CN115338607A - Machining process of gear of coal mining machine - Google Patents
Machining process of gear of coal mining machine Download PDFInfo
- Publication number
- CN115338607A CN115338607A CN202210988529.3A CN202210988529A CN115338607A CN 115338607 A CN115338607 A CN 115338607A CN 202210988529 A CN202210988529 A CN 202210988529A CN 115338607 A CN115338607 A CN 115338607A
- Authority
- CN
- China
- Prior art keywords
- gear
- coal mining
- forging
- machining process
- mining machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003754 machining Methods 0.000 title claims abstract description 49
- 239000003245 coal Substances 0.000 title claims abstract description 46
- 238000005065 mining Methods 0.000 title claims abstract description 32
- 238000005242 forging Methods 0.000 claims abstract description 71
- 238000012545 processing Methods 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000007797 corrosion Effects 0.000 claims abstract description 5
- 238000005260 corrosion Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims abstract description 4
- 238000004925 denaturation Methods 0.000 claims abstract description 4
- 230000036425 denaturation Effects 0.000 claims abstract description 4
- 238000004321 preservation Methods 0.000 claims abstract description 4
- 238000010791 quenching Methods 0.000 claims description 26
- 230000000171 quenching effect Effects 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000005520 cutting process Methods 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000009713 electroplating Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 9
- 238000007747 plating Methods 0.000 claims description 9
- 238000005496 tempering Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000007514 turning Methods 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 206010006514 bruxism Diseases 0.000 description 6
- 238000004080 punching Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention discloses a machining process of a gear of a coal mining machine, which comprises the following steps: when the gear is prepared, the metal cast ingot is heated to 570-600 ℃, the plasticity of the metal cast ingot is improved, the denaturation resistance is reduced, the heated forging blank is stamped, forged and cast, the specification of the metal blank tends to the set specification of a drawing, the processing performance of the metal cast ingot is improved, the forging and casting can be converted into a proper size for subsequent processing by forging the cast ingot, the forging blank is heated to 30-50 ℃ above the critical temperature of the forging blank after being finished, heat preservation is carried out for 1-3 hours, the structural strength of the gear is further improved by matching the processing process steps in the invention, the contact fatigue and bending fatigue resistance of the gear is increased, the corrosion resistance of the gear is increased, the service life of the gear is prolonged, and the capability of the processing technology for improving the strength of the gear is realized.
Description
Technical Field
The invention relates to the technical field of preparation equipment of activated carbon, in particular to a processing technology of a gear of a coal mining machine.
Background
The coal mining machine is one of main devices of fully-mechanized complete equipment, is developed and evolved from a coal cutter mostly, is a large-scale complex system integrating machinery, electricity and hydraulic pressure into a whole, can reduce physical labor and improve safety through mechanized coal mining of the coal mining machine, achieves the purposes of high yield, high efficiency and low consumption, breaks and falls coal from a coal body (breaking coal) by a working mechanism on a longwall coal mining working face and is installed into a coal mining machine of a working face conveyor (loading coal), and is used for a common medium-sized and small-sized underground slowly-inclined thin coal seam and an ultra-thin composite coal seam coal mining working face to cut bottom slots, so as to achieve the effect of cutting and dropping coal. The coal mining machine has the advantages of small volume, light weight, low noise, good dustproof effect and safe and reliable use, the electric appliance part has certain explosion-proof performance, the motor cooling mode is water cooling, the coal block rate can be improved compared with manual coal mining, the mining time is saved, the coal mining machine is equipment for mining ultra-thin composite coal seams instead of manual coal cutting and coal dropping, the coal mining machine runs (pulls) at a set pulling speed, the coal breaking and coal loading processes can continuously carry out severe working environment, if a fault occurs, the whole coal mining work can be interrupted, huge economic loss is caused, the gear is an important structural part in the coal mining machine, the gear refers to a mechanical element with a gear on a rim, the gear is continuously meshed with the gear to transmit motion and power, the gear is applied early in transmission, the end of 19 th century, the principle of the developed cutting method and the sequential appearance of a special machine tool and a cutter utilizing the principle to cut teeth, and along with the development of production, the operational stability of the gear is emphasized.
