JPS6217123A - High frequency automatic quenching apparatus - Google Patents

Abstract

PURPOSE:To prevent damage of a gap sensor and to improve quenching workability, by providing control means for bringing the gap sensor to contact with or leave from a surface to be treated of a work, based on detected signal of the surface part to be treated of the work. CONSTITUTION:End part detecting sensors 19, 22 are provided in addition to the gap sensors 4, 5 to a matching unit 2, to detect end part of the surface 1a to be treated of the work 1. A control part 16 operates air cylinders 26, 27 due to detected signal of the sensors 19, 22, and the sensors 4, 5 are brought to contact with or leave from the surface 1a of the work 1. In this way, high frequency quenching can be carried out while correcting and maintaining the gap between the surface 1a and a work coil 3 to a suitable value.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an automatic high-frequency hardening device, and more particularly to an automatic high-frequency hardening device for automatically high-frequency hardening a linear motion guide surface in a machine tool or the like.

B0 Summary of the Invention This invention provides an automatic high-frequency hardening device equipped with a gap sensor that detects a gap between the workpiece and the workpiece coil by pressing a stylus against the surface of the workpiece to be processed. By providing a position control means for bringing the gap sensor into contact with and away from the surface to be processed of the workpiece in accordance with the detection signal of the end, damage to the gap sensor can be prevented and workability of the hardening operation can be improved.

C6 Conventional technology Conventionally, an induction hardening device that automatically hardens the linear motion guide surface of a machine tool, etc. while heating it by high-frequency induction heating has been used to harden the workpiece (machine tool) as shown in Fig. 4. An alignment unit 2 is provided above the surface to be treated (surface to be hardened) la, supported by a portal frame (not shown). This matching unit 2 is used for tap changers and matching (
It consists of a matching) transformer, etc., and is connected to a high frequency power source (not shown) via a cable. The alignment unit 2 is relatively movable back and forth along the processing surface 1a of the work l by means of a traveling device (not shown), and can be moved in the vertical and perpendicular directions orthogonal to the traveling direction by means of a positioning device (not shown). It is provided so that it can move forward and backward in the horizontal direction.

A work coil 3 having a shape that follows the shape of the surface to be processed 1a of the work l is connected and supported by the alignment unit 2. In addition, the alignment unit 2 is further connected to the work coil 3 in the running direction (
A vertical gap sensor 4 and a horizontal gap sensor 5, which are located at the front (rightward in FIG. 4) and extend vertically and horizontally perpendicular to the running direction, are mounted via support arms 6.7, respectively. ing. Each gap sensor 4.5 measures and detects the distance between the workpiece coil 3 and the processing surface 1a of the workpiece l, which is usually about several millimeters.

The gap sensors 4 and 5 are, for example, as shown in FIG.
It consists of a differential transformer in which a coil 9 and a core 10 are housed in a cylindrical body 8. The core 10 includes a gap sensor 4.
The shaft 12 of the stylus portion 11 at the tip of the stylus 5 is fixed coaxially. A steel ball 13 is provided at the tip of the shaft 12 to reduce sliding resistance, and the steel ball 13 is constantly urged by a spring 14 to press against the surface of the workpiece 1 to be processed. Reference numeral 15 denotes a cover of the stylus portion 11, which is made of rubber.

On the other hand, the alignment unit 2 supports a control section 16 that together with a positioning device constitutes a gap control means, and the detection signals (measured values) detected by each gap sensor 4.5 are transmitted through a signal line 17. .18 to the control unit 16. The control unit 16 controls the operation of the positioning device of the alignment unit 2 to automatically correct and maintain the gap between the processing surface 1a of the work l and the work coil 3 at a predetermined value (gap). control).

Further, in the alignment unit 2, an end detection sensor 19 for detecting the end of the processed surface 1a of the workpiece 1 is attached via a support arm 20 to an appropriate position in front of each gap sensor 4.5 in the traveling direction. It is being The end detection sensor 19 uses, for example, an optical sensor consisting of a light emitting part and a light receiving part using reflection from the surface to be processed 1a, and is connected to the control part 16 via a signal line 21.

