JP2001152241A - Method and apparatus for supplying fixed quantity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for precisely supplying a fixed quantity capable of successively supplying a prescribed quantity of a work to a heat treatment furnace. SOLUTION: A fixed quantity supply apparatus, which is provided with a cutting device to successively supply an object to be heat treated in a prescribed quantity to the heat treatment furnace. The cuffing device is provided with a cylindrical body and a magnet rotation drive means to rotate a magnet along the inner peripheral surface of the cylindrical body. Further, the apparatus can be provided with a weighting device to weight the object to be heat treated transported from the cutting device and a feeder equipped with a vibrator to supply the object to be heat treated to the cutting device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quantitative supply apparatus and a quantitative supply method capable of sequentially supplying a predetermined amount of an object to be heat-treated (hereinafter also referred to as "work") to a heat treatment furnace at a predetermined time.

[0002]

2. Description of the Related Art As shown in FIG.
In order to sequentially supply the hoppers, a rabbit hopper 102 whose upper end is inclined toward the downstream side of the conveyance is generally used.

[0003] First, as shown in FIGS. 5A and 5B, a rabbit hopper is provided between a feeder 105 provided with a vibrator (not shown) and a transfer path 109 to the heat treatment furnace 104 side. A fixed blade 102A is provided at the front and rear of the rabbit hopper 102 so as to have an upper end inclined toward the downstream side of the conveyance.

[0004] Next, with the rabbit hopper 102 lowered, the work 103 smoothed by a vibrator (not shown) is supplied from the feeder 105 to the groove 106 at the upper end of the rabbit hopper 102. And FIG.
(A) and FIG. 6 (a), the rabbit hopper 1
When 02 rises, the work 103 in the groove 106 is sent to the groove 107 of the fixed blade 102A. Next, FIG.
As shown in (a), when the rabbit hopper 102 descends, the work 103 in the groove 107 is sent to the groove 108. The work 103 in the groove 108 is shown in FIG.
As shown in (a) and (a) and (a) of FIG. 6, the rabbit hopper 102 is then supplied to the transfer path 109 to the heat treatment furnace 104 by rising.

In this manner, as shown in FIGS. 6A and 6B, the amount of the work 10 is substantially equivalent to the volume of the groove 108.
By supplying the workpiece 103 to the transfer path 109 on the heat treatment furnace 104 side, a substantially constant amount of the work 103 is successively supplied to the heat treatment furnace.

[0006]

However, the work 103
Is a powder, it is also possible to always measure a constant amount by the groove 108, but the work 103 is not a powder,
In addition, since the work 103 has various shapes, the work 103 may be caught or bitten by the rabbit hopper 102 or the fixed blade 102A, or the work 103 may be caught by each other. Therefore, it was difficult to always send a fixed amount of the work 103 to the groove 108. Therefore, a fixed amount of the work 103 is often not supplied to the heat treatment furnace 104.

Further, when the work 103 is large, it is necessary to adjust the fixed quantity supply device 101 according to the type of the work 103, such as replacing the rabbit hopper 102 and the fixed blade 102A with correspondingly large ones.
Each time, the work of the operator was troublesome, so that the workability was very poor.

Further, usually, after the heat treatment by the heat treatment furnace 104, the weight of the work 103 is measured for product delivery, etc., but before the supply to the heat treatment furnace 104, the accurate weight of the work 103 is not measured. Therefore, it was not possible to confirm whether or not the total weight of the work 103 was the same before and after the heat treatment. Therefore, the heat treatment furnace 10
Even if a residual product of the work 103 is generated during the transportation of the work 103, such as inside the feeder 4 or the feeder 105, it cannot be easily detected.

Therefore, when successively heat-treating different kinds of workpieces, the workpieces are supplied to a conveyor (not shown) at a larger interval than usual, and the time required for the transport is utilized to determine From the supply device 101 to the heat treatment furnace 104
It has been checked whether or not any remaining product has been generated due to the work 103 being caught, bitten or spilled down in each part of the process. However, this is one in which the worker checks each part one by one, and the work efficiency is extremely low.

