CN103447775B - Processing technology of single hook - Google Patents
Processing technology of single hook Download PDFInfo
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- CN103447775B CN103447775B CN201310419072.5A CN201310419072A CN103447775B CN 103447775 B CN103447775 B CN 103447775B CN 201310419072 A CN201310419072 A CN 201310419072A CN 103447775 B CN103447775 B CN 103447775B
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Abstract
The invention provides a processing technology of a single hook. The processing technology of the single hook comprises the following steps: cutting a blank with phi 85 mm*430 mm; heating, bending, pre-forging and finally forging the blank into a forge piece, wherein exhaust holes are formed in a finish-forging die and high-pressure gas is discharged in a die cavity in the finish-forging process, so that the blank corresponding to a bending part of the single hook is filled in the die cavity; after performing ash cooling on the forge piece, performing trimming, thermal calibration, deburring, cold correction, annealing, shot blasting, drilling of a shaft hole, an end hole and an elastic cylindrical pin hole and preparation of a pin shaft to finally finish assembling of the single hook.
Description
technical field
The present invention relates to single hook processing technology.
background technology
As shown in Figure 1, single hook comprises coupler body 1 and the fork-shaped neck of hook 2, at the bottom of indicating 7 indication hooks, the bend of mark 8 indication hooks, on the neck of hook, offer run through two yokes pin shaft hole 4 to hold bearing pin 3, the outer end radial contraction of left yoke pin shaft hole forms the less stomidium 6 of diameter in case shotpin axle is deviate from from this end, and right yoke outside has vertical with pin shaft hole and runs through the elastic cylinder pin-and-hole 5 of right yoke, and elastic cylindrical pin pore volume is received elastic cylindrical pin and deviate from from this end to stop bearing pin.
summary of the invention
The technical problem to be solved in the present invention is to provide a kind of single hook processing technology.
In order to solve the problems of the technologies described above, technical scheme of the present invention is:
A single hook processing technology, order realizes according to the following steps:
1) by material, be that the bar of 4Cr14Ni14W2Mo stainless refractory steel is placed on unpowered horizontal feed Roller conveyor extending longitudinally, Roller conveyor the place ahead is provided with rear grip mechanism and the front clamp mechanism of passing for bar, rear grip mechanism and front clamp mechanism all can and unclamp under two kinds of active states of bar at clamping bar and switch, front clamp mechanism the place ahead is provided with Direct Action Type travel switch, the nozzle of laser cutting machine cutting head is between front clamp mechanism and Direct Action Type travel switch, the fore-and-aft distance of nozzle and Direct Action Type travel switch is cutting length, front clamp mechanism is near nozzle, rear grip mechanism clamps bar and proceeds to when bar front end touches Direct Action Type travel switch, front clamp mechanism clamps bar, rear grip mechanism unclamps bar and retreats reset, cutting head cutting bar, complete cutting action one time, then, rear grip mechanism clamps bar, bar unclamps in front clamp mechanism, rear grip mechanism drives bar to proceed to when bar front end touches Direct Action Type travel switch, front clamp mechanism clamps bar, rear grip mechanism unclamps bar and retreats reset, cutting head cutting bar, complete cutting action next time, so move in circles, complete blank blanking operation, billet size Φ 85mm * 430 mm,
2) many blanks are deposited in heating furnace and are heated, 905 ℃ of blank charging temperatures, furnace temperature is incubated 85min after rising to 1170 ℃; On punch press, make the curved shape of itself and single hook basically identical blank bending after heating; With heating furnace, blocker is heated to 900 ℃; With heating furnace, finisher is heated to 900 ℃;
3) blocker adopts horizontal parting, and upper and lower mould is symmetrical, and 1140 ℃ of blocking temperature, carry out blocking;
4) finisher adopts horizontal parting, upper and lower mould is symmetrical, all has and link up the corresponding die cavity of single hook bend and extraneous Φ 2mm steam vent on upper die and lower die, and a port of steam vent is positioned at the corresponding die cavity of single hook bend bottom, 910 ℃ of final forging temperatures, carry out finish-forging;
5) forging is imbedded in ash cooling, length of embedment is greater than 40cm, ash discharge when forging is cooled to 130 ℃, and then air cooling is to room temperature;
6) adopt edger that unnecessary burr are removed;
7) many forging being deposited in to furnace temperature is to heat in the heating furnace of 800 ℃, insulation 35min; Then put into straightening die and carry out thermal recalibration;
