JP2019184200A - Treatment container and thermal treatment device - Google Patents

Abstract

To provide a treatment container for efficiently agitating treatment objects even if the treatment objects are stored and unevenly distributed on the wall part side.SOLUTION: A treatment container 11 includes a container body 20 having a cylindrical trunk part 31, a tapered cylinder part 33 provided on one axial side of the trunk part 31, and a wall part 32 provided on the other axial side of the trunk part 31. The treatment container 11 has a central axis C inclined so that the wall part 32 side is lower than the tapered cylinder part 33 side when a plurality of treatment objects are charged into the container body 20 through the tapered cylinder part 33, and is rotated around the central axis C when thermal treatment is applied to the treatment objects. The treatment container 11 has vanes 25 for agitating the treatment objects. The vanes 25 are continuously provided ranging from an inner peripheral face 37 of the tapered cylinder part 33 through an inner peripheral face 34 of the trunk part 31 to an inner wall face 38 of the wall part 32.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a processing container and a heat treatment apparatus.

  For example, in order to heat-treat mechanical parts such as pins, rollers, and plates having a diameter of 2 to 3 mm, a heat treatment apparatus including a cylindrical processing container (also referred to as “retort”) is used. A plurality of mechanical parts are accommodated in the processing container, and the mechanical parts are heated by a heater provided around the processing container. At this time, the mechanical component is agitated by rotating the processing vessel around its central axis. Patent Document 1 discloses a heat treatment apparatus including the processing container as described above.

JP 2010-139133 A

  FIG. 11 is a cross-sectional view of a conventional processing container 90. Blades (fins) 99 are provided on the inner peripheral surface of the processing container 90 in order to improve the stirring performance of the workpiece such as machine parts. The processing container 90 includes a first cylindrical body 97 and a second cylindrical body 98 provided on both sides in the axial direction in addition to a container main body 91 for storing and heat-treating an object to be processed. The container main body 91 includes a cylindrical trunk portion 92, a tapered cylindrical portion 93 provided on one axial side of the trunk portion 92, and a tapered shape provided on the other axial side of the trunk portion 92. Wall part 94. The object to be processed is put into the container main body 91 through the cylindrical portion 93 from the first cylindrical body 97 side. The object to be processed that has undergone the heat treatment in the container main body 91 is discharged from the first cylindrical body 97 side through the cylindrical portion 93. A nozzle 96 is provided at the end of the second cylinder 98, and a gas for heat treatment is introduced from the nozzle 96 into the container body 91. The blades 99 for stirring the workpiece are provided on the inner peripheral surface of the trunk portion 92.

  When a plurality of objects to be processed are introduced into the container main body 91 through the cylindrical portion 93, the center axis C is inclined so that the wall portion 94 side is lower than the cylindrical portion 93 side, as shown in FIG. For this reason, in the processing container 90, many to-be-processed objects are biased and accommodated in the wall part 94 side. During the heat treatment, the central axis C is substantially horizontal, and the wall 94 side is slightly lower than the cylinder 93 side. However, even when the processing container 90 is in the above-described posture, the objects to be processed are biased toward the wall portion 94, and therefore, a part of the objects to be processed is not sufficiently stirred, and unevenness is caused in the heat treatment. There is.

  Therefore, the present invention provides a processing container that can efficiently stir the object to be processed even if the object to be processed is contained in a large amount on the wall side, and a heat treatment apparatus including such a processing container. The purpose is to provide.

  The present invention includes a container body having a cylindrical body portion, a tapered tube portion provided on one axial side of the body portion, and a wall portion provided on the other axial side of the body portion. And when the plurality of objects to be processed are introduced into the container body through the tapered cylinder part, a central axis is inclined so that the wall part side is lower than the tapered cylinder part side, and the object to be processed is A processing vessel that rotates around a central axis when heat-treating, and has blades for stirring the workpiece, and the blades move from the inner peripheral surface of the tapered cylindrical portion to the inner peripheral surface of the trunk portion. It is provided continuously through the inner wall surface of the wall portion.

  According to this processing container, since the blades are continuously provided from the inner peripheral surface of the tapered cylindrical portion to the inner wall surface of the wall portion through the inner peripheral surface of the trunk portion, stirring by the blade is also performed on the wall portion side. Increases performance. When the central axis of the processing container is tilted so that the wall side is lower than the tapered cylinder side, and the object to be processed is introduced into the container body through the tapered cylinder part, the object to be processed is largely biased toward the wall side. May be housed. Even in such a case, according to the blade, it is possible to efficiently stir the workpiece.

  The blades are provided on a first blade provided on an inner peripheral surface of the body portion, a second blade provided on an inner wall surface of the wall portion, and an inner peripheral surface of the tapered tube portion. The height of the first blade from the inner peripheral surface is preferably higher on the wall portion side than on the tapered tube portion side. According to this structure, the stirring performance by the blade | wing on the wall part side can be made still higher.

  Moreover, this invention has a cylindrical trunk | drum, the taper cylinder part provided in the axial direction one side of the said trunk | drum, and the wall part provided in the axial direction other side of the said trunk | drum. A container main body, and when a plurality of objects to be processed are introduced into the container main body through the tapered cylindrical portion, a central axis is inclined so that the wall portion side is lower than the tapered cylindrical portion side, and the processed object A processing vessel that rotates about a central axis when heat treating an object, and has a blade for stirring the object to be treated on an inner peripheral surface of the body, and a height from the inner peripheral surface of the blade The wall portion side is higher than the tapered tube portion side.

  According to this processing container, since the blade | wing provided in the internal peripheral surface of the trunk | drum becomes high by the wall part side, the stirring performance by a blade | wing becomes high in the wall part side. When the central axis of the processing container is tilted so that the wall side is lower than the tapered cylinder side, and the object to be processed is introduced into the container body through the tapered cylinder part, the object to be processed is stored in a biased manner toward the wall side. May be. Even in such a case, according to the blade, it is possible to efficiently stir the workpiece.

