JPS61143513A - Method and device for vacuum heating - Google Patents

Abstract

PURPOSE:To subject efficiently a material to be heated to a vacuum heat treatment such as hardening by putting said material which is heated in a vacuum heating chamber through a holding part into a cooling part provided successively thereunder and cooling the material via the powder which is fluidized by the gas admitted into the chamber. CONSTITUTION:The material to be heated (a) on a table 7 is carried through an aperture 5 provided with a cap material 6 into the holding part 2 in a vacuum heating device 1 provided successively with the holding part 2 and the vacuum heating chamber 3 and cooling part 4 on one side underside thereof. the material (a) is then carried through a communicating port 19 provided with a partition cap material 20 into the vacuum heating chamber 3 by a receiving carriage 8 having a base plate 9 and an arm rod 10. The material is again ejected to the pat 2 after the vacuum heating. The material (a) at the high temp. is carried by a lifting mechanism 15 having a lifting frame 13 into the cooling part 4 in succession thereto an is cooled by the powder 27 which is fluidized by the gas introduced through a gas inflow chamber 24 on a gas distributor 23. The material (a) subjected to the cooling and hardening is taken out through the part 2 by the above-mentioned mechanism 15.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vacuum heating method and a vacuum heating apparatus in which a vacuum-heated material to be heated is cooled and hardened by flowing powder.

(Prior art) A vacuum heating device that heats a material to be heated under vacuum by cooling it with gas and quenching it, or a vacuum heating device that cools the material to be heated with oil and quenches it (for example, Japanese Patent Publication No. 11-Jφ11). is already known.

(Invention b = problem to be solved) However, the vacuum heating device that cools with gas has poor cooling ability.
Even if pressurized gas is used, the cooling capacity does not increase much. And pressurized gas? If used, the cooling chamber must be made of a pressure-resistant structure, which may impose restrictions on the structure and construction, which is disadvantageous as it will cause an increase in price.

Also, vacuum heating equipment that cools with oil can be expected to have sufficient cooling capacity, but the oil molecules scattered during processing flow into the vacuum heating chamber and become contaminated, which has a significant negative effect on the degree of vacuum inside the vacuum heating chamber. give. Also, oil b is added to the heated material that has been quenched by cooling.
(Because it adheres, a post-process to remove this oil is required.

(Problem? Determined means to solve it) The present invention has been proposed in view of the above T1. Is there a vacuum heating chamber on one side of the holding section? They are arranged side by side so that they can be opened and closed, and a cooling section is installed below the holding section, and the material to be heated Y heated in the vacuum heating chamber is supplied to the cooling section. Heated material? Cooled and heated material? After sufficiently cooling and quenching, it is discharged from the holding section to the outside.It features a vacuum heating method and a vacuum heating chamber on one side of the holding section. In addition to being installed side by side so that it can be opened and closed, is there a cooling section below the storage section? Is there a gas inflow chamber that is connected in series and is separated by a gas distribution plate below the cooling section? Form a holding section and a gas inflow chamber? Connected by a connecting duct provided with a pro-ar, powder is supplied to the cooling section so as to be placed on a gas distribution plate, and the powder is made to flow by the gas flowing into the gas inflow chamber from the connecting duct. The present invention provides a vacuum heating device having the following characteristics.

(Function) According to the present invention, when the material to be heated heated in the vacuum heating chamber is supplied to the cooling chamber, fine powder whose temperature is controlled is flowing in the cooling chamber, so that the material to be heated is scattered. It is efficiently cooled by contact with the flowing powder and by the gas atmosphere.

(Example) The present invention will be explained in detail below.

The drawing shows an embodiment of the vacuum heating device according to the present invention, in which the vacuum heating device 1 is arranged in a vacuum heating chamber 3 on one side of an airtightly closed holding section. The cooling part p2 is arranged in parallel with the cooling part p2 below the storage part.

There is an opening j% on the side of the holding section 2 facing the vacuum heating chamber 3.
:Have this opening! Lid material 1: Make it openable and closeable. And the opening! Outside the lower edge of the table 7'%:
When the cover member 6 is extended and the opening part j'%: open, the heated member 6 on the table 7? Carry it into the holding department,
Or heated material a in holding section a? Take it out onto table 7.

