CN114713891B - Hob capable of resisting accumulated scraps and abrasion and production process thereof - Google Patents
Hob capable of resisting accumulated scraps and abrasion and production process thereof Download PDFInfo
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- CN114713891B CN114713891B CN202210247034.5A CN202210247034A CN114713891B CN 114713891 B CN114713891 B CN 114713891B CN 202210247034 A CN202210247034 A CN 202210247034A CN 114713891 B CN114713891 B CN 114713891B
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- cutter
- tooth
- side face
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000005299 abrasion Methods 0.000 title abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims description 96
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 20
- 238000000576 coating method Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- 229910052790 beryllium Inorganic materials 0.000 claims description 7
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910000906 Bronze Inorganic materials 0.000 claims description 6
- 239000010974 bronze Substances 0.000 claims description 6
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 abstract description 8
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 239000000110 cooling liquid Substances 0.000 description 24
- 206010028980 Neoplasm Diseases 0.000 description 8
- 238000000227 grinding Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/165—Milling-cutters characterised by physical features other than shape with chipbreaking or chipdividing equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/28—Features relating to lubricating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/12—Side or flank surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/20—Top or side views of the cutting edge
- B23C2200/201—Details of the nose radius and immediately surrounding areas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/32—Chip breaking or chip evacuation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Processing (AREA)
Abstract
The invention discloses a hob capable of resisting accumulated chip abrasion and a production process thereof, relates to the technical field of hob, and solves the problems that in the prior art, interrupted cutting salient points are connected to two sides of a hob tooth, the thickness of the lower end of the hob tooth is increased, heat dissipation of the hob tooth is not facilitated, the front angle of the hob is large, and the hob is easy to collapse. The hob cutter comprises a hob cutter body and hob cutter teeth, wherein the hob cutter teeth are arranged on the periphery of the hob cutter body at equal distance, mounting shafts are arranged at two ends of the hob cutter body, cutter tooth grooves are formed between the hob cutter teeth, and the hob cutter teeth comprise a first side face, a second side face and a third side face. According to the hob and the production process of the hob with the anti-chip accumulation abrasion function, provided by the invention, the front angle of the hob tooth is larger, and the second side face is utilized to keep a certain distance between the cutter and the workpiece, so that the contact surface of the hob tooth and the workpiece can be reduced, the deformation of chips, the friction between the chips and the front cutter face, the cutting force and the cutting heat can be reduced, and the generation of chip accumulation can be inhibited or the height of the chip accumulation can be reduced.
Description
Technical Field
The invention relates to the technical field of hob cutters, in particular to a hob cutter capable of resisting accumulated chip abrasion and a production process thereof.
Background
During the cutting process, a great pressure and a high cutting temperature are generated between the chip and the rake face due to the extrusion deformation and the strong friction of the metal. When the pressure and temperature conditions are proper, the friction resistance between the chip bottom layer and the rake face is large, so that the chip bottom layer outflow speed becomes slow, and a thin 'stagnation layer' is formed. When the frictional resistance between the "stagnant layer" and the rake surface exceeds the bonding force in the chip, the metal of the stagnant layer separates from the chip and adheres to the vicinity of the cutting edge to form a built-up chip. The built-up is essentially the result of cold welding occurring during the cutting process. Along with the cutting process, the accumulated chip tumor grows up continuously, and when the accumulated chip tumor reaches a certain height, the accumulated chip tumor is broken and falls off due to cutting impact and vibration surface, and is taken away by the chip or embedded on the surface of the workpiece.