8) forging is imbedded in ash cooling, length of embedment is greater than 40cm, when forging is cooled to 100 ℃, forging is taken out, and with abrasive brush, forging is removed to burr;
9) put into gagging mould and carry out gagging, gagging mould adopts horizontal parting, and upper gagging mould and lower gagging mould are symmetrical;
10) forging is deposited in annealing furnace, with stove, is slowly warming up to 830 ℃, programming rate is 10 ℃/min, is incubated 2.5 hours, and then forging is put into 50 ℃ of flowing water and is cooled to 450 ℃, and the heating furnace of putting into 450 ℃ is incubated 2 hours, then cools to room temperature with the furnace;
11) carry out bead;
12) lead plug axis hole, stomidium and elastic cylinder pin-and-hole: the lower gagging mould shape of lower clamp and coupler body corresponding part is identical, upper fixture is identical with gagging mould shape on coupler body corresponding part, lower clamp and upper fixture clamp coupler body jointly, and the forging of clamping is in lying status; Forging right side has the right drill bit that size and pin shaft hole match, on the left of forging, there is the left drill bit that size and stomidium match, above forging, there is the vertically-arranged drill bit that size and elastic cylinder pin-and-hole match, left drill bit and right drill bit horizontal and be positioned on a horizontal line, right drill bit is feed motion lead plug axis hole left, after bearing pin hole drill is complete, stomidium is bored in the feed motion to the right of left drill bit, and elastic cylinder pin-and-hole is bored in the downward feed motion of vertically-arranged drill bit simultaneously;
13) by material, be that the wire rod of 4Cr14Ni14W2Mo stainless refractory steel cuts into the member isometric with bearing pin, finish turning member periphery and both ends of the surface, then become bearing pin by member chamfer machining on lathe;
14) bearing pin is packed in pin shaft hole, then elastic cylindrical pin is packed in elastic cylinder pin-and-hole, complete single hook processing.
Above-mentioned single hook processing technology, heat-treats after step 10), and then carries out step 11); Heat treated concrete operation is:
When heating furnace is warming up to 900 ℃, forging heap is put into heating furnace, when heating furnace is warming up to 1000 ℃, be incubated 2.5 days, then 1h is cooled to below 15 ℃, keeps 30min, then is heated to 560 ℃ of maintenance 70min, and air cooling is to room temperature.
Above-mentioned single hook processing technology, to carrying out Wear-resistant Treatment at the bottom of hook, and then carries out step 12) after step 11);
The concrete operation of Wear-resistant Treatment is: first by immersing 20min in boiling water at the bottom of the hook of coupler body, carry out hot water wash, by immersing temperature at the bottom of the hook of coupler body, be then digestion 40min in the pickle of 80 ℃, flowing water is washed again, and then be digestion 20min in the pickle of 80 ℃ by immersing temperature at the bottom of the hook of coupler body, then carry out flowing water and wash and be dried; Pickle contains 18%H
2sO
4 , 6%HCl, 6%HNO
3 , all the other are water;
Dried coupler body is preheated to 600 ℃ and be incubated 10min, then adopts RMD136 Mold Surfacing Electrode at the thick bottom of hook basal surface built-up welding 2.5-3mm; Then adopt RMD248 Mold Surfacing Electrode in the thick intermediate layer of bottom surface built-up welding 3mm; Then carry out postwelding tempering, 520 ℃ of temperature, insulation 3h, then air cooling is to room temperature; Then adopt plasma gun at the diamond coatings of interlayer surfaces spraying one deck 2mm.
Above-mentioned single hook processing technology, processes bearing pin after step 13), and then carries out step 14);
Concrete operation is:
Finish turning bearing pin middle part makes bearing pin middle part form annular groove, the dark 6mm of annular groove;
When furnace temperature rises to 900 ℃, bearing pin heap is put into stove and heat, when furnace temperature rises to 1000 ℃, be incubated 20h, 50min cool to room temperature then, room temperature is placed 30min, then is heated to 560 ℃ and be incubated 50min, and air cooling is to room temperature;
Then by bearing pin hot water wash 20min in hot water storgae, then bearing pin is sunk in descaling bath, pickle temperature maintains 50 ℃, and in descaling bath, bearing pin checks once every 5min, until bearing pin surface scale removes completely, and then cold wash, dry; Pickle contains 5% hydrofluoric acid, 10% nitric acid, and all the other are water;
Dried bearing pin is preheated to 600 ℃ and be incubated 20min, then adopts RMD136 Mold Surfacing Electrode thick bottom of built-up welding 2mm on annular groove bottom land; Then adopt RMD248 Mold Surfacing Electrode in the thick intermediate layer of bottom surface built-up welding 2mm; Carry out again postwelding tempering, 520 ℃ of temperature, insulation 2h, then air cooling is to room temperature; Then adopt plasma gun at the diamond coatings of interlayer surfaces spraying one deck 2mm.
