JP2017218655A - Heat treatment equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat treatment equipment that is capable of continuously hardening a plurality of workpieces, capable of being installed in relatively narrow space and is relatively less-expensive.SOLUTION: A heat treatment equipment 1a includes: carrying in/out conveyors C1 and C2 of a workpiece W; a heat insulation chamber 4 that receives the workpiece W conveyed on the conveyor C1 and runs on a first running path R1; a plurality of heating chambers 14 that are arranged on one end part side of the first running path R1 and receives the workpiece W from the insulation chamber 4 into the inside; a hardening chamber 20 that is provided on the other end part side of the first running path R1 and hardens the workpiece W heated in the heating chamber 14; and a carrying-out carriage 26 that receives the hardened workpiece W and runs on the second running path R2, in which an airtight type door 10 used for insertion/discharge of the workpiece W in the hardening chamber 20 opens and closes a single gateway that opens on the first/second running paths R1 and R2, and the carrying-out carriage 26 has a plurality of laterally movable tables 29 that receives and delivers the hardened workpiece W on the carrying-out conveyor C2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat treatment facility that can perform heat treatment such as quenching continuously on a plurality of workpieces, can be installed in a relatively narrow space, and is relatively inexpensive.

  For example, in order to perform a carbonitriding and quenching process on a product to be processed, a plurality of carburizing chambers and a single quenching chamber are installed in parallel with each other along a straight rail, run on the rail, and have a heat retaining chamber. A transfer unit having a delivery chamber is provided, and a workpiece to be sequentially subjected to the first carburization and the second carburization in the plurality of carburizing chambers is inserted into the heat retaining chamber through the delivery chamber. The nitriding process is performed, and the transfer unit including the heat retaining chamber is run on the rail, and is inserted into the quenching chamber through the delivery chamber and subjected to oil quenching, and then the rail in the quenching chamber. Heat treatment equipment that allows carbonitriding and quenching to be processed from the airtight door on the opposite side to the extraction (unloading) table It has been proposed (e.g., see Patent Document 1).

However, in the heat treatment equipment as described above, the extraction table for carrying out the quenched workpiece to the next line is arranged so as to extend at right angles to the opposite side of the rail across the quenching chamber. , The space required for the entire heat treatment equipment becomes vast.
In addition, because the oil tank in the quenching chamber where the oil quenching is performed is surrounded by an pit surrounding the oil tank, the installation position of the accompanying control panel, vacuum pump, etc. is further away. There is also a problem that it requires a space for the entire facility and causes a high cost.

Japanese Patent Laying-Open No. 2015-17790 (pages 1 to 21, FIGS. 1 to 8)

  The present invention solves the problems described in the background art, and can perform heat treatment such as quenching continuously on a plurality of workpieces, and can be installed in a relatively small space, and can ensure a relatively inexpensive heat treatment facility. The issue is to provide.

Means for Solving the Problems and Effects of the Invention

In order to solve the above-mentioned problems, the present invention arranges a plurality of heating chambers and quenching chambers along the first travel path, and provides doors for carrying in and out of the quenching chamber only on the first travel path side. The second traveling path for carrying out the hardened workpiece is arranged between the first traveling path and the quenching chamber.
That is, the heat treatment facility according to the present invention (Claim 1) is a heat treatment facility for continuously quenching a plurality of workpieces, and is a workpiece carry-in conveyor and a carry-out conveyor that are parallel to each other, and the carry-on conveyor. The warming chamber that receives the workpiece transferred to the inside through the delivery chamber and travels along the first traveling path along the direction intersecting the longitudinal direction of the carry-in conveyor and the carry-out conveyor, and the first traveling path A plurality of heating chambers that are disposed on at least one end side of the heat transfer chamber and that receive the work from the heat retaining chamber through the delivery chamber, and are disposed on at least the other end side of the first traveling path, And the work heated in any one of the heating chambers from the heat retaining chamber received inside again through the delivery chamber, A quenching chamber in which the workpiece is received and quenched, and the workpiece that has been quenched in the quenching chamber is received and located between the carry-in conveyor and the carry-out conveyor and the first travel path An airtight door used for insertion and discharge of the workpiece in the quenching chamber has a single entrance opening that opens to the first travel path and the second travel path side. The unloading carriage is equipped with a plurality of tables that are slidable sideways to transfer the hardened workpiece onto the unloading conveyor.