The detection signal of the edge detection sensor 19 is input to the control unit 16 via the signal line 21, and the processing target surface 1 is
The gap between a and the work coil 3 is maintained at the set value at the time of detecting the end for a predetermined time, and the traveling device is operated for a predetermined time.

D6 Problem to be solved by the invention By the way, as shown in FIG.
If a is on two or more surfaces, such as the upper and lower surfaces or the left and right sides, the workpiece coil 3 and the gap sensor 4.5 are fixed to the same thing (alignment unit 2). The coil 3 and the gap sensor 4.5 are connected to the angle 45 of the gap sensor 4.5 in the direction of arrow A.
'Cannot be set from above. That is, in the case shown in FIG. 6, when setting the work coil 3 and the gap sensor 4.5, the work must be inserted into the work coil 3 from the traveling direction of the work 1 with respect to the surface to be processed 1a.

In this case, the stylus portion 11 of the gap sensor 4.5 is biased toward the surface to be processed Ia and protrudes from the surface to be processed 1a, so if the gap sensor 4.5 is moved in this state, the workpiece It collided with 1 and was damaged. Therefore, when setting the gap sensors 4.5 on the surface 1a to be treated, the operator must move the gap sensors 4, 5 while holding the stylus portion 11 in a retracted state. The sex was extremely bad.

Means for Solving Problem E1 In order to solve the problems of the prior art, the present invention has constructed an automatic high-frequency hardening apparatus as follows.

The work coil is provided so as to be relatively movable back and forth along the surface to be processed of the work by a traveling device or the like.

In addition, a gear tooth sensor is provided whose stylus portion presses against the surface to be processed of the workpiece to detect the gap between the workpiece and the workpiece coil, and the gap between the workpiece and the workpiece coil is adjusted to a predetermined value according to the detection signal of this gap sensor. The work coil is provided with gap control means for advancing and retracting the work coil in a direction orthogonal to the traveling direction thereof so as to maintain the work coil in the same direction. Further, an edge detection sensor is provided for detecting the edge of the surface to be processed of the workpiece, and a position control means is provided for bringing the gap sensor into contact with and away from the surface to be processed of the workpiece in accordance with a detection signal from the edge detection sensor.

F6 action According to the induction hardening apparatus having the above configuration, the edge detection sensor detects the surface to be processed (starting end) of the workpiece. According to the signal, the position control means of the gap sensor is operated to bring the gap sensor into contact with the surface to be processed. Then, hardening is performed while maintaining the gap between the work coil and the work coil at a predetermined value according to the detection signal of the gap sensor. Next, when the end detection sensor detects the end (terminus) of the surface to be processed of the workpiece, the position control means for the gap sensor is activated in accordance with the detection signal to move the gap sensor away from the surface to be processed.

G. Example Hereinafter, the present invention will be explained in detail based on an example shown in FIGS. 1 to 3. It should be noted that the same parts as in the prior art are indicated by the same reference numerals as in FIG. 4, and their explanation will be omitted.

For example, as shown in FIG. 1, the high-frequency automatic hardening apparatus of the present invention includes an edge detection sensor 19 provided in front of the gap sensor 4.5 in the running direction, and an alignment unit 2j that detects the covered area of the workpiece 1. An end detection sensor 22 for detecting the end □ of the processing surface 1a is attached via a support arm 23 at an appropriate rear position of each gap sensor 4.5 in the running direction. The edge detection sensor 22 is the same as the edge detection sensor 1.
Similar to 9, an optical sensor is used, and it is connected to the control section 16 via a signal line 24.

On the other hand, each gap sensor 4.5 is coaxially fixed to each piston of the air cylinder 2[3, 27, which is attached to the alignment unit 2 via a support arm 25.7. The air cylinders 26 and 27 together with the control section 16 constitute a position control means, and the end detection sensor 19
, 22, the gap sensor 4.
5 is brought into contact with and separated from the processing surface 1a of the work l by the operation of the air cylinders 26 and 27.