Accordingly, an object of the present invention is to provide a quantitative supply apparatus and a quantitative supply method capable of sequentially supplying a predetermined amount of a work 103 accurately to a heat treatment furnace.

[0011]

According to a first aspect of the present invention, there is provided a quantitative supply apparatus for sequentially supplying a predetermined amount of an object to be heat-treated to a heat treatment furnace in order to effectively achieve the above object. , The cutting device is characterized by comprising a cylindrical body and magnet rotation driving means for rotating a magnet along the inner peripheral surface of the cylindrical body.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the quantitative supply device further includes a weighing device for weighing the object to be heat-treated transferred from the cutting device. I do. According to a third aspect of the present invention, there is provided a quantitative supply device.
Or a feeder provided with a vibrator for supplying an object to be heat-treated to a cutting device in addition to the configuration described in 2 above.

According to a fourth aspect of the present invention, there is provided the fixed-quantity supply method, wherein the object to be heat-treated is subjected to magnetic force of a magnet rotating along an inner peripheral surface of a cylindrical body of a cutting device provided on a transfer path for transferring the object to a heat treatment furnace. While the heat-treated material is sequentially conveyed, the heat-treated material conveyed by the cutting device is measured by a measuring device, and when a predetermined weight is reached, the rotation of the magnet of the cutting device is stopped to stop the conveyance of the heat-treated material. This is a method of supplying a predetermined amount of the heat treatment target to the heat treatment furnace.

The heat treatment furnace means a furnace for performing heat treatment such as quenching, tempering, annealing, and normalizing.
The object to be heat-treated means an object to be heat-treated such as mechanical parts such as bolts, nuts and gears, processed metal materials such as tools, jigs and dies, and metal materials such as structural steel.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a quantitative supply device according to the present invention. FIG. 1 illustrates an outline of an apparatus related to one heat treatment furnace (hereinafter, referred to as a heat treatment apparatus unit) among continuous heat treatment apparatuses in which heat treatment furnaces such as a quenching furnace and a tempering furnace are continuously arranged. FIG. FIG. 2 is an explanatory side view schematically showing the quantitative supply device according to one embodiment of the present invention.

In the drawing, reference numeral 1 generally indicates a fixed-rate supply device. The fixed-quantity supply device 1 weighs the weight of a magnet rotor 3 (cutting device) that sequentially cuts out a predetermined amount of work (not shown) and supplies the work to the heat treatment furnace 2, and the work sequentially transferred from the magnet rotor 3. And a weighing device 4.

As shown in FIG. 2, the magnet rotor 3 is made of a stainless steel cylinder 5 whose cylinder core is perpendicular to the workpiece transfer direction (the direction of the arrow b in FIG. 2). A magnet rotation driving means 6 for rotating the magnet 7 along the inner peripheral surface of the cylindrical body 5 is provided. The magnet rotation driving means 6 includes a magnet 7 rotating along the inner peripheral surface of the cylindrical body 5, a support blade 8 for supporting the magnet 7, and a support blade 8.
A shaft body 9 is provided at two angles of 0 degrees and rotates around the cylinder core of the cylinder body 5 as a rotation axis, and a cutting motor (not shown) for rotating the shaft body 9 is provided. Note that the magnet 7 is a permanent magnet.

The weighing device 4 includes a pan 11 having a weighing shutter 10 and a weighing machine 12 that weighs the weight of the work carried into the pan 11 together with the weight of the pan 11. Although not shown, the receiving tray 11 has a substantially box shape with two open sides, that is, an upper surface and a transfer inlet side surface, and is disposed on the weighing machine 12 in a state inclined toward the transfer direction. A metering shutter 10 is provided on the side of the transport outlet, and the metering shutter 10 is pivotally installed around an opening / closing shaft 10A by an air cylinder (not shown) so that the tray 11 can be rotated. The transfer outlet side is provided so as to be openable and closable in two stages of fully open and fully closed.

