CN116623121A - Carburizing and quenching heat treatment device for gear - Google Patents
Carburizing and quenching heat treatment device for gear Download PDFInfo
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- CN116623121A CN116623121A CN202310902559.2A CN202310902559A CN116623121A CN 116623121 A CN116623121 A CN 116623121A CN 202310902559 A CN202310902559 A CN 202310902559A CN 116623121 A CN116623121 A CN 116623121A
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- 238000005255 carburizing Methods 0.000 title claims abstract description 59
- 238000010791 quenching Methods 0.000 title claims abstract description 39
- 230000000171 quenching effect Effects 0.000 title claims abstract description 39
- 238000010438 heat treatment Methods 0.000 title claims abstract description 26
- 230000002093 peripheral effect Effects 0.000 claims abstract description 37
- 239000002131 composite material Substances 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 68
- 239000007921 spray Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- 230000033001 locomotion Effects 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The application discloses a carburizing and quenching heat treatment device for gears, which comprises a carburizing and quenching furnace, a composite rotating support piece, a first nozzle and a second nozzle of a heating mechanism, wherein the carburizing and quenching furnace is used for accommodating a plurality of cylindrical gear blanks; the second nozzle injects carburizing gas onto the outer peripheral surfaces of the plurality of cylindrical gear blanks. In the application, the outer sides of the cylindrical gear blanks synchronously rotate by utilizing the composite rotating support member, so that the problem of uneven concentration of the outer sides of the cylindrical gear blanks caused by the problem of distribution of the first nozzles is solved; the problem of the low concentration of carburizing gas on the inner peripheral surface of the cylindrical gear blank is solved by providing the second nozzle.
Description
Technical Field
The application relates to the technical field of gear heat treatment, in particular to a carburizing and quenching heat treatment device for gears.
Background
Carburization is a treatment of metal surface, and is characterized by that the workpiece is placed in the active carburization medium, heated to 900-950 deg.C single-phase austenite zone, and after heat-insulating for enough time, the active carbon atoms decomposed from carburization medium can be infiltrated into the surface layer of steel workpiece so as to obtain high carbon surface layer, and its core portion can retain original components. This is a common heat treatment process for metallic materials.
In the prior art, the above problems are generally solved by a carburizing apparatus, for example, the application number is: 201610757935.3 it is mainly a support seat in order to place the work piece, and the support seat only can the fixed work piece of placing, if when placing a plurality of work pieces on it simultaneously, the carburizing gas concentration of the side that every work piece was close to the gas release mouth is greater than one side dorsad to lead to carburization inhomogeneous, and in this application document, although be provided with the fan blade in the stove, the fan blade can play certain air circulation effect.
But is disposed at the top of the furnace, which tends to perform a longitudinal air circulation, and it is difficult to ensure uniformity of carbon concentration; and when the workpiece is cylindrical, the inner circumferential surface thereof is hard to be blown by wind, resulting in poor carburization of the inner circumferential surface.
Disclosure of Invention
The application aims to provide a carburizing and quenching heat treatment device for gears, which is used for solving the technical problems that when a plurality of workpieces are carburized simultaneously in the prior art, the concentration of carburizing gas on one side of each workpiece, which is close to a gas release port, is larger than that on the opposite side and the concentration of carburizing gas on the inner peripheral surface of a cylindrical workpiece is low.
In order to solve the technical problems, the application specifically provides the following technical scheme:
a carburizing and quenching heat treatment device for gears is provided with:
the carburizing and quenching furnace is used for accommodating a plurality of cylindrical gear blanks;
the composite rotary support piece penetrates through the bottom end of the carburizing and quenching furnace and is used for enabling the plurality of cylindrical gear blanks to rotate by taking the central axis of the composite rotary support piece as the center, and enabling a single cylindrical gear blank to rotate by taking the central axis of the cylindrical gear blank as the center;
a heating mechanism for heating the plurality of cylindrical gear blanks to a preset temperature;
the first nozzle is arranged in the carburizing and quenching furnace and positioned at any side of the composite rotary support so as to spray carburizing gas on the outer peripheral surfaces of the cylindrical gear blanks;
and the second nozzle is arranged in the carburizing and quenching furnace and is positioned above the composite rotating support piece so as to spray carburizing gas on the outer peripheral surfaces of the cylindrical gear blanks.
