CN108941636B - Turning tool and die lip turning method using same - Google Patents
Turning tool and die lip turning method using same Download PDFInfo
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- CN108941636B CN108941636B CN201811038162.9A CN201811038162A CN108941636B CN 108941636 B CN108941636 B CN 108941636B CN 201811038162 A CN201811038162 A CN 201811038162A CN 108941636 B CN108941636 B CN 108941636B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories 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
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
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Abstract
The invention discloses a turning tool, which is used for processing a support ring of a die lip and comprises a tool bar and tool grains, wherein the front end of the tool bar is provided with an installation groove, the tool grains comprise a turning part and an installation part, one end of the turning part is connected with the installation part, the installation part is fixed in the installation groove, and the turning part extends out of the installation groove; the turning part comprises an upper cutter face, a front cutter face and a rear cutter face, a first cutting edge is formed between the upper cutter face and the front cutter face, a second cutting edge is formed between the upper cutter face and the rear cutter face, and an included angle between the front cutter face and the rear cutter face is 10-15 degrees; the invention has the advantages of high processing efficiency and low processing cost, can effectively improve the production profit and has considerable social and economic benefits.
Description
Technical Field
The invention relates to the field of machining, in particular to a turning tool and a die lip turning method using the same.
Background
The die lip is a die for producing plastic bottle blanks, and in order to ensure that the die lip has higher yield when used for producing the plastic bottle blanks, the machining precision requirement is higher, the groove width/groove depth of the support ring on the inner side of the die lip is less than or equal to 1/5, and the common machining method is difficult to machine the support ring, so that in the existing production method, the support ring is usually machined in an electric spark machining mode, the electric spark machining efficiency is lower, the support ring can be formed and machined once in 2-3.5 hours, mass production is difficult, the electrode price of electric spark machining is higher, and the machining cost of the die lip is higher.
Disclosure of Invention
The invention aims to provide a turning tool and a die lip turning method using the same, so as to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a turning tool is used for processing a support ring of a die lip and comprises a tool bar and tool grains, wherein a mounting groove is formed in the front end of the tool bar, the tool grains comprise a turning part and a mounting part, one end of the turning part is connected with the mounting part, the mounting part is fixed in the mounting groove, and the turning part extends out of the mounting groove; the turning part comprises an upper knife face, a front knife face and a rear knife face, a first cutting edge is formed between the upper knife face and the front knife face, a second cutting edge is formed between the upper knife face and the rear knife face, and an included angle between the front knife face and the rear knife face is 10-15 degrees.
The bottom of the mounting groove extends towards the turning part and is used for supporting the bottom surface of the turning part; the cutter arbor is inside to be equipped with the passageway, the front end of cutter arbor is equipped with the apopore, the apopore with the passageway intercommunication, the apopore orientation the turning portion of sword grain.
According to the turning processing method of the die lip of the turning tool, the die lip is formed by combining a left die and a right die, the die lip comprises a circular table part and a connecting part, the connecting part is connected to the outer side of the circular table part, a through hole is formed in the circular table part, and a support ring is arranged in the through hole; the connecting part is provided with a plurality of mounting holes; the die lip turning method is used for processing a support ring on the inner wall of the die lip, and the width/depth of the groove bottom of the support ring is less than or equal to 1/5; the method comprises the following steps:
step A, semi-finish turning, namely fixing a cast blank on a three-jaw chuck of a lathe, then carrying out semi-finish turning on the surface of the outer wall of the circular table part on one side of the connecting part, taking down a workpiece from the three-jaw chuck after turning is finished, and then carrying out semi-finish turning on the outer wall of the circular table part on the other side of the connecting part;
b, finish milling a mounting hole, fixing the workpiece after rough turning on a finish milling fixture, and then finish milling the mounting hole on the fixing part;
c, cutting a parting surface in a line mode, fixing the workpiece on a line cutting clamp, and then cutting the workpiece into left and right halves in a line cutting mode;
step D, vacuum quenching, namely putting the workpiece into a vacuum furnace for vacuum heating, then putting the workpiece into a quenching tank in the vacuum furnace for quenching, and taking the workpiece out of the vacuum furnace after quenching is finished;
e, fine grinding, namely fixing the die lip on a plane grinder, wherein the die closing surfaces of the left die and the right die are upward, and the plane grinder carries out fine grinding on each die closing surface;
step F, semi-finish turning a support ring, matching a left die and a right die, fixing the left die and the right die on a three-jaw chuck of a lathe, and turning a support ring in a through hole of a die lip by using the lathe tool, wherein the rotating speed of a main shaft of the lathe is 760-1050r/min, the tool consumption is 0.03-0.08mm, the feeding speed is 0.10-0.14mm/r, and the linear speed of turning is 60-100 m/min;
g, finely turning the support ring, and finely turning the support ring, wherein the rotating speed of a main shaft of the lathe is 950-1300r/min, the tool consumption is 0.01-0.04mm, the feeding speed is 0.02-0.07mm/r, and the linear speed of turning is 80-120 m/min;
and H, polishing, namely polishing the surface of the die lip to improve the surface finish of the die lip.
