JP2652739B2 - High frequency induction hardening equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency induction hardening apparatus for simultaneously heating and quenching four corners of a prismatic work having a substantially square cross section by direct energization and induction current.

[0002]

2. Description of the Related Art Conventionally, in order to harden four corners of a prismatic work having a substantially square cross section such as a slide rail, a high-frequency energizing induction hardening device using both direct energization and induction current, or induction. High frequency induction hardening devices using only electric current are used. FIG. 6 shows quenching by the high-frequency induction hardening device, and FIG. 7 shows quenching by the high-frequency induction hardening device. The prismatic work W is a slide rail, and U-grooves into which balls are fitted are provided on two surfaces sandwiching the apex angles of the four corners.

[0003] In the quenching by a high-frequency current induction hardening device,
A linear derivative 51 extending along the corner of the prismatic work W is used. The derivative 51 is a conductive cylinder having an L-shaped cross section, and a quenching liquid is supplied inside. One end of the derivative 51 is pressed against two surfaces sandwiching the apex of the corner. A portion excluding one end of the derivative 51 faces two surfaces sandwiching the apex of the corner at a predetermined interval, and a large number of quenching liquid ejection holes are opened on each of the facing surfaces. The other end of the derivative 51 is connected to one terminal of a high-frequency power supply 53. An L-shaped electrode 52 is provided at the other end of the derivative 51 at a slight interval. The electrode 52 is pressed against two surfaces sandwiching the apex of the corner. Electrode 52
Is connected to the other terminal of the high-frequency power supply 53.

At the time of quenching, a high frequency power supply 53 is operated. Accordingly, a high-frequency current flows through the dielectric 51, the corner of the prismatic work W, and the electrode 52. The high-frequency current flowing through the corner portion directly heats the corner portion, and the high-frequency current flowing through the derivative 51 causes
A high-frequency current is induced in the corner, and the induced current also heats the corner. When the corner is heated to a predetermined quenching temperature, a quenching liquid is supplied into the inside of the derivative 51. Thereby, the quenching liquid is sprayed on the two surfaces sandwiching the apex of the corner, and the quenching is completed.

In the quenching by the induction hardening device, FIG.
As shown, a rectangular coil 54 is used. The four corners of the coil 54 are close to the four corners of the prismatic work W, and the other parts are away from the surface of the prismatic work W. At the time of quenching, the coil 54 is moved in the longitudinal direction of the prismatic work W while operating the high-frequency power supply connected to the coil 54. Thereby, the four corner portions of the prismatic work W are simultaneously heated. After the heating, a quenching liquid is sprayed from the liquid injector (not shown) to the four corners, and the quenching is completed.

[0006]

In the quenching by the former high-frequency induction induction quenching device, the corner surface of the prismatic work W is preferably quenched. However, quenching the four corners in order takes time and effort, and furthermore, the distortion of the prismatic work W becomes a serious problem. On the other hand, in the latter quenching by the induction induction quenching device, the four corners are simultaneously heated, but the heating is performed while moving the coil, so that the workability is also poor. In addition, there is a disadvantage that the top part of the corner part is particularly easy to overheat or the quenching layer becomes deeper than necessary. Remains.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to simultaneously and efficiently quench four corners of a prismatic work with high quality by conducting electricity, and suppress distortion of the prismatic work. It is an object of the present invention to provide a high-frequency current induction hardening device capable of performing the above-described operations.