Above-mentioned single hook processing technology, processes bearing pin after step 13), and then carries out step 14);
Concrete operation is:
Finish turning bearing pin middle part makes bearing pin middle part form annular groove, the dark 6mm of annular groove;
When furnace temperature is 900 ℃, bearing pin heap is put into stove and heat, when furnace temperature rises to 1000 ℃, be incubated 20h, 50min cool to room temperature then, room temperature is placed 30min, then is heated to 560 ℃ of insulation 50min, and air cooling is to room temperature;
Then by bearing pin hot water wash 20min in hot water storgae, be dried to bearing pin surface anhydrous, put into alkaline bath digestion 20min, alkali wash water temperature maintains 90 ℃, the bearing pin taking out from alkaline bath is dropped into rapidly to flowing water the gutter channel 10 ℃ below and wash, follow that bearing pin is immersed to temperature is digestion 20min in the pickle of 80 ℃, then flowing water is washed, and then bearing pin is immersed to temperature is digestion 20min in the pickle of 80 ℃, then carries out flowing water and wash and be dried; Alkali wash water contains 13% NaOH, 10% sodium nitrate, and all the other are water; Pickle contains 18%H
2sO
4 , 6%HCl, 6%HNO
3 , all the other are water;
Dried bearing pin is preheated to 600 ℃ and be incubated 20min, then adopts RMD136 Mold Surfacing Electrode thick bottom of built-up welding 2mm on annular groove bottom land; Then adopt RMD248 Mold Surfacing Electrode in the thick intermediate layer of bottom surface built-up welding 2mm; Carry out again postwelding tempering, 520 ℃ of temperature, insulation 2h, then air cooling is to room temperature; Then adopt plasma gun at the diamond coatings of interlayer surfaces spraying one deck 2mm.
Above-mentioned single hook processing technology, bearing pin groove groove width equals the spacing of the neck of hook two yokes.
First complete the blank cutting of Φ 85mm * 430 mm, then blank heating, bending, blocking, finish-forging are become to forging, on finisher, there is steam vent, in finish-forging process, discharge die cavity inner high voltage gas, be beneficial to blank corresponding to single hook bend and be full of die cavity.Trimming after forging ash cooling, thermal recalibration, deburring, gagging, annealing, bead, lead plug axis hole, stomidium and elastic cylinder pin-and-hole, bearing pin preparation, finally complete single hook assembling.
accompanying drawing explanation
Fig. 1 is the structural representation of single hook.
The specific embodiment
A single hook processing technology, order realizes according to the following steps:
1) by material, be that the bar of 4Cr14Ni14W2Mo stainless refractory steel cuts into the blank that is of a size of Φ 85mm * 430 mm.
Preferably cutting method is: the bar that is 4Cr14Ni14W2Mo stainless refractory steel by material is placed on unpowered horizontal feed Roller conveyor extending longitudinally, Roller conveyor the place ahead is provided with rear grip mechanism and the front clamp mechanism of passing for bar, rear grip mechanism and front clamp mechanism all can and unclamp under two kinds of active states of bar at clamping bar and switch, and front clamp mechanism the place ahead is provided with Direct Action Type travel switch.The nozzle of laser cutting machine cutting head is between front clamp mechanism and Direct Action Type travel switch, the fore-and-aft distance of nozzle and Direct Action Type travel switch is cutting length, longitudinal direction is that fore-and-aft direction is also the length direction of bar, nozzle transverse movement is to realize blanking, front clamp mechanism is near nozzle, and while guaranteeing blanking, bar is stable.Technology for blanking process is: rear grip mechanism clamps bar and proceeds to when bar front end touches Direct Action Type travel switch, and front clamp mechanism clamps bar, and rear grip mechanism unclamps bar and retreats reset, and cutting head cutting bar, completes cutting action one time.Then, rear grip mechanism clamps bar, bar unclamps in front clamp mechanism, rear grip mechanism drives bar to proceed to when bar front end touches Direct Action Type travel switch, and front clamp mechanism clamps bar, and rear grip mechanism unclamps bar and retreats reset, cutting head cutting bar, complete cutting action next time, so move in circles, complete blank blanking operation.Billet size Φ 85mm * 430 mm.
