CN211595768U - Device for improving thickness uniformity of carburized layer of cavity workpiece - Google Patents
Device for improving thickness uniformity of carburized layer of cavity workpiece Download PDFInfo
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- CN211595768U CN211595768U CN201922413307.5U CN201922413307U CN211595768U CN 211595768 U CN211595768 U CN 211595768U CN 201922413307 U CN201922413307 U CN 201922413307U CN 211595768 U CN211595768 U CN 211595768U
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Abstract
The utility model relates to a device for improving the thickness uniformity of a carburized layer of a cavity workpiece, which belongs to the technical field of chemical heat treatment of tantalum and tantalum alloy and comprises a supporting system, a heat insulation system, an air source system and an air exhaust system; the heat insulation system is respectively connected with the air source system and the air pumping system; the supporting system comprises a vacuum carburizing furnace, a supporting frame and a workbench, and the vacuum carburizing furnace and the workbench are connected through a heat insulation system; the heat insulation system is a heat insulation layer; the air source system and the air pumping system are both connected with the heat insulation layer; the support frame is placed on the workstation, and the workstation is placed on the guide rail. The utility model discloses a device has improved complicated cavity structure work piece and has taken the different position carburization layer homogeneity of blind hole work piece, especially improves the work piece inner chamber and causes the thin phenomenon in layer of carburization layer because gas flow is insufficient, has improved the performance and the service life-span of carburization back work piece.
Description
Technical Field
The utility model relates to an improve device of cavity work piece carburization layer thickness homogeneity, concretely relates to improve device that has cavity or blind hole tantalum system work piece carburization layer homogeneity belongs to tantalum and tantalum alloy chemical heat treatment technical field.
Background
The tantalum and tantalum alloy products have excellent high temperature resistance and thermal shock resistance, and can be used as various appliances required by a high-temperature chemical process, such as a smelting mould, a crucible, a stirring rod and the like. For molten metal which is corrosive or has good tantalum wetting performance, the molten metal is usually adhered to the surface of a tantalum container in a chemical treatment process, the crystal boundary of the container material is corroded in high-temperature long-time contact, and the molten metal permeates along the crystal boundary, so that the container becomes brittle and cracks, and in severe cases, the container is cracked, so that the container is scrapped, and meanwhile, the material is polluted.
At present, a tantalum container is subjected to surface carburization through vacuum carburization heat treatment, a carbide surface layer with barrier property is formed on the surface of a workpiece, the wettability of the workpiece with target metal can be reduced, the workpiece has thermal shock resistance and high-temperature corrosion resistance of liquid metal, and the container material subjected to the carburization treatment can be recycled for multiple cycles.
However, in the carburizing process, for a workpiece with a complex cavity structure or a blind hole, in the vacuum carburizing process, due to the fact that the distribution of the air inlets in the vacuum carburizing furnace is uneven, the outer wall of the workpiece blocks gas, the fluidity of the gas in the cavity is poor, the conditions that the carburized layer thickness of the outer surface of the workpiece is uneven and the carburized layer thickness of the inner surface and the outer surface of the workpiece is uneven often occur, and the service performance under the actual working condition is reduced.
Therefore, the device for improving the thickness uniformity of the carburized layer of the cavity workpiece is provided, the flowability of internal gas is improved, and the problem of non-uniformity of the internal and external carburized layers of the workpiece in the carburization process is solved by combining the special position arrangement of the complex workpiece, so that the technical problem which needs to be solved urgently in the technical field is solved.
Disclosure of Invention
One of the purposes of the utility model is to provide an improve device of cavity work piece carburization layer thickness homogeneity, improve the mobility of inside gas to the special position who combines complicated work piece is put, solves the inhomogeneous problem of inside and outside carburization layer of carburization process work piece.
The above object of the utility model is achieved through the following technical scheme:
an apparatus for improving the uniformity of the thickness of a carburized layer of a hollow workpiece, comprising: the system comprises a supporting system, a heat insulation system, an air source system and an air pumping system; the heat insulation system is respectively connected with the air source system and the air pumping system; the supporting system comprises a vacuum carburizing furnace, a supporting frame and a workbench, and the vacuum carburizing furnace and the workbench are connected through a heat insulation system; the heat insulation system is a heat insulation layer; the air source system and the air pumping system are both connected with the heat insulation layer; the support frame is placed on the workstation, and the workstation is placed on the guide rail.