[0008]

According to the present invention, there is provided a high-frequency energizing induction hardening apparatus according to the present invention, in which four corner portions of a prismatic work having a substantially rectangular cross section (hereinafter, the prismatic work is simply referred to as a work) are directly energized. a high-frequency current induced hardening apparatus for quenching co heated by the induction current, a fixed base, a movable base which is tangent Hanaredo opposite thereto, both base
A pair of fixed-side insulators having a substantially L-shaped cross section, and a pair of fixed-side electrodes provided on the fixed base so as to face each other along the longitudinal direction of the work horizontally inserted between the bases; Is provided on the movable base so as to face along
A pair of movable-side derivatives having a substantially L-shaped cross section, and a pair of movable-side electrodes are provided, and the pair of fixed-side derivatives extend along a corner portion of the work facing the fixed base side. , Quenching fluid is supplied inside and fixed base
Quenching the two sides of the corner of the work facing the side
A quenching liquid ejection hole for injecting the liquid is provided ,
It is supported so that it can tilt in the direction
In addition, at one end of the fixed side derivative, the apex angle of the corner
A pair of contacts that are in contact with two surfaces sandwiching the
A pair of fixed side electrodes are provided at the other end of each fixed side derivative.
Leave the fixed base at a slight distance from the fixed side derivative.
And a pair of contactors that are in contact with two surfaces sandwiching the apex angle of the corner portion, and the pair of movable-side conductors are provided with a core of a work facing the movable base side. > The quenching liquid is supplied to the inside and the apex angle of the corner of the workpiece facing the movable base side.
A quenching liquid ejection hole for injecting the quench liquid is provided on the two sandwiching surfaces.
It is supported so that it can tilt in the direction of pressing the upper surface of the work.
A contact pair is provided to contact two surfaces sandwiching the vertex angle of the
And the pair of movable electrodes is formed of each movable derivative.
At the other end, slightly spaced from the movable side derivative
And a pair of contacts that are provided on the movable base and that come into contact with two surfaces sandwiching the apex angle of the corner portion. Is provided on the movable base so that
And a pair of movable electrodes having a substantially L-shaped cross section.
And the pair of fixed-side derivatives extend along two adjacent corners of the prismatic work, and the quenching liquid is supplied to the inside and sandwich the apex angle of the corner. Opposite to the two surfaces, a quenching liquid ejection hole is provided on the opposing surface, and the lower surface of the inserted prismatic work is
A pair of contacts that are supported so as to be tiltable in the direction of pressing and that are in contact with two surfaces sandwiching the apex angle of the corner of the prismatic work are provided at one end. provided on the fixed base at a slight distance from the Oite stationary derivative to the other end of derivatives, said prismatic
Is tiltably supported in the direction for pressurizing the lower surface of the workpiece, further, is contact pair is provided in contact with the two faces sandwiching the apex angle of the corner portion of the prism-shaped workpiece, the pair of movable
The derivative extends along the other two corners of the prismatic work, is supplied with a quenching liquid therein, and faces the two surfaces sandwiching the apex of the corner, and burns the opposite surface. An inlet for injecting liquid is provided, and the upper side of the prismatic work is further provided.
A pair of contacts that are supported so as to be tiltable in the direction of pressing the surface and that comes into contact with two surfaces sandwiching the apex angle of the corner of the prismatic work at one end are provided , and the pair of movable electrodes are
Provided on the movable base at a <br/> slight distance from the Oite movable derivative to the other end of the movable derivatives, the angle
The columnar work is supported so as to be tiltable in a direction of pressing the upper side surface, and further provided with a pair of contacts for contacting two surfaces sandwiching the apex angle of the corner of the prismatic work.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a high-frequency current induction hardening device embodying the present invention, FIG. 2 is a view taken along line A in FIG. 1, FIG. 3 is a view taken along line B in FIG. 1, and FIG. FIG. 5 is a view of FIG.
FIG.

The high-frequency current induction hardening apparatus includes a horizontal fixed base 1 made of an insulating material and a movable base 2 supported horizontally above the fixed base. The movable base 2 is made of an insulating material like the fixed base 1, and is driven up and down by a cylinder 3. The prismatic work W to be subjected to the quenching process is, for example, a slide rail having a substantially square cross section, and is set horizontally between the fixed base 1 and the movable base 2 with two opposing surfaces facing up and down. I have.