The weighing machine 12 is a load cell having a built-in strain gauge. The pan 11 of the weighing device 4
A cleaning conveyer 25 is disposed at a position where the measuring shutter 10 is opened and receives the work carried out, and the work is further conveyed to the heat treatment furnace 2 side.

The quantitative supply device 1 as described above is used by being disposed in a continuous heat treatment device as shown in FIG.
The outline of the continuous heat treatment apparatus will be described below. In order to sequentially supply a predetermined amount of work to the heat treatment furnace 2, the heat treatment apparatus unit A
, A first feeder 24, a magnet rotor 3, a weighing device 4, a cleaning conveyor 25, a cleaning device 26, a second
It includes a feeder 27, a conveyor belt 28, and a heat treatment furnace 2.

The transfer device 22 includes a dedicated can 21 containing a work.
Is mounted on a trolley (not shown).
The ascending reversing machine 23 is arranged adjacent to the downstream end of the carrying machine 22.
When the exclusive can 21 is raised together with the bogie, the ascending reversing machine 23 lifts and inverts only the exclusive can 21 so that the work can be supplied to the first feeder 24.

The first feeder 24 is formed so as to be inclined in three steps toward the downstream side of the conveyance, and the work is flattened by being vibrated by a first feeder vibrator 24A provided on the back side. It is configured to be conveyed while being shaped. Further, the first feeder 24 is provided with a first feeder inlet work sensor 241, a supply gate 242 provided to be openable and closable by an air cylinder (not shown), and a first feeder outlet work sensor 243. . The supply gate 242
Are arranged so that a gap of about 30 to 50 mm is generated in the closed state.

The magnet rotor 3 of the fixed quantity supply device 1 is disposed near the leading end of the first feeder 24 on the downstream side of the conveyance. In addition, the weighing device 4 moves the position adjacent to the magnet rotor 3, that is, the work
Is disposed at a position where it is sent to the tray 11.
The cleaning conveyor 25 is arranged such that when the measuring shutter 10 of the measuring device 4 is opened, a work is supplied to one end 25A thereof, passes through the cleaning device 26, and is conveyed to the heat treatment furnace side. .

The second feeder 27 is provided with the cleaning conveyor 2.
5 is disposed at a position for receiving a work supplied from the other end 25B of the fifth work 5. Like the first feeder 24, the second feeder 27 is formed so as to be inclined in three steps toward the downstream side of the conveyance, and is vibrated by a second feeder vibrator 27A provided on the back side. Thus, the work is conveyed while being flattened.

The second feeder 27 is closed and closed by a second feeder work sensor 271, a work stop shutter 272 provided to be openable and closable by an air cylinder (not shown), and a motor (not shown). A supply damper 273 is provided which can be freely opened and closed in four stages of opening 1, opening 2, and full opening. The conveyor belt 28 is provided so as to receive the work sent from the second feeder 27 and pass through the inside of the heat treatment furnace 2.

Next, the operation of the fixed-quantity supply apparatus 1 according to the present invention will be described by also explaining the operation of the continuous heat treatment apparatus for convenience of explanation. First, the dedicated can 21 containing the work is transported by the transport unit 22 to the ascending and reversing machine 23 while being placed on a trolley (not shown). Only the can 21 is lifted and inverted by the ascending reversing machine 23,
The work contained in the exclusive can 21 is put into the first feeder 24.

Next, the work in a piled state, which has been thrown into the first feeder 24 by the ascending and reversing machine 23, is vibrated by the first feeder vibrator 24A so that the work is flattened by an arrow b. Transported in the direction of In addition, since it is formed in a step shape,
There is no going back over each step.

At the same time as the first feeder 24 vibrates, the cutting motor starts rotating the shaft 9 in the direction of the arrow c (see FIG. 1), thereby moving the magnet 7 to the inner periphery of the cylindrical body 5. It is rotated in the direction of arrow c (see FIG. 1) along the plane.
Then, the work attracted by the magnetic force of the magnet 7 is conveyed along the outer peripheral surface of the cylindrical body 5 with the rotation of the magnet 7 and sent to the measuring device 4.