As a preferable scheme of the application, the composite rotary supporting piece comprises a first transmission shaft, a main circular truncated cone and a plurality of sub circular truncated cones, wherein the sub circular truncated cones are uniformly and rotatably arranged on the main circular truncated cone along the circumferential direction of the main circular truncated cone, and the first transmission shaft extends from the outside to the inside of the carburizing quenching furnace to the main circular truncated cone so as to drive the main circular truncated cone to rotate.
As a preferable scheme of the application, the composite rotary supporting piece further comprises a plurality of second transmission shafts, the second transmission shafts extend to the side edges of the plurality of sub round tables from the outside to the inside of the carburizing and quenching furnace, and the second transmission shafts and the sub round tables are in one-to-one correspondence to carry out meshing transmission;
the plurality of second transmission shafts are all driven through the same driving structure.
As a preferable scheme of the application, the driving structure comprises a master conical gear and two sub conical gears, tooth surfaces of the two sub conical gears are oppositely arranged, one sub conical gear is installed on the first transmission shaft, the other sub conical gear is rotatably installed on the first transmission shaft and is provided with a linkage ring, and the outer peripheral surface of the linkage ring and the plurality of second transmission shafts are in meshed transmission;
the female bevel gear is meshed with the two sub bevel gears at the same time so as to drive the two sub bevel gears to rotate reversely at the same time, and the female bevel gear is connected with an output shaft of the motor.
As a preferable scheme of the application, the sub round table is provided with a bulge, and the bulge is used for being sleeved on the inner peripheral surface of the cylindrical gear blank.
As a preferable scheme of the application, the sub-round table is provided with a through hole along a central line of the sub-round table, and the diameter of the through hole is larger than or equal to the inner diameter of the cylindrical gear blank.
As a preferable mode of the present application, the projection includes a power mechanism for abutting against an inner peripheral surface of the cylindrical gear blank to limit the cylindrical gear blank, and a plurality of jack rods for providing power to the plurality of jack rods;
and the plurality of ejector rods can periodically move to avoid dead angles on the inner peripheral surface of the cylindrical gear blank, wherein the dead angles cannot contact carburizing gas.
As a preferable scheme of the application, a plurality of hinging rods are uniformly distributed on the inner peripheral surface of the through hole, and the plurality of ejector rods are rotatably arranged on the hinging rods in pairs;
the hinge rod is provided with an arc convex surface, and the arc convex surface is used for enabling the ejector rod to rotate along the radian of the inner peripheral surface of the cylindrical gear blank.
As a preferable scheme of the application, the power mechanism comprises a transmission part and a quadrilateral movable frame, wherein one group of ejector rods are respectively arranged on two sides of one end of the quadrilateral movable frame, so that when the other end of the quadrilateral movable frame reciprocates along the axial direction of the through hole, one group of ejector rods can realize switching of opening and closing actions;
the transmission piece is used for providing power for one end of the quadrangular movable frame far away from the cylindrical gear blank.
As a preferable scheme of the application, the through holes extend to the mother round platform, a plurality of transmission discs are rotatably arranged below the mother round platform, the transmission discs are in one-to-one correspondence with the through holes, and the transmission discs and the second transmission shaft are in meshed transmission;
the transmission disc is provided with a plurality of extrusion protrusions along the circumference of the transmission disc, and the extrusion protrusions can extrude one end, far away from the cylindrical gear blank, of the quadrangular movable frame.
Compared with the prior art, the application has the following beneficial effects:
in the application, in order to enable a plurality of cylindrical gear blanks to be carburized at the same time and ensure that the concentration of carburized gas is relatively uniform, the application solves the problem of uneven concentration of the outer sides of the plurality of cylindrical gear blanks caused by the problem of the distribution of a first nozzle by utilizing a mode of synchronously rotating the outer sides of the plurality of cylindrical gear blanks by utilizing a composite rotating support piece; moreover, the compound rotary supporting piece is utilized to enable the single cylindrical gear blank to solve the problem of uneven concentration of the side opposite to the first nozzle and the side opposite to the first nozzle caused by the arrangement position; and in the application, the second nozzle is arranged to enable the inner peripheral surface of the cylindrical gear blank to be in the same carburized gas concentration on the outer peripheral surface, so that carburization uniformity of the outer peripheral surface and the inner peripheral surface is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
FIG. 1 is a cross-sectional view of an overall structure in an embodiment of the application;
FIG. 2 is a top view of the overall structure of an embodiment of the present application;
fig. 3 is a schematic structural view of a quadrilateral movable frame according to an embodiment of the present application.
