JPH0530145U - Quenching equipment - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To shorten the processing time including the inspection time by enabling inspection during the induction hardening process. [Structure] In an apparatus 1 that includes a headstock 1A and a tailstock 1B, and performs induction hardening while rotating both ends of a machined part while sandwiching both ends in the axial direction, the machined part faces one axial end surface of the machined part A position detection sensor 3 for detecting the distance between the arm 5 and the one end surface is provided at the tip of the arm 5 which can be selectively swung between the one end surface and the position.
The sensor 3 and the induction hardening control unit 7 are connected to the input unit, and the output unit includes the detection control unit 6 to which the display unit 8 is connected. The detection control unit 6 controls the quenching. When it is instructed by the section 7 that the cooling water is being supplied after the high frequency heating, the surface property of the machined part is improved when the reading value from the detection sensor changes by a predetermined amount or more during the rotation of the machined part. Show that it is not uniform.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a quenching device, and more particularly, to a structure of a quenching device having a function of detecting a surface condition of a component to be quenched.

[0002]

[Prior Art]

 The hub fitted to the steering knuckle of the front wheel axle for automobiles, for example, when arranging the brake drum on the outer side of the hub, strictly manages the flatness of the joint surface with the brake drum so that it can be used during braking. It is considered to prevent the occurrence of abnormal vibration. For this reason, in the manufacturing process of the front hub, a process is set to inspect whether the centering was correctly performed during the grinding performed before the finish grinding. The inspection device having the structure shown was sometimes used. That is, the inspection apparatus A includes a headstock D and a tailstock E, which are arranged on a base B and hold the shaft end of the front hub C in the axial direction, and the front hub is held in the axial direction. A dial gauge F is made to face the disk surface of C and the inclination of the disk surface with respect to the axial direction is detected to determine the degree of end face runout.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned inspection process, it is necessary to prepare a special inspection device, and when inspecting all the front hubs C, it is necessary to attach / detach the inspection device one by one. The processing time may be lengthened, and the processing cost may increase due to the cost of the inspection device unrelated to the processing device.

Therefore, an object of the present invention is to make it possible to perform the above-described inspection of a component in a quenching process, which is one of the process steps of processing a component, in view of the problems in the conventional inspection apparatus described above. Therefore, it is to obtain a quenching device having a structure that can shorten the processing time including the inspection time.

[0005]

[Means for Solving the Problems]

 In order to achieve this object, the present invention provides a quenching device that includes a headstock and a tailstock, and performs induction hardening while rotating both ends of the processed part while holding the two ends in the axial direction. It is provided at the tip of a swing arm that can selectively swing between a position facing one axial end face of the machined part and a position retracting from this one end face, and between the same end face. A position detection sensor for detecting a distance, the position detection sensor and the control unit for induction hardening are connected to the input unit, and the output unit includes a detection control unit to which the display unit is connected. When the control unit for quenching is instructed to supply cooling water after high-frequency heating, the detection control unit is provided with a reading value from the position detection sensor, It changes more than a certain amount while the part is rotating. It is characterized by displaying the non-uniform surface of the workpiece when.

[0006]

[Action]

 According to the present invention, the distance between the machined part and the position detection sensor is detected during cooling performed after high-frequency heating, and if there is a change in the detected value, the surface property of the machined part must be uniform. Determine.

[0007]

【Example】

 Hereinafter, the details of the embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a schematic view showing a structure of a main part of a quenching device according to an embodiment of the present invention. In FIG. 1, the quenching device 1 is a device for hardening the surface of a shaft portion of a front hub described in the related art. It is a target and includes a headstock 1A, a tailstock 1B, and a quenching coil 1C. The headstock 1A described above rotates the front hub 2 by receiving power transmission from a drive unit (not shown), and the tailstock 1B is movable in the axial direction of the front hub 2, It moves when the hub 2 is attached or detached.

On the other hand, a position detection sensor 3 is arranged at a position near the disc 2A on the front hub 2 to detect the distance from the disc 2A surface. That is, the position detection sensor 3 includes a swing arm 5 whose fulcrum shaft is connected to the cylinder 4, and faces the upper surface of the disc 2A of the front hub 2 at the swing end of the swing arm 5. It is provided at the position where The swing arm 5 is in an initial state in which the position detection sensor 3 is retracted from the disk 2A surface of the front hub 2. Further, the position of the sensor 3 when facing the front hub 2 disc 2A in the position of the position detection sensor 3 described above is set so that the inclination of the disc 2A with respect to the axis is easily detected from the outer periphery of the disc 2A. The position is.

