CN111022045A - Wear-resistant hidden type composite solid lubrication coal mining machine cutting tooth assembly and machining method - Google Patents
Wear-resistant hidden type composite solid lubrication coal mining machine cutting tooth assembly and machining method Download PDFInfo
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- CN111022045A CN111022045A CN201911366363.6A CN201911366363A CN111022045A CN 111022045 A CN111022045 A CN 111022045A CN 201911366363 A CN201911366363 A CN 201911366363A CN 111022045 A CN111022045 A CN 111022045A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 303
- 239000007787 solid Substances 0.000 title claims abstract description 64
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005461 lubrication Methods 0.000 title claims abstract description 14
- 238000003754 machining Methods 0.000 title claims description 12
- 239000003245 coal Substances 0.000 title abstract description 29
- 238000005065 mining Methods 0.000 title abstract description 23
- 239000000314 lubricant Substances 0.000 claims abstract description 56
- 238000005242 forging Methods 0.000 claims abstract description 53
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000004321 preservation Methods 0.000 claims abstract description 15
- 238000000137 annealing Methods 0.000 claims abstract description 11
- 238000005422 blasting Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims description 21
- 230000036346 tooth eruption Effects 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 238000005261 decarburization Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000005641 tunneling Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
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- Mining & Mineral Resources (AREA)
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- Geology (AREA)
- Forging (AREA)
Abstract
The invention provides a wear-resistant latent composite solid lubrication coal mining machine cutting pick assembly, which comprises a cutting pick, wherein the top of the cutting pick is a conical body, the bottom of the cutting pick is a cutting pick handle, and the cutting pick handle is a cylindrical body; the latent pit is filled with a composite latent solid lubricant; a method for processing a cutting pick assembly of a wear-resistant latent composite solid lubrication coal mining machine comprises the steps of S1, selecting raw materials for processing cutting picks; s2, blanking to obtain a bar; s3, shot blasting coating; s4, placing the cutting pick into a heating furnace, and preparing a cutting pick forging stock through a forming die; s5, processing an inner latent pit on the cut-off forging stock, and annealing; s6, placing the cutting pick forging stock in the composite latent solid lubricant; s7, processing the cutting tooth sleeve; s8, placing the obtained cutting pick sleeve in the composite latent solid lubricant for heat preservation; s9, coating the composite latent solid lubricant in an excessive manner during assembly; and S10, assembling. The technical problems that the existing cutting tooth and cutting tooth sleeve, the existing cutting tooth sleeve and cutting tooth seat are very seriously abraded and short in service life are solved.
Description
Technical Field
The invention relates to the technical field of coal mining machines, in particular to a cutting tooth assembly of a wear-resistant latent type composite solid lubrication coal mining machine and a processing method.
Background
The coal mining machine is a large complex system integrating machinery, electricity and hydraulic pressure, the working environment is severe, if a fault occurs, the whole coal mining work can be interrupted, and huge economic loss is caused.
The cutting pick of the coal mining machine relates to the tunneling process of all coal mines or rock geological structures. The cutting pick is one of the vulnerable parts in the coal mining and roadway tunneling machine, is a main tool for coal dropping and breaking, and the performance of the cutting pick directly influences the exertion of the production capacity of the coal mining machine, the power consumption, the working stability and the service life of other related parts.