Preferably, the support frame is a V-belt support frame.
Preferably, the middle part of the triangular belt support frame is provided with an arc-shaped groove so as to play a role in fixing a workpiece.
Preferably, the heat insulation layer is positioned on the outermost layer inside the vacuum carburizing furnace.
Preferably, the heat insulation layer is composed of a plurality of layers (2-6 layers, and more preferably 3 layers) of heat insulation materials such as graphite felt, and the heat insulation layer plays a role in protecting the outer shell and insulating internal heat.
Preferably, the air source system comprises an air supply pipeline, a branch air supply pipeline and a detachable extending air supply pipeline.
Preferably, the air supply system comprises four air supply pipelines which are arranged up, down, left and right.
Preferably, the air source system comprises an upper detachably extending air inlet pipeline, a left detachably extending air inlet pipeline and a right detachably extending air inlet pipeline.
Preferably, the detachable extension air inlet pipe is provided with a plurality of branch air inlet pipes.
Preferably, the air supply system further comprises an independent air supply pipeline, and the flow rate can be controlled independently.
Preferably, the number of the branch gas inlet pipelines is 120, the branch gas inlet pipelines are uniformly distributed around the heat insulation layer, and external gas enters the vacuum carburizing furnace through the gas inlet pipelines and uniformly enters each part in the cavity of the vacuum carburizing furnace through nozzles connected with the 120 branch gas inlet pipelines.
Preferably, the detachable extension gas inlet pipeline directly extends into the workpiece, and the end parts of the detachable extension gas inlet pipeline are respectively provided with a plurality of nozzles, so that gas can be uniformly sprayed out, and the phenomenon that the carbon concentration at one position is too high is avoided.
Preferably, the air exhaust system is an air exhaust pipeline which is arranged on one side of the heat insulation layer, the outside of the air exhaust system is directly communicated with the vacuum pump, the other end of the air exhaust pipeline is connected with the detachable extending air inlet pipeline, the inside of the air exhaust pipeline is close to the inner cavity of the workpiece, and the air circulation is improved by increasing the directional flow of air.
Preferably, the workbench is made of graphite, a plurality of circular holes with equal diameters are formed in different positions on the surface of the workbench, and gas entering from the lower gas inlet pipeline enters the vacuum carburizing furnace cavity and the surface of the workpiece through the circular holes.
Preferably, the table has 5 to 40 circular holes of equal diameter, and more preferably, 26 circular holes of equal diameter.
Preferably, the mouths of the branch inlet duct and the detachable mobile extension inlet duct are both provided with graphite plugs.
Preferably, the upper end of the detachable mobile extension air inlet duct mouth is threaded and connected with the top through threads.
Preferably, the opening of the air exhaust pipeline is provided with a heat insulation baffle, and when the air exhaust opening is not used, the heat insulation baffle is closed by a graphite plug, so that the radiation heat transfer through the opening of the air exhaust pipeline is reduced.
Preferably, the outside of the air exhaust pipeline is directly communicated with a vacuum pump port, so that the air can be directionally exhausted from the air exhaust pipeline.
Another objective of the present invention is to provide a method for improving the uniformity of the carburized layer thickness of a cavity workpiece, which improves the flowability of the internal gas and is placed in combination with the special position of the complex workpiece to solve the problem of non-uniformity of the internal and external carburized layers of the workpiece during the carburization process.
The above object of the utility model is achieved through the following technical scheme:
a method for improving the uniformity of the thickness of a carburized layer of a cavity workpiece comprises the following steps:
(1) the carburizing gas is connected with an air source system through a pipeline, enters the vacuum carburizing furnace through the air source system, and contacts the surface of the workpiece through flowing;
(2) directly enters a cavity in the workpiece through a detachable movable type extending air inlet pipeline;
(3) the opening of the air pumping system can ensure that the internal air can be pumped out quickly while being filled, so that the internal air can keep flowing and is always fresh air.
