JP2012031487A - Heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating device which heats workpieces with different shapes at high precision, and can be made small in size.SOLUTION: In the heating device, a frame is provided with: a table 61 capable of transferring workpieces W1, W2; a heating unit 65 including heating coils 652, 653; and a lifter 64 arranging the workpieces W1, W2 supported to a receiving part 61h at prescribed positions with respect to the heating coils 652, 653, respectively, and the heating device heats the first workpiece W1 with a hollow part Wh elongating from the end in an uniaxial direction and a second workpiece W2 with no hollow part. The heating unit 65 includes: an upper coil base 651c and a lower coil base 651e arranged at different distances from the table 61 in a uniaxial direction. In the upper coil base 651c, the first heating coil 653 heating the inner surface of the hollow part of the first workpiece W1 is mountable to be projected to the lower side, and, in the lower coil base 651e, the second heating coil 652 heating the outer surface of the first workpiece W1 or the second workpiece W2 is mountable to the upper side.

Description

  The present invention relates to a heating apparatus that can be used for both heating of an outer surface of a workpiece and heating of an inner surface of the workpiece.

  2. Description of the Related Art Conventionally, there is known an apparatus in which a heat treatment line including a transport mechanism that transports a workpiece and a processing unit that heats and cools the workpiece is disposed on a frame. For example, Patent Literature 1 below describes a constant velocity joint quenching device in which a cup portion and a stem shaft portion are provided integrally.

In this quenching apparatus, a first quenching station for quenching the outer peripheral surface of the stem shaft portion, a second quenching station for quenching the inner surface of the cup portion, and a third quenching for quenching spline holes in the workpiece. An entrance station is provided, and a transport mechanism for transporting the workpiece is provided between the stations.
The workpieces to be processed not only have a plurality of types of cup portions, but also have stem stem portions having holes opened at the ends and those having no holes, and the shapes are greatly different depending on the workpieces. Therefore, in this quenching apparatus, in order to quench a plurality of types of constant velocity joints, a quenching station is divided into a large number and a quenching process is performed using a heating coil having a shape corresponding to the workpiece.

  In order to quench the constant velocity joint with this constant velocity joint quenching apparatus, the workpiece is loaded from the inlet and transferred to the first to third quenching stations according to the workpiece by the transfer mechanism. Each part of the workpiece is heated and cooled at the entry station, and the workpiece after the heat treatment is carried out from the outlet.

JP 2004-168133 A

However, in the quenching apparatus having such a conventional heating apparatus, in order to quench other types of workpieces with high accuracy, the processing is performed in different sections depending on the quenching site and shape. For example, the shape of the heating coil used differs greatly between the case where the inner surface of the workpiece having a hole opened at the end is quenched and the case where the outer surface of the workpiece is quenched. There were many.
However, if heat treatment is performed in different sections depending on the shape of the workpiece, the heat treatment line becomes longer and the apparatus becomes larger.

  Therefore, an object of the present invention is to provide a heating apparatus that can heat workpieces having different shapes with high accuracy and can be miniaturized.

  The present invention that achieves the above object is capable of heating a first workpiece having a hollow portion extending in a uniaxial direction from an end portion on the heating coil side while being supported by a receiving portion, and a second workpiece having no hollow portion. And a heating unit having a heating coil capable of heating the work transferred by the table, and a work supported by the receiving part. The frame is provided with lifters that can displace the workpiece in a predetermined position with respect to the heating coil by uniaxially displacing the heating coil, and the heating unit has an upper coil base and a lower side arranged at different distances from the table in the uniaxial direction. A coil base is provided, and a first heating coil for heating the inner surface of the hollow portion of the first workpiece can be protruded downward from the upper coil base, and the first coil can be attached to the lower coil base. Or it is configured to be mounted to the second heating coil for heating the outer surface of the second work upward.

  The lifter is preferably configured to be rotatable by placing the workpiece at a predetermined position with respect to the first or second heating coil.

  The lifter may include a lift head that supports one end side of the first workpiece or the second workpiece, and the heating unit may include a rotation support portion that rotatably supports the other end side of the workpiece.

  The heating device preferably includes a detection unit that detects the position of the rotation support unit, and the detection unit detects the position of the first workpiece or the second workpiece.

  The rotation support portion includes a cap that can support the periphery of the top of the first workpiece heated by the first heating coil and can be mounted on the lower coil base in a state where the first heating coil is mounted on the upper coil base. Good.

  The heating unit may include a fixed bracket fixed to the frame and having an upper coil base, and a movable bracket supported by the fixed bracket so as to be movable up and down and having a lower coil base.

  According to the heating device of the present invention, the upper coil base and the lower coil base are provided at different distances along a uniaxial direction in which the work is moved by the lifter, and the inner surface of the first work is provided on the upper coil base. The first heating coil to be heated can be mounted downward, and the second heating coil for heating the outer surface of the first workpiece or the second workpiece can be mounted on the lower coil base on the upper side. Accordingly, it is possible to provide a heating apparatus that can heat workpieces having different shapes with high accuracy and can be miniaturized.

