CN211339667U - Loading and unloading system of annular rotary-bottom type gas carburizing furnace for gear carburizing heat treatment - Google Patents
Loading and unloading system of annular rotary-bottom type gas carburizing furnace for gear carburizing heat treatment Download PDFInfo
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- CN211339667U CN211339667U CN201922080707.9U CN201922080707U CN211339667U CN 211339667 U CN211339667 U CN 211339667U CN 201922080707 U CN201922080707 U CN 201922080707U CN 211339667 U CN211339667 U CN 211339667U
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Abstract
The utility model provides a dress discharge system of gear carburization thermal treatment's annular rotary hearth gas carburizing furnace, in large-scale annular rotary hearth gas carburizing thermal treatment furnace equipment carries out carburization thermal treatment's work flow to the gear, the charging tray that has the gear is in the transfer work between the quenching waiting station of annular rotary hearth furnace business turn over material station and quenching groove, is responsible for by the mechanical fork arm hand of inner ring charging tray transfer machine. The mechanical arm of the inner ring tray transfer machine is hermetically assembled with the sliding sealing furnace door. Therefore, no outside air enters the furnace when the material tray is transferred at the feeding and discharging station of the annular rotary hearth furnace and the quenching waiting station of the quenching tank. The possibility that air outside the furnace enters the furnace is greatly reduced, the key index IGO of the gear is ensured to reach the national standard, and the technical bottleneck of the application of the large annular rotary hearth gas carburizing furnace in the field of gear heat treatment is solved.
Description
Technical Field
The utility model belongs to the technical field of the industrial furnace, especially, relate to a dress discharge system of gear carburization thermal treatment's large-scale annular rotary hearth gas carburizing furnace.
Background
The gear carburizing heat treatment is typically performed on a shaft gas carburizing furnace. The pit-type gas carburizing furnace belongs to a gas carburizing furnace with periodic operation. Is suitable for small-batch gear carburizing production operation. The prior production process is mature, and the product quality and performance are stable and reliable. However, with the increase of the demand of the gear market, orders of some enterprises are stable, and the demand of products is large, so that the enterprises gradually select a large annular rotary hearth gas carburizing furnace (hereinafter referred to as a large annular rotary hearth gas carburizing furnace) for production. The large annular rotary hearth gas carburizing furnace is continuous in production operation and high in gear heat treatment yield, but due to the restriction of the structural form of the large annular rotary hearth gas carburizing furnace, the sealing performance of the large annular rotary hearth gas carburizing furnace is much poorer than that of a well type gas carburizing furnace, so that the key performance index IGO (intergranular oxidation) of the gear subjected to heat treatment on the large annular rotary hearth gas carburizing furnace is difficult to reach the national standard, and the qualified rate of the product is low. In order to improve the qualification rate of products and ensure that the key performance index IGO of gear carburization reaches the national standard, the possibility that air outside the furnace enters a large annular rotary hearth gas carburizing furnace needs to be reduced.
The invention discloses a charging tray transfer machine which is designed on the inner ring side of a large annular rotary-bottom gas carburizing furnace, a channel section is designed on the inner ring of the large annular rotary-bottom gas carburizing furnace, and a sliding sealing furnace door matched with the charging tray transfer machine is designed.
A charging and discharging machine is arranged on the outer ring side of the large annular rotary hearth gas carburizing furnace, an intermediate door is arranged between the outer ring of the large annular rotary hearth gas carburizing furnace and a quenching tank, and a furnace door matched with the charging and discharging machine is arranged behind the quenching tank. The design greatly reduces the possibility that air outside the furnace enters the furnace, ensures that the key index IGO of the gear reaches the national standard, and solves the technical bottleneck of the application of a large annular rotary hearth gas carburizing furnace in the field of gear carburizing heat treatment.
Disclosure of Invention
In view of this, the present invention provides a charging and discharging system for a large annular rotary hearth gas carburizing furnace for gear carburizing heat treatment, which can solve the above problems.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a charging and discharging system of a large annular rotary hearth type gas carburizing furnace for gear carburizing heat treatment comprises an annular rotary hearth furnace, an inner ring material tray transfer machine, a channel section, a quenching tank and an outer ring charging and discharging machine, wherein the annular rotary hearth furnace is enclosed into a circular ring structure and internally provided with a plurality of stations, the quenching device is characterized in that the quenching device is sequentially arranged and transferred in an annular rotary hearth furnace, an inner ring material tray transfer machine is arranged at the inner position of the annular rotary hearth furnace, the inner ring material tray transfer machine is communicated with the annular rotary hearth furnace through a channel section, a mechanical arm fork of the inner ring material tray transfer machine is stretched in a feeding and discharging station of the annular rotary hearth furnace through the channel section, an outer ring material loading and discharging machine is arranged at the outer position of the annular rotary hearth furnace, a quenching groove is communicated with the outer side of the annular rotary hearth furnace, the mechanical arm fork of the outer ring material loading and discharging machine is stretched in the feeding and discharging station of the annular rotary hearth furnace through a quenching groove, and the channel section and the quenching groove are respectively arranged at the inner side and the outer side of the.