Drawings
The drawings are further illustrative of the invention and the content of the drawings does not constitute any limitation of the invention.
FIG. 1 is a schematic diagram of a turning tool according to one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a turning tool according to an embodiment of the present invention;
FIG. 3 is a schematic view of the configuration of a die lip according to one embodiment of the present invention;
FIG. 4 is a schematic left side view of a right die of the die lip of one embodiment of the present invention;
wherein: the turning tool comprises a turning tool 1, a die lip 2, a tool rod 11, a tool bit 12, a circular truncated cone part 21, a connecting part 22, a mounting groove 111, a channel 112, a water outlet hole 113, a turning part 121, a mounting part 122, a through hole 211, a support ring 212, a mounting hole 221, an upper tool surface 1211, a rake surface 1212, a first tool edge 1214, a second tool edge 1215 and an included angle alpha.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The turning tool 1 of the present embodiment is used for processing a support ring 212 of a die lip 2, and as shown in fig. 1, the turning tool includes a tool bar 11 and a tool insert 12, a mounting groove 111 is formed at a front end of the tool bar 11, the tool insert 12 includes a turning portion 121 and a mounting portion 122, one end of the turning portion 121 is connected to the mounting portion 122, the mounting portion 122 is fixed in the mounting groove 111, and the turning portion 121 extends out of the mounting groove 111; the turned part 121 comprises an upper tool surface 1211, a front tool surface 1212 and a rear tool surface, a first cutting edge 1214 is formed between the upper tool surface 1211 and the front tool surface 1212, a second cutting edge 1215 is formed between the upper tool surface 1211 and the rear tool surface, and an included angle α between the front tool surface 1212 and the rear tool surface is 10-15 °.
The existing die lip 2 is usually machined by adopting an electric spark mode, and a turning tool special for machining the support ring 212 of the die lip 2 does not exist at present; the existing turning tool is large in size and difficult to extend into the die lip 2 to machine the support ring 212, the turning tool 1 is improved aiming at the existing turning tool, wherein the turning part 121 is small in size, and the support ring 212 of the die lip 2 can be conveniently and flexibly machined.
When the included angle α between the front tool face 1212 and the rear tool face is smaller than 10 °, the tool has a smaller volume to extend into the support ring 212 for machining, but the strength of the turning part 121 is sharply reduced, the tool is easily broken in the turning process, and the service life is short; when the angle α between the rake face 1212 and the flank face is greater than 15 °, the strength of the turned part 121 is high, but it results in a large volume, inflexible machining, and large errors.
Utilize lathe tool 1 to cooperate corresponding numerical control procedure to come to carry out contour machining to support ring 212, have the advantage that machining efficiency is high and with low costs, greatly promoted the machining efficiency of die lip 2 and reduced the processing cost, can effectively practice thrift manufacturing resource, promote producer's production profit, have higher social and economic benefits.
As shown in fig. 2, the bottom of the mounting groove 111 extends toward the turned part 121 for supporting the bottom surface of the turned part 121; the inside passageway 112 that is equipped with of cutter arbor 11, the front end of cutter arbor 11 is equipped with apopore 113, apopore 113 with passageway 112 intercommunication, apopore 113 orientation the turning portion 121 of sword grain 12.
Because the included angle between the rake face 1212 and the flank face is smaller, the strength of the turning part 121 is lower, the bottom of the mounting groove 111 extends to the turning part 121, and in the turning process, the bottom of the mounting groove 111 has a better supporting effect on the turning part 121, so that the tool grain 12 is prevented from breaking due to the overlarge turning strength, and the service life of the turning tool 1 is prolonged.
