CN203320106U - Carburizing furnace for carburizing process of impactor piston - Google Patents
Carburizing furnace for carburizing process of impactor piston Download PDFInfo
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- CN203320106U CN203320106U CN2013202751881U CN201320275188U CN203320106U CN 203320106 U CN203320106 U CN 203320106U CN 2013202751881 U CN2013202751881 U CN 2013202751881U CN 201320275188 U CN201320275188 U CN 201320275188U CN 203320106 U CN203320106 U CN 203320106U
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- furnace
- charging basket
- carburizing
- windsheild
- wind shield
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Abstract
The utility model discloses a carburizing furnace for a carburizing process of an impactor piston. The carburizing furnace comprises a furnace tank arranged in a furnace body, a furnace lid arranged on the upper part of the furnace tank, a fan which is arranged under the furnace lid and connected with a motor, an exhaust pipe arranged on the furnace lid, a charging basket placed in the furnace tank, and a wind shield, wherein a pressure regulating valve and a pressure gauge which is used for measuring the pressure in the furnace are arranged on the exhaust pipe; the charging basket is of a cylinder type structure, and a barrier with vent holes is arranged at the bottom of the charging basket; the wind shield and the furnace lid are arranged on the charging basket in a separated manner, claws are arranged on the edge of the wind shield, a vent hole is formed in the center, the size of the vent hole of the wind shield corresponds to a negative pressure area formed by the fan, the outer diameter of the wind shield is matched with the outer diameters of the claws and the charging basket, and the wind shield is buckled on the topmost layer of the charging basket. The carburizing furnace is improved on a traditional pit type carburizing furnace, so that the carburizing speed of the traditional pit type carburizing furnace is high, the carburizing time is saved, and the quality of the impactor piston is improved.
Description
Technical field
The present invention relates to a kind of gas carbruizing furance field, relate in particular to a kind of cementing furnace for the impactor piston carburization process.
Background technology
Knocker is the rock drilling device of drill carriage, and the quality of its performance is determining the working efficiency of drill carriage, is the key part of whole bench drill car.And knocker performance quality and the length in the work-ing life performance that depends on piston, so the piston of knocker is the vital part of whole bench drill car.The carburizing quality of impactor piston has important effect to the quality of piston, thus a kind of cementing furnace that is exclusively used in the knocker carburization process of very necessary design.
The cementing furnace of traditional impactor piston carburization process adopts traditional cementing furnace, traditional pit gas carburizing furnace is the main carburizing equipment that last century six, the seventies was used, although have at present manyly as new installations such as continuous acieration furnace, multipurpose furnace, vacuum cementation furnaces, pit carburizing furnace still is widely applied in factory.It comprises temperature regulating device, with the body of heater of heating unit, be provided with retort in body of heater, bell is arranged at retort top, motor is installed above bell, the fan of motor below being positioned at bell is connected, during work, bell covers on retort and sealing, and fan rotates the effect that furnace atmosphere is forced the furnace atmosphere circulation of stirring of playing in retort.Be provided with the windsheild of hanging below bell below the fan of traditional pit gas carburizing furnace, the uniform circulation of furnace atmosphere is guaranteed by windsheild, the air-flow that fan blows out flows to surrounding retort inwall place along windsheild, make air-flow flow down to the retort bottom between retort and charging basket wall, and the fan center zone forms negative pressuren zone, the air-flow that arrives the retort bottom is returned along the retort center, can prevent that like this air-flow from directly blowing on the workpiece in charging basket and charging basket, cause furnace atmosphere have circulation less than place, or directly from charging basket top, return to circulation.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of cementing furnace for the impactor piston carburization process, carrying out improvement side to traditional pit carburizing furnace, thereby improve the carburizing speed of traditional pit carburizing furnace, save carburizing time, improve the impactor piston quality.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of cementing furnace for the impactor piston carburization process, be included in the retort that arranges in body of heater, retort top bell, be arranged on the fan be connected with motor below bell, be arranged on vapor pipe above bell, be positioned over charging basket, windsheild in retort, it is characterized in that: pressure regulator valve is installed above vapor pipe and measures the pressure warning unit of furnace pressure; Charging basket is and the corresponding core structure of inwall of the retort of pit carburizing furnace that the bottom of charging basket is the barrier with ventilation hole; Windsheild with bell, separate be arranged on charging basket above, the edge of windsheild is provided with claw, and center is with ventilation hole, and the size of the ventilation hole of windsheild is corresponding with the negative pressuren zone that fan forms, the external diameter of windsheild and claw coordinate with the external diameter of charging basket, and the windsheild button is placed on above the superiors' charging basket.
