JPS6092484A - Surface coating device - Google Patents

Abstract

PURPOSE:To perform automatically coating treatment for long time in the stage oscillating an electrode rod formed of a superalloy, bringing said rod into contact with the surface of a material to be worked, and coating the sintered hard alloy on the surface by the spark discharge during the contact by supplying successively the many electrodes to a chuck by means of a hydraulic cylinder. CONSTITUTION:An electrode rod 2 formed of a sintered hard alloy is gripped by a chuck 11. The chuck 11 is vertically oscillated by an oscillator 15 and the top end thereof is attached and detached to and from the surface of a material 22 to be worked to generate spark discharge between both, thereby forming a coating layer on the surface of the metal 22 as a result of melting by the spark of the electrode 2. The many rods 2 are housed into a magazine 1 in this case and a pressed by a spring 4 via a pressuring plate 3. When the electrode rod decreases its length on consumption, the decreased length is detected by the contact between a limit switch 18 and an arm 16 and the chuck 11 is opened and closed by a control device 29, by which the rod 2 is lowered. When the rod 2 is made as short as the rod is disengaged from the chuck 11, the fresh electrode 2 in the magazine 1 is supplied to the chuck 11 by the piston rod 7 of a hydraulic cylinder 5 so that the coating treatment is continuously accomplished.

Description

[Detailed description of the invention] The present invention relates to a surface coating device.

A wire-shaped or rod-shaped electrode made of a coating material is held by a vibrating holder equipped with a vibrator, and the free end of the electrode is lightly brought into contact with the surface of the workpiece while vibrating, so that the tip of the electrode is brought into contact with the surface of the workpiece. A surface coating device that forms a coating of cemented carbide or the like on the surface of the workpiece by applying electricity between the workpiece and the workpiece to generate a spark discharge is well known and widely used.

Most of the above-mentioned surface coating devices were operated by holding an electrode vibrating head in the hand, but recently, for example, Japanese Patent Publication No. 40-019439 and Japanese Utility Model Publication No. 41-0192 have been developed.
It has become common practice to have a vibrating head as described in Japanese Patent Application No. 34 held by a servo head of a mechanical device and perform various types of automatic surface coating over a long period of time by ζ, tracing or numerical control.

However, in the surface coating device, the electrode made of the coating material wears out as the machining progresses, so if the length of the electrode becomes less than a certain length, the machining is temporarily stopped and the electrode is fed out each time. There was a problem in that when the part became empty, the electrode had to be removed from the vibration holder of the vibrator and replaced with a new electrode.

Therefore, replacing the electrodes in the surface coating device is a complicated task and impedes long-term unattended operation.

The present invention has been made based on the above-mentioned viewpoints, and its purpose is to automatically replace the electrode with a new one when the electrode wears out below a certain length, or to If the wear on the tip end reaches the limit in this holding state, the holding is automatically released and the electrode is fed out for a predetermined length, held and processed, and the electrode is fed out one or more times and then The present invention aims to provide a surface coating device that is configured to automatically replace the electrode with a new electrode when the worn length reaches a predetermined limit, and can operate unattended for a long period of time. be.

The above purpose is to connect an electrode made of an electrode material and a workpiece to a power supply circuit, and to vibrate the electrode to bring it into contact with and separate from the surface of the workpiece to be coated to coat the surface of the workpiece. a chuck that removably holds the electrode on a surface coating device for coating the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface of the surface. A device that feeds and arranges an electrode held in a chuck so that it can be fed to a predetermined length, an electrode magazine that stores a plurality of electrodes to be attached to the chuck, and one of the electrodes housed in the electrode magazine. An electrode attachment device that can take out one electrode and hold it in the chuck, and further, if necessary, when the chuck abandons the worn electrode on the surface of the workpiece.
(2) A consumable electrode removal device for removing the workpiece from the machined surface, the above-mentioned chuck, the above-mentioned feed adjustment device, the above-mentioned electrode mounting device, the operation of the above-mentioned consumable electrode removal device, power supply circuit, processing feed and other known components. This is achieved by attaching a device to control the operation of the

Hereinafter, the details of the present invention will be specifically explained with reference to the drawings.