The example of the workpiece | work in embodiment of this invention is shown, (a) is a side view which shows a part of 1st work in cross section, (b) is the bottom view, (c) is a part of 2nd work in cross section The side view to show, (d) is the bottom view. It is a schematic front view of the heat processing apparatus which concerns on embodiment of this invention. It is a schematic plan view of the heat processing apparatus which concerns on embodiment of this invention. FIG. 4 is a schematic AA sectional view of FIG. 3 in the heat treatment apparatus according to the embodiment of the present invention. It is a fragmentary sectional view which shows the structure of the 5th station periphery of the heat processing apparatus which concerns on embodiment of this invention. It is a front view which shows the state which mounted | wore the heating unit of the heat processing apparatus which concerns on embodiment of this invention with the 2nd heating coil. (A) is a front view which shows the 1st heating coil which concerns on embodiment of this invention, (b) is a schematic cross section which shows the state which attached the 1st heating coil and the centering cap to the heating unit of the heat processing apparatus which concerns on embodiment. FIG. (A) is a front view which shows the 2nd heating coil which concerns on embodiment of this invention, (b) is a schematic sectional drawing which shows the state which mounted | wore the heating unit of the heat processing apparatus which concerns on embodiment with the 2nd heating coil. It is a partial front view of the lifter for workpiece | work upper part heating of the heat processing apparatus which concerns on embodiment of this invention. It is a partial side view of the lifter for workpiece | work upper part heating of the heat processing apparatus which concerns on embodiment of this invention. (A)-(c) is a figure explaining operation | movement of the workpiece | work upper part heat processing part of the heat processing apparatus which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
In this embodiment, an example of a heat treatment apparatus in which a heating device is incorporated will be described. A workpiece to be processed by this heat treatment apparatus is, for example, a constant velocity joint intermediate for producing a constant velocity joint for a vehicle, and a hollow portion penetrating inside as shown in FIGS. 1 (a) and (b). A first work W1 in which a stem shaft part Ws having Wh and a cup part Wc are coaxially adjacent to each other, and a stem shaft part Ws having no through hole as shown in FIGS. 1C and 1D. And the second workpiece W2 provided with the cup portion Wc. In the present embodiment, the cup portion Wc may be referred to as a workpiece lower portion, and the stem shaft portion Ws may be referred to as a workpiece upper portion.

[overall structure]
As shown in FIGS. 2 and 3, the heat treatment apparatus 1 is provided with a heat treatment line 2 for sequentially induction-hardening the cup portion Wc and the stem shaft portion Ws on the base portion 4 of the frame 3. Various driving units, wiring, piping, and the like necessary for operating the heat treatment line 2 are disposed inside the base unit 4.

  In the heat treatment line 2, the phase determining unit 30 and the phase determining unit 40 are arranged between the carry-in position provided on one end side in the width direction of the heat treatment apparatus 1 and the carry-out position provided on the other end side. A processing unit, a workpiece lower heat treatment unit 50 incorporating the heating device of the present embodiment, a workpiece upper heat treatment unit 60 and an aftercool processing unit 70 are provided in order, and conveyance for conveying the workpieces W1, W2 between the processing units. A mechanism 80 is provided.

[Transport mechanism]
The transport mechanism 80 has a work stop position from the first station A to the sixth station F between the carry-in position and the carry-out position, and is located at the front side end of the middle plate 5 provided in the base portion 4 throughout. A conveyance axis L is set along the conveyance axis L, and the workpieces W1 and W2 can be intermittently conveyed to the stations A to F along the conveyance axis L. Here, the transport axis L is the movement locus of the central axis of the workpieces W1 and W2 to be transported.

  The transport mechanism 80 includes a table-type transport mechanism 10 that transports the workpieces W1 and W2 from a first station A that is a carry-in position to a fourth station D that is an intermediate transfer position, and a sixth transport position that is a carry-out position from the fourth station D. And a gantry-type transport mechanism 20 that transports the workpieces W1, W2 to the station F.

[Phase determination processing section]
The temporary phasing unit 30 of the phasing processing unit is provided at the first station A, and places the workpieces W1 and W2 on the temporary phasing table 11 with the stem shaft portion Ws facing upward to determine the temporary phasing in the circumferential direction. Do.
The phasing unit 40 is provided at the second station B, and the workpieces W1 and W2 placed on the temporary phasing table 11 are transferred to the phasing table 12 by the lifting chuck mechanism 44 to accurately detect the workpieces W1 and W2. Determine the phase in the circumferential direction.

