CN103233104A - Quenching self-tempering special device and process for octagon hammer head - Google Patents
Quenching self-tempering special device and process for octagon hammer head Download PDFInfo
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- CN103233104A CN103233104A CN2013101582931A CN201310158293A CN103233104A CN 103233104 A CN103233104 A CN 103233104A CN 2013101582931 A CN2013101582931 A CN 2013101582931A CN 201310158293 A CN201310158293 A CN 201310158293A CN 103233104 A CN103233104 A CN 103233104A
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Abstract
The invention relates to a quenching self-tempering special device and a process for an octagon hammer head. The quenching self-tempering special device comprises furnace legs, a furnace bottom plate, a troughed guide rail, a carrying trolley, a transmission chain, a driven chain wheel and a tensioning device, a chain transmission drive system and a drive chain wheel, wherein the furnace legs support the furnace bottom plate to form a working platform, the troughed guide rail is welded on the furnace bottom plate; the transmission chain, the driven chain wheel, the tensioning device 7 and the chain transmission drive system are sequentially connected; the chain transmission drive system is arranged at the right side of the working platform and comprises a motor and a variable gear, the carrying trolley is positioned on the working platform; a manual feeding region, a heating region, a water spraying region, a self-tempering region and an automatic discharging region are sequentially arranged on the working platform from the left side; and the carrying trolley can pass through the manual feeding region, the heating region, the water spraying region, the self-tempering region and the automatic discharging region. The quenching self-tempering special device and the process provided by the invention can ensure that the octagon hammer head has higher hardness and wear resistance and smaller brittleness, and are low in cost, small in labor intensity, high in production efficiency and wide in market prospect.
Description
Technical field
The invention belongs to the metal heat treatmet field, be specifically related to a kind of octagon hammer tup two hammering end hardenings and utilize heart portion waste heat to realize specific equipment and the technology thereof of low temperature self-tempering.
Background technology
Octagon hammer is made up of (wooden) tup and hammer, is mainly used in hard object surfaces such as hammering nail, drill rod, stone, plastic making steel part, is one of hardware ﹠ tools commonly used.
According to the behaviour in service analysis of tup, tup heart portion should have higher impact resistance, and tup two hammering end faces should have higher hardness and wear resisting property.So, generally adopt 50～60 carbon constructional quality steels to forge into blank, be machined into concrete shape and size; The whole modified or normalizing thermal treatment of tup, low-temperaturetempering after two hammering end face surface are quenched.After the thermal treatment, the surface hardness of hammering end face requires to reach 48～56HRC, depth of hardening zone 〉=3mm, and hole portion hardness is lower than 35HRC.
The existing thermal treatment process of tup is at first to adopt complete heat treatment, quench back high tempering (modifier treatment) or normalizing thermal treatment; Secondly, two hammering end faces adopt ratio-frequency heating, artificial water-cooled, realize hard surfacing; At last, come off, collapse when the hammering broken for preventing hardened layer, whole low-temperaturetempering under the prerequisite that keeps two hammering end face high rigidity, high-wearing feature, is eliminated internal stress and the fragility of quenching and producing.
In actual production process, some producers are for saving the thermal treatment expense, and last low-temperaturetempering technology has given omission, thereby cause and the product of inferior quality occurs.
The producer that also has be to save more expenses, adopts and forges directly manual operations of back, is quenched in the direct top layer of two hammering end faces and utilizes the waste heat self-tempering of heart portion.But owing to the state of the art height of this manipulation require, be difficult to control top layer quenching temperature and self tempering temperature, often cause that the hardness deviation is big, hardness is inhomogeneous, plasticity and toughness are bad, mechanical workout is difficult, near problem such as the easy to crack hardy hole, the qualification rate of tup is lower.
The shortcoming of existing thermal treatment process is that complex process, type of heat treatment and operation are many, route is long; During ratio-frequency heating, adopt manual observation steel part color to determine temperature, the Heating temperature error is big; Water-cooled time Artificial Control makes the temperature deviation of self-tempering big, causes the hardness value fluctuation of two hammering end faces big, unstable properties.
Summary of the invention
The present invention provides a kind of octagon hammer tup quenching self-tempering specific equipment and technology thereof for solving the problems of the prior art, and it can make tup have higher hardness and wear resistance, and fragility is less, and cost is low, is suitable for producing in batches.