The material to be heated 6 may be a single object, or may be a number of small items stored in a packet. Also, is the loading and unloading of the heated material α between the table 7 and the holding section 7 mechanical, using a cylinder or the like? Can I use it or a fork?
You can also do it manually by using

A fork-shaped carriage is placed between the above-mentioned holding section λ and cooling section φ! ? position. As shown in FIG. 4, this carrier l has two arm rods lθ and ion extending from the base board, and the support wheels lθ and ion are provided on the edges of the base board, and wheels lλ are provided on the four left and right sides of the base board 2. ...? establish. And the holding part λ
A horizontal guide rail with a U-shaped cross section /Q, /ψ is engaged with the gate-shaped lifting frame /J, which is located inside the board. Cart carrier T? It is supported and attached to the elevating rod /J' to the elevating mechanism tS, which is a vertical cylinder provided on the upper surface of the holding section-1. Further, the tip of the actuating mechanism 16, which is a horizontal cylinder provided at the bottom of the table 7, faces the inside of the holding section downward, and the tip is provided at the upper end of a vertically long plate-shaped guide member 17 provided at the tip of the actuating mechanism 16. It is engaged from above with the hook-shaped locking portion/receiving rod of the 1χ substrate 2 whose bottom surface is open.

Therefore, when the operating mechanism 16 is extended, the carrier r moves forward horizontally while being guided by the guide rails/Q%lda, and when the operating mechanism 16 is contracted, it is guided by the guide rails Lda, Lda and retreats. . In addition, when the lifting mechanism /j extends, the lifting frame /J6 of the receiving carriage r lowers, so that the receiving rod l/ is connected to the locking part /1.
When the elevating mechanism 13 contracts, the elevating rod 13 rises, and when the elevating rod 13 reaches its highest position, the receiving rod engages the locking portion /1 from below.

A communication port/? is provided on the side surface of the vacuum heating chamber 3 facing the holding section λ. Y opened and the communication port/? A partition lid material Jχ that can be airtightly closed or opened is placed on the partition lid material Jχ, and the partition lid material J is attached to an opening/closing mechanism col shown as a vertical cylinder.

Further, inside the vacuum heating chamber 3, there is installed a cradle into which the arm rod of the cradle t can be inserted and removed by 6%.

The cooling section 1A described above is continuous from the storage section 1A, and below the storage section 1A, a gas dispersion plate 2x made of a perforated plate or wire mesh with numerous small holes χ is installed horizontally. The lower side of the gas distribution plate (consists of a gas inflow chamber 2417).

And the upper part of the holding part and the above gas inflow chamber? Connected with a connecting duct, connecting duct) Pro am in the middle of JJ? The gas in the storage section λ is fed under pressure into the gas inflow chamber.

If a heat-resistant powder such as alumina or zircon sand is supplied to the cooling section μ so as to accumulate on the upper surface of the gas distribution plate, a heat exchange member such as a finned spiral pipe may be used. Let it happen.

A temperature detector 30 is connected to the heat exchange member xy temperature adjustment mechanism 9 and is connected to the temperature adjustment mechanism 29.
f Facing the above-mentioned connecting duct.

The vacuum heating apparatus of the present invention has the above-described configuration, and the method for heat-treating the material to be heated αχ using this vacuum heating apparatus is as follows.

First, the material to be heated α is placed on the table 7, and the opening ty is opened by the lid 6. The material to be heated a is suppressed and the opening is opened.
From there, it is moved into the storage section 1 and placed on the arm rod 10 of the carrier truck 1.

Next, the opening part jY is airtightly closed using the lid member 6, and the opening/closing machine s2 raises the partition lid member gy to open the communication part 97, and then the receiving carriage r'x is moved forward by the operation of the operating mechanism 16 to move the receiving carriage r'x forward. Heating material G? It is located inside the vacuum heating chamber 3.

In this case, the arm rod 10 of the carrier l is slightly higher than the pedestal in the vacuum heating chamber 3, so the arm 10 is inserted between the pedestals and the material to be heated G is positioned on the pedestal n. do.

When this condition occurs, the lifting mechanism IS lifts the lifting frame i.
s2 is lowered slightly, and when the carrier ♂ is slightly lowered and transferred onto the material to be heated αb - the pedestal u, the operating mechanism 16χ is contracted and the carrier ♂ is moved down slightly. While retreating along the guide rails 1 and 2, the opening/closing mechanism 21 opens the partition cover material χ? Up/down communication port/1%: Closed airtight.

In this state, the material to be heated G is inside the vacuum heating chamber 3 and is sealed, so the material to be heated α? Vacuum heating can be performed efficiently.