The barrier of described charging basket bottom is connected with the charging basket clearance fit; Be provided with the hook that the lifting charging basket is used on the cylindrical of charging basket.
Owing to having adopted technique scheme, the beneficial effects of the utility model are: after the present invention is transformed traditional pit carburizing furnace and frock in cementing furnace, in conjunction with practical situation, carburization process is adjusted again, carburizing speed is improved greatly, carburizing time shortens, as reached equally case depth 1.lmm, the required carburizing time of traditional method for carburizing is 517min, adopts method of the present invention only to need 340min.Therefore method of the present invention is saved carburizing time 34. 2% than traditional method, and production efficiency improves 34. 20%, directly economizes on electricity 34. 2%, penetration enhancer approximately 44.2%.
Windsheild is installed at above charging basket, increased the free air space of air-flow between fan and windsheild, because windsheild directly covers on charging basket, the air-flow that fan blows out can directly not enter between windsheild and charging basket, during carburizing, furnace atmosphere arrives retort inwall place and flows downward between charging basket outer wall and retort under the effect of rotary fan, when arriving the retort bottom, furnace gas changes direction, the breather hole, charging basket ventilating pit, the workpiece gap that see through base flow to the negative pressuren zone that fan forms below, circulation again under the effect of air-circulating fan.In working cycle, the air-flow blocked by windsheild, change flow direction, flows to negative pressuren zone.By rotary fan, charging basket wall and windsheild guide effect, realized the uniform circulation of furnace atmosphere.
The methyl alcohol that exhaust phase constantly splashes in burner hearth decomposes in stove, and the air-flow of uniform circulation can be transported to methanol decomposition atmosphere rapidly in stove each position and oxidizing atmosphere is discharged to burner hearth, therefore makes the exhaust process workpiece not produce oxidation.
Cementation process is divided into decomposition, absorption and three processes of diffusion of penetration enhancer.The penetration enhancer (kerosene, methyl alcohol) splashed in burner hearth in the carburizing stage resolves into rapidly reactive gas below the instillation hole, and stirred rapidly by fan, be transported to each position of retort with circulating current, only have circulating current unobstructed, just can not make the carburizing atmosphere stagnation be gathered in certain position and form carbon deposit; The air-flow of uniform circulation also helps the abundant decomposition of kerosene, and the increase of furnace pressure is conducive to separating out of active C, and active C to separate out be to consume CO, CH
4Process.CO, CH
4Minimizing be conducive to the cracking of kerosene, same, the kerosene cracking is more abundant, more is not easy to form carbon black.
The installation of charging basket windsheild makes in stove each regional gas stream cycle balance consistent, evenly carries active atoms of carbon on the one hand in stove workpiece everywhere, guarantees the adsorptive capacity of the active atoms of carbon on air film layer surface; On the other hand by the waste gas CO of workpiece surface air film layer
2, H
2, H
2O evenly takes away; According to langmuir's theory of adsorption---the furnace gas circulation has been accelerated in the increase of furnace pressure, improves the adsorptive capacity of the active C on air film layer surface; The increase of pressure simultaneously promotes breaking of middle air film layer, reduces the resistance of air film layer to active atoms of carbon, makes active C fully be adsorbed onto workpiece surface, has increased the probability that active C enters workpiece metal inside.The increase of the C quantity of adsorbing due to workpiece surface, improved the concentration of the active C of workpiece surface, thereby workpiece surface and inside workpiece carbon profile are increased; According to Fick's first law---velocity of diffusion is directly proportional to concentration gradient, and the increase of workpiece surface and inside workpiece carbon profile has promoted the diffusion of active C in workpiece; In the situation that temperature, material are certain, when increasing pressure, the dense degree of furnace gas increases, and the quantity of the C of collision workpiece surface increases, and the pressure that acts on workpiece surface increases, thereby has accelerated the velocity of diffusion of C in workpiece.
Claw on windsheild is in order to prevent that windsheild from moving in process is come out of the stove in shove charge, or by fan, is blown in cementation process.Hook is arranged on the cylindrical of charging basket, and not only convenient lifting, and the top and bottom that are conducive to charging basket coordinate can be by the overlapping placement of charging basket, increases charging basket stability and stopping property during carburizing in cementing furnace.Barrier and the charging basket of basket bottom are flexibly connected, and are convenient to change barrier.
The accompanying drawing explanation
Figure l is the structural representation of equipment of the present invention and frock and the circulation schematic diagram of gas stream in the stove;
Fig. 2 is the upward view of the windsheild in figure l.
Embodiment
In order to make those skilled in the art understand better the technical solution of the utility model; below in conjunction with accompanying drawing, the utility model is described in detail; the description of this part is only exemplary and explanatory, should any restriction not arranged to protection domain of the present utility model.