The present invention is achieved by the following technical solutions:
A kind of octagon hammer tup quenching self-tempering specific equipment, this equipment comprise stove leg, drop-bottom, grooved guide rail, loading dolly, driving chain, by movable sprocket and tightening device, chain drive drive system, drive sprocket, box resistance heading furnace, water spray plate; Described stove leg supports drop-bottom and constitutes worktable, and described grooved guide rail is for waiting two channel-section steels being longer than drop-bottom, and the notch of two channel-section steel is welded in the both sides of the lateral mid-point of drop-bottom relatively, and the loading dolly is stablized mobile in two channel-section steels and retrained by it; Described driving chain, linked to each other successively by movable sprocket and tightening device, drive sprocket and chain drive drive system, described chain drive drive system is made of electric motor and variable gear, and is installed on the right side of worktable; Described loading dolly distributes one every 0.3m, and is connected by driving chain, and described loading dolly is arranged in the worktable top slot-in type guide rail 3 of going forward side by side; Begin to be provided with successively artificial feeding area, heating zone, water spray district, self-tempering district and discharge zone automatically on the described worktable from the left side.
Described artificial feeding area is positioned at the left end zone of worktable.
Described heating zone is provided with box resistance heading furnace, and described box resistance heading furnace from inside to outside is made of resistance wire, flame retardant coating, thermal insulation layer successively; Width such as described box resistance heading furnace and worktable and being fixed on the worktable, and with the drop-bottom of worktable as box resistance heading furnace; Described resistance wire hangs over the inboard of flame retardant coating as the thermal source of box resistance heading furnace, and box resistance heading furnace top also is provided with thermopair and temperature control instrument thereof.
Described water spray district is made of two relative water spray plates, described water spray plate medial surface is provided with some spout holes, described two water spray plates closely are fixed on along grooved guide rail direction near the both sides of octagon hammer tup two hammering end face processes on the worktable, when the octagon hammer tup through out-of-date, the water of ejection acts on the two hammering end faces;
Described self-tempering district is octagon hammer tup natural air cooling zone.
Described automatic discharge zone is positioned at the zone, lower right of drive sprocket.
Described artificial feeding area, heating zone, water spray district, self-tempering district and automatic discharge zone can both be by the loading dollies.
The diameter of spout hole is 1～5mm on the described water spray plate, pitch of holes is 5～20mm, the quantity of described water spray plate upper edge grooved guide rail spout hole or along the arrangement length of grooved guide rail direction water spray plate, the specification size that depends on the octagon hammer tup, this arrangement length should guarantee that octagon hammer tup two hammering end hardenings obtain martensite, can make it have enough heart portion waste heat back pass to two hammering end faces to realize self-tempering again.
Preferably, described arrangement length along grooved guide rail direction water spray plate is 0.1～0.8m.
Preferably, the spout hole on the described water spray plate is 5～20mm with two hammering end clearances of the tup that is passed through.
A kind of octagon hammer tup quenching self-tempering technology of using described specific equipment, it may further comprise the steps:
A, at artificial feeding area, utilize its middle hammer the hole octagon hammer tup, by manually laterally being placed on the support bar of loading dolly, then, driving the loading dolly by driving chain and enter artificial feeding area, heating zone, water spray district, self-tempering district and automatic discharge zone successively; Made chain tightens by movable sprocket and tightening device thereof, and guarantee to make the loading moving of car steady, the chain drive drive system is used for changing the rotating speed of sprocket wheel, realizes that loading dolly and octagon hammer tup move with friction-motion speed on worktable.
When the octagon hammer tup passes through the heating zone, be heated to 840～860 ℃, and form austenite structure;
When the octagon hammer tup passed through in the water spray district, the water of spout hole ejection quenched octagon hammer tup two hammering faces on the water spray plate; The layout quantity of spout hole guarantees that octagon hammer tup two hammering end hardenings obtain martensite, can make it have enough heart portion waste heat back pass to two hammering end faces to realize self-tempering again.
Then, the octagon hammer tup enters the self-tempering district and carries out air cooling, and in this stage, heat back pass to the two hammering end face of octagon hammer tup heart portion makes about temperature recovery to 200～240 ℃ of two hammering end faces, and kept this temperature 5-30 minute or the longer time.