2) many blanks are deposited in heating furnace and are heated, 905 ℃ of blank charging temperatures, furnace temperature is incubated 85min after rising to 1170 ℃.It should be noted that, the insulation occurring herein all should be interpreted as keeping certain temperature.Then on punch press, make the curved shape of itself and single hook basically identical blank bending after heating, be convenient to forging below.With heating furnace, blocker is heated to 900 ℃, with heating furnace, finisher is heated to 900 ℃, can alleviate while forging because of blank and the forging die temperature difference is too large, heat loses in a large number and causes blank surface chilling, the phenomenon that plastic deformation resistance is high, surface quality is poor.
3) blocker adopts horizontal parting, and upper and lower mould is symmetrical, and 1140 ℃ of blocking temperature, carry out blocking.
4) finisher adopts horizontal parting, upper and lower mould is symmetrical, all has and link up the corresponding die cavity of single hook bend and extraneous Φ 2mm steam vent on upper die and lower die, and a port of steam vent is positioned at the corresponding die cavity of single hook bend bottom, 910 ℃ of final forging temperatures, carry out finish-forging.On finisher, there is steam vent, in finish-forging process, discharge die cavity inner high voltage gas, be beneficial to blank corresponding to single hook bend and be full of die cavity, solved single hook bend and caused more greatly this part to forge the problem that easily occurs defect because of cross sectional shape complexity and area of section.
5) forging is imbedded in ash cooling, length of embedment is greater than 40cm, to control slow cooling speed.Ash discharge when forging is cooled to 130 ℃, then air cooling is to room temperature.
6) adopt edger that unnecessary burr are removed.
7) many forging being deposited in to furnace temperature is to heat in the heating furnace of 800 ℃, and insulation 35min, then puts into straightening die and carry out thermal recalibration.It should be noted that, in heating furnace (annealing furnace), heating blank (forging) all refers to that many blanks (many forging) are deposited in heating in heating furnace (annealing furnace) herein, its temperature retention time is determined according to this stacking state, when heating furnace (annealing furnace) heats single-piece, temperature retention time will be stacked temperature retention time lower than many.For single hook forging herein, many should be 10-20 part.
8) forging is imbedded in ash cooling, length of embedment is greater than 40cm, when forging is cooled to 100 ℃, forging is taken out, and with abrasive brush, forging is removed to burr, removes burr comparatively easy in the time of 100 ℃.
9) put into gagging mould and carry out gagging, gagging mould adopts horizontal parting, and upper gagging mould and lower gagging mould are symmetrical.Gagging can obtain accurate forging ' s block dimension.
10) forging is deposited in annealing furnace, with stove, is slowly warming up to 830 ℃, programming rate is 10 ℃/min, be incubated 2.5 hours, then forging is put into 50 ℃ of flowing water and is cooled to 450 ℃, and the heating furnace of putting into temperature and be 450 ℃ is incubated 2 hours, then cools to room temperature with the furnace.Improve the cutting ability of forging, for follow-up machining is prepared.
11) carry out bead, the surface of strengthening forging.
12) lead plug axis hole, stomidium and elastic cylinder pin-and-hole, concrete operation is: the lower gagging mould shape of lower clamp and coupler body corresponding part is identical, upper fixture is identical with gagging mould shape on coupler body corresponding part, lower clamp and upper fixture clamp coupler body jointly, and the forging of clamping is in lying status.That is to say, upper fixture has the upper cavity adapting with coupler body, and lower clamp has the lower mode cavity adapting with coupler body.Forging right side has the right drill bit that size and pin shaft hole match, and forging left side has the left drill bit that size and stomidium match, and forging top has the vertically-arranged drill bit that size and elastic cylinder pin-and-hole match, left drill bit and right drill bit horizontal and be positioned on a horizontal line.Right drill bit is feed motion lead plug axis hole left, and after bearing pin hole drill is complete, stomidium is bored in the feed motion to the right of left drill bit, and elastic cylinder pin-and-hole is bored in the downward feed motion of vertically-arranged drill bit simultaneously.
13) by material, be that the wire rod (or being called pencil rod) of 4Cr14Ni14W2Mo stainless refractory steel cuts into the member isometric with bearing pin, finish turning member periphery and both ends of the surface, then become bearing pin by member chamfer machining on lathe.