  It is preferable that the processing container further has a second blade for stirring the object to be processed on the inner wall surface of the wall portion. According to this structure, the stirring performance by the blade | wing on the wall part side can be made still higher.

  Moreover, this invention has a cylindrical trunk | drum, the taper cylinder part provided in the axial direction one side of the said trunk | drum, and the wall part provided in the axial direction other side of the said trunk | drum. A container main body, and when a plurality of objects to be processed are introduced into the container main body through the tapered cylindrical portion, a central axis is inclined so that the wall portion side is lower than the tapered cylindrical portion side, and the processed object A processing vessel that rotates about a central axis when heat treating an object, and is different from the first blade provided on the inner peripheral surface of the body portion for stirring the object to be processed. A second blade provided on the inner wall surface of the wall portion at a circumferential position.

  According to this processing container, since the blades are provided on the wall portion in addition to the trunk portion, the stirring performance is enhanced also on the wall portion side. When the central axis of the processing vessel is tilted so that the wall portion side is lower than the tapered tube portion side, and the object to be processed is introduced into the container body through the tapered tube portion, the object to be processed is largely biased toward the wall portion side. May be housed. Even in such a case, according to the blade, it is possible to efficiently stir the workpiece.

  The processing container includes an introduction pipe provided on the other side in the axial direction of the container body in order to allow gas to pass toward the container body, and the introduction pipe penetrates an opening hole formed in the wall portion. The annular space is provided so as to fill the annular space formed between the opening hole and the gas introduction tip. It is preferable that a ring-shaped member is provided. According to this processing container, when the central axis of the processing container is tilted so that the wall side is lower than the tapered cylinder part side, and the object to be processed is introduced into the container body through the tapered cylinder part, the object to be processed is In some cases, they are housed in a biased manner on the wall side. Even in such a case, when the heat treatment of a plurality of objects to be processed is completed and the objects to be processed are replaced, the objects to be processed remain on the wall side such as being sandwiched in a gap or the like. This can be prevented by the member.

The heat treatment apparatus of the present invention includes the processing container that accommodates an object to be processed, a heating device for heating the object to be processed in the processing container, and a posture changing mechanism that changes an inclination angle of a central axis of the processing container. And a rotation mechanism for rotating the processing container around the central axis of the processing container.
According to the processing container provided in this heat treatment apparatus, the object to be treated can be efficiently stirred, so that the heat treatment performance can be improved.

  Further, the processing container as described above is configured by joining a plurality of members by welding. However, the welded portion (weld seam portion) tends to be a weak point in strength, and the welded portion may cause a decrease in the life of the processing container. Therefore, it is preferable that the welded portion is in a position that is not easily affected by heat. That is, the heat treatment apparatus further includes a wall of a heat insulating material surrounding the container body, and the processing container is provided on one side in the axial direction of the container main body on the input and discharge sides of the object to be processed. A first cylinder projecting from the first wall, and a second cylinder projecting from the second wall of the heat insulating material provided on the other axial side of the container body serving as a heat introduction gas introduction side, The container body has a seamless structure, the container body and the first cylinder are welded and joined at a position near the first wall, and the container body and the second cylinder are It is preferable that the joint is welded in the vicinity of the second wall. According to this processing container, it becomes the structure by which the part with small heat influence was weld-joined. As a result, the welded portion is unlikely to cause a decrease in the life of the processing container. In addition, when a processing container is provided with the said introduction pipe for letting gas pass, this introduction pipe is provided in the inner peripheral side of a said 2nd cylinder.

  ADVANTAGE OF THE INVENTION According to this invention, even if a to-be-processed object is biased and accommodated in the processing container in the wall part side, it becomes possible to stir a to-be-processed object efficiently. As a result, the occurrence of unevenness in the heat treatment can be suppressed.

It is a schematic block diagram which shows an example of a heat processing apparatus. It is sectional drawing of a processing container. It is sectional drawing in the arrow AA of FIG. It is sectional drawing of a processing container. It is sectional drawing in the arrow AA of FIG. It is sectional drawing which shows the modification of the processing container shown in FIG. It is sectional drawing in the arrow AA of FIG. It is sectional drawing of a processing container. It is sectional drawing in the arrow AA of FIG. It is sectional drawing which shows the structure of the axial direction other side of a processing container. It is sectional drawing of the conventional processing container.

[Overall configuration of heat treatment apparatus 10]
FIG. 1 is a schematic configuration diagram illustrating an example of a heat treatment apparatus. The heat treatment apparatus 10 is also called a rotary retort furnace, and is a batch type that heats a workpiece by a predetermined number. Examples of the workpiece include mechanical parts such as pins, rollers, and plates having a diameter of 2 to 3 millimeters. The object to be processed may be other than mechanical parts. The heat treatment apparatus 10 includes a processing container 11 (also referred to as “retort 11”), a heating device 12, a posture changing mechanism 13, a rotating mechanism 14, a heat insulating material 15, a gantry 16, and a frame 17.

  The processing container 11 has a cylindrical configuration that houses a plurality of objects to be processed therein. A specific configuration of the processing container 11 will be described later. The heating device 12 heats an object to be processed in the processing container 11. The heating device 12 includes a heater (electric heater) 12 a provided on the inner side of the heat insulating material 15 (on the side of the container body 20 that is a part of the storage container 11). In the present embodiment, the heater 12 a is provided along the inner surface of the heat insulating material 15. The heat insulating material 15 is configured to surround the container body 20. As the heat insulating material 15, a ceramic fiber aggregate or the like is employed. The heater 12a is provided on a wall other than the first wall 18 on one axial side and the second wall 19 on the other axial side. The processing container 11 and the heat insulating material 15 are mounted on the frame 17. The processing container 11 is supported by the frame 17 so as to be rotatable about the central axis C of the processing container 11. The frame 17 is swingable about the horizontal axis P and is attached to the gantry 16.