Chinese patent CN112620825B discloses a turbine hob for preventing damage of sticky chips, belonging to the field of cutters. The turbine hob capable of preventing damage of adhered scraps comprises a hob body and hob teeth, wherein the hob teeth are spirally fixed on the periphery of the hob body, tooth grooves are formed between two adjacent hob teeth, a scraps breaking part is arranged in each tooth groove, the scraps breaking part can prevent scraps of workpieces from accumulating at the bottom of each tooth groove, each scraps breaking part comprises a left scraps breaking convex point and a right scraps breaking convex point, the left scraps breaking convex point is fixedly arranged at the joint of the left hob tooth and the tooth groove, the right scraps breaking convex point is fixedly arranged at the joint of the right hob tooth and the tooth groove, the left chip breaking convex point and the right chip breaking convex point can change the advancing direction of the chip breaking of the workpiece, so that the chip breaking of the workpiece advances towards the direction far away from the bottom of the tooth slot, and the phenomenon that the chip of the workpiece is accumulated at the bottom of the tooth slot to form sticky chips can be effectively avoided under the condition that the strength of a cutter is not affected when the workpiece is machined by a hob, the chip of the workpiece adhered to the side wall of a cutter tooth can be conveniently fallen off, and the risk of forming chip accumulation tumors on the tooth tip of the cutter tooth can be reduced.
Although this application solves the problems in the background art to some extent, the following problems exist in this application: 1. the cutting convex points are connected to the two sides of the cutter teeth, so that the thickness of the lower ends of the cutter teeth is increased, the heat dissipation of the cutter teeth is not facilitated, and the risk of chip adhesion is easily increased when the temperature of the cutter teeth is too high; 2. the front angle of the hob is larger, and the hob is easy to break.
Disclosure of Invention
The invention aims to provide a hob for preventing accumulated chip abrasion and a production process thereof, wherein the hob mainly comprises a hob body, hob teeth and an installation shaft, the hob teeth comprise a first side face, a second side face and a third side face, the front angle of the hob teeth is larger, and the second side face is used for keeping a certain distance between a cutter and a workpiece, so that the contact surface between the hob teeth and the workpiece can be reduced, the deformation of chips, the friction between the chips and the front cutter face, the cutting force and the cutting heat can be reduced, and the generation of accumulated chip tumor can be inhibited or the height of accumulated chip tumor can be reduced; the hob cutter teeth are provided with cooling pipes, cooling liquid is stored by the cooling pipes, when chip scraps are contacted with the cooling pipes, the cooling liquid in the cooling pipes cools the chip scraps once through the cooling pipes, the radian of the cooling pipes and the chip scraps implement guiding action, the chip scraps are curved, the cooling liquid in the cooling pipes finally overflows through overflow holes, the cooling liquid is thrown onto the chip scraps, the chip scraps are cooled again, the temperature of the chip scraps is reduced, and the generation of accumulated chip scraps can be inhibited; and when the cooled chip scraps move along the third side surface, the heat on the third side surface can be absorbed, the heat on the hob cutter teeth is further taken away, the cooling liquid which is not contacted with the chip scraps can also move along the outer wall of the cooling pipe and is thrown onto the first side surface, the temperature of the main chip edge is reduced, the temperature of the hob cutter teeth is reduced, and the generation of accumulated chip tumors can be restrained, so that the problems in the prior art are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an anti long-pending bits wearing and tearing hobbing cutter, includes hob cutter body and hob cutter tooth, the equidistant hob cutter tooth that is provided with in a week of hob cutter body, and the both ends of hob cutter body are provided with the installation axle, be provided with the sword tooth's socket between the hob cutter tooth, hob cutter tooth includes first side, second side and third side, and first side, second side and third side connect gradually, and the junction of first side and second side constitutes main cutting edge, has seted up the cooling tank on the lateral wall of first side, and the outer welding of cooling tank has the cooling tube.
Preferably, both ends of the hob body are provided with water inlet grooves, the center position of the water inlet grooves is fixedly connected with one end of the installation shaft, water inlet holes are formed in the side wall of the water inlet grooves at equal intervals, the water inlet holes are connected with arc-shaped channels, the arc-shaped channels penetrate through the hob body, and one ends of the arc-shaped channels are communicated with the cooling grooves.
Preferably, the inclination angle of the first side surface is larger than the inclination angle of the third side surface, and the inclination angle of the second side surface is smaller than the third side surface.
