KR100234645B1 - Annealing apparatus - Google Patents

Abstract

The present invention relates to a local annealing device for softening the fusion section after fusion of the neck to the funnel in a continuous production process of the funnel for the CRT, mounted on one side of the transfer device 11 for transferring the funnel step by step Oven assembly including a plurality of ovens (22, 23, 24) for heating the frame (16), the funnel assembly and the fusion of the neck and the neck flare step by step to a differential temperature, the plurality of ovens (22, 23, 24) And a driving means for elevating the oven assembly from the frame to a lowered position for annealing the neck fusion portion of the funnel assembly disposed in the transport apparatus 11 and to a lowered position completely outside the funnel neck portion so that the funnel assembly is transferred to the next step. The neck of the funnel in three stages, that is, preheating, annealing and slow cooling By eliminating the flow stress, the annealing process is carried out efficiently, and the heating and slow cooling furnaces are not necessary, which simplifies the structure of the annealing device, reducing the manufacturing cost and reducing the cost and manpower loss due to maintenance. It works.

Description

Annealing apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annealing apparatus, and more particularly to a local annealing apparatus for annealing a neck to a funnel in a continuous production process of a funnel for a brown tube and then annealing the fusion of the funnel and the neck and the flare of the neck. It is about.

In general, a funnel in which a deflection yoke is mounted on the outer circumference of a CRT is first press-molded with a funnel, then a mole portion of a nubbin is removed, and a neck is inserted and then a boss grinding process is performed. Produced through a series of continuous processes, such as inspecting the neck connection state of the funnel.

The neck junction of the funnel is made by fusion by heating the junction of the funnel and the neck with a burner. When the circumference of the funnel and the neck is rapidly cooled during the subsequent process at room temperature, the heated part of the fusion part and the heated part are not heated. As residual stress is concentrated at the boundary, cracks are generated or it is easily broken by small impacts in the subsequent production process and CRT assembly process. Therefore, a predetermined annealing process is performed to remove or disperse the residual stress concentrated around the neck fusion to prevent this. Do this.

In addition, annealing of the neck flare is necessary because the residual stress exists in the vicinity of the flare of the neck by the rapid cooling after molding, thereby causing brittleness.

The conventional annealing apparatus for such an annealing process is a simple configuration of the patent application No. 95-20946 (annealing apparatus of the funnel assembly) filed in Korea as follows.

In the annealing apparatus of the funnel assembly shown in FIG. 1, the annealing apparatus of the funnel assembly provided to remove residual stress fused to the joining portion when the funnel and the neck are fused, wherein the funnel assembly (1) The cooling furnace (2) is applied to heat the fusion of the funnel and the neck of the fan) to spread the stress, and the air is slowly cooled by injecting air into the funnel assembly (1) continuously installed in the heating furnace (2) and sequentially transferred A slow cooling furnace, a transfer means for moving the funnel assembly 1 into the heating furnace 2 and the slow cooling furnace, and the funnel assembly installed in the heating furnace 2 and linearly moved by the transfer means ( It comprises a rotating means for rotating 1) about the tube axis.

The heating furnace 2 is provided with the heater 2c which is installed in the both sides with respect to the moving direction of the funnel assembly 1, and the lifting means 4 which moves the heater 2c up and down.

The elevating means 4 includes a lead screw 4a having one end fixed to the heater 2c support member 2a, and a worm wheel 4b having a screw formed on an inner circumferential surface of the elevating lead screw 4a. And a worm which is screwed in correspondence with the worm wheel 4b, is installed and includes a worm shaft 4c for rotating the worm wheel 4b, and a motor 4d for rotating the worm shaft 4c. .

In addition, the slow cooling furnace is provided with a cooling fan installed above the funnel assembly 1 to inject air, and a motor for driving the cooling fan via a belt member.

The conveying means integrally connects the pallet 5a on which the funnel assembly 1 is seated and the unspecified plurality of pallets 5a sequentially arranged at regular intervals and is transported along the rail 5b formed in the frame and is infinite. A chain 5c forming a raceway, a drive shaft for connecting and moving the chain 5c to a drive sprocket, a driven shaft for connecting and supporting the chain 5c to a driven sprocket opposite to the drive shaft, and the drive shaft It is provided with a motor which rotates through the chain 5c.