  The posture changing mechanism 13 has an actuator 13a. The actuator 13a has a function of expanding and contracting in the longitudinal direction. For example, the actuator 13a may be a pneumatic or hydraulic cylinder, or may be a screw-type extension actuator. One end 13 b of the actuator 13 a is attached to the gantry 16, and the other end 13 c of the actuator 13 a is attached to the frame 17. When the actuator 13a extends, the frame 17 is swung upward. Thereby, the processing container 11 becomes the attitude | position in which the central axis C inclined with respect to the horizontal. When the actuator 13a is shortened, the frame 17 is swung downward. As a result, the frame 17 is placed on the gantry 16 (the central axis C is horizontal).

  The rotation mechanism 14 includes a motor 14a, a speed reducer 14b that decelerates the rotation of the motor 14a, and a power transmission unit 14c that includes a chain and a sprocket to which the output of the speed reducer 14b is transmitted. The sprocket is fixed to a part of the processing container 11, and the sprocket and the processing container 11 rotate integrally around the central axis C. The processing container 11 rotates about the central axis C by the rotation of the motor 14a.

  When a predetermined number of objects to be heat-treated are put into the processing container 11, the posture changing mechanism 13 is set so that the side on which the object to be processed is placed is raised, that is, as shown in FIG. The central axis C of the processing container 11 is inclined with respect to the horizontal so that the first cylinder 21 side of the container is higher. When the workpiece is heated in the processing container 11, that is, during the heat treatment, the central axis C is in a substantially horizontal state. The “substantially horizontal state” includes a case where the first cylinder 21 side is slightly higher than the second cylinder 22 side (the center axis C is inclined at a maximum of 5 degrees with respect to the horizontal). During the heat treatment, the processing container 11 is rotated around the central axis C by the rotation mechanism 14. During the heat treatment, a gas for heat treatment is introduced into the processing container 11 from the second cylinder 22 side of the processing container 11. When heat treatment is performed for a predetermined time, all the objects to be processed are discharged from the first cylinder 21 side. Then, a predetermined number of objects to be processed (to be subjected to a heat treatment next) are put into the processing container 11. As described above, the processing container 11 includes the container body 20, the first cylinder 21, and the second cylinder 22. The 1st cylinder 21 is provided in the axial direction one side (left side in FIG. 1) of the container main body 20 used as the input and discharge side of a to-be-processed object. The second cylinder 22 is provided on the other axial side (the right side in FIG. 1) of the container body 20 that is the gas introduction side for heat treatment.

[About the processing vessel 11]
FIG. 2 is a cross-sectional view of the processing container 11. The processing container 11 is configured by integrating a plurality of members by welding. As the plurality of members, a container body 20, a first cylinder 21, and a second cylinder 22 are included. In FIG. 2, a welded portion between the container main body 20 and the first cylindrical body 21 is indicated by reference numeral 35, and a welded portion between the container main body 20 and the second cylindrical body 22 is indicated by reference numeral 36. In FIG. 2, a part of the heat insulating material 15 (the first wall 18 and the second wall 19) is indicated by a two-dot chain line.

  The container body 20 has a central barrel portion 31 in the axial direction, a tapered cylindrical portion 33 on one axial side, and a wall portion 32 on the other axial side. The trunk | drum 31 has a cylindrical shape and an internal diameter is constant along an axial direction. That is, the body portion 31 has a cylindrical inner peripheral surface 34 centering on the central axis C. A tapered tube portion 33 is provided on one axial side of the body portion 31. The tapered cylindrical portion 33 has a tapered shape in which the inner diameter becomes smaller toward one side in the axial direction. That is, the tapered cylindrical portion 33 has a tapered inner peripheral surface 37. The end 33a on one axial side of the tapered cylindrical portion 33 has a cylindrical shape or a cylindrical shape whose inner diameter increases toward one axial direction. A wall portion 32 is provided on the other axial side of the body portion 31. The wall 32 has an end plate shape that is elliptical or semicircular in cross section including the central axis C. The wall portion 32 has an inner wall surface 38 facing the tapered tube portion 33 side (one side in the axial direction).

  An opening hole 39 is provided in the center of the wall portion 32. As will be described later, the gas introduction tip 24 is provided through the opening hole 39. The wall portion 32 includes a wall main body portion 32a that is elliptical or semicircular in cross section including the central axis C, and a small cylindrical portion 32b that is provided on the other axial side of the wall main body portion 32a. The opening hole 39 is formed in the wall main body portion 32a, and an extension portion of the opening hole 39 toward the other side in the axial direction is an inner peripheral surface of the small tube portion 32b.

  The container body 20 having the body portion 31, the tapered tube portion 33, and the wall portion 32 is made of cast steel. In the present embodiment, the container body 20 has a seamless structure. That is, the trunk portion 31, the tapered cylindrical portion 33, and the wall portion 32 are integrally formed by casting, and there are no seams (weld beads) by welding in the circumferential direction and the axial direction in the middle of the container body 20. One side of the container body 20 in the axial direction, that is, the end 33a of the tapered tube portion 33 is joined to the first tube body 21 by welding (welded portion 35). The processing container 11 penetrates the first wall 18 of the heat insulating material 15 in the vicinity of the welded portion 35. The other axial side of the container body 20, that is, the small cylindrical portion 32b of the wall portion 32 is joined to the second cylindrical body 22 by welding (welded portion 36). The processing container 11 penetrates the second wall 19 of the heat insulating material 15 in the vicinity of the welded portion 36.

  The first cylinder 21 has a tapered shape that expands toward one side in the axial direction. The second cylinder 22 has a cylindrical shape that is a linear shape along the axial direction. The first cylinder 21 and the second cylinder 22 are also made of cast steel. In the second cylinder 22, an introduction pipe 23 is provided for passing a heat treatment gas toward the container body 20. The introduction pipe 23 has a gas introduction tip (nozzle) 24 for ejecting the gas into the container body 20 at the tip on one side in the axial direction. A plurality of ejection holes 24a are formed in the gas introduction tip portion 24, and the gas is ejected from the ejection holes 24a. The configurations of the introduction pipe 23 and the gas introduction tip 24 will be described later.