The abrasion between the cutting teeth and the cutting tooth sleeve, and between the cutting tooth sleeve and the cutting tooth seat of the existing coal mining machine is very serious, and the service life is short. Especially in coal mining work, because the cutting pick, the tooth sleeve and the tooth holder need to rotate mutually to prolong the service life, but because the three parts are not lubricated and are in a dry grinding condition, experts say that pulverized coal can play a lubricating role, but because the pulverized coal and water sprayed by a cooling device easily form tar among the three parts, the three parts are locked and cannot rotate, and the abrasion among the three parts is accelerated, so that the improvement of the cutting pick is very necessary at present, and an improved cutting pick assembly is urgently needed to be matched with a coal mining machine for use.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a cutting tooth assembly of a wear-resistant latent type composite solid lubrication coal mining machine and a processing method thereof, and solves the technical problems that the existing cutting tooth and cutting tooth sleeve, the existing cutting tooth sleeve and cutting tooth seat are seriously worn and have short service life.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a wear-resistant latent composite solid lubricant shearer pick assembly, comprising:
the top of the cutting pick is a conical body, the bottom of the cutting pick is a cutting pick handle, and the cutting pick handle is a cylindrical body;
the cutting pick sleeve is sleeved with the cutting pick handle and is in running fit with the cutting pick handle, and a first clearance surface is arranged between the cutting pick sleeve and the cutting pick handle;
the cutting pick sleeve is arranged in the cutting pick seat, the cutting pick sleeve is in running fit with the cutting pick seat, a second clearance surface is arranged between the cutting pick seat and the cutting pick, the cutting pick sleeve and the cutting pick seat are coaxial in clearance;
at least one clearance surface of the first clearance surface and the second clearance surface is provided with a latent pit, and the latent pit is filled with the composite latent solid lubricant;
the cutting pick is manufactured by the following processing technology, and comprises the following steps:
s1, selecting 42Cr2Mo is a raw material for processing cutting teeth;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to be heated to 1100-1200 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging stock through a forming die;
s5, processing the latent pit on the stop forging stock, annealing, heating the cutting tooth forging stock to 800-900 ℃, preserving heat for 3-5 hours, cooling to 300-350 ℃ along with a furnace, discharging, and placing for air cooling;
s6, placing the obtained cutting pick forging stock in a composite latent solid lubricant at the temperature of 70-95 ℃ for heat preservation for 8-20 minutes, obtaining the cutting pick when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick for later use.
Furthermore, the bottom end of the cutting tooth handle is provided with a tensioning sleeve.
Furthermore, the hidden pit arranged on the first clearance surface is an inner hidden pit which is respectively positioned on the outer wall of the cutting pick handle and the outer wall of the tensioning sleeve.
Further, the hiding pits arranged on the second gap surface are outer hiding pits, and the outer hiding pits are located on the outer wall of the cutting tooth sleeve.
Furthermore, the inner latent pit and the outer latent pit are spiral grooves, the two spiral grooves are positioned on the outer wall of the cutting pick and the outer wall of the cutting pick sleeve, and a vertical communicating groove is formed between the adjacent grooves of the spiral grooves.
Further, the inner and outer latent pits are array hole groups.
Further, the inner and outer latent pits are uniformly spaced pits.
Furthermore, the conical body at the top of the cutting pick is processed into an anti-abrasion structural surface through a laser.
A machining method for a cutting pick assembly of a wear-resistant latent composite solid lubrication coal mining machine is characterized by comprising the following steps:
s1, selecting 42Cr2Mo is a raw material for processing cutting teeth;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to be heated to 1100-1200 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging stock through a forming die;
s5, processing the inner latent pit on the stop forging stock, annealing, heating the cutting tooth forging stock to 800-900 ℃, preserving heat for 3-5 hours, cooling to 300-350 ℃ along with a furnace, discharging, and placing air for cooling;
s6, placing the obtained cutting pick forging stock in a composite latent solid lubricant at 70-95 ℃ for heat preservation for 8-20 minutes, obtaining the cutting pick when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick for later use;
s7, processing the cutting pick sleeve, and processing the outer hidden pit on the cutting pick sleeve;
s8, placing the obtained cutting tooth sleeve in the composite latent solid lubricant at 70-95 ℃ for heat preservation for 8-20 minutes, and taking out the cutting tooth for later use when the temperature of the cutting tooth is reduced to room temperature;
s9, excessively coating the cutting teeth and the cutting tooth sleeve with the composite latent solid lubricant during assembly, so that the lubricant is preferably freely overflowed at a gap between the cutting teeth and the cutting tooth sleeve and a gap between the cutting tooth sleeve and the cutting seat;
s10, the assembly cutting pick, the cutting pick sleeve and the cutting pick seat are integrated.
(III) advantageous effects
The invention provides a wear-resistant hidden type composite solid lubrication cutting pick assembly of a coal mining machine and a processing method. Compared with the prior art, the method has the following beneficial effects:
the invention fills the waterproof, dustproof and long-acting composite solid lubricant special for GR cutting teeth in the latent pits between the cutting teeth and the cutting tooth sleeve and between the cutting tooth sleeve and the cutting tooth seat, so that the latent lubricating, self-circulating and self-sealing effects are formed, and the free rotation of the cutting teeth and the cutting tooth sleeve in the process of tunneling a coal cutting or rock geological structure is ensured. The invention prolongs the service life of the cutting pick in coal mining work, and realizes uniform abrasion of the cutting pick assembly in operation, so that the coal mining work is normal, stable and efficient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a cutting pick construction according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a gear sleeve according to an embodiment of the present invention;
FIG. 3 is a schematic view of an assembly structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of a cutting pick sleeve according to one embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the 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.
The embodiment of the application provides a wear-resistant latent composite solid lubrication coal mining machine cutting pick assembly and a machining method, and solves the technical problems that existing cutting picks and cutting pick sleeves, and cutting pick sleeves and cutting pick seats are extremely serious in wear and short in service life.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example 1: as shown in fig. 1-4, a wear-resistant latent composite solid lubricant shearer pick assembly comprises:
the cutting pick 100 is provided with a conical body at the top part of the cutting pick 100, a cutting pick handle 120 at the bottom part of the cutting pick 100 and a cylindrical body at the bottom part of the cutting pick handle 120;
the cutting pick sleeve 200 is sleeved on the cutting pick handle 120, the cutting pick sleeve 200 is in running fit with the cutting pick handle 120, and a first clearance surface is arranged between the cutting pick sleeve 200 and the cutting pick handle 120;
the cutting pick holder 300 is positioned in the cutting pick holder 300, the cutting pick holder is in running fit with the cutting pick sleeve 200, a second clearance surface is arranged between the cutting pick holder and the cutting pick 100, the cutting pick sleeve 200 and the cutting pick holder 300 are clearance coaxial bodies;
at least one clearance surface of the first clearance surface and the second clearance surface is provided with a latent pit, and the latent pit is filled with the composite latent solid lubricant 500;
the cutting pick 100 is manufactured by the following processing technology, and comprises the following steps:
s1, selecting 42Cr2Mo is a raw material for machining the cutting pick 100;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to be heated to 1100 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging blank through a forming die;
s5, processing the latent pit on the stop forging stock, annealing, heating the cutting tooth forging stock to 800 ℃, preserving heat for 3 hours, cooling to 300 ℃ along with a furnace, discharging, and placing air for cooling;
s6, placing the obtained cutting pick forging stock in 70 ℃ composite latent solid lubricant 500, preserving heat for 8 minutes, obtaining the cutting pick 100 when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick 100 for later use.
The bottom end of the pick shank 120 is provided with a tensioning sleeve 130. The first clearance surface is provided with an inner hidden pit 110, and the inner hidden pit 110 is respectively arranged on the outer wall of the cutting tooth handle 120 and the outer wall of the tensioning sleeve 130. The hidden pit arranged on the second clearance surface is an outer hidden pit 210, and the outer hidden pit 210 is positioned on the outer wall of the cutting pick sleeve 200.
The inner and outer latent pits 110 and 210 are spiral grooves 800, the two spiral grooves 800 are positioned on the outer wall of the cutting pick 100 and the outer wall of the cutting pick sleeve 200, and a vertical communication groove 700 is arranged between adjacent grooves of the spiral grooves 800. The spiral direction of the spiral groove of this embodiment is unanimous with the direction of rotation of pick cover 200 and pick holder 300, can be used to when pick cover 200 rotates, compound latent formula solid lubricant 500 in the spiral groove in with the pick outer wall drives to the spiral groove top, the intercommunication groove has been set up simultaneously, make compound latent formula solid lubricant 500 fall back, thereby when pick cover rotates with the pick, compound latent formula solid lubricant 500 forms endless return circuit, thereby can realize lubricated to the rotation of pick 100 and pick cover 200, pick cover 200 is also so with pick holder 300, compound latent formula solid lubricant 500 in the spiral groove 800 on the pick cover 200 also forms the circulation, make pick cover 200 and pick holder 300 rotate the smoothness. The upper and lower communication grooves 700 in this embodiment may be the same vertical line or may be spaced apart, see fig. 4.
The conical body at the top of the cutting pick 100 is processed into an anti-abrasion structural surface by a laser.
A machining method of a cutting pick assembly of a wear-resistant latent type composite solid lubrication coal mining machine comprises the following steps:
s1, selecting 42Cr2Mo is a raw material for machining the cutting pick 100;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to be heated to 1100 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging blank through a forming die;
s5, processing the inner hidden pit 110 on the stop forging stock, annealing, heating the cutting tooth forging stock to 800 ℃, preserving heat for 3 hours, cooling to 300 ℃ along with the furnace, discharging, and placing air for cooling;
s6, placing the obtained cutting pick forging stock in 70 ℃ composite latent solid lubricant 500, preserving heat for 8 minutes, obtaining the cutting pick 100 when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick 100 for later use;
s7, processing the pick sleeve 200, and processing the outer hidden pit 210 on the pick sleeve 200;
s8, placing the cutting pick sleeve 200 in the composite latent solid lubricant 500 at 70 ℃ for heat preservation for 8 minutes, and taking out the cutting pick 100 for later use when the cutting pick 100 is cooled to room temperature;
s9, coating the compound latent solid lubricant 500 on the cutting pick 100 and the cutting pick sleeve 200 in excess during assembly, so that the lubricant 500 can freely overflow from the gap between the cutting pick 100 and the cutting pick sleeve 200 and the gap between the cutting pick sleeve 200 and the cutting block 300;
s10, the assembly pick 100, the pick sleeve 200 and the pick holder 300 are integrated.
Example 2: as shown in fig. 1-4, a wear-resistant latent composite solid lubricant shearer pick assembly comprises:
the cutting pick 100 is provided with a conical body at the top part of the cutting pick 100, a cutting pick handle 120 at the bottom part of the cutting pick 100 and a cylindrical body at the bottom part of the cutting pick handle 120;
the cutting pick sleeve 200 is sleeved on the cutting pick handle 120, the cutting pick sleeve 200 is in running fit with the cutting pick handle 120, and a first clearance surface is arranged between the cutting pick sleeve 200 and the cutting pick handle 120;
the cutting pick seat 300 is positioned in the cutting pick seat 300, the cutting pick seat is in running fit with the cutting pick sleeve 200, a second clearance surface is arranged between the cutting pick seat and the cutting pick 100, and the cutting pick, the cutting pick sleeve 200 and the cutting pick seat 300 are coaxial bodies of clearance;
at least one clearance surface of the first clearance surface and the second clearance surface is provided with a latent pit, and the latent pit is filled with the composite latent solid lubricant 500;
the cutting pick is manufactured by the following processing technology, and comprises the following steps:
s1, selecting 42Cr2Mo is a raw material for processing cutting teeth;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to be heated to 1200 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging blank through a forming die;
s5, processing the latent pit on the stop forging stock, annealing, heating the cutting tooth forging stock to 900 ℃, preserving heat for 5 hours, cooling to 350 ℃ along with the furnace, discharging, and placing air for cooling;
s6, placing the obtained cutting pick forging stock in a composite latent solid lubricant 500 at 95 ℃ for heat preservation for 20 minutes, obtaining the cutting pick when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick for later use;
s7, processing the cutting pick sleeve 200, and processing the latent pit on the cutting pick sleeve 200;
s8, placing the cutting pick sleeve 200 in the composite latent solid lubricant 500 at 95 ℃ for heat preservation for 20 minutes, and taking out the cutting pick for later use when the temperature of the cutting pick is reduced to room temperature.
The bottom end of the pick shank 120 is provided with a tensioning sleeve 130. The first clearance surface is provided with an inner hidden pit 110, and the inner hidden pit 110 is respectively arranged on the outer wall of the cutting tooth handle 120 and the outer wall of the tensioning sleeve 130. The hidden pit arranged on the second clearance surface is an outer hidden pit 210, and the outer hidden pit 210 is positioned on the outer wall of the cutting pick sleeve 200. The inner latent pit 110 and the outer latent pit 210 are array hole groups 400.
The conical body at the top of the cutting pick is processed into an anti-abrasion structural surface through a laser.
A machining method of a cutting pick assembly of a wear-resistant latent type composite solid lubrication coal mining machine comprises the following steps:
s1, selecting 42Cr2Mo is a raw material for processing cutting teeth;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to be heated to 1200 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging blank through a forming die;
s5, processing the inner hidden pit 110 on the stop forging stock, annealing, heating the cutting tooth forging stock to 900 ℃, preserving heat for 5 hours, furnace-cooling to 350 ℃, discharging, and placing air for cooling;
s6, placing the obtained cutting pick forging stock in a composite latent solid lubricant 500 at 95 ℃ for heat preservation for 20 minutes, obtaining the cutting pick when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick for later use;
s7, processing the pick sleeve 200, and processing the outer hidden pit 210 on the pick sleeve 200;
s8, placing the obtained cutting pick sleeve 200 in the 95 ℃ composite latent solid lubricant 500 for heat preservation for 20 minutes, and taking out the cutting pick for later use when the cutting pick is cooled to room temperature;
s9, coating the compound latent solid lubricant 500 on the cutting pick and the cutting pick sleeve 200 in excess during assembly, so that the lubricant 500 can freely overflow from the gap between the cutting pick and the cutting pick sleeve 200 and the gap between the cutting pick sleeve 200 and the cutting pick seat 300;
s10, the assembly pick, the pick sleeve 200 and the pick holder 300 are integrated.
Example 3, as shown in fig. 1-4, a wear resistant latent composite solid lubricant shearer pick assembly, comprising:
the top of the cutting pick is a conical body, the bottom of the cutting pick is a cutting pick handle 120, and the cutting pick handle 120 is a cylindrical body;
the cutting pick sleeve 200 is sleeved on the cutting pick handle 120, the cutting pick sleeve 200 is in running fit with the cutting pick handle 120, and a first clearance surface is arranged between the cutting pick sleeve 200 and the cutting pick handle 120;
the cutting pick holder 300 is positioned in the cutting pick holder 300, the cutting pick holder is in running fit with the cutting pick sleeve 200, a second clearance surface is arranged between the cutting pick holder and the cutting pick 100, the cutting pick sleeve 200 and the cutting pick holder 300 are clearance coaxial bodies;
at least one clearance surface of the first clearance surface and the second clearance surface is provided with a latent pit, and the latent pit is filled with the composite latent solid lubricant 500;
the cutting pick 100 is manufactured by the following processing technology, and comprises the following steps:
s1, selecting 42Cr2Mo is a raw material for machining the cutting pick 100;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to heat to 1150 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging blank through a forming die;
s5, processing the latent pit on the stop forging stock, annealing, heating the cutting tooth forging stock to 850 ℃, preserving heat for 4 hours, cooling to 320 ℃ along with a furnace, discharging, and placing air for cooling;
s6, placing the obtained cutting pick forging stock in a composite latent solid lubricant 500 at 90 ℃ for heat preservation for 15 minutes, obtaining the cutting pick 100 when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick 100 for later use;
s7, processing the cutting pick sleeve 200, and processing the latent pit on the cutting pick sleeve 200;
s8, placing the obtained cutting pick sleeve 200 in the composite latent solid lubricant 500 at 90 ℃ for heat preservation for 15 minutes, and taking out the cutting pick 100 for later use when the temperature of the cutting pick 100 is reduced to room temperature.
The bottom end of the pick shank 120 is provided with a tensioning sleeve 130. The first clearance surface is provided with an inner hidden pit 110, and the inner hidden pit 110 is respectively arranged on the outer wall of the cutting tooth handle 120 and the outer wall of the tensioning sleeve 130. The hidden pit arranged on the second clearance surface is an outer hidden pit 210, and the outer hidden pit 210 is positioned on the outer wall of the cutting pick sleeve 200. The inner and outer latent pits 110 and 210 are uniformly spaced pits 600.
The conical body at the top of the cutting pick is processed into an anti-abrasion structural surface through a laser.
A machining method of a cutting pick assembly of a wear-resistant latent type composite solid lubrication coal mining machine comprises the following steps:
s1, selecting 42Cr2Mo is a raw material for machining the cutting pick 100;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to heat to 1150 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging blank through a forming die;
s5, processing the inner hidden pit 110 on the stop forging stock, annealing, heating the cutting tooth forging stock to 850 ℃, preserving heat for 4 hours, furnace-cooling to 320 ℃, discharging, and placing air for cooling;
s6, placing the obtained cutting pick forging stock in a composite latent solid lubricant 500 at 90 ℃ for heat preservation for 15 minutes, obtaining the cutting pick 100 when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick 100 for later use;
s7, processing the pick sleeve 200, and processing the outer hidden pit 210 on the pick sleeve 200;
s8, placing the obtained cutting pick sleeve 200 in a 90 ℃ composite latent solid lubricant 500, preserving heat for 15 minutes, and taking out the cutting pick 100 for later use when the temperature of the cutting pick 100 is reduced to room temperature;
s9, coating the compound latent solid lubricant 500 on the cutting pick 100 and the cutting pick sleeve 200 in excess during assembly, so that the lubricant 500 can freely overflow from the gap between the cutting pick 100 and the cutting pick sleeve 200 and the gap between the cutting pick sleeve 200 and the cutting block 300;
s10, the assembly pick 100, the pick sleeve 200 and the pick holder 300 are integrated.
The process latent pits of the embodiments 1, 2 and 3 adopt different forms, but the whole process latent pits form latent lubrication and self-sealing effects, so that on one hand, the cutting teeth 100 and the cutting tooth sleeve 200 can freely rotate in the process of cutting coal or tunneling a rock geological structure, and on the other hand, the obtained cutting teeth 100 have certain working strength.
The solid lubricant 500 used in the embodiment of the invention is a waterproof, dustproof and long-acting composite solid lubricant 500 special for GR cutting teeth, and can be replaced by a conventional solid lubricant.
The embodiment 1 is an optimal technical scheme, can synchronously improve the service life of the three components by 5-8 times, and can also prevent water and dust and reduce abrasion.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a wear-resisting compound solid lubrication coal-winning machine pick subassembly of latent formula which characterized in that includes:
the top of the cutting pick is a conical body, the bottom of the cutting pick is a cutting pick handle, and the cutting pick handle is a cylindrical body;
the cutting pick sleeve is sleeved with the cutting pick handle and is in running fit with the cutting pick handle, and a first clearance surface is arranged between the cutting pick sleeve and the cutting pick handle;
the cutting pick sleeve is arranged in the cutting pick seat, the cutting pick sleeve is in running fit with the cutting pick seat, a second clearance surface is arranged between the cutting pick seat and the cutting pick, the cutting pick sleeve and the cutting pick seat are coaxial in clearance;
at least one clearance surface of the first clearance surface and the second clearance surface is provided with a latent pit, and the latent pit is filled with the composite latent solid lubricant;
the cutting pick is manufactured by the following processing technology, and comprises the following steps:
s1, selecting 42Cr2Mo is a raw material for processing cutting teeth;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to be heated to 1100-1200 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging stock through a forming die;
s5, processing the latent pit on the stop forging stock, annealing, heating the cutting tooth forging stock to 800-900 ℃, preserving heat for 3-5 hours, cooling to 300-350 ℃ along with a furnace, discharging, and placing for air cooling;
s6, placing the obtained cutting pick forging stock in a composite latent solid lubricant at the temperature of 70-95 ℃ for heat preservation for 8-20 minutes, obtaining the cutting pick when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick for later use.
2. The wear-resistant latent composite solid lubricant shearer pick assembly of claim 1, wherein a bottom end of the pick shank is provided with a tensioning sleeve.
3. The wear-resistant latent composite solid lubricant shearer pick assembly of claim 2, wherein the first clearance surface is provided with a latent pit that is an inner latent pit located on an outer wall of the pick shank and an outer wall of the tensioning sleeve, respectively.
4. The wear-resistant latent composite solid lubricant shearer pick assembly of claim 3, wherein the second clearance surface provides a latent pit that is an outer latent pit located on the pick sleeve outer wall.
5. The wear-resistant hidden composite solid lubricant shearer pick assembly of claim 4, wherein the inner and outer hidden pits are spiral grooves, two of the spiral grooves are located on the outer wall of the pick and the outer wall of the pick sleeve, and a vertical communication groove is provided between adjacent grooves of the spiral grooves.
6. The wear-resistant latent composite solid lubricant shearer pick assembly of claim 4, wherein the inner and outer latent pits are groups of array holes.
7. The wear-resistant latent composite solid lubricant shearer pick assembly of claim 4, wherein the inner and outer latent pits are uniformly spaced pits.
8. The wear-resistant latent composite solid lubricant shearer pick assembly of claim 1, wherein the cone of the pick tip is laser machined to a wear resistant structural surface.
9. A method of machining a pick assembly of a wear-resistant latent composite solid lubricant shearer according to any one of claims 1 to 8, comprising the steps of:
s1, selecting 42Cr2Mo is a raw material for processing cutting teeth;
s2, blanking and cutting the raw material in the S1 through a shearing machine to obtain the bar
S3, performing shot blasting coating on the bar, and oxidizing and preventing decarburization of the graphite coating;
s4, placing the bar in a medium-frequency induction heating furnace to be heated to 1100-1200 ℃, preparing a primary blank through a die, and preparing a cutting tooth forging stock through a forming die;
s5, processing the inner latent pit on the stop forging stock, annealing, heating the cutting tooth forging stock to 800-900 ℃, preserving heat for 3-5 hours, cooling to 300-350 ℃ along with a furnace, discharging, and placing air for cooling;
s6, placing the obtained cutting pick forging stock in a composite latent solid lubricant at 70-95 ℃ for heat preservation for 8-20 minutes, obtaining the cutting pick when the temperature of the cutting pick forging stock is reduced to room temperature, and taking out the cutting pick for later use;
s7, processing the cutting pick sleeve, and processing the outer hidden pit on the cutting pick sleeve;
s8, placing the obtained cutting tooth sleeve in the composite latent solid lubricant at 70-95 ℃ for heat preservation for 8-20 minutes, and taking out the cutting tooth for later use when the temperature of the cutting tooth is reduced to room temperature;
s9, excessively coating the cutting teeth and the cutting tooth sleeve with the composite latent solid lubricant during assembly, so that the lubricant is preferably freely overflowed at a gap between the cutting teeth and the cutting tooth sleeve and a gap between the cutting tooth sleeve and the cutting seat;
s10, the assembly cutting pick, the cutting pick sleeve and the cutting pick seat are integrated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366363.6A CN111022045A (en) | 2019-12-26 | 2019-12-26 | Wear-resistant hidden type composite solid lubrication coal mining machine cutting tooth assembly and machining method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366363.6A CN111022045A (en) | 2019-12-26 | 2019-12-26 | Wear-resistant hidden type composite solid lubrication coal mining machine cutting tooth assembly and machining method |
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| CN111022045A true CN111022045A (en) | 2020-04-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0180572A1 (en) * | 1984-11-02 | 1986-05-07 | Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) | Device for the mining of rock, and round shank pick for this device |
| CN102729008A (en) * | 2012-06-26 | 2012-10-17 | 盐城理研精密锻造有限公司 | Method for forging cutting tooth boot and forward extrusion die |
| CN103174420A (en) * | 2011-12-20 | 2013-06-26 | 西安奥奈特固体润滑工程学研究有限公司 | Lurking type composite solid lubrication cutting tooth component of coal cutter and lurking type composite solid lubrication cutting tooth component method |
| CN107553078A (en) * | 2017-10-16 | 2018-01-09 | 重庆能特机械制造有限公司 | A kind of pick and its processing technology |
| CN108436395A (en) * | 2018-04-03 | 2018-08-24 | 盐城中德精锻股份有限公司 | A kind of pick set forging technology |
-
2019
- 2019-12-26 CN CN201911366363.6A patent/CN111022045A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0180572A1 (en) * | 1984-11-02 | 1986-05-07 | Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) | Device for the mining of rock, and round shank pick for this device |
| CN103174420A (en) * | 2011-12-20 | 2013-06-26 | 西安奥奈特固体润滑工程学研究有限公司 | Lurking type composite solid lubrication cutting tooth component of coal cutter and lurking type composite solid lubrication cutting tooth component method |
| CN102729008A (en) * | 2012-06-26 | 2012-10-17 | 盐城理研精密锻造有限公司 | Method for forging cutting tooth boot and forward extrusion die |
| CN107553078A (en) * | 2017-10-16 | 2018-01-09 | 重庆能特机械制造有限公司 | A kind of pick and its processing technology |
| CN108436395A (en) * | 2018-04-03 | 2018-08-24 | 盐城中德精锻股份有限公司 | A kind of pick set forging technology |
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