JPH01312002A - Stock chuting device of ferrous molded parts - Google Patents

Abstract

PURPOSE:To provide the stock chuting device for ferrous molded parts having space- saving constitution without having collision of the ferrous molded parts (work) gliding in an inclined receiving tray by constituting the device in such a manner that said parts are stopped at a prescribed position by the effect of an electromagnet. CONSTITUTION:The electromagnet 2 is energized by the signal from a work passage detecting means 4 to attract and stop the work 12 on the inclined receiving tray 1 when the work 12 gliding on the tray 1 passes along the means 4. The energization to the electromagnet 2 is turned off by a timer and motor 3 is started to rotate an endless belt 10 by which a magnet supporting base 8 supported pivotally on a guide rail 7 is moved to an upper stream side after the electromagnet 2 is energized for the prescribed time. The electromagnet 2 and means 4 mounted by the supporting base 8 are moved to the upper stream side by a prescribed distance in this way and are thereafter stopped. The electromagnet 2 arrives near the upper stream inflow of the tray 1 by repeating the above-mentioned operation. The electrical circuit of the electromagnet 2 is turned off when said magnet presses an upper limit switch 6. A motor 3 is simultaneously driven backward to return the electromagnet 2 to the first position which is on the down stream of the tray 1.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a chute device for collecting workpieces discharged from a forming device or a sintering furnace into a receiving tray when manufacturing iron-based sintered parts. In particular, the present invention relates to a chute device suitable for collecting easily damaged parts such as pressed bodies, injection molded bodies, and sintered bodies.

(Prior art) Conventionally, there have often been methods for collecting green compacts made by pressing ferrous metal powder or sintered compacts thereof into a scoop tray, and operating the machine unmanned while filling the tray. It has been adopted.

In this method, a shoe plate is provided that is not inclined from the pressing surface or the belt surface of the sintering furnace, and the workpiece formed on this chute plate is slid down and collected in a receiving tray. At this time, the workpiece is accelerated. As the workpiece slides downhill, there is a problem in that it collides with the edge of the saucer or the workpiece that arrives first, resulting in damage or damage.

To counter this, methods were used such as installing a baffle plate diagonally to the chute board surface to slow down the sliding, or installing an endless belt downstream of the chute board to temporarily slow down the workpiece and then transfer it to the receiving tray. .

There is also a method of installing a vibrator on the shoe 1 to the plate of a small slope where the work does not move on its own and transferring it by vibration, but none of these methods could be used for works that are easily broken or easily damaged.

(Problem to be solved by the invention) In other words, according to the former chute device provided with the baffle plate,
In particular, when the workpiece is a soft molded body with protrusions, it often comes into contact with other workpieces when rolling down the baffle plate, or hits the shoe 1 against the edge of the plate, causing damage.

In addition, according to the latter chute device using an endless belt, the speed is temporarily reduced at the bell 1, but since the workpiece is pushed by the workpiece when being transferred into the receiving tray, the pressing force gradually increases as the amount increases. There were disadvantages such as deformation and the size of the device due to the endless belt.

(Means for Solving the Problems) The present invention provides a method for swiping steel workpieces using sliding of the workpieces.
The purpose is to provide a chute device for picking in a space-saving configuration that prevents collisions of workpieces, and in order to achieve this purpose, it is designed to be detachable from a workpiece forming device or sintering furnace, etc., and to be installed in an inclined shape. a receiving tray to be attached; a kite rail disposed at the bottom of the receiving tray and having limit switches near both ends; an endless bell I arranged at the bottom of the guide rail and rotated by a motor; a magnet support that is supported by the guide rail, moves parallel to the bottom of the tray as the heald moves, and is equipped with an electromagnet; and a magnet support that projects from the magnet support to the first stream side. together with a workpiece passage detection means protruding toward the surface of the receiving tray;
The present invention includes the work detecting means and a circuit for driving and stopping the electromagnet and the motor based on the signal from the limit switch.

(Function) This device is installed in a tilted manner and detachably at the work discharge part of the forming device or the sintering furnace.

Then, the workpiece slides down on the inclined receiving tray, and when it passes the workpiece passage detection means, an electromagnet is excited based on a signal from the workpiece passage detection means, and the workpiece that has slid down is attracted and stopped by the receiving tray.

The stopping position is at first a place where the work does not collide with the downstream edge of the receiving tray, and from the second time onwards, it is an upstream position where the work does not collide with the first arriving work.

After energizing the electromagnet for a predetermined period of time, the timer turns off the power to the electromagnet, and the motor is started to rotate the endless belt to move the magnet support supported by the guide rail upstream. The electromagnet and workpiece passage detection means mounted on the stand are moved upstream by a predetermined amount and then stopped.

By repeating the above operation, when the electromagnet reaches the vicinity of the upstream entrance of the tray and presses the upper limit switch, the electric circuit of the electromagnet is turned off and the motor is driven in reverse,
Return the electromagnet to its initial position downstream of the saucer.

Furthermore, when the electromagnet or the lower limit switch is pressed, the motor stops and returns to the normal rotation circuit, and the electromagnet and the circuit of the work passage detection means also return to their initial states.

In this way, the sliding workpiece is stopped by the electromagnet that moves at appropriate intervals so as not to collide with the edge of the tray or the workpiece that has arrived first.

(Example) Hereinafter, a detailed explanation will be given based on examples.

FIG. 15 is a cross-sectional view showing the schematic structure of the stock shoe I according to the present invention, and the pedestal is not shown.

The saucer] has edges on three sides, and has a smooth upper surface so that the workpiece 12 can easily slide thereon, and is configured so that it can be placed on an inclined pedestal and replaced easily.