  A plurality of blades 25 are provided on the inner peripheral surface of the processing container 11. The blades 25 are formed integrally with the processing container 11. That is, the blades 25 are cast simultaneously with the processing container 11. As described above, when the object to be processed is heat-treated, the object to be processed is stirred by rotating the processing container 11, but the stirring property of the object to be processed can be enhanced by the blades 25. A specific configuration of the blade 25 will be described below.

[Description of blade 25 (first form)]
In the form shown in FIG. 2, the blades 25 are provided on each of the inner peripheral surface 37 of the tapered cylindrical portion 33, the inner peripheral surface 34 of the trunk portion 31, and the inner wall surface 38 of the wall portion 32, and these blades 25 are integrated. . That is, the blades 25 are continuously provided from the inner peripheral surface 37 of the tapered cylindrical portion 33 to the inner wall surface 38 of the wall portion 32 through the inner peripheral surface 34 of the trunk portion 31. FIG. 3 is a cross-sectional view taken along arrow AA in FIG. As shown in FIG. 3, a plurality (four in the illustrated example) of blades 25 having a long shape continuously in the axial direction are provided in the processing container 11 at equal intervals along the circumferential direction. These blades 25 all have the same shape.

  A specific configuration of the blade 25 will be further described. The blade 25 includes a first blade (first blade portion) 41 provided on the inner peripheral surface 34 of the body portion 31 and a second blade (second blade portion) provided on the inner wall surface 38 of the wall portion 32. 42 and a third blade (third blade portion) 43 provided on the inner peripheral surface 37 of the tapered tube portion 33. The first blade 41, the second blade 42, and the third blade 43 are connected together (that is, continuing without a break). These blades 43, 41, and 42 are connected in this order from the one side in the axial direction to the other side in the order of the third blade 43, the first blade 41, and the second blade 42. The second blade 42 extends in the radial direction along the inner wall surface 38 of the wall portion 32.

  The height of the first blade 41 from the inner peripheral surface 34 is higher on the other side in the axial direction than on one side in the axial direction. That is, the height of the first blade 41 from the inner peripheral surface 34 is higher on the wall 32 side than on the tapered tube 33 side. The height h1 of the first blade 41 on the tapered tube portion 33 side is, for example, 30 millimeters, and the height h2 of the first blade 41 on the wall portion 32 side is, for example, 35 millimeters. In the form shown in FIG. 2, the height of the first blade 41 from the inner peripheral surface 34 gradually increases from one axial side to the other axial side, but even if it increases stepwise. Good.

  In the present embodiment, the height h3 from the inner wall surface 38 of the second blade 42 is constant. For example, the height h3 from the inner wall surface 38 of the second blade 42 can be made the same as the height h2 of the first blade 41 on the wall 32 side. The height h4 from the inner peripheral surface 37 of the third blade 43 gradually increases toward the first blade 41 side.

  As described above, the processing container 11 in the form shown in FIG. 2 includes the cylindrical container body 20. The container body 20 includes a cylindrical barrel portion 31, a tapered cylindrical portion 33 provided on one axial side of the barrel portion 31, and a wall portion 32 provided on the other axial side of the barrel portion 31. Have. The processing container 11 has a plurality of blades 25 for stirring the object to be processed. Each blade 25 is provided continuously from the inner peripheral surface 37 of the tapered cylindrical portion 33 to the inner wall surface 38 of the wall portion 32 through the inner peripheral surface 34 of the trunk portion 31. Since the blades 25 (second blades 42) are provided also on the wall 32 side, according to the processing container 11, the stirring performance is enhanced also on the wall 32 side.

  As described above, when a plurality of objects to be processed are introduced into the container body 20 through the tapered cylindrical portion 33, the central axis C of the processing container 11 is inclined so that the wall portion 32 side is lower than the tapered cylindrical portion 33 side. . When heat-treating the workpiece to be processed inside, the processing container 11 rotates around the central axis C. As described above, when the central axis C of the processing container 11 is inclined so that the wall portion 32 side is lower than the tapered cylinder portion 33 side and the workpiece is introduced into the container body 20 through the tapered cylinder portion 33, There are cases in which a large amount of processed material is stored in a biased manner on the wall 32 side. However, according to the blade 25 having the above-described configuration, it is possible to efficiently stir the workpiece by the second blade 42 even in such a case. That is, even when the workpieces are biased toward the wall portion 32 side, the second blades 42 function and can efficiently stir these workpieces. In addition, about the to-be-processed object located in the inner peripheral side of the trunk | drum 31 and the taper cylinder part 33, the 1st blade | wing 41 and the 3rd blade | wing 43 function, and these to-be-processed objects can be stirred efficiently.

  As described above, in the form shown in FIG. 2, each blade 25 is composed of the first blade (first blade portion) 41, the second blade (second blade portion) 42, and the third blade (third blade portion) 43. It is configured. The height of the first blade 41 from the inner peripheral surface 34 is higher on the wall 32 side than on the tapered cylinder 33 side (h2> h1). For this reason, the stirring performance in the wall part 32 side can be made still higher by the blade | wing 25 (the range of the wall part 32 side of the 1st blade | wing 41, and the 2nd blade | wing 42) by the wall part 32 side.

  As a result, according to the heat treatment apparatus 10 including the processing container 11 shown in FIG. 2, it is possible to suppress the occurrence of unevenness even when many objects to be processed are heat-treated simultaneously.

[Description of blade 25 (second embodiment)]
FIG. 4 is a cross-sectional view of the processing container 11. Except for the form of the blades 25, the processing container 11 shown in FIG. 2 and the processing container 11 shown in FIG. 4 are the same.