Further, the quenching tank comprises a quenching waiting station 7, a quenching station, a lifter and a sizing block, the quenching waiting station is located above the quenching station, the lifter drives the sizing block to lift between the quenching waiting station and the quenching station, a quenching tank door is arranged on the outward side of the quenching waiting station, and a heat treatment workpiece gear conveyed by a mechanical arm fork of the outer ring discharging machine is placed on the sizing block.
Furthermore, the quenching waiting station and the annular rotary hearth furnace are separated by a liftable middle door, the feeding and discharging station and the first station of the heating area are separated by a liftable middle door in the first furnace, and the feeding and discharging station and the last station of the reheating area are separated by a liftable middle door in the second furnace.
Furthermore, an inner ring sliding sealing furnace door is installed on one side, facing the inner ring material tray transfer machine, of the channel section, and a mechanical arm fork of the inner ring material tray transfer machine penetrates through the inner ring sliding sealing furnace door and then is inserted into the channel section.
Further, the annular rotary hearth furnace comprises a furnace shell steel structure, a furnace lining, a furnace bottom and a furnace bottom cushion block, the furnace shell steel structure is fixed on the outer side of the furnace lining, the furnace bottom is located at the bottom of the station, the furnace bottom cushion block is arranged at the upper end of the furnace bottom, and the upper end of the furnace bottom cushion block bears a heat treatment workpiece gear.
Compared with the prior art, the charging and discharging system of the large annular rotary bottom type gas carburizing furnace for the gear carburizing heat treatment has the following advantages: in the work flow of the large-scale annular rotary-bottom type gas carburizing heat treatment furnace equipment for carrying out carburizing heat treatment on the gear, only when the material is charged and discharged, the quenching tank door has to be opened. The transfer work of the material tray with the gear between the feeding and discharging station of the annular rotary hearth furnace and the quenching waiting station of the quenching tank is carried out by a mechanical fork arm hand of the inner ring material tray transfer machine, the mechanical fork arm hand of the inner ring material tray transfer machine works in the channel section, the annular rotary hearth furnace and the quenching tank all the time, and the mechanical fork arm hand of the inner ring material tray transfer machine stays in the channel to stand by when the task is waiting. And the mechanical arm of the inner ring tray transfer machine is hermetically assembled with the sliding sealing furnace door. Therefore, no outside air enters the furnace when the material tray is transferred at the feeding and discharging station of the annular rotary hearth furnace and the quenching waiting station of the quenching tank. The possibility that air outside the furnace enters the furnace is greatly reduced, the key index IGO of the gear is ensured to reach the national standard, and the technical bottleneck of the application of the large annular rotary hearth gas carburizing furnace in the field of gear heat treatment is solved.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of the inner ring tray transfer machine, the outer ring loading and unloading machine, the quenching tank and the channel section in FIG. 1;
FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 1;
FIG. 4 is an enlarged schematic view of the right portion of FIG. 3;
FIG. 5 is an enlarged schematic view of the left portion of FIG. 3;
description of reference numerals:
1-outer ring loading discharging machine; 2-heat treating the workpiece gear; 3-material tray; 4-quenching tank; 5-quenching slot door; 6-outer ring loading mechanical arm fork of the discharging machine; 7-quenching waiting station; 8-a lifter; 9-sizing block; 10-annular rotary hearth furnace; 11-a middle door; 12-inner ring tray transfer machine; 13-mechanical arm fork of the inner ring material tray transfer machine; 14-a channel segment; 15-feeding and discharging station; 16-a bottom block; 17-a first station of heating zones; 18-first in-furnace intermediate door; 19-furnace bottom; 20-last station of reheating zone; 21-a second in-furnace intermediate door; 22-a quenching station; 23-inner ring sliding sealing oven door; 24-furnace shell steel structure; 25-furnace lining; 26-electric heater.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in figures 1-5, a charging and discharging system of a large annular rotary hearth gas carburizing furnace for gear carburizing heat treatment comprises an annular rotary hearth furnace 10, an inner ring tray transfer machine 12, a channel section 14, a quenching tank 4 and an outer ring charging and discharging machine 1, wherein the annular rotary hearth furnace 10 encloses a circular ring structure and comprises a plurality of stations, the stations are sequentially arranged and transferred in the annular rotary hearth furnace 10, the inner ring tray transfer machine 12 is arranged at the inner position of the annular rotary hearth furnace 10, the inner ring tray transfer machine 12 is communicated with the annular rotary hearth furnace 10 through the channel section 14, a mechanical arm fork 13 of the inner ring tray transfer machine 12 is extended and contracted to a charging and discharging station 15 of the annular rotary hearth furnace 10 through the channel section 14, the outer ring charging and discharging machine 1 is arranged at the outer position of the annular rotary hearth furnace 10, the quenching tank 4 is communicated with the outer side of the annular rotary hearth furnace 10, a mechanical arm fork 6 of the outer ring charging and discharging machine is extended and contracted to the charging and discharging station 15 of the annular rotary hearth furnace 10 through the quenching tank 4, the channel section 14 and the quenching tank 4 are respectively arranged at the inner side and the outer side of a feeding and discharging station 15 of the annular rotary hearth furnace 10.