Fig. 1 is an explanatory diagram showing one embodiment of the surface coating device according to the present invention, Fig. 2 is an explanatory diagram showing a state in which an electrode is attached to the chuck, and Fig. 3 is an explanatory diagram showing another embodiment. The explanatory diagram, FIG. 4, shows that the electrode is attached to the chuck f=t i
FIG. 5 is an explanatory diagram showing another embodiment of the present invention.

In Figures 1 and 2, 1 is an electrode magazine, 1a and 1b
is a hole formed in the electrode magazine 1, 2.2 is an electrode housed in the electrode magazine 1, 3 is a pressing plate, 4 is a spring, 5 is a hydraulic cylinder, G is a piston, 7 is a piston rod, 8 8a is a hydraulic switching valve, 8a is a solenoid coil, 8b is a spring, 9 is a hydraulic tank, 10 is a hydraulic pump, 11 is a chuck, 12 is a gear attached to the tip of the chuck 11, and 13 is fixed to the side wall surface of the chuck. A chuck opening/closing motor 15 has a gear 14 attached to its shaft meshing with a gear 12 attached to the chuck 11, and a motor 15 applies vibration to the electrode 2 attached to the chuck 11 via an arm 16. 17 and 18 are limit switches;
9 is a compressed air injection device, KA is a solenoid valve, 21 is a cylinder, 2
2 is the workpiece, the wing and U are the cross slide table, 5
is a turntable provided on the cross slide table 23 in order to give a rotational position to the workpiece 22;
．． 24 and a morph that drives the turntable 25, 29
morphs 26, 27 and 28 that drive the cross slide table 23, 24 and turntable 5, chuck 1
A chuck opening/closing motor 13 that opens and closes the chuck 1 via gears 12 and 14, a hydraulic switching valve 8, a vibrator built in the housing 15 and giving vibration to the chuck 11, a solenoid valve 20, etc. are collectively controlled according to a predetermined program. This is a control device with a built-in numerical control device.

Thus, the electrode 2 attached to the chuck 11 is housed in the electrode magazine 1, and is held and housed by the pressing plate 3 through the elastic force of the spring 4. Holes 1a and 1b are formed in the electrode magazine 1 at positions facing the piston rod 7 and chuck 11 of the hydraulic cylinder 5, respectively.

A gear 12 is attached to the tip of the chuck 11, and the gear 12 meshes with a gear 14 attached to the shaft of a chuck opening/closing motor 13 fixed to the side wall of the chuck 11. The chuck 11 is opened and closed by rotation.

The attachment of the electrode 2 to the chuck 11 and the extrusion length adjustment setting corresponding to the wear and tear of the Wi electrode attached to the chuck 11 are performed by the hydraulic cylinder 5. That is,
When the chuck opening/closing motor 13 rotates to open the chuck 11, a signal is sent from the control device 29 to the solenoid coil 8a of the hydraulic switching valve 8, the hydraulic switching valve 8 is switched, and the piston rod 7 of the hydraulic cylinder 5 is switched. When the electrodes 2.2 are pushed downward through the hole 1a of the electrode magazine 1, one of the plurality of electrodes 2.2 arranged and housed in the electrode magazine 1 passes through the hole 1b of the electrode magazine 1.
The chuck 11 is pushed out and inserted into the mounting position. When the electric FA 2 is inserted into the chuck 11, the chuck opening/closing motor 13 rotates in the reverse direction, the chuck 11 is closed, and the electrode 2 is fixed.

A voltage pulse is supplied between the electrode 2 and the workpiece 22 from a power supply circuit (not shown), and at the same time, the chuck 11 is given vertical vibration via the arm 16 by a vibrator housed in the housing 15. By lightly touching and separating the free end of the electrode 2 attached to the chuck 11 from the surface of the workpiece 22, a spark discharge is generated between the two, and the workpiece 2
The surface of the electrode 2 is coated with a cemented carbide or the like constituting the electrode 2.