Preferably, when the workpiece is a workpiece with a complex cavity structure, the air valve of the independent air supply pipeline is opened, and the air flow is the same as that of the other 4 paths of air flow.
Preferably, when the workpiece is a crucible workpiece with a blind hole, the detachable movable type extending air inlet pipeline on the left side and the upper part is closed, the air valve of the detachable movable type extending air inlet pipeline on the right side is opened, and the air flow rate of the independent air inlet pipeline is set to be larger than that of the other 4 paths of air.
Preferably, a plurality of circular holes with equal diameters are arranged at different positions on the surface of the workbench, so that gas entering from the lower gas inlet pipeline enters the vacuum carburizing furnace cavity and the surface of the workpiece through the circular holes.
Preferably, the support frame is graphite V-belt groove support frame, can fix the work piece, prevents to control the skew.
Has the advantages that:
(1) the utility model is suitable for a complex workpiece carburizing furnace with a complex cavity structure and blind holes, and can realize the carburizing uniformity of different positions of a large workpiece by uniformly arranging undifferentiated air inlet pipelines (nozzles) at the upper, lower, left and right sides;
(2) the movable extending air inlet pipeline and the air exhaust pipeline at the specific position are arranged, so that air can enter the inner cavity more fully, the flow difference of the air inlet pipeline is changed, the flowability of the air in the inner cavity is increased, the uniform carburized layer generated by carburization at different positions outside can be realized, and the thickness and the uniformity of the carburized layer at the inner cavity part are obviously improved;
(3) the graphite triangular belt groove support frame is arranged, so that a workpiece can be fixed, left and right deviation is prevented, the workpiece is in line contact with the bottom, the shielding area of the lower surface of the workpiece is reduced, and the carburizing uniformity is improved;
(4) through carrying out specific position to having complicated cavity structure work piece and putting, gaseous more even and the work piece internal and external surface contact, increase the mobility of inner chamber gas simultaneously, can improve the internal and external surface carburization homogeneity.
The invention is further illustrated by the accompanying drawings and the detailed description, which are not meant to limit the scope of the invention.
Drawings
Fig. 1 is the structural schematic diagram of the device for improving the uniformity of the thickness of the carburized layer of the cavity workpiece.
Fig. 2 is the utility model provides high device embodiment 1 of cavity work piece carburized layer thickness homogeneity bottom penetrating, upper portion have the circular tubulose work piece of through-hole put and extend the inlet duct arrange the sketch map.
Fig. 3 is the utility model provides the arrangement sketch map of putting and extending inlet duct of taking blind hole crucible work piece in the device embodiment 2 of improvement cavity work piece carburized layer thickness homogeneity.
Fig. 4 is the utility model discloses improve porous workstation's in device of cavity work piece carburized layer thickness homogeneity plan view.
Fig. 5 is the utility model provides the high structure schematic diagram of graphite V belt recess support frame in the device of cavity work piece carburization layer thickness homogeneity.
Names of main parts:
101 vacuum carburizing furnace 102 porous worktable
103 graphite triangular support frame 201 graphite felt heat insulation layer with groove
301 main air feed pipe 302 branch air feed pipe
303 independent air supply pipe 304 detachable mobile extension air inlet pipe
401 pumping pipeline 5 workpiece
501 workpiece 502 workpiece with complex cavity structure and crucible workpiece with blind hole
Detailed Description
Example 1
As shown in fig. 1, it is a schematic structural diagram of the apparatus for improving the uniformity of the thickness of the carburized layer of the cavity workpiece according to the present invention; as shown in fig. 2, it is a schematic diagram of the arrangement of the circular tubular workpiece with through holes on the bottom and through holes on the upper part and the arrangement of the extended air inlet pipeline in the device for improving the thickness uniformity of the carburized layer of the hollow workpiece according to the present invention; as shown in fig. 3, it is a schematic diagram of the arrangement of the blind hole crucible workpiece and the extended air inlet pipeline in embodiment 2 of the apparatus for improving the uniformity of the carburized layer thickness of the cavity workpiece according to the present invention; as shown in fig. 4, it is a top view of a plurality of work tables in the apparatus for improving the uniformity of the thickness of the carburized layer of the cavity