As scheme as shown in l, Fig. 2, a kind of cementing furnace for the impactor piston carburization process, comprise body of heater and the heating unit arranged on inboard wall of furnace body, also comprises power distribution cabinet equitemperature control device; Be provided with retort 10 in body of heater, on the top of retort 10, bell 4 arranged, motor l is installed on bell 4, the fan 2 be connected with motor l is installed below bell 4; Vapor pipe and the instillator that splashes into carburizing agent also are installed on bell 4, pressure regulator valve 3 is installed on vapor pipe, also be provided with the pressure tap 5 of Bonding pressure meter on vapor pipe below pressure regulator valve 3, pressure is herein counted U-shaped water manometer, is used for showing the pressure in retort 10.
Be placed with base 11 at retort 10 inner bottom parts, pile up three layered material baskets 7 on base 11, in each charging basket 7, hold the impactor piston that needs carburizing.Charging basket 7 is cylindric, and the bottom of each charging basket 7 is provided with barrier 9, and barrier 9 is flexibly connected with the charging basket wall, on barrier 9, is provided with ventilation hole.Be placed with windsheild 6 at the top of the superiors' charging basket 7, the center of windsheild 6 is with ventilation hole 13, and edge is provided with claw 14, and the external diameter of windsheild 6 and claw 14 coordinate with the external diameter of charging basket 7, and the windsheild button is placed on the charging basket of the superiors; The hook of lifting charging basket 7 use is set on the outer ancient piece of jade, round, flat and with a hole in its centre of charging basket 7.
The utility model is optimization design under the prerequisite that meets the GB requirement, and improves performance, reduces material usage, improves conductive effect; Reduce costs thereby reach the raising performance, make product there is the higher market competitiveness.
It should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make the process, method, article or the equipment that comprise a series of key elements not only comprise which key element, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.In the situation that not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises key element and also have other identical element.
Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof.The above is only preferred implementation of the present utility model, should be understood that, finiteness due to literal expression, and objectively there is unlimited concrete structure, for those skilled in the art, under the prerequisite that does not break away from the utility model principle, can also make some improvement, retouching or variation, also above-mentioned technical characterictic can be combined by rights; These improve retouching, change or combination, or without improving, the design of utility model and technical scheme are directly applied to other occasion, all should be considered as protection domain of the present utility model.
Claims (2)
1. the cementing furnace for the impactor piston carburization process, be included in the retort that arranges in body of heater, retort top bell, be arranged on the fan be connected with motor below bell, be arranged on vapor pipe above bell, be positioned over charging basket, windsheild in retort, it is characterized in that: pressure regulator valve is installed above vapor pipe and measures the pressure warning unit of furnace pressure; Charging basket is core structure, and the bottom of charging basket is the barrier with ventilation hole; Windsheild with bell, separate be arranged on charging basket above, the edge of windsheild is provided with claw, and center is with ventilation hole, and the size of the ventilation hole of windsheild is corresponding with the negative pressuren zone that fan forms, the external diameter of windsheild and claw coordinate with the external diameter of charging basket, and the windsheild button is placed on above the superiors' charging basket.
2. according to the described a kind of cementing furnace for the impactor piston carburization process of claim l, it is characterized in that: the barrier of described charging basket bottom is connected with the charging basket clearance fit; Be provided with the hook that the lifting charging basket is used on the cylindrical of charging basket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202751881U CN203320106U (en) | 2013-05-20 | 2013-05-20 | Carburizing furnace for carburizing process of impactor piston |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202751881U CN203320106U (en) | 2013-05-20 | 2013-05-20 | Carburizing furnace for carburizing process of impactor piston |
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| Publication Number | Publication Date |
|---|---|
| CN203320106U true CN203320106U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202751881U Expired - Lifetime CN203320106U (en) | 2013-05-20 | 2013-05-20 | Carburizing furnace for carburizing process of impactor piston |
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| CN (1) | CN203320106U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113862608A (en) * | 2021-09-26 | 2021-12-31 | 南京高速齿轮制造有限公司 | Carburizing medium injection apparatus |
-
2013
- 2013-05-20 CN CN2013202751881U patent/CN203320106U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113862608A (en) * | 2021-09-26 | 2021-12-31 | 南京高速齿轮制造有限公司 | Carburizing medium injection apparatus |
| CN113862608B (en) * | 2021-09-26 | 2024-03-01 | 南京高速齿轮制造有限公司 | Carburizing medium injection device |
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| GR01 | Patent grant | ||
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Granted publication date: 20131204 |
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| CX01 | Expiry of patent term |