The magnet rotation drive means 6 is stopped by a limit switch (not shown) once, once, several times, or several times. And every time the stop, the weighing device 4
Weighs the work in the pan 11. For example, the cutout amount (Kg / time) of the weighing device 4 is set to 5 kg / time, and the work transfer amount of the magnet 7 of one pole of the magnet rotor 3 is set to 3Kg.
Assuming g, the magnet rotation driving means 6 stops once or twice per rotation, and every time the rotation is stopped, the measuring device 4 weighs the workpiece sent.

The speed of the vibration of the first feeder 24 changes as follows. That is, if the first feeder entrance work sensor 241 sensing the work is kept OFF for 5 seconds, the vibration speed is switched to the medium speed. Then, when the first feeder entrance work sensor 241 is turned ON, the vibration speed is switched to a low speed. These operations are automatically performed, and continue similarly while the magnet rotor 3 is rotating. The frequency of the first feeder vibrator 24A during low-speed operation is 22 Hz, the frequency during medium-speed operation is 40 Hz, and the frequency during high-speed operation is 60 Hz.
Hz and the balance weight are set to 60%.

The weighing device 4 weighs the weight of the workpiece sequentially sent. When the weight of the workpiece exceeds a preset value, the operation of the magnet rotor 3 is stopped and the measured value is stored.

Then, the measuring shutter 10 is opened, and the weighed work in the tray 11 is sent to the cleaning conveyer 25 through the vibrator (not shown), and is sent to the cleaning device 26. When the work is conveyed through the cleaning device 26 by the cleaning conveyor 25, the work is cleaned by spraying cleaning water from above onto the work in a shower shape. Then, the cleaned work is scattered and supplied to the second feeder.

The work supplied to the second feeder is sent while being leveled by the action of the second feeder vibrator 27A. Then, the work stop shutter 272 provided in the second feeder 27 checks the head of the work, and the work is moved to the second feeder 2.
7 on top. When a predetermined time elapses after the completion of this procedure, the work stop shutter 272 is opened, and the work is sent onto a transport belt running through the inside of the heat treatment furnace 2.

When a workpiece is sent, a leading prevention device (not shown) forms a predetermined gap. The opening degree of the advance prevention device has two stages, and is determined in advance according to the length of the work. The time interval until the start of the next rotation of the magnet roller 3 is determined based on the weight weighed by the weighing device 4 by an arithmetic expression described later.

By repeating these operations, the work cut out by the predetermined amount by the quantitative supply device 1 according to the present invention is sequentially supplied to the heat treatment furnace 2.
The frequency of the second feeder vibrator 27A during low-speed operation is set to 35 Hz, the frequency during high-speed operation is set to 60 Hz, and the balance weight is set to 90%. FIG.
Is an explanatory view illustrating one heat treatment apparatus unit A, but the other heat treatment apparatus units operate in substantially the same manner to supply a workpiece and perform heat treatment.

The quantitative supply device 1 according to the present invention is capable of automatic operation for measuring and supplying the weight of a work, and semi-automatic operation for supplying even without weighing in case of failure of the weighing device. However, the specific operation contents are shown in FIGS. 3 and 4.

Here, "Each damper (four locations)" of "automatic operation conditions" in FIG. 3 and "semi-automatic operation conditions" in FIG.
Indicates four members of the supply gate 242, the measuring shutter 10, the work stop shutter 272, and the supply damper 273. “NO.1F” means “first feeder”, and “NO.2F” means “second feeder”.

The work supply amount during automatic operation is set as follows. First, the processing amount W per hour
(Kg / h) is set on a touch panel (not shown).
Next, a reference cutout amount (set weight value of the weighing device 4) P (Kg / time) of the weighing device 4 is set on the touch panel.

Then, the standard cut-out standby time T
(Seconds), that is, after the weight of the work sent to the receiving tray 11 exceeds the set weight value of the weighing device 4 and the magnet roller 3 is stopped, the weighing shutter is opened and the work is ejected. Is calculated by the following equation. T = 3600 × P ÷ W For example, assuming that the processing amount per hour W = 1000 Kg and the cutout amount P = 5 Kg / time, the cutout standby time becomes:
T = 3600 × 5 ÷ 1000 = 18 (seconds) is required.