The quenching tank 4 comprises a quenching waiting station 7, a quenching station 22, a lifter 8 and a sizing block 9, wherein the quenching waiting station 7 is positioned above the quenching station 22, the lifter 8 drives the sizing block 9 to lift between the quenching waiting station 7 and the quenching station 22, a quenching tank door 5 is arranged on one outward side of the quenching waiting station 7, and a heat treatment workpiece gear 2 conveyed by a mechanical arm fork 6 of an outer ring discharging machine is placed on the sizing block 9.
The quenching waiting station 7 is separated from the annular rotary hearth furnace 10 through a liftable middle door 11, the feeding and discharging station 15 is separated from the first station 17 of the heating area through a liftable middle door 18 in the first furnace, and the feeding and discharging station 15 is separated from the last station 20 of the reheating area through a liftable middle door 21 in the second furnace.
An inner ring sliding sealing furnace door 23 is installed on one side, facing the inner ring tray transfer machine 12, of the channel section 14, and a mechanical arm fork 13 of the inner ring tray transfer machine penetrates through the inner ring sliding sealing furnace door 23 and then is inserted into the channel section 14.
The annular rotary hearth furnace 10 comprises a furnace shell steel structure 24, a furnace lining 25, a furnace bottom 19 and a furnace bottom cushion block 16, wherein the furnace shell steel structure 24 is fixed on the outer side of the furnace lining 25, the furnace bottom 19 is positioned at the bottom of a station, the furnace bottom cushion block 16 is arranged at the upper end of the furnace bottom 19, and the upper end of the furnace bottom cushion block 16 bears a heat treatment workpiece gear 2.
A charging and discharging method of a large annular rotary-bottom gas carburizing furnace for gear carburizing heat treatment comprises the following steps:
step A, charging: the outer ring charging and discharging machine 1 conveys a material tray 3 provided with a heat treatment workpiece gear 2 to the outside of a quenching tank 4, and lifts the material tray to a charging height to prepare for entering an annular rotary hearth furnace 10; then the quenching tank door 5 is lifted and opened, and a mechanical arm fork 6 of an outer ring discharge machine conveys the material tray 3 provided with the heat treatment workpiece gear 2 to a quenching waiting station 7 of the quenching tank 4, namely a sizing block 9 of a lifter 8 in the quenching tank 4; a mechanical arm fork 6 of the outer ring loading and discharging machine is withdrawn from the quenching tank 4, and a quenching tank door 5 is closed by descending;
then, the middle door 11 between the annular rotary hearth furnace 10 and the quenching tank 4 is lifted and opened, the mechanical arm fork 13 of the inner ring material tray transfer machine moves forward from the channel section 14, goes over the feeding and discharging station 15 of the annular rotary hearth furnace 10 and reaches the quenching waiting station 7 of the quenching tank, the mechanical arm fork 13 of the inner ring material tray transfer machine lifts the material tray 3 with the heat treatment workpiece gear 2 away from the sizing block 9 of the lifter 8 and returns to the feeding and discharging station 15 of the annular rotary hearth furnace, the material tray 3 with the gear 2 is lightly placed on the furnace bottom cushion block 16 of the annular rotary hearth furnace 10, the middle door 11 descends and is closed, and meanwhile, the mechanical arm fork 13 of the inner ring material tray transfer machine continuously returns to the channel section 14 to wait, and the charging process is completed.
