JPS60241959A - Device for confirming amount to be supplied of powdery material - Google Patents

Abstract

PURPOSE:To measure accurately the amt. to be supplied of a powdery material by providing a pair of window parts to an introducing pipe of the powdery material, and piercing the introducing pipe through the main body of a device for confirming the amt. to be supplied so that the window parts may be faced to the hermetic space formed in the main body. CONSTITUTION:A powdery material 5 which is supplied into a receiver member 12 by a metering device 7 from a hopper 6 is charged into an introducing pipe 17 while being vibrated with the ultrasonic energy of an ultrasonic vibrator 13, passed through the introducing pipe 17 by the conveying action of an inert gas from a pipe 4 and the gravitational action, transported to a plasma torch 18, and supplied into plasma arc 41. Accordingly, the powdery material 5 of high- hardness metal, etc. is enclosed into the plasma arc 41, and uniformly dispersed into a melt part 43. A pair of opposed windows 17a and 17a are formed at a part of the introducing pipe 17, and the luminous energy of light passing through the window 17a is measured to obtain the amt. of supplied powdery material 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for checking whether a predetermined amount of powder material, such as metal powder, is being transported through an introduction pipe.

As a means of forming a hardened layer with excellent properties such as wear resistance and pitting resistance on a part of the surface layer of cast iron parts such as camshafts, a part of the surface layer is remelted with a plasma torch and the molten part is heated. The applicant has previously proposed a method in which a high-hardness metal powder is added through an inlet pipe and then rapidly cooled to form a remelted hardened layer with excellent wear resistance.

In the remelting hardening process, in order to keep the hardness of the hardened layer constant and obtain a processed product with no variation, metal powder must always be supplied to the molten part at a constant rate.
It is necessary to check the amount of metal powder fed through the introduction tube.

As a device for this purpose, the introduction tube is made of a transparent material,
A device that shines light into this introduction tube and measures the amount of light transmitted or reflected. A device that detects the amount of powder material in the introduction tube using a magnetic sensor. Alternatively, a device may be used that measures the amount of powder material by measuring vibrations caused by the powder material flowing through the introduction pipe.

However, in the case of a device in which the introduction tube is made of a transparent material, powder material adheres to the inner surface of the introduction tube over time, resulting in a large difference between the actual amount of powder material supplied and the amount of transparent acid or reflection. There are drawbacks to doing so. Additionally, devices that use magnetic sensors have the problem of being limited in the amount of powder material they can transport, and devices that measure vibrations are dependent on the particle size of the powder, making it impossible to obtain an effective vibration level.

The present invention has been made in view of the above-mentioned points, and has [1]
The aim is to be able to accurately measure the supply amount of powder material (conveying vinegar) regardless of the type of powder material and without causing errors over time when transporting powder material using an introduction pipe. An object of the present invention is to provide a powder material supply amount confirmation device.

In order to achieve this object, the present invention forms a pair of windows in the introduction tube for powder material, and inserts the introduction tube into the main body of the supply amount confirmation device so that the windows face the closed space formed in the main body of the supply amount confirmation device. Further, the main body is provided with a light-emitting member facing one of the windows and a light-receiving member facing the other window, and the pressure inside the sealed space is higher than that of the introduction pipe. It is said that

Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a cross-sectional view showing a part of a remelting hardening processing apparatus to which the powder material supply amount confirmation device according to the present invention is applied, and (1) in the figure is a powder material delivery device; Equipment (1
) has an additional introduction pipe (4) for supplying inert gas such as argon gas into the box (2) on the bottom plate (3) of the sealed box (2), and powder material is added to the bottom plate (3) of the sealed box (2). The hopper (6) for storing (5) is Rn. Here powder material (5)
For example, Cr, Mo, Ni, W, V or Nb
A simple substance or a compound of high hardness metal such as powdered metal.

Then, the leaking one-shaped part of the hopper (6) comes out ++ (8a
) On the F side, 31 Kuma Soso N (7) made of powder material is installed.

This vI measure device (7) has a turntable (10) attached to the h end of the rotating shaft (9) of the motor (8) facing inside the box body (2), and a turntable (10) attached to one side of the peripheral edge 1 of the turntable (10). Equipped with a measuring plate (11) whose position can be adjusted in 11 horizontal directions.