Reference numerals in the drawings are respectively as follows:
1. carburizing and quenching furnace; 2. a composite rotational support; 3. a cylindrical gear blank; 4. a first nozzle; 5. a second nozzle;
21. a first drive shaft; 22. a mother round table; 23. a sub round table; 24. a second drive shaft; 25. a female bevel gear; 26. a sub-bevel gear; 27. a protrusion; 28. a through hole; 29. a linkage ring;
271. a push rod; 272. a hinge rod; 273. a transmission member; 274. a quadrilateral movable frame; 2731. a drive plate; 2732. the protrusion is pressed.
Description of the embodiments
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1 to 3, the present application provides a carburizing and quenching heat treatment device for gears, comprising:
a carburizing and quenching furnace 1 for accommodating a plurality of cylindrical gear blanks 3;
a composite rotary support 2 penetrating through the bottom end of the carburizing and quenching furnace 1, for rotating the plurality of cylindrical gear blanks 3 around the central axis of the composite rotary support 2, and simultaneously rotating a single cylindrical gear blank 3 around the central axis of the cylindrical gear blank 3;
a heating mechanism for heating the plurality of cylindrical gear blanks 3 to a preset temperature;
a first nozzle 4 disposed in the carburizing and quenching furnace 1 and located at either side of the composite rotary support 2 to spray carburizing gas onto the outer peripheral surfaces of the plurality of cylindrical gear blanks 3;
a second nozzle 5 is provided in the carburizing and quenching furnace 1 above the composite rotary support 2 to spray carburizing gas on the outer peripheral surfaces of the plurality of cylindrical gear blanks 3.
When the number of the first nozzles 4 is 1 and the number of the second nozzles 5 is 1, the first nozzles 4 are arranged obliquely in order to avoid the influence of gravity, considering that the density of the injected carburizing gas may be slightly higher or lower than that of air.
The second nozzles 5 are also arranged at the same inclination degree, and the injection flow rate of the second nozzles 5 is reduced in equal proportion according to the area of the inner circumferential surface and the area of the outer circumferential surface, and the inner circumferential surface and the outer circumferential surface of the cylindrical gear blank 3 are difficult to influence each other, so that the concentration of carburizing gas of the inner circumferential surface and the outer circumferential surface can be ensured to be similar to a certain extent.
Since the number of the first nozzles 4 is 1, the concentration of one side of the carburizing and quenching furnace 1 near the first nozzles 4 is higher than that of the other side, and thus in the present embodiment, this problem is solved by the integral rotation of the plurality of cylindrical gear blanks 3.
Since the single cylindrical gear blank 3 also has a carburizing gas high side and a carburizing gas low side, this problem is solved by the rotation of the single cylindrical gear blank 3.
So that the cylindrical gear blank 3 is carburized as uniformly as possible by the compound motion of the compound rotary support 2.
In this process, the second nozzle 5 is longitudinally inclined to spray, the flow rate is small, the gas is concentrated, and the carburization condition is not complex, so that the problem of just facing one side and facing the other side of the inner peripheral surface of the single cylindrical gear blank 3 only exists, and the problem can be solved through the autorotation of the single cylindrical gear blank 3.
In summary, in the present application, in order to carburize the plurality of cylindrical gear blanks 3 simultaneously and ensure that the concentration of carburized gas is relatively uniform, the present application uses the composite rotation support 2 to synchronously rotate the outer sides of the plurality of cylindrical gear blanks 3, so as to solve the problem of uneven concentration of the outer sides of the plurality of cylindrical gear blanks 3 caused by the distribution of the first nozzles 4.
Moreover, the compound rotary supporting piece 2 is utilized to enable the single cylindrical gear blank 3 to solve the problem of uneven concentration on the side opposite to the first nozzle 4 and the side opposite to the first nozzle 4 caused by the arrangement position; and in the present application, the second nozzle 5 is provided so that the inner peripheral surface of the cylindrical gear blank 3 can be at the same carburizing gas concentration on the outer peripheral surface thereof, thereby ensuring uniform carburization of the outer peripheral surface and the inner peripheral surface.
In order to solve the problem that the driving structure for providing the power of the composite rotary support 2 is easily damaged at high temperature, preferably, the composite rotary support 2 includes a first transmission shaft 21, a main circular table 22, and a plurality of sub circular tables 23, the plurality of sub circular tables 23 are uniformly rotatably mounted on the main circular table 22 along the circumferential direction of the main circular table 22, and the first transmission shaft 21 extends from the carburizing quenching furnace 1 to the main circular table 22 from the outside to the inside so as to drive the main circular table 22 to rotate.