workpiece according to the present invention; as shown in fig. 5, it is a schematic structural diagram of the graphite triangular grooved support frame in the device for improving the uniformity of the thickness of the carburized layer of the cavity workpiece according to the present invention; 101 is a vacuum carburizing furnace, 102 is a porous workbench, 103 is a graphite triangular groove support frame, 201 is a graphite felt heat-insulating layer, 301 is a main gas supply pipeline, 302 is a branch gas supply pipeline, 303 is an independent gas supply pipeline, 304 is a detachable movable extension gas supply pipeline, 401 is a gas extraction pipeline, 5 is a workpiece, 501 is a workpiece with a complex cavity structure, and 502 is a crucible workpiece with a blind hole;
the utility model provides a device for improving cavity work piece carburization layer thickness homogeneity, including vacuum carburizing furnace 101, porous work platform 102, graphite V belt groove support frame 103, graphite felt insulating layer 201, main air supply pipeline 301, branch air supply pipeline 302, independent air supply pipeline 303, detachable movable extension air supply pipeline 304, air exhaust pipeline 401, and work piece 5; in this embodiment, the workpiece 501 with a complex cavity structure is a circular tubular workpiece with a through-hole on the top and a through-hole on the bottom, as shown in fig. 2, which is a schematic layout diagram of the circular tubular workpiece with a through-hole on the top and a placement of an extended air inlet pipe in embodiment 1 of the apparatus for improving the thickness uniformity of a carburized layer of a cavity workpiece; the porous workbench 102 is lapped on a graphite guide rail (or a metal guide rail), the graphite triangular groove support frame 103 is placed on two sides of the porous workbench 102 in parallel, the workpiece 501 with the complex cavity structure is placed on the graphite triangular groove support frame 103, and the lower part of the workpiece 501 with the complex cavity structure is contacted with the graphite triangular groove support frame 103, so that firstly, the shielding of the support on the workpiece is reduced, the workpiece can be stabilized by the groove, and the left-right sliding is avoided;
the graphite triangular grooved support frames 103 are made of isostatic high-purity graphite and internally provided with grooves, the porous workbench 102 is arranged on a graphite guide rail, and the two graphite triangular grooved support frames 103 are arranged on the porous workbench 102 in parallel;
the graphite felt heat insulation layer 201 is three layers, is positioned on the outermost layer in the vacuum carburizing furnace 101 and is composed of three layers of graphite felt heat insulation materials, and plays a role in protecting the vacuum carburizing furnace 101 and insulating internal heat;
a main air supply pipeline 301 is arranged around the graphite felt heat insulation layer 201, wherein the main air supply pipeline 301 at the upper part is connected with 12 branch air inlet pipelines 302 and a detachable movable extension air inlet pipeline 304, and the main air supply pipeline at the lower part is connected with 13 branch air inlet pipelines 302; the main air supply pipeline 301 on the left side is connected with 6 branch air inlet pipelines 302, and the left side is provided with a detachable movable extension air inlet pipeline 304; the main air supply pipeline 301 on the right side is connected with 6 branch air inlet pipelines 302, and the right side is provided with a detachable movable extension air inlet pipeline 304; the left side is also provided with an independent air supply pipeline 303, and the right side is provided with an air exhaust pipeline 401;
the axial pipe orifice of the workpiece 501 with the complex cavity structure is placed towards the left and right, the opening of the radial through hole is placed upwards, the detachable movable extending air inlet pipelines 304 on the left and right sides and the upper part respectively extend into the through pipeline and the upper part semi-blind hole of the workpiece 501 with the complex cavity structure, the air valve of the independent air inlet pipeline 303 is opened, the air flow is the same as that of other 4 paths of air flow, the air flow of the inner cavity is increased, more contact carburizing gas can be generated in the inner cavity, the inner cavity of the workpiece is more fully reacted with the gas, the air exhaust pipeline 401 is over against the pipe orifice on the right side, and the position of the air exhaust;