According to the heat treatment equipment as described above, the following effects (1) to (3) are obtained.
(1) The second traveling path on which the unloading carriage that transfers the workpiece quenched in the quenching chamber onto the unloading conveyor is between the loading conveyor and unloading conveyor and the first traveling path. Since it is located, the space of the whole heat treatment equipment can be made relatively compact.
(2) Compared with the entire heat treatment equipment, the work after quenching can be carried out by simply attaching the carrying cart and the second traveling path, and the conventional long and dedicated conveyor for carrying out (extraction) becomes unnecessary. It can be installed at a reasonable cost.
(3) Since the airtight door used for inserting and discharging the workpiece in the quenching chamber is provided only on the first traveling path side and the second traveling path side, maintenance associated with replacement of the packing used for the door, The cost can be reduced.

In addition, the said workpiece | work (to-be-processed object) is a steel product which consists of various steel types and requires the heat processing including quenching. Relatively large workpieces are individually held on a heat-resistant pallet (rack), but relatively small workpieces are quenched while being held in a plurality of heat-resistant racks. Heat treatment is applied.
The carry-in / carry-out conveyor is composed of, for example, a roller conveyor or a heat-resistant mesh (belt) conveyor.
Furthermore, the delivery chamber is provided with a plurality of tables that are slidable sideways and are cylindrical portions connected to the heating chamber side of the heat retaining chamber.
Moreover, the said heat retention chamber incorporates the heat retention chamber enclosed by the heat insulating material, and is equipped with the heater which heats the inside of this heat retention chamber, thereby heat-retaining the said workpiece | work.
Further, it is desirable that the carry-in / carry-out conveyor and the first and second travel paths are configured so that their longitudinal directions are orthogonal to each other in order to save the space of the entire heat treatment facility.

The heating chamber heats the workpiece to a temperature range where the workpiece can be quenched.
Further, the first traveling path and the second traveling path are also set (laid) in parallel with each other in order to save the space of the entire heat treatment facility.
In addition, the first traveling path and the second traveling path are guide grooves having a concave section provided along the floor in addition to the rails (a pair of rails), and a self-propelled heat insulation chamber is provided in the guide grooves. Or, a form in which a guide pin or a guide roller suspended from a self-propelled transport carriage is inserted, or a form in which a guide having a convex cross section is laid on the floor and both sides of the guide are sandwiched between a pair of guide rollers Also good. Alternatively, an iron plate guide band embedded in the same plane along the floor may be used, and the heat retaining chamber and the transport carriage may be automatically driven while being magnetically guided along the guide band.

In addition, the present invention includes a heat treatment facility (Claim 2) in which the quenching chamber performs oil quenching or water quenching on the workpiece and is surrounded by pits in plan view. It is.
According to this, even if the quenching chamber is surrounded by pits, the entire installation can be made compact by the effect (1), so that the installation positions of the accompanying control panel and vacuum pump can be made relatively close to each other. Yes (effect (4)).
The pit surrounding the periphery of the quenching chamber may be formed inside the upright jetty so as to surround the periphery of the quenching chamber in addition to the form formed at a position lower than the floor.

Furthermore, the present invention includes a heat treatment facility (Claim 3) in which the plurality of heating chambers can perform a carburizing process on the workpiece.
According to this, while heating the said workpiece | work to the temperature range which can be hardened, a hardening process can be performed in accordance with the surface layer part of this workpiece | work (effect (5)).
Note that by introducing a carburizing gas into the heating chamber, the workpiece can be carburized.
Further, it is possible to introduce only a carburizing process or a carbonitriding process to the workpiece by introducing nitrogen gas into the heat retaining chamber or the heating chamber.

Further, according to the present invention, the unloading carriage has a heat treatment facility in which a plurality of telescopic tables that are slidable along a horizontal direction orthogonal to the second traveling path are mounted on the upper part (claim). 4) is also included.
According to this, the unloading carriage traveling along the second traveling path is quenched on the unloading conveyor by sliding a plurality of tables mounted on the unloading carriage along the horizontal direction. Since the workpiece can be transferred smoothly, the effects (1) and (2) can be reliably achieved.

