CN2295764Y - Continuous rare earth accelarator feeding unit of air status controlling carburizing apparatus - Google Patents

Abstract

The utility model relates to a continuous air controlling device for adding rare earth energizer in a carburizing furnace, and rare earth can be added in the original technology on unchanged condition by using the device. The utility model is mainly composed of a material storing box, a material receiving machine, a delivery pipe, and an anchor gate, wherein, the material storing box and the material receiving machine are designed to form an entire body, and the receiving machine uses a paternoster type; a material receiving bucket is installed on a transmission chain, and chains can be rotated in a circle to take out a grain of solid rare earth energizer under the drive of a chainwheel of the transmission chain. The utility model has the advantages of simple structure, and convenient operation, and an existing continuous carburizing furnace is provided with low temperature, quick carburization, and property of energy-saving. The application foreground is good.

Description

Continous way controlled atmosphere cementing furnace rare-earth energizer adds people's device

The utility model relates to a kind of continous way controlled atmosphere cementing furnace rare-earth energizer adding apparatus.

The utility model is in the relevant RE co-permeating technology series of contriver patent of invention (1. " solid rare earth thermo-chemical treatment energizer ", the patent No.: ZL88104208.8; 2. " process of low temperature and high concentration gaseous carburizing of rare-earth elements ", publication number: CN1061443A; 3. " instillation formula re carburizing computer control device ", the patent No.; 94205831.3; 4. " a kind of controlled atmosphere is used the re carburizing stove more ", the patent No.: ZL95201764.4) on the basis, the rare earth adding device that designs at continous way controlled atmosphere cementing furnace (also claiming through cementing furnace) use this specific question of rare-earth energizer.By contriver's patent " solid rare earth thermo-chemical treatment energizer ", can provide the rare-earth energizer of two kinds of series: a kind of another then is solid outward for liquid.The adding method and apparatus of liquid rare earth energizer has a detailed description in " a kind of controlled atmosphere is used the re carburizing stove more " patented technology, and it is applicable to the continous way cementing furnace fully.The automobile that has scale production in the world, the tractor industry, the carburized surface hardening treatment of its main driving member such as gear, axle etc. is mainly finished by two big class carburizing equipments, a kind of is that many periodic operating controlled atmosphere cementing furnaces are the carburizing heat-treatment production line that main body is formed, and another kind is that the continous way controlled atmosphere generator is the production line that main body is formed.The latter is more suitable for requirement of mass production owing to production efficiency height, energy consumption are few.The continous way cementing furnace that domestic and foreign current is on active service can be divided into two types by the mode that controlled atmosphere is provided in stove: the carburizing gas of one type of controlled atmosphere that provides for the heat absorption type producer and compositions such as propane or Sweet natural gas or town gas; Another kind of type is the instillation formula, promptly directly injects with liquid organic compound such as methyl alcohol, b propanol, ethyl acetate, acetone, benzene, toluene etc. to produce controlled atmosphere in the stove and carry out carburizing.Above-mentioned two types continous way cementing furnace all can add rare-earth energizer, produces identical urging and oozes effect.Existing continous way controlled atmosphere cementing furnace is not owing to also add rare-earth energizer, so carburizing temperature height, production cycle is long, current consumption is big, interior tissue and performance product are also not ideal enough, add behind the rare-earth energizer under the same process condition, can make carburizing speed improve 15～30%, production cycle shortens, economize on electricity 15～25%, and the inner quality of product is obviously improved.To go in order joining rare-earth energizer in the continuous oven, a special adding apparatus must to be arranged.

The purpose of this utility model is in order to address the above problem, and a kind of device that solid rare earth accelerant is added that proposes.

The purpose of this utility model is achieved in that mainly to be made up of materials-stored box, reclaimer, feeding pipe and the gate of store solids rare-earth energizer.Materials-stored box 3 is designed to one with reclaimer, reclaimer adopts chain-bucket, promptly on transmission chain 1, get hopper 2 by being equipped with one, under drive sprocket 4 drives, chain rotates a circle and takes out a solid rare earth accelerant, drive sprocket 4 is driven through speed reduction unit by micromotor, as long as adopt a simple electronics programmer, can in stove, carry quantity to control automatically to solid rare earth, in order not destroy stove internal gas pressure and gas ingredients, on the pipeline of feeding in stove, two seal gate valves 6 and 7 must be installed, when needing in the stove feeding earlier with two gate valve choke-outs, by processing requirement by the chain-bucket reclaimer with solid rare earth pour into slideway 5 enter seal gate valve 6 above, then gate valve 6 is opened, allow solid rare earth fall seal gate valve 7 above, closing gate valve 6 simultaneously, at last gate valve 7 is opened, rare-earth carburizer falls in the stove along closed conduit.Gate valve in the utility model and feeding pipe, as a whole with the reclaimer design, it can dock with pipe flange dish 8 on the continuous oven furnace roof and easily by dress, pipeline 9 on the furnace roof communicates with the burner hearth of continuous oven, and solid rare earth accelerant can directly be fallen into by gate valve 7 and work the effect of oozing of urging in the burner hearth.