Preferably, the inner wall of the cooling groove and the inner wall of the cooling pipe are connected to form a whole circle, and the inner wall of the cooling groove occupies an arc length of the whole circle to be less than half of the circumference of the whole circle.
Preferably, the cooling pipe is made of beryllium bronze material, two ends of the cooling pipe are of sealing structures, the cooling pipe is provided with overflow holes distributed equidistantly, and the center line of the overflow holes and the second side face are on the same plane.
Preferably, the surface of the cooling pipe is provided with a wear-resistant coating, and the wear-resistant coating is a tungsten carbide alloy coating.
Preferably, the tooth slot is of an irregular cambered surface structure, and the radian of the tooth slot close to the first side face is larger than that of the tooth slot close to the third side face.
The invention provides a production process of a hob with chip accumulation abrasion resistance, which comprises the following steps:
s1: preparing hard alloy blank components according to the performance requirement of a cutter, firstly performing compression molding, then preparing a primary blank, and then sintering to obtain a material;
s2: processing a water inlet groove, a water inlet hole and an arc-shaped channel on the sintered material, and performing fine polishing to finish the processing of the hob body;
s3: the hob is arranged on a taper mandrel or a hydraulic mandrel, hob teeth are trimmed by diamond rollers, the first side face, the second side face and the third side face of the hob teeth are polished, after finishing, the data such as the size, the angle and the like of each hob tooth are detected in a full range, the size and the angle of each hob tooth are ensured to be the same, and the processing of the hob teeth is finished;
S4: rough grinding is carried out between hob cutter teeth, after a cutter tooth slot is formed preliminarily, finish grinding is carried out, the hob is placed in an oil furnace according to the requirement in the production process, and the temperature is kept for a certain time to remove the surface stress generated in the grinding process so as to reduce the grinding deformation and improve the machining precision;
S5: a cooling groove is formed in the side wall of the first side surface, and the side wall is placed into a liquid nitrogen cooling low-temperature box for low-temperature aging treatment after processing is finished so as to ensure the stability of the size of the internal tissue of the shaping material;
s6: forming overflow holes on the cooling pipe, spraying a wear-resistant coating on the surface of the cooling pipe, and cooling and shaping the wear-resistant coating for later use;
S7: the two ends of the hob body are respectively welded with the installation shaft, the two sides of the cooling groove are welded with the cooling pipes, and the welding positions are polished.
Preferably, the spraying wear-resistant coating in the step S6 is thermal spraying, and the thickness of the sprayed wear-resistant coating is 0.02-0.05mm.
Compared with the prior art, the invention has the beneficial effects that:
1. The hob mainly comprises a hob body, hob teeth and an installation shaft, wherein the hob teeth comprise a first side face, a second side face and a third side face, the front angle of the hob teeth is larger, the second side face is used for keeping a certain distance between a cutter and a workpiece, the contact surface of the hob teeth and the workpiece can be reduced, the deformation of chips, the friction between the chips and the front cutter face, the cutting force and the cutting heat can be reduced, and the generation of accumulated chips or the height of accumulated chips can be inhibited;
2. According to the hob for preventing accumulated chip abrasion and the production process thereof, the cooling pipes are arranged on hob teeth, cooling liquid is stored by the cooling pipes, when the chip chips are contacted with the cooling pipes, the cooling liquid in the cooling pipes cools the chip chips once through the cooling pipes, the radian of the cooling pipes and the chip chips perform guiding action, the chip chips are bent, the cooling liquid in the cooling pipes finally overflows through the overflow holes, the cooling liquid is thrown onto the chip chips, the chip chips are cooled again, the temperature of the chip chips is reduced, and generation of accumulated chip nodules can be inhibited;
3. According to the hob for resisting accumulated chip abrasion and the production process thereof, when the cooled chip chips move along the third side face, the heat on the third side face can be absorbed, the heat on the hob teeth is further taken away, cooling liquid which is not contacted with the chip chips can also move along the outer wall of the cooling pipe and is thrown onto the first side face, the main chip edge is cooled, the temperature of the hob teeth is reduced, and generation of accumulated chip tumors can be restrained.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is an enlarged view of the invention;
FIG. 3 is a schematic cross-sectional view of the hob body of the present invention;
FIG. 4 is a cross-sectional view of a hob tooth according to the present invention;
FIG. 5 is a schematic view of the hob tooth of the present invention during an initial stage of workpiece processing;
Fig. 6 is a schematic view of the hob tooth of the present invention during the machining of a workpiece.