when the vacuum carburizing furnace is in work, carburizing gas is connected with a main gas supply pipeline 301 through a pipeline, enters the vacuum carburizing furnace 101 through a branch gas supply pipeline 302 and an independent gas supply pipeline 303, the gas entering through the branch gas supply pipeline 302 is contacted with the surface of a workpiece 501 with a complex cavity structure through flowing, the gas entering through a detachable movable extension gas supply pipeline 304 fully flows in a lower through pipeline and an upper through hole and directly enters the cavity in the workpiece, the internal gas can be pumped out quickly when the gas exhaust pipeline 401 is opened, the internal gas can be kept flowing and is always fresh gas, and the gas can be uniformly introduced through a nozzle, and all the positions of the upper part, the lower part, the left part and the right part of the exterior of the workpiece 501 with the complex cavity structure can be contacted with the gas; the detachable movable type extension gas inlet pipeline 304 directly enters the inner cavity to ensure the sufficient supply of the internal gas, and meanwhile, the plurality of nozzles uniformly arranged on the branch gas inlet pipeline 302 ensure the uniform contact of the gas in the inner cavity and the workpiece, so that the reaction is more sufficient;
FIG. 4 is a top view of a multi-hole worktable in the apparatus for improving the uniformity of the thickness of the carburized layer of the cavity workpiece according to the present invention; the porous worktable 102 is made of isostatic high-purity graphite and is internally provided with 26 circular holes with equal diameters;
as shown in fig. 5, it is a schematic structural diagram of the graphite triangular grooved support frame in the device for improving the uniformity of the thickness of the carburized layer of the cavity workpiece according to the present invention; the graphite triangular groove support frame 103 reduces the contact area between the bottom of the workpiece and the porous workbench 102, reduces the shielding of the porous workbench 102 on the workpiece, enables gas to flow sufficiently at the bottom, ensures the stability of the workpiece in the feeding and taking-out processes, and avoids sliding left and right;
the branch air inlet pipe 302 and the detachable movable extension air inlet pipe 303 are provided with graphite plugs at the mouth parts, the graphite plugs are detachable, the upper end part of the detachable movable extension air inlet pipe 303 is provided with threads, and the detachable movable extension air inlet pipe 303 is connected with the top part through the threads;
in order to reduce the radiation heat transfer through the air exhaust pipeline 401, a heat insulation baffle plate can be arranged at the corresponding position of the air exhaust pipeline 401, and when the air exhaust pipeline 401 is not used, the heat insulation baffle plate is closed by a graphite plug;
the main gas supply pipeline is connected with an external gas cylinder, in order to ensure high vacuum in the vacuum carburizing furnace, the main gas supply pipeline is divided into a plurality of paths of gas supply, each path of gas supply can also be divided into 10-30 branch gas supply pipelines, and the nozzles are uniformly distributed on the four walls in the graphite felt heat insulation layer.
Has the advantages that: when a workpiece 501 with a complex cavity structure is carburized by a common carburizing furnace, a carburized layer at the bottom of the workpiece is usually thinner due to shielding, and the thickness of the carburized layer on the inner wall of the cavity is about 50 percent lower than that of the carburized layer on the outer wall of the cavity; compared with a common carburizing furnace, the difference between the thickness of the carburized layer on the outer wall of the workpiece is less than or equal to 15 percent, the difference between the thickness of the carburized layer on the inner wall of the cavity and the thickness of the carburized layer on the outer wall is less than or equal to 20 percent, and the thickness uniformity of the carburized layers on the inner wall and the outer wall is obviously improved by rearranging the gas source and placing the workpiece at a special position under the same process.
Example 2
The same as example 1, except that: a workpiece 501 with a complex cavity structure is replaced by a crucible workpiece 502 with a blind hole;
as shown in fig. 3, it is a schematic diagram of the arrangement of the blind hole crucible workpiece and the extended air inlet pipeline in embodiment 2 of the apparatus for improving the uniformity of the carburized layer thickness of the cavity workpiece according to the present invention; the opening of the crucible workpiece 502 with the blind hole faces the positions of the main air supply pipeline 301 and the air exhaust pipeline 401 on the right side, the detachable movable type extending air supply pipeline 304 on the left side and the upper part is closed, the air valve of the detachable movable type extending air supply pipeline 304 on the right side is opened, 20 nozzles are arranged on the detachable movable type extending air supply pipeline 304 on the right side, the air flow setting of the independent air supply pipeline 303 is larger than that of other 4 paths of air flow, the air exhaust pipeline 401 is right opposite to the opening of the crucible, and the position of the air exhaust pipeline is kept to be connected with.