In the turning process, more heat is usually generated between the turning tool 1 and a workpiece, in order to accelerate heat dissipation, cooling liquid needs to be continuously sprayed to the turning part 121 of the turning tool 1, but because the space in the die lip 2 is limited, in the process of processing the support ring 212, the turning part 121 is sprayed by using an external cooling liquid spray head, and because the cooling liquid cannot directly reach the turning part, the cooling effect is not ideal enough; according to the invention, the channel 112 of the cooling liquid is arranged in the cutter bar 11 of the turning tool 1, the water outlet 113 facing the turning part 121 of the cutter grain 12 is arranged at the front end of the cutter bar 11, when the turning is carried out, the cutter bar 11 extends into the die lip 2 along with the cutter grain 12, the cooling liquid is directly sprayed to the turning part 121, a good cooling effect can be achieved, the cooling liquid also has a flushing effect on chips generated in the turning process, and the chips in the support ring 212 can be flushed out by directly spraying the cooling liquid to the turning part 121 due to the fact that the space in the support ring 212 is small and the chip removal is difficult, so that the phenomenon that the chips accumulated in the support ring 212 influence the turning precision is avoided.
As shown in fig. 3 and 4, the die lip 2 is formed by combining a left die and a right die, the die lip 2 includes a circular table portion 21 and a connecting portion 22, the connecting portion 22 is connected to the outer side of the circular table portion 21, a through hole 211 is formed in the circular table portion 21, and a support ring 212 is arranged in the through hole 211; the connecting part 22 is provided with a plurality of mounting holes 221; the die lip turning method is used for processing the support ring 212 on the inner wall of the die lip 2, and the width/depth of the groove bottom of the support ring 212 is less than or equal to 1/5; the method comprises the following steps:
step A, semi-finish turning, namely fixing a cast blank on a three-jaw chuck of a lathe, then carrying out semi-finish turning on the outer wall surface of the circular table part 21 on one side of the connecting part 22, taking a workpiece off the three-jaw chuck after turning is finished, and then carrying out semi-finish turning on the outer wall of the circular table part 21 on the other side of the connecting part 22;
step B, finish milling the mounting hole 221, fixing the workpiece after rough turning on a finish milling fixture, and then finish milling the mounting hole 221 on the fixing part;
c, cutting a parting surface in a line mode, fixing the workpiece on a line cutting clamp, and then cutting the workpiece into left and right halves in a line cutting mode;
step D, vacuum quenching, namely putting the workpiece into a vacuum furnace for vacuum heating, then putting the workpiece into a quenching tank in the vacuum furnace for quenching, and taking the workpiece out of the vacuum furnace after quenching is finished;
e, fine grinding, namely fixing the die lip 2 on a plane grinder, wherein the die closing surfaces of the left die and the right die are upward, and the plane grinder carries out fine grinding on each die closing surface;
step F, semi-finish turning a support ring 212, matching a left die and a right die, fixing the left die and the right die on a three-jaw chuck of a lathe, and turning the support ring 212 in a through hole 211 of a die lip 2 by using the turning tool 1, wherein the rotating speed of a main shaft of the lathe is 760-1050r/min, the cutting depth is 0.03-0.08mm, the feeding speed is 0.10-0.14mm/r, and the linear speed of turning is 60-100 m/min;
g, finely turning the support ring 212, and finely turning the support ring 212, wherein the rotating speed of a main shaft of the lathe is 950-1300r/min, the tool consumption is 0.01-0.04mm, the feeding speed is 0.02-0.07mm/r, and the linear speed of turning is 80-120 m/min;
and H, polishing, namely polishing the surface of the die lip 2 to improve the surface finish of the die lip 2.
The workpiece is placed in the vacuum furnace for heating, so that the surface of the workpiece can be prevented from reacting with air to generate an oxide layer, and the workpiece is directly quenched in the vacuum furnace after being heated, so that the surface hardness and the surface finish of the workpiece can be effectively improved.
The use of turning to machine the support ring 212 can have higher machining efficiency and lower machining cost, but the amount of cutting and the linear speed of turning during machining play a crucial role in the machining quality of the support ring 212.