In the figure: 1. a hob body; 11. a water inlet tank; 111. a water inlet hole; 12. an arcuate channel; 2. hob teeth; 21. a first side; 211. a cooling tank; 22. a second side; 23. a third side; 3. a mounting shaft; 4. a cutter tooth slot; 5. a cooling tube; 51. and overflow holes.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, a hob with chip accumulation abrasion resistance comprises a hob body 1 and hob teeth 2, wherein the hob teeth 2 are arranged on the hob body 1 at equal intervals on the periphery, mounting shafts 3 are arranged at two ends of the hob body 1, water inlet grooves 11 are arranged at two ends of the hob body 1, the center position of the water inlet grooves 11 is fixedly connected with one end of the mounting shafts 3, water inlet holes 111 are arranged on the side walls of the water inlet grooves 11 at equal intervals, arc-shaped channels 12 are connected with the water inlet holes 111, the arc-shaped channels 12 penetrate through the hob body 1, one ends of the arc-shaped channels 12 are communicated with a cooling groove 211, cooling liquid can be stored in the water inlet grooves 11 through additionally arranging sealing covers in the water inlet grooves 11, and when the hob body 1 rotates, the cooling liquid can be thrown into the water inlet holes 111 under the centrifugal action and is sent into the cooling groove 211 to cool the hob teeth 2.
Referring to fig. 3-4, a cutter tooth groove 4 is formed between the hob cutter teeth 2, the cutter tooth groove 4 is of an irregular arc surface structure, and the radian of the cutter tooth groove 4 close to the first side surface 21 is larger than that of the cutter tooth groove 4 close to the third side surface 23, so that the radian of the lower end of the hob cutter tooth 2 close to the first side surface 21 is gentler, the stability of the hob cutter tooth 2 can be improved, and in addition, the gradient of the third side surface 23 of the hob cutter tooth 2 is slower, and the hob cutter tooth 2 is supported.
The hob tooth 2 comprises a first side surface 21, a second side surface 22 and a third side surface 23, the first side surface 21, the second side surface 22 and the third side surface 23 are sequentially connected, the joint of the first side surface 21 and the second side surface 22 forms a main cutting edge, a cooling groove 211 is formed in the side wall of the first side surface 21, a cooling pipe 5 is welded outside the cooling groove 211, the inclination angle of the first side surface 21 is larger than that of the third side surface 23, when workpiece scraps produced by cutting contact with the third side surface 23, the inclination angle of the third side surface 23 is relatively slow, the workpiece scraps can be automatically turned under the action of the third side surface 23, the setting of chip breaking convex points is reduced, the bending deformation of the cutting scraps can be completed, the inclination angle of the second side surface 22 is smaller than that of the third side surface 23, when cutting chips move out of the third side surface 23, the cutting chips are not in contact with the second side surface 22, the cutter breakage is avoided, the inner wall of the cooling groove 211 and the inner wall of the cooling pipe 5 are connected to form a whole circle, the inner wall of the cooling groove 211 occupies the arc length of the whole circle to be smaller than half of the circumference of the whole circle, the cooling groove 211 arranged on the first side surface 21 is of an arc-shaped structure, when cutting chips, the cooling pipe 5 can bear certain deformation, the two sides of the cooling groove 211 are connected through the new arc-shaped structure, the problem that the cooling groove 211 is broken when the hob tooth 2 works is prevented, the whole arc length of the cooling groove 211 is smaller than half of the circumference of the whole circle, and the reduction of the whole strength of the hob tooth 2 caused by the cooling groove 211 is reduced.
