JPS641947Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a positioning device for an induction heating device for surface hardening, tempering, etc. of flanged members frequently used in various types of machinery.

(Prior Art) As a type of induction heating device that heats the R part of a flanged member or the R part and the shaft part connected thereto, as shown in FIG. 3, the tip of a rod 11 of a fixed hydraulic cylinder, etc. A saddle 2 on which a current transformer is mounted is pivotally mounted to the heating coil C connected to the current transformer, and the heating coil C is connected to the hydraulic cylinder etc. 1.
There is a device that heats a flanged member W supported by the center shafts 3 by displacing the rod 11 as it moves forward and backward by the drive of the rod 11.

By the way, when heating this kind of member, the gap between the outer periphery of the shaft of the flanged member W and the inner diameter of the coil of the heating coil C must of course be set to a predetermined value. If heating is not performed while maintaining a predetermined gap between the end face fr of the flange F, which is connected to the end face fr, and the end face cr of the heating coil C, which is opposite to this, the heating effect of bringing the R part to a predetermined temperature to a predetermined depth will not be possible. I can't get it.

The conventional positioning method for setting a predetermined distance between the opposing end faces fr and cr of the flange F and the heating coil C when using the induction heating device is as follows:
For example, in this case, the reference end surface of the flanged member W is the flanged portion F.
If the outer end surface fs is the outer end surface fs, a predetermined heating effect can be obtained when the end surface cr of the heating coil C takes a predetermined distance α from the reference end surface fs of the flanged member W supported on the center shafts 3, 3. Then, the most advanced position of the rod 11 is the position where the end face cr of the heating coil C, which is displaced in response to the advance of the rod 11 operated by the hydraulic cylinder etc. 1, reaches a predetermined distance α from the reference plane fs. If the flanged member W supported by the center shafts 3, 3 is supported in the opposite direction to that shown in the diagram, the most retracted position of the rod 11 is set in advance so that it takes the same relationship as above. The positioning was done as per the settings.

(Problem to be solved by the invention) Although the shape of the flanged member W is of course done using the reference plane as a reference, it is used to support the flanged member W by the center shafts 3 during heating. There is a machining error in the depth of the center hole 4, for example, an error of about 1 mm is not uncommon. Therefore, when heat treating a large number of members, it is necessary to
Errors occur in the heating coil C, and the gap between the end face cr of the heating coil C and the end face fr of the flange F is not constant, and in induction heating, where the size of the gap has a subtle effect, the heating effect varies, resulting in a large number of problems. It was not possible to heat-treat all of the components uniformly and with high precision, and countermeasures had to be taken.

(Purpose of the invention) The present invention was made with the purpose of solving the problems existing in the conventional positioning method described above. To provide a positioning device in an induction heating device that can similarly heat uniformly and with high precision even if the flanged member is different, as long as the gap between the heating coil and the R section is kept under the same heating conditions. It is.

(Structure of the invention) The structure of the invention is as follows: (1) A heating coil that heats the surface of the R part, which is the connecting part between the flange part and the shaft part of the flanged member, or the R part and the shaft part, is attached to a hydraulic cylinder or the like. In a device connected to a current transformer placed on a saddle that is pivotally attached to the tip of a rod and can move forward and backward, (2) a detector fixed near the connection between the heating coil and the current transformer; and (3) a cylinder lock device that can instantaneously stop the forward or backward movement of the rod, which is attached to a predetermined position of the rod such as the hydraulic cylinder, and (4) the tip of the probe of the detector and a flange. (5) Setting a gap between the end face of the flange part continuing to the R part of the member and the end face of the induction heating coil opposite, and (5) setting the cylinder locking device to be activated by the detection signal of the detector. A positioning device for an induction heating device is provided.

(Embodiment) The present invention will be described in detail below using an embodiment of the apparatus shown in FIGS. 1 to 2b.

In Fig. 1, 1 is the hydraulic cylinder, 11 is the rod of the hydraulic cylinder 1, 2 is the saddle on which the current transformer is placed, C is the heating coil, and W is the center shaft 3 inserted into the center hole 4, 4. This is a flanged member that is supported by In the present invention, the detector 6 is fixed near the output terminal 5 of the current transformer to which the heating coil C of the induction heating device is connected, and the probe 61 is connected to the flanged member W.
The end face opposite to the end face fr of the flange F following the R part R of
so that it protrudes in the cr direction, and its tip is above the end surface cr.
and a predetermined gap β, that is, the optimum gap for heating the R part R to a predetermined temperature to a predetermined depth. In addition, in the present invention, the hydraulic cylinder 1
Since the forward and backward movement of the rod 11 of the hydraulic cylinder 1 is not allowed to have inertia and must be stopped instantaneously for reasons to be described later, a cylinder lock device (trade name;
BEAR-LOC). As shown in FIGS. 2a and 2b, for example, the cylinder lock device 7 includes a sleeve 71 of a predetermined length having an inner diameter approximately equal to the outer diameter of the rod 11, and a sleeve 71 having an outer diameter of the rod 11 arranged at both ends thereof. The sleeve 71 has annular portions 72, 72 having approximately equal inner diameters, a spiral groove 73 is carved in the inner circumferential wall of the sleeve 71, and a supply/discharge passage 74 is formed in each of the annular portions 72, 72. High-pressure oil can flow in and out from an oil supply source (not shown) through 74, and when the rod 11 to which the cylinder lock device 7 is attached is in an oil-inflow state, the sleeve 73 is pushed outward as shown in FIG. 2b. The sleeve 73 is configured to be able to expand and slide, and to be able to instantly tighten when the sleeve 73 contracts as shown in FIG. 2a in the discharge state due to oil supply being stopped.