The cutting amount and the turning linear speed are generally determined according to the materials of the cutter and the workpiece, the machining precision and the surface roughness of the workpiece, and are process parameters for regulating the relative movement speed and the relative position between the cutter and the workpiece; the turning parameters of the support ring 212 of the die lip 2 are optimized by the turning tool 1, and when semi-finishing is carried out, in order to improve the processing speed, a relatively low rotating speed can be set to obtain a large main shaft torque, and a large tool consumption and a fast feeding speed are matched, so that high processing efficiency can be obtained; in the finish machining, in order to ensure the surface quality of the workpiece, the rotation speed needs to be increased, and the tool consumption and the feed speed need to be reduced to improve the machining precision.
Example 1:
the angle between the front cutter face 1212 and the rear cutter face of the turning tool 1 is 12 degrees;
firstly, fixing a blank of the die lip 2 on a three-jaw chuck of a lathe, and then carrying out semi-finish turning on the outer surface of the circular table part 21; after the semi-finish turning is finished, the die lip 2 is taken down from the lathe and then fixed on a finish turning clamp of the lathe, and the fixing part is subjected to finish turning of the mounting hole 221; after finishing the installation hole 221, taking the die lip 2 off the finishing fixture, fixing the die lip on a linear cutting fixture, and cutting the die lip 2 into halves left and right by linear cutting to divide the die lip 2 into a left die and a right die; after the wire cutting is finished, the left die and the right die are taken down from the wire cutting clamp, then the left die and the right die are placed in a vacuum furnace for heating, and then the left die and the right die are placed in a quenching tank in a cooling cavity in the vacuum furnace for quenching so as to improve the surface hardness and the finish degree of the left die and the right die; fixing the die assembly surfaces of the left die and the right die on a bed in an upward mode, finely grinding the die assembly surfaces, enabling the left die and the right die to have a better tightness degree during die assembly, fixing the die assembly surfaces of the left die and the right die on a finish turning fixture, and turning a support ring 212 in a through hole 211 in the middle of a die lip 2 by using the turning tool 1: semi-finish turning, firstly regulating the speed of a main shaft of a lathe to 900r/min, adjusting the tool consumption to 0.05mm, adjusting the feed speed to 0.12mm/r and the linear speed of turning to 80m/min, and after the semi-finish turning is finished, adjusting the machining parameters of the lathe to be as follows: the rotating speed of the main shaft is 1300r/min, the cutting feed is 0.03mm, the feeding speed is 0.05mm/r, and the linear speed of turning is 100 m/min; and after the turning is finished, polishing the outer wall surface of the die lip 2 to improve the surface finish.
The processing precision of the support ring 212 of the die lip 2 processed by the turning processing method is +/-0.01 mm, wherein the processing time of the step of turning the support ring 212 is 2.5 minutes, and the processing cost is 3 yuan.
Comparative example 1:
firstly, fixing a blank of the die lip 2 on a three-jaw chuck of a lathe, and then carrying out semi-finish turning on the outer surface of the circular table part 21; after the semi-finish turning is finished, the die lip 2 is taken down from the lathe and then fixed on a finish turning clamp of the lathe, and the fixing part is subjected to finish turning of the mounting hole 221; after finishing the installation hole 221, taking the die lip 2 off the finishing fixture, fixing the die lip on a linear cutting fixture, and cutting the die lip 2 into halves left and right by linear cutting to divide the die lip 2 into a left die and a right die; after the wire cutting is finished, the left die and the right die are taken down from the wire cutting clamp, then the left die and the right die are placed in a vacuum furnace for heating, and then the left die and the right die are placed in a quenching tank in a cooling cavity in the vacuum furnace for quenching so as to improve the surface hardness and the finish degree of the left die and the right die; fixing the closing surfaces of the left die and the right die on a bed in an upward manner, and finely grinding the closing surfaces to ensure that the left die and the right die have better tightness degree when closing the dies; and then, respectively enabling the matched surfaces of the left die and the right die to face upwards, fixing the matched surfaces on an electric spark machining fixture, respectively machining a half support ring 212 on the inner wall surfaces of the through holes 211 of the left die and the right die in an electric spark machining mode, and polishing the outer wall surface of the die lip 2 after the electric spark machining is finished so as to improve the surface finish.
The processing precision of the support ring 212 of the die lip 2 processed by the electric spark processing method is +/-0.04 mm, wherein the processing time of the step of turning the support ring 212 is 175 minutes, and the processing cost is 150 yuan.
