JPH089153Y2 - Turntable type induction hardening equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turntable type induction hardening apparatus of an induction hardening apparatus having a plurality of stations.

[0002]

2. Description of the Related Art A conventional induction hardening apparatus having a plurality of stations will be described below with reference to the drawings, taking non-oxidative hardening as an example. FIG. 4 is an explanatory diagram of a conventional induction hardening apparatus for performing non-oxidative quenching, in which a tank (not shown) contains a cooling liquid 1 and a cylindrical casing 2 having a cap 3 tightly covered on its top. The lower part is immersed in the cooling liquid 1. Reference numeral 7 denotes a high-frequency heating coil that surrounds the work 6 and heats the work 6. The high-frequency heating coil 7 is attached to the inside of the casing 2 by a support member (not shown), and is connected to a high-frequency power source (not shown) via a power supply line (not shown).

Reference numeral 8 denotes an inlet for the non-oxidizing or reducing gas g provided at the bottom of the casing 2. Reference numeral 8a is a gas g introduction pipe, which is connected to a gas supply source (not shown).
The gas g released into the casing 2 through the introduction pipe 8a and the introduction portion 8 is released from the gas vent hole 4 provided in the cap 3.

In the figure, a cylindrical work 6 is placed on a work receiver 9 mounted on an upper part of a support rod 5 arranged in the vertical direction. By arranging a plurality of support rods 5 in the lateral direction, and at the loading station in front of the casing 2, the support rods 5 are raised above the liquid level of the cooling liquid 1 so that the work 6 can be placed on the work receiver 9 (direction of arrow A).
The support rod 5 holding 6 is submerged in the cooling liquid 1 immediately below (direction of arrow B), and is moved to the position just below the casing 2 in the submerged state (direction of arrow C), where the work 6 is heated to casing 2 which is a heating station. The work 6 is lifted up inside and stopped with the work 6 inserted in the high-frequency heating coil 7 (in the direction of arrow D), and then the work 6 heated by the high-frequency heating coil 7 is submerged in the cooling liquid 1 again to work 6. Cooling starts (direction of arrow E), and then moves to the unloading station at the rear of the casing 2 (direction of arrow F), where it rises above the cooling liquid 1 to lift the workpiece 6 from the liquid surface.
Then, the work 6 is cooled down (arrow G direction).
The inside of the cooling liquid 1 between the heating station and the unloading station becomes the cooling station.

Further, normally, the support rod 5 is rotated in the direction of arrow H or in the opposite direction so that heating and cooling of the work 6 are made uniform. A work lifting / lowering rotation device (not shown) is provided, and this work lifting / lowering rotation device rotates the support rods in the heating station and the cooling station and lifts / lowers the support rods in the loading station, the heating station, and the unloading station. However, when the support rod is moved between these stations, the support rod is always lowered below the cooling liquid level.

[0006]

The above-mentioned induction hardening apparatus has the following problems. That is, since the work is once immersed in the cooling liquid before being heated, even if the work is heated in a non-oxidizing or reducing gas, a small amount of oxide is generated from the heated cooling liquid and the work is baked. The light brightness on the surface of the work after the insertion is reduced.

When preheating the work before heating the work, the work is preheated in a state where the work is raised above the cooling liquid level, and then the work is not lowered into the cooling liquid. Although it has to be moved to the heating position, in the above-mentioned conventional induction hardening apparatus, the work is always immersed in the cooling liquid before reaching the heating station, so the effect of preheating is lost. Japanese Patent Laid-Open No. 4-11727
Informative loading station and heating station
A shutter is installed between the
From the loading station to the heating station
Discloses a turntable type induction hardening device
Have been. This solves the above problem,
All of the multiple support rods are equipped with a lifting device using a cylinder.
Therefore, the configuration becomes very complicated.

The present invention was devised in view of the above circumstances, and is a turntable type induction hardening apparatus in which a plurality of vertical support rods having work holders are arranged at equal intervals around a turntable, It is an object of the present invention to provide a turntable type induction hardening apparatus that can move a support rod between stations, for example, from a loading station to a heating station while the support rod is locked in a raised state.