Further, for this tray 1, a non-magnetic thin plate such as resin, non-ferrous metal, or stainless steel is used.

When an iron plate is used, residual magnetism is generated and the workpiece gradually becomes...
, , , , -6-, -, - 12's sliding properties become worse, and a large electromagnet is required because the iron plate forms a magnetic circuit and attenuates the magnetic force.

The installation slope is approximately 1-0 to 25 degrees, which is the angle at which the work 12 naturally slides.

DC electromagnet 2 that moves parallel to the lower surface of the saucer
has both NS and N poles facing the receiver side, and is equipped with a capacitor (not shown). The capacitor has the function of quickly demagnetizing the residual magnetism of the electromagnet and workpiece after the current is turned off.

Further, this electromagnet 2 is attached to a magnet support 8 supported by a guide rail 7 parallel to the upper surface of the receiving tray.
Furthermore, this support stand 8 is fixed to the belt ]O. Therefore, the pulley ]-1- is rotated by the motor 3, and the pulley h
]-〇 is moved by rotation, and thereby the support stand 8 and the electromagnet 2 are moved parallel to the bottom surface G of the receiving tray 1.

This moving mechanism can also be configured with a gear device such as an ohm gear instead of a belt.

The motor 3 is a normal DC motor with a reduction gear that can rotate in forward and reverse directions, but it may also be a pulse motor.

The two lower limit switches 5 and 6 provided near both ends of the guide rail 7 are devices for regulating the movement range of the electromagnet 2.

The work passage detecting means 4 protruding from the upper surface of the tray ]- employs a photoelectric device W4a, and this photoelectric device 4a protrudes upstream from the magnet support 8 described above, and also extends from the upper surface of the tray ]-. It is fixedly attached to the upper end of an arm 9 in the shape of a square that protrudes from the upper end of the arm 9.
It protrudes toward the second surface of the saucer 1 on the first flow side.

The photoelectric device 4 thus detects that the workpiece 1.2 has slid down and has arrived shortly above the electromagnet 2.

Control stages not shown include rectifiers, timers, switches,
The circuit consists of relays, etc.

Next, the operation of the apparatus will be explained using the sequence flowchart shown in FIG.

By operating a switch (not shown) of the device, the electromagnet 2 is stopped downstream of the tray 1- with the switch ◯N (step 20).

When the workpiece 1-2 slides down the tray 1- and passes the phototube device 4a, the workpiece is detected (step 21), the electromagnet 2 is excited, and the timer of the electromagnet 2 is activated (step 22.24).

When the workpiece 12 is attracted to and stopped by the receiving tray 1- on the electromagnet 2 due to the excitation of the electromagnet 2, the excitation reaches a time alarm, the electromagnet 2 is demagnetized, and the workpiece 12 is released (step 2).
4).

Next, as the motor 3 rotates in the normal direction and the endless belt 1-O rotates, the magnet support 8 moves, and the electromagnet 2 and the workpiece passage detection means 4 move upstream above the tray, and a timer detects the first arrival. and the subsequent workpiece 12 is driven by a predetermined amount to prevent rear-end collision, and then stops (step 25
．． 2G, 27).

In step 28, if it is determined that the magnet support 8 is not in contact with some of the limit switches 6, the process returns to step 2 and the process described above (step 2
Steps 1-2 to 27) are repeated, and the workpieces 1-2 are sequentially loaded onto the tray 1.

Meanwhile, in step 28, the upper limit switch 6
If it is determined that the magnet support stand 8 is in contact with the workpiece, the process proceeds to step 2, and an alarm is issued indicating that the workpiece]-2 or the tray 1 is full.

Therefore, perform an operation to stop the alarm (step 30),
After replacing the tray 1 full of workpieces 1-2 with an empty tray, press the switch of this device, and if it is determined that the upper limit switch 6 is not pressed by the magnet support 8, step 31 The process immediately proceeds to step 21-, and the aforementioned works docking work (steps 21 to 27) is completed.

On the other hand, in step 3]-, switch 6 to limit 1.
If it is determined that is being pushed by the magnet support 8,
Since the electromagnetic circuit is turned off and the motor 3 is driven in reverse, the magnet support 8 on the upstream side is moved downstream (step 32). If it is determined from step 3B4 that the lower glue 1-switch 5 is in contact with the magnet support 8 or the abutting mechanism, the process proceeds to step 34, where the motor 3 is stopped and the process returns to step 21. Returning to Step 1, the work will begin.

(Effects) As explained above, according to the configuration of the present invention, the structure is simple and the workpieces can be lined up and stocked one after another without colliding with each other. It is possible to collect easily damaged parts such as these at low cost without damaging them.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of the device according to the present invention, and FIG. 2 is a sequence flowchart explaining the operation of the device. 1... saucer 2... electromagnet 3... motor 4... workpiece passage detection means 5.6... limit switch 7... guide rail N phrase

Claims (1)

[Scope of Claims] A tray that is detachably attached to a work forming device or a sintering furnace, etc., and is installed in an inclined manner; A guide rail that is disposed at the bottom of the tray and has limit switches near both ends. , an endless belt that is placed below the guide rail and rotates by the drive of a motor, and an endless belt that is supported by the guide rail, moves parallel to the bottom of the tray as the belt moves, and is equipped with an electromagnet. a magnet support base formed of a magnet support base, a workpiece passage detection means projecting upstream from the magnet support base and projecting onto the upper surface of the receiving tray, and driving an electromagnet and a motor based on signals from the workpiece detection means and the limit switch. A stock chute device for iron-based molded parts, characterized by comprising a circuit for stopping, and the following.