Afterwards, the octagon hammer tup enters automatic discharge zone, when the octagon hammer tup moves to the lower right of drive sprocket, under action of gravity, breaks away from automatically with support bar on the loading dolly or stirs and come off by the oblique fork of equipment outside.
The heat-up time of described octagon hammer tup in box resistance heading furnace is t=KD, and wherein K is the heating coefficient of box resistance heading furnace, and the unit of K is min/mm; D is the gauge on the tup end cross-sectional, and unit is mm; The unit of t is minute; Described heating coefficient K=1～2.
The movement velocity of described chain is that the length of box resistance heading furnace is divided by t heat-up time.
Described octagon hammer tup two hammering end hardening technologies are:
Driving chain enters in the box resistance heading furnace with the movement velocity traction loading dolly of setting, make the octagon hammer tup that is placed in above the loading dolly support bar by the box resistance heading furnace burner hearth of constant temperature at 840～860 ℃, be heated to the whole austenite structure that obtains of tup; Subsequently, entering the water spray district makes two hammering end face water-cooled to room temperatures form martensite.
Preferably, described octagon hammer tup quenching self-tempering technology, it comprises following concrete steps:
5 kilograms of octagon hammer tups that use 55 steels to make adopt octagon hammer tup quenching self-tempering specific equipment long by 10, wide 1m, high 1.6m; The box resistance heading furnace that the heating zone is long by 5m, 1m is wide, 0.8m is high realizes that the temperature control in the about 0.24m of resistance furnace thermal insulation layer mean thickness, the about 0.12m of flame retardant coating mean thickness, burner hearth is at 840～860 ℃; Regulate the chain drive drive system and make chain pass through process furnace with the speed of per minute 0.4～0.6m, tup integral body can form austenite structure; Water spray district's spout hole is set to 0.2～0.4m along the length of guide rail direction, makes two hammering end hardenings on the one hand, when making the heat of octagon hammer tup inside reach the top layer on the other hand skin temperature is risen to about 200～240 ℃, realizes the low temperature self-tempering.
The present invention compared with prior art has following significant advantage:
A kind of octagon hammer tup quenching self-tempering specific equipment provided by the invention and technology thereof, except artificial material loading (laying workpiece), need not other manual operations, process stabilizing, every performance of tup meets the requirements and fluctuates little; By regulating the speed (to realize different soaking times) of chain drive drive system change transmission chain, can handle the tup of different size; Because what adopt is the two hammering end face surface quenching (water spray cooling) of tup, tup heart portion speed of cooling is faster than cooling in the air, what obtain is sorbite or troostite tissue the normalizing thermal treatment of cooling (be equivalent to dry), has intensity, hardness and plasticity and toughness preferably; And two hammering end faces for the low-temperaturetempering tissue after quenching (because of spout hole quantity on the water spray plate along guide rail direction adjustable length, so can control self tempering temperature, thereby obtain tempered martensite and change the lower bainite tissue that forms by residual austenite on a small quantity), have higher hardness and wear resistance, and fragility is less, incrust.
Heating zone (box resistance heading furnace) in the octagon hammer tup two hammering end face surface quenching self-tempering specific equipments that the present invention relates to, adopt the drop-bottom Seal Design, compare with traditional drop-bottom process furnace, can effectively prevent the convection current of furnace gas and atmosphere, save the heating expense; Again because the thermolysis of drop-bottom itself and the phase of the support bar on the loading dolly narrow slit iris action of refractory brick nearby, the unlikely high temperature that is heated to of loading dolly, reduced the resistance to elevated temperatures requirement of loading dolly and grooved guide rail manufactured materials, saved the device fabrication expense, improved productivity effectively, and the batch thermal treatment of suitable octagon hammer tup.
Description of drawings
Fig. 1 is octagon hammer tup quenching self-tempering specific equipment structural representation of the present invention;
Fig. 2 is octagon hammer tup quenching self-tempering specific equipment structural representation vertical view;
Fig. 3 is A-A view among Fig. 1;
Fig. 4 is B-B view among Fig. 1.
Embodiment
Specific embodiments of the present invention is described in detail with reference to the accompanying drawings.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4.