By rotating the turntable (10) in the horizontal direction, the powder material (5) deposited on the turntable (10) is scraped off by a certain amount M, and is dropped into the receiving member (12). Further, a measuring plate (Ill) whose position is adjustable from 1-down is arranged on one side of the turntable (10) facing the measuring plate (11),
1- of the powder material (5) supplied and deposited on the turntable (!0) from the output (6a) by this measuring plate (Ill).
I'm trying to smooth out the situation. Here, the supply amount of the powder material (5) is adjusted by lowering the weighing plate (11) and
11) and the turntable (10) J-plane, or by adjusting the clearance between the measuring plate (11) and the turntable (10).
) or move (Ill) to turntable (10
) by adjusting the positional relationship with

The lower half of the receiving member (12
) is the vibrator (14) of the ultrasonic vibrator (13).
It is attached to. That is, the vibrator (14) has a passage (15
) is installed vertically, and the lower end of the receiving member (12) is fitted into the four large diameter portions formed at one end of the passageway (15). Further, a joint (1G) having an inverted V shape is fitted into the four large diameter portions formed at the lower end of the passageway (15). Here the passage (1
5), the inner diameter of the lower half of the receiving member (12), and the inner diameter of the passage formed in the joint (16) are set to be equal.

In addition, each of the bifurcated pipe parts (lea) and (!6a) of Join) (1B) has a powder material introduction pipe (
+? ).

One end of (17) is connected. This introduction tube (17) is made of stainless steel or ceramic material, and the other end is a shield cap (19) of the plasma torch (18).
) is held through. Here the shield cap (19)
The extension line of the introduction tube (17) and the extension line of the passage (21) for plasma gas blowing (-1) formed in the nozzle tip (20) are set so that they intersect at the lower position while the nozzle tip (20) is held in the position. do.

Furthermore, a powder material supply amount confirmation device M (22) according to the present invention is attached to the middle portion of the introduction pipe (17).

This supply amount confirmation device (22) is shown in FIG. 2, which is a longitudinal sectional view.
As shown in detail in FIG. 3, which is a partially enlarged view of FIG. 2, and FIG. 4, which is a sectional view taken along line A-A in FIG. (24), (24) is formed, and large diameter holes (25), (2B) are provided vertically in the upper and lower parts of the main body (23), and these large diameter holes (25)
, (2B) are communicated through a small diameter hole (27). In addition, ice holes (28), (28) are bored in the protrusions (24), (24), one end of which opens into the small diameter hole (27), and the other end of which opens to the outside. Furthermore, the upper end of the large diameter hole (25) and the lower end of the lower one-force hole (26) have tapered parts (25a) and (28a) that expand outward in diameter, and the small diameter hole ( A similar taper part (27a) is also provided at one end of 27).
is formed.

Then, the sealing plugs (29) and (30) are pushed into the tapered parts (25a) and (26a) from the outside, and the threaded parts are carved on the outer periphery of the 1, end and lower end of the main body (23). The lid members (31), (32) are screwed onto the body (23), and the sealing plugs (29), (30) are held in the state pushed into the main body (23) by these lid members (31), (32). Close here
, 1 River stoppers (29) and (30) have through holes (28a) and (30a) for press-fitting and holding the introduction pipe (17), and lid members (31) and (32) have through holes (28a) and (30a) for holding the introduction pipe (17). Holes (31a) and (32a) are formed with larger diameters than the through holes (29a) and (30a) of the sealing plugs (29) and (30).
By screwing the lid members (31) and (32) with the introduction tube (17) penetrating and held in a), the introduction tube ( 17) is held. In addition, when inserting the introduction tube (17) into the main body (23), a pair of windows (17a) and (+7a) formed on the introduction tube (17) are formed on the projections (24) and (24). so that it faces the horizontal holes (28) and (28).

In addition, the horizontal holes (28) and (28) are provided with tubular sealing plugs (
33), (33), and then screw the lid members (34), (34) from the outside, and then close one of the sealing frames (33).
An optical fiber (36) led out from a light emitting element f-(35), which is a light emitting member, is press-fitted into the through hole (33a) formed in the other sealing plug (33).
An optical fiber (38) led out from a light-receiving element (37), which is a light-receiving member, is press-fitted into a), and the ends of these optical fibers (3B) and (38) protruding from the sealing plug (33) are connected to the introduction tube. (17) window (17a), (+?a)
I try to face them with a slight gap between them.

Furthermore, a large diameter hole (25) is provided in the side wall l; of the main body (23).
) is attached to the back pressure gas supply pipe (38) facing the large frame hole (26), and a leaking powder material discharge pipe (40) facing the large frame hole (26) is attached to the lower part of the side wall.