By utilizing the advantage of the length of the first transmission shaft 21, the first transmission shaft 21 can be filled with materials with poor heat conduction, so that the temperature of the outer end of the first transmission shaft 21 is lower.
In addition, the first transmission shaft 21 is arranged in a penetrating manner, and the furnace body can be directly used as a bearing object of the first transmission shaft 21, so that the installation part of the first transmission shaft 21 is avoided, and the damage of the installation part in a high-temperature furnace is further avoided.
In order to solve the problem that the driving parts of the sub-round table 23 are easily damaged, the composite rotary support 2 preferably further comprises a plurality of second driving shafts 24, and the plurality of second driving shafts 24 extend from the carburizing and quenching furnace 1 to the sides of the plurality of sub-round tables 23.
The plurality of second transmission shafts 24 and the plurality of sub-round tables 23 are in one-to-one correspondence to carry out meshing transmission; the plurality of second transmission shafts 24 are all driven by the same driving structure.
Since the rotation of the plurality of second transmission shafts 24 is the same, only one gear meshed with all the second transmission shafts 24 is needed for transmission, and the use of driving components can be saved.
In order to reduce the use of transmission components and to ensure opposite rotation directions of the main cone 22 and the sub cone 23, the drive structure preferably comprises a main cone gear 25 and two sub cone gears 26, the tooth surfaces of which sub cone gears 26 are arranged opposite each other.
One of the sub-bevel gears 26 is mounted on the first transmission shaft 21, the other sub-bevel gear 26 is rotatably mounted on the first transmission shaft 21 and is provided with a coupling ring 29 thereon, and the outer circumferential surface of the coupling ring 29 is in meshed transmission with the plurality of second transmission shafts 24.
The female bevel gear 25 is simultaneously meshed with the two sub bevel gears 26 to simultaneously drive the two sub bevel gears 26 to reversely rotate, and the female bevel gear 25 is connected with an output shaft of the motor.
When the rotation speeds of the master circular table 22 and the sub circular table 23 are the same, the sub circular table 23 is in the same rotation direction as the master circular table 22 during one rotation, and this results in superposition of a certain local movement speed of the sub circular table 23 at that time, and thus carburization unevenness is caused.
In this embodiment, the drive ring 29 is used to drive all the second transmission shafts 24 synchronously, and the female bevel gear 25 is used to drive the two sub bevel gears 26 to rotate reversely, so as to reduce the use of a driving motor and further reduce the cost of the device.
The above mentioned speeds of the sub-circular truncated cones 23 are superimposed, which results in a larger centrifugal force received by the sub-circular truncated cones 23, so that the sub-circular truncated cones 23 are easily separated.
In order to solve the problem that the sub-round table 23 is easy to separate, the sub-round table 23 is provided with a protrusion 27, and the protrusion 27 is used for being sleeved on the inner peripheral surface of the cylindrical gear blank 3.
In order to avoid the through hole 28 from closing the bottom end of the cylindrical gear blank 3, preferably, the sub-circular table 23 is provided with the through hole 28 along the central axis line thereof, and the diameter of the through hole 28 is greater than or equal to the inner diameter of the cylindrical gear blank 3.
In order to avoid the protrusion 27 causing carburization dead angle on the inner peripheral surface of the cylindrical gear blank 3, it is preferable that the protrusion 27 includes a power mechanism for providing power to the plurality of push rods 271, and the plurality of push rods 271 are adapted to abut on the inner peripheral surface of the cylindrical gear blank 3 to limit the cylindrical gear blank 3.
And the plurality of lift pins 271 can be periodically moved to avoid dead corners on the inner peripheral surface of the cylindrical gear blank 3 where carburizing gas cannot be contacted.
The ejector rod 271 can rotate circumferentially along the inner peripheral surface of the cylindrical gear blank 3, so that carburization dead angles caused by fixing the ejector rod 271 can be solved, and the ejector rod 271 in a moving state can also play a limiting role in preventing centrifugal force.
In order to avoid the separate driving of the push rods 271, preferably, a plurality of hinge rods 272 are uniformly distributed on the inner peripheral surface of the through hole 28, and the plurality of push rods 271 are rotatably mounted on the single hinge rod 272 in pairs; the hinge rod 272 is provided with an arc convex surface for enabling the ejector rod 271 to rotate along the radian of the inner peripheral surface of the cylindrical gear blank 3.