14) bearing pin is packed in pin shaft hole, then elastic cylindrical pin is packed in elastic cylinder pin-and-hole, complete single hook processing.
Single hitcher of processing by above-mentioned operation has good elevated temperature strength and heat resistance, and corrosion resistance and non-oxidizability also better, adapt to and to work under higher temperature conditions, long service life.
In order to strengthen the toughness of single hook, after step 10), heat-treat, and then carry out step 11), heat treated concrete operation is: when heating furnace is warming up to 900 ℃, forging heap is put into heating furnace, when heating furnace is warming up to 1000 ℃, be incubated 2.5 days, then 1h is cooled to below 15 ℃, keeps 30min, be heated to 560 ℃ again and keep 70min, air cooling is to room temperature.Elevated temperature impact test draws, notched bar impact strength has improved 23-25%.
In single hook use procedure, at the bottom of hook, be one of topmost working position, use for a long time, at the bottom of hook, wearing and tearing are sunk, and cause single hook to be scrapped.In order to extend the service life of single hook, at the bottom of single hook hook, carry out Wear-resistant Treatment in advance, to extend the service life of single hook, reduce use cost.To carrying out Wear-resistant Treatment at the bottom of hook, and then carry out step 12) after step 11).The concrete operation of Wear-resistant Treatment is: first by immersing 20min in boiling water at the bottom of the hook of coupler body, carry out hot water wash, by immersing temperature at the bottom of the hook of coupler body, be then digestion 40min in the pickle of 80 ℃, flowing water is washed again, and then be digestion 20min in the pickle of 80 ℃ by immersing temperature at the bottom of the hook of coupler body, then carry out flowing water and wash and be dried.The temperature of pickle should remain unchanged, and pickle contains 18%H
2sO
4 , 6%HCl, 6%HNO
3 , all the other are water.The object of above-mentioned pickling is the surface oxide layer at the bottom of removal hook.
Dried many coupler bodies are preheated to 600 ℃ and be incubated 10min, then adopt RMD136 Mold Surfacing Electrode at the thick bottom of hook basal surface built-up welding 2.5-3mm; Then adopt RMD248 Mold Surfacing Electrode in the thick intermediate layer of bottom surface built-up welding 3mm; Then carry out postwelding tempering, 520 ℃ of temperature, insulation 3h, then air cooling is to room temperature; Finally adopt plasma gun at the diamond coatings of interlayer surfaces spraying one deck 2mm.
Bearing pin is one of topmost working position, and its middle part is that abrading section easily occurs, and after step 13), bearing pin is processed, and then is carried out step 14), and concrete operation is:
Finish turning bearing pin middle part makes bearing pin middle part form annular groove, the dark 6mm of annular groove.
When furnace temperature rises to 900 ℃, bearing pin heap is put into stove and heat, when furnace temperature rises to 1000 ℃, be incubated 20h, 50min cool to room temperature then, room temperature is placed 30min, then is heated to 560 ℃ and be incubated 50min, and air cooling is to room temperature;
Then by bearing pin hot water wash 20min in hot water storgae, then bearing pin is sunk in descaling bath, pickle temperature maintains 50 ℃, and in descaling bath, bearing pin checks once every 5min, until bearing pin surface scale removes completely, and then cold wash, dry.Pickle contains 5% hydrofluoric acid, 10% nitric acid, and all the other are water;
Dried bearing pin is preheated to 600 ℃ and be incubated 20min, then adopts RMD136 Mold Surfacing Electrode thick bottom of built-up welding 2mm on annular groove bottom land; Then adopt RMD248 Mold Surfacing Electrode in the thick intermediate layer of bottom surface built-up welding 2mm; Carry out again postwelding tempering, 520 ℃ of temperature, insulation 2h, then air cooling is to room temperature; Finally adopt plasma gun at the diamond coatings of interlayer surfaces spraying one deck 2mm.
Introduce another kind of bearing pin processing method below, after step 13), bearing pin is processed, and then carried out step 14), concrete operation is:
Finish turning bearing pin middle part makes bearing pin middle part form annular groove, the dark 6mm of annular groove.
When furnace temperature is 900 ℃, bearing pin heap is put into stove and heat, when furnace temperature rises to 1000 ℃, be incubated 20h, 50min cool to room temperature then, room temperature is placed 30min, then is heated to 560 ℃ of insulation 50min, and air cooling is to room temperature.
