JPH05230523A - Automatic changer for high-frequency hardening head of high-frequency hardening device - Google Patents

Abstract

PURPOSE:To automate the change of preparatory plans by constituting the high-frequency hardening device in such a manner that its hardening head can be exchanged. CONSTITUTION:A high-frequency hardening head 100 has a lead plate 110 connected to a hardening coil and a coupling member 150. The coupling member 150 supports the lead plate 110 and the hardening coil 120 via an insulating member 170. The hardening head 100 is freely attachably and detachably coupled to a body 50 side via a coupler 60. The coupler 60 has a first coupling means 65 and a second coupling means 70. This first coupling means 65 holds the lead plate 110 on a head side by means of two sheets of lead members opened and closed by cylinders, thereby attaining electrical coupling. The second coupling means 70 has couplers for hardening water, cooling water for the coil, air, etc., and mechanically holds the coupling member 150 on the head side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic quenching head changing device in an induction hardening device.

[0002]

2. Description of the Related Art For example, parts such as a sliding surface of a bed of a machine tool and a spindle are hardened to improve the surface hardness. The induction hardening apparatus heats the hardening surface of the work by high frequency induction and rapidly cools the heating surface with cooling water or the like to form a hardening layer. In order to effectively induction-heat the hardened surface of the workpiece, it is preferable to dispose the induction hardening coil as close as possible to the hardened surface and supply a high frequency current to the coil. Since various cross-sectional shapes of the hardened surface of the work exist, it is necessary to prepare an induction hardening coil having an optimum shape for each cross-sectional shape. For example, Japanese Patent Application Laid-Open No. 57-63626 discloses a device in which the same coil is rotated and used with respect to a left and right symmetrically hardened surface. In addition, JP-A-57-79
Japanese Patent Publication No. 115 discloses a quenching device in which the angles of two coils that simultaneously heat two quenching surfaces can be adjusted.

[0003]

The induction hardening head is equipped with a quenching water supply device and a cooling water supply device for cooling the coil, in addition to a coil member for supplying a high frequency current. In addition, it is equipped with an air supply device to remove sludge generated during quenching. It took a long time to replace these heads which require connection of electricity, water and air. The present invention provides an automatic exchange device for an induction hardening head that automatically achieves these connections.

[0004]

A main body for mounting an induction hardening head and guiding it to a hardening surface of a work includes a transformer for generating a high frequency current, and a coupling device for supporting the hardening head in an exchangeable manner. Have. The connecting means includes a first connecting means for sandwiching and connecting a lead plate for sending a high frequency current to a coil of the quenching head,
Second coupling means having a coupling for mechanically coupling the head side coupling member is provided. The second coupling means includes a quenching water coupler, a cooling water coupler such as a coil and a lead plate, and an air supply coupler.

[0005]

Since the quenching head having the induction quenching coil and the nozzle for cooling water can be automatically attached and detached, a large number of replacement heads can be prepared and automatically replaced.

[0006]

1 is a side view of an induction hardening apparatus showing an embodiment of the present invention. The induction hardening apparatus indicated by reference numeral 1 as a whole has a guide surface 25 on the bed 20, and a column 30 is slidably supported on the guide surface 25 via a linear guide 32. A screw shaft 24 driven by a servo motor 22 is arranged on the bed 20 to control the movement of the column 30. The column 30 has a vertical guide surface 35 and slidably supports the cross beam 40. A servo motor 34 provided on the column 30 and a screw shaft 36 connected to the servo motor 34 control the vertical movement of the cross beam 40. The cross beam 40 has a horizontal guide surface 45.
And has a saddle 50 slidably supported. Saddle 50
A transformer 55 and the like for a high frequency power supply are installed inside. A coupling device 60 is provided at the tip of the saddle 50, and the induction hardening head 100 is exchangeably attached via the coupling device 60. The induction hardening head 100 includes an induction coil 120, and heats the surface of the hardening portion 12 of the work 10 and rapidly cools it with hardening water or the like to form a hardening layer. Quenching water and the like are collected by the water receiver 80.

