JP3065583U - Heat treatment equipment - Google Patents

Abstract

(57) [Problem] To stabilize the heat treatment time so that uniform heat treatment can be performed. In addition, the structure is simple and small. SOLUTION: While a turntable 8 is used as a transport means for transporting a heat-treated material W between a heat-treated material input means 4 and a heat-treated material take-out means 5, the turntable 8 rotates together with the turntable 8 and is mounted on the turntable 8. A partition wall 15 that divides the space radially into a plurality of sections and divides the turntable 8 for each section and rotatably supports the turntable 8;
And means for inclining the turntable 8 in front of or above the heat-treated material take-out means 5 to provide the heat-treated material W '
Are slid down at once to discharge. The turntable 8 is supported by, for example, a table support surface of the table guide plate 11, and means for tilting is provided by providing a recess in which the height of the table support surface is lower than a reference height in front of the extracting means 5.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a heat treatment apparatus. More specifically, the present invention relates to a heat treatment apparatus suitable for heat treatment such as tempering and annealing of small heat-treated articles such as coil springs and stop rings.

[0002]

[Prior art]

 Conventionally, as this type of heat treatment apparatus, an apparatus that has a small installation area and is devised so that the heat treatment articles do not overlap or become entangled in the heat treatment process (Japanese Patent Publication No. 53-9562). No. 53-10408, No. 57-27784, and No. 58-15483. A common configuration of these inventions and inventions is that a transfer gutter for transferring an article to be heat-treated from a charging means to a discharging means in a heating chamber is assembled in a three-dimensional spiral shape or an intermittent spiral shape, or The falling part of the gutter arranged above is set at right angles to the receiving part of the gutter arranged below and a step is formed, and it is assembled in a tower shape, and the article to be heat treated is transferred by applying vibration to the transfer gutter. It is to let.

[0003] As a method for improving the above-described method in which vibration is applied to move an object to be heat-treated from a charging means to a discharging means, a disk-shaped turntable is used (Japanese Utility Model Laid-Open No. 3-85459). In the case of this apparatus, the charging means and the discharging means are arranged at an interval of about 180 ° with the turntable interposed therebetween, and the object to be heat-treated is charged toward the center of the turntable. The rotation-preventing plate is moved radially outward on the turntable and discharged to the extracting means. The processed object rotation preventing plate is disposed obliquely on the turntable so as to extend in the tangential direction of the inner peripheral wall so as to contact the inner peripheral wall rising up on the innermost side of the turntable.

[0004]

[Problem to be Solved by the Invention] However, in a heat treatment apparatus having a structure in which vibration is applied to a spiral gutter, there is a disadvantage that the structure of the transfer means must be complicated. In addition, since it is sent by vibration, there is a problem that the sending time is not constant, the heat treatment time varies, and it cannot be set to an arbitrary time.

When a workpiece is placed on a disk-shaped turntable and is rotated and moved, there is a possibility that a difference in heat treatment time may occur between a portion closer to the center of the table and a portion closer to the outer periphery. is there. In other words, the object to be heat-treated on the inside moves in the radial direction even after hitting the treated article rotation prevention plate, and then falls to the shooter as the unloading means, and is discharged immediately after hitting the stop plate. The heat treatment time is longer than that of the heat treatment object placed near the outer periphery of the turntable to be processed. In addition, when the object to be heat-treated is easily rolled, when it is put on the turntable, it may roll and move forward to shorten the processing time.

Therefore, an object of the present invention is to provide a heat treatment apparatus capable of stabilizing the heat treatment time and performing a uniform heat treatment. Another object of the present invention is to provide a heat treatment apparatus having a simple and compact structure.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a heat treatment apparatus having a heat treatment object input means, a heat treatment object discharge means, and a conveyance means for conveying the heat treatment object between these means. While using a table, a partition wall is provided which rotates together with the turntable and divides a space on the turntable into a plurality of sections radially, and divides the turntable for each section and rotatably supports the turntable. In addition, a means for inclining the turntable in front of or above the means for removing the heat-treated material is provided, so that the heat-treated material is slid down at a time and discharged.