In the actual operation, since the weight is supplied in excess of the set weight (a standard cutout amount), if the weighed weight at this time is QKg, T = 3600 × Q ÷ W. That is, the processing amount per hour is 1000 kg / h.
And the standby time T of the magnet rotor 3 when the weighing device 4 weighs 10 kg is as follows. T = 3600 × 10 ÷ 1000 = 36 Therefore, after 36 seconds, the magnet rotor 3 starts the next supply.

The setting of the work supply amount during semi-automatic operation is performed by setting the rotation time t of the magnet rotor 3 and the operation standby time T. The setting of the rotation time t and the operation standby time T is performed using a touch panel (not shown). Note that these set values are determined and determined in actual operation.

The fixed-quantity feeding device 1 configured as described above
According to this, since the work is supplied by using the magnet rotor 3 that attracts and supplies the work by the magnetic force of the magnet 3, even if works such as bolts are caught on each other,
The work can be forcibly pulled out and supplied by the magnetic force of the magnet 7. Therefore, a constant amount of work can always be supplied.

Since the work is attracted and conveyed by the magnetic force of the magnet 7, if the supply of the work exceeds the set weight value and the rotation of the magnet rotor 3 is stopped, the work being conveyed is stopped. Can be stopped instantaneously. For this reason, a predetermined amount of work can be supplied more accurately. Therefore, since uneven burning is unlikely to occur in the heat treatment furnace 2, extremely high accuracy is obtained, for example, as a so-called security part such as a bolt and a nut used for an automobile engine and a bolt and a nut used for mounting a tire. However, it is possible to cope with heat treatment.

Further, the supply amount to the heat treatment furnace 2 can be easily changed only by changing the set weight value of the measuring device 4. For this reason, there is no need to make adjustments such as exchanging members of the apparatus 1 every time the type of the workpiece to be heat-treated changes, and the work efficiency is improved.

Further, by measuring the exact weight of the work before being supplied to the heat treatment furnace 2, it is possible to confirm whether or not the weight of the work matches before and after the heat treatment. It is possible to easily confirm whether there is no drop-off or catch.
Therefore, even when different types of workpieces are successively heat-treated, different types of workpieces can be easily prevented from being mixed.

In addition, since the accurate supply amount of the work to be supplied to the heat treatment furnace 2 can be ascertained, the time until the heat treatment of all the works currently scheduled for heat treatment is completed can be accurately ascertained. Therefore, it becomes easy to schedule heat treatment start time of the work to be heat-treated next, and to prepare the work.

The quantitative supply device 1 according to the present invention is not limited to the above configuration, but may have the following configuration. That is, although the fixed-quantity supply device 1 in this embodiment includes the magnet rotor 3 and the weighing device 4, the device may not include the weighing device 4. According to this embodiment, even if the workpieces are caught on each other, the workpieces can be forcibly pulled out and supplied by the magnetic force of the magnet 7, or the supply can be stopped instantaneously even for the workpieces being transported. Can be achieved.

The support blade 8 of the magnet rotor 3
The shape is not limited to a plate shape, and may be any shape such as a ladder shape as long as it can support the magnet 7. The material is not limited to stainless steel, but may be other metals, synthetic resins, or wood.

The magnet 7 of the magnet rotor 3 is not limited to a permanent magnet, but may be an electromagnet formed by an electric coil. Furthermore, the weighing machine 12 is not limited to a load cell incorporating a strain gauge as described above as long as it can weigh the weight.
A load washer incorporating a spring displacement type load sensor or a quartz type pressure sensor may be used.

Further, the continuous heat treatment apparatus provided with the fixed quantity supply device 1 is not limited to the above-mentioned one, and may be one without the cleaning device 26, for example. Alternatively, the work may be manually supplied without the transfer device 22 or the upside-down reversing device 23 being provided. In the above embodiment, the feeder 24 provided with the vibrator 24A is provided in the heat treatment apparatus unit A, but may be provided in the quantitative supply apparatus 1.