  In the form shown in FIG. 4, the blades 25 are provided on each of the inner peripheral surface 37 of the tapered cylindrical portion 33 and the inner peripheral surface 34 of the trunk portion 31, and these blades 25 are integrated. That is, the blades 25 are continuously provided from the inner peripheral surface 37 of the tapered cylindrical portion 33 to the inner peripheral surface 34 of the trunk portion 31. FIG. 5 is a cross-sectional view taken along arrow AA in FIG. As shown in FIG. 5, a plurality (four in the illustrated example) of blades 25 having a long shape continuously in the axial direction are provided in the processing container 11 at equal intervals along the circumferential direction. These blades 25 all have the same shape.

  A specific configuration of the blade 25 will be further described. The blade 25 includes a blade 41 provided on the inner peripheral surface 34 of the body portion 31 and a blade 43 provided on the inner peripheral surface 37 of the tapered tube portion 33. These blades 41 and 43 are connected together (that is, continuing without a break). Compared with the embodiment shown in FIG. 2, in the embodiment shown in FIG. 4, the blades extending in the radial direction along the inner wall surface 38 of the wall portion 32 are not provided. However, the end 41 b on the other axial side of the blade 41 provided on the inner peripheral surface 34 of the trunk portion 31 is connected to the inner wall surface 38.

  The height of the blade 41 from the inner peripheral surface 34 is higher on the other side in the axial direction than on one side in the axial direction. That is, the height of the blade 41 from the inner peripheral surface 34 is higher on the wall 32 side than on the tapered tube 33 side. The height h1 of the blade 41 on the taper cylinder portion 33 side is, for example, 30 millimeters, and the height h2 of the blade 41 on the wall portion 32 side is, for example, 35 millimeters. In the form shown in FIG. 4, the height from the inner peripheral surface 34 of the blade 41 gradually increases from one axial side toward the other axial side, but may increase stepwise. On the tapered tube portion 33 side, the height h4 from the inner peripheral surface 37 of the blade 43 gradually increases toward the blade 41 side.

  As described above, the processing container 11 in the form shown in FIG. 4 includes the cylindrical container body 20. The container body 20 includes a cylindrical barrel portion 31, a tapered cylindrical portion 33 provided on one axial side of the barrel portion 31, and a wall portion 32 provided on the other axial side of the barrel portion 31. Have. The processing container 11 has a plurality of blades 41 on the inner peripheral surface 34 of the body portion 31 for stirring the object to be processed. The height of the blade 41 from the inner peripheral surface 34 is higher on the wall portion 32 side than on the tapered tube portion 33 side (h2> h1). Thus, since the blade | wing 41 provided in the internal peripheral surface 34 of the trunk | drum 31 becomes high at the wall part 32 side, stirring performance becomes high in the wall part 32 side.

  As described above, when a plurality of objects to be processed are introduced into the container body 20 through the tapered cylindrical portion 33, the central axis C of the processing container 11 is inclined so that the wall portion 32 side is lower than the tapered cylindrical portion 33 side. . When heat-treating the workpiece to be processed inside, the processing container 11 rotates around the central axis C. As described above, when the central axis C of the processing container 11 is inclined so that the wall portion 32 side is lower than the tapered cylinder portion 33 side and the workpiece is introduced into the container body 20 through the tapered cylinder portion 33, There are cases in which a large amount of processed material is stored in a biased manner on the wall 32 side. However, according to the blade | wing 25 which has the said structure, even if it is such a case, it becomes possible to stir a to-be-processed object efficiently. In other words, even in a state where the workpieces are stored in a biased manner toward the wall portion 32 side, the portion of the blade 41 in the trunk portion 31 that is provided on the wall portion 32 side and is higher from the inner peripheral surface 34. (Part of height h2) functions, and these objects to be processed can be efficiently stirred.

  As a result, according to the heat treatment apparatus 10 including the processing container 11 shown in FIG. 4, it is possible to suppress the occurrence of unevenness even when many objects to be processed are heat-treated at the same time.

  FIG. 6 is a cross-sectional view showing a modification of the processing container 11 shown in FIG. In the processing container 11 shown in FIG. 4, blades extending in the radial direction along the inner wall surface 38 of the wall portion 32 are not provided. On the other hand, in the processing container 11 shown in FIG. 6, the second blade 42 extending in the radial direction along the inner wall surface 38 of the wall portion 32 is provided. In the processing container 11 shown in FIG. 6, as in the processing container 11 shown in FIG. 4, blades (first blades) 41 are provided on the inner peripheral surface 34 of the trunk portion 31, and the inner peripheral surface of the blades 41. The height from 34 is higher on the wall 32 side than on the tapered cylinder 33 side (h2> h1). Furthermore, the processing container 11 has a plurality of second blades 42 for stirring the object to be processed on the inner wall surface 38 of the wall portion 32. FIG. 7 is a cross-sectional view taken along arrow AA in FIG. As shown in FIG. 7, a plurality of (four in the illustrated example) first blades 41 of the body portion 31 and a plurality of (four in the illustrated example) second blades 42 of the wall portion 32 are arranged in the circumferential direction. Different positions are provided. That is, when viewed along the axial direction, the second blades 42 are provided between the first blades 41 adjacent to each other in the circumferential direction. For this reason, when viewed along the axial direction, the first blades 41 and the second blades 42 are alternately arranged along the circumferential direction. The processing container 11 shown in FIGS. 6 and 7 can further increase the stirring performance on the wall 32 side by further including the second blade 42.

[Description of blade 25 (third embodiment)]
FIG. 8 is a cross-sectional view of the processing container 11. Except for the form of the blades 25, the processing container 11 shown in FIGS. 2 and 4 (FIG. 6) is the same as the processing container 11 shown in FIG.