[0008] Therefore, heat treatment is performed on the object to be heat-treated accommodated in one section for the same time, and the predetermined heat treatment becomes uniform. For example, a heat treatment object supplied from a heat treatment object supply side such as a coiling device is charged into one section of a turntable which is intermittently or continuously fed in front of a heat treatment material charging means, and is turned on. When is rotated by one section, the object to be heat-treated is put into the next section. At this time, there is a strict difference in the heat treatment time between the heat treatment objects in the same section immediately after the start of charging and immediately before the end of charging, but this has little effect on the target heat treatment. . Then, one block is sent for each tact (intermittent rotation), or it is sent continuously and heat-treated by a predetermined amount, and then it reaches when it reaches the front of or above the treated product removal means. The non-heat-treated material is discharged at once by tilting the turntable of the section. Accordingly, uniform heat treatment can be performed for each section.

According to a second aspect of the present invention, in the heat treatment apparatus of the first aspect, each of the radially divided turntables has an inner peripheral edge or its vicinity in a center housing driven by a motor via a hinge. It is rotatably mounted, and a portion closer to the outer periphery than that is supported by the table guide plate so as to be rotatable along the plate. A concave portion which is lower than the region is provided, and the turntable is lowered by its own weight and inclined in the concave portion. In this case, since there is no means for inclining the turntable on the turntable, there is no danger that the heat-treated product will fall on the turntable and be caught when it is discharged and remain on the turntable. In addition, since the inclination of the turntable is caused by its own weight, there is no fear that the power for tilting the turntable or an excessive load is applied, and the operation can be reliably performed.

[0010]

[Embodiment of the invention]

 Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

1 to 3 show one embodiment of the heat treatment apparatus of the present invention. This heat treatment apparatus includes a furnace body 1 having a heat insulating structure lined with blanket heat insulating material and the like, and a gantry 2 with casters for supporting the furnace body and accommodating a turntable motor and control means. I have. The furnace body 1 has a cylindrical shape, penetrates the peripheral wall thereof, and allows the outside of the furnace and the heating chamber 3 in the furnace to be in communication with each other so that the heat-treated material W can be charged and the heat-treated material W 'can be removed. The heat treatment object input means 4 and the heat-treated object removal means 5 are provided. In the case of the present embodiment, the object-to-be-heated charging means 4 and the heat-treated material discharging means 5 are each constituted by a chute, and are respectively provided at a charging port and a discharging port penetrating the peripheral wall of the furnace body 1. It is not particularly limited. On each of the chutes 4 and 5, a shutter or the like which is opened and closed by the object to be heat-treated W, W 'which slides down is provided as necessary so as to reduce fluctuations in the furnace atmosphere temperature. Further, in the heating chamber 3, a stirring fan 6 and a heating element 7 for stirring the atmosphere in the furnace to increase the heating speed by convective heat transfer are suspended from the ceiling, and a turntable 8 is disposed below the heating fan. Have been. The heating element 7 is arranged so as to communicate with a heat supply source 9 such as a power supply device arranged outside the furnace.

The turntable 8 is radially divided, and its inner peripheral (central) end is rotatably attached to the center housing 10, and a part closer to the outer peripheral side than that, for example, a free end side. The portion closer to the outer peripheral side is horizontally supported by being supported by the table guide plate 11. The center housing 10 is rotatably installed on the gantry 2 and supported by a shaft 12 driven by a motor 13 and rotates at a set speed. The center housing 10 and the turntable 8 which is divided radially and one piece forms a fan shape are connected to each other via a hinge 14 so as to be swingable. That is, an inner peripheral end of a fan-shaped turntable 8 divided via a hinge 14 is swingably attached to an inner wall surface of a center housing 10 having an octagonal planar shape.

On the turntable 8, a plurality of partition walls 15 supported by the center housing 10, rotating with the turntable 8, and radially dividing / partitioning the space on the turntable 8 into a plurality of partitions. Is provided. Each partition wall 15 is arranged on the dividing line of the turntable 8, that is, so as to straddle between the turntables 8 to be divided, and on the turntable 8 so as to form one section for each divided turntable 8. It partitions the space. In the case of the present embodiment, the partition wall 15 has an inverted U-shape, and covers the side edge bent upward of the turntable 8 and passes through a gap between the turntable 8 and the workpiece W or the workpiece W. 'Is provided to prevent falling.

The table guide plate 11 that supports each turntable 8 has a height (reference) that supports the turntable 8 horizontally over the entire circumference excluding a position corresponding to a position before or above the heat-treated material taking-out means 5. This is an annular member having a table support surface 16 having a height Hs). As shown in FIG. 5, the table supporting surface 16 has a recess 17 having a height lower than the reference height Hs at a position corresponding to the position before or above the heat-treated material removing means 5. The outer peripheral side is configured to be inclined so as to sink. The table guide plate 11 is fixed to the furnace body 1 or the gantry 2 or the like with a mounting bracket (not shown).

Although not shown, the gantry 2 rotates and stops the stirring fan 6, rotates and stops the turntable 8, starts and stops the heat supply source (heater) 7, and controls the output of these members. A mechanism necessary for operating the heat treatment apparatus, such as a timer and a timer, is provided.

According to the heat treatment apparatus configured as described above, in synchronization with the automatic supply of a heat-treated article (for example, a coil spring, a stop ring, etc.) from a heat-treated article supply mechanism such as a coiling apparatus (not shown). By operating the heat treatment apparatus, desired heat treatment is stably performed.

First, the heat treatment apparatus sets conditions necessary for the heat treatment. For example, by operating various adjusting mechanisms, the heating chamber 3 is heated to a predetermined temperature by the heating element 7 and the atmosphere in the furnace is stirred by the stirring fan 6 to eliminate the temperature unevenness.

In this state, the object W to be heat-treated is introduced from the article-to-be-heat-treated introduction means 4 and sequentially sent to one section of the turntable 8 in front of or below the introduction means 4. The object to be heated W moves toward the heat-treated object removal means 5 under the set temperature condition by the rotation of the turntable 8. The turntable 8 is rotated intermittently at a predetermined time or continuously at a predetermined speed to provide a predetermined heat treatment time for each heat treatment target W in each section.

When the object to be heat-treated W is rotated to a position in front of the heat-treated material outlet 5, the table support surface 16 of the table guide plate 11 for supporting the turntable 8 is partially rotated, as shown in FIGS. Since the turntable 8 has the concave portion 17 which is gradually lowered, the turntable 8 is inclined downward so that the outer peripheral edge side is lowered, and is discharged to the extracting means 5 at a time as the heat-treated product W '. When the turntable 8 passes through the location, the height of the table support surface 16 of the table guide plate 11 returns to the original reference height Hs, so that the turntable 8 floats and returns to a horizontal state.

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, in the present embodiment, the support of the turntable 8 is performed by directly placing the turntable 8 on the annular table guide plate 11, but the present invention is not particularly limited thereto. The rollers may follow the table support surface 16 of the table guide plate 11 for each of the turntables 8 provided.

Further, in the present embodiment, the turntable 8 is provided so that the outer peripheral side sinks and the heat-treated material W ′ is inclined to the outer peripheral side, but is not particularly limited thereto. A member serving as a rotation center axis, for example, a hinge 14 is arranged in a tangential direction and is inclined by floating on the inner peripheral side, or inclined such that the inner peripheral side sinks and the heat-treated material W 'slides down to the inner peripheral side. May be provided at an arbitrary position between them except for the inner peripheral edge and the outer peripheral edge. In any case, the heat-treated take-out means (chute) 5 is extended and arranged to the lowest point of the turntable 8 so as to receive the heat-treated material W ′ sliding down from the inclined turntable 8. .

Further, hinges 14 (or a rotating shaft) for tiltably supporting the turntable 8 are radially arranged, for example, arranged along the front edge in the rotation direction and in the vicinity thereof, and the rear edge is the table guide plate 11. May be provided so that the heat-treated product W ′ is inclined such that it slides down in the circumferential direction when it is depressed into the concave portion 17 of FIG.

Further, the center housing 10 and each of the divided turntables 8 are connected by a hinge having a return coil spring, and the inner peripheral side of each turntable 8 is projected into the center housing 10. When the turntable 8 held horizontally by the spring force is moved over or forward of the heat-treated material take-out means 5, the end of the turntable 8 protruding into the center housing 10 rides on a fixed cam-shaped projection. It may be tilted by pushing it up or down with a rod that moves in and out by solenoid drive.

The tilting control of the turntable 8 may be controlled by a positive cam such as a groove cam.

[0025]

[Effect of the invention]

 As is apparent from the above description, according to the heat treatment apparatus of the present invention, the turntable is provided on or in front of the heat-treated material removal means for the heat treatment object supplied to one section on the turntable. Since the heat treatment is performed for the same time during the rotation until it is discharged to the outside of the furnace at one time, a uniform predetermined heat treatment can be performed. In addition, since it is a simple structure in which a part of the turntable that passes in front of the object to be heat-treated and the means to take out the object to be heat-treated is inclined, it can be made compact and inexpensive.

According to the second aspect of the present invention, since there is no means for tilting the turntable on the turntable, the heat-treated material is slipped off and is scratched when it is discharged. There is no danger of remaining on the top. In addition, since the turntable is tilted by its own weight, there is no danger of applying power or excessive load for tilting the turntable, and it can be operated reliably. However, since the heat-treated product is delivered to the take-out means on the outer peripheral side of the turntable, there is no need to extend the take-out means deep inside the furnace, so that a simpler and less costly structure can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the heat treatment apparatus of the present invention.

FIG. 2 is a front view of the heat treatment apparatus of FIG.

FIG. 3 is a right side view of the heat treatment apparatus of FIG.

FIG. 4 is an explanatory view showing a tilted state of a turntable in a corresponding section in front of a heat-treated material take-out means;

FIG. 5 is an explanatory view showing a relationship between a turntable and a guide plate in front of a heat-treated material take-out means.

[Explanation of symbols]

 REFERENCE SIGNS LIST 3 Heating chamber 4 Heat-treated material charging means 5 Heat-treated material removal means 6 Stirrer fan 7 Heating element 8 Turntable 10 Center housing 11 Table guide plate 14 Hinge 15 Partition wall 16 Table support surface W Heat-treated material W 'heat treatment Finished thing

Claims (2)

[Utility model registration claims] 1. A heat treatment apparatus comprising: an object to be heat-treated; a means for removing an object to be heat-treated; and a conveying means for conveying an object to be heat-treated therebetween. A partition wall that rotates together with the turntable and radially divides a space on the turntable into a plurality of sections, and the turntable is divided and rotatably supported for each section, and the heat-treated product is further provided. Means for inclining the turntable in front of or above the take-out means, wherein the heat-treated product is slid down at a time and discharged. 2. The turntable, which is radially divided, is rotatably attached to a center housing driven by a motor via a hinge at an inner peripheral edge or in the vicinity thereof, and a portion closer to the outer periphery than the table guide is mounted on the center housing. A recessed portion which is supported by the plate and is rotatable along the plate, and in which the height of the table guide plate is lower than that of the other region at the position of the heat-treated material take-out means; The heat treatment apparatus according to claim 1, wherein the heat treatment apparatus descends by its own weight and inclines.