The electrode 2 attached to the chuck 11 is fixed with its tip exposed for a predetermined length, but as the machining progresses, the die @ 2 wears out and becomes shorter, and the chuck 11 accordingly moves downward. When the arm 16 that moves and holds the chuck 11 comes into contact with the limit switch 18 provided in the housing 15, the vibrator (not shown) housed in the housing 15 is temporarily stopped. At the same time, the chuck 11 is pulled upward.

When the chuck 11 is pulled upward and the arm 16 comes into contact with the edge 1, the chuck opening/closing motor 13 rotates to open the chuck 11, and the lower end of the electrode 2 contacts the surface of the workpiece 22. After the electrode 2 is mounted on the chuck 11 as described in n11,
The piston rod 7, which was waiting so that its tip end is at the front and rear positions of the hole 1b, descends and pushes out the electrode 2 until it comes into contact with the surface of the workpiece 22, and the piston rod 7 restore to the state. In this case, the chuck opening/closing motor 13 rotates in the opposite direction to tighten the chuck 11 and start the surface coating process again.

This cycle is repeated a predetermined number of times, the electrode 2 is consumed to a predetermined length or less, and as a result of the above operation, the electrode 2 is removed from the chuck 1.
1, the chuck 11 is pulled upward by appropriately detecting this, and the arm 1G comes into contact with the limit swing 17, and the vibrator (not shown) housed in the casing 15 was temporarily stopped, and
If necessary, the tosock opening/closing motor 13 is rotated to adjust the loosening of the chuck 11, and on the other hand, the chuck 11 is
The electrode 2, which has fallen onto the processing surface of the workpiece 22, is removed from the processing surface of the workpiece 22 by compressed air supplied from the compressed air injection device M19 from the cylinder 21 through the solenoid valve 20. At the same time, in response to the electrode 2 dropping, a signal is sent from the control device 29 to the solenoid coil coil ba of the hydraulic switching valve 8.
is switched, and the piston rod 7 of the hydraulic cylinder 5, which has once risen to the highest position, returns to the hole 1a of the stacked magazine ■.
One of the plurality of electrodes 2 . The predetermined attachment is inserted into position.

At the same time that the tip of the ffl pole 2 reaches the surface of the workpiece 22, the chuck opening/closing motor 13 rotates in the opposite direction, tightening the chuck 11, fixing the electrode 2 to the chuck 11, and attaching the electrode 2. Complete. Thereafter, when the hydraulic switching valve 8 is switched and the piston rod 7 is pulled upward and returned to the predetermined waiting position or the original position, the surface coating process is started again.

Note 1. To replace the above-mentioned new electrode 2, chuck 11
The number of times of extrusion adjustment operation to compensate for wear of the electrode 2 attached to the
Electric II 21 inside chuck 11! This can be implemented by providing an appropriate mechanism for detecting when the electrode is consumed below a certain length, such as by providing an end position detector.

In addition, the rod 7 that takes the new electrode 2 also serves as a consumable extruder for the electrode 2 held by the chuck 11.
The latter may be a separate configuration, for example, a mounted electrode 2 feeder 111 may be provided within the chuck 11.

Next, FIGS. 3 and 4 will be explained.

In Figures 3 and 4, the same numbers as those in Figures 1 and 2 indicate the same components, 30 is the housing, 3I is the motor, and 31a is the above-mentioned. A shaft 32 of the motor 31 is moved up and down as the motor 31 rotates, and a rod 33 is inserted into a position to push out the electrode 2 housed in the electrode magazine 1 and install the electrode attachment holder 11. is a disk fixed to one end of the rod 32, and 34 is a support shaft that movably supports the disk 33 attached to the rod 32.

Thus, the device shown in this embodiment has the chuck 11 of the electrode 2.
The rotation of a motor 31 performs feeding and mounting to the electrode 2 and correction of extrusion consumption due to consumption of the attached electrode 2. A housing 30 in which an electrode extrusion mechanism is built is fixed to the electrode magazine 1.

