CN102689240B - Corn milling cutter and method for machining double-head corrugated corn milling cutter by using corn milling cutter - Google Patents
Corn milling cutter and method for machining double-head corrugated corn milling cutter by using corn milling cutter Download PDFInfo
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- CN102689240B CN102689240B CN201210171021.0A CN201210171021A CN102689240B CN 102689240 B CN102689240 B CN 102689240B CN 201210171021 A CN201210171021 A CN 201210171021A CN 102689240 B CN102689240 B CN 102689240B
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Abstract
The invention discloses a corn milling cutter fixture and a method for machining a double-head corrugated corn milling cutter by using the corn milling cutter fixture, and belongs to the technical field of machining cutters. The corn milling cutter fixture and the method solve problems that when a grinding machine with a common cutter machines a front surface of a corn milling cutter and a relief grinding machine tool grinds a wave blade and a relief angle of the corn milling cutter, equal division precision of cutting edges of cutters is poor due to manual control during grinding of front cutter surface of various teeth, and the service lives of the cutters are affected. A fixture body comprises a first cylinder, a boss, a second cylinder and a third cylinder which are sequentially manufactured integrally, a washer is sleeved on the third cylinder, a nut is connected with the third cylinder in a threaded manner, and a center hole is disposed in the center of an end surface of the third cylinder. The method includes selecting a bar material, discharging the bar material and turning an inner hole, an outer circumferential surfaces and two ends of the bar material; milling circumferential teeth to manufacture a milling cutter toothed blank; performing thermal treatment for the milling cutter toothed blank, and grinding and machining the milling cutter toothed blank to manufacture the corrugated corn milling cutter. The quenching hardness of the thermal treatment ranges from HRC (Rockwell hardness) 63 to HRC66. The corn milling cutter fixture and the method are used for machining the double-head corrugated corn milling cutter.
Description
Technical field
The present invention relates to a kind of maize milling cutter fixture and maize milling cutter processing method, belong to machining tool technical field.
Background technology
Maize milling cutter is the rough machined Common Use Tools of blade root, and this cutter is with helical angle, and the back of tooth is ripple tooth shape.Blade (the maximum cylindrical of maize milling cutter) runout error requires in 0.03mm, and point error requirements such as circumferential teeth is within 0.02mm.In the time of processing maize milling cutter, adopt universal cutter grinding machine process tool rake face, ripple tooth shape and the relief angle of common machine for making gear teeth grinding maize milling cutter, during due to each tooth rake face grinding, adopt manually and control, Tool in Cutting sword halving precision is poor, does not reach drawing requirement, affects cutter life.
Summary of the invention
The object of this invention is to provide a kind of maize milling cutter fixture and utilize this fixture processing double-ended wave edge shape maize milling cutter method, to solve in the time processing maize milling cutter, adopt universal cutter grinding machine process tool rake face, ripple tooth shape and the relief angle of common machine for making gear teeth grinding maize milling cutter, during due to each tooth rake face grinding, adopt manually and control, Tool in Cutting sword halving precision is poor, does not reach drawing requirement, affects the problem of cutter life.
The present invention addresses the above problem the technical scheme of taking to be: utilize maize milling cutter fixture described in maize milling cutter fixture processing double-ended wave edge shape maize milling cutter method to comprise clamp body, nut and packing ring, described clamp body is cylinder, clamp body is successively by all-in-one-piece the first cylinder processed, boss, the second cylinder and three cylindrical body composition, the first cylinder, boss, the second cylinder and three cylindrical body coaxially arrange, the cross section of boss is circular, the first cylindrical diameter is less than the diameter of three cylindrical body, the diameter of three cylindrical body is less than the second cylindrical diameter, the second cylindrical diameter is less than the diameter of boss, on the lateral wall of three cylindrical body, be processed with external screw thread, gasket sleeve is contained on three cylindrical body, nut is threaded with three cylindrical body, on the outer circumference surface of boss, be processed with two planes, two planes are symmetrical arranged with respect to the central axis of clamp body, the center of the end face of three cylindrical body is provided with center hole,
Said method comprising the steps of:
Step 1: select bar, blanking, car endoporus, outer circumference surface and two ends, endoporus car to nominal size-0.4～-0.5, cylindrical car to nominal size+0.6～+ 0.7, cutting parameter is: rotating speed is 160～180r/min, the amount of feeding is 0.2～0.25mm/r, and cutting depth is 1.5～2mm;