In addition, the rotating means is integrally connected to the pallet (5a) via a spindle and the gear box (5d) for transmitting the rotation of the gear sprocket (5f) to the magnetic force, and the gear sprocket (5f) is seated in a sequential arrangement To the magnetic drive shaft 5g for driving the chain 5e and the magnetic drive shaft 5g via the chain 5e and the magnetic drive sprocket 5h engaged with the chain 5e. A self-driven driven shaft for supporting the self-driven driven sprocket engaged with the chain 5e, and a motor 3 for transmitting rotational force through the chain to the self-drive shaft 5g.

As described above, the funnel assembly 1, on which the neck 1a is fused, is heated while passing through the tunnel 2b of the heating furnace 2 provided with heaters 2c on both sides by a conveying means such as a conveyor, and then adjacent to each other. It is made to be slowly cooled in a separate slow cooling furnace installed to be transferred to a subsequent process.

However, such a conventional annealing apparatus has a conveying means for conveying the funnel assembly 1 in the tunnel 2b of the heating furnace 2, and a heater 2c of the tunnel 2b in the conveying direction of the funnel assembly 1. In order to prevent the heating of the neck 1a portion of the funnel assembly 1 as it is installed on both sides with respect to the non-uniform, it must be provided with a separate rotation means for rotating the funnel assembly 1, it is composed of a complex structure In order to install a large heating furnace 2 and a slow cooling furnace in the production line, it takes up a lot of installation space and has a large cost of equipment, operation, and maintenance. Furthermore, in the tunnel 2b, the funnel assembly 1 Since the composition is different from that of the neck flare 1b, the annealing of the neck flare 1b should be annealed at a temperature different from that of the funnel assembly 1 and the neck 1a. However, the annealing of the neck flare 1b is annealed only at the annealing temperature of the neck fusion part as described above. Annealing of 1b) Is not prevents proper neck flare (9) is the residual stress is continuously remained, there were problems that are easily damaged, even a small impact in the subsequent steps.

Accordingly, the present invention has been made to solve the fundamental problem of the prior art, the purpose of the following process by annealing the neck fusion portion and neck flare of the funnel assembly in a plurality of annealing temperature at each annealing temperature in the funnel transfer device The present invention provides an annealing apparatus which is configured to be automatically transported to a non-complicated simple configuration, and that annealing the funnel can be efficiently performed.

In addition, another object of the present invention is to provide a heater for heating the fusion and neck flare of the funnel assembly and the neck, respectively, which is vertically operated to heat the funnel neck portion at a stepwise temperature without using a separate heating furnace or slow cooling furnace. It is further to provide an annealing apparatus including a plurality of cylindrical ovens provided.

1 is a side cross-sectional view showing a schematic structure of a conventional annealing apparatus of a funnel assembly;

2 is a schematic front view of the annealing apparatus according to the present invention,

Figure 3 is a schematic cross-sectional view showing the oven structure of the present invention annealing apparatus,

4 is a side view schematically showing a state of use of the annealing apparatus of the present invention.

<Explanation of symbols for main parts of drawing>

10: annealing device 11: transfer device

12 slot 13 base plate

15 support member 16 frame

18 (46): Pneumatic cylinder 22 (23,24): Oven

20: guide member 21: mounting member

26 housing 27 holder

28: heater 29: temperature sensor

31 funnel assembly 32 neck portion

33: roller 34: electric power

42: protrusion 43: axis

In order to achieve the above objects, the present invention provides a frame mounted on one side of the transfer device for transferring the funnel assembly stepwise, the upper heater and the lower portion to heat the fusion portion and the neck flare of the funnel assembly and the neck to the differential temperature An oven assembly including a plurality of cylindrical ovens each having a heater inside and adapted to receive a lower portion adjacent to the neck fusion portion of the funnel, and a lowering position for annealing the neck fusion portion of the funnel disposed in the transfer apparatus; It provides an annealing device, characterized in that it comprises a drive means for lifting up and down in the frame to the lifting position completely out of the funnel neck portion so that the funnel is transferred to the next step.

