JPS6261091B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to equipment that can efficiently heat-treat a coiled object such as a metal strip or wire wound into a coil.

Conventionally, batch-type annealing furnaces such as bell-shaped furnaces have been generally used for annealing coil-shaped materials, but such batch-type annealing furnaces are used for tasks such as attaching and removing covers using cranes, stacking and unloading coil-shaped materials, etc. The disadvantages were that it required complicated work, had poor thermal efficiency, and had poor production efficiency. In order to solve this problem, there is an annealing equipment that uses a roller hearth type continuous furnace (a roller is installed across the furnace surface in the width direction of the furnace, and the coiled material is moved by the rotational drive of the roller). In some cases, it is necessary to move the coiled object back and forth within the furnace during the heating period (referred to as in-furnace oscillation) in order to prevent roller deformation due to high heat and the load of the coiled object. It must be made longer by the width of the round trip,
Furthermore, since the rollers are made of expensive heat-resistant steel and require cooling water to pass through them, manufacturing and operating costs are high, and the cooling water dissipates heat, making it difficult to improve thermal efficiency.

This invention aims to solve the above-mentioned drawbacks, and the entire heat treatment equipment will be described below as an embodiment of the invention.

This heat treatment equipment consists of a rollover device A that overturns a coiled material a in a flat circular position, and a plurality of coiled materials a that have been overturned by the rollover device are lined up on a roller conveyor and are simultaneously heated and placed in a soaking chamber. An in-furnace insertion device B that can be inserted into the furnace; a heating/soaking chamber C that can place a plurality of coiled objects in a series and heat them simultaneously by blowing hot air;
A cooling chamber D where a plurality of coiled objects coming out of the soaking chamber can be arranged side by side and cooled simultaneously by blowing cold air, and a coiled object extracted from the cooling chamber and having a circular planar posture is erected. It consists of a rotating device E.

First, the configurations of the above-mentioned overturning device A and the furnace insertion device B will be explained with reference to FIGS. 3 and 4. This rollover device A has a horizontal shaft 3 rotatably supported on a table 1 by bearings 2, 2, and a rollover table 4 having a rectangular side surface. Constructed to be able to stand up and fall horizontally. A pair of pillows 6, 6 are provided on one side of the roll table 4 so that the coiled object a can be stably placed thereon, and rollers 7, 7, 7... are pivotally supported on the other side. Each roller is linked to a sprocket fixed to the horizontal shaft 3 via a chain 8. The horizontal shaft 3 is linked to a clutch puller 10 via a chain 9, so that when the horizontal shaft 3 rotates due to the transmission, the rollers 7, 7, 7, . . . are driven.
Reference numerals 11 and 11 indicate abutments that hold the rollover table 4 in a horizontally reclined position.

Reference numeral 12 denotes a movable frame, which is a pair of long steel members having a U-shaped cross section and arranged in parallel so that its rear end is located between the abutments 11 and 11, and is pivoted at its front and rear ends, respectively. sprocket 13, 13, 14,
Endless chains 15 and 16 are stretched between the chains 15 and 14, and a pusher 17 is fixed to the chains 15 and 16. The pusher 17 is equipped with wheels 18, 18, and can slide in the movable frame 12 with low friction, and when the chains 15, 16 rotate, the pusher 17 can be moved back and forth. 19, 19 are roller conveyors installed in parallel on both sides of the movable frame,
Among the rollers constituting the roller conveyor, about half of the rollers 20a, 20a, 20a...
... are linked by a chain 21, and a transmission shaft 22
The other half rollers 20b, 20b, 20b...
... is a freely rotating roller. Reference numeral 23 denotes each roller 7, 7, 7 of the roll table 4 and the roller 2.
The power of the motors 0a, 20a, 20a, . The support shafts 25 of the sprockets 14, 14 at the front end of the movable frame 12 are rotatably supported by fixed bearings 26, 26, and the rear end of the movable frame 12 is supported by a cylinder 27 so as to be movable up and down. do. In addition, one end of the support shaft 25 has a transmission wheel 2.
8 is provided, and is linked to a motor 29 with a reduction gear via an endless chain 30. and cylinder 2
7 and tilts the rear end of the movable frame 12 downward as shown by the dashed line in FIG.
It is constructed so that it can sink lower than the conveyance surface of No. 9.

Therefore, as described above, when the cylinder 27 is contracted and the pusher 17 is depressed, the cylinder 5
By extending the rolling table 4 as shown by the dashed line in the figure and turning the horizontal shaft 3 as a fulcrum and rolling it over, the coiled material a, which has been upright on the pillow materials 6, 6, can be moved to the roller 7. ,7,7...Tray b on top
It is supported in a planar circular position via the . Then, the rollers 7, 7, 7, . . . and the rollers 20a, 20a, 20a, . By repeating the above operations, the roller conveyor 19,
After about three turns of the coiled material a are connected on the roller conveyor 19, the cylinder 27 is extended to make the pusher 17 protrude higher than the conveying surface of the roller conveyors 19, 19. Next, the chains 15 and 16 are powered by the motor 29.
By rotating the coils, the pusher 17 can push the coiled objects a, a, a forward and insert them into the heating/soaking chamber C.