On the fixed base 1, there are provided a pair of fixed-side derivatives 4, 4 which are horizontally arranged in parallel. Each fixed-side dielectric 4 is formed of a conductive cylinder having a substantially L-shaped cross section, and one of the two inner surfaces is substantially opposed to the lower portion of the outer surface of the prismatic work W over substantially the entire length, and the other inner surface is The outer surface of the lower surface of the prismatic work W is substantially entirely opposed. A large number of ejection holes 4a for ejecting the quenching liquid are formed on both opposing surfaces, and an introduction pipe 5 for introducing the quenching liquid into the fixed side dielectric 4 is provided on the outer surface. Installed.

Each fixed-side derivative 4 is supported at both ends by support arms 6 and 7. Fixed derivative 4
As shown in FIG. 2, the lower end of the support arm 6 supporting one end of the support arm 6 is rotatably pivoted by a pin 46 on a support base 8 on the fixed base 1 so as to change the interval between the fixed side guides 4 and 4. Supported.

A pair of contacts 9 and 10 are provided on one end surface of the fixed side derivative 4. As shown in FIG. 5, each contact is attached to the fixed side dielectric 4 by a bolt 11, and a washer 43 and a disc spring 44 are interposed in the attachment portion. The base end of each contact is formed round so that the contact can rotate. One contact 9 is a prismatic work W
The other contact 10 comes into contact with the lower portion of the outer surface of the lower end of the end of the prismatic workpiece W. Due to these contacts, between the fixed side dielectric 4 and the prismatic workpiece W,
A predetermined interval is secured.

The support arms 6, 6 are urged outward by springs 12, 12 so that the interval between the corresponding contacts 9, 9 is wider than the lateral width of the prismatic work W, and outward. It is fixed by stoppers 13 and 13 so as not to fall down.

As shown in FIG. 3, the lower end of a support arm 7 supporting the other end of the fixed side dielectric 4 is rotatably supported by a pin 15 on a side of a conductor 14 mounted on the fixed base 1. Have been. Then, the support arm 7 and the pin 15
Are also conductors. In other words, the fixed derivatives 4 on both sides,
4 is electrically connected at the other end. A lead 16 extends from the lower surface of the conductor 14 to below the fixed base 1, and the tip is connected to one terminal of a high-frequency power supply 17.

At the other end of each of the fixed-side derivatives 4 and 4, fixed-side electrodes 18 and 18 are arranged at a slight interval. As shown in FIG. 4, the fixed-side electrode 18 has a substantially L-shape, which is the same as the cross-sectional shape of the fixed-side dielectric 4, and has a pair of contacts 19 and 20 attached thereto, similarly to one end of the fixed-side dielectric 4. Similarly to the other end of the fixed side dielectric 4, it is supported by a support arm 21, and the lower end is rotatably supported by one side of a conductor 22 mounted on the fixed base 1 by a pin 23. I have. The support arm 21 is urged outward by a spring 24 so that the interval between the contacts 19, 19 is wider than the lateral width of the prismatic work W.
The lead 2 extends from the conductor 21 below the fixed base 1.
5 is extended. Reference numeral 42 denotes a stopper for preventing the support arm 21 from tilting outward.

The movable base 2 and its attachment mechanism are configured such that the fixed base 1 and its attachment mechanism are turned upside down. Briefly, on the lower surface of the movable base 2, a pair of movable derivatives 26, 26 and a pair of movable electrodes 27,
27 are attached. The movable side dielectric 26 is supported by pivotable support arms 28 and 29, and a pair of contacts 30 and 31 are bolted to one end surface. The support arm 28 is attached to a support base 45 and is urged outward by a spring 32. The conductor 33 connecting the other ends of the movable-side conductors 26, 26 is connected to the other terminal of the high-frequency power supply 17 by a lead. Lead 34
Is divided on the way to allow the movable base 2 to move up and down, and a contact point 35 is interposed at the divided portion.