In the present invention as described above, the neck portion of the funnel assembly disposed at a predetermined position provided on the base plate by raising and lowering the plurality of ovens in three stages, that is, preheating, annealing and slow cooling in turn to the neck fusion portion and the neck flare. The annealing process is performed efficiently by removing residual stresses, and the separate structure of the annealing device is not necessary because separate heating furnaces and slow cooling furnaces are not required, which greatly reduces the manufacturing and construction costs, and reduces the cost and manpower loss due to maintenance. As a result, the production cost of the funnel can be reduced.

EXAMPLE

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention as described above in more detail as follows.

2 is a front view schematically showing that the annealing device 10 of the present invention is mounted on a conveying device 11 for conveying a funnel assembly, and FIG. 3 is a schematic cross-sectional view showing the oven structure of the present annealing device. 4 is a side view schematically showing a state of use of the annealing apparatus of the present invention, respectively.

On the other hand, the transfer device 11 is the most suitable structure for using the annealing device 10 of the present invention, "applicant of the brown tube funnel filed by the applicant of the present application in the domestic patent application No. 51752 (1996. 11.04) Apparatus ", and the structure and operation of the transfer apparatus in order to aid the understanding of the present invention annealing apparatus is described in the specification and drawings.

As can be seen from this, in the present invention, the annealing apparatus 10 of the present invention, which is mounted on the central side of the conveying apparatus 11, has a vertical frame 16 fixed to the conveying apparatus 11, and the frame On the upper surface of 16, a pneumatic cylinder 18 is mounted such that the piston rod 17 is advanced upward for driving the oven assembly described later.

A bracket 19 is fixed to an end of the piston rod 17, and two guide members 20 are installed in the bracket 19 so as to penetrate the plate above the frame 16 downward, thereby providing a pneumatic cylinder 18. The bracket 19 slides perpendicularly to the base plate 13 according to the operation of. Three ovens 22, 23, and 24 are spaced apart from each other on the mounting member 21 mounted at the end of the guide member 20 to be integrally assembled above the base plate 13 of the transfer device 11, thereby providing an oven. Configure the assembly.

Here, the mounting member 21 is provided with an adjustment screw 25 to adjust the height of the plurality of ovens (22, 23, 24).

The plurality of ovens 22, 23, 24 are respectively preserved and supported by a cylindrical housing 26 and holders 27, 27 'fixed to the inner upper and lower portions thereof, as shown in FIG. It comprises an annular upper heater 28 and the lower heater 28 ', the temperature sensor 29, 29' is mounted adjacent to each of the heaters to measure the upper and lower temperatures of the interior space of the housing 26, The funnel assembly 31 inserted into the housing 26 and the adjacent portion including the fusion portion 30 of the neck 32 are heated to a predetermined temperature. That is, the upper heater 28 heats the flare portion of the neck and the temperature sensor 29 senses the temperature to control the operation of the heaters 28, 28 ', while the lower heater 28' By heating the neck fusion unit 30 and sensing by the temperature sensor 29 ', the fusion unit 30 and the flare of the neck 32 are respectively heated to a suitable annealing temperature,

First, the oven 22 heats the neck fusion and flare of the funnel cooled to room temperature for preheating to the annealing temperature, and the oven 23 is at the neck fusion and flare of the preheated funnel assembly 31. The residual stress is maintained at an annealing temperature to remove residual stress. In the last oven 24, when the annealed funnel assembly 31 is transferred directly to a subsequent process through the oven ovens 22 and 23 sequentially, it is exposed to room temperature and rapidly cooled. The neck 32 of the funnel assembly 31 is heated to maintain a constant temperature so as not to be quenched so as to slowly cool the thermal stress to prevent residual stress from occurring again.

First, the lower heater 28 ′ of the oven 22 is heated to about 600 ° C. to preheat the neck welded portion of the funnel to about 550 ° C., while the upper heater 28 is heated to about 550 ° C. to flare the neck. Preheated to about 500 ° C, and the preheated funnel assembly 31 is then maintained at about 450 ° C by maintaining the neck flare at about 450 ° C by the lower heater 28 'of about 450 ° C in the oven 23. The upper heater 28 maintains the neck flare at about 430 [deg.] C. to anneal it to remove residual stresses generated in the previous process.