When the vacuum carburizing furnace works, carburizing gas is connected with a main gas supply pipeline 301 through a pipeline, enters the inside of the vacuum carburizing furnace through a branch gas supply pipeline 302 and a right detachable movable extension gas supply pipeline 304, the gas entering through the branch gas supply pipeline 302 contacts with the surface of a workpiece through flowing, the gas entering through the detachable movable extension gas supply pipeline 304 directly enters a cavity in the workpiece, the gas flow at the detachable movable extension gas supply pipeline 304 is larger than the gas flow at the branch gas supply pipeline 302, the flow rate of the gas in a blind hole is larger than that of the external gas, the internal gas can be rapidly pumped out while being filled by opening a gas pumping pipeline 401, the internal gas keeps flowing and is always fresh gas, and the internal gas can be uniformly introduced through a nozzle and can be contacted with the gas at each position of the upper part, the lower part, the left part; the movable type that can dismantle on the right side extends admission line 304 and directly gets into the inner chamber, ensures the abundant supply of inside gas, and the tip that can dismantle movable type and extend admission line 304 sets up a plurality of (20) nozzles again, guarantees gaseous even blowout, and gaseous fast flow makes inside inner chamber gas and work piece contact complete simultaneously, and the reaction is more abundant.
Has the advantages that: under the same process condition, by improving the position of an air source and changing the arrangement direction of the workpiece, compared with a common carburizing furnace, the bottom of the workpiece reduces the contact area with a support frame, the ventilation of a lower workbench is increased, the thickness difference of the carburized layer on the outer wall of the workpiece is less than or equal to 15%, the thickness difference of the carburized layer on the inner wall of a cavity and the carburized layer on the outer wall of the workpiece is less than or equal to 20%, and the thickness uniformity of the carburized layers on the inner.
Through adopting the utility model discloses, under the same condition, improved the inside and outside carburization quality and the performance of work piece, the life-span has also obtained the improvement.
In the device of the utility model, the workpiece can be divided into a tubular transparent part, a crucible and other parts containing blind holes and semi-blind holes according to the shape, for the tubular transparent part, the inner cavity is axially arranged in the direction of air vents at the left and right sides, and the extending air inlet pipeline is arranged in the inner cavity, so that gas can fully enter the inner cavity, the inner cavity with an opening position in the radial direction is upwards arranged in the direction of the upper air inlet pipeline, and the upper extending air inlet pipeline is arranged in the inner cavity, so that the inner and outer inner cavities are uniformly contacted with the gas on the outer surface; for the crucible type workpiece with the blind hole, the opening direction of the workpiece points to the right, the extending gas inlet pipeline extends to the top, the flow rate is larger than that of the external gas inlet pipeline, and the right directional gas exhaust pipeline is opened simultaneously, so that the gas in the inner cavity flows and is updated to be larger than the outside, and the inside is more fully contacted with the active gas.
The utility model discloses the work piece to different shapes carries out specific arranging and puts to air supply and work piece in the vacuum carburizing furnace to utilize air exhaust system to improve the gas flow nature in the furnace chamber, improve the work piece bottom sprag frame simultaneously, improve complicated cavity structure work piece and take the different position carburization layer homogeneity of blind hole work piece, especially improve the work piece inner chamber because the gas flow is insufficient and cause the phenomenon that the carburization layer is thinner, improved the performance and the in service life-span of work piece after the carburization.