The opening and closing movement of the push rods 271 which are arranged in pairs replaces the circular movement of the push rods, so that the movement amplitude of the push rods is smaller, and the push rods are convenient to drive.
Preferably, the power mechanism includes a driving part 273, and a quadrangular movable frame 274, and one group of the plurality of push rods 271 is mounted on both sides of one end of the quadrangular movable frame 274, respectively, so that when the other end of the quadrangular movable frame 274 reciprocates along the axial direction of the through hole 28, the one group of the plurality of push rods 271 can switch between an opening motion and a closing motion.
The driving part 273 is used for providing power for one end of the quadrangular movable frame 274 away from the cylindrical gear blank 3.
The through holes 28 extend to the master circle table 22, a plurality of transmission discs 2731 are rotatably arranged below the master circle table 22, the transmission discs 2731 are in one-to-one correspondence with the through holes 28, and the transmission discs 2731 are in meshed transmission with the second transmission shaft 24.
A plurality of extrusion protrusions 2732 are arranged on the transmission disc 2731 along the circumferential direction of the transmission disc 2731, and the extrusion protrusions 2732 can extrude 2732 one end, far away from the cylindrical gear blank 3, of the quadrangular movable frame 274.
In the present application, the pressing protrusions 2732 on the driving plate 2731 periodically press the bottom ends of the quadrangular movable frames 274 by the rotation of the driving plate 2731, so that the top ends of the quadrangular movable frames 274 follow the movement to drive the opening and closing of the push rods 271.
To avoid separate driving rotations of the drive disk 2731, the drive disk 2731 is selectively engaged with the second drive shaft 24 to save on the cost of the device.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this application will occur to those skilled in the art, and are intended to be within the spirit and scope of the application.
Claims (10)
1. A carburizing and quenching heat treatment device for gears is characterized by comprising:
a carburizing and quenching furnace (1) for accommodating a plurality of cylindrical gear blanks (3);
a composite rotation support (2) penetrating through the bottom end of the carburizing and quenching furnace (1) for rotating the plurality of cylindrical gear blanks (3) with the central axis of the composite rotation support (2) as the center and simultaneously rotating a single cylindrical gear blank (3) with the central axis of the cylindrical gear blank (3) as the center;
a heating mechanism for heating the plurality of cylindrical gear blanks (3) to a preset temperature;
a first nozzle (4) which is arranged in the carburizing and quenching furnace (1) and is positioned at any side of the composite rotary support (2) so as to spray carburizing gas on the peripheral surfaces of the plurality of cylindrical gear blanks (3);
and the second nozzle (5) is arranged in the carburizing and quenching furnace (1) and is positioned above the composite rotary support (2) so as to spray carburizing gas on the outer peripheral surfaces of the cylindrical gear blanks (3).
2. The carburizing and quenching heat treatment device for gears according to claim 1, wherein,
the combined rotary supporting piece (2) comprises a first transmission shaft (21), a main round table (22) and a plurality of sub round tables (23), wherein the sub round tables (23) are uniformly and rotatably installed on the main round table (22) along the circumferential direction of the main round table (22), and the first transmission shaft (21) is outwards and inwards extended to the main round table (22) from the carburizing quenching furnace (1) so as to drive the main round table (22) to rotate.
3. A carburizing and quenching heat treatment device for gears according to claim 2, wherein,
the composite rotary support (2) further comprises a plurality of second transmission shafts (24), the plurality of second transmission shafts (24) extend outwards and inwards from the carburizing and quenching furnace (1) to the side edges of the plurality of sub-round tables (23), and the plurality of second transmission shafts (24) and the plurality of sub-round tables (23) are in one-to-one correspondence to carry out meshing transmission;
the plurality of second transmission shafts (24) are all driven by the same driving structure.
4. A carburizing and quenching heat treatment device for gears according to claim 3, wherein,
the driving structure comprises a female bevel gear (25) and two sub bevel gears (26), tooth surfaces of the two sub bevel gears (26) are oppositely arranged, one sub bevel gear (26) is installed on the first transmission shaft (21), the other sub bevel gear (26) is rotatably installed on the first transmission shaft (21) and provided with a linkage ring (29), and the peripheral surface of the linkage ring (29) is in meshed transmission with the plurality of second transmission shafts (24);
the female bevel gear (25) is simultaneously meshed with the two sub bevel gears (26) to simultaneously drive the two sub bevel gears (26) to reversely rotate, and the female bevel gear (25) is connected with an output shaft of a motor.