[0051]

According to the quantitative supply device 1 according to the present invention,
Since the heat treatment object is attracted and supplied by the magnetic force of the magnet and supplied using a magnet rotor, the heat treatment object is forcibly pulled out and supplied by the magnetic force of the magnet even if the heat treatment objects such as bolts are caught on each other. be able to. Therefore, a constant amount of the object to be heat-treated can always be supplied.

Further, since the object to be heat-treated is attracted and conveyed by the magnetic force of the magnet, if the supply amount of the object to be heat-treated exceeds the set weight value and the rotation of the magnet rotor is stopped, the medium being conveyed is stopped. The supply of even the heat-treated object can be stopped instantaneously. For this reason, it is possible to more accurately supply a predetermined amount of the object to be heat-treated.

Further, the supply amount to the heat treatment furnace can be easily changed only by changing the set weight value of the measuring device. Therefore, there is no need to make adjustments such as replacing members of the apparatus every time the type of the object to be heat-treated changes, and the work efficiency is improved.

Further, by measuring the exact weight of the object to be heat-treated before being supplied to the heat treatment furnace, it is possible to confirm whether or not the weight of the object to be heat-treated before and after the heat treatment is the same. It is possible to easily check whether or not the heat-treated object is spilled or caught on the way. Therefore, even when heat treatment of different types of heat treatment objects is successively performed, it is possible to easily prevent different kinds of heat treatment objects from being mixed.

In addition, since the accurate supply amount of the heat treatment object to be supplied to the heat treatment furnace can be ascertained, the time until the heat treatment of all the heat treatment objects currently scheduled for heat treatment is completed can be accurately grasped. it can. Therefore, it becomes very easy to schedule heat treatment start time of the heat treatment object to be heat treated next and to prepare the heat treatment object.

[Brief description of the drawings]

FIG. 1 is an explanatory side view schematically showing a continuous heat treatment apparatus provided with a fixed quantity supply device according to one embodiment of the present invention.

FIG. 2 is a side view schematically showing a quantitative supply device according to one embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of the continuous heat treatment apparatus provided with the fixed quantity supply device according to the embodiment of the present invention during automatic operation.

FIG. 4 is a flowchart showing an operation of the continuous heat treatment apparatus provided with the quantitative supply device according to one embodiment of the present invention at the time of semi-automatic operation.

FIG. 5 is an explanatory diagram showing an outline of a conventional quantitative supply device.

FIG. 6 is an explanatory diagram showing an outline of a conventional quantitative supply device.

[Explanation of symbols]

 1: fixed amount supply device 2: heat treatment furnace 3: magnet rotor (cut-out device) 4: weighing device 5: cylindrical body 6: magnet rotation driving means 7: magnet 24: first feeder (feeder) 24A: first feeder vibrator ( Vibrator)

Claims (4)

[Claims] 1. A fixed-quantity supply device having a cutting device for sequentially supplying a predetermined amount of an object to be heat-treated to a heat treatment furnace, wherein the cutting device includes a cylinder and a magnet attached to an inner peripheral surface of the cylinder. A fixed-quantity supply device characterized by comprising a magnet rotation driving means for rotating. 2. The fixed-quantity supply device according to claim 1, further comprising a weighing device for weighing the weight of the heat-treated object transported from the cutting device. 3. The fixed-quantity supply device according to claim 1, further comprising a feeder provided with a vibrator for supplying the heat treatment target to the cutting device. 4. A cutting device is provided on a transfer path through which a heat treatment object is transferred to a heat treatment furnace, and the heat treatment object is successively separated by a magnetic force of a magnet rotating along an inner peripheral surface of a cylindrical body of the cutting device. While being transported, the object to be heat-treated transported by the extracting device is measured by a measuring device, and when the weight reaches a predetermined value, the rotation of the magnet of the extracting device is stopped to stop the transport of the object to be heat-treated. A fixed-quantity supply method for supplying a fixed quantity of heat-treated objects to a heat treatment furnace.