The movable-side electrode 27 is provided on the rotating support arm 3.
6 and a pair of contacts 37 and 38 are bolted. The support arm 36 is urged outward by a spring 39. The conductor 40 connecting the fixed electrodes 27, 27 is connected to the conductor 22 connecting the fixed electrodes 18, 18 by a lead 25. The lead 25 is also divided on the way to allow the movable base 2 to move up and down, and a contact 41 is interposed at the division.

In order to quench the corners of the prismatic work W with the high-frequency current induction hardening apparatus, first, the movable base 2 is raised and moved away from the fixed base 1. In this state, the prismatic work W is horizontally laid and inserted between the fixed base 1 and the movable base 2, and the lower four corners of the prismatic work W are supported by the upper surfaces of the contacts 10, 10, 20, and 20. I do. Next, the cylinder 3 is operated to lower the movable base 2. By lowering the movable base 2, the lower surfaces of the contacts 31, 31, 38, and 38 come in contact with the four corners of the upper surface of the prismatic work W. Further, by lowering the movable base 2, the fixed-side derivatives 4 and 4, the fixed-side The electrodes 18, 18, the movable-side dielectrics 26, 26, and the movable-side electrodes 27, 27
Each of them closes inward against the pressing force of 2,24.

As a result, the contacts 9, 9 are provided at the lower portions on both sides of one end of the prismatic work W, and the contacts 10, 10 are provided at the lower portions on both sides.
Are pressed against each other by the cylinder force. In addition, the contact 19, the lower part of both sides of the other end of the prismatic work W,
The contact 19 is pressed against the lower surface on both sides by the cylinder force. Further, the contacts 30, 30 are also provided on the upper portions of both sides of one end of the upper portion of the prismatic workpiece W.
The contacts 31, 31 are respectively pressed against both sides of the upper surface by a cylinder force, and the contacts 3 are placed on the upper sides on both sides at the other end.
The contacts 37 are pressed against the upper surface on both sides by the cylinder force.

As described above, in the present high-frequency current induction hardening apparatus, only the movable base 2 is depressed by the cylinder 3 so that the fixed-side insulators 4 and 4 and the fixed-side electrodes 18 and 18 are provided at the four corners of the prismatic work W. , Movable side derivative 26,2
6. The movable electrodes 27, 27 are electrically connected. At this time, each of the contacts rotates around the base to bring the distal end surface into surface contact with the surface of the prismatic work W.

Fixed derivatives 4,4 on prismatic workpiece W,
When the connection of the fixed-side electrodes 18, 18, the movable-side conductors 26, 26, and the movable-side electrodes 27, 27 is completed, the split part of the lead 25 is connected by the contact 41, and the split part of the lead 34 is connected by the contact 35, respectively. The power supply 17 is operated. As a result, a high-frequency current flows in the longitudinal direction of the fixed-side dielectrics 4 and 4 and the movable-side dielectrics 26 and 26, and a high-frequency current flows in the four corners of the prismatic workpiece W. As a result, each of the corners is energized and heated, and is also induction-heated by the high-frequency current induced by the high-frequency current flowing through the dielectric. Thus, the four corner portions of the prismatic workpiece W are simultaneously heated as a whole, and the distortion is suppressed.

When the four corners of the prismatic workpiece W are heated to a predetermined quenching temperature, the operation of the high-frequency power supply 17 is stopped, and at the same time, each of the fixed-side derivatives 4, 4 and the movable-side derivatives 26, 26 Inject quench liquid into the interior. Thereby, quenching is spouted from the spout holes provided on each of the two inner surfaces, and each corner is quenched. The distortion of the prismatic workpiece W can also be suppressed by adjusting the amount of the quenching liquid injected into the four derivatives.

Even if the dimensions of the prismatic workpiece W change, the positions of the support holes 8, 45 and the pin holes formed in the conductors 14, 33, 22, 40 are changed to change the positions of the pins 46, 15, 2.
It can be easily dealt with by replacing 3, 47, 48, 49. Further, when heating a large-sized work, by providing water cooling holes in these pins and passing water through, heat generation of the pins can be suppressed, and high-output heating can be performed.

Further, the fixed base 1 can be moved up and down.