[Work heat treatment part under the workpiece]
The workpiece lower heat treatment section 50 is intermittently half-rotatable and raised and lowered at a 180 ° symmetrical position around the workpiece lower rotating shaft 53a and the workpiece lower rotating shaft 53a which are erected on the middle plate 5 of the base portion 4. Two rotating chuck mechanisms 52 that are detachably mounted, and a workpiece lower heat treatment head 56 that is provided on the intermediate plate 5 and can heat-treat the cup portions Wc of the workpieces W1 and W2 held by the rotating chuck mechanism 52. Prepare. The heat treatment head 56 for the lower part of the work is provided with a heating coil part, a coolant injection part, and the like.

  In the workpiece lower heat treatment section 50, the stem shaft portion Ws of the workpieces W1 and W2 transferred to the third station C by the phasing table 12 is held by the rotary chuck mechanism 52, and the workpieces W1 and W2 are lifted to rotate the workpiece lower portion. It is rotated around the shaft 53a and arranged at the G position on the workpiece lower heat treatment head 56. Then, the workpieces W1 and W2 are lowered and raised while rotating to heat-treat the cup portion Wc, the rotating chuck mechanism 52 is rotated again and returned to the third station C, and placed on the transfer table 13 at the third station C. .

[Intermediate delivery position]
The fourth station D is in the intermediate delivery position, and the workpieces W1 and W2 are transferred to the fourth station D while being placed on the transfer table 13 at the third station C. In the fourth station D, the workpieces W1 and W2 are held and raised by the first gantry 21 that is slidably supported on the ceiling rail 24 and can move up and down, and is transferred to the fifth station E of the workpiece upper heat treatment section 60.

[Work heat treatment part]
As shown in FIGS. 2 to 4, the heating apparatus 100 of the present embodiment is incorporated in the workpiece upper heat treatment section 60. The heating device 100 is disposed approximately horizontally on the base portion 4 and can be intermittently rotated. The heating device 100 is mounted on the intermittent rotation table 61 at a plurality of positions in the circumferential direction so that workpieces W1 and W2 can be placed thereon. A workpiece upper receiving tool 61h, a workpiece upper heating unit 65 provided at a position corresponding to the workpiece upper heating position H of the intermittent rotary table 61, and a workpiece upper portion provided on the base 4 of the workpiece upper heating position H. Heating lifter 64.

  The workpiece upper heat treatment section 60 of this embodiment further includes a plurality of annular cooling jackets 62 provided on the intermittent rotation table 61 so as to surround the upper portions of the workpiece upper receiving members 61h, and the transfer of the intermittent rotation table 61. And a transfer lifter 63 provided on the base portion 4 of the fifth station E as a position.

(Intermittent rotary table)
As shown in FIGS. 3 and 4, the intermittent rotation table 61 is composed of a plate-like body supported by a work upper rotating shaft portion 61c provided in the base portion 4 in the vertical direction. It is configured to be driven intermittently by rotation. The intermittent rotary table 61 is provided with a workpiece upper receiving tool 61h at an equal position in the circumferential direction at an equal distance from the rotation center, specifically, every 120 °.

  As shown in FIG. 3, the intermittent rotating table rotates intermittently so that the workpiece upper support 61 h is in three positions: a fifth station E, a workpiece upper heating position H, and a workpiece upper additional cooling position I. At the same time, stop accurately. The fifth station E is a transfer position for carrying in and out of the workpiece upper heat treatment section 60, and the workpiece upper heating position H is a position for heating the stem shaft portion Ws of the workpieces W1 and W2, and further cooling the workpiece upper portion. The position I is an intermediate position provided between the workpiece upper heating position H and the fifth station E. The workpiece upper receiving tool 61h at each position can be rotated to move to the next position after a predetermined time has elapsed.

(Receiver for work upper part)
As shown in FIG. 5, the workpiece upper receiving tool 61 h is mounted on each receiving tool mounting portion 61 u of the intermittent rotation table 61, and the workpiece W 1, W 2 is fitted with the cup portion Wc. W1 and W2 can be supported. In a state where the workpieces W1 and W2 are supported by the respective receiving tool mounting portions 61u, the stem shaft portions Ws and the hollow portions Wh of the workpieces W1 and W2 are arranged in a substantially vertical direction.
The workpiece upper receiving tool 61h has a shape and a size corresponding to the workpieces W1 and W2, and is replaceable according to the workpieces W1 and W2. In the workpiece upper receiving part 61h, there are intermittent head through holes 620 through which the lift head 63a of the transfer lifter 63 and the lift head 64e of the workpiece upper heating lifter 64 shown in FIG. It is provided on each through hole 61 a of the rotary table 61.

(Annular cooling jacket)
As shown in FIG. 5, the annular cooling jacket 62 is formed in an annular shape, and an annular space 62 b through which the coolant can flow is formed. A number of nozzle holes are provided in the inner peripheral plate 62a for cooling water injection, and when the cooling liquid is supplied into the annular space 62b, the cooling liquid is injected from the plurality of nozzle holes toward the inside of the annular cooling jacket 62. It is possible.