Thus, the annular portion 7 of the cylinder lock device 7
2 is fixed to the hydraulic cylinder 1 in a fixed state, and when the detection signal emitted by the detector 6 is not input, high pressure oil is supplied from the oil supply source, and when the detection signal is input, the oil supply source Set to stop the supply of high pressure oil from the tank and enter the discharge state. On the other hand, the present invention differs from the conventional example in that the most advanced position or the most retracted position of the rod 11 of the hydraulic cylinder 1 is set at a distance α from the reference end face of the flanged member W (in the above conventional example, the end face fs of the flange F). Without, the distance α
is set so that it is included within the most advanced position or the most retracted position of the rod 11, that is, within the stroke, with sufficient space.

(Function of the device) In the present device having the above configuration, the tip of the probe 61 of the detector 6 is set to be separated from the end surface cr of the heating coil C by a predetermined gap β, so that, for example, the heating start position is set at the flanged member W. When viewed from the direction of the flange F, the hydraulic cylinder 1 is operated to advance the rod 11 from the top to the bottom in the drawing in FIG. R of the flanged member W supported by
If a predetermined gap is to be maintained between the end face fr of the flange F that continues from the part R, the detector 6 will close when the tip of the probe 61 of the detector 6, which descends with the heating coil C, comes into contact with the end face fr of the flange F. A detection signal is issued from the cylinder locking device 7, and the supply of high pressure oil from the oil supply source to the cylinder locking device 7 is stopped.
stops forward movement momentarily. Therefore, when the rod 11 is stopped, the end face cr of the heating coil C automatically maintains the gap β with respect to the end face fr of the collar F.

In other words, the present invention completely eliminates the center hole 4 that has machining errors and the variation in the positional relationship of the heating coil with respect to the reference plane caused by this, and improves the stability of the opposing heating coils C and flange F. End face CR・
The actual gap between fr is detected, and the actual gap is maintained at the moment the actual gap is detected. Therefore, if the actual gap is set to a predetermined gap β, the heating effect will naturally be eliminated. becomes constant.

(Effects of the invention) By implementing the invention, (1) heat treatment of a large number of members with flanges of the same shape will all result in the same finish, so a constant high quality is guaranteed, and (2) the operation is easy. It is sufficient to set the gap between the heating coil and the detector probe before heat treatment. (3) Furthermore, even if the shaft has a flanged shaft with a different reference end face or shape, if the heating conditions of the R part and the shaft diameter are the same, For example, even if a mixture of the two is introduced into an induction heating device, it is possible to perform heat treatment that guarantees a certain level of high quality regardless of the differences mentioned above.The effects brought about by this are extremely large and rich in practical value. I'm here.

[Brief explanation of the drawing]

FIG. 1 is a front view of an induction heating device equipped with an embodiment of the positioning device of the present invention, FIGS. 2a and b are sectional views each showing an example of the cylinder lock device used in the present invention, and FIG. FIG. 2 is a front view of an induction heating device for explaining a conventional positioning method. 1... Hydraulic cylinder etc., 11... Rod, 2...
...Saddle, 6...Detector, 61...Probe, 7
... Cylinder lock device, C ... Heating coil, W
...flange member, F...flange part, R...R part, fr...
...The end surface continuing to the R part of the flange, cr...The end surface facing the flange of the heating coil.

Claims (1)

[Scope of utility model registration request] A saddle that can move forward and backward by having a heating coil that heats the surface of the R part, which is the connecting part between the flange part and the shaft part of a flanged member, or the R part and the shaft part, pivoted to the tip of a rod such as a hydraulic cylinder. In the equipment connected to the current transformer placed on the
It consists of a detector fixed near the connection between the heating coil and the current transformer, and a cylinder lock device that is attached to a predetermined position of the rod such as the hydraulic cylinder and can instantly stop the rod from moving forward or backward. , while setting a predetermined gap between the tip of the probe of the detector and the end face of the induction heating coil facing the end face of the flange part following the R part of the flange member, and using the detection signal of the detector to lock the cylinder lock device. A positioning device for an induction heating device, characterized in that the positioning device is configured to operate.