According to the high-frequency automatic hardening apparatus having such a configuration, the alignment unit 2 is moved by the traveling device, and the work coil 3. The gap sensor 4.5 and the edge detection sensors 19, 22 are run along the processing surface 1a of the work l, and the edge detection sensor 22 detects the edge (starting end) of the processing surface 1a as shown in FIG. ), the air cylinders 26, 27 are automatically operated according to the detection signal at the end, and the gap sensor 4.5 is brought into contact with the surface to be processed 1a. Then, induction hardening is performed while correcting and maintaining the gap between the processing surface 1a of the work 1 and the work coil 3 at an appropriate value according to the detection signals of the gap sensors 4.5.

Further, the alignment unit 2 is caused to travel, and when the end detection sensor 19 reaches the position where it detects the end (terminal end) of the surface to be processed 1a as shown in FIG. 3, the air cylinders 26, 27 is automatically activated, and the gap sensor 4.5 is separated from the surface to be processed 1a. At the same time,
The position of the work coil 3 is fixed at the position at the time of separation of the gap sensor 4.5, and the work coil 3 is further moved to complete hardening to the end (terminus).

In addition, in order to line up multiple workpieces 1 and perform quenching in sequence,
The above operations are repeated.

In the above embodiment, two edge detection sensors 19°22 were used, but it is possible to achieve the same effect as in the embodiment with only one edge detection sensor 19 (front in the traveling direction). . That is, the edge detection sensor 19 detects the surface to be processed 1a.
When the end (starting end) of is detected, the air cylinders 26, 27 are automatically activated after a certain period of time or after traveling a certain distance, and the gap sensor 4.5 is brought into contact with the surface to be processed 1a. Thereafter, induction hardening is carried out in the same manner as in the above embodiment, and the gap sensor 4.5, through which the edge detection sensor 19 detects the end of the surface to be treated 1a, is separated from the surface to be treated 1a again.

Further, the end detection sensors 19 and 22 are not limited to optical ones, but may be mechanical ones using air pressure or electrical ones. In the case of electrical devices, it is desirable to provide shielding with an electromagnetic shield.

Furthermore, the position control means for the gap sensor 4.5 is not limited to a fluid cylinder such as an air cylinder, and various drive devices such as a motor drive can be used.

On the other hand, when the gap sensors 4 and 5 separate from the surface to be processed 1a, the position of the work coil 3 is fixed at the position at the time of separation, but this is done according to the detection signal of the edge detection sensor 19. It may also be something that controls;
The gap control circuit may be locked in accordance with a detection signal indicating that the gap amount of the gap sensor 4.5 itself is greater than a predetermined value.

H1 Effects of the Invention As described above, the automatic high-frequency hardening apparatus of the present invention is provided with a position control means for automatically bringing the gap sensor into contact with and separating from the surface to be processed of the workpiece in accordance with the detection signal of the surface to be processed of the workpiece. Therefore, it is possible to prevent damage to the gap sensor, automate induction hardening, and improve workability.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the automatic induction hardening apparatus of the present invention, FIGS. 2 and 3 are perspective views of essential parts for explaining the operation of the apparatus shown in FIG. The figure is a perspective view of a conventional high-frequency automatic hardening apparatus, FIG. 5 is a longitudinal sectional front view of a gap sensor, and FIG. 6 is a side view showing the main part of FIG. 4. l...Workpiece, la...Surface to be processed, 3...Work coil, 4.5...Gap sensor, 11-...Stylus section, 16...Control section, 19.22...・End detection sensor, 26.27...Air cylinder. Na Figure 4 High 5L1 Inkstone drawing on the 4th floor of Yochi (traditional) Figure 6 Part of the 4th day of the 1st side country

Claims (1)

[Claims] (1) A gap sensor in which a work coil is provided so that it can move relatively back and forth along the surface to be processed of the work, and a stylus portion presses against the surface to be processed of the work to detect the gap between the work and the work coil. and a gap control means for advancing and retracting a work coil in a direction orthogonal to the traveling direction of the work coil in order to maintain the gap at a predetermined value according to a detection signal from the gap sensor. The high-frequency automatic firing apparatus is characterized in that an edge detection sensor for detecting the edge of the surface is provided, and a position control means is provided for bringing the gap sensor into contact with and away from the surface to be processed of the workpiece in accordance with a detection signal from the edge detection sensor. input device.