  In the form shown in FIG. 8, the blade 25 is provided on each of the inner peripheral surface 37 of the tapered cylindrical portion 33, the inner peripheral surface 34 of the trunk portion 31, and the inner wall surface 38 of the wall portion 32. The first blade 41 provided on the inner peripheral surface 34 of the body portion 31 and the third blade 43 provided on the inner peripheral surface 37 of the tapered tube portion 33 are integrated. That is, the blades 25 (41, 43) that are continuous from the inner peripheral surface 37 of the tapered cylindrical portion 33 to the inner peripheral surface 34 of the trunk portion 31 are provided. The 1st blade | wing 41 and the 3rd blade | wing 43 are in one connection (that is, it continues without a break). A second blade 42 is provided on the inner wall surface 38 of the wall portion 32 as a blade 25 different from the single blade 25 (41, 43). The second blade 42 extends in the radial direction along the inner wall surface 38 of the wall portion 32.

  The height from the inner peripheral surface 34 of the first blade 41 may be higher on the other side in the axial direction than on the one side in the axial direction. However, in the embodiment shown in FIG. The height h2 on the other side in the axial direction is the same (h1 = h2). The height of the first blade 41 is constant along the axial direction.

  In the present embodiment, the height h3 from the inner wall surface 38 of the second blade 42 is constant. For example, the height h3 from the inner wall surface 38 of the second blade 42 can be made the same as the height h2 of the first blade 41 on the wall 32 side. The height h4 from the inner peripheral surface 37 of the third blade 43 gradually increases toward the first blade 41 side.

  FIG. 9 is a cross-sectional view taken along arrow AA in FIG. As shown in FIG. 9, a plurality of (four in the illustrated example) first blades 41 of the body portion 31 and a plurality of (four in the illustrated example) second blades 42 of the wall portion 32 are arranged in the circumferential direction. Different positions are provided. That is, when viewed along the axial direction, the second blades 42 are provided between the first blades 41 adjacent to each other in the circumferential direction. For this reason, when viewed along the axial direction, the first blades 41 and the second blades 42 are alternately arranged along the circumferential direction.

  As described above, the processing container 11 in the form shown in FIG. 8 includes the cylindrical container body 20. The container body 20 includes a cylindrical barrel portion 31, a tapered cylindrical portion 33 provided on one axial side of the barrel portion 31, and a wall portion 32 provided on the other axial side of the barrel portion 31. Have. The processing container 11 includes a plurality of first blades 41 provided on the inner peripheral surface 34 of the body portion 31 and a wall portion 32 at a circumferential position different from the first blades 41 in order to stir the workpiece. A plurality of second blades 42 provided on the wall surface. Since the blades 25 (second blades 42) are provided also on the wall 32 side, according to the processing container 11, the stirring performance is enhanced also on the wall 32 side.

  As described above, when a plurality of objects to be processed are introduced into the container body 20 through the tapered cylindrical portion 33, the central axis C of the processing container 11 is inclined so that the wall portion 32 side is lower than the tapered cylindrical portion 33 side. . When heat-treating the workpiece to be processed inside, the processing container 11 rotates around the central axis C. As described above, when the central axis C of the processing container 11 is inclined so that the wall portion 32 side is lower than the tapered cylinder portion 33 side and the workpiece is introduced into the container body 20 through the tapered cylinder portion 33, There are cases in which a large amount of processed material is stored in a biased manner on the wall 32 side. However, according to the blade 25 having the above-described configuration, it is possible to efficiently stir the workpiece by the second blade 42 even in such a case. That is, even when the workpieces are biased toward the wall portion 32 side, the second blades 42 function and can efficiently stir these workpieces. In addition, about the to-be-processed object located in the inner peripheral side of the trunk | drum 31 and the taper cylinder part 33, the 1st blade | wing 41 and the 3rd blade | wing 43 function, and these to-be-processed objects can be stirred efficiently.

  As a result, according to the heat treatment apparatus 10 provided with the processing container 11 shown in FIG. 8, it is possible to suppress the occurrence of unevenness even when many objects to be processed are heat-treated simultaneously.

[Configuration of introduction pipe 23 and gas introduction tip 24]
FIG. 10 is a cross-sectional view showing the configuration of the other side in the axial direction of the processing container 11. As described above, the introduction tube 23 is provided in the second cylindrical body 22. The introduction pipe 23 is a member for passing a heat treatment gas toward the container body 20. The introduction tube 23 has a gas introduction tip (nozzle) 24 for ejecting gas into the container body 20 at the tip on one side in the axial direction. A plurality of ejection holes 24a are formed in the gas introduction tip 24, and gas is ejected from the ejection holes 24a.

  As described above, the second cylindrical body 22 is joined to the container body 20 by welding (welded portion 36). The second cylinder 22 is made of the same cast steel as the container body 20. On the other hand, the introduction pipe 23 is made of stainless steel having high gas resistance. The gas introduction tip 24 is made of cast steel (made of heat-resistant cast steel same as the container 11). A spacer ring 50 as an annular member is attached to the opening hole 39 formed in the wall portion 32 of the container body 20. The spacer ring 50 is fixed to the opening hole 39 by welding. The spacer ring 50 can be made of cast steel, for example. In addition, the material of each part is not limited to the said description.

  The gas introduction tip portion 24 has an annular large-diameter annular portion 51 and a bottomed cylindrical small-diameter annular portion 52. A gas introduction tip portion 24 is attached to an end portion 26 a of a linear tube body 26 included in the introduction tube 23. In the present embodiment, a male screw is formed on the large-diameter annular portion 51, a female screw is formed on the introduction tube 23 (end portion 26a), and the gas introduction tip 24 is fixed to the introduction tube 23 by screwing them together. The The large-diameter annular portion 51 has an outer diameter larger than the inner diameter of the spacer ring 50. The small-diameter annular portion 52 has a smaller outer diameter than the large-diameter annular portion 51 and a smaller outer diameter than the inner diameter of the spacer ring 50. For this reason, the small diameter annular portion 52 is inserted through the inner peripheral side of the spacer ring 50. A plurality of ejection holes 24 a are provided in the small-diameter annular portion 52.