A motor 31 is fixed to one end of the inner peripheral wall surface of the housing 30, and the motor 31a is threaded and engages with a female thread formed on the disc.

Therefore, the motor 3 attached to the housing 30
1, the rod 32 can move in the vertical direction in the figure.

Thus, the attachment of the electrode 2 to the chuck 11 is performed by the motor 31. gII, when the chuck opening/closing motor 13 rotates and the chuck 11 is opened, the control device 29
A signal is sent to the motor 31, the motor rotates, and the rod 32 is pushed downward through the hole 1a of the electrode magazine 1, and the plurality of electrodes arranged and housed in the electrode magazine 1 are pushed down. 2. Push out one of the electrodes from the hole tb of the electrode magazine 1 and insert it into the position where the chuck 11 is installed, and then the chuck opening/closing motor 13 rotates in the reverse direction to close the chuck 1. ζ electrode 2 is fixed.

In addition, if the electrode 2 is consumed to a predetermined length or less, the chuck 1
1 is pulled upward and the arm 16 comes into contact with the limit switch 17, a vibrator (not shown) housed in the housing 15 is temporarily stopped, and the chuck opening/closing motor 13 rotates to open the chuck 11. When loosened, the electrode 2 falls onto the work surface of the workpiece 22 or is pushed out by the rod 32 or by the next new electrode 2. The removed electrode 2 is removed from the processing surface of the workpiece 22 by compressed air supplied from the cylinder 21 via the solenoid valve 20 from the compressed air injection device 19, and at the same time a signal is sent to the motor 31 from the control unit W129. is sent, the motor rotates, and the rod 32 is pushed downward through the hole 1a of the electrode magazine 1, and the plurality of electrodes 2.2 housed in the electrode magazine 1 in an aligned manner.
One of them is pushed out from the hole 1b of the electrode magazine 1 and attached to the chuck 11.

When the electrode 2 is attached to the chuck 11 and the tip of the electrode 2 is exposed for a predetermined length from the tip of the chuck 11, the chuck opening/closing motor 13 rotates in the opposite direction to tighten the chuck and remove the electrode. 2 is chuck 11
The attachment of the electrode 2 is completed. Thereafter, when the motor 31 is reversely rotated and the rod 32 is pulled upward and returned to its original position, the vibrator is operated again and surface coating processing is started.

Since the present invention is configured as described above, when the surface coating device according to the present invention is used, if the fftfi is consumed to a certain length or less, it is automatically replaced with a new electrode, so that unattended operation for a long time is possible. It can be done.

Note that the present invention is not limited to the above embodiments. That is, for example, in this embodiment, the electrodes are pushed out from the electrode magazine using a hydraulic cylinder or a motor, but 1. The same effect can be achieved by using a solenoid coil or the like. In addition, although the electrode housed in the electrode magazine is configured to be held down by the elastic force of a spring via a suppressing plate, it is possible to hold down the Ti poles housed in the electrode magazine, and one by one. Any other method may be used as long as it is possible to take out each book individually.The configuration of this type of electrode attachment device is, for example, for various types of automatic tool changers in machine tools, mini robots, etc. The shape of the chuck, the method of applying vibration to the electrode, the method of fixing the electrode, etc. can be freely changed in design according to the purpose of the present invention.

That is, for example, FIG. 5 is an explanatory diagram showing an embodiment of the present invention, and the same reference numerals are given to the same objects or objects with the same function as those of the previous embodiment.

In this embodiment, a used electrode 2 that has consumed more than a certain value is gripped and taken out from a chuck 11, collected in an appropriate collection container (not shown), etc., and then a new electrode 2 is gripped and taken out from an electrode magazine 1. A robot hand 40 is provided as an electrode mounting device that supplies and attaches the electrode to the chuck 11.