The types of gears can be classified into the following categories: the transmission ratio, the relative position of the wheel shaft and the manufacturing process are as follows: fixing transmission ratio and changing transmission ratio; relative position of wheel axle: a plane gear mechanism, straight toothed spur gear transmission, external meshing gear transmission, internal meshing gear transmission and the like; the manufacturing process comprises the following steps: the steel commonly used for manufacturing the gears comprises quenched and tempered steel, quenched steel, carburized and quenched steel and nitriding steel, and the strength of the cast steel is slightly lower than that of the forged steel and is commonly used for the gears with larger size; the gray cast iron has poor mechanical property and can be used in open gear transmission of light load; the nodular cast iron can partially replace steel to manufacture gears; plastic gears are mostly used in places with light load and low noise requirements, and the gears matched with the plastic gears are generally steel gears with good heat conductivity.
However, the existing treatment equipment has the following defects:
the coal cutter gear machining process such as CN102837165B is found in daily production, the strength of the gear is improved by the existing production process mostly depending on heat treatment, and in the heat treatment process, heat treatment steps are continuously carried out, so that the deformation generated in the subsequent machining process of the gear is difficult to correct, and the finished product yield of the gear in the production process is reduced.
We have therefore proposed a process for machining a gear for a coal mining machine in order to solve the problems set out above.
Disclosure of Invention
The invention aims to provide a machining process of a coal cutter gear, which is characterized in that the steps of the machining process are matched, so that the structural strength of the gear is further improved, the contact fatigue resistance and bending fatigue resistance of the gear are improved, the corrosion resistance of the gear is improved, the service life of the gear is prolonged, the capability of the machining process for improving the strength of the gear is realized, and the problems of the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a machining process of a gear of a coal mining machine comprises the following steps:
when the gear is prepared, the metal cast ingot is heated to 570-600 ℃, the plasticity of the metal cast ingot is improved, the denaturation resistance is reduced, the heated forging stock is punched, forged and cast, the specification of the metal blank tends to the set specification of a drawing, the processing performance of the metal cast ingot is improved, and the casting and forging can be converted into a proper size for subsequent processing by forging the cast ingot;
after the forging stock is finished, heating the forging stock to 30-50 ℃ above the critical temperature of the forging stock, carrying out heat preservation for 1-3 hours, taking out the forging stock, and cooling by spraying water or blowing air in the air to improve the plasticity of the forging stock, carrying out pretreatment on subsequent processing, and improving the cooling speed of the forging stock by spraying water or blowing air;
after the forging stock is normalized, fixing the forging stock on a numerical control machine tool, guiding drawing paper into the numerical control machine tool, turning the forging stock by the numerical control machine tool according to the specification of the guided drawing, and finely processing the inner hole, the outer diameter of the end face shaft and other parts of the gear, so that the forging stock is converted into the gear, the specification precision of the gear is accurate, and the processing specification of the gear can be limited by guiding the drawing;
after the gear is formed, quenching the gear, heating the gear to a temperature 30-50 ℃ above the critical temperature Ac 3-Ac 1, preserving the heat for 2-3 hours, taking out the gear, and rapidly cooling the gear at a speed higher than the critical cooling speed to convert the gear into martensite, wherein the rigidity, the hardness and the toughness of the gear can be improved through quenching;
after gear quenching is finished, heating the gear again to ensure that the temperature of the gear reaches a proper temperature lower than the lower critical temperature Ac1, preserving the heat for 30-50 minutes, standing and cooling in the air to be matched with the quenching treatment, eliminating the residual stress of the workpiece during quenching, and assisting the quenching through tempering so as to stabilize the structure and the size of the gear and ensure the precision of the gear;
after the heat treatment of tempering is finished on the gear, the gear is fixed on a numerical control machine again, finish machining is carried out on the gear again, so that the deformation of the gear generated in the heat treatment process can be corrected, the precision and the smoothness of the gear are further improved, the gear reaches the specification of a drawing, the specification of the gear can be further corrected through the finish machining, and the finished product qualification rate of the gear is improved;
after the gear is corrected, the grinding teeth of the gear are chamfered by the numerical control machine tool, so that the grinding teeth of the gear are converted into round corners, sharp corners and edge angles, and after chamfering is finished, the grinding teeth are subjected to deburring and other treatment, so that the gear is more easily meshed, the meshing performance of the gear can be improved through the processing of the tooth end, and the meshing of the gear is smoother;
after the whole machining of the gear is completed, the gear is placed in an electroplating machine, the electroplating machine is electrified to work, the surface of the gear is subjected to chrome plating, the corrosion resistance of the gear is improved, the appearance strength of the gear is improved through electroplating treatment, the stability of the gear is enhanced, during gear machining, an ingot is heated to a preset machining temperature, the ingot is taken out and is punched through punching equipment, the specification of the ingot reaches a proper machining size, after a forging blank is completed, normalizing treatment is performed on the forging blank, the plasticity of metal is improved, the subsequent machining of the forging blank is facilitated, when the forging blank is cooled to room temperature, a drawing is guided into a numerical control machine, the forging blank is fixed to the numerical control machine, the forging blank is machined into a gear shape through the numerical control machine, after the gear is machined, quenching and tempering are performed on the gear, the structural strength of the gear is enhanced, after the heat treatment is completed, the gear is fixed in the numerical control machine again, the precision of the gear is improved, meanwhile, chamfering treatment is performed on the gear tooth end, the gear end of the gear is molded, after the machining of the gear is completed, the gear, the surface of the gear is placed in the electroplating machine, the gear, the fault machining process is improved, the service life of the gear, and the gear is prolonged.
Preferably, the critical temperature of the forging stock in the step 2 is 600-630 ℃.
Preferably, the cutting numerical value in the step 3 needs to be cut according to the requirements of a drawing, the cutting position needs to be cooled by means of a water source in the cutting process, meanwhile, chips generated by cutting are intensively processed by a collecting mechanism in a machine tool, gear machining is carried out, the cast ingot is heated to a preset machining temperature, then the cast ingot is taken out and punched by punching equipment, the specification of the cast ingot reaches a proper machining size, after a forging blank is completed, normalizing is carried out on the forging blank, the plasticity of metal is improved, and therefore subsequent machining of the forging blank is facilitated.
Preferably, the cold treatment after quenching in the step 4 is carried out by using quenching oil as a cooling medium.
Preferably, the cold treatment in the step 5 is left for 1 to 1.5 hours.
Preferably, in the step 6, when the cutting is corrected, the cutting position is cooled by water flow, and the scraps are collected by a collecting mechanism of the machine tool.
Preferably, the chips generated by chamfering in the step 7 are intensively processed by a collecting mechanism of the machine tool.
Preferably, the step 8 is performed by washing with water for 15 to 20 minutes after completion of the chromium plating, and is performed by drying for 10 to 15 minutes after completion of the washing with water.
Preferably, sampling detection operation is carried out on the chrome-plated gear, unqualified products are screened out, and a sample library is established.
Preferably, the causes of the formation of rejects in the sample bank are analyzed and improved for subsequent production.
Compared with the prior art, the invention has the beneficial effects that:
the method comprises the steps of heating an ingot to a preset processing temperature during gear processing through multiple process steps, taking out the ingot and punching the ingot by a punching device, enabling the specification of the ingot to reach a proper processing size, normalizing the forged blank after finishing the forging blank, improving the plasticity of metal, facilitating the subsequent processing of the forged blank, guiding a gear drawing into a numerical control machine when the forged blank is cooled to room temperature, fixing the forged blank to the numerical control machine, processing the forged blank into a gear shape by the numerical control machine, quenching and tempering the gear after finishing the gear processing, enhancing the structural strength of the gear, fixing the gear in the numerical control machine again after finishing the heat treatment, correcting the gear by the numerical control machine to improve the precision of the gear, chamfering the gear tooth end by the numerical control machine to form the gear tooth end, placing the gear in an electroplating machine after finishing the processing, performing chrome plating on the gear surface, and improving the structural strength of the gear through the processing process of the method, reducing the fault probability of the gear and prolonging the service life of the gear.
Drawings
FIG. 1 is a schematic diagram of the process steps in the machining process of the coal mining machine gear of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a machining process of a gear of a coal mining machine comprises the following steps:
when the gear is prepared, the metal cast ingot is heated to 570-600 ℃, the plasticity of the metal cast ingot is improved, the denaturation resistance is reduced, the heated forging stock is punched, forged and cast, the specification of the metal blank tends to the set specification of a drawing, the processing performance of the metal cast ingot is improved, and the casting and forging can be converted into a proper size for subsequent processing by forging the cast ingot;
after the forging stock is finished, heating the forging stock to 30-50 ℃ above the critical temperature of the forging stock, carrying out heat preservation for 1-3 hours, taking out the forging stock, and cooling the forging stock by water spraying or air blowing in the air to improve the plasticity of the forging stock, carrying out pretreatment on subsequent processing, and improving the cooling speed of the forging stock by water spraying or air blowing;
after the forging stock is normalized, fixing the forging stock on a numerical control machine tool, guiding drawing paper into the numerical control machine tool, turning the forging stock by the numerical control machine tool according to the specification of the guided drawing, and performing finish machining on the inner hole, the outer diameter of an end face shaft and other parts of the gear to convert the forging stock into the gear, so that the specification and the precision of the gear are accurate, and the machining specification of the gear can be limited by guiding the drawing;
after the gear is formed, quenching the gear, heating the gear to a temperature which is 30-50 ℃ higher than a critical temperature Ac 3-Ac 1, preserving the heat for 2-3 hours, taking out the gear, and rapidly cooling the gear at a speed which is higher than the critical cooling speed to enable the gear to carry out martensite transformation, wherein the rigidity, the hardness and the toughness of the gear can be improved through quenching;
after gear quenching is finished, heating the gear again to ensure that the temperature of the gear reaches a proper temperature lower than the lower critical temperature Ac1, preserving the heat for 30-50 minutes, standing and cooling in the air to be matched with the quenching treatment, eliminating the residual stress of the workpiece during quenching, and assisting the quenching through tempering so as to stabilize the structure and the size of the gear and ensure the precision of the gear;
after the heat treatment of tempering is finished on the gear, the gear is fixed on the numerical control machine again, finish machining is carried out on the gear again, so that the deformation of the gear in the heat treatment process can be corrected, the precision and the smoothness of the gear are further improved, the specification of the gear can be further corrected through the finish machining, and the finished product qualified rate of the gear is improved;
after the gear is corrected, the grinding teeth of the gear are chamfered by the numerical control machine tool, so that the grinding teeth of the gear are converted into round corners, sharp corners and edge angles, and after chamfering is finished, the grinding teeth are subjected to deburring and other treatment, so that the gear is more easily meshed, the meshing performance of the gear can be improved through the processing of the tooth end, and the meshing of the gear is smoother;
after the whole machining of the gear is completed, the gear is placed in an electroplating machine, the electroplating machine is electrified to work, the surface of the gear is subjected to chrome plating, the corrosion resistance of the gear is improved, the appearance strength of the gear is improved through electroplating treatment, the stability of the gear is enhanced, during gear machining, an ingot is heated to a preset machining temperature, the ingot is taken out and is punched through punching equipment, the specification of the ingot reaches a proper machining size, after a forging blank is completed, normalizing treatment is performed on the forging blank, the plasticity of metal is improved, the subsequent machining of the forging blank is facilitated, when the forging blank is cooled to room temperature, a drawing is guided into a numerical control machine, the forging blank is fixed to the numerical control machine, the forging blank is machined into a gear shape through the numerical control machine, after the gear is machined, quenching and tempering are performed on the gear, the structural strength of the gear is enhanced, after the heat treatment is completed, the gear is fixed in the numerical control machine again, the precision of the gear is improved, meanwhile, chamfering treatment is performed on the gear tooth end, the gear end of the gear is molded, after the machining of the gear is completed, the gear, the surface of the gear is placed in the electroplating machine, the gear, the fault machining process is improved, the service life of the gear, and the gear is prolonged.
Specifically, the critical temperature of the forging stock in the step 2 is 600-630 ℃.
Specifically, the cutting numerical value in the step 3 needs to be cut according to the requirements of a drawing, the cutting position needs to be cooled by means of a water source in the cutting process, and meanwhile, chips generated by cutting are intensively processed by a collecting mechanism in a machine tool.
Specifically, the cooling treatment after quenching in step 4 is performed by using quenching oil as a cooling medium.
Specifically, the cold treatment in step 5 is left for 1 to 1.5 hours.
Specifically, during the correction cutting in the step 6, the cutting position needs to be cooled by means of water flow, the scraps are collected by a collecting mechanism of a machine tool, the ingot is heated to a preset processing temperature during gear processing, the ingot is taken out immediately and is stamped by a stamping device, the specification of the ingot reaches a proper processing size, after the forging blank is completed, the forging blank is subjected to normalizing treatment, the plasticity of metal is improved, and therefore the subsequent processing of the forging blank is facilitated, when the forging blank is cooled to room temperature, the gear is guided into the numerical control machine tool, then the forging blank is fixed to the numerical control machine tool, the forging blank is processed into a gear shape by the numerical control machine tool, after the gear processing is completed, the gear is subjected to quenching and tempering treatment, the structural strength of the gear is enhanced, after the heat treatment, the gear is fixed in the numerical control machine tool again, the precision of the gear is improved by correcting the numerical control machine tool, meanwhile, the gear tooth end of the gear can be formed by chamfering the numerical control machine tool, after the processing is completed, the gear is placed in an electroplating machine, the surface of the gear is processed, the structural strength of the gear is improved, the service life of the gear is prolonged, and the service life of the gear is prolonged.
Specifically, the chips generated by chamfering in step 7 are collectively processed by a collecting mechanism of the machine tool.
Specifically, after the chromium plating is completed in step 8, the chromium plating is washed for 15 to 20 minutes, and then dried for 10 to 15 minutes.
Specifically, sampling detection operation is required to be carried out on the chrome-plated gear, unqualified products are screened out, and a sample library is established.
Specifically, the reasons for the formation of defective products in the sample library are analyzed, and the subsequent production is improved.
The effect that its whole mechanism reached does: when the forging blank is cooled to room temperature, a gear drawing is guided into a numerical control machine tool, then the forging blank is fixed to the numerical control machine tool, the forging blank is processed into a gear shape through the numerical control machine tool, after the gear is processed, the gear is quenched and tempered to enhance the structural strength of the gear, after the heat treatment is completed, the gear is fixed in the numerical control machine tool again, the gear is corrected through the numerical control machine tool to improve the precision of the gear, meanwhile, the gear tooth end is chamfered through the numerical control machine tool to form the gear tooth end, after the processing is completed, the gear can be placed in an electroplating machine, and the chrome plating treatment is carried out on the surface of the gear.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A machining process of a gear of a coal mining machine comprises the following steps:
s1, when the gear is prepared, heating a metal cast ingot to 570-600 ℃, improving the plasticity of the metal cast ingot and reducing the denaturation resistance, and then stamping, forging and casting a heated forging blank to enable the specification of the metal blank to approach the set specification of a drawing and improve the processing performance of the metal cast ingot;
s2, after the forging stock is finished, heating the forging stock to 30-50 ℃ above the critical temperature of the forging stock, carrying out heat preservation for 1-3 hours, taking out the forging stock, spraying water or blowing air for cooling in the air to improve the plasticity of the forging stock, and carrying out pretreatment on subsequent processing;
and S3, after the forging stock is subjected to normalizing, fixing the forging stock on a numerical control machine tool, guiding drawing paper into the numerical control machine tool, turning the forging stock by the numerical control machine tool according to the guided drawing specification, and performing finish machining on the inner hole, the end face shaft outer diameter and the like of the gear, so that the forging stock is converted into the gear, and the specification precision of the gear is accurate.
S4, after the gear is formed, quenching the gear, heating the gear to a temperature which is 30-50 ℃ higher than the critical temperature Ac 3-Ac 1, preserving the heat for 2-3 hours, taking out the gear, and rapidly cooling the gear at a speed which is higher than the critical cooling speed to enable the gear to be subjected to martensite transformation;
s5, after gear quenching is finished, heating the gear again to enable the temperature of the gear to reach a proper temperature lower than the lower critical temperature Ac1, preserving the temperature for 30-50 minutes, standing in air for cooling, enabling the gear to be matched with the quenching treatment, and eliminating residual stress of the workpiece during quenching;
s6, after the gear is subjected to tempering heat treatment, re-fixing the gear on a numerical control machine tool, and performing finish machining on the gear again to correct the deformation of the gear generated in the heat treatment process, and further improving the precision and the smoothness of the gear to enable the gear to reach the specification of a drawing;
s7, after the gear is corrected, chamfering machining is conducted on the tooth of the gear through the numerical control machine tool, the tooth of the gear is converted into a round angle, a sharp angle and a corner angle, and after chamfering is completed, deburring and the like are conducted on the tooth, so that the gear is meshed more easily;
s8, after finishing all processing of the gear, placing the gear in an electroplating machine, electrifying the electroplating machine to work, and carrying out chromium plating on the surface of the gear, so that the corrosion resistance of the gear is improved.
2. The machining process of the gear of the coal mining machine according to claim 1, characterized in that: the critical temperature of the forging stock in the step 2 is 600-630 ℃.
3. The machining process of the gear of the coal mining machine according to claim 1, characterized in that: and (4) cutting the cutting numerical value in the step (3) according to the requirements of a drawing, cooling the cutting position by means of a water source in the cutting process, and simultaneously carrying out centralized treatment on chips generated by cutting by a collecting mechanism in the machine tool.
4. The machining process of the gear of the coal mining machine according to claim 1, characterized in that: and the cold treatment after quenching in the step 4 adopts quenching oil as a cooling medium for treatment.
5. The machining process of the gear of the coal mining machine according to claim 1, characterized in that: the cold treatment in the step 5 is placed for 1 to 1.5 hours.
6. The machining process of the gear of the coal mining machine according to claim 1, characterized in that: in the step 6, when the cutting is corrected, the cutting position needs to be cooled by water flow, and the chips are collected by a collecting mechanism of the machine tool.
7. The machining process of the gear of the coal mining machine according to claim 1, characterized in that: and (4) performing centralized treatment on the chips generated by chamfering in the step (7) by a collecting mechanism of the machine tool.
8. The machining process of the gear of the coal mining machine according to claim 1, characterized in that: in the step 8, after the chromium plating is finished, the water washing treatment is carried out for 15-20 minutes, and after the water washing is finished, the drying treatment is carried out for 10-15 minutes.
9. The machining process of the gear of the coal mining machine according to claim 1, characterized in that: and sampling detection operation is required to be carried out on the chrome-plated gear, unqualified products are screened out, and a sample library is established.
10. The machining process of the gear of the coal mining machine according to claim 1, characterized in that: and analyzing the reason for the formation of the defective products in the sample library, and improving the subsequent production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210988529.3A CN115338607B (en) | 2022-08-17 | 2022-08-17 | Processing technology of gear of coal mining machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210988529.3A CN115338607B (en) | 2022-08-17 | 2022-08-17 | Processing technology of gear of coal mining machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115338607A true CN115338607A (en) | 2022-11-15 |
| CN115338607B CN115338607B (en) | 2023-12-12 |
Family
ID=83952142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210988529.3A Active CN115338607B (en) | 2022-08-17 | 2022-08-17 | Processing technology of gear of coal mining machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115338607B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB454689A (en) * | 1935-09-10 | 1936-10-06 | William Frederick Rowden | Improvements in or relating to the manufacture of cast iron gear wheels and gear wheel blanks |
| CN102837165A (en) * | 2012-09-27 | 2012-12-26 | 常熟天地煤机装备有限公司 | Manufacturing method for final-stage driving gear of high-power coal mining machine |
| CN104999237A (en) * | 2014-08-14 | 2015-10-28 | 苏州优金金属成型科技有限公司 | Forging process for car spline shaft gear |
| CN108747244A (en) * | 2018-08-06 | 2018-11-06 | 合肥银泉铸造有限责任公司 | A kind of double hclical bevel gear's processing technology |
| CN108994553A (en) * | 2018-07-06 | 2018-12-14 | 宁波联合蓝光科技有限公司 | A kind of spur gear numerical-control processing method |
| CN114905235A (en) * | 2022-04-19 | 2022-08-16 | 杭州正元齿轮制造有限公司 | Forging forming process for triple gear |
-
2022
- 2022-08-17 CN CN202210988529.3A patent/CN115338607B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB454689A (en) * | 1935-09-10 | 1936-10-06 | William Frederick Rowden | Improvements in or relating to the manufacture of cast iron gear wheels and gear wheel blanks |
| CN102837165A (en) * | 2012-09-27 | 2012-12-26 | 常熟天地煤机装备有限公司 | Manufacturing method for final-stage driving gear of high-power coal mining machine |
| CN104999237A (en) * | 2014-08-14 | 2015-10-28 | 苏州优金金属成型科技有限公司 | Forging process for car spline shaft gear |
| CN108994553A (en) * | 2018-07-06 | 2018-12-14 | 宁波联合蓝光科技有限公司 | A kind of spur gear numerical-control processing method |
| CN108747244A (en) * | 2018-08-06 | 2018-11-06 | 合肥银泉铸造有限责任公司 | A kind of double hclical bevel gear's processing technology |
| CN114905235A (en) * | 2022-04-19 | 2022-08-16 | 杭州正元齿轮制造有限公司 | Forging forming process for triple gear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115338607B (en) | 2023-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20210346941A1 (en) | Novel hollow shaft manufacturing method | |
| CN103205668B (en) | The application in die handle and strand thick stick frame two ends handlebar of the QPQ salt bath compound process | |
| CN105643219A (en) | Machining technology for gear shaft | |
| CN104959794A (en) | Method for machining large inner gear ring of wind turbine gear box | |
| CN102873520B (en) | Process for machining marine gear | |
| CN103447784A (en) | Driving shaft processing technique | |
| CN107116347A (en) | A kind of processing technology of insertion axle | |
| CN103302464B (en) | Anti-fatigue manufacturing method of car transmission gear | |
| CN111842774A (en) | Outer hexagonal cross bolt machining process | |
| CN109837379B (en) | Heat treatment process for thin-wall flexible gear of harmonic reducer | |
| CN111300071A (en) | Production line for engineering machinery parts | |
| CN115338607A (en) | Machining process of gear of coal mining machine | |
| CN107263028A (en) | A kind of processing technology of Novel shaft class part machinery | |
| CN106378594A (en) | Preparing method for automobile chain wheel | |
| CN106425340A (en) | Non-traditional machining method of RV cycloid gear | |
| CN109352277A (en) | A kind of rust resistance and corrosion resistance high strength steel rack bolt processing technology | |
| CN111906224A (en) | Integrated machining method for hexagonal screw fastener | |
| CN203560387U (en) | Planetary gear shaft | |
| CN108723727B (en) | Rear brake caliper piston and processing method thereof | |
| CN105710619B (en) | A kind of cycloid gear low-cost high-efficiency processing method | |
| CN1095004A (en) | Method for producing sealing ring | |
| CN103331583B (en) | A kind of Caterpillar track hinge pin processing method | |
| CN103737020A (en) | Turning method of outer circle of turbine main steam regulating valve stem made of high temperature alloy GH901 | |
| CN107363481A (en) | A kind of cold-heading molding technique of rack bolt | |
| CN107557724A (en) | A kind of preparation method for improving float grease seal wearability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |