shown in FIG.
The thickness W of the tip 2 including the support substrate 40 is determined by the configuration of the tip 2 of the dresser body 1 and the plate thickness of the support substrate 40. The thickness W of the tip 2 and the like is vertically opposed. What is necessary is just to be able to arrange at the interval L between the electrode tips M1 and M2,
That is, there is a relation of L> W.

Further, as shown in FIGS.
The protrusion amount W1 of the spacing adjuster 53 provided on the upper surface of the
Indentation amount H, stroke S of support substrate 40 and pressing substrate 41
(Refer to FIG. 24).
The protrusion amount W1 is determined such that the tip end 2 and the like having a thickness W are arranged at an interval L between M1 and M2 and the dresser body 1 is lowered by an indentation amount H so that the interval adjusting body 53 can be arranged. You. That is, the condition is L> W−H + W1.

As shown in FIG. 24, the amount of depression W2 of the receiving seat 54 provided on the upper surface of the gap adjuster 53 is basically such that the tip end portion F2 of the electrode tip M2 to be non-processed is fitted. It is determined from the shape and the depth having the seating stability.

As shown in FIG. 24, the vertical movement stroke S of the supporting substrate 40 and the pressing substrate 41 disposed above and below the tip 2 of the dresser main body 1 is determined by the thickness of the tip 2 and the thickness of the supporting substrate 40. W, the amount of indentation in the tip cutter 5, the amount of protrusion W1 of the spacing adjuster 53, and the amount of movement determined by the amount of depression W2 of the receiving seat 54. That is, L> W−H + W1−W2 =
S.

The following is a summary of example dimensions and operating dimensions of each component on the machining axis C described above. L> W L> W−H + W1 L> W−H + W1−W2 = S

Another embodiment of the third embodiment of the present invention will be described in consideration of the above-described example of dimensions and the like. The adjustment lever 50 is provided with a spacing adjuster 53 having a receiving seat 54. The receiving seat 54 of the tip portion F2 of the upper electrode tip M2 to be non-processed may be directly provided on the upper surface of the device to omit the space adjuster 53, and the space adjuster 53 can be retracted from the processing axis C. Instead, it may be provided directly on the support substrate 40, or only the receiving seat 54 may be provided on the support substrate 40.

Further, the amount H of indentation of the tip end F1 of the electrode tip M1 into the tip cutter 5 can be increased,
When the amount of depression W2 is increased, the consistency of the movement direction is improved, but the stroke S must be increased. When the distance L in the welding machine 24 is large, the amount of protrusion W1 of the distance adjusting body 53 is increased. , And by appropriately changing these dimensions, the versatility is improved.

A receiving seat corresponding to the protrusion amount W1 of the spacing adjuster 53 corresponding to the spacing L between the vertically opposed electrode tips M1 and M2, or the shape of the tip F2 of the electrode tip M2.
The shape and configuration of the interval adjuster 53 whose setup is changed to correspond to the shape of 54 may be changed as shown in FIG.

That is, the shape of the receiving seat 54 of the gap adjusting member 53 does not correspond to the shape of the tip F2 of the electrode tip M2, and the tip F2 of the cylindrical cap is attached to the tip F2 of the electrode tip M2. And the tip holder
Fixing material 62 such as thumb screws and bolts screwed to the cylindrical portion 61 of 60
Is provided, the tip holder F2 is fixed to the tip end F2, and a seating projection 63, which can be freely fitted to the receiving seat 54 of the gap adjusting body 53, is provided at the tip of the tip holder 60, and the spacing is provided via the tip holder 60. The adjusting body 53 is brought into contact with the tip F2 of the electrode tip M2.

In the above-described example using the chip holder 60, the spacing adjuster 53 on which the seating projection 63 of the chip holder 60 can be freely seated may be provided directly on the support substrate 40 in addition to the adjustment lever 50. .

Further, the electrode tip M formed on the spacing adjuster 53
In the shape of the receiving seat 54 on which the tip portion F2 of FIG. 2 is seated, as shown in FIG. 26, if a tapered portion, a ring-shaped flat portion, a tapered portion, and a small-diameter circular space portion are provided from above, the tip portion F2 Most shapes can be supported.