[0009]

In order to solve the above problems, a cooling liquid tank containing a cooling liquid and a cooling liquid tank
It is placed horizontally below the bottom of the tank and cools the machine room.
The turntable immersed in the effluent and the workpiece mounting work
The rack receiver is attached to the top and the turntable
The rods are vertically arranged at equal intervals around the bull and are lifted and lowered.
And multiple support rods that can be freely rotated, and turntable rotation
It is equipped with a
Support rod is loading / unloading position, heating position
The loading and unloading
At the working position, the work on the work support is on the surface of the cooling liquid.
In the heating position, the work on the work receiver receives cooling liquid.
The support rod rotates while being positioned on the liquid surface, and at the cooling position
Supports the work on the work receiver immersed in the cooling liquid
A turntable type induction hardening device with a rotating rod.
And turn the support rod on the turntable corresponding to each support rod.
Lock the rotating device to rotate and the supporting rod in the raised position.
Lock device is provided, which is located on the bottom of the coolant tank.
Load the support rod in the loading / unloading position.
Lifting device that lifts to the position where it is locked by the locking device
However, on the bottom of the tank and the machine room, the support rod
The drive source that drives the rotating device is located on the bottom of the tank and the machine room.
Is a drive source for driving the rotating device of the supporting rod in the cooling position.
However, on the bottom of the tank, there is a locking device for the support rod at the cooling position.
Each lock release device to release the lock by
The support rod rotation device allows the support rod to rotate freely.
Freely inserted and provided on the turntable
On the first bearing and the support rod on which the work receiving attachment is formed
Upper spline formed in the central part with a smaller diameter than the
Lower spline formed in the lower part of the same shape as the part, and the central part
An annular recess formed between the lower parts and smaller in diameter than both splines
Part, the second bearing fitted on the lower part of the first bearing, and the support rod.
When rising, it engages the lower spline and the supporting rod descends.
Installed on the inner surface so that it will engage with the upper spline when
Gear internal gear, external gear provided on outer peripheral surface, and second bearing
A ring formed by projecting between the inner and outer peripheral surfaces so that
A first gear having a second bearing holding portion of the support
The drive source that drives the rotating device of the rod meshes with the external gear.
Rotation of the second gear and the second gear that together drive the first gear
A drive mechanism, and the locking device is provided in the direction of the support rod.
When the support rod is urged and the support rod is raised, the tip portion of the support rod is
Fits freely in the recess to lock the vertical movement of the support rod.
The pin and this pin are slidably accommodated
The pin case attached to the lower surface and the pin
Longitudinal rack and mesh with this rack
A pinion rotatably supported on the pin case, and
And a lever for rotating the pinion, the lock solution
The removing device displaces the lever to move the lever at the tip of the pin.
Remove the fitting from the recess and lower the support rod by gravity.
I am trying to do it.

The ascending means comprises a rod for pushing up the lower part of the support rod and a cylinder for advancing and retracting the rod, and the lock release device pushes up the lever and pushes the pin through the pinion and the rack. It may be provided with a rod for removing the tip portion from the recess and a cylinder for moving the rod forward and backward.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are drawings for explaining the present embodiment, FIG. 1 is a side sectional view of a part of a rotating device of a supporting rod, a lock device and a lock releasing device, and FIG. FIG. 3 is an explanatory plan view.

In the present embodiment, a turntable type induction hardening device capable of hardening the tooth surface of a work W which is a spur gear (hereinafter, the turntable type induction hardening device of the embodiment is referred to simply as a hardening device). Will be described). The quenching apparatus is provided with a non-oxidizing or reducing gas supply source, a heating chamber filled with gas from the supply source, a high-frequency heating coil provided in the heating chamber, and the heating chamber. the workpiece W carry, can be used as a turntable-type induction hardening apparatus for performing non-oxidizing hardening by providing a shutter or the like for carrying out (all not shown) to.

In this quenching apparatus, a horizontally arranged turntable 10 and a work receiver 30 on which a work is placed are attached to the upper part, and a plurality of vertical (around the turntable 10 are arranged at equal intervals). (In this embodiment, four support rods 20), support rod 20 rotation device 100, support rod 20 raising device 110, support rod 20 locking device 300, and support rod 20 unlocking lock. Device 310 and turntable
A turntable rotating device 400 for rotating 10 in an intermittent and stepwise manner, and the turntable 10 and the rotating device 100 described above.
A casing 900 accommodating the lock device 300, the lock release device 310, and the turntable rotation device 400 is provided.

The provision of four support rods 20 means that one cycle of quenching work is carried out over four stations. As shown in FIG. 3, the turntable 10 is stepwise, in the direction of arrow A. As the work W is rotated, the work W is placed on the work receiver 30 or removed from the work unloading station L.
U, a heating station H in which a work W is heated by a high-frequency heating coil (not shown), a first cooling station C1 in which the work W is immersed and cooled in a cooling liquid L, and also a work W is immersed in the cooling liquid L. The quenching is completed by passing through the second cooling station C2 where cooling is continued.