Then by bearing pin hot water wash 20min in hot water storgae, be dried to bearing pin surface anhydrous (if bearing pin surface band water drops into alkali wash water, there is quick-fried spattering, easily hurt sb.'s feelings), put into alkaline bath digestion 20min, alkali wash water temperature maintains 90 ℃, the bearing pin taking out from alkaline bath is dropped into rapidly to flowing water the gutter channel below 10 ℃ to be washed, then bearing pin is immersed to temperature and is digestion 20min in the pickle of 80 ℃, flowing water is washed again, and then bearing pin is immersed to temperature is digestion 20min in the pickle of 80 ℃, then carries out flowing water and wash and be dried; Alkali wash water contains 13% NaOH, 10% sodium nitrate, and all the other are water; Pickle contains 18%H
2sO
4 , 6%HCl, 6%HNO
3 , all the other are water;
Dried bearing pin is preheated to 600 ℃ and be incubated 20min, then adopts RMD136 Mold Surfacing Electrode thick bottom of built-up welding 2mm on annular groove bottom land; Then adopt RMD248 Mold Surfacing Electrode in the thick intermediate layer of bottom surface built-up welding 2mm; Carry out again postwelding tempering, 520 ℃ of temperature, insulation 2h, then air cooling is to room temperature; Finally adopt plasma gun at the diamond coatings of interlayer surfaces spraying one deck 2mm.
Particularly, bearing pin groove groove width equals the spacing of the neck of hook two yokes.
Claims (5)
1. a single hook processing technology, is characterized in that, order realizes according to the following steps:
1) by material, be that the bar of 4Cr14Ni14W2Mo stainless refractory steel is placed on unpowered horizontal feed Roller conveyor extending longitudinally, Roller conveyor the place ahead is provided with rear grip mechanism and the front clamp mechanism of passing for bar, rear grip mechanism and front clamp mechanism all can and unclamp under two kinds of active states of bar at clamping bar and switch, front clamp mechanism the place ahead is provided with Direct Action Type travel switch, the nozzle of laser cutting machine cutting head is between front clamp mechanism and Direct Action Type travel switch, the fore-and-aft distance of nozzle and Direct Action Type travel switch is cutting length, front clamp mechanism is near nozzle, rear grip mechanism clamps bar and proceeds to when bar front end touches Direct Action Type travel switch, front clamp mechanism clamps bar, rear grip mechanism unclamps bar and retreats reset, cutting head cutting bar, complete cutting action one time, then, rear grip mechanism clamps bar, bar unclamps in front clamp mechanism, rear grip mechanism drives bar to proceed to when bar front end touches Direct Action Type travel switch, front clamp mechanism clamps bar, rear grip mechanism unclamps bar and retreats reset, cutting head cutting bar, complete cutting action next time, so move in circles, complete blank blanking operation, billet size Φ 85mm * 430 mm,
2) many blanks are deposited in heating furnace and are heated, 905 ℃ of blank charging temperatures, furnace temperature is incubated 85min after rising to 1170 ℃; On punch press, make the curved shape of itself and single hook basically identical blank bending after heating; With heating furnace, blocker is heated to 900 ℃; With heating furnace, finisher is heated to 900 ℃;
3) blocker adopts horizontal parting, and upper and lower mould is symmetrical, and 1140 ℃ of blocking temperature, carry out blocking;
4) finisher adopts horizontal parting, upper and lower mould is symmetrical, all has and link up the corresponding die cavity of single hook bend and extraneous Φ 2mm steam vent on upper die and lower die, and a port of steam vent is positioned at the corresponding die cavity of single hook bend bottom, 910 ℃ of final forging temperatures, carry out finish-forging;
5) forging is imbedded in ash cooling, length of embedment is greater than 40cm, ash discharge when forging is cooled to 130 ℃, and then air cooling is to room temperature;
6) adopt edger that unnecessary burr are removed;
7) many forging being deposited in to furnace temperature is to heat in the heating furnace of 800 ℃, insulation 35min; Then put into straightening die and carry out thermal recalibration;
8) forging is imbedded in ash cooling, length of embedment is greater than 40cm, when forging is cooled to 100 ℃, forging is taken out, and with abrasive brush, forging is removed to burr;
9) put into gagging mould and carry out gagging, gagging mould adopts horizontal parting, and upper gagging mould and lower gagging mould are symmetrical;