Meanwhile, in the last oven 24, the upper heater 28 is heated to about 200 ° C. so that the neck flare heated to about 430 ° C. in the intermediate oven 23 is slowly cooled without being quenched when exposed to room temperature, and the lower heater ( 28 ') is heated to about 250 ° C to slow the neck fusion to prevent residual stress even when exposed to room temperature during transfer to the subsequent process.

To this end, temperature sensors 29 and 29 'are mounted adjacent to the upper heater 28 and the lower heater 28' to measure the temperatures of the heaters 28 and 28 'and to interrupt the power supply. , 24) to keep the temperature exactly.

As such, the necked fusion portion and the neck flare of the funnel assembly 31 are differentiated in consideration of the difference in their composition, that is, the annealing at the appropriate annealing temperature, respectively, removes the residual stresses of the necked fusion portion and the neck flare to generate cracks. It does not prevent brittleness.

The conveying apparatus to which the annealing apparatus of the present invention is mounted includes a supporting member 15 disposed below the slot 12 of the base plate 13 and the supporting member, as shown in FIGS. 2 and 4. A plurality of rollers 33 supporting the movable members horizontally, and a motor 35 provided on an upper portion of the frame while driving the transmission means 34 coupled to one side of the supporting member to move the supporting member 15 horizontally. And two guide members 38 extending downward through the mount 37 fixed to the support plate 36 of the frame and a strut 39 coupled to the lower end thereof, and connecting the rollers 33 to each other. The support bracket 41 coupled to the shaft 40, the shaft 43 extending in the longitudinal direction in the conveying device 11 and fixed at both ends, and the protrusion 42 engaged with the strut 39 protrudes laterally. The connecting member 45 and the conveying apparatus 11 which are formed and rotatably mounted to the shaft 43. Is provided on the side consists of a pneumatic cylinder 46 of the piston rod 44 is connected to the rotation connection member 45.

The support member 15 disposed below the base plate 13 is lifted to protrude from the malleable slot 12, and the funnel assemblies in the lower base plate are picked up and then horizontally picked up. It moves and moves the funnel assemblies one step at a time, and lowers it lower than the base plate to repeat the operation of returning to the original position.

Hereinafter, the process of annealing the funnel assembly in which the neck portion is fused in the annealing apparatus of the present invention will be described.

In the state where three funnel assemblies 31 are spaced apart at predetermined intervals from the base plate 13 of the conveying device 11, the pneumatic cylinders 18 of the frame 16 operate to operate a plurality of ovens 22, 23 and 24 are lowered to energize heaters 28 and 28 'of ovens 22, 23 and 24 with neck 32 and adjacent funnel portions received in ovens 22, 23 and 24. And annealing by heating at a predetermined temperature for a predetermined time, as described above, in particular in the last oven 24, while the neck 32 portion of the funnel assembly 31 is cooled from about 430 ° C. to about 200 ° C. gradually Allow it to cool to avoid thermal stress.

As such, when the funnel annealing is completed, the pneumatic cylinder 18 operates to elevate the ovens 22, 23, and 24, while the pneumatic cylinder 46 is operated to retract the piston rod 44 in the advanced state. The protrusion 42 rotates counterclockwise together with the connecting member 45 to raise and lower the strut 39 and the support bracket 41, and the roller 33 having the support bracket 41 and the shaft 40 coupled thereto is provided. As it is elevated, the support member 15 is elevated above the base plate 13 in the slot 12, and the funnel assembly 31, which is disposed on the base plate 13 and annealed, is placed on the elevated support member 15. Will be placed. In this state, as the motor 35 operates to drive the transmission means 34 such as a chain or a belt, the supporting member 15 coupled thereto moves horizontally one step, so that the set temperature at the last oven 24 The funnel assembly 31, which has been slowly cooled to about 250-200 ° C., is moved to a transfer roller 47 disposed adjacent thereto for subsequent processing.

Meanwhile, first, the funnel assembly 31 preheated to about 550 to 500 ° C. in the oven 22 is moved to a position for annealing at about 450 to 400 ° C. by the intermediate oven 23, and the first, oven ( The base plate 13 corresponding to 22 is conveyed and disposed with the funnel assembly 31 for annealing and then annealing the neck 32 to the funnel assembly 31 in the previous step.