5. The carburizing and quenching heat treatment device for gears according to claim 4, wherein,
the sub round table (23) is provided with a bulge (27), and the bulge (27) is used for sleeving the inner peripheral surface of the cylindrical gear blank (3).
6. The carburizing and quenching heat treatment device for gears according to claim 5, wherein,
and a through hole (28) is formed in the sub circular truncated cone (23) along the central axis line, and the diameter of the through hole (28) is larger than or equal to the inner diameter of the cylindrical gear blank (3).
7. The carburizing and quenching heat treatment device for gears according to claim 6, wherein,
the bulge (27) comprises a power mechanism and a plurality of ejector rods (271), the ejector rods (271) are used for abutting against the inner peripheral surface of the cylindrical gear blank (3) so as to limit the cylindrical gear blank (3), and the power mechanism is used for providing power for the ejector rods (271);
and the plurality of carrier rods (271) are capable of moving periodically to avoid dead corners on the inner peripheral surface of the cylindrical gear blank (3) where carburizing gas cannot be contacted.
8. The carburizing and quenching heat treatment device for gears according to claim 7, wherein,
a plurality of hinging rods (272) are uniformly distributed on the inner peripheral surface of the through hole (28), and the plurality of ejector rods (271) are rotatably arranged on the hinging rods (272) in a group by group;
the hinge rod (272) is provided with an arc convex surface which is used for enabling the ejector rod (271) to rotate along the radian of the inner peripheral surface of the cylindrical gear blank (3).
9. The carburizing and quenching heat treatment device for gears according to claim 8, wherein,
the power mechanism comprises a transmission part (273) and a quadrilateral movable frame (274), wherein one group of ejector rods (271) is respectively arranged on two sides of one end of the quadrilateral movable frame (274), so that when the other end of the quadrilateral movable frame (274) reciprocates along the axial direction of the through hole (28), one group of ejector rods (271) can realize switching between opening and closing actions;
the transmission part (273) is used for providing power for one end of the quadrangular movable frame (274) far away from the cylindrical gear blank (3).
10. The carburizing and quenching heat treatment device of a gear according to claim 9, wherein the through hole (28) extends to the master circle table (22), a plurality of transmission discs (2731) are rotatably installed below the master circle table (22), the transmission discs (2731) are in one-to-one correspondence with the through hole (28), and the transmission discs (2731) are in meshed transmission with the second transmission shaft (24);
a plurality of extrusion protrusions (2732) are arranged on the transmission disc (2731) along the circumferential direction of the transmission disc, and the extrusion protrusions (2732) can extrude (2732) one end, far away from the cylindrical gear blank (3), of the quadrangular movable frame (274).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111349882A (en) * | 2020-04-30 | 2020-06-30 | 海盐联众紧固件有限公司 | Carburizing furnace for high-strength thrust rod locknut |
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| JPH10102229A (en) * | 1996-09-25 | 1998-04-21 | Nippon Koshuha Kogyo Kk | Method for carburizing cylindrical steel |
| JP2017008348A (en) * | 2015-06-18 | 2017-01-12 | トヨタ自動車株式会社 | Carburization apparatus |
| CN107385381A (en) * | 2017-08-22 | 2017-11-24 | 上海汽车变速器有限公司 | Improve the method for vacuum low-pressure carburization uniformity |
| CN111315913A (en) * | 2017-11-08 | 2020-06-19 | 株式会社电装 | Gas carburizing apparatus and gas carburizing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102229A (en) * | 1996-09-25 | 1998-04-21 | Nippon Koshuha Kogyo Kk | Method for carburizing cylindrical steel |
| JP2017008348A (en) * | 2015-06-18 | 2017-01-12 | トヨタ自動車株式会社 | Carburization apparatus |
| CN107385381A (en) * | 2017-08-22 | 2017-11-24 | 上海汽车变速器有限公司 | Improve the method for vacuum low-pressure carburization uniformity |
| CN111315913A (en) * | 2017-11-08 | 2020-06-19 | 株式会社电装 | Gas carburizing apparatus and gas carburizing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111349882A (en) * | 2020-04-30 | 2020-06-30 | 海盐联众紧固件有限公司 | Carburizing furnace for high-strength thrust rod locknut |
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