A casing bottom 911 divides the inside of the casing 900 into a cooling liquid tank 910 containing the cooling liquid L and a machine room 920 below the cooling liquid tank 910. 92
1 is the bottom of the machine room 920. Rotating device 100 for supporting rod 20
Are provided in the coolant tank 910 and the machine room 920, and the rotating device 400 of the turntable 10 is provided in the machine room 920.

The lifting device 110 for the support rod 20 includes a rod 111 that pushes up the support rod 20 from below and raises it.
An air cylinder 112 for moving the 111 forward and backward is provided. The air cylinder 112 is attached to the lower surface of the tank bottom surface 911, and the rod 111 penetrates the tank bottom surface 911 in a liquid-tight manner.

The rotating device 100 for the support rod 20 is composed of the support rod 2
No. 0 is slidably and rotatably inserted, and the first bearing 120 provided on the turntable 10 and the work receiver
Medium diameter smaller than the upper part of the support rod 20 on which the mounting portion 21 is formed
The upper spline 22 formed in the center and the same diameter as the center
Lower spline 23 formed in the lower part and between the central part and the lower part
The small-diameter annular recess 24 and from both splines 22 and 23 formed, and a second bearing 130 is fitted around the ball bearing in the lower portion of the first bearing 120.

The first bearing 120 is a substantially cylindrical bearing body 121.
And a substantially cylindrical bushing 123. Bearing body 12
1 is inserted into the opening 11 of the turntable 10 and includes a bolt 122 and a nut 12 screwed onto the outer peripheral surface of the bearing body 121.
It is fixed to the turntable 10 by 7 and. 126
Is a washer for nut 127.

The bushing 123 is inserted between the bearing body 121 and the support rod 20 and attached to the bearing body 121 by bolts 124. The bushing 125 is inserted and fixed to the lower inside of the bearing body 121. The bushings 123 and 125 both serve as guides for the vertical movement of the support rod 20.

The rotating device 100 for the support rod 20 also externally fits the internal gear 141 provided on the inner peripheral surface so as to mesh with the splines 22 and 23, the external gear 142 provided on the outer peripheral surface, and the second bearing 130. With the annular second bearing holding portion 143 formed so as to project between the inner peripheral surface and the outer peripheral surface.
The gear 140 is provided. In addition, the second gear 142 bites
A second gear 150, which in combination drives the first gear 140,
The rotation drive mechanism 160 for the two gears 150 and the rotation device 10
It constitutes a drive source for driving 0. The rotating device 100
Equipped on the support rod 20 attached to the turntable 10
On the other hand, a drive source for driving the rotating device 100
Are attached to the bottom surface 911 of the tank.

The rotary drive mechanism 160 for the second gear 150 is
A horizontal pulley 161, which is fixed coaxially with the gear 150 and is supported by a member (not shown) from the tank bottom 911, and a pulley 163 that drives this pulley 161 via a belt 162.
And the bearing for the shaft 164 of the pulley 163, which is the bottom of the tank 911.
Bearings 165 and 166 provided above and below the shaft 164, a pulley 167 attached to the lower end of the shaft 164, a pulley 169 that drives the pulley 167 via a belt 168, a speed reducer 170 that drives the shaft of the pulley 169, and a speed reducer. Motor 17 driving device 170
It has 1 and. The speed reducer 170 and the motor 171 are connected to the heating station H, pulleys 161, 163 for the first cooling liquid station C1 and the second cooling liquid station C2, and
Common to 167.

The locking device 300 of the support rod 20 is biased by the spring 307 in the direction of the recess 24 of the support rod 20 so that the tip portion 302 is fitted into the recess 24 of the support rod 20 so as to be freely fit. 301 that locks the vertical movement of the pin 301 and a pair of annular third bearings 30 that support the pin 301 slidably in the longitudinal direction thereof.
5, a pin case 306 that houses the pin 301 and the third bearing 305 and is fixed to the lower surface of the turntable 10, a rack 303 that is formed on the pin 301 in the longitudinal direction of the pin 301, and a rack.
It has a pinion 304 that is rotatably supported by a pin case 305 that meshes with 303, and a lever 308 that is connected to the shaft of the pinion 304 and that rotates the pinion 304.