A kind of octagon hammer tup quenching self-tempering specific equipment, this equipment comprise stove leg 1, drop-bottom 2, grooved guide rail 3, loading dolly 5, driving chain 6, by movable sprocket and tightening device 7, chain drive drive system 8, drive sprocket 9, box resistance heading furnace, water spray plate; Described stove leg 1 supports drop-bottom 2 and constitutes worktable, described grooved guide rail 3 is for waiting two channel-section steels being longer than drop-bottom 2, the notch of two channel-section steel is welded in the both sides of the lateral mid-point of drop-bottom 2 relatively, and loading dolly 5 is stablized mobile in two channel-section steels and retrained by it; Described driving chain 6, linked to each other successively by movable sprocket and tightening device 7, drive sprocket 9 and chain drive drive system 8, described chain drive drive system 8 is made of electric motor and variable gear, and is installed on the right side of worktable; Described loading dolly 5 distributes one every 0.3m, and is connected by driving chain 6, and described loading dolly is arranged in the worktable top slot-in type guide rail 3 of going forward side by side; Begin to be provided with successively artificial feeding area C, heating zone D, water spray district E, self-tempering district F and discharge zone G automatically on the described worktable from the left side.
Described artificial feeding area C is positioned at the left end zone of worktable.
Described heating zone D is provided with box resistance heading furnace, and described box resistance heading furnace from inside to outside is made of resistance wire 11, flame retardant coating 12, thermal insulation layer 13 successively; Width such as described box resistance heading furnace and worktable and being fixed on the worktable, and with the drop-bottom of worktable as box resistance heading furnace; Described resistance wire 11 hangs over the inboard of flame retardant coating 12 as the thermal source of box resistance heading furnace, and box resistance heading furnace top also is provided with thermopair and temperature control instrument 10 thereof.
Described water spray district E is made of two relative water spray plates 14, described water spray plate 14 medial surfaces are provided with some spout holes, described two water spray plates 14 closely are fixed on along grooved guide rail direction near the both sides of octagon hammer tup two hammering end face processes on the worktable, when the octagon hammer tup through out-of-date, the water of ejection acts on the two hammering end faces.
Described self-tempering district F is octagon hammer tup natural air cooling zone.
Described automatic discharge zone G is positioned at the zone, lower right of drive sprocket 9.
Described artificial feeding area C, heating zone D, water spray district E, self-tempering district F and automatic discharge zone G can both be by loading dollies 5.
The diameter of spout hole is 1～5mm on the described water spray plate, pitch of holes is 5～20mm, the quantity of described water spray plate upper edge grooved guide rail spout hole or along the arrangement length of grooved guide rail direction water spray plate, the specification size that depends on the octagon hammer tup, this arrangement length should guarantee that octagon hammer tup two hammering end hardenings obtain martensite, can make it have enough heart portion waste heat back pass to two hammering end faces to realize self-tempering again.
Preferably, described arrangement length along grooved guide rail direction water spray plate is 0.1～0.8m.
Preferably, the spout hole on the described water spray plate is 5～20mm with two hammering end clearances of the tup that is passed through.
A kind of octagon hammer tup quenching self-tempering technology of using described specific equipment, it may further comprise the steps:
A, at artificial feeding area, utilize its middle hammer the hole octagon hammer tup 4, by manually laterally being placed on the support bar of loading dolly 5, then, driving loading dolly 5 by driving chain 6 and enter artificial feeding area, heating zone, water spray district, self-tempering district and automatic discharge zone successively; Made chain tightens by movable sprocket and tightening device 7 thereof, and guarantee to make the loading moving of car steady, chain drive drive system 8 is used for changing the rotating speed of sprocket wheel, realizes that loading dolly and octagon hammer tup move with friction-motion speed on worktable.
When the octagon hammer tup passes through heating zone D, be heated to 840～860 ℃, and form austenite structure;
When the octagon hammer tup water spray district E by the time, the water of spout hole ejection quenches octagon hammer tup two hammering faces on the water spray plate; The layout quantity of spout hole guarantees that octagon hammer tup two hammering end hardenings obtain martensite, can make it have enough heart portion waste heat back pass to two hammering end faces to realize self-tempering again.
Then, the octagon hammer tup enters self-tempering district F and carries out air cooling, and in this stage, heat back pass to the two hammering end face of octagon hammer tup heart portion makes about temperature recovery to 200～240 ℃ of two hammering end faces, and kept this temperature 5-30 minute or the longer time.