2 is a side view of the coupling device of the saddle 50 and the induction hardening head, FIG. 3 is a view taken in the direction of arrow A in FIG. 2, and FIG. 4 is FIG.
B arrow view, FIG. 5 is a C arrow view of FIG. 3, and FIG. 6 is a D- of FIG.
D sectional view, FIG. 7 is a detailed view of the E portion of FIG. 6, and FIG. 8 is F of FIG.
-F sectional view, FIG. 9 is a GG sectional view of FIG. The coupling device 60 provided on the saddle 50 side includes the first coupling means 6
5 and second coupling means 70. First coupling means 6
5 has a base 650 fixed to the saddle, and the base 650 supports the first lead plate 660 via an insulating plate 652. An actuator 670 such as an air cylinder is attached to the base 650, and the actuator 670 is
The piston rod 672 of the above supports the second lead plate 662 through the insulating member 680 and the bolt member 682. The second lead member 662 is arranged in parallel with the first lead member 660, and the insulating member 680 supporting the second lead member 662 is loosely fitted to the piston rod 672. Therefore, the second lead member 662 can freely come into contact with and separate from the first lead member 660.

Piston rod 6 of actuator 670
A pressing member 674 is attached to the tip portion of 72, and the pressing member 674 presses the second lead plate 662. A tip end portion of the piston rod 672 is engaged with a metal plate member 673, and an insulating plate 674 is attached to the front surface of the metal plate 673. A high-frequency current is supplied to the second lead member 662, but the second lead member is electrically insulated from the actuator and the like. The second coupling means 70 includes a cylinder portion 700 and an engagement portion 72 protruding from the cylinder portion 700.
Has 0. The cylinder part 700 has a quenching water supply port 70.
1, a coil cooling water passage 703, an air supply port 705, an electric connector 707, etc. are provided.

The induction hardening head 100 includes a lead plate 1
10 and a coupling bracket 150, the lead plate 110
Is connected to the quenching coil 120. The coupling coupling 150 made of a metal material has a receiving portion 160 into which the engaging portion 720 is inserted, and both are attached and detached by an appropriate coupling means. The coupling coupling 150 is an insulating member 170.
The lead plate 110 is supported via. The induction hardening head 100 includes quenching water couplers 151 and 152, a lead plate cooling water coupler 153, a quenching coil cooling water coupler 154, an air coupler 155, and a connecting pipe 15.
6, an electric coupler 157 and the like are provided. 5, FIG.
FIG. 7 shows the details of the lead member. The first lead member 660 and the second lead member 662 respectively have cooling water passages 660A and 662A therein, and both passages are connected by a hose 664. It Both lead members 660, 66
2 is supported by the saddle 50 side with the insulating material 663 in between.

FIG. 8 shows a lead 1 connected to a quenching coil.
10 shows a cross section of 10. Lead 110 is copper plate 112 and copper plate 1
It is composed of a copper pipe 114 provided around 12 and two lead plates are laminated with the mica 113 interposed therebetween. FIG. 9 shows the cooling water passage 662 provided in the second lead member 662.
A plan shape of A is shown, and a similar cooling water passage is also provided in the first lead member 660. Both passages are connected by a hose 664. FIG. 10 is a side view showing how the induction hardening head is mounted, and FIG. 11 is a plan view. The induction hardening head 100 includes a first coupling means 65 and a second coupling means 70.
Is connected to the machine side by. The first coupling means supplies a high frequency current to the coil 120 of the head 100 via the lead member. The second connecting means 70 is a quenching water hose 71.
1, the cooling water hose 713, and the air hose 715 are connected.

The head 100 has a support member 200 attached to the coupling 150. The support member 200 is made of a bakelite plate or the like and supports the coil 120. A jacket 210 having an injection nozzle for quenching water is attached to the support member 200, and an air nozzle 200 is also attached.