Next, the operation of the apparatus constructed as described below will be explained. First, the powder material (5) supplied from the hopper (6) to the receiving member (12) by the oxygen meter Ff (7) is vibrated by the ultrasonic energy of the ultrasonic vibrator (13) and passes through the introduction tube ( 17), the inert gas from the pipe (4) attached to the bottom plate (3) passes through the introduction pipe (17) by the transport action of the pipe (4) and the action of gravity, and is transported to the plasma torch (18), where the plasma arc ( 41) supplied inside. Then,
Powder materials (5) such as high hardness metals are plasma arc (41)
The cast iron member (42) is encapsulated in the melted part (43) at high temperature and high speed, and is uniformly dispersed or melted in the melted part (43).

On the other hand, in the powder material supply amount confirmation device (22), a pair of opposing windows (1?a) and (+7a) are provided in a part of the introduction pipe (17) inserted into the main body (23). The light emitting element (35) is formed through these windows (17a) and (+?a).
Since the optical fiber (36) from the light receiving element (37) and the optical fiber from the light receiving element (37) are facing each other, the window (17a).

By measuring the amount of light passing through (17a), powder material (5
) supply amount can be known. Here, the main body (23)
There is a window (+7a) inside the sealed space (S) and the introduction pipe (17).
) and (17a), but an inert gas such as argon gas is supplied into the closed space (S) through a back pressure gas supply pipe (39), and the closed space (S)
Since the pressure inside the inlet pipe (17) is higher than that in the introduction pipe (17), powder material leaking from the windows (+7a) and (17a)
5) is a very small amount, and the leaked powder material (5) is discharged to the outside via the discharge pipe (40) and recovered.

Here, without providing the discharge pipe (40), the backpressure gas supplied from the supply pipe (39) is passed through the windows (17a) and (+?a) of the introduction pipe (17) into the introduction pipe (17). It is also possible to prevent the powder material from leaking out from the windows (17a) and (17a) by merging the powder material with the windows (17a) and (17a).

Furthermore, the end faces of the optical fibers (3B) and (38) have windows (
17a) and (17a), the powder material (5) will not adhere to the end faces of the optical fibers (3B) and (38), and the measured values will not be distorted over time.

In addition, in the embodiment, an example was shown in which the supply amount confirmation device according to the present invention is applied to a remelting and hardening treatment device for cast iron members using a plasma arc, but the device of the present invention is not limited to this, and can be applied to various devices that convey powder materials. Alternatively, a light emitting element and a light receiving element may be directly provided in place of the optical fibers (313) and (38).

As explained in the section below, according to the present invention, the amount of powder material fed through the introduction pipe can be accurately measured without causing any errors over time, regardless of the type of powder material. The device itself has a simple structure, is advantageous in terms of space, and has many other effects.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a part of a remelting and hardening processing apparatus to which the powder material supply amount confirmation device according to the present invention is applied, FIG. 2 is a longitudinal sectional view of the same powder material supply amount confirmation device, and FIG. The figure is an enlarged sectional view of the main part, and FIG. 4 is a sectional view taken along the line A-A in FIG. 3. In addition, drawing tlff (+) is a powder material delivery device, (5) is a powder material, (17) is an introduction pipe, (lea) is a window part, (22
) is the powder material supply amount confirmation device, (33) is the main body, (25
), (2B) is a large diameter hole, (27) is a small diameter hole, (28
) is a horizontal hole, (29). (30) and (33) are sealing plugs, (36) is a light emitting member,
(38) is 1 light receiving member. Patent Applicant: H Giken T Gyo Co., Ltd. Agent, Patent Attorney, Part 1, Patent Attorney, Kuni Ohashi, Department, Patent Attorney, Yu 2 Koyama ・Continued Yu 111E (Spontaneous) June 1985, 1911 Patent Application No. 59-070679 2, Name of invention Powder material supply amount confirmation device 3, Relationship with the case of the person making the amendment Patent 11j Applicant (532) Hon RN Giken Kogyo Co., Ltd. 4, Agent Minato-ku, Tokyo Azabudai 2-4-5 108 Masonic 39 Mori Building 2nd Floor 5, Amendment Order [1 attached voluntary

Claims (1)

[Claims] A pair of windows are formed in a part of an introduction pipe for conveying powdered materials such as metal powder, and the part with these windows faces the closed space inside the cylindrical body, and the pair of windows are formed inside the cylindrical body. A light-emitting member facing one of the windows and a light-receiving member facing the other of the pair of windows are arranged in the cylindrical body, and the pressure in the sealed space is maintained higher than the pressure in the introduction pipe. A powder material supply amount confirmation device characterized by connecting a back pressure gas supply pipe.