  Thus, in this embodiment, the processing container 11 is provided with the 2nd cylinder 22 provided in the axial direction other side of the container main body 20. As shown in FIG. An introduction pipe 23 is provided on the inner peripheral side of the second cylindrical body 22, and the other axial side of the container body 20 has a double pipe structure. In the present embodiment, the second cylindrical body 22 is made of cast steel together with the container body 20, and the introduction pipe 23 is made of stainless steel. By adopting a double tube structure, the portion (introduction tube 23) constituting the flow path through which the gas passes can be made of a gas resistant material (stainless steel).

  As described above, the gas introduction tip portion 24 has the large-diameter annular portion 51 fixed to the end portion 26 a of the tube body 26 and the small-diameter annular portion 52. The large-diameter annular portion 51 has an outer diameter larger than the inner diameter of the spacer ring 50. The small-diameter annular portion 52 has a smaller outer diameter than the large-diameter annular portion 51 and passes through the inner peripheral side of the spacer ring 50. Therefore, the introduction pipe 23 in which the gas introduction tip 24 is fixed to the end 26 a is inserted from the other side in the axial direction into the second cylindrical body 22, and the large-diameter annular portion 51 is inserted into the spacer ring 50. As a result, the small-diameter annular portion 52 is inserted through the spacer ring 50, and the ejection hole 24a of the small-diameter annular portion 52 is exposed to the container body 20 side. As a result, the assembly of the introduction pipe 23 having the gas introduction tip 24 is facilitated, and a configuration in which the gas that has passed through the introduction pipe 23 is ejected into the container body 20 from the ejection holes 24a can be easily obtained.

  As described above, in this embodiment (see FIG. 1), when the workpiece is put into the container body 20, the central axis C of the processing container 11 is inclined so that the wall 32 side is lower than the tapered cylindrical part 33 side. Let For this reason, when the object to be processed is thrown into the container main body 20, there are cases where the object to be processed is stored in a biased manner toward the wall portion 32 side. As shown in FIG. 10, the inner wall surface 38 of the wall portion 32 is not composed of only a smooth surface, the gas introduction tip portion 24 protrudes, and the shape becomes slightly complicated. If the shape of the inner wall surface 38 is complicated and there are irregularities or the like, the thrown object to be processed may remain and remain. If the object to be processed remaining is mixed with the object to be heat treated next, these objects to be processed are treated as defective and discarded. Therefore, in the present embodiment, a spacer ring 50 is provided in the opening hole 39 of the wall portion 32 in order to prevent such a residue of the workpiece. That is, the spacer ring 50 fills an annular space 49 formed between the opening hole 39 and the gas introduction tip 24. The spacer ring 50 is provided so as to close the opening hole 39 so that a concave portion is not generated on the inner wall surface 38 (as much as possible).

  As described above, in the present embodiment, the processing vessel 11 is provided with the introduction pipe 23 on the other side in the axial direction of the vessel main body 20 in order to pass gas toward the vessel main body 20. The introduction pipe 23 has a gas introduction tip portion 24, and the gas introduction tip portion 24 is provided through an opening hole 39 formed in the wall portion 32, and jets gas into the container body 20. A spacer ring 50 is provided in an annular space 49 formed between the opening hole 39 and the gas introduction tip 24, and the spacer ring 50 fills the annular space 49. According to this configuration, when the plurality of objects to be processed is finished and the objects to be processed are replaced, the spacer ring 50 prevents the objects to be processed from remaining on the side of the wall 32 such as being caught in a gap. It becomes possible to prevent. As a result, it is possible to prevent the occurrence of an object to be treated as defective.

[Configuration of Processing Container 11]
As described above, the processing container 11 of each form (for example, in FIG. 2) is configured by joining the container main body 20, the first cylindrical body 21, and the second cylindrical body 22 by welding. Here, due to aged deterioration or the like, the welded portion (weld seam portion) tends to be weak in strength, and the welded portion may cause a decrease in the life of the processing vessel 11. Therefore, in the processing container 11 of each of the above forms, the welded portion is a position that is not easily affected by heat. This configuration will be specifically described.

  As shown in FIG. 1, the heat treatment apparatus 10 includes a wall of a heat insulating material 15 that surrounds the container body 20. The walls of the heat insulating material 15 include upper and lower walls 55 and 56 (on the center axis C being horizontal), walls 18 and 19 on both sides in the axial direction, and walls on both sides in the orthogonal direction (not shown). included. In the present embodiment, among these walls, the wall on one side in the axial direction is referred to as “first wall 18”, and the wall on the other side in the axial direction is referred to as “second wall 19”. The heater 12 a of the heating device 12 is provided on a wall other than the first wall 18 and the second wall 19. In the following, the configuration of the processing container 11 will be described by taking the form shown in FIG. 2 as an example.

  In FIG. 2, as described above, the processing container 11 is provided on one side in the axial direction of the container main body 20 serving as an input and discharge side of the object to be processed, in addition to the container main body 20 positioned in the center in the axial direction. The 1st cylinder 21 and the 2nd cylinder 22 provided in the axial direction other side of the container main body 20 used as the gas introduction side for heat processing are provided. The first cylinder 21 penetrates the first wall 18 of the heat insulating material 15 together with a part (end portion 33 a) of the container main body 20. The first cylinder 21 protrudes from the first wall 18. The second cylinder 22 penetrates the second wall 19 of the heat insulating material 15 together with the other part (small cylinder part 32 b) of the container body 20. The second cylinder 22 protrudes from the second wall 19 of the heat insulating material 15.