As described above, after the funnel assemblies 31 are moved one step at a time, when the motor 35 is stopped and the piston rod 44 of the cylinder 46 is advanced, the protrusion 42 together with the connecting member 45 is moved. The support bracket 41 is rotated clockwise to lower the support member 15, and thus the support member 15 is also lowered into the slot 12 of the base plate 13 so that the funnel assembly 31 is placed on the support member 15. These are all arranged at a predetermined position on the base plate 13.

As such, when the supporting member 15 is lowered, the pneumatic cylinder 18 is operated again so that the plurality of ovens 22, 23, and 24 are lowered to insert the neck portion of the funnel to undergo annealing and slow cooling processes. When the support member 15 retracts from the roller 33, that is, moves to an initial position, and the process ends, the support member 15 is raised and lowered as described above. ) Step by step.

Accordingly, the funnel assemblies 31 are disposed on the base plate 13 and subjected to some annealing and slow cooling in the plurality of ovens 22, 23, 24, and then the ovens 22, 23, 24 are elevated. At the support member 15 is raised and horizontally advanced to transfer the funnel assemblies 31 step by step and back down, the funnel assemblies 31 of the support member 15 are placed on the base plate 13, and then the oven ( 22, 23, and 24 are lowered again to perform the annealing and slow cooling process, and at the same time, the support member is horizontally retracted in the lowered state and a series of operations for returning to the initial position are automatically and continuously performed.

As described above, according to the present invention, the neck portion of the funnel disposed at a predetermined position provided on the base plate 13 by raising and lowering the plurality of ovens 22, 23, 24 is preheated, annealed and By annealing, the annealing process is efficiently performed by removing residual stresses in the neck fusion section and neck flare, which simplifies the structure of the annealing device without the need for a heating furnace and a slow cooling furnace, resulting in cost savings and manpower. The loss is reduced, reducing the cost of funnel production.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention and the invention belong within the scope without departing from the spirit of the present invention. Various changes and modifications will be made by those skilled in the art.

Claims (4)

The frame mounted on one side of the conveying device 11 for transferring the funnel assembly 31 stepwise, the fusion unit and the neck flare of the funnel assembly 31 and the neck are heated stepwise to the differential temperature (22, Oven assembly mounted to move up and down in the frame 16, including a plurality of 23, 24, and the lower position and the funnel assembly (31) for annealing the neck fusion of the funnel disposed in the conveying device 11 the oven assembly And drive means for lifting up and down the frame to a lifting position completely out of the funnel neck portion such that the transfer to the next step. According to claim 1, wherein the drive unit is equipped with a pneumatic cylinder (18) in the upper portion of the frame 16, the piston rod 17 is advanced upward, the end of the piston rod (17) bracket (19) Is fixed, the bracket 19 is provided with two guide members 20 penetrating downward through the upper frame 16 to slide vertically with respect to the base plate 13 in accordance with the operation of the pneumatic cylinder (18) When the oven assembly is integrally assembled to the mounting plate 21 fixed to the end of the bracket 19 vertically upwards of the base plate 13 of the transfer device 11, the piston rod of the pneumatic cylinder 18 is moved forward and backward. Annealing apparatus, characterized in that configured to move up and down. The oven assembly of claim 1 or 2, wherein the oven assembly is a preheating oven 22 for heating the neck fusion portion and flare of the funnel cooled to room temperature to an annealing temperature, and the neck fusion portion and flare of the preheated funnel. When exposed to room temperature before transferring the annealing oven 23 to heat the neck of the funnel to maintain the annealing temperature so that the stress is removed and the funnel assembly 31 annealed in the ovens 22 and 23 to a subsequent process. And an anneal oven (24) for heating the neck portion of the funnel to anneal the funnel neck portion at the annealing temperature so that thermal stress does not occur. 4. The ovens 22, 23 and 24 are each formed in a cylindrical housing 26 and an annular upper heater 28 and a neck fusion welded portion of the funnel, which are provided on an inner upper portion thereof to heat the flare of the neck. An annular lower heater 28 'for heating, and temperature sensors 29 and 29' mounted adjacent to each of the upper and lower heaters to heat the neck flare and the neck fusion unit to a predetermined temperature, and measuring the temperature of the heater. Annealing apparatus, characterized in that.

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