The robot hand 40 has a head portion provided at the tip of a shaft 42 that is extendable and retractable in a vertical axis direction with respect to a fixed body portion 41 and is rotatable around the vertical axis; A rotating shaft 44 that extends diagonally downward at a predetermined angle, and a grip portion 46 that is attached to the tip of a shaft 45 that is coaxial with the shaft 44 and is extendable and retractable in the axial direction so as to be able to swing at a predetermined angle with respect to the vertical axis.
Although the details of the mechanism for gripping and releasing the electric FA2 of the gripping part 4G are omitted, the electrode 2 attached to the chuck 11 is Rechucking of the chuck 11 due to wear correction, that is, the electrode 2 is removed by the gripping part 46.
A wear-out correction operation is performed in which the forepart is gripped, the chuck 11 is loosened, the electrode 2 is pulled out to a predetermined length toward the distal end, the chuck 11 is tightened, and the grip is released. Such wear-out correction is no longer possible. When a certain value is reached, the chuck 11 is moved to a predetermined electrode exchange position, and the shaft 42.4
4 and 45 and the gripping part 46, grip the electrode 2 of the chuck 11 to be removed, loosen the chuck 11,
The electrode 2 is pulled out from the rack 11, the electrode 2 is moved to a predetermined position by the operations 44 and 45, the grip is released, the electrode is allowed to fall, and a new electrode 2 from the electrode magazine 1 is gripped. This new electrode 2 is transferred to the chuck 11 and inserted, the chuck 11 is tightened, the grip of the grip part 46 is released, and the grip part 4G is moved to the predetermined original position by operating the shafts 42, 44 and 45. Return to position,
It is like waiting for the next wear correction or replacement of the electrode 2.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of the surface coating device according to the present invention, Fig. 2 is an explanatory diagram showing a state in which an electrode is attached to the chuck, and Fig. 3 is an explanatory diagram showing another embodiment. An explanatory diagram, ff14, is an explanatory diagram showing a state in which an electrode is attached to the chuck, and FIG. 5 is an explanatory diagram showing another embodiment of the present invention. 1-・・-・・−・−・・・・−−−−−f′tI pole magazine 2・−・−・−−−m−・・−・・−・・Electrode 3−・・−・−・−−−−−−1・−11−−−Press plate 4・・−・−1111−−−−・・−・・−・Spring 5−−−−・・−・−・−・・・・・−・・−
Hydraulic cylinder 6・−111−−−−−−−・−・−
−−−−Piston 7・〜・・−・・−−−−−・・−・
−・−・Piston rod 8−・・−・−・・・
−−−−・・−−− Hydraulic pressure switching valve 11・・・−・・−・
...−・−11−−・−Chuck 12.14−・−
・・−−−−〜−−−−−−Gear 13・・・・・・−・・
−・−・−・−・−・Chuck opening/closing motor 16−・−
-11--------・-11---------・-Arm 17
．． 18・-m−・−−−・・−・・−−−−Limit switch 19−−−−−・−・・−−−−−−1−−−
・−Compressed air injection device 22・−・・−・・・・・−−
−・・−・−・・Workpiece body part, Sae −−−−・・−・
−1−−−・−−1−Cross slide table anger・−・
・−・・・−・−・−−−−−1 Turntable 2
9---------1・・-1-----
Control device 40・−・−・−・−・−−−−−・−・−−
--・Robot hand patent applicant Inoue Japanx Research Institute Agent (7524) Shotabe Mogami

Claims (1)

[Scope of Claims] An electrode made of an electrode material and a workpiece are connected to a power supply circuit, and the electrode is vibrated and brought into contact with and separated from the surface of the workpiece to be coated to coat the surface of the workpiece. A surface coating device for coating a surface includes a chuck configured to removably hold the electrode and to discard the electrode when it wears out beyond a certain length, and an electrode magazine that stores a plurality of electrodes to be attached to the chuck. , an electrode mounting device capable of taking out one of the electrodes housed in the electrode magazine and holding it in the chuck, the operation of the chuck, the electrode mounting device, a power supply circuit, processing feed, and other known methods. The surface coating device described above, further comprising a device for controlling the operation of the constituent elements.