10) forging is deposited in annealing furnace, with stove, is slowly warming up to 830 ℃, programming rate is 10 ℃/min, is incubated 2.5 hours, and then forging is put into 50 ℃ of flowing water and is cooled to 450 ℃, and the heating furnace of putting into 450 ℃ is incubated 2 hours, then cools to room temperature with the furnace;
11) carry out bead;
12) lead plug axis hole, stomidium and elastic cylinder pin-and-hole: the lower gagging mould shape of lower clamp and coupler body corresponding part is identical, upper fixture is identical with gagging mould shape on coupler body corresponding part, lower clamp and upper fixture clamp coupler body jointly, and the forging of clamping is in lying status; Forging right side has the right drill bit that size and pin shaft hole match, on the left of forging, there is the left drill bit that size and stomidium match, above forging, there is the vertically-arranged drill bit that size and elastic cylinder pin-and-hole match, left drill bit and right drill bit horizontal and be positioned on a horizontal line, right drill bit is feed motion lead plug axis hole left, after bearing pin hole drill is complete, stomidium is bored in the feed motion to the right of left drill bit, and elastic cylinder pin-and-hole is bored in the downward feed motion of vertically-arranged drill bit simultaneously;
13) by material, be that the wire rod of 4Cr14Ni14W2Mo stainless refractory steel cuts into the member isometric with bearing pin, finish turning member periphery and both ends of the surface, then become bearing pin by member chamfer machining on lathe;
14) bearing pin is packed in pin shaft hole, then elastic cylindrical pin is packed in elastic cylinder pin-and-hole, complete single hook processing.
2. single hook processing technology according to claim 1, is characterized in that: after step 10), heat-treat, and then carry out step 11); Heat treated concrete operation is:
When heating furnace is warming up to 900 ℃, forging heap is put into heating furnace, when heating furnace is warming up to 1000 ℃, be incubated 2.5 days, then 1h is cooled to below 15 ℃, keeps 30min, then is heated to 560 ℃ of maintenance 70min, and air cooling is to room temperature.
3. single hook processing technology according to claim 1, is characterized in that: after step 11), to carrying out Wear-resistant Treatment at the bottom of hook, and then carry out step 12);
The concrete operation of Wear-resistant Treatment is: first by immersing 20min in boiling water at the bottom of the hook of coupler body, carry out hot water wash, by immersing temperature at the bottom of the hook of coupler body, be then digestion 40min in the pickle of 80 ℃, flowing water is washed again, and then be digestion 20min in the pickle of 80 ℃ by immersing temperature at the bottom of the hook of coupler body, then carry out flowing water and wash and be dried; Pickle contains 18%H
2sO
4 , 6%HCl, 6%HNO
3 , all the other are water;
Dried coupler body is preheated to 600 ℃ and be incubated 10min, then adopts RMD136 Mold Surfacing Electrode at the thick bottom of hook basal surface built-up welding 2.5-3mm; Then adopt RMD248 Mold Surfacing Electrode in the thick intermediate layer of bottom surface built-up welding 3mm; Then carry out postwelding tempering, 520 ℃ of temperature, insulation 3h, then air cooling is to room temperature; Then adopt plasma gun at the diamond coatings of interlayer surfaces spraying one deck 2mm.
4. single hook processing technology according to claim 1, is characterized in that: after step 13), bearing pin is processed, and then carried out step 14);
Concrete operation is:
Finish turning bearing pin middle part makes bearing pin middle part form annular groove, the dark 6mm of annular groove;
When furnace temperature rises to 900 ℃, bearing pin heap is put into stove and heat, when furnace temperature rises to 1000 ℃, be incubated 20h, 50min cool to room temperature then, room temperature is placed 30min, then is heated to 560 ℃ and be incubated 50min, and air cooling is to room temperature;
Then by bearing pin hot water wash 20min in hot water storgae, then bearing pin is sunk in descaling bath, pickle temperature maintains 50 ℃, and in descaling bath, bearing pin checks once every 5min, until bearing pin surface scale removes completely, and then cold wash, dry; Pickle contains 5% hydrofluoric acid, 10% nitric acid, and all the other are water;
Dried bearing pin is preheated to 600 ℃ and be incubated 20min, then adopts RMD136 Mold Surfacing Electrode thick bottom of built-up welding 2mm on annular groove bottom land; Then adopt RMD248 Mold Surfacing Electrode in the thick intermediate layer of bottom surface built-up welding 2mm; Carry out again postwelding tempering, 520 ℃ of temperature, insulation 2h, then air cooling is to room temperature; Then adopt plasma gun at the diamond coatings of interlayer surfaces spraying one deck 2mm.