The heating/soaking chamber C is constructed with an insulating furnace wall, and the floor is equipped with a narrow roller roller 3 in a cross-sectional frame material.
1, 31... are laid in three rows, and the roller rails 32 are rotatably supported.
The coiled objects a, a, a pressed by the rollers 31, 31, . 33 is the entrance door, and 34 is a cylinder that opens and closes the entrance door by moving it up and down. The heating/soaking chamber C has a size that allows three coiled objects a to be placed side by side in series, and circulation fans 35a, 35b, and 35c are placed directly above the coiled objects a, a, and a, respectively. provided. 36a, 36b, 36c are the respective circulation fans 35a, 35b, 35c and coiled materials a, a, a.
Louvers provided between 37a, 37b, 37
c indicates a motor that rotates each circulation fan. Reference numeral 38 denotes an inner cover provided so as to surround both sides of the coiled objects a, a, and a, and outside the inner cover and inside the furnace side wall, there are inner covers corresponding to the three coiled objects a, a, and a. Radiant tubes 39a, 39b, and 39c are provided as heating sources. Reference numerals 40a, 40b, and 40c indicate recuperators for preheating the combustion air in the burners of the radiant tubes 39a, 39b, and 39c. The circulation fans 35a, 35b, and 35c have rotary blades twisted in opposite directions to each other, and the adjacent ones are connected to the motor 3.
7a, 37b, and 37c to rotate them in opposite directions. That is, for example, the circulation fan 35b in the middle
When rotated clockwise, the circulation fans 35a, 35c adjacent on both sides are rotated counterclockwise;
The rotating blades of each circulation fan are twisted so that the hot air blows uniformly downward from the circulation fans 35b and 35c in the middle and the circulation fans 35a and 35c on both sides.
There is a difference between Therefore, the hot air blown downward from each circulation fan 35a, 35b, 35c passes through the louvers 36a, 36b, 36c and evenly hits the diffused coil-shaped objects a, a, a from the upper surface and heats them. Furthermore, the hot air swirls to the outside of the inner cover 38 on the floor surface, receives radiant heat from the radiant tubes 39a, 39b, and 39c, and ascends through the passage, and the circulation fan 35a,
It is recirculated at 35b and 35c. A thermocouple (not shown) is provided for each circulation fan, and the temperature of the hot air in the heating/soaking chamber can be detected for each circulation fan, and the detection signal is used to connect the corresponding radiant tube. 39a, 39b, 39
Control the amount of radiant heat c. In addition, the reference numeral 41 shown in FIG.
2, and 43 is a purifier. The atmospheric gas sucked by the blower 41 passes through the purifier 43 to remove impurities such as oil smoke, and is heated and heated through the return pipe 44. It is arranged to be returned to soaking room C.

The heating/soaking chamber C and the cooling chamber D are separated by an intermediate door 45. Reference numeral 46 denotes a chain foil for suspending the intermediate door, and by rotating the chain foil, the intermediate door 45 moves up and down to open and close. 47 and 48 are conveyance rollers provided on the heating/soaking chamber C side and the cooling chamber D side of this intermediate door 45;
The conveyance rollers are connected by a chain 49 outside the furnace and rotated by the power of a motor 50.

Next, the cooling chamber D formed subsequent to the heating/soaking chamber will be explained. In the cooling chamber D, conveyance rollers 51, 51, . The conveyance rollers are connected to chains 53, 53... outside the furnace.
are connected to each other and to the motor 50, which is a driving source, so that when the motor 50 rotates, the conveying rollers 51, 51, . The coiled object a can be supported and conveyed via the tray b. The cooling chamber D is also large enough to allow three coiled objects a to be placed side by side in series, and circulation fans 54a, 54b, and 54c are installed on the ceiling of the room directly above the coiled objects a, a, and a. is provided. 55a, 55b, 55c are the respective circulation fans 54a, 54b, 54c and coiled materials a, a,
Looper provided between a, 56a, 56b, 5
6c is a motor for driving each circulation fan. 5
Reference numeral 7 indicates an inner cover surrounding both sides of the coiled objects a, a, a, and 58 indicates a cooler provided outside the inner cover. The circulation fan 54a, 5
Even in the case of this cooling chamber, adjacent blades 4b and 54c have rotating blades twisted in opposite directions, and are rotated in opposite directions by motors 56a, 56b, and 56c. Then, the cold air blown downward from each circulation fan 54a, 54b, 54c is diffused by passing through the louvers 55a, 55b, 55c, and is evenly blown onto the coiled objects a, a, a from the upper surface to cool them. The cold air is circulated to the outside of the inner cover 57, cooled through a cooler 58, and recirculated by circulation fans 54a, 54b, and 54c. Reference numeral 59 shown in FIG. 6 indicates a storage tank for storing atmospheric gas such as non-oxidizing gas, and an ejection pipe 60 is disposed from the storage tank into the cooling chamber D. Reference numeral 61 denotes an atmospheric gas generator, and the atmospheric gas generated here is constantly supplied in small quantities to the heating/soaking chamber C and the cooling chamber D.
A part of it is stored in the storage tank 59 through the compressor 62.