  The container main body 20 including the trunk portion 31, the tapered cylindrical portion 33, and the wall portion 32 has a seamless structure as described above. That is, the body part 31, the tapered cylinder part 33, and the wall part 32 including the blades 25 are integrally formed by casting. Such a container main body 20 and the first cylinder 21 are welded and joined in the vicinity of the first wall 18. That is, the welded portion 35 is located in the vicinity of the first wall 18. In particular, in the embodiment shown in FIG. 2, the welded portion 35 is provided in the range of the first wall 18 in the thickness direction. On the other side in the axial direction, the container main body 20 and the second cylindrical body 22 are welded and joined in the vicinity of the second wall 19. That is, the welded portion 36 is located in the vicinity of the second wall 19. In particular, in the embodiment shown in FIG. 2, the welded portion 36 is provided in the range in the thickness direction of the second wall 19. According to such a processing container 11, it becomes the structure by which the part with small heat influence was weld-joined. Moreover, in the present embodiment, the welded portions 35 and 36 are separated from the heater 12a of the heating device 12. As a result, the welds 35 and 36 are unlikely to cause a decrease in the life of the processing vessel 11.

[About heat treatment apparatus 10]
The heat treatment apparatus 10 shown in FIG. 1 can include a processing container 11 including the blades 25 of the above-described forms. The heat treatment apparatus 10 includes a processing container 11 (in each of the above-described forms) that accommodates an object to be processed, a heating device 12 that heats the object to be processed in the processing container 11, A posture changing mechanism 13 for changing the inclination angle and a rotating mechanism 14 for rotating the processing container 11 about its central axis C are provided. According to the processing container 11 (in each of the above-described forms) provided in the heat treatment apparatus 10, the object to be processed can be efficiently stirred, so that the uniformity of the heat treatment in the plurality of objects to be processed can be improved, and the heat treatment performance Can be increased.

[Others]
The embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of rights of the present invention is not limited to the above-described embodiments, but includes all modifications within the scope equivalent to the configurations described in the scope of claims. For example, the heating device 12, the posture changing mechanism 13, and the rotating mechanism 14 may be other than the illustrated form.

DESCRIPTION OF SYMBOLS 10: Heat processing apparatus 11: Processing container 12: Heating apparatus 13: Attitude change mechanism 14: Rotation mechanism 15: Heat insulating material 18: First wall 19: Second wall 20: Container main body 21: First cylinder 22: First Double cylinder 23: Introduction pipe 24: Gas introduction tip 25: Blade 31: Body 32: Wall part 33: Tapered cylinder part 34: Inner peripheral surface 35: Welded part 36: Welded part 37: Inner peripheral surface 38: Inner Wall surface 39: Opening hole 41: First blade 42: Second blade 43: Third blade 49: Annular space 50: Spacer ring (annular member) 51: Large-diameter annular portion 52: Small-diameter annular portion C: Central axis

Claims (8)

A container body having a cylindrical body part, a tapered tube part provided on one axial side of the body part, and a wall part provided on the other axial side of the body part, When a plurality of objects to be processed are introduced into the container main body through the tapered cylindrical part, the central axis is inclined so that the wall side is lower than the tapered cylindrical part side, and when the processed object is heat-treated A processing vessel that rotates about a central axis,
Having blades for stirring the workpiece;
The said blade is a processing container provided continuously from the inner peripheral surface of the said taper cylinder part to the inner wall surface of the said wall part through the inner peripheral surface of the said trunk | drum. The blades are provided on a first blade provided on an inner peripheral surface of the body portion, a second blade provided on an inner wall surface of the wall portion, and an inner peripheral surface of the tapered tube portion. A third blade,
The processing container according to claim 1, wherein a height of the first blade from the inner peripheral surface is higher on the wall portion side than on the tapered tube portion side. A container body having a cylindrical body part, a tapered tube part provided on one axial side of the body part, and a wall part provided on the other axial side of the body part, When a plurality of objects to be processed are introduced into the container main body through the tapered cylindrical part, the central axis is inclined so that the wall side is lower than the tapered cylindrical part side, and when the processed object is heat-treated A processing vessel that rotates about a central axis,
Having a blade for stirring the object to be treated on the inner peripheral surface of the body part;
The processing vessel in which the height of the blade from the inner peripheral surface is higher on the wall portion side than on the tapered tube portion side.   The processing container of Claim 3 which has a 2nd blade | wing for stirring the said to-be-processed object in the inner wall surface of the said wall part. A container body having a cylindrical body part, a tapered tube part provided on one axial side of the body part, and a wall part provided on the other axial side of the body part, When a plurality of objects to be processed are introduced into the container main body through the tapered cylindrical part, the central axis is inclined so that the wall side is lower than the tapered cylindrical part side, and when the processed object is heat-treated A processing vessel that rotates about a central axis,
In order to stir the workpiece, a first blade provided on the inner peripheral surface of the body portion and a second blade provided on the inner wall surface of the wall portion at a circumferential position different from the first blade And having a processing container. An introduction pipe provided on the other side in the axial direction of the container body in order to pass gas toward the container body;
The introduction pipe is provided through an opening hole formed in the wall part, and has a gas introduction tip part for ejecting gas into the container body,
The annular member is provided in the said cyclic | annular space so that the cyclic | annular space formed between the said opening hole and the said gas introduction front-end | tip part may be filled. Processing container. A processing container for storing the processing object, a heating device for heating the processing object in the processing container, a posture changing mechanism for changing an inclination angle of a central axis of the processing container, and the processing container for the processing A rotation mechanism that rotates around the central axis of the container,
The said processing container is a heat processing apparatus which is a processing container as described in any one of Claims 1-6. A heat insulating wall surrounding the container body;
The processing container is provided on one side in the axial direction of the container main body which is the input and discharge side of the object to be processed, and a first cylinder protruding from the first wall of the heat insulating material, and introduction of a gas for heat treatment A second cylinder that is provided on the other side in the axial direction of the container body that is the side and projects from the second wall of the heat insulating material,
The container body has a seamless structure,
The container body and the first cylinder are welded and joined at a position near the first wall, and the container body and the second cylinder are welded and joined at a position near the second wall, The heat treatment apparatus according to claim 7.

Images