Step 2: milling circular tooth, make milling cutter tooth base; Cutting parameter is: rotating speed is 190～200r/min, and the amount of feeding is 0.1～0.15mm/r, and cutting depth is 6.5～7mm, and helical angle is 35 °, and point error such as circumferential teeth is less than 0.1mm;
Step 3: milling cutter tooth base is heat-treated; Heat treated quenching hardness is HRC63～66; Heat treated process is: first, by the preheating of milling cutter tooth base, preheat temperature is 540～550 DEG C, and be 2h preheating time; Then the milling cutter tooth base after preheating is put into moderate oven and heat, heating-up temperature is 840～850 DEG C, and the heat time is 16min; Again by through in milling cutter tooth base after temperature heating put into high temperature furnace and heat, heating-up temperature is 1220～1240 DEG C, heat time is 8min, again the milling cutter tooth base after high-temperature heating is put into constant-temperature oven and be incubated, holding temperature is 580～600 DEG C, and temperature retention time is 16min, again the milling cutter tooth base after insulation is put into tempering furnace tempering, temperature is 540～550 DEG C, and tempering time is 2h, takes out afterwards nature and is cooled to room temperature; Finally again the milling cutter tooth base after tempered is put into tempering furnace tempering again, temperature is 540～550 DEG C, and tempering time is 2h, takes out afterwards nature and is cooled to room temperature;
Step 4: the both ends of the surface grinding of milling cutter tooth base is after heat treatment reached to smooth state;
Step 5: double-ended wave edge shape maize milling cutter is made in the grinding of milling cutter tooth base; Milling cutter tooth base after the grinding of two ends is sleeved on the clamp body of maize milling cutter fixture, nut is tightened on clamp body, milling cutter tooth base is fixedly clamped by boss and nut, the first cylinder clamping of described clamp body is on numerically control grinder main axis arbor, tailstock centre withstands in the center hole on three cylindrical body end face, clamp body holds out against by tailstock centre, utilize described numerically control grinder grinding milling cutter tooth base anterior angle, ripple tooth shape sword and relief angle, 8～12 ° of anterior angles, 8 ° of relief angles, being finally processed into pitch is the double-ended wave edge shape maize milling cutter that 3mm, the depth of convolution are 1.2mm; Grinding parameter is: use the CBN emery wheel of B91, wherein: B91 refers to granularity; CBN refers to cubic boron nitride abrasive wheel, and described grinding wheel diameter is 100mm, and grinding speed is 24～26m/s, and the amount of feeding is 50～60mm/min, and grinding depth is 0.1～0.15mm.
The invention has the beneficial effects as follows: the present invention is owing to having developed special maize milling cutter fixture, adopt this maize milling cutter of Digit Control Machine Tool grinding, make Tool in Cutting sharpening cut decile uniformity, maize milling cutter blade (the maximum cylindrical of maize milling cutter) runout error after processing requires in 0.03mm, point error requirements such as circumferential teeth is within 0.02mm, surface roughness is increased to Ra0.8, cooling fully (because use Digit Control Machine Tool processing when tool grinding, so there is cooling fluid, original processing technology is with common machine for relief grinding processing, there is no cooling fluid), in addition surface coating processing, make to have improved 20～40% cutter life, test through actual cut, working (machining) efficiency doubles.
Brief description of the drawings
Fig. 1 is that the present invention utilizes the master of maize milling cutter fixture processing double-ended wave edge shape maize milling cutter to look installation diagram, and Fig. 2 is the main TV structure schematic diagram of clamp body, and Fig. 3 is the left hand view of Fig. 2.
Detailed description of the invention
Detailed description of the invention one: in conjunction with Fig. 1-Fig. 3 explanation, the maize milling cutter fixture of present embodiment, described maize milling cutter fixture comprises clamp body 1, nut 2 and packing ring 3, described clamp body 1 is cylinder, clamp body 1 is successively by all-in-one-piece the first cylinder 1-1 processed, boss 1-4, the second cylinder 1-2 and three cylindrical body 1-3 composition, the first cylinder 1-1, boss 1-4, the second cylinder 1-2 and three cylindrical body 1-3 coaxially arrange, the cross section of boss 1-4 is circular, the diameter of the first cylinder 1-1 is less than the diameter of three cylindrical body 1-3, the diameter of three cylindrical body 1-3 is less than the diameter of the second cylinder 1-2, the diameter of the second cylinder 1-2 is less than the diameter of boss 1-4, on the lateral wall of three cylindrical body 1-3, be processed with external screw thread 1-5, packing ring 3 is sleeved on three cylindrical body 1-3, nut 2 is threaded with three cylindrical body 1-3, on the outer circumference surface of boss 1-4, be processed with two plane 1-6, two plane 1-6 are symmetrical arranged with respect to the central axis of clamp body 1, being convenient to maize milling cutter fixture is installed on Digit Control Machine Tool, and conveniently maize milling cutter fixture is disassembled from Digit Control Machine Tool, the center of the end face of three cylindrical body 1-3 is provided with center hole 1-7, being convenient to maize milling cutter fixture leans on Digit Control Machine Tool.