The lock release device 310 of the support rod 20 is a lever.
A rod 311 that pushes up 308 and an air cylinder 312 that moves the rod 311 up and down are provided.

For each support rod 20, the rotating device 1 described above is used.
00 and locking device 300 are provided. Also,
In the loading / unloading station LU,
An elevating device 110 for the supporting rod 20 is provided, and the heating device H drives the rotating device 100 for the supporting rod 20 .
A driving source and an unlocking device 310 are provided. Further, the first and second cooling stations C1 and C2 are provided with drive sources for driving the rotating device 100 of the support rod 20.

The turntable rotating device 400 includes a known Geneva mechanism 410 and a drive unit 420 for the Geneva mechanism 410. The drive device 420 includes a gear 422 coupled to the output side of a reduction gear 421 driven by a Geneva mechanism drive motor (not shown) and a gear 42 meshed with the gear 422.
3 and a Geneva mechanism driving cam (not shown) fixed to the shaft of the gear 423. 424 is the gear 423
Bearing.

Next, the operation of this embodiment will be described. First,
The work receivers 30 are attached to the work receiver attachment portions 21 of all the support rods 20. The Geneva mechanism driving motor is activated to intermittently drive the Geneva mechanism. That is, the turntable 10
Makes a stepwise rotation. In addition, when the motor 171 is started, the motor 171 turns the reducer 170, the pulley 169, and the belt.
168, shaft 164, pulley 163, belt 162 and pulley 16
Rotate the second gear 150 via 1.

When the supporting rod 20 arrives at the loading / unloading station LU, the air cylinder 112 operates to raise the rod 111, and the tip of the rod 111 is supported by the supporting rod 20.
And the lower spline 23 meshes with the internal gear 141 of the first gear 140. At this time, the tip portion 30 of the pin 301 is urged toward the support rod 20 by the spring 307.
Since 2 is fitted in the recess 24 of the support rod 20, the support rod 20 is locked in the raised position. Therefore, the work W is placed on the work receiver 30 manually or by a manipulator.

When the supporting rod 20 in the state where the turntable 10 is rotated by one step and is raised reaches the heating station H,
Since the first gear 140 meshes with the second gear 150, the support rod 20
Rotates. That is, the work W starts rotating. And
The work W is heated by a high-frequency heating coil (not shown). When the heating of the work W is completed, the lock release device 31
The 0 air cylinder 312 operates and the rod 311 rises,
The tip of the rod 311 pushes up the lever 308, so that the pinion 304 rotates and moves the pin 301 in a direction away from the support rod 20 via the rack 303.

Then, the tip portion 302 of the pin 301 is supported by the support rod.
Since the support rod 20 is disengaged from the recess 24, the support rod 20 descends by gravity until the work receiving attachment portion 21 of the support rod 20 comes into contact with the upper surface of the bushing 123 of the first bearing 120.
Is dropped below the liquid surface 912 of the cooling liquid L and immersed in the cooling liquid L. At this time, the upper spline 22 moves the first gear 140
Since it meshes with the internal gear 141 of the
Keeps spinning.

When the turntable 10 rotates for the next one step, the work W immersed in the cooling liquid L reaches the first cooling station C1 and the first stage cooling is performed. When the turntable 10 further rotates one step, the work W reaches the second cooling station C2 and the second stage cooling is performed to complete the quenching. The rotation of the work W continues at the first and second cooling stations.

When the turntable 10 is rotated by the next one step, the work W reaches the loading / unloading station LU and the rotation of the work W is stopped. here,
When the air cylinder 112 operates and the rod 111 rises,
The tip portion 302 of the pin 301 is fitted into the recess 24 of the support rod 20 so that the support rod 20 is locked in the raised state. In this state, the hardened work W on the work receiver 30 is removed, and the next work W that has not been quenched is placed on the work receiver 30. After that, the next work W is quenched in the same manner as described above.

[0032]

As described above, the turntable-type induction hardening apparatus of the present invention is a turntable-type induction hardening apparatus in which a plurality of vertical support rods having work holders are arranged around the turntable at equal intervals. In the insertion device, the support rod can be locked in the raised state by fitting the tip end portion of the pin in a recess provided in the support rod so as to be freely fit. In addition, the lock release device and the support rod
A station is provided on the side of the station . Therefore, it is possible to move the support rod between the stations, for example, from the loading / unloading station to the heating station while the support rod is locked in the raised state. Of course, it will not be immersed , and each support rod will have a lifting device.
There is no need to provide it, and the number of lifting devices for the supporting rod is greatly increased.
Very simple device configuration due to reduction
Becomes

Further, since upper and lower splines are formed on the support rod, and the support rod is rotationally driven through a gear meshed with the spline, the rotational drive and the vertical movement of the support rod are independent of each other. along with the done Ru Te, above the support rod
Heating station raised and cooling with support rod lowered
Work can be easily rotated at both stations .