After heating the heated material ab-nrs sufficiently, raise the partition cover J using the opening/closing mechanism a-no to open the communication port/? t' is released, and the operating mechanism /IY is activated to advance the carriage rt to the inside of the vacuum heating chamber 3. Then, by the lifting mechanism lS, the lifting frame lJ?
When the material to be heated a is placed on the arm rod lO and lifted off the pedestal by the rise of the pedestal car g, the operating mechanism/6? The receiving carriage lr is contracted and retreated along the guide rails /Q, /da, and the material to be heated afjI: the holding part λ is placed inside the holding part layer, and the communication port /9'Jl' is closed with the partition lid material W.

Next, the gas is sucked into the reservoir 8 (inside air connection duct 12) and pumped into the gas inflow chamber, and then is ejected to the bottom of the cooling section by the gas dispersion blade. The heat-resistant powder 27 becomes fluidized by this ejection of gas.

Next, by operating the elevator groove, the elevator frame is lowered into the inside of the Jχ cooling section. When the lifting frame/, 7 descends,
Since the receiving carriage t on which the heated material a is placed also engages with the receiving rod locking part itr from below when the b-1 receiving carriage t descends into the cooling section≠. The carriage 1'L can be lowered as it is.

When the material to be heated α on the carrier is positioned in the cooling section DA as described above, the material to be heated α comes into contact with the flowing powder and the cooling section ≠? It is efficiently cooled by the rising gas. In addition, the inside of the cooling section and holding section becomes high temperature b due to the heat of the heated material a (this temperature is detected by the temperature detector 30, and the temperature control mechanism causes a flow of refrigerant to the heat exchange member 2g). Therefore, the temperature in the cooling section HIRO and the holding section λ can be appropriately controlled.

In this way, the material to be heated cLr is cooled in the cooling section Hiroshi, and when the hole is quenched to the desired state, the proar 26 is activated. Stop and lift/lower by the operation of the lifting/lowering mechanism/J? It rises to the holding part 7g and stops the carriage r from below at the stopper//Y: locking part 7g. Then, the opening part jY: is opened by the lid material t, and the material to be heated in the holding part λ is released. It can be taken out mechanically or manually.

Therefore, the material to be heated is sufficiently heated in the vacuum heating chamber 3, and is effectively cooled by the flowing powder in the cooling section μ to be hardened.

The apparatus and method of the present invention described above are examples, and are the contents described in the claims? You can change it in any way you want as long as you don't deviate from it.

(Effects of the Invention) In summary, according to the present invention, the material to be heated 11 heated in vacuum
: Cooling and quenching is done using fluid powder, so
It can be hardened based on sufficient cooling capacity. And oil in the cooling section? Vacuum heating chamber because it is not used? Contaminated with oil or heating efficiency? To reduce b = no,
Oil adhering to heated material? Work to remove? Not needed.

Therefore, according to the present invention, a vacuum heating method and apparatus with extremely high efficiency (and high practical value) are provided.

[Brief explanation of the drawing]

The drawing shows an embodiment of the vacuum heating device of the present invention.
FIG. 1 is a schematic vertical sectional view, FIG. 2 is a vertical sectional side view of the same, FIG. 3 is a cross-sectional plan view, and FIG. 4 is a partial perspective view. l...Vacuum heating device %Co...Holding section, 3...Vacuum heating chamber, Hiroshi...Cooling section, Co...Gas distribution plate 1.24
1... Gas inflow chamber, K... Connection duct, 26...
Proa, core...powder.

Claims (2)

[Claims] (1) Vacuum heating chambers are arranged side by side so that they can be opened and closed on one side of the holding section, and a cooling section is arranged below the holding section, and the material to be heated heated in the vacuum heating chamber is supplied to the cooling section, Vacuum heating characterized in that the material to be heated is cooled in the cooling section by powder fluidized by the inflowing gas, and after the material to be heated is sufficiently cooled and quenched, it is discharged to the outside from the holding section. Method. (2) Vacuum heating chambers are arranged side by side on one side of the holding section so that they can be opened and closed, and a cooling section is arranged below the holding section, and a gas inflow section is separated by a gas distribution plate below the cooling section. A storage section and a gas inflow chamber are connected by a connecting duct equipped with a blower, and powder is supplied to the cooling section so as to be placed on a gas distribution plate, and the powder is supplied from the connecting duct into the gas inflow chamber. A vacuum heating device characterized in that the powder is made to flow by flowing gas.