Detailed description of the invention two: in conjunction with Fig. 1 and Fig. 2 explanation, present embodiment utilize maize milling cutter fixture processing double-ended wave edge shape maize milling cutter method described in detailed description of the invention one, said method comprising the steps of:
Step 1: select bar, blanking, car endoporus, outer circumference surface and two ends, endoporus car to nominal size-0.4～-0.5, cylindrical car to nominal size+0.6～+ 0.7, cutting parameter is: rotating speed is 160～180r/min, the amount of feeding is 0.2～0.25mm/r, and cutting depth is 1.5～2mm;
Step 2: milling circular tooth, make milling cutter tooth base; Cutting parameter is: rotating speed is 190～200r/min, and the amount of feeding is 0.1～0.15mm/r, and cutting depth is 6.5～7mm, and helical angle is 35 °, and point error such as circumferential teeth is less than 0.1mm;
Step 3: milling cutter tooth base is heat-treated; Heat treated quenching hardness is HRC63～66; Heat treated process is: first, by the preheating of milling cutter tooth base, preheat temperature is 540～550 DEG C, and be 2h preheating time; Then the milling cutter tooth base after preheating is put into moderate oven and heat, heating-up temperature is 840～850 DEG C, and the heat time is 16min; Again by through in milling cutter tooth base after temperature heating put into high temperature furnace and heat, heating-up temperature is 1220～1240 DEG C, heat time is 8min, again the milling cutter tooth base after high-temperature heating is put into constant-temperature oven and be incubated, holding temperature is 580～600 DEG C, and temperature retention time is 16min, again the milling cutter tooth base after insulation is put into tempering furnace tempering, temperature is 540～550 DEG C, and tempering time is 2h, takes out afterwards nature and is cooled to room temperature; Finally again the milling cutter tooth base after tempered is put into tempering furnace tempering again, temperature is 540～550 DEG C, and tempering time is 2h, takes out afterwards nature and is cooled to room temperature;
Step 4: the both ends of the surface grinding of milling cutter tooth base is after heat treatment reached to smooth state;
Step 5: double-ended wave edge shape maize milling cutter is made in the grinding of milling cutter tooth base, milling cutter tooth base after the grinding of two ends is sleeved on the clamp body 1 of maize milling cutter fixture, nut 2 is tightened on clamp body 1, milling cutter tooth base is fixedly clamped by boss 1-4 and nut 2, the first cylinder 1-1 clamping of described clamp body 1 is on numerically control grinder (five-shaft numerical control grinding machine) main axis arbor, tailstock centre withstands in the center hole 1-7 on three cylindrical body 1-3 end face, clamp body 1 by tailstock centre hold out against (this one folder one top mode not only ensured rotating accuracy, also the positioning precision while greatly having improved grinding), utilize described numerically control grinder grinding milling cutter tooth base anterior angle, ripple tooth shape sword and relief angle, 8～12 ° of anterior angles, 8 ° of relief angles, finally being processed into pitch is 3mm, the depth of convolution is the double-ended wave edge shape maize milling cutter 4 of 1.2mm, grinding parameter is: use the CBN emery wheel of B91, wherein: B91 refers to granularity, CBN refers to cubic boron nitride abrasive wheel, and described grinding wheel diameter is 100mm, and grinding speed is 24～26m/s, and the amount of feeding is 50～60mm/min, and grinding depth is 0.1～0.15mm.
Detailed description of the invention three: in conjunction with Fig. 1 explanation, method also comprises step 6 described in present embodiment: carry out the processing of TiN coating on the surface of described double-ended wave edge shape maize milling cutter 4.Object is for increasing case hardness, improve cutter life, having carried out coating processing.Additive method step is identical with detailed description of the invention one.
Claims (2)
1. one kind is utilized maize milling cutter fixture processing double-ended wave edge shape maize milling cutter method, described maize milling cutter fixture comprises clamp body (1), nut (2) and packing ring (3), described clamp body (1) is cylinder, clamp body (1) is successively by all-in-one-piece the first cylinder processed (1-1), boss (1-4), the second cylinder (1-2) and three cylindrical body (1-3) composition, the first cylinder (1-1), boss (1-4), the second cylinder (1-2) and three cylindrical body (1-3) coaxially arrange, the cross section of boss (1-4) is circular, the diameter of the first cylinder (1-1) is less than the diameter of three cylindrical body (1-3), the diameter of three cylindrical body (1-3) is less than the diameter of the second cylinder (1-2), the diameter of the second cylinder (1-2) is less than the diameter of boss (1-4), on the lateral wall of three cylindrical body (1-3), be processed with external screw thread (1-5), packing ring (3) is sleeved on three cylindrical body (1-3), nut (2) is threaded with three cylindrical body (1-3), on the outer circumference surface of boss (1-4), be processed with two planes (1-6), two planes (1-6) are symmetrical arranged with respect to the central axis of clamp body (1), the center of the end face of three cylindrical body (1-3) is provided with center hole (1-7), it is characterized in that: said method comprising the steps of:
Step 1: select bar, blanking, car endoporus, outer circumference surface and two ends, endoporus car to nominal size-0.4～-0.5, cylindrical car to nominal size+0.6～+ 0.7, cutting parameter is: rotating speed is 160～180r/min, the amount of feeding is 0.2～0.25mm/r, and cutting depth is 1.5～2mm;
Step 2: milling circular tooth, make milling cutter tooth base; Cutting parameter is: rotating speed is 190～200r/min, and the amount of feeding is 0.1～0.15mm/r, and cutting depth is 6.5～7mm, and helical angle is 35 °, and point error such as circumferential teeth is less than 0.1mm;
Step 3: milling cutter tooth base is heat-treated; Heat treated quenching hardness is HRC63～66; Heat treated process is: first, by the preheating of milling cutter tooth base, preheat temperature is 540～550 DEG C, and be 2h preheating time; Then the milling cutter tooth base after preheating is put into moderate oven and heat, heating-up temperature is 840～850 DEG C, and the heat time is 16min; Again by through in milling cutter tooth base after temperature heating put into high temperature furnace and heat, heating-up temperature is 1220～1240 DEG C, heat time is 8min, again the milling cutter tooth base after high-temperature heating is put into constant-temperature oven and be incubated, holding temperature is 580～600 DEG C, and temperature retention time is 16min, again the milling cutter tooth base after insulation is put into tempering furnace tempering, temperature is 540～550 DEG C, and tempering time is 2h, takes out afterwards nature and is cooled to room temperature; Finally again the milling cutter tooth base after tempered is put into tempering furnace tempering again, temperature is 540～550 DEG C, and tempering time is 2h, takes out afterwards nature and is cooled to room temperature;
Step 4: the both ends of the surface grinding of milling cutter tooth base is after heat treatment reached to smooth state;
Step 5: double-ended wave edge shape maize milling cutter is made in the grinding of milling cutter tooth base, milling cutter tooth base after the grinding of two ends is sleeved on the clamp body (1) of maize milling cutter fixture, nut (2) is tightened on clamp body (1), milling cutter tooth base is fixedly clamped by boss (1-4) and nut (2), the first cylinder (1-1) clamping of described clamp body (1) is on numerically control grinder main axis arbor, tailstock centre withstands in the center hole (1-7) on three cylindrical body (1-3) end face, clamp body (1) holds out against by tailstock centre, utilize described numerically control grinder grinding milling cutter tooth base anterior angle, ripple tooth shape sword and relief angle, 8～12 ° of anterior angles, 8 ° of relief angles, finally being processed into pitch is 3mm, the depth of convolution is the double-ended wave edge shape maize milling cutter (4) of 1.2mm, grinding parameter is: use the CBN emery wheel of B91, wherein: B91 refers to granularity, CBN refers to cubic boron nitride abrasive wheel, and described grinding wheel diameter is 100mm, and grinding speed is 24～26m/s, and the amount of feeding is 50～60mm/min, and grinding depth is 0.1～0.15mm.
2. utilize according to claim 1 maize milling cutter fixture processing double-ended wave edge shape maize milling cutter method, it is characterized in that: described method also comprises step 6: carry out the processing of TiN coating on the surface of described double-ended wave edge shape maize milling cutter (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210171021.0A CN102689240B (en) | 2012-05-29 | 2012-05-29 | Corn milling cutter and method for machining double-head corrugated corn milling cutter by using corn milling cutter |
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| CN201210171021.0A CN102689240B (en) | 2012-05-29 | 2012-05-29 | Corn milling cutter and method for machining double-head corrugated corn milling cutter by using corn milling cutter |
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| CN102689240B true CN102689240B (en) | 2014-09-17 |
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| CN103111820B (en) * | 2013-03-20 | 2014-12-24 | 沈阳飞机工业（集团）有限公司 | Machining technology of tooth profile of milling cutter with wave-shaped cutter edge |
| CN103495849B (en) * | 2013-10-10 | 2016-05-18 | 北京航空航天大学 | A kind of face gear milling cutter manufacture method |
| CN110026897A (en) * | 2019-05-13 | 2019-07-19 | 成都凯天电子股份有限公司 | It is mounted directly the internal grinding knife bar of grinding wheel |
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