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing a part of a rotating device, a locking device and an unlocking device according to an embodiment of the present invention.

FIG. 2 is a front explanatory view.

FIG. 3 is an explanatory plan view.

FIG. 4 is an explanatory view of a conventional induction hardening apparatus.

[Explanation of symbols]

 10 Turntable 20 Support rod 21 Work receiving mount 22 Upper spline 23 Lower spline 24 Recess 100 Rotating device 110 Lifting device 111 Rod 112 Cylinder 120 1st bearing 130 2nd bearing 140 1st gear 141 Internal gear 142 External gear 143 1st 2 Bearing holding part 150 Second gear 160 Rotation drive mechanism 300 Lock device 301 Pin 302 Tip part 303 Rack 304 Pinion 306 Pin case 308 Lever 310 Lock release device 311 Rod 312 Cylinder 400 Turntable rotation device W Work

Claims (2)

[Scope of utility model registration request] 1. A cooling liquid tank containing a cooling liquid, and cooling
Arranged horizontally with the machine room below the bottom of the liquid tank
Turntable immersed in cooling liquid and work
While the work receiver to put on is attached to the top
In the form of rods that are vertically arranged at equal intervals around the turntable
In addition, a plurality of support rods that can be raised and lowered and rotated, and a turntable
Equipped with a cable rotation device for intermittent rotation of the turntable
More supporting rods are loading and unloading positions
Position, heating position, and cooling position in sequence
At the loading position, the workpiece on the workpiece receiver is the cooling liquid.
Located on the liquid surface of the
When the support rod rotates while the
At the return position, the workpiece on the workpiece receiver was immersed in the cooling liquid.
Turntable type induction hardening equipment in which the supporting rod rotates in the state
In the installation, the turntables are rotated on the turntable in correspondence with each support rod.
Lock the rotating device and the supporting rod in the raised position.
Is installed on the bottom of the coolant tank.
Lock the support rod at the loading / unloading position
The lifting device that raises the device to the locked position
The bottom of the tank and the machine room are equipped with a rotating
The drive source that drives the equipment cools the bottom of the tank and the machine room.
The drive source that drives the rotating device of the supporting rod in the position is
The bottom of the lock is locked by the locking device of the support rod at the cooling position.
A lock release device for releasing the lock is provided, and the support rod rotation device is such that the support rod is slidable and rotatable.
First shaft inserted and provided on the turntable
From the top of the support rod with the support and the work support mounting part
The upper spline formed in the center of the small diameter is
The lower spline formed at the bottom of the shape and the center and bottom
An annular recess formed between and having a diameter smaller than both splines,
The second bearing fitted under the first bearing and the support rod are
When the support rod is engaged with the lower spline and descends,
The inner surface provided so that it meshes with the upper spline.
External fitting of surface gear, external gear provided on the outer peripheral surface, and second bearing
Second annular member formed between the inner peripheral surface and the outer peripheral surface so as to protrude.
A first gear having a bearing holder, and a drive source for driving the rotation device of the support rod is the outer tooth.
A second gear that meshes with the vehicle and drives the first gear, and a second tooth
A vehicle rotation drive mechanism, and the locking device is urged in the direction of the support rod to raise the support rod.
When lifted, the tip part is freely fitted into the concave part of the support rod.
Together with the pin that locks the vertical movement of the support rod,
Slidably accommodated and mounted on the bottom of the turntable
Formed in the longitudinal direction of the pin with a pin case
The rack and the pin case that engages with this rack
A pinion rotatably supported and this pinion can be rotated.
The lock release device is configured to displace the lever and move the lever tip.
Remove the fitting of the end part to the recess and use the support rod by gravity.
A turntable type induction hardening device characterized by lowering . 2. The raising means includes a rod that pushes up a lower portion of a support rod and a cylinder that advances and retracts the rod, and the lock release device pushes up the lever so that a pin is moved through a pinion and a rack. The turntable type induction hardening apparatus according to claim 1, further comprising a rod for removing a tip portion from the recess and a cylinder for moving the rod forward and backward.