(Transfer lifter)
As shown in FIG. 5, a transfer lifter 63 is provided on the base portion 4 corresponding to the fifth station E.
The transfer lifter 63 includes an air cylinder 63e fixed in a substantially vertical direction inside the base portion 4, a rod 63c supported by the air cylinder 63e via a connection bracket 63d and extending in a substantially vertical direction, A guide cylinder 63b that is disposed through the middle plate 5 and supports the rod 63c so as to be slidable, and a lift head 63a provided at the upper end of the rod 63c.

  The lift head 63a has a shape that can be fitted and held in the cup portion Wc of the workpieces W1 and W2, and the head of the through hole 61a of the intermittent rotation table 61 and the workpiece upper receiving tool 61h by the vertical movement of the rod 63c. It is configured to be movable up and down through the through-hole 620, and is disposed at a position below the intermittent rotary table 61 in a lowered state, and disposed at a position above the workpiece upper receiving tool 61h in a raised state.

(Heating unit for workpiece upper part)
As shown in FIGS. 2 and 3, the workpiece upper heating unit 65 is disposed at a predetermined position of the base portion 4. The workpiece upper heating unit 65 receives the workpieces W <b> 1 and W <b> 2 transferred to the workpiece upper heating position H by the intermittent rotation table 61. It is configured to be heatable.
As shown in FIGS. 4 and 6, the workpiece upper heating unit 65 can be moved up and down to a fixed bracket 651 fixed to a partition front wall 6 firmly provided on the frame 3 and a lower portion of the fixed bracket 651. And an air cylinder 651n which is fixed to the fixed bracket 651 in a substantially vertical direction and moves up and down the movable bracket 656.

  The fixed bracket 651 includes a support plate 651a to which the air cylinder 651n is fixed, an upper surface plate 651b disposed above the support plate 651a, and an upper coil base 651c disposed below the support plate 651a in the horizontal direction. Arranged and integrated. The movable bracket 656 connects the connecting plate 651p disposed above the upper coil base 651c, the lower coil base 651e disposed below the upper coil base 651c, and the connecting plate 651p and the lower coil base 651e. Two guide rods 651d. Two guide rods 651d are slidably supported by a pair of left and right guide bearings 651q provided on the upper coil base 651c, and the rod of the air cylinder 651n is connected to the connecting plate 651p, so that the movable bracket 656 is fixed. It can move up and down with respect to the bracket 651.

  As shown in FIG. 7A, the upper coil base 651c can be equipped with a work heating first heating coil 653 for heating the inner surface of the hollow part Wh provided on the stem axis Ws of the first work W1. It has become. The work upper first heating coil 653 includes a flange 653d that can be fixed to the upper coil base 651c, a coil body 653a that protrudes below the flange 653d and allows cooling water to flow inside, and one side below the flange 653d. A power-supplied terminal 653b that is extended and electrically connected to the coil body 653a.

  In order to mount the workpiece upper heating coil 653 on the workpiece upper heating unit 65, a flange 653d is fitted into a recess or the like on the upper surface of the upper coil base 651c, and the coil body 653a is penetrated and protruded downward. In the state, the work upper first heating coil 653 is placed on the upper coil base 651c. As shown in FIG. 6, the flange 653d is fixed by a clamp 651f provided on the upper coil base 651c. Further, the power-supplied terminal 653b is fixed to a power supply clamp 654 provided at the lower part of the upper coil base 651c. In the mounted state, the work upper first heating coil 653 is accurately and coaxially disposed with respect to the work W1 disposed at the work upper heating position H of the intermittent rotation table 60.

  On the other hand, as shown in FIG. 8A, the lower coil base 651e is equipped with a work upper second heating coil 652 for heating the outer surface of the stem axis Ws of the first work W1 or the second work W2. It is possible. The workpiece upper second heating coil 652 includes a flange 652d that can be fixed to the lower coil base 651e, a coil main body 652a that is provided above the flange 652d and allows cooling water to flow inside, and one above the flange 652d. And a power-supplied terminal 652b electrically connected to the coil body 652a.

  In order to mount the work upper second heating coil 652 on the lower coil base 651e, the flange 652d is fitted into a recess or the like on the upper surface of the lower coil base 651e, and the coil main body 652a is projected upward. As shown in FIG. 6, the flange 652d is fixed by a clamp 651g provided on the lower coil base 651e. Further, the power-supplied terminal 652b is fixed to a power supply clamp 654 provided at the lower part of the upper coil base 651c. In the mounted state, the workpiece upper second heating coil 652 is accurately and coaxially disposed with respect to the workpieces W1 and W2 disposed at the workpiece upper heating position H of the intermittent rotation table 60.