Referring to fig. 5-6, the cooling tube 5 is made of beryllium bronze material, both ends of the cooling tube 5 are of a sealing structure, the beryllium bronze is tin-free bronze taking beryllium as a main alloy component, contains 1.7-2.5% of beryllium and a small amount of nickel, chromium, titanium and other elements, after quenching and aging treatment, the strength limit can reach 1250-1500 MPa, the level of the medium strength steel is close to that of the medium strength steel, the beryllium bronze has very high hardness, elastic limit, fatigue limit and wear resistance, and also has good corrosion resistance, thermal conductivity and electrical conductivity, no spark is generated when impacted, the cooling tube 5 is provided with overflow holes 51 distributed equidistantly, the center line of the overflow holes 51 and the second side 22 are on the same plane, when chips contact the cooling tube 5, the cooling liquid in the cooling tube 5 carries out one-time cooling on the chip chips through the cooling tube 5, and the cooling tube 5 is guided, the chip scraps are in a curved shape, the cooling liquid in the cooling pipe 5 finally overflows through the overflow hole 51, the overflowed cooling liquid moves along the outer wall of the cooling pipe 5 under the action of centrifugal force until contacting the chip scraps, the cooling liquid is thrown onto the chip scraps to cool the chip scraps again, after cooling for two times, the curved chip scraps keep a certain radian to contact the third side surface 23, the chip scraps can absorb heat on the third side surface 23 when moving along the third side surface 23, the heat on the hob tooth 2 is further taken away, if the cooling liquid is not touched onto the chip scraps when overflowing, the cooling liquid moving along the outer wall of the cooling pipe 5 can also be thrown onto the first side surface 21 to cool the main chip scraps, the surface of the cooling pipe 5 is provided with a wear-resistant coating which is a tungsten carbide alloy coating, the used matrix material of the tungsten carbide alloy coating is not limited, can be metal or nonmetal, can be sprayed on various base materials, has small temperature rise, and does not generate stress and deformation.
In order to better demonstrate the production flow of the hob with the anti-chip accumulation and abrasion function, the embodiment now provides a production process of the hob with the anti-chip accumulation and abrasion function, which comprises the following steps:
Step one: preparing hard alloy blank components according to the performance requirement of a cutter, firstly performing compression molding, then preparing a primary blank, and then sintering to obtain a material;
step two: processing a water inlet groove 11, a water inlet hole 111 and an arc-shaped channel 12 on the sintered material, and performing fine polishing to finish the processing of the hob body 1;
Step three: the hob is arranged on a taper mandrel or a hydraulic mandrel, hob teeth 2 are trimmed by diamond rollers, the first side surface 21, the second side surface 22 and the third side surface 23 of the hob teeth 2 are polished, after finishing, the data such as the size, the angle and the like of each hob tooth 2 are detected in a full range, the size and the angle of each hob tooth 2 are ensured to be the same, and the processing of the hob teeth 2 is finished;
Step four: rough grinding is carried out between hob cutter teeth 2, after a cutter tooth slot 4 is formed preliminarily, finish grinding is carried out, the hob is placed in an oil furnace according to the need in the production process, and the heat is preserved for a certain time to remove the surface stress generated in the grinding process, so that the grinding deformation is reduced, and the machining precision is improved;
Step five: a cooling groove 211 is formed in the side wall of the first side surface 21, and the side wall is placed into a liquid nitrogen cooling low-temperature box for low-temperature aging treatment after processing is finished so as to ensure the stability of the size of the internal structure of the shaping material;
Step six: forming overflow holes 51 on the cooling pipe 5, spraying a wear-resistant coating on the surface of the cooling pipe 5, and after the wear-resistant coating is cooled and shaped for later use, adopting thermal spraying for the sprayed wear-resistant coating, wherein the thickness of the sprayed wear-resistant coating is 0.02-0.05mm;
step seven: the two ends of the hob body 1 are respectively welded with the installation shaft 3, the two sides of the cooling groove 211 are welded with the cooling pipes 5, and the welding positions are polished.
To sum up: the hob mainly comprises a hob body 1, hob teeth 2 and an installation shaft 3, wherein the hob teeth 2 comprise a first side surface 21, a second side surface 22 and a third side surface 23, the front angle of the hob teeth 2 is larger, and the second side surface 22 is used for keeping a certain distance between a cutter and a workpiece, so that the contact surface of the hob teeth 2 and the workpiece can be reduced, the deformation of chips, the friction between the chips and the front cutter surface, the cutting force and the cutting heat can be reduced, and the generation of the built-up chip or the height of the built-up chip can be inhibited; the hob tooth 2 is provided with the cooling pipe 5, the cooling pipe 5 is used for storing cooling liquid, when the chip scraps are contacted with the cooling pipe 5, the cooling liquid in the cooling pipe 5 is used for cooling the chip scraps once through the cooling pipe 5, the radian of the cooling pipe 5 and the chip scraps are guided, the chip scraps are curved, the cooling liquid in the cooling pipe 5 finally overflows through the overflow holes 51, the cooling liquid is thrown onto the chip scraps, the chip scraps are cooled again, the temperature of the chip scraps is reduced, and the generation of accumulated chip scraps can be inhibited; when the cooled chip scraps move along the third side surface 23, heat on the third side surface 23 can be absorbed, heat on the hob cutter teeth 2 can be further taken away, cooling liquid which is not contacted with the chip scraps can also move along the outer wall of the cooling pipe 5 and throw the cooling liquid onto the first side surface 21, so that the temperature of the main chip edge is reduced, the temperature of the hob cutter teeth 2 is reduced, and generation of accumulated chips can be suppressed.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (5)
1. The utility model provides an anti long-pending bits hobbing cutter that wears, includes hob cutter body (1) and hob cutter tooth (2), its characterized in that: the novel hob comprises hob bodies (1), wherein hob teeth (2) are arranged at equal intervals on the periphery of each hob body (1), mounting shafts (3) are arranged at two ends of each hob body (1), hob tooth grooves (4) are formed between the hob teeth (2), each hob tooth (2) comprises a first side face (21), a second side face (22) and a third side face (23), the first side faces (21), the second side faces (22) and the third side faces (23) are sequentially connected, a main cutting edge is formed at the joint of each first side face (21) and each second side face (22), a cooling groove (211) is formed in the side wall of each first side face (21), and a cooling pipe (5) is welded outside each cooling groove (211);
the inclination angle of the first side surface (21) is larger than that of the third side surface (23), and the inclination angle of the second side surface (22) is smaller than that of the third side surface (23);
The inner wall of the cooling groove (211) is connected with the inner wall of the cooling pipe (5) to form a whole circle, and the inner wall of the cooling groove (211) occupies an arc length of the whole circle to be less than half of the circumference of the whole circle;
The cooling pipe (5) is made of beryllium bronze, two ends of the cooling pipe (5) are of sealing structures, overflow holes (51) distributed equidistantly are formed in the cooling pipe (5), and the center line of the overflow holes (51) and the second side face (22) are on the same plane;
The hob body (1) is provided with intake groove (11) in both ends, and the central point of intake groove (11) puts and the one end fixed connection of installation axle (3), is provided with inlet opening (111) on the lateral wall of intake groove (11) equidistance, and inlet opening (111) are connected with arc passageway (12), and arc passageway (12) run through hob body (1), and the one end and the cooling bath (211) of arc passageway (12) communicate.
2. A chip wear resistant hob according to claim 1, characterized in that: the surface of the cooling pipe (5) is provided with a wear-resistant coating which is a tungsten carbide alloy coating.
3. A chip wear resistant hob according to claim 2, characterized in that: the cutter tooth groove (4) is of an irregular cambered surface structure, and the radian of the cutter tooth groove (4) close to the first side face (21) is larger than that of the cutter tooth groove (4) close to the third side face (23).
4. A process for producing the anti-chip wear hob according to claim 3, characterized in that it comprises the following steps:
s1: preparing hard alloy blank components according to the performance requirement of a cutter, firstly performing compression molding, then preparing a primary blank, and then sintering to obtain a material;
S2: processing a water inlet groove (11), a water inlet hole (111) and an arc-shaped channel (12) on the sintered material, and performing fine polishing to finish the processing of the hob body (1);
S3: the hob is arranged on a taper mandrel or a hydraulic mandrel, hob teeth (2) are trimmed by diamond rollers, the first side face (21), the second side face (22) and the third side face (23) of the hob teeth (2) are polished, after finishing, the size and angle data of each hob tooth (2) are detected in a full range, the size and angle of each hob tooth (2) are guaranteed to be the same, and the hob teeth (2) are machined;
s4: rough polishing is carried out between hob teeth (2), and after a hob tooth groove (4) is formed preliminarily, fine polishing is carried out;
s5: a cooling groove (211) is formed in the side wall of the first side surface (21), and the processed side wall is placed into a liquid nitrogen cooling low-temperature box for low-temperature aging treatment;
S6: forming overflow holes (51) on the cooling pipe (5), spraying a wear-resistant coating on the surface of the cooling pipe (5), and standing the wear-resistant coating after cooling and shaping;
S7: the two ends of the hob body (1) are respectively welded with the installation shaft (3), the two sides of the cooling groove (211) are welded with the cooling pipes (5), and the welding positions are polished.
5. The production process of the hob with chip wear resistance according to claim 4, wherein: and the sprayed wear-resistant coating in the step S6 is thermally sprayed, and the thickness of the sprayed wear-resistant coating is 0.02-0.05mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247034.5A CN114713891B (en) | 2022-03-14 | 2022-03-14 | Hob capable of resisting accumulated scraps and abrasion and production process thereof |
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| CN202210247034.5A CN114713891B (en) | 2022-03-14 | 2022-03-14 | Hob capable of resisting accumulated scraps and abrasion and production process thereof |
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| CN114713891B true CN114713891B (en) | 2024-04-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107297549A (en) * | 2017-08-16 | 2017-10-27 | 江阴塞特精密工具有限公司 | The micro- hard alloy micron hob of superfinishing and its manufacturing process |
| CN206643409U (en) * | 2017-03-14 | 2017-11-17 | 达晟益科技发展（深圳）有限公司 | A kind of fin processes aluminium milling cutter |
| CN211464958U (en) * | 2019-12-26 | 2020-09-11 | 天津宝利通达刀具有限公司 | Milling cutter capable of accelerating chip removal speed |
| CN211991280U (en) * | 2020-04-21 | 2020-11-24 | 浙江上优刀具有限公司 | Good heat dissipation's gear hobbing cutter before grinding |
| CN112620825A (en) * | 2020-12-01 | 2021-04-09 | 浙江上优刀具有限公司 | Turbine hob capable of preventing sticky scraps from being damaged |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201207447D0 (en) * | 2012-04-26 | 2012-06-13 | Exactaform Cutting Tools Ltd | Rotary cutting tool |
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- 2022-03-14 CN CN202210247034.5A patent/CN114713891B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206643409U (en) * | 2017-03-14 | 2017-11-17 | 达晟益科技发展（深圳）有限公司 | A kind of fin processes aluminium milling cutter |
| CN107297549A (en) * | 2017-08-16 | 2017-10-27 | 江阴塞特精密工具有限公司 | The micro- hard alloy micron hob of superfinishing and its manufacturing process |
| CN211464958U (en) * | 2019-12-26 | 2020-09-11 | 天津宝利通达刀具有限公司 | Milling cutter capable of accelerating chip removal speed |
| CN211991280U (en) * | 2020-04-21 | 2020-11-24 | 浙江上优刀具有限公司 | Good heat dissipation's gear hobbing cutter before grinding |
| CN112620825A (en) * | 2020-12-01 | 2021-04-09 | 浙江上优刀具有限公司 | Turbine hob capable of preventing sticky scraps from being damaged |
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| CN114713891A (en) | 2022-07-08 |
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