The position detection sensor 3 detects the distance between the front hub 2 and the disk surface based on the change in the eddy current generated when the disk surface rotates. A digitally converted signal is output to a detection control unit 6 described later.

That is, the detection control unit 6 is mainly composed of, for example, a microcomputer, and on the input side, the position detection sensor 3, the headstock 1A, and the tailstock 1B are operated. A quenching control unit 7 for controlling the dynamic state, the energization state of the high frequency coil 1C, and the cooling process after heating is connected, and a display unit 8 is connected to the output side. In the detection control unit 6 described above, in addition to the setting of the swinging position of the swing arm 6 when the front hub 2 is attached or detached, the quenching control unit 7 sends a signal indicating that cooling after heating has been performed. At the time of input, the rotation of the front hub 2 is maintained, the position detection sensor 3 is operated, and the detection value from the position detection sensor 3 is input one by one, thereby determining whether the input value changes. It is like this. In other words, if the detected value from the position detection sensor 3 changes when the front hub 2 rotates, it is determined that the disk surface of the front hub 2 does not have uniform flatness with respect to the axis. Then, a signal indicating that the front hub 2 is not correctly centered is output to the display unit 8.

Since the present embodiment is configured as described above, its operation will be described with reference to the flowchart showing the hardening procedure as shown in FIG. The front hub 2 in the step shown in FIG. 3 is expressed as a work. That is, when the work is carried in, the tailstock 1B is moved up and down to set the work, and when the work is set, the spindle stock 1A is rotated to rotate the work. Let With the rotation of the work, energization of the high frequency coil 1C is started, high frequency heating is performed, and the energization is stopped at the time when the energization time has passed a predetermined time to discharge the cooling water. Put in. In response to the signal output from the quenching control unit 7 to the detection control unit 6 at the time when the discharge of the cooling water is started, the detection control unit 6 sets the swing arm 5 to the initial position. The position detection sensor 3 sets the position to face the disk 2A of the front hub 2, and outputs a signal for maintaining the rotation of the headstock 1A to the quenching controller 7.

When the position detection sensor 3 inputs a signal corresponding to the distance from the disc 2A to the detection control unit 6, the detection control unit 6 determines that the distance (L) corresponding to the detected value is equal to the value up to now. It is determined whether the input value matches the input value within a predetermined range based on the magnitude relationship. If there is a change, the display unit 8 is turned on and the flatness of the front hub 2 on the disk 2A is uniform. Display that it is not.

[0014]

[Effect of the device]

 As described above, according to the present invention, it is possible to detect the surface condition of the machined part during quenching, so it is not necessary to set a special inspection process, and the process of inspecting the machined part requires a machining time. It is possible to shorten the processing time by eliminating the transfer to.

Further, since no special inspection device is required, the cost for the inspection can be reduced, and the processing cost including the device and time required for the inspection can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic view for explaining a main structure of a quenching apparatus according to an embodiment of the present invention.

FIG. 2 is a view in the direction of the arrow shown in FIG.

FIG. 3 is a flowchart for explaining a quenching procedure according to the main part structure shown in FIG.

FIG. 4 is a schematic diagram showing a main part structure of a conventional machined part inspection apparatus.

[Explanation of symbols]

 1 Quenching device 1A Headstock 1B Tailstock 1C High frequency coil 2 Front hub which is a machining part 2A Disk 3 Position detection sensor 5 Swing arm 6 Detection control section 7 Quenching control section 8 Display section

Claims (1)

[Scope of utility model registration request] 1. A quenching apparatus comprising a headstock and a tailstock, wherein induction hardening is performed while rotating both ends of a machined part while sandwiching both ends in the axial direction of the machined part. A position detection sensor provided at the tip of a swing arm capable of selectively swinging between a position facing the one end face and a position retracting from the one end face, and detecting the distance to the same end face. And the position detection sensor and the control unit for the induction hardening are connected to the input unit, the output unit includes a detection control unit to which the display unit is connected, the detection control unit, When it is instructed by the controller for quenching that cooling water is being supplied after high-frequency heating, the value read from the position detection sensor changes by more than a predetermined amount during rotation of the processed part. Surface area of the machined parts Quenching apparatus, characterized in that the display that not.