Afterwards, the octagon hammer tup enters automatic discharge zone, when the octagon hammer tup moves to the lower right of drive sprocket 9, under action of gravity, breaks away from automatically with support bar on the loading dolly or stirs and come off by the oblique fork of equipment outside.
The heat-up time of described octagon hammer tup in box resistance heading furnace is t=KD, and wherein K is the heating coefficient of box resistance heading furnace, and the unit of K is min/mm; D is the gauge on the tup end cross-sectional, and unit is mm; The unit of t is minute; Described heating coefficient K=1～2.
The movement velocity of described chain is that the length of box resistance heading furnace is divided by t heat-up time.
Described octagon hammer tup two hammering end hardening technologies are:
Driving chain enters in the box resistance heading furnace with the movement velocity traction loading dolly of setting, make the octagon hammer tup that is placed in above the loading dolly support bar by the box resistance heading furnace burner hearth of constant temperature at 840～860 ℃, be heated to the whole austenite structure that obtains of tup; Subsequently, entering the water spray district makes two hammering end face water-cooled to room temperatures form martensite.
Working process of the present invention is:
Connect device power supply (DPS), on the worktable of being made up of stove leg 1, drop-bottom 2, resistance wire 11 evolutions of heat of box resistance heading furnace by thermopair and 10 controls of temperature control instrument thereof, make the burner hearth constant temperature of box resistance heading furnace at 840～860 ℃.Because box resistance heading furnace is to be made of flame retardant coating 12, thermal insulation layer 13, so outwards heat radiation less, energy consumption is low;
Measure the gauge D(mm on the tup end cross-sectional), according to formula t=KD(min; K=1～2 wherein, min/mm) calculate heat-up time, with the length of box resistance heading furnace divided by heat-up time t obtain the movement velocity of chain, open chain drive drive system 8, and regulate its speed, drive drive sprocket 9 and rotate, it is at the uniform velocity mobile with the speed that calculates in grooved guide rail 3 to make driving chain 6 drag loading dolly 5.
At artificial feeding area, utilize its middle hammer the hole octagon hammer tup 4, by manually laterally being placed on the support bar of loading dolly 5, then, driving loading dolly 5 by driving chain 6 and enter artificial feeding area, heating zone, water spray district, self-tempering district and automatic discharge zone successively along grooved guide rail 3; Made chain tightens, loading moving of car steady by movable sprocket and tightening device 7;
When the octagon hammer tup passes through heating zone D, in the burner hearth of box resistance heading furnace, be heated to 840～860 ℃, form austenite.
When the octagon hammer tup was distinguished E by water spray, the water of spout hole ejection quenched tup two hammering faces on the water spray plate 14.
The octagon hammer tup enters self-tempering district F and carries out air cooling then, in this stage, heat back pass to the two hammering end face of octagon hammer tup heart portion, make about temperature recovery to 200～240 ℃ of two hammering end faces, and kept this temperature 2-30 minute or the above time, realize the low temperature self-tempering technology of two hammering end faces;
Afterwards, when the octagon hammer tup moves to the lower right of drive sprocket 9, under action of gravity, break away from automatically with support bar on the loading dolly or stir and come off by the oblique fork of equipment outside, finish octagon hammer tup quenching self-tempering thermal treatment process.
Embodiment 1
5 kilograms of octagon hammer tups that use 55 steels to make adopt octagon hammer tup quenching self-tempering specific equipment long by 10, wide 1m, high 1.6m.The box resistance heading furnace that the heating zone is long by 5m, 1m is wide, 0.8m is high realizes that the temperature control in the about 0.24m of resistance furnace thermal insulation layer mean thickness, the about 0.12m of flame retardant coating mean thickness, burner hearth is at 840～860 ℃; Regulate the chain drive drive system and make chain pass through process furnace with the speed of per minute 0.4～0.6m, tup integral body can form austenite structure; Water spray district's spout hole is set to 0.2～0.4m along the length of guide rail direction, not only can make two hammering end hardenings, but also skin temperature is risen to about 200～240 ℃ can make the heat of octagon hammer tup inside reach the top layer time, realizes the low temperature self-tempering.So, whole normalizing and the quenching of two hammering end face surface and the low temperature self-tempering thermal treatment process thereof of octagon hammer tup have been realized, the surface hardness of two hammering end faces of gained tup is 50～54HRC, depth of hardening zone is about 5～7mm, hole portion hardness is 28～32HRC, the use properties requirement has been satisfied in flawless, nothing distortion, has obtained qualified product.
Embodiment 2
2 kilograms of octagon hammer tups that use 55 steels to make, still adopt the specific equipment among the embodiment 1, temperature control in the box resistance heading furnace burner hearth is at 840～860 ℃, regulate the chain drive drive system and make chain pass through process furnace with the speed of per minute 0.5～0.7m, tup integral body can form austenite structure; Water spray district spout hole is set to 0.15～0.35m along the length of guide rail direction, suitably adjust spray flow, can make two hammering end hardenings, and can be in the self-tempering district, octagon hammer tup skin temperature is gone up to about 200～240 ℃, and kept 5～30 minutes or the above time, realize the low temperature self-tempering.So, whole normalizing and the quenching of two hammering end face surface and the low temperature self-tempering thermal treatment process thereof of octagon hammer tup have been realized, the surface hardness of two hammering end faces of gained tup is 50～54HRC, depth of hardening zone is about 5～7mm, hole portion hardness is 28～32HRC, the use properties requirement has been satisfied in flawless, nothing distortion, has obtained qualified product equally.
Claims (9)
1. octagon hammer tup quenching self-tempering specific equipment, it is characterized in that this equipment comprises stove leg (1), drop-bottom (2), grooved guide rail (3), loading dolly (5), driving chain (6), by movable sprocket and tightening device (7), chain drive drive system (8), drive sprocket (9), box resistance heading furnace, water spray plate; Described stove leg (1) supports drop-bottom (2) and constitutes worktable, described grooved guide rail (3) is to wait two channel-section steels being longer than drop-bottom (2), the notch of two channel-section steel is welded in the both sides of the lateral mid-point of drop-bottom (2) relatively, and loading dolly (5) is stablized mobile in two channel-section steels and retrained by it; Described driving chain (6), linked to each other successively by movable sprocket and tightening device (7), drive sprocket (9) and chain drive drive system (8), described chain drive drive system (8) is made of electric motor and variable gear, and is installed on the right side of worktable; Described loading dolly (5) distributes one every 0.3m, and is connected by driving chain (6), and described loading dolly is arranged in the worktable top slot-in type guide rail (3) of going forward side by side; Begin to be provided with successively artificial feeding area (C), heating zone (D), water spray district (E), self-tempering district (F) and automatic discharge zone (G) on the described worktable from the left side;
Described artificial feeding area (C) is positioned at the left end zone of worktable;
Described heating zone (D) is provided with box resistance heading furnace, and described box resistance heading furnace from inside to outside is made of resistance wire (11), flame retardant coating (12), thermal insulation layer (13) successively; Width such as described box resistance heading furnace and worktable and being fixed on the worktable, and with the drop-bottom of worktable as box resistance heading furnace; Described resistance wire (11) hangs over the inboard of flame retardant coating (12) as the thermal source of box resistance heading furnace, and box resistance heading furnace top also is provided with thermopair and temperature control instrument (10) thereof;
Described water spray district (E) is made of two relative water spray plates (14), described water spray plate (14) medial surface is provided with some spout holes, described two water spray plates (14) are fixed on the both sides worktable of octagon hammer tup two hammering end face processes along grooved guide rail direction, when the octagon hammer tup through out-of-date, the water of ejection acts on the two hammering end faces;
Described self-tempering district (F) is octagon hammer tup natural air cooling zone;
Described automatic discharge zone (G) is positioned at the zone, lower right of drive sprocket (9).
Described artificial feeding area (C), heating zone (D), water spray district (E), self-tempering district (F) and automatic discharge zone (G) can both be by loading dolly (5).
2. as right 1 described a kind of octagon hammer tup quenching self-tempering specific equipment, it is characterized in that, the diameter of spout hole is 1～5mm on the described water spray plate, pitch of holes is 5～20mm, the quantity of described water spray plate upper edge grooved guide rail spout hole or along the arrangement length of grooved guide rail direction water spray plate, the specification size that depends on the octagon hammer tup, this arrangement length should guarantee that octagon hammer tup two hammering end hardenings obtain martensite, can make it have enough heart portion waste heat back pass to two hammering end faces to realize self-tempering again.