  As shown in FIG. 7B, the lower coil base 651e can be fitted with a centering cap 655 that is used when the work heating first heating coil 653 is mounted on the upper coil base 651c. Yes. In the centering cap 655, an inner housing 655b is rotatably disposed in the outer housing 655a, and a claw 655d that can contact the periphery of the top of the stem shaft portion Ws of the first workpiece W1 is attached to the inner housing 655b. It has been done. The center portion of the centering cap 655 is opened through vertically so that the coil body 653a of the first heating coil 653 for the workpiece upper part can pass vertically.

  As shown in FIG. 6, the fixed bracket 651 is provided with a centering position detection device 651z used when heating the stem shaft portion Ws of the first workpiece W1. The centering position detection device 651z is rotatable to an upper surface plate 651b of the fixed bracket 651, an air cylinder 651h fixed upward in a substantially vertical direction, a lifting rod 651i connected to the air cylinder 651h, and a lower end of the lifting rod 651i. And a centering center 651j ′ having a conical lower end.

  In the workpiece upper heating unit 65, the centering cap 655 shown in FIG. 7B or the centering center 651j ′ of the centering position detecting device 651z shown in FIG. 6 is used as the stem of the first or second workpiece W1, W2. The rotation support part which supports the front end side of the axis | shaft Ws rotatably is comprised. As shown in FIG. 4, the rotation support portion is configured to be movable up and down by an air cylinder 651n that connects the fixed bracket 651 and the movable bracket 656 or an air cylinder 651h of the centering position detection device 651z. The 651n and the air cylinder 651h each have a built-in detection unit capable of detecting the protruding amount of the rod.

  In this rotation support portion, the air cylinders 651n and 651h shown in FIG. 4 are operated, and the claws 655d of the centering cap 655 and the centering center 651j ′ of the centering position detecting device 651z in FIGS. , The periphery of the top portion of the stem shaft portion Ws can be uniformly pressed by the claw 655d, or the concave portion at the center of the top portion of the stem shaft portion Ws of the workpiece W2 can be pressed by the centering center 651j ′. As a result, it is possible to accurately check the positions of the workpieces W1 and W2, check the centering, and check the displacement. Further, since the position of the claw 655d of the centering cap 655 and the centering center 651j ′ of the centering position detecting device 651z can be detected by the air cylinder 651n or the air cylinder 651h, the first work W1 or the first work W1 or the The presence / absence of two workpieces W2 can always be detected. Further, if the position detection signal is used for controlling the workpiece upper heating lifter 64 described later, the lift head 64e can be accurately placed at a desired lift position.

(Lifter for heating workpiece upper part)
The workpiece upper heating lifter 64 is provided on the base portion 4 corresponding to the workpiece upper heating position H, as shown in FIGS. 9 and 10.
The work upper heating lifter 64 is screwed into the ball screw 64f, which is disposed in the base portion 4 in a substantially vertical direction and is rotatable, a servo motor 64h for rotating the ball screw 64f, and the ball screw 64f. A connection support bracket 64i arranged in a predetermined direction and movable up and down by rotation of the ball screw 64f, and supported by the connection support bracket 64i on the lower end side and slidably supported on the linear guide cylinder 64a of the middle plate 5 on the upper end side. A double rod 64p and a lift head 64e attached to the upper end of the double rod 64p are provided.

The double rod 64p is fixed to the connection support bracket 64i and supported by the linear guide cylinder 64a. The double rod 64p is rotatably disposed inside the cylindrical rod 64b, and the lift head 64e is fixed to the upper end. And a rotating cylinder shaft 64c. The connection support bracket 64i is provided with a motor 64d. The motor 64d is connected to the lower end side of the rotary cylinder shaft 64c, and the rotary cylinder shaft 64c is rotationally driven by the motor 64d. A lift head 64e is fixed to the upper end of the rotating cylinder shaft 64c and rotates together with the rotating cylinder shaft 64c.
A rotary joint 64j for supplying coolant from the outside is connected to the lower end of the rotary cylinder shaft 64c, and the coolant supplied from the rotary joint 64j is ejected from the lift head 64e through the inside of the rotary cylinder shaft 64c. Spray from mouth.

The lift head 64e has a shape that can be fitted and held on the lower end side of the cup portion Wc of the workpieces W1 and W2, and is provided on the workpiece upper receiving tool 61h of the intermittent rotation table 61 shown in FIG. The head is configured to move up and down through the head through hole 620.
When the lift head 63a is lowered, the lift head 63a is disposed at a position below the intermittent rotary table 61. When the lift head 63a is raised, the lift head 63a is disposed at a position above the workpiece upper receiving tool 61h. At the position where the lift head 64e is raised, the stem shaft portion Ws of the workpieces W1 and W2 supported by the lift head 64e is at a predetermined position with respect to the first or second heating coil 652 or 653 for the workpiece upper portion. Is set.

  As shown in FIGS. 9 and 10, in this work upper heating lifter 64, when the work upper heating lifter 64 is operated and the ball screw 64f is rotationally driven by the servo motor 64h, it is supported by the connection support bracket 64i. The double rod 64p rises. Then, the lift head 64e passes through the through hole 61a of the intermittent rotation table 61 and the head through hole 620 of the workpiece upper receiving tool 61h, and ascends, whereby the lift head 64e is supported by the workpiece upper receiving tool 61h. The workpiece W can be fitted into the cup portion Wc of the workpiece W, and the workpiece W can be raised in the uniaxial direction.

  As shown in FIGS. 8A and 8B, when the work heating second heating coil 652 is attached to the lower coil base 651e and the stem shaft portion Ws of the second work W2 is heated, the centering position detection is performed. The centering center 651j ′ of the device 651z is pressed against the centering hole X at the top of the stem shaft portion Ws of the second workpiece W2 fitted to the lift head 64e. Therefore, while the lift head 64e is raised, the centering center 651j 'is raised together with the second workpiece W2 by opening the air cylinder 651h of the centering position detecting device 651z shown in FIG. As a result, the stem shaft portion Ws of the second workpiece W2 can be accurately placed or relatively moved with respect to the workpiece upper second heating coil 652.

  On the other hand, as shown in FIGS. 7A and 7B, the first heating coil 653 for work upper part is attached to the upper coil base 651c, and the centering cap 655 is fixed to the lower coil base 651e in the lowered state. When the stem shaft portion Ws of the first workpiece W1 is heated, the claw 655d of the centering cap 655 is pressed around the top portion of the stem shaft portion Ws. Therefore, while the lift head 64e is lifted, the cap 655 is lifted together with the first workpiece W1 by opening the air cylinder 651n of the workpiece upper heating unit 65 shown in FIG. As a result, the stem shaft portion Ws of the first workpiece W1 can be accurately placed or relatively moved with respect to the workpiece upper first heating coil 652.

  Further, at the time of the heat treatment, as shown in FIG. 7 or FIG. 8, the lift head 64e of the work upper heating lifter 64 is rotated to align the work W with the centering center 651j ′ of the centering position detecting device 651z or the claw of the cap 655. Heat treatment can be performed while rotating together with 655d. At the time of this heating, a cooling liquid can be sprayed from the lift head 64e, and heat processing can be performed while cooling the lift head 64e and the cup part Wc of the workpiece | work W.

[Operation of workpiece heat treatment section]
The operation of the workpiece upper heat treatment section 60 will be described with reference to FIGS. 2, 3, and 11 (a) to 11 (c).
First, the workpieces W1, W2 are transferred from the fourth station D shown in FIGS. 2 and 3 to the upper portion of the fifth station E along the transport axis L while holding the stem shaft portion Ws by the first gantry 21. Lowered by the first gantry 21.
In the transfer lifter 63, as shown in FIG. 11 (a), the rod 63c is raised and the lift head 63a is raised, and the lift head 63a is fitted into the cup portion Wc of the workpieces W1 and W2 and lowered. The workpieces W1 and W2 are supported by the workpiece upper receiving tool 61h of the intermittent rotation table 61.

Next, the intermittent rotation table 61 rotates by 1/3 and intermittently rotates, and the workpieces W1 and W2 supported by the workpiece upper receiving tool 61h are transferred to the workpiece upper heating position H.
In the workpiece upper heating unit 65, as shown in FIG. 11 (b), the double rod 64p of the workpiece upper heating lifter 64 is raised, the lift head 64e is fitted into the cup Wc of the workpiece W, and the workpiece W1. , W2 is accurately positioned or relatively moved with respect to the workpiece upper heating coils 652 and 653.

  In this state, the heat treatment of the stem shaft portion Ws of the workpieces W1, W2 is performed by supplying power to the workpiece upper first or second heating coil 652, 653. During the heat treatment, the heat treatment is performed while rotating the lift head 64e and rotating the workpieces W1 and W2.

  During the movement of the workpieces W1 and W2 and the heat treatment, as shown in FIG. 7 or 8, the claw 655d of the centering cap 655 or the centering center 651j ′ of the lifting rod 651i is in contact with the workpieces W1 and W2. By being maintained, the positions of the workpieces W1, W2 are always detected by sensors provided in the air cylinders 651n, 651h, etc., and thereby heat treatment is performed with high accuracy.

After the heating of the stem shaft portion Ws, the lift head 64e is lowered and the workpieces W1 and W2 are placed again on the workpiece upper receiving tool 61h of the intermittent rotation table 61.
Then, as shown in FIG. 11C, when the workpieces W1 and W2 are placed on the workpiece upper receiving tool 61h, cooling is performed by spraying a coolant from the annular cooling jacket 62 onto the stem shaft portion Ws. .

Thereafter, the intermittent rotation table 61 shown in FIGS. 2 to 4 is rotated by 1/3 and intermittently rotated, and the workpiece W and the annular cooling jacket 62 reach the workpiece upper additional cooling position I and stop, and are preset. When the predetermined time has elapsed, the spraying of the coolant from the annular cooling jacket 62 is stopped, and the cooling of the workpiece W is finished.
Thereafter, the intermittent rotation table 61 rotates intermittently, so that the workpiece W returns to the fifth station E again.

At the fifth station E, as shown in FIG. 11A, the rod 63c of the transfer lifter 63 is raised again, and the heat treated workpieces W1, W2 are fitted to the lift head 63a to be raised to the raised position.
Then, the stem shaft portion Ws of the workpieces W1 and W2 is supported by the lowered second gantry 22 and is lifted and transferred to the aftercool processing unit 70 along the transport axis L.

[Aftercool processing section]
As shown in FIGS. 2 and 3, the aftercool processing unit 70 includes a reversing table 71 that is intermittently driven by half rotation, and the position where the rotation of the reversing table 71 stops is the sixth station F and the aftercooling position. J. In the aftercool processing unit 70, the works W1 and W2 transferred from the fifth station E by the second gantry 22 are placed on the reversing table 71 at the sixth station, and transferred to the aftercooling position J by the reversing table 71. Thereafter, a coolant or gas is sprayed onto the workpieces W1 and W2 at the aftercool position J, thereby releasing the heat remaining on the workpieces W1 and W2 and returning to the sixth station F again.
The workpieces W1 and W2 that have been heat-treated can be taken out from the sixth station F.

[Effect of heating device]
According to the heating apparatus 100 incorporated in the heat treatment apparatus 1 described above, the upper coil base 651c and the lower coil base 651e are provided along the uniaxial direction in which the workpieces W1, W2 operate by the workpiece upper heating lifter 64. . Further, a work upper first heating coil 653 for heating the inner surface of the first work W1 can be attached to the upper coil base 651c, and the work upper part for heating the outer surface of the first work W1 or the second work W2. The second heating coil 652 can be attached to the lower coil base 651e. Thereby, the 1st work W1 or the 2nd work W2 and the 1st or 2nd heating coil 652 653 for work upper parts can be arranged in a predetermined relative position with sufficient accuracy, and the 1st work W1 or the 2nd work W2 can be accurately located. Can be heated. Moreover, the heating of the first workpiece W1 and the heating of the second workpiece W2 can be performed at the same position with respect to the intermittent rotation table 61 that transports the workpieces W1, W2. Therefore, it is not necessary to provide the work upper heating unit 65 for mounting each coil on the frame 3, and the heating apparatus 100 capable of accurately heating the first work W1 or the second work W2 can be reduced in the planar direction. be able to.

  Moreover, a work upper first heating coil 653 for heating the inner surface of the first work W1 can be mounted downward from the upper coil base 651c, and the work upper part heating the outer surface of the first work W1 or the second work W2. The first heating coil 653 can be mounted upward from the lower coil base 651e. As a result, the position at which the workpiece upper second heating coil 652 is arranged and the position at which the second workpiece W2 is arranged can be made equal in height, so the distance from the intermittent rotation table 61 of the workpiece upper heating unit 65 can be reduced. It can be kept low. Moreover, since the positions at which the workpieces W1, W2 are displaced by the workpiece upper heating lifter 64 can be made equal, the size of the workpiece upper heating lifter 64 can be kept small. Accordingly, the heating device 100 can be downsized in the height direction.

In the heating apparatus 100, the workpiece upper heating lifter 64 is configured to be rotatable, and the workpiece upper heating first or second heating coil 652 is supported by the workpiece W1, W2 supported by the workpiece upper heating lifter 64. , 653 are arranged at predetermined positions and rotate.
Therefore, without rotating the work upper first heating coil 653 attached to the upper coil base 651c or the work upper second heating coil 652 attached to the lower coil base 651e, each work upper first or The workpieces W1, W2 can be rotated and heated with respect to the second heating coils 652, 653. In addition, the upper or lower coil base 651e or the first or second heating coil 652 or 653 for the workpiece upper portion need not be configured to be rotatable, and the stem shaft portion Ws of the workpieces W1 and W2 can be heated uniformly.

In the heating apparatus 100, the workpiece upper heating lifter 64 has a lift head 64e that supports one end side of the first workpiece W1 or the second workpiece W2, and the workpiece upper heating unit 65 serves as the first workpiece W1 or the second workpiece. A centering cap 655 and a centering center 651j ′ that rotatably support the other end of W2 are provided.
Accordingly, the first work W1 or the second work W2 can be held and rotated by the claw 655d or the centering center 651j ′ of the centering cap 655 and the lift head 64e during heating, and the first work W1 during rotation is rotated. Alternatively, it is possible to prevent non-uniform heating due to misalignment of the second workpiece W2.