Step B, carburizing heat treatment: firstly, a first in-furnace intermediate door 18 between a feeding and discharging station 15 and a first heating zone station 17 in an annular rotary hearth furnace 10 is lifted and opened, a furnace bottom 19 of the annular rotary hearth furnace 10 rotates by an angle, a material tray 3 with a heat treatment workpiece gear 2 of the feeding and discharging station 15 is transferred to the first heating zone station 17, and the first in-furnace intermediate door 18 between the feeding and discharging station 15 and the first heating zone station 17 is descended and closed;
the heat treatment workpiece gear 2 is transferred in the furnace along with the furnace bottom 19 of the annular rotary hearth furnace 10 on the material tray 3 according to the takt time, the heat treatment processes of heating, carburizing, diffusing, cooling and reheating are sequentially completed, the heat treatment process reaches the last station 20 of a reheating zone, and the carburizing heat treatment process is ended.
Step C, quenching: firstly, a second in-furnace intermediate door 21 between the last station 20 of the reheating zone in the annular rotary hearth furnace 10 and the feeding and discharging station 15 in the annular rotary hearth furnace 10 is lifted to be opened, the furnace bottom 19 of the annular rotary hearth furnace 10 rotates for an angle, the material tray 3 with the heat treatment workpiece gear 2 in the reheating zone is transferred to the feeding and discharging station 15 in the annular rotary hearth furnace 10, and the second in-furnace intermediate door 21 between the last station 20 of the reheating zone and the feeding and discharging station 15 is descended to be closed;
then, an intermediate door 11 between the annular rotary hearth furnace 10 and the quenching tank 4 is lifted and opened, a mechanical arm fork 13 of the inner ring material tray transfer machine advances from a channel section 14 to a feeding and discharging station 15 in the annular rotary hearth furnace 10, the mechanical arm fork 13 of the inner ring material tray transfer machine supports the material tray 3 provided with the heat treatment workpiece gear 2, the material tray continues to advance to a quenching waiting station 7 of the quenching tank 4, and the material tray 3 provided with the heat treatment workpiece gear 2 is lightly placed on a sizing block 9 of a lifting machine 8 in the quenching tank 4; then, a mechanical arm fork 13 of the inner ring tray transfer machine retracts to the channel section 14, and meanwhile, an intermediate door 11 between the annular rotary hearth furnace 10 and the quenching tank 4 descends and is closed;
then, the lifter 8 in the quenching tank 4 rapidly descends, and the lifter 8 rapidly immerses the sizing block 9, the feeding disc 3 and the heat treatment workpiece gear 2 into a quenching station 22 below quenching liquid in the quenching tank for quenching; after the quenching is finished, the lifter 8 lifts the material tray 3 with the heat treatment workpiece gear 2 to return to the quenching waiting station 7 of the quenching tank 4, and the quenching process is finished.
In the step D, discharging: firstly, lifting and opening a quenching tank door 5, extending a mechanical arm fork 6 of an outer ring discharge machine into a quenching waiting station 7 of a quenching tank 4, supporting a material tray 3 provided with a heat treatment workpiece gear 2 away from a sizing block 9 of a lifter 8 in the quenching tank 4, then withdrawing the material tray out of the quenching tank door 5, and simultaneously, descending and closing the quenching tank door 5; the outer ring charging and discharging machine 1 conveys a material tray 3 loaded with a heat treatment workpiece gear 2 to the next working procedure; and finishing the discharging process.
A charging tray transfer machine is designed on a large annular rotary-bottom gas carburizing furnace, a channel section 14 is designed on an inner ring of the large annular rotary-bottom gas carburizing furnace, and a sliding sealing furnace door matched with the charging tray transfer machine is designed. A sliding sealing furnace door, a channel section 14, an annular rotary hearth furnace 10, a quenching tank 4 and a quenching tank door 5 of the large annular rotary hearth gas carburizing furnace form a closed cavity. The mechanical arm fork of the tray transfer machine works in the channel section, the annular rotary hearth furnace and the quenching tank all the time, and is responsible for transferring the tray 3 with the heat treatment workpiece gear 2 between the feeding and discharging station of the annular rotary hearth furnace and the quenching waiting station 7 of the quenching tank 4. When the actions are carried out, the sliding sealing furnace door matched with the charging tray transfer machine and the quenching tank door matched with the charging and discharging machine are in a closed state, so that no external air enters the furnace.