In addition, in the present invention, the plurality of heating chambers are disposed on one end side in the first traveling path, and the quenching chamber is disposed on the other end side in the first traveling path. A heat treatment facility (Claim 5) is also included.
According to this, a plurality of heating chambers are disposed on one end side in the first traveling path, and at least one quenching chamber is disposed on the other end side in the first traveling path with the carry-in / out conveyor interposed therebetween. As a result, the entire heat treatment facility can be accommodated in a precise and compact manner, and the effect (1) can be achieved more reliably.

In addition, in addition, in the present invention, a plurality of the heating chambers are arranged at both ends of the first travel path, and the quenching chamber includes the carry-in conveyor and the carry-out conveyor, and the first travel. A heat treatment facility may be included in which two heat-insulating chambers are individually disposed on the first traveling path and are disposed between a plurality of heating chambers disposed on one end side of the path.
In this case, in addition to the effects (1) to (5) described above, when there are a relatively large number of workpieces to be quenched, or different types of quenching and multiple pattern heat treatment including the quenching are efficiently performed for each workpiece. It can be applied well.

In addition, the present invention may include a heat treatment facility in which a tempering furnace for tempering the workpiece is disposed on the downstream side of the carry-out conveyor.
In this case, in addition to the effects (1) to (5), it is possible to sequentially temper the plurality of hardened workpieces.

Further, in addition, in the present invention, the first travel path and the second travel path are each composed of two sets of rails that are dedicated and parallel to each other, and the heat insulation chamber and the transport carriage are the dedicated transport paths. A heat treatment facility comprising wheels for traveling on the rails may also be included.
In this case, in addition to the effects (3) to (5), for example, the first traveling path on which the heat retaining chamber including the delivery chamber that is relatively heavy and large travels is provided with a pair of relatively wide gauges (one set). ), And the second travel path on which the small discharge carriage travels with a relatively light weight is configured with a pair of relatively narrow rails (one set), thereby achieving the effect (1). , (2) can be reliably achieved.

The top view which shows the heat treatment equipment of one form by this invention. (A) is a vertical sectional view along the arrow AA in FIG. 1, (B) is a vertical sectional view along the arrow BB in FIG. The top view which shows the effect | action of the said heat processing equipment. The top view which shows the effect | action of the said heat processing installation following FIG. The top view which shows the heat processing equipment which is an application form of the said heat processing equipment. Furthermore, the top view which shows the heat processing equipment of a different application form.

Hereinafter, modes for carrying out the present invention will be described.
FIG. 1 is a plan view showing a heat treatment facility 1a according to one embodiment of the present invention.
As shown in FIG. 1, the heat treatment facility 1 a is parallel to each other and along a direction orthogonal to the longitudinal direction of the conveyors C <b> 1 and C <b> 2 and a carry-in conveyor C <b> 1 and a carry-out conveyor C <b> 2 for sequentially feeding a plurality of workpieces W. A first traveling path R1 composed of a pair of wide-gauges (one set) of rails r laid, one heat retaining chamber 4 traveling along the first traveling path R1, and the conveyors C1 and C2 are sandwiched therebetween. The two (a plurality of) heating chambers 14 disposed on one end side (the upper end side in the drawing) of the first traveling path R1 and the other end side (the lower end in the drawing) of the first traveling path R1. And a pair of narrow rails (one set) laid between the quenching chamber 20 and the conveyors C1 and C2 and the first travel path R1. Second traveling path R2 and on the second traveling path R2 It includes a single unloading carriage 26 running along the.
The first travel path R1 and the second travel path R2 are laid parallel to each other.

As shown in FIG. 1, on the left side of the carry-in conveyor C1 and the carry-out conveyor C2, an introduction conveyor c1 and a discharge conveyor c2 arranged along a direction perpendicular to the longitudinal direction are linearly arranged. ing. A cleaning chamber 2 is installed between the introduction conveyor c1 and the delivery conveyor c2 and the carry-in conveyor C1 and the carry-out conveyor C2.
In the cleaning chamber 2, dust and the like adhering to the surface of the work W that is sequentially fed on the introduction conveyor c <b> 1 is removed and sent to the carry-in conveyor C <b> 1 as indicated by an arrow in FIG. Dirt such as fats and oils adhering to the surface of the workpiece W fed forward on the conveyor C2 is removed and sent to the lead-out conveyor c2.
Further, a tempering furnace 3 is installed between the cleaning chamber 2 and the lead-out conveyor c2, and the necessary tempering process is sequentially performed on the quenched workpiece W.

As shown in FIG. 2 (A), the heat insulation chamber 4 includes a cylindrical main body 5 whose one end is closed by a disc-shaped end plate (end plate) 6 and a left side of the main body 5 in the drawing. And a delivery chamber 12 connected coaxially to each other. The main body 5 is installed on a carriage 7 and rolls together a pair of front and rear wheels 8 provided on the lower side of the carriage 7 onto each rail r of the first travel path R1, thereby bringing the body 5 together with the delivery chamber 12. Travel along the first travel path R1.
A rectangular parallelepiped heat insulating chamber 9 is provided inside the main body 5, and a plurality of heaters h are disposed along the side wall, ceiling, and floor surface in the heat insulating chamber 9. In addition, the door d of the heat insulation chamber 9 is connected to an airtight door 10 that opens and closes between the main body 5 and the delivery chamber 12 so as to be shut off. The airtight door 10 can be opened and closed between the main body 5 and the delivery chamber 12 by, for example, a piston rod (not shown) of the air cylinder 11. The heat insulation chamber 9 is connected to a pipe (not shown) for making the inside of the heat insulation chamber 9 a vacuum, a reduced pressure atmosphere, or a nitrogen gas atmosphere.
On the other hand, on the floor surface in the delivery chamber 12, three (a plurality of) telescopic tables 13 slidable in the left-right direction in the figure are arranged in a laminated manner to insulate the workpiece W. It can be taken into and out of the chamber 9 and delivered to and from the heating chamber 14.

Further, as shown in FIG. 1, the heating chamber 14 is disposed on the upper end (one side) of the first travel path R1 across the carry-in conveyor C1 and the carry-out conveyor C2. As shown on the left side of FIG. 2A, the heating chamber 14 includes a cylindrical main body 15 having one end side closed by the same end plate 16, and a rectangular parallelepiped heat insulating chamber provided in the main body 15. 17, a plurality of heaters h arranged in the heat insulation chamber 17 in the same manner as described above, a fan 18 for stirring the atmosphere in the heat insulation chamber 17, and a motor 19 for driving the fan 18. The opening on the other end side of the main body 15 can be opened and closed by the same airtight door 10, and the door d of the heat insulating chamber 17 is connected to the airtight door 10.
Note that a pipe (not shown) for introducing and discharging a carburizing gas or a carbonitriding gas for performing a carburizing process or a carbonitriding process may be connected to the heat insulating chamber 17.
The main body 15 is supported on the floor F via a plurality of support pillars S.

Further, as shown in FIG. 1, the quenching chamber 20 is disposed on the lower (other) end portion side of the carry-in conveyor C1 and the carry-out conveyor C2 in the first travel path R1. As shown on the left side of FIG. 2 (B), the quenching chamber 20 includes four side walls 21 standing from the bottom surface of the pit P formed by digging down the floor F, and a ceiling plate 22 installed between these upper ends. The same airtight door 10 as described above for opening and closing the opening facing the side wall 21 on the second traveling path R2 side. The pit P side in the quenching chamber 20 is filled with oil 23 for oil quenching, and the ceiling plate 22 side has a frame-like support frame for immersing the work W to be quenched in the oil 23. 24 is arrange | positioned by the raising / lowering apparatus 25 so that raising / lowering is possible.
Instead of the oil 23, water for water quenching may be filled. The bottom surface of the pit P may be at the same level as the floor F and surrounded by jetty (not shown) on the four sides, and the side walls 21 of the quenching chamber 20 may be erected on the bottom surface of the pit P. .

  In addition, as shown in the center part of FIG. 2 (B), the carry-out carriage 26 has a pair of rails r in a second travel path R2 sandwiched between the quenching chamber 20 and the first travel path R1. Since the work W is transferred between the carriage 27 having the wheels 28 that roll on the upper side and the upper part of the carriage 27 and the quenching chamber 20, it can slide in the same telescopic manner as described above. And three (a plurality of) tables 29.

Below, the usage method of the said heat processing equipment 1a is demonstrated along FIG.1, FIG.3, FIG.4.
In advance, a plurality of workpieces W to be quenched and tempered are individually placed on a heat-resistant pallet or a predetermined number of heat-resistant racks in groups.
First, as shown in FIG. 1, a plurality (a set) of the workpieces W are sequentially fed into the cleaning chamber 2 from the introduction conveyor c1 to remove dust and oils and fats adhering to the surface by high-pressure air or high-pressure cleaning liquid. Is done. The workpiece W subjected to such cleaning is sequentially fed onto the carry-in conveyor C1.
Next, as shown in FIG. 3, the heat insulation positioned in the main body 5 of the heat retaining chamber 4 from the delivery chamber 12 through the telescoping table 13 with the workpiece W positioned on the most distal side of the carry-in conveyor C <b> 1. The inside of the room 9 is charged. At this time, the door d of the heat insulation chamber 9 is opened and closed together with the airtight door 10, and the airtight door 10 can communicate and block between the delivery chamber 12 and the heat insulation chamber 9.

The workpiece W charged in the heat insulation chamber 9 is heated to a required temperature range (for example, about 850 ° C.) by the plurality of heats h and is held for a predetermined time. Nitrogen gas may be introduced into the heat insulation chamber 9 and the surface layer portion of the workpiece W may be subjected to nitriding treatment.
Next, as shown by the arrows in FIG. 4, the heat retaining chamber 4 travels on the rail r of the first traveling path R1 upward in the drawing, and is an opening of the heating chamber 14 positioned on the upper side in the drawing. The delivery chamber 12 stops at a position where it communicates. In this state, the door d of the heat insulating chamber 9 is opened together with the airtight door 10, and the heated work W is transferred to the heating chamber 14 via the plurality of tables 13 in the delivery chamber 12. The heat insulating chamber 17 located in the main body 15 is charged. At this time, the door d of the heat insulation chamber 17 is opened and closed together with the airtight door 10, and the airtight door 10 communicates and blocks between the delivery chamber 12 and the heat insulation chamber 17.
The workpiece W charged in the heat insulating chamber 17 is heated to a required temperature range (for example, about 930 ° C.) by the plurality of heats h and is held for a predetermined time. Note that a carburizing gas or a carbonitriding gas may be introduced into the heat insulating chamber 17, and carburizing or carbonitriding may be performed on the surface layer portion of the workpiece W.

In the meantime, as shown in FIG. 3, in parallel, another work W that has already been oil-quenched in the quenching chamber 20 passes through the second running path R2 from the quenching chamber 20 as shown in FIG. In the unloading carriage 26 that has been waiting on the rail r, it is delivered to the uppermost table 29 via a plurality of tables 29 arranged on the carriage 26.
As shown by the arrow in FIG. 4, the other workpiece W is conveyed upward on the rail r of the second travel path R2 by the unloading carriage 26 and is closest to the tip of the unloading conveyor C2. It is conveyed to the position where
Furthermore, after the other workpiece W is transferred onto the carry-out conveyor C2 via the table 29 of the carry-out carriage 26, and the oil and fat adhering to the surface in the washing chamber 2 is removed by the washing liquid, After being charged into the tempering furnace 3 and subjected to a tempering process of a required temperature pattern, it is carried out to the outside through the lead-out conveyor c2.

On the other hand, in the heat retaining chamber 4, the different workpieces W previously heated to the required temperature range in the heating chamber 14 located on the lower side in FIG. 4 are transferred into the main body 5 through the delivery chamber 12 in the same manner as described above. After loading, after traveling downward on the rail r of the first travel path R1 in the drawing, the stop is stopped at a position where the delivery chamber 12 communicates with the opening of the airtight door 10 in the quenching chamber 20. To do. At this time, the unloading carriage 26 travels in advance on the rail r of the second traveling path R2 toward the lower retreat position (not shown) in the figure so as not to contact the delivery chamber 12, It is in the evacuation state.
The different workpiece W is inserted into the quenching chamber 20 through the table 13 on the side of the heat retaining chamber 4 and is immersed in the oil 23 while being supported by the frame 24. Oil quenching is applied. The different workpieces W are also transferred onto the table 29 of the unloading carriage 26 in the same manner as described above, and after being conveyed on the rail r of the second traveling path R2 together with the unloading carriage 26, the unloading conveyor C2, It is carried out through the cleaning chamber 2, the tempering furnace 3, and the lead-out conveyor c2.