The technical scheme of the utility model side relate to the arrangement and application method of vacuum carburizing stove outside inlet port, the arrangement of the inside gas outlet of vacuum carburizing stove, several aspects such as the design and the use of work piece putting method, aspirating hole, admission pressure distribution, the utility model relates to a cavity structure work piece includes that the cavity link up parts and crucible etc. contain the blind hole work piece. The position and the flow of the movable extending air inlet pipeline and the movable extending air exhaust pipeline are properly adjusted according to the shape and the size of the workpiece, and the uniformity of the internal and external surface carburization of the workpiece is improved by improving the activity and the fluidity of the gas in the vacuum carburizing furnace. The bottom graphite triangular belt groove support frame can be used for placing workpieces with any shapes at the bottom and can be stably fixed. The porous workbench not only plays a supporting role, but also enables gas entering from a lower gas source to uniformly enter the vacuum carburizing furnace through the circular hole of the workbench. The utility model discloses the work piece to different shapes carries out specific arranging and puts to air supply and work piece in the vacuum carburizing furnace to utilize air exhaust system to improve the gas flow nature in the furnace chamber, improve the work piece bottom sprag frame simultaneously, improve complicated cavity structure work piece and take the different position carburization layer homogeneity of blind hole work piece, especially improve the work piece inner chamber because the gas flow is insufficient and cause the phenomenon that the carburization layer is thinner, improved the performance and the in service life-span of work piece after the carburization.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the above embodiments have described the present invention in detail, those skilled in the art should understand that: the invention can be modified or replaced by equivalent means, and any modification and partial replacement without departing from the spirit and scope of the invention should be covered by the claims of the invention.
Claims (8)
1. The utility model provides an improve device of cavity work piece carburized layer thickness homogeneity which characterized in that: comprises a supporting system, a heat insulation system, an air source system and an air pumping system; the heat insulation system is respectively connected with the air source system and the air pumping system; the supporting system comprises a vacuum carburizing furnace, a supporting frame and a workbench, and the vacuum carburizing furnace and the workbench are connected through a heat insulation system; the heat insulation system is a heat insulation layer; the air source system and the air pumping system are both connected with the heat insulation layer; the support frame is placed on the workstation, and the workstation is placed on the guide rail.
2. The apparatus of claim 1 for improving the uniformity of the carburized layer thickness of a hollow workpiece, comprising: the support frame is a triangular belt support frame, and the middle part of the triangular belt support frame is provided with an arc-shaped groove.
3. The apparatus for improving the uniformity of the carburized layer thickness of hollow workpieces as claimed in claim 2, wherein: the heat insulation layer is composed of 2-6 layers of graphite felt heat insulation materials.
4. The apparatus for improving the uniformity of the carburized layer thickness of hollow workpieces as claimed in claim 3, wherein: the air supply system comprises air supply pipelines, branch air inlet pipelines and detachable extension air inlet pipelines, the air supply pipelines are four air supply pipelines which are arranged from top to bottom and from left to right, the detachable extension air inlet pipelines comprise three detachable extension air inlet pipelines, the branch air inlet pipelines are 120, and the air supply pipelines are uniformly distributed around the heat insulation layer.
5. The apparatus for improving the uniformity of the carburized layer thickness of hollow workpieces as claimed in claim 4, wherein: the air supply system also includes an independent air delivery conduit.
6. The apparatus for improving the uniformity of the carburized layer thickness of hollow workpieces as claimed in claim 5, wherein: the detachable extension air inlet pipeline directly extends into the workpiece, and the end part of the detachable extension air inlet pipeline is respectively provided with a plurality of nozzles.
7. The apparatus of claim 6, wherein the apparatus further comprises: the air exhaust system is an air exhaust pipeline, is arranged on one side of the heat insulation layer, is directly communicated with the vacuum pump outside, and the other end of the air exhaust pipeline is connected with the detachable extending air inlet pipeline.
8. The apparatus of claim 7 for improving the uniformity of the carburized layer thickness of a hollow workpiece, comprising: and a plurality of circular holes with equal diameters are arranged at different positions on the surface of the workbench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922413307.5U CN211595768U (en) | 2019-12-27 | 2019-12-27 | Device for improving thickness uniformity of carburized layer of cavity workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922413307.5U CN211595768U (en) | 2019-12-27 | 2019-12-27 | Device for improving thickness uniformity of carburized layer of cavity workpiece |
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| Publication Number | Publication Date |
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| CN211595768U true CN211595768U (en) | 2020-09-29 |
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| CN201922413307.5U Active CN211595768U (en) | 2019-12-27 | 2019-12-27 | Device for improving thickness uniformity of carburized layer of cavity workpiece |
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