The outer ring charging and discharging machine is only responsible for charging and discharging, the quenching tank door 5 is opened only during charging and discharging, and the middle door of the annular rotary hearth furnace is closed during charging and discharging of the outer ring charging and discharging machine.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a dress discharge system of gear carburization thermal treatment's annular rotary hearth formula gas carburizing furnace which characterized in that: comprises an annular rotary hearth furnace (10), an inner ring material tray transfer machine (12), a channel section (14), a quenching tank (4) and an outer ring material loading and discharging machine (1), wherein the annular rotary hearth furnace (10) is enclosed into a circular ring structure and internally provided with a plurality of stations, the inner ring material tray transfer machine (12) is arranged in the annular rotary hearth furnace (10) in sequence and transferred, the inner ring material tray transfer machine (12) is arranged at the inner ring position of the annular rotary hearth furnace (10), the inner ring material tray transfer machine (12) is communicated with the annular rotary hearth furnace (10) through the channel section (14), a mechanical arm fork hand (13) of the inner ring material tray transfer machine (12) is stretched in and out a material feeding and discharging station (15) of the annular rotary hearth furnace (10) through the channel section (14), the outer ring material loading and discharging machine (1) is arranged at the outer ring position of the annular rotary hearth furnace (10), the quenching tank (4) is communicated with the outer side of the annular rotary hearth furnace (10), the mechanical arm fork hand (6) of the outer ring material loading and discharging machine is stretched in and out the quenching fork hand (15), the channel section (14) and the quenching tank (4) are respectively arranged at the inner side and the outer side of a feeding and discharging station (15) of the annular rotary hearth furnace (10).
2. The charging and discharging system of the ring rotary hearth gas carburizing furnace for gear carburizing heat treatment according to claim 1, characterized in that: quenching groove (4) are including quenching and wait for station (7), quenching station (22), lift (8) and parallels (9), and quenching waits for station (7) to be located quenching station (22) top, and lift (8) drive parallels (9) and go up and down between quenching and wait for station (7) and quenching station (22), and one side outwards of quenching waiting for station (7) is located in quenching groove door (5), places heat treatment workpiece gear (2) carried by arm fork hand (6) of outer loop dress ejection of compact machine on parallels (9).
3. The charging and discharging system of the ring rotary hearth gas carburizing furnace for gear carburizing heat treatment according to claim 2, characterized in that: the quenching waiting station (7) and the annular rotary hearth furnace (10) are separated by a liftable middle door (11), the feeding and discharging station (15) and the first station (17) of the heating area are separated by a liftable middle door (18) in the first furnace, and the feeding and discharging station (15) and the last station (20) of the reheating area are separated by a liftable middle door (21) in the second furnace.
4. The charge and discharge system of the ring rotary hearth gas carburizing furnace for gear carburizing heat treatment according to any one of claims 1 to 3, characterized in that: an inner ring sliding sealing furnace door (23) is installed on one side, facing the inner ring tray transfer machine (12), of the channel section (14), and a mechanical arm fork (13) of the inner ring tray transfer machine penetrates through the inner ring sliding sealing furnace door (23) and then is inserted into the channel section (14).
5. The charging and discharging system of the ring rotary hearth gas carburizing furnace for gear carburizing heat treatment according to claim 1, characterized in that: annular rotary hearth furnace (10) are including stove outer covering steel construction (24), furnace lining (25), stove bottom (19) and stove bottom cushion (16), and stove outer covering steel construction (24) are fixed in furnace lining (25) outside, and stove bottom (19) are located the bottom of station, and stove bottom cushion (16) are located stove bottom (19) upper end, and stove bottom cushion (16) upper end bears heat treatment work piece gear (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922080707.9U CN211339667U (en) | 2019-11-27 | 2019-11-27 | Loading and unloading system of annular rotary-bottom type gas carburizing furnace for gear carburizing heat treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922080707.9U CN211339667U (en) | 2019-11-27 | 2019-11-27 | Loading and unloading system of annular rotary-bottom type gas carburizing furnace for gear carburizing heat treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835721A (en) * | 2019-11-27 | 2020-02-25 | 特诺恩技术（天津）有限公司 | Charging and discharging mechanism of large annular rotary bottom type gas carburizing furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835721A (en) * | 2019-11-27 | 2020-02-25 | 特诺恩技术（天津）有限公司 | Charging and discharging mechanism of large annular rotary bottom type gas carburizing furnace |
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