The general controlled gas of continuous oven carburizing divides five zones to enter in the stove, and with corresponding with five Heating Zone Temperature controls, the utility model only need be placed in advance and ooze, oozes by force and spread three zones, and II as shown in Figure 2, III, IV district can meet the demands.Among Fig. 2 10 is the utility model, sets up the rare-earth energizer adding apparatus on active service continous way controlled atmosphere cementing furnace or instillation formula continuous acieration furnace, makes it to change into novel continuous re carburizing stove.Can add rare earth under the complete constant condition of original technology, urging under the effect of oozing of rare earth, make the pusher cycle shorten 10～20%, output but can improve 12～25%, and quality is compared with former technology and increased, and the substance energy consumption decreases.Also can keep under the constant condition of former pusher cycle carburizing temperature being reduced to 860～900 ℃, fall energy-conservation outside, can obviously reduce the distortion of gear etc. as axle.And the fringe cost of rare earth is very low, and economic benefit is very remarkable.

Fig. 1 is the utility model principle assumption diagram

Fig. 2 is a layout synoptic diagram of the present utility model

Embodiment: this patent was carried out checking on the continous way cementing furnace in the specialized factory of certain joint spider, the product object is a joint spider, material 20MnTi steel, class Three works continuously, day is handled joint spider or axle sleeve 5t, divide 5 district's temperature controls, the 1st to the 5th district's temperature is respectively 880 ℃, 920 ℃, 940 ℃, 910 ℃, 840 ℃.Have 22 charging trays in the stove, adopt methyl alcohol to make thinner, ethyl acetate is a carburizing agent, and carbon-potential control value in II district is 0.9%, and the III district is 1.2%, and the IV district is 0.9%; Case depth 1.2～1.5mm when the pusher cycle of common process carburizing is 40 minutes, metallographic structure is in the middle upper limit of inspecting standard.Under the constant condition of all processing parameters, in stove, add rare-earth energizer, when the pusher cycle was shortened 5 minutes and changes 35 minutes into, depth of penetration all in the upper limit of 1.2～1.5mm, compared with former technology slightly and improve by metallographic structure.Examination proof technological effect through 3 months is stable.Can handle 36 biscuits every day by the former technology of pusher computation of Period, novel process then can be handled 41 dishes, and production efficiency has improved 14%, can produce 700 kilograms every day more, and the substance energy consumption descends, and the cost of rare-earth carburizer is very low, and economic benefit is very remarkable.Carburizing temperature is reduced to 860～900 ℃, still can keep the pusher cycle of former technology, except that reduce workpiece deformation and energy-conservation, metallographic structure obviously improves, carbide, martensite-austenite grains refinement.In addition, can also prolong stove inner member work-ing life.

Claims (2)

1. continous way controlled atmosphere cementing furnace rare-earth energizer adding apparatus, it is characterized in that: by the materials-stored box [3] of store solids rare-earth energizer, reclaimer, feeding pipe and gate [6], [7] form, wherein materials-stored box [3] is designed to one with reclaimer, reclaimer adopts chain-bucket, promptly go up and get hopper [2] by being equipped with one at transmission chain [1], under drive sprocket [4] drives, chain rotates a circle and takes out a solid rare earth accelerant, on the pipeline of feeding in stove, two seal gate valves [6] and [7] must be installed, when needing in the stove feeding earlier with two gate valve choke-outs, by processing requirement by the chain-bucket reclaimer with solid rare earth pour into slideway [5] enter seal gate valve [6] above, then gate valve [6] is opened, allow solid rare earth fall seal gate valve [7] above, while closing gate valve [6], at last gate valve [7] is opened, rare-earth carburizer falls in the stove along closed conduit.

2. adding apparatus according to claim 1 is characterized in that: this device must be installed on the furnace roof in II, III, IV district of continous way cementing furnace.

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