In addition, a detection unit capable of detecting the positions of the centering cap 655 and the centering center 651j ′ is provided, and the position of the first workpiece W1 or the second workpiece W2 can be detected.
Therefore, the position of the first work W1 or the second work W2 can be detected by supporting the first work W1 or the second work W2 by the centering cap 655 or the centering center 651j ′, and the first work W1 or the second work W2 can be detected during heating. The second workpiece W2 can be arranged at an appropriate position and heated with high accuracy.

  When heating the first workpiece W1, a centering cap 655 that supports the periphery of the top of the first workpiece W1 can be attached to the lower coil base 651e. Therefore, the upper end of the first workpiece W1 can be supported using the lower coil base 651e, and the structure for supporting the first workpiece W1 can be simplified.

In this apparatus, a workpiece upper heating unit 65 is fixed to the frame 3 and has a fixed bracket 651 having an upper coil base 651c, and a movable bracket 656 having a lower coil base 651e supported by the fixed bracket 651 so as to be movable up and down. It has.
Accordingly, the relative position between the first workpiece upper first heating coil 653 mounted on the upper coil base 651c and the centering cap 655 mounted on the lower coil base 651e can be changed. Therefore, the first workpiece upper first heating coil 653 is inserted into the first workpiece W1 from the end side while the first workpiece W1 is stably supported by the workpiece upper heating lifter 64 and the centering cap 655. Thus, it is possible to prevent the first heating coil 653 for upper part of the first workpiece from coming into contact with the workpiece W1 and being damaged or damaged.

The above-described embodiment can be appropriately changed within the scope of the present invention.
For example, in the above description, the heating apparatus 100 is incorporated as a part of the heat treatment apparatus 1, but only the heating apparatus 100 can be configured independently, and only a specific processing of a workpiece such as the workpiece upper heat treatment section 60 can be performed. Only the site | part which performs this may be provided independently, and the heating apparatus 100 may be provided as a part thereof.
In this case, the example in which the workpieces W1 and W2 are displaced is described as the workpiece upper heating lifter 64 that relatively displaces the workpieces W1 and W2 and the workpiece upper heating coils 652 and 653 in one axis direction. The heating coils 652 and 653 may be displaced.

DESCRIPTION OF SYMBOLS 1 Heat processing apparatus 2 Heat processing line 3 Frame 4 Base part 5 Middle plate 6 Middle partition front wall 10 Table type conveyance mechanism 20 Gantry type conveyance mechanism 21,22 The 1st and 2nd gantry 30 Temporary phase determination part 40 This phase determination part 50 Workpiece Lower heat treatment part 60 Work upper part heat treatment part 61 Intermittent rotary table 61h Work upper part receiving tool 61s Drive part 620 Head through hole 62 Annular cooling jacket 63 Transfer lifter 63a Lift head 64 Work upper part heating lifter 64e Lift head 65 For work upper part Heating unit 651 Fixed bracket 651c Upper coil base 651e Lower coil base 651z Centering position detection device 652 Second heating coil 653 for work upper part First heating coil 655 for work upper part Centering cap 70 Aftercool processing unit 80 Conveyor 100 heating device A first station B second station C third station D fourth station E fifth station F sixth station G work lower heating position H work upper heating position I work upper additional cooling position L transport axis W1 first work W2 Second workpiece Wc Cup part Ws Stem shaft part X Centering hole

Claims (6)

A table that can be transferred while supporting a workpiece on a receiving portion, a heating unit that includes a heating coil that can heat the workpiece transferred by the table, and the workpiece that is supported by the receiving portion in a uniaxial direction. Each of the frames is provided with a lifter capable of disposing the workpiece at a predetermined position with respect to the heating coil.
A heating device capable of heating a first workpiece having a hollow portion extending in the uniaxial direction from an end portion and a second workpiece not having the hollow portion;
The heating unit includes an upper coil base and a lower coil base arranged at different distances from the table in the uniaxial direction, and the upper coil base heats the inner surface of the hollow portion of the first workpiece. A heating device that can be mounted by protruding downward, and a second heating coil that heats the outer surface of the first workpiece or the second workpiece can be mounted on the lower coil base.   The heating apparatus according to claim 1, wherein the lifter is configured to be rotatable by disposing the workpiece at a predetermined position with respect to the first or second heating coil.   The lifter includes a lift head that supports one end side of the first workpiece or the second workpiece, and the heating unit includes a rotation support unit that rotatably supports the other end side of the workpiece. The heating device according to 1.   The heating apparatus according to claim 3, further comprising a detection unit that detects a position of the rotation support unit, wherein the detection unit detects the position of the first workpiece or the second workpiece.   The rotation support portion can support the periphery of the top of the first workpiece heated by the first heating coil with the first heating coil mounted on the upper coil base, and can be mounted on the lower coil base. The heating device according to claim 3 or 4, comprising a cap.   The said heating unit was equipped with the fixed bracket which is fixed to the said frame and has the said upper side coil base, and the movable bracket which is supported by the fixed bracket so that a vertical movement is possible and which has the said lower side coil base. Heating device.

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