In addition, the other workpiece W that has been heated in the upper heating chamber 14 in FIG. 4 is also sent into the quenching chamber 20 and subjected to oil quenching in the same manner as the different workpiece W. After that, it is transported on the rail r of the second travel path R2 together with the unloading carriage 26, and is unloaded outside through the unloading conveyor C2, the cleaning chamber 2, the tempering furnace 3, and the outlet conveyor c2.
According to the heat treatment facility 1a having the above-described configuration, the effects (1) to (5) can be reliably achieved.
In the heat treatment facility 1a, the positions of the carry-in conveyor C1 and the carry-out conveyor C2 may be replaced with each other.

  FIG. 5 is a plan view showing a heat treatment facility 1b which is an application form of the heat treatment facility 1a. As shown in FIG. 5, the heat treatment facility 1 b includes the same carry-in / carry-out conveyors C <b> 1 and C <b> 2, a quenching chamber 20, introduction / lead-out conveyors c <b> 1 and c <b> 2, a cleaning chamber 2, and a tempering furnace 3. The heat treatment equipment 1b is different from the heat treatment equipment 1a in that the two heat retaining chambers 4a and 4b travel on the rail r of the first travel path R1, and the first travel path R1 carries in This is a point in which a total of four heating chambers 14 are arranged for each of both upper and lower ends in the illustration with the carry-out conveyors C1 and C2 sandwiched therebetween. As shown in FIG. 5, the quenching chamber 20 is located between the carry-in conveyor C1 and a pair of heating chambers 14 added to the lower end side of the first travel path R1.

In the heat treatment equipment 1b, after the work W is transported to one of the pair of heating chambers 14 in the upper side in FIG. 5 by one heat retaining chamber 4a, the work W is transported into the quenching chamber 20, and the other After the workpiece W is transferred to one of the pair of lower heating chambers 14 in FIG. 5 by the heat retaining chamber 4b, the workpiece W is transferred into the quenching chamber 20 (4a indicated by an arrow on the right side in FIG. 5). Movement range, see 4b movement range). About conveyance of the workpiece | work W other than these, it is the same as that of the case of the said heat processing equipment 1a.
According to the heat treatment equipment 1b as described above, even when the total number of workpieces W to be heat treated per unit time is increased, the effects (1) to (5) can be reliably obtained.
In the heat treatment equipment 1b, the positions of the carry-in conveyor C1 and the carry-out conveyor C2 may be replaced with each other.

FIG. 6 is a plan view showing an application form of the heat treatment equipment 1b and further different heat treatment equipment 1c of the heat treatment equipment 1a.
As shown in FIG. 6, the heat treatment facility 1 c includes the same carry-in / carry-out conveyors C1 and C2, heat insulation chambers 4 a and 4 b, introduction and discharge conveyors c1 and c2, a cleaning room 2, and a tempering furnace 3. Yes. The heat treatment facility 1c is different from the heat treatment facility 1b in that it includes two quenching chambers 20a and 20b and two unloading carts 26a and 26b. As shown in FIG. 6, one quenching chamber 20a is located between the carry-out conveyor C2 and a pair of heating chambers 14 arranged on the upper end side of the first travel path R1, and the other quenching chamber 20b. Is located between the carry-in conveyor C1 and the pair of heating chambers 14 added to the lower end side of the first travel path R1.
The quenching chambers 20a and 20b may be subjected to the same quenching or the same type of quenching. For example, one is for oil quenching and the other is for water quenching or blast quenching. good.

In the heat treatment equipment 1c, one of the heat retaining chambers 4a transports the workpiece W to one of the upper pair of heating chambers 14 in FIG. 6, and further transports the workpiece W into the quenching chamber 20a. It is conveyed to the carry-out conveyor C2 by the carry-out carriage 26a. (Refer to 4a and 26a movement range indicated by arrows on the right side in FIG. 6)
On the other hand, after the work W is transferred to one of the pair of lower heating chambers 14 in FIG. 6 by the other heat retaining chamber 4b and further transferred to the quenching chamber 20b, the other unloading cart is carried out. It is conveyed to the carry-out conveyor C2 by 26b (refer to 4b and 26b movement ranges indicated by arrows on the right side in FIG. 6). About conveyance of the workpiece | work W other than these, it is the same as that of the case of the said heat processing equipment 1b.
According to the heat treatment equipment 1c as described above, even when the total number of workpieces W to be heat treated per unit time is increased, or when different types of quenching are performed for each workpiece W, the above-described effect ( 1) to (5) can be obtained reliably.
In the heat treatment equipment 1b, the positions of the carry-in conveyor C1 and the carry-out conveyor C2 may be replaced with each other.

The present invention is not limited to the embodiments described above.
For example, the carry-in conveyor C1 and the carry-out conveyor C2 may be arranged apart from each other as long as they are substantially parallel.
Further, the direction of the first or second traveling path R1, R2 may be substantially perpendicular to the longitudinal direction of the carry-in conveyor C1 and the carry-out conveyor C2, and is not limited to a straight form in plan view, It is also possible to adopt a form that is gently inclined or curved.
Furthermore, the tempering furnace 3 may be an annealing furnace or may have an annealing function.
In addition, the first or second traveling path R1, R2 is a guide strip made of iron plate embedded in the floor F along the surface of the floor F, and is magnetically guided along the guide strip. The heat retaining chamber or the transport carriage may be run.

  According to the present invention, heat treatment such as quenching can be continuously performed on a plurality of workpieces, and heat treatment equipment that can be installed in a relatively small space and that is relatively inexpensive can be reliably provided.

1a to 1c ……………… Heat treatment equipment 4,4a, 4b …… Insulation chamber 10 ………………………… Airtight door 14 ……………………… Heating chamber 12 …… …………………… Delivery chamber 20, 20a, 20b… Quenching chamber 26, 26a, 26b… Unloading cart 29 ……………………… Table W ………………………… Work C1 ……………………… Loading conveyor C2 ……………………… Unloading conveyor R1 ………………………… First traveling path R2 ……………………… First traveling Road P ………………………… Pit

Claims (5)

A heat treatment facility for continuously quenching a plurality of workpieces,
A carry-in conveyor and a carry-out conveyor for works that are parallel to each other;
A heat-retaining chamber that receives the work conveyed on the carry-in conveyor inside through a delivery chamber and travels along a first traveling path along a direction intersecting with the longitudinal direction of the carry-in conveyor and the carry-out conveyor;
A plurality of heating chambers disposed on at least one end side of the first traveling path and receiving the workpiece from the heat retaining chamber through the delivery chamber;
The work is disposed from the heat-retaining chamber, which is disposed at least on the other end side of the first traveling path and is received inside again through the delivery chamber. A quenching room that accepts and quenches,
Receiving the work that has been quenched in the quenching chamber, and including a carry-out carriage that runs on a second running path located between the carry-in conveyor and the carry-out conveyor and the first running path,
The hermetic door used for inserting and discharging the workpiece in the quenching chamber opens and closes a single doorway that opens to the first traveling path and the second traveling path,
The unloading carriage is equipped with a plurality of tables that can be slid sideways to deliver the quenched workpiece onto the unloading conveyor.
Heat treatment equipment characterized by that. The quenching chamber is for subjecting the workpiece to oil quenching or water quenching, and its periphery is surrounded by pits in plan view,
The heat treatment facility according to claim 1. The plurality of heating chambers can perform a carburizing process on the workpiece.
The heat treatment equipment according to claim 1 or 2, wherein The unloading carriage is equipped with a plurality of slidable telescopic tables along the horizontal direction perpendicular to the second traveling path,
The heat treatment facility according to any one of claims 1 to 3, wherein the heat treatment facility is provided. The plurality of heating chambers are disposed on one end side in the first traveling path,
The quenching chamber is disposed on the other end side in the first traveling path,
The heat treatment facility according to any one of claims 1 to 4, wherein the heat treatment facility is provided.

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