Reference numeral 63 indicates an exit door of this cooling chamber D, and 64 indicates a cylinder that opens and closes the exit door by moving it up and down. On the outside of the exit door 63, a turning device E is provided which operates in reverse to the turning device A, in order to erect the coiled material a extracted from the cooling chamber D one by one.

That is, in the turning device E, a horizontal shaft 67 is rotatably supported by bearings 66, 66 provided on a table 66, and a turning table 68 having a square side surface is supported on the horizontal shaft, and the turning table 68 is a cylinder. It is configured to stand up and fall horizontally by the operation of 69. Turntable 68
Rollers 70, 70, . Therefore, the coiled material a comes out of the cooling chamber D and first passes through the rollers 70, 70.
. . . When the turntable 68 is moved upward and then stands up as shown by the arrow, it is held in an upright state on the pillow materials 71, 71. 72, 72 are abutments.

However, when exchanging the coiled articles a, a, a in each chamber in this heat treatment equipment, the entrance door 33, intermediate door 45, and exit door 63 are opened, and the coiled articles arranged on the roller conveyors 19, 19 are replaced. A, a, a are inserted into the heating/soaking chamber C by advancing the pusher 17, and the tip of the coiled article is inserted into another coiled article a, a, a, which was in the heating/soaking chamber C. Push a into the cooling chamber D. At this time, a large amount of the atmospheric gas in the storage tank 59 is supplied into the cooling chamber D through the jet pipe 60, and the atmospheric gas is flowed to the heating/soaking chamber C to prevent outside air from entering. and conveyance roller 47,
48 and the conveying roller 51 to move the coiled objects a, a, a that were in the heating/soaking chamber C to the center of the cooling chamber D, and move the coiled objects a, a, a that were in the cooling chamber D to the center of the cooling chamber D. a and a are erected one after another by a turning device E and moved to another location by a crane (not shown). The entrance door 33, intermediate door 4
5. The exit door 63 is closed during heating and cooling. Also, at the beginning of heating, the coiled material a,
Oil smoke evaporates from a and a, but it is removed by rotating the blower 41 and circulating the atmospheric gas in the heating/soaking chamber C to the purifier 43.

As explained in the above embodiments, the heat treatment equipment of the present invention has a plurality of rows of roller rails, which are made up of narrow roller rollers rotatably supported on the floor of the heating/soaking chamber, and thereby performs heating and soaking. Because it is configured to support a coil-shaped object inserted into the soaking chamber during heating and soaking, the small-width roller rollers may deform due to high heat and load even without water cooling, unlike the conveyor rollers of conventional roller hearth furnaces. There are advantages such as there is no need for oscillation to prevent deformation, coils can be placed side by side across the length of the furnace, and there is no heat loss from cooling water, resulting in good thermal efficiency. . In addition, a flange is fixed to the circumferential surface of the conveying roller that is connected to the drive source on the floor of the cooling chamber, so that the high-temperature coiled material coming from the heating and soaking chamber can be transferred to the flange. Supported through money. This prevents the conveying roller from being deformed due to heat transfer from the coiled material. As a series of equipment, it becomes possible to heat-treat coiled objects efficiently.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of the entire equipment, Fig. 2 is a vertical sectional view thereof, Fig. 3 is a plan view of the rollover device and the furnace insertion device,
Fig. 4 is a side view of Fig. 3, and Fig. 5 is a side view of Fig. 2.
6 is a sectional view taken along the line Y--Y in FIG. 2. a... Coiled object, A... Rolling device, B... Furnace insertion device, C... Heating/soaking chamber, D... Cooling chamber, E... Turning device, 19... Roller conveyor,
31...Colorola, 32...Colorail, 51
... Conveyance roller, 52 ... Tsubakin.

Claims (1)

[Claims] 1. A rollover device that overturns a coiled object in a flat circular position, and a furnace that can line up a plurality of coiled objects that have been overturned by the overturning device on a roller conveyor and simultaneously insert them into a heating/soaking chamber. An internal insertion device, a heating/soaking chamber in which a plurality of coiled objects can be arranged side by side and heated simultaneously by blowing hot air, and a plurality of coiled objects coming out of the heating/soaking chamber. It consists of a cooling chamber that can be arranged side by side in a series and cools them simultaneously by blowing cold air, and a turning device that stands up the coiled material in a planar circular position extracted from the cooling chamber, and the floor of the heating and soaking chamber is A plurality of rows of roller rails in which narrow roller rollers are rotatably supported are laid on the surface, and conveyance rollers with a flange fixed to the outer periphery are arranged on the floor of the cooling chamber in conjunction with a drive source. Heat treatment equipment featuring: