JPH0715131B2 - High frequency plug hardening device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a high-frequency plug hardening apparatus having a workpiece carry-in control mechanism.

(Prior Art) A ring-shaped component such as a differential gear is subjected to induction hardening treatment for the purpose of improving hardness. The high frequency induction hardening process is usually performed by carrying out processes such as high frequency induction heating, plug hardening, and annealing during the transportation of the object to be processed. These processes are carried out by, for example, the high frequency plug hardening device 1 as shown in FIG.
Is done using. In this apparatus, first, the article to be processed is set at the carry-in position, conveyed to the position of the high-frequency induction heating furnace 12 and subjected to high-frequency heating, and then the plug hardening apparatus.
It is conveyed to 13, where the plug is inserted and cooled by a cooling liquid to carry out plug quenching, and then it is further conveyed to an annealing furnace 14 to perform annealing.

The loading of the products to be processed is automatically performed by pulling the products to be processed, which have been carried by the operator in piles for each rod, to a predetermined loading position by the loading means. In addition, after the carry-in, the article to be processed is automatically carried to each step.

(Problems to be Solved by the Invention) However, it is possible that a lot of the product to be processed that has been conveyed to the high frequency plug hardening device is mistakenly mixed with a product to be processed that is different from the product to be processed. is there. In some cases, the funnel itself is erroneously carried and all the products to be processed in the lot are different from those to be processed.

In induction hardening, a plug manufactured according to the size and material of the product to be processed is used, and the size of the plug is very precise. Also, the distance of vertical movement of the plug, the temperature of the high frequency heating furnace and the annealing furnace, etc.
Precisely set according to the product to be processed. Therefore, when an object to be processed, which is different from the object to be processed, is carried into the high-frequency heating device, an excessive force is applied to the plug, and the plug is cracked, resulting in serious damage to the device.
Particularly, when the lot itself is erroneously loaded, several to ten or more different objects to be processed are continuously processed, and the damage to the apparatus becomes more serious.

The present invention solves such a problem, and when a non-standard processed product is erroneously carried in, it is possible to detect the situation and manually remove the processed product, if necessary. It is possible to automatically remove the wrongly processed non-standard workpiece from the loading position and, in some cases, stop the operation of the high frequency plug device, which may damage the high frequency plug device such as a plug. In addition, in the event of accidental delivery, if the standard processed product remains in the equipment, it can be prevented from becoming a defective product. An object of the present invention is to provide a high-frequency plug quenching device having a carry-in control mechanism.

(Means for Solving Problems) In order to solve the above-mentioned problems, the high-frequency plug hardening apparatus of the present invention has a setting means for setting the height of the object to be processed of the standard, a detection head, and a scale. And a detector, which includes a magnetic scale for detecting the height of the processed product carried in by the movement amount of the detection head at the carrying-in position of the processed product, the set height and the detected height. It is characterized in that it is provided with a processed article carry-in control mechanism including a comparison means for making a comparison judgment.

The article carry-in control mechanism preferably includes, in addition to the above-mentioned setting means, detecting means and comparing means, a removing means for removing the non-standard article to be processed from the carry-in device.

More preferably, in addition to the setting means, the detection means, the comparison means, and the removal means, the above-described processing-item loading control mechanism counts the number of times the non-standard processing item is continuously loaded. When the number of times is less than 3 times, the operation of the apparatus is continued, and when the number of times is 3 times or more, the operation control means for stopping the operation of the apparatus is included.

The detection means in the present invention includes a detection head, a scale, and a detector, and includes a magnetic scale (linear scale) for detecting the height of the article to be processed carried in based on the movement amount of the detection head. In the means, when the article to be processed is carried in, the detection head descends to the position of the article to be processed, the height is detected by the amount of movement thereof, and the value is output to the comparison and determination means for height. That is, the detection means including the magnetic scale reliably detects the height of the processed product carried in the processed product carry-in position without moving the processed product. Moreover, the present detection means is also advantageous in that it is relatively small.

In the comparison means, for example, the measured height x is compared with the set height h, and between the two values, h−α ≦ x ≦
When the relationship of h + α (α is the error range) is established, it is determined that the correct processed product is loaded, and a signal for continuing the process is output, and the relationship of h−α> x or x> h + α is established. Determines that a processed product different from the processed product to be processed (hereinafter referred to as non-standard processed product) has been carried in, and outputs a signal for removing the processed product.
A signal for adding 1 to the value of a counter, for example, a means for counting the number of times the non-standard processed product is continuously carried in is output.

As the removing means, for example, a pull-out claw that can move in the conveying direction of the article to be processed and the opposite direction thereof, and in the vertical direction can be used. As a means for moving the pull-out claw, for example, a cylinder for moving back and forth (moving in a direction opposite to the conveying direction of the object to be processed) and a cylinder for moving it up and down can be used. In this means, the withdrawal claw is moved forward and downward with a cylinder to hook the object to be treated, and by retracting the object as it is, the object to be treated is withdrawn in the direction opposite to the conveying direction of the processing line, and is then removed from the processing line. Can be removed.

As the counting means, a commonly used counter can be used. In the counter, the value of the counter becomes 1 when the comparison means determines that the carried-in processed product is erroneous. Then, if the next processed product is also out of the standard, 1 is further added and the counter value becomes 2. However, if the next processed product is correct, the counter is reset and the value becomes 0. Becomes As a result, it is possible to automatically automatically count the number of consecutive non-standard processed products that have been carried in.

In the operation control means, the counter value n is n <3.
At the time of 0, that is, 1 time and 2 times, a signal for continuing the operation of the high frequency plug hardening device is output,
When n ≧ 3, that is, when the number of times is three, a signal for stopping the operation of the device is output. The reason why the continuation and the stop of the operation are determined by the equations of n <3 and n ≧ 3 is as follows. In general, the treatment process of the induction hardening device is 3 steps of induction heating, plug hardening and annealing.
When a non-standard processed product is loaded into the processing line for the first time or the second time, that is, when the count value n is 1 or 2, the standard processed product carried in the previous stage remains on the processing line. ing. Therefore, if the apparatus is stopped at that stage, the processing of those prescribed products to be processed is interrupted and the products become defective. In addition, at this stage, there may be one or two erroneous products to be processed, and in that case, there is no problem if only the products to be processed are pulled out. However, when three consecutive processed products are out of specification, that is, when the count value n becomes 3, there is a high possibility that the lot itself has been erroneously carried. In that case, It is better to stop the equipment and replace the lot. Also, at this point, the first two erroneous products to be processed have already been drawn out, and there is no product to be processed at the position of the high-frequency heating furnace and the plug hardening device, and even if the device is stopped here, defective products will be detected. There is no worry about putting it out.

In the high frequency plug hardening apparatus of the present invention, preferably, when a wrong processed product is detected and / or when the operation of the apparatus is stopped, a means for sounding the buzzer and / or an indicator lamp is turned on. Means are provided.

(Operation) The high frequency induction hardening apparatus of the present invention is provided with a means for comparing and determining whether or not the carried-in processed product is of the standard according to the height of the processed product in the processed product carry-in control mechanism. Therefore, when a non-standard processed product is erroneously carried in, the situation can be detected. Therefore, when this situation occurs, the worker manually removes the non-standard processed product from the carry-in position, thereby avoiding an accident of device damage due to the non-standard processed product. In addition, if the in-processed article carry-in control mechanism also includes a removing means, the in-standardized article that has been mistakenly carried in can be automatically removed from the carry-in position. Not only is the device such as a plaque not damaged by the processed product, but also it is not necessary for the worker to continue monitoring at the loading position of the high-frequency plug device, which can contribute to a reduction in the number of workers. Further, by providing the counting means and the operation control means for stopping the device when the non-standard processed product continues three times, the device is operated when the non-standard processed product is carried in for the first time or the second time. Since the operation of No. 1 is continued, the processed product of the standard already on the processing line does not become a defective product.

(Examples) Hereinafter, the present invention will be described in more detail with reference to Examples.

Example 1: FIG. 2 is a view of an induction-plug quenching apparatus 1 equipped with a control mechanism for loading an article to be treated in an induction-plug quenching apparatus, as viewed from a direction orthogonal to the direction in which the article to be treated is conveyed. Yes, FIG. 3 is a view of the apparatus 1 as viewed in the transport direction of the article to be processed.

The control mechanism of this embodiment has a circuit (not shown) for setting the height of the processed product to be processed, a linear scale 5 for detecting the height of the carried-in processed product, and is set. A circuit (not shown) for comparing the height with the detected height to determine whether or not the workpiece to be introduced is correct.
Pull-out claw 2 for pulling out the processed article determined to be erroneous from the processing line, cylinders 3 and 4 for moving the pull-out claw 2 back and forth and up and down, and the erroneous processed article are continuously carried in. A counter (not shown) for counting the number of times performed, if the number of times is less than three, the operation of the device is continued, and if the number of times is three or more,
It consists of a circuit (not shown) for stopping the operation of the device. Of these, the linear scale 5 and the drawer claw 2
The cylinders 3 and 4 are installed in the vicinity of the loading means 9 provided at the loading position of the article to be processed.

Further, the article to be processed is carried in by the carrying-in means 9 in a direction orthogonal to the conveying direction of the article to be processed.

Use example 1: The following shows the operating state of the control mechanism in the above apparatus when three erroneous workpieces are successively loaded. The height h of the article to be processed is
Is stored in advance in the height setting means.

First, the carry-in claw 10 of the carry-in means 9 moves forward and then descends to catch the first article 11 to be processed, and then retracts and pulls to a predetermined position to carry it into the carry-in position. Next, the linear scale 5 is lowered by the cylinder 6, and the height of the article 11 to be processed is detected by the detection head 7. The height data x thus detected is sent to the height determination circuit, where h−a ≦ x ≦ h + a (a is between the detected height x and the preset height h. Is the error range), or h-a> x or x> h + a
By determining whether or not the relationship is satisfied, it is determined whether or not the processed product carried in is correct or out of specification.
(A in FIG. 1). If the product to be processed is out of the standard, the linear case 5 is raised and a signal indicating that the product to be processed is out of the specification is output to the removing unit, the buzzer, the lamp lighting unit, and the counter (not shown).

In the removing means, first, the pull-out claw 2 is moved forward by the pull-out claw front-rear cylinder 3, lowered by the pull-out claw upper and lower cylinder 4, and retracted as it is, so that the article to be processed 11 is pulled out in the direction opposite to the carrying direction, and the bucket Collect in 8. After that, the pull-out claw 2 rises and returns to the original position. (B in FIG. 1) In the buzzer sounding means and the lamp lighting means, the buzzer sounds for a certain period and the lamp lights for a certain period.

At the counter, the value becomes 1, and a signal for continuing the operation is output.

Subsequently, the second processed product is loaded. Since this processed product is also out of the standard, the same process as the first rotation is performed except that 2 is recorded on the counter.

Then, the article to be processed for the third time is carried in in the same manner as above.
Since this processed product is also out of the standard, the same process as the second process is performed. However, in this case, since the value of the counter is 3, the signal for stopping the operation of the device is output and the operation is stopped (c in FIG. 1).

At this point, the buzzer sounds again and the indicator lamp lights up.

Use example 2: The following shows the operating state of the control device when two non-standard processed products are successively loaded into the above device, and then the correct processed products are loaded next.

The operation state when the non-standard processed product is carried in the first two times is the same as that in the first use example. However, since the correct processed product is carried in the third time, the counter is reset (d in FIG. 1) and the value becomes zero. At the same time, a signal for continuing the operation of the device is output, and normal operation is continued.

(Effect of the Invention) In the high frequency plug quenching apparatus of the present invention, when a nonstandard product is erroneously carried in, the situation is detected, and the nonstandard product can be manually removed. Or, since it is removed automatically, the non-standard processed product does not damage the parts of the device such as the plug and the durability of the device is improved. Also, when the equipment is stopped for the first time when it is mistakenly loaded three times and non-standard processed products are loaded once or twice, the operation is not stopped. Therefore, the processing of the product already on the processing line is not interrupted to make it a defective product. Therefore, working efficiency is improved and production cost can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a flow chart showing a control mechanism for carrying in an object to be processed of an induction-hardening apparatus according to an embodiment of the present invention, and FIG. 2 is a carrying-in position of the induction-hardening apparatus according to the embodiment. FIG. 3 is a view of the vicinity of the product viewed from a direction orthogonal to the transfer direction of the product to be processed. FIG. 3 shows the vicinity of the loading position of the induction hardening device of FIG. 4 is a side view of a conventional high frequency plug quenching device. 1 …… Induction hardening device, 2 …… Drawer claw 3,4,6 …… Cylinder, 5 …… Linear scale 11 …… Processed product

Claims (4)

[Claims] 1. A setting means for setting the height of an object to be processed of the standard, a detection head, a scale, and a detector, and the object to be processed carried in by the movement amount of the detection head at the object carrying-in position. A high-frequency plug hardening apparatus comprising a processing target carry-in control mechanism including a detection unit including a magnetic scale for detecting the height, and a comparison unit that compares the set height with the detected height. 2. A setting means for setting the height of an object to be processed of the standard, a detection head, a scale, and a detector, and the object to be processed carried in by the moving amount of the detection head at the object carrying-in position. From the detection means including a magnetic scale for detecting the height, the comparison means for comparing the set height with the detected height, and the removal means for removing the non-standard processed product from the carry-in position. Induction hardening device, which is equipped with a processing control system. 3. A setting means for setting the height of an object to be processed of the standard, a detection head, a scale, and a detector, and the object to be processed carried in by the movement amount of the detection head at the object carrying-in position. A detecting means including a magnetic scale for detecting the height, a comparing means for comparing the set height with the detected height, and a removing means for removing the non-standard processed product from the carry-in position, Counting means for counting the number of times the non-standard processed product is continuously carried in; if the number of times is less than 3 times, continue operation of the device; if the number of times is 3 times or more, A high-frequency plug quenching apparatus comprising a workpiece loading control mechanism including operation control means for stopping the operation of the apparatus. 4. The removing means includes a pull-out claw that is movable in the conveying direction of the article to be processed and in the opposite direction, and in the vertical direction.
The device according to the item.