In the above description, the lower electrode tip M1
The dressing work described above was explained, but if necessary, the tip cutter 5 and the spacing adjuster 53 were appropriately changed, the dresser body 1 was turned upside down, and the processing target and the non-processing target serving as a fulcrum were replaced. The dressing work of the upper electrode tip M2 is performed.

[0093]

Effects of the Invention In summary the present invention, the distal end portion 2 of the dresser main body 1, the motor 100 of the cutter case 4, rotatably mounted Rutotomoni, the cutter case 4 having a chip cutter 5 for dressing the electrode tip M1, M2
, So that the electrode tips M1, M2
Can be dressed with the rotating tip cutter 5.

Further, since the starting lever 11 of the operating portion X for operating the motor 100 is provided on the dresser main body 1 and the action portion Z for pressing the tip cutter 5 against the electrode tips M1 and M2 is provided, the electrode tips M1 and M2 are provided. Because of the fixed state, the pressing force of the tip cutter 5 against the electrode tips M1 and M2 is remarkably increased as compared with the conventional pressing operation in the state where the dresser body 1 is gripped, and the cutting force can be improved.

Further, an operating lever 33 of the operating portion X for operating the operating portion Z via the transmitting portion Y is provided, so that the starting lever 11 and the operating lever 33 can swing freely on the same surface, and the swinging operation can be performed. The operating lever 33 is arranged to swing the starting lever 11, so that the starting lever 11 of the motor 100 in the operating section X and the operating lever 33 of the operating section Z are arranged at the same position, so that the operating lever 33 is Just operate the starting lever
Eleven operations are possible, and the dressing operation can be performed easily and with one hand.

The operating portion X of the starting lever 11 and the operating lever 33 is provided on the base portion 6 of the dresser main body 1 so that the shank 23, the welding guns 25 and 25 can be made compact.
When the dresser body 1 is used in a welding machine 24 in which a plurality of a are arranged, if there is an insertion space for the dresser body 1, the dressing work can be performed. Can be done.

Further, on the processing surface side of the dresser body 1, an interlocking rod 36 swinging substantially along the direction of the processing axis C is provided, and a hook plate 37 is provided at the tip of the interlocking rod 36. Is provided at the distal end of the electrode tips M1 and M2 by operating the operating members such as the operating lever 33 and the interlocking rod 36. Hook plate hooked on
By the swing of 37, the hook plate 37 is moved to the shank 23, 23.
a, the moving fulcrum of the dresser main body 1 having the tip cutter 5 becomes the engaging portion, and the presence of the pressing fulcrum as compared with the pressing operation in the conventional gripping state of the dresser main body 1 , Electrode tips M1, M2
And the pressing force of the tip cutter 5 against the electrode tips M1 and M2 can be easily increased.

A support substrate 40 and a pressing substrate 41 are arranged in parallel on the upper and lower surfaces of the tip portion 2 of the dresser main body 1.
Since the supporting substrate 40 and the pressing substrate 41 are slidably mounted in the same direction of the processing axis C, the electrode chips M1,
The tip cutter 5 for dressing M2 can be slid in the same direction of the processing axis C, and therefore, the pressing direction of the tip cutter 5 against the electrode tips M1 and M2 is defined as a predetermined direction (direction of the processing axis C). Thus, the electrode tips M1 and M2 can be dressed in a desired shape.

Further, an interlocking rod 36 for urging the supporting substrate 40 to be seated on the non-processed surface side of the distal end portion 2 to slide the supporting substrate 40 and the pressing substrate 41 is provided. At the tip of the hook plate 37, the electrode tips M1, M2 of the shank 23, 23a are provided.
Is provided so that the pressing substrate 41 can be easily slid and pressed by operating members such as the operating lever 33 and the interlocking rod 36. That is, the dresser main body 1 against the electrode chips M1 and M2 is provided. Can be easily performed.

Further, since the receiving seat 54 on which the non-processed electrode tip M2 is seated is provided on the non-processed surface side of the support substrate 40, the moving fulcrum of the dresser body 1 having the tip cutter 5 is moved to the receiving seat 54. Is formed with the other electrode tip M2 with which the tip cutter abuts, and the pressing force of the tip cutter 5 against the electrode tip M1 is markedly increased due to the presence of the pressing fulcrum, compared to the pressing operation in the gripping state of the conventional dresser body 1. Can increase.

When the starting lever 11 and the operating lever are not operated,
Since 33 is in a non-contact state, when the operation lever 33 is initially operated, the tip cutter 5 is not rotated, so that careless rotation of the tip cutter 5 can be prevented, and safety can be secured.

In the flow path for supplying the compressed air to the motor 100, the valve case 70, 70a is disposed in the base portion 6, and the flow path 75 is provided in the valve case 70 so that the valve stem 71 is provided.
Is movably disposed, a valve seat 72 is provided on a valve case 70, and a valve body 73 attached to a valve rod 71 so as to be freely seated on the valve seat 72.
The tip of the valve rod 71 is made to protrude from the base portion 6 and can be pressed by the starting lever 11, and the valve body 73 is urged by the spring 74 in the seating direction of the valve seat 72, and is continuously connected to the valve body 73. Valve stem
Since the base end portion 71c of the base 71 has a starting flow path 76 having a diameter slightly smaller than that of the valve case 70, when the electrode tips M1 and M2 and the tip cutter 5 are close to each other by the operation of the operating lever 33, or in a light contact state. In this case, since the tip cutter 5 rotates at a low speed, the work stability can be ensured. When the electrode tips M1 and M2 and the tip cutter 5 are in a pressing contact state, the tip cutter 5 performs dressing at a high speed. Can be done.

The hook plate 37 which moves with respect to the tip 2 of the dresser body 1 or its mounting member (interlocking rod 3)
6, the support substrate 40, etc.) and a contact terminal rod 92 whose position can be adjusted, and a contact substrate 97 with which the contact terminal rod 92 comes in contact with the tip portion 2 of the dresser body 1 to detect the amount of wear of the electrode chip M1. Since the means 90 is provided, the fact that the electrode chip M1 has worn out and has reached the end of its service life can be detected by the contact of the contact terminal rod 92 with the contact board 97, and the time for replacing the electrode chip M1 can be easily confirmed. I can do it.

Further, the contact terminal rod 92 is attached to the hook plate 37,
Since the position of the contact terminal rod 92 can be adjusted and is urged in the direction of the dresser body 1, even if the contact terminal rod 92 collides with the contact substrate 97 when the operation lever 33 is operated, the spring 96 is compressed and the contact terminal rod 92 is retracted. Therefore, the collision force can be reduced to prevent damage to the contact terminal rod 92, the contact board 97, and the like, and the practical effect is extremely large.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall view of a welding machine and a dresser main body.

FIG. 2 is a side view of a dresser body according to the present invention.

FIG. 3 is a bottom view of a main part of FIG. 2;

FIG. 4 is a left side view of FIG. 2;

FIG. 5 is a right side view of FIG. 2;

FIG. 6 is a sectional view of FIG. 2;

FIG. 7 is an enlarged sectional view of a main part of a supply passage of compressed air.

FIG. 8 is a main part side view showing an operation state of installing a dresser main body on an electrode chip (cap chip).

FIG. 9 is a main part side view showing a dressing state of the electrode tip by the dresser body.

FIG. 10 is an enlarged sectional view showing a dressing part.

FIG. 11 is a side view of the tip cutter.

FIG. 12 is a side view of a dresser main body provided with a wear amount detecting means.

FIG. 13 is an enlarged sectional view of a main part of the wear amount detecting means.

FIG. 14 is a side view of a main part of a dresser according to a second embodiment.

FIG. 15 is a sectional view of the translation member of FIG. 14;

FIG. 16 is a main part side view showing an example of use of the adjustment plate.

FIG. 17 is a perspective view showing an overall view of a welding machine and a dresser body of a third embodiment.

FIG. 18 is a side view of a dresser main body according to a third embodiment of the present invention.

FIG. 19 is a plan view of a main part of FIG. 18;

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

FIG. 21 is a sectional view taken along the line BB of FIG. 19;

FIG. 22 is an essential part side view showing a work state of installing a dresser main body on an electrode tip.

FIG. 23 is a main part side view showing a state where the dresser main body is installed with respect to the electrode tips.

FIG. 24 is a main part side view showing a dressing state of the electrode tip by the dresser body.

FIG. 25 is a side view of a main part of another embodiment showing a contact portion between a gap adjusting body and a tip of an electrode tip to be processed.

FIG. 26 is a partial cross-sectional view of the spacing adjuster showing a corresponding example of the shape of the receiving seat and the shape of the tip of the non-processed electrode tip seated on the receiving seat.

FIG. 27 is a schematic side view showing a conventional working state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dresser main body 2 Tip part 4 Cutter case 5 Tip cutter 6 Base part 11 Starting lever 23 Shank 26 Mounting shaft 33 Operating lever 36 Interlocking rod 37 Hook plate 38 Hook groove 40 Support substrate 41 Press substrate 54 Receiving seat 70, 70a Valve Case 71 Valve rod 71c Base end 72 Valve seat 73 Valve body 74 Spring 75 Flow path 76 Starting flow path 90 Wear detection means 92 Contact terminal rod 97 Contact board 100 Motor C Processing axis M1, M2 Electrode chip X Operating part Y Transmission Part Z Working part

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23K 11/00-11/36 330

Claims (8)

(57) [Claims] The tip portion of claim 1. A dresser body, the cutter case with a chip cutter to dress the electrode tip, with attached rotatably, the cutter case
The operating lever for operating the motor to be driven to rotate is provided on the dresser body, the operating part for pressing the tip cutter against the electrode tip is provided, and the operating lever for operating the operating part via the transmission part is provided. , The starting lever and the operating lever can be swung on the same plane,
A tip dresser characterized in that an operating lever that is operated to swing swings a starting lever. 2. An interlocking rod that swings substantially along the direction of the processing axis is provided on the processing surface side of the dresser body, a hook plate is provided at the tip of the interlocking rod, and a shank is provided at the tip of the hook plate. 2. A tip dresser according to claim 1, further comprising a retaining groove fitted to a mounting shaft of said electrode tip. 3. A support substrate and a pressing substrate are arranged in parallel on upper and lower surfaces of a tip portion, and the supporting substrate and the pressing substrate are slidably mounted in the same direction of a processing axis of the tip portion, and a non-processing of the tip portion is performed. The supporting substrate is urged to be seated on the surface side, an interlocking rod for sliding the supporting substrate and the pressing substrate is provided, and a hook plate is provided at the tip of the pressing substrate,
2. A tip dresser according to claim 1, wherein a hook groove is provided at a tip end of said hook plate so as to be fitted to a mounting shaft of an electrode tip of said shank. 4. A supporting substrate and a pressing substrate are disposed in parallel on upper and lower surfaces of a tip portion, and the supporting substrate and the pressing substrate are slidably mounted in the same direction of a processing axis of the tip portion, and a non-processing of the tip portion is performed. The support substrate is urged to be seated on the surface side, a receiving seat on which the electrode chip to be processed is seated is provided on the non-processed surface side of the support substrate, and an interlocking rod for sliding the support substrate and the pressing substrate is provided. The tip dresser of claim 1, wherein: 5. The tip dresser according to claim 1, wherein the starting lever and the operating lever are in a non-contact state when not operating. 6. In a flow path for supplying compressed air to a motor, a valve case is disposed on a base portion, and a valve rod having a flow path in the valve case is disposed so as to be movable. In addition to providing a seat, a valve body attached to the valve stem so as to be freely seated on the valve seat is disposed, and the tip of the valve stem is made to protrude from the base portion so that the valve body can be pressed by the starting lever. A starting flow path which is urged by a spring in a direction to form a base end portion of the valve stem connected to the valve body with a slightly smaller diameter than the valve case.
Or 5 tip dressers. 7. A hook terminal that moves with respect to the tip of the dresser main body or a contact terminal rod whose position can be adjusted is provided on a mounting member thereof, and at the tip of the dresser main body,
The tip dresser according to claim 2, wherein a contact substrate with which the contact terminal rod contacts is provided, and a means for detecting a wear amount of the electrode tip is provided. 8. The tip dresser according to claim 7, wherein the contact terminal rod is attached to the hook plate so as to be adjustable in position and biased toward the dresser body.