The induction hardening head 100 includes a work 10
Move relative to. The air sent to the air nozzle 220 via the hose 185 removes dust and the like on the surface of the work 10. Coil 1 via lead plate 110
The high-frequency current supplied to 20 induction-heats the surface of the work 10 to the quenching temperature. Lead plate 110, coil 1
Cooling water is supplied via a hose 183 to prevent heating of the 20. The quenching water sent to the jet nozzle via the hose 181 rapidly cools the heated work 10 to form a quenching layer. Since this induction hardening head is composed of a connecting means for supplying a high frequency current as described above and a connecting means for supplying quenching water, cooling water, air, etc. as separate bodies, a reliable connection is achieved. It can be replaced automatically. Induction hardening coil,
It is necessary to prepare various shapes according to the shape of the work. Nozzles for air and quenching water are also manufactured according to the shape of the coil, but since these coils and nozzles are integrated as a head and the entire head is replaced, the head can be automatically replaced according to the work.

12 and 13 are a side view and a plan view of an induction hardening head having coils and nozzles having different shapes. The work 10A to be hardened is, for example, a spindle of a machine tool, and forms a hardened layer on the outer peripheral portion of a cylinder. The induction hardening head 100A has a lead plate 110 and a coupling coupling 150, and a ring-shaped support member 210A is attached to the coupling 150. A ring-shaped coil 120A is attached to the inside of the support member 210A. A copper pipe 230 is provided above the coil, and cooling water is caused to flow through the copper pipe 230 to cool the coil 120A. Quenching is performed by supplying quenching water from a pipe 181 to a nozzle provided on the support member 210A.

[0014]

As described above, according to the present invention, in the induction hardening apparatus, the coil in which the high frequency current is passed, the cooling member of the coil, the quenching water jet nozzle, the air nozzle, and the like are integrally incorporated in the head side. The automatic replacement of the head is achieved by removably attaching to the head. As a means for connecting the head to the main unit side, a means for connecting a lead plate for passing a high frequency current and a coupling for water and air are provided separately, and the lead plate is sandwiched and fixed by a vise method using an air cylinder. The fluid coupling is as a one-touch joint. Therefore, the head can be reliably attached and detached mechanically including the connection of electricity and fluid. Since the induction hardening head can be automatically exchanged, the induction hardening apparatus can automatically perform setup change with respect to the change of the work, and the automatic hardening by unmanned operation becomes possible.

[Brief description of drawings]

FIG. 1 is a side view of an induction hardening apparatus for carrying out the present invention.

FIG. 2 is a side view of an induction hardening head mounting portion.

FIG. 3 is a view on arrow A of FIG.

FIG. 4 is a view on arrow B of FIG.

5 is a view on arrow C of FIG.

6 is a cross-sectional view taken along the line DD of FIG.

FIG. 7 is a detailed view of an E portion of FIG.

8 is a sectional view taken along line FF of FIG.

9 is a sectional view taken along line GG of FIG.

FIG. 10 is a side view showing a combined state of the induction hardening heads.

FIG. 11 is a plan view showing a combined state of the induction hardening heads.

FIG. 12 is a side view showing a combined state of the induction hardening heads.

FIG. 13 is a plan view showing a combined state of the induction hardening heads.

[Explanation of symbols]

 1 Induction hardening device 10 Work piece 20 Bed 30 Column 40 Cross beam 50 Saddle 60 Coupling device 100 High-frequency quenching head 110 Lead plate 120 Quenching coil 150 Coupling coupling

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Katsumura No. 1 Oji-machi, Oguchi-machi, Niwa-gun, Aichi Prefecture

Claims (2)

[Claims] 1. An apparatus for supporting a workpiece to be hardened,
In an induction hardening apparatus provided with a device for moving an induction hardening head having an induction hardening coil and an injection nozzle for quenching water relative to a work, a main body equipped with a transformer for generating a high frequency current includes a coupling device. The induction hardening head is exchangeably supported via a first connecting means for sandwiching the lead plate communicating with the hardening coil on the head side with the connecting device on the main body side, and the supply of the hardening water. An automatic exchange device for an induction hardening head, comprising a second coupling means having a coupling for mechanically coupling a coupling member on the head side with a passage coupler. 2. The induction hardening head comprises a metal joining member, a lead plate supported by the joining member via an insulating material, and an induction hardening coil joined to the lead plate.
The automatic exchange device for an induction hardening head according to claim 1, further comprising a quenching water injection nozzle supported by the joining member.