3. as right 2 described a kind of octagon hammer tup quenching self-tempering specific equipments, it is characterized in that described arrangement length along grooved guide rail direction water spray plate is 0.1～0.8m.
4. as right 1 described a kind of octagon hammer tup quenching self-tempering specific equipment, it is characterized in that the spout hole on the described water spray plate is 5～20mm with two hammering end clearances of the tup that is passed through.
5. a right to use requires the octagon hammer tup quenching self-tempering technology of 1 described specific equipment, it is characterized in that it may further comprise the steps:
A, at artificial feeding area, utilize its middle hammer the hole octagon hammer tup (4), by manually laterally being placed on the support bar of loading dolly (5), then, drive loading dolly (5) by driving chain (6) and enter artificial feeding area, heating zone, water spray district, self-tempering district and automatic discharge zone successively; Made chain tightens by movable sprocket and tightening device (7) thereof, and guarantee to make the loading moving of car steady, chain drive drive system (8) is used for changing the rotating speed of sprocket wheel, realizes that loading dolly and octagon hammer tup move with friction-motion speed on worktable;
When the octagon hammer tup passes through heating zone (D), be heated to 840～860 ℃, and form austenite structure;
When the octagon hammer tup passed through in water spray district (E), the water of spout hole ejection quenched octagon hammer tup two hammering faces on the water spray plate; The layout quantity of spout hole guarantees that octagon hammer tup two hammering end hardenings obtain martensite, can make it have enough heart portion waste heat back pass to two hammering end faces to realize self-tempering again;
Then, the octagon hammer tup enters self-tempering district (F) and carries out air cooling, in this stage, and heat back pass to the two hammering end face of octagon hammer tup heart portion, make about temperature recovery to 200～240 ℃ of two hammering end faces, and kept this temperature 5-30 minute or the longer time;
Afterwards, the octagon hammer tup enters automatic discharge zone, when the octagon hammer tup moves to the lower right of drive sprocket (9), under action of gravity, breaks away from automatically with support bar on the loading dolly or stirs and come off by the oblique fork of equipment outside.
6. octagon hammer tup quenching self-tempering technology as claimed in claim 5 is characterized in that,
The heat-up time of described octagon hammer tup in box resistance heading furnace is t=KD, and wherein K is the heating coefficient of box resistance heading furnace, wherein, K=1～2, D is the gauge on the tup end cross-sectional.
7. octagon hammer tup quenching self-tempering technology as claimed in claim 5 is characterized in that, the movement velocity of described chain is that the length of box resistance heading furnace is divided by t heat-up time.
8. octagon hammer tup quenching self-tempering technology as claimed in claim 5 is characterized in that, described octagon hammer tup two hammering end hardening technologies are:
Driving chain enters in the box resistance heading furnace with the movement velocity traction loading dolly of setting, make the octagon hammer tup that is placed in above the loading dolly support bar by the box resistance heading furnace burner hearth of constant temperature at 840～860 ℃, be heated to the whole austenite structure that obtains of tup; Subsequently, entering the water spray district makes two hammering end face water-cooled to room temperatures form martensite.
9. octagon hammer tup quenching self-tempering technology as claimed in claim 5 is characterized in that it comprises following concrete steps:
5 kilograms of octagon hammer tups that use 55 steels to make adopt octagon hammer tup quenching self-tempering specific equipment long by 10, wide 1m, high 1.6m; The box resistance heading furnace that the heating zone is long by 5m, 1m is wide, 0.8m is high realizes that the temperature control in the about 0.24m of resistance furnace thermal insulation layer mean thickness, the about 0.12m of flame retardant coating mean thickness, burner hearth is at 840～860 ℃; Regulate the chain drive drive system and make chain pass through process furnace with the speed of per minute 0.4～0.6m, tup integral body can form austenite structure; Water spray district's spout hole is set to 0.2～0.4m along the length of guide rail direction, makes two hammering end hardenings on the one hand, when making the heat of octagon hammer tup inside reach the top layer on the other hand skin temperature is risen to about 200～240 ℃, realizes the low temperature self-tempering.
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