[0026]

As described above, the high-frequency current induction hardening apparatus according to the present invention uses a pair of fixed-side conductors, fixed-side electrodes, movable-side conductors, and movable-side electrodes to form a prismatic shape. The four corners of the work can be heated and quenched simultaneously. In addition, since the heating is simultaneous heating in the longitudinal direction, the prismatic work is hardly distorted, and the distortion can be further suppressed by adjusting the amount of the quenching liquid supplied to the fixed-side derivative and the movable-side derivative. it can. Also,
Since the fixed-side derivative and the fixed-side electrode were attached to the fixed base, and the movable-side derivative and the movable-side electrode were attached to the movable base, and these were tiltably supported inward,
Fixed side dielectric on prismatic work only by movement of movable base,
The fixed-side electrode, the movable-side dielectric, and the movable-side electrode can be connected. Therefore, the four corner portions of the prismatic work can be simultaneously and efficiently quenched with high quality by conducting electricity, and the distortion of the prismatic work can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a high-frequency current induction hardening device embodying the present invention.

FIG. 2 is a view taken in the direction of the arrow A in FIG. 1;

FIG. 3 is a view on arrow B of FIG. 1;

FIG. 4 is a view taken in the direction of the arrow C in FIG. 1;

FIG. 5 is a view taken in the direction of the arrow D in FIG. 2;

FIG. 6 is a perspective view showing a conventional quenching method for a corner portion of a prismatic work.

FIG. 7 is a front view showing another conventional quenching method.

[Explanation of symbols]

 Reference Signs List 1 fixed base 2 movable base 3 cylinder 4 fixed-side dielectric 9,10 contact 12 spring 17 high-frequency power supply 18 fixed-side electrode 19,20 contact 26 movable-side dielectric 27 movable-side electrode 30,31 contact 32 spring

Claims (2)

(57) [Claims] 1. A prismatic work having a substantially square cross section.
(Hereinafter, simply referred to as a work prismatic workpiece) a high-frequency current induced hardening apparatus for quenching co heated by direct current and induced current four corners of the fixed base, and opposed to the contact A movable base to be displaced and a pair of substantially L-shaped fixed-side derivatives provided on the fixed base so as to face each other along the longitudinal direction of the work horizontally inserted between the bases. And a pair of fixed-side electrodes, a pair of movable-side derivatives having a substantially L-shaped cross section provided on the movable base so as to face each other along the longitudinal direction of the work, and a pair of movable-side electrodes. And the pair of fixed side derivatives face the fixed base side.
Extending along the corners of the workpiece to be quenched, the quenching liquid is supplied inside, and the core of the workpiece facing the fixed base side.
Of quenching liquid to inject quenching liquid to two sides of the vertex
An outlet hole is provided, and is supported so as to be tiltable in a direction of pressing the lower surface of the work, and one end of the fixed side dielectric is provided.
The part is in contact with two surfaces sandwiching the apex of the corner.
An armature pair is provided, and the pair of fixed-side electrodes
At the other end of the fixed-side derivative,
At the same time as being provided on the fixed base
A pair of contacts that are in contact with two surfaces sandwiching the apex angle of the corner portion, and the pair of movable-side conductors is a wire facing the movable base side.
Extends along the corner portion of the over-click, the baked liquid inlet is supplied into the corner portion of the workpiece which faces the movable base side
Quenching liquid jets that inject quenching liquid into two surfaces
It is provided and is supported so as to be tiltable in the direction of pressing the upper surface of the work, and is attached to one end of the movable side derivative.
Is a contact that comes in contact with the two sides of this corner
A pair is provided, and the pair of movable electrodes are each movable.
At the other end of the side derivative,
Along with being provided on the movable base at intervals,
RF power induction hardening and wherein the contact pair in contact with the two faces sandwiching the apex angle of the corner portion in which disposed. 2. The method according to claim 1, wherein the contact is rotatable.
The high-frequency current induction hardening device according to claim 1 .