5. single hook processing technology according to claim 1, is characterized in that: after step 13), bearing pin is processed, and then carried out step 14);
Concrete operation is:
Finish turning bearing pin middle part makes bearing pin middle part form annular groove, the dark 6mm of annular groove;
When furnace temperature is 900 ℃, bearing pin heap is put into stove and heat, when furnace temperature rises to 1000 ℃, be incubated 20h, 50min cool to room temperature then, room temperature is placed 30min, then is heated to 560 ℃ of insulation 50min, and air cooling is to room temperature;
Then by bearing pin hot water wash 20min in hot water storgae, be dried to bearing pin surface anhydrous, put into alkaline bath digestion 20min, alkali wash water temperature maintains 90 ℃, the bearing pin taking out from alkaline bath is dropped into rapidly to flowing water the gutter channel 10 ℃ below and wash, follow that bearing pin is immersed to temperature is digestion 20min in the pickle of 80 ℃, then flowing water is washed, and then bearing pin is immersed to temperature is digestion 20min in the pickle of 80 ℃, then carries out flowing water and wash and be dried; Alkali wash water contains 13% NaOH, 10% sodium nitrate, and all the other are water; Pickle contains 18%H
2sO
4 , 6%HCl, 6%HNO
3 , all the other are water;
Dried bearing pin is preheated to 600 ℃ and be incubated 20min, then adopts RMD136 Mold Surfacing Electrode thick bottom of built-up welding 2mm on annular groove bottom land; Then adopt RMD248 Mold Surfacing Electrode in the thick intermediate layer of bottom surface built-up welding 2mm; Carry out again postwelding tempering, 520 ℃ of temperature, insulation 2h, then air cooling is to room temperature; Then adopt plasma gun at the diamond coatings of interlayer surfaces spraying one deck 2mm.
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| CN104191179A (en) * | 2014-09-11 | 2014-12-10 | 河南华北起重吊钩有限公司 | Process for quickly forming double-hook lifting hooks of cranes by means of die forging |
| CN105921673A (en) * | 2016-06-02 | 2016-09-07 | 鞍钢重型机械有限责任公司 | Method for forging hook forged piece |
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| DE3229044C2 (en) * | 1981-10-28 | 1992-01-09 | Metallifacture Ltd., Redhill, Nottingham, Gb | |
| CN201284184Y (en) * | 2008-05-01 | 2009-08-05 | 山东神力索具有限公司 | Hook rigging |
| CN101648333A (en) * | 2009-06-26 | 2010-02-17 | 上海重型机械工程成套有限公司 | Manufacturing method of large-tonnage combined lifting hook |
| CN102556837A (en) * | 2011-12-28 | 2012-07-11 | 哈尔滨正晨焊接切割设备制造有限公司 | Lifting hook manufactured by adopting large-thickness fine-cutting technology and large-section friction welding method |
| CN103084786A (en) * | 2011-10-29 | 2013-05-08 | 招远云帆五金机械有限公司 | Manufacturing and assembling process for fork hook |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090053045A1 (en) * | 2007-08-22 | 2009-02-26 | General Electric Company | Turbine Shroud for Gas Turbine Assemblies and Processes for Forming the Shroud |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3229044C2 (en) * | 1981-10-28 | 1992-01-09 | Metallifacture Ltd., Redhill, Nottingham, Gb | |
| CN201284184Y (en) * | 2008-05-01 | 2009-08-05 | 山东神力索具有限公司 | Hook rigging |
| CN101648333A (en) * | 2009-06-26 | 2010-02-17 | 上海重型机械工程成套有限公司 | Manufacturing method of large-tonnage combined lifting hook |
| CN103084786A (en) * | 2011-10-29 | 2013-05-08 | 招远云帆五金机械有限公司 | Manufacturing and assembling process for fork hook |
| CN102556837A (en) * | 2011-12-28 | 2012-07-11 | 哈尔滨正晨焊接切割设备制造有限公司 | Lifting hook manufactured by adopting large-thickness fine-cutting technology and large-section friction welding method |
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Denomination of invention: Single hook processing technology Effective date of registration: 20230821 Granted publication date: 20140813 Pledgee: The Bank of Jining Limited by Share Ltd. Guang River Road Branch Pledgor: SHANDONG SHENLI RIGGING Co.,Ltd. Registration number: Y2023980053027 |