As can be seen from the above embodiment 1 and the comparative embodiment, the cost of the processing by turning is about 1/50 of the cost of the electric spark processing, the processing time is about 1/437, and the precision is improved by 4 times, so that the supporting ring 212 is processed by using a car pin mode instead of the electric spark processing mode, the production efficiency is effectively improved, the production cost can be greatly reduced, the product quality is improved, and considerable social and economic benefits are achieved.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (1)
1. A turning method for a die lip is characterized in that a turning tool is used for machining, the die lip is formed by combining a left die and a right die, the die lip comprises a circular table part and a connecting part, the connecting part is connected to the outer side of the circular table part, a through hole is formed in the circular table part, and a support ring is arranged in the through hole; the connecting part is provided with a plurality of mounting holes; the lathe tool is characterized in that the lathe tool comprises a tool bar and tool grains, a mounting groove is formed in the front end of the tool bar, the tool grains comprise a turning part and a mounting part, one end of the turning part is connected with the mounting part, the mounting part is fixed in the mounting groove, and the turning part extends out of the mounting groove; the turning part comprises an upper tool face, a front tool face and a rear tool face, a first cutting edge is formed between the upper tool face and the front tool face, a second cutting edge is formed between the upper tool face and the rear tool face, an included angle between the front tool face and the rear tool face is 10-15 degrees, and the bottom of the mounting groove extends towards the turning part and is used for supporting the bottom surface of the turning part; a channel is arranged in the cutter bar, a water outlet hole is arranged at the front end of the cutter bar and communicated with the channel, and the water outlet hole faces to the turning part of the cutter grains; the die lip turning method is used for processing a support ring on the inner wall of the die lip, and the width/depth of the groove bottom of the support ring is less than or equal to 1/5; the method comprises the following steps:
step A, semi-finish turning, namely fixing a cast blank on a three-jaw chuck of a lathe, then carrying out semi-finish turning on the surface of the outer wall of the circular table part on one side of the connecting part, taking down a workpiece from the three-jaw chuck after turning is finished, and then carrying out semi-finish turning on the outer wall of the circular table part on the other side of the connecting part;
b, finish milling a mounting hole, fixing the workpiece after rough turning on a finish milling fixture, and then finish milling the mounting hole on the fixing part;
c, cutting a parting surface in a line mode, fixing the workpiece on a line cutting clamp, and then cutting the workpiece into left and right halves in a line cutting mode;
step D, vacuum quenching, namely putting the workpiece into a vacuum furnace for vacuum heating, then putting the workpiece into a quenching tank in the vacuum furnace for quenching, and taking the workpiece out of the vacuum furnace after quenching is finished;
e, fine grinding, namely fixing the die lip on a plane grinder, wherein the die closing surfaces of the left die and the right die are upward, and the plane grinder carries out fine grinding on each die closing surface;
step F, semi-finish turning a support ring, matching a left die and a right die, fixing the left die and the right die on a three-jaw chuck of a lathe, and turning a support ring in a through hole of a die lip by using the lathe tool, wherein the rotating speed of a main shaft of the lathe is 760-1050r/min, the tool consumption is 0.03-0.08mm, the feeding speed is 0.10-0.14mm/r, and the linear speed of turning is 60-100 m/min;
g, finely turning the support ring, and finely turning the support ring, wherein the rotating speed of a main shaft of the lathe is 950-1300r/min, the tool consumption is 0.01-0.04mm, the feeding speed is 0.02-0.07mm/r, and the linear speed of turning is 80-120 m/min;
and H, polishing, namely polishing the surface of the die lip to improve the surface finish of the die lip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038162.9A CN108941636B (en) | 2018-09-06 | 2018-09-06 | Turning tool and die lip turning method using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811038162.9A CN108941636B (en) | 2018-09-06 | 2018-09-06 | Turning tool and die lip turning method using same |
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| CN108941636A CN108941636A (en) | 2018-12-07 |
| CN108941636B true CN108941636B (en) | 2020-12-29 |
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| CN109434494B (en) * | 2018-12-29 | 2023-08-29 | 广东星联精密机械有限公司 | Tool clamp special for die lip machining and positioning |
| CN109894639A (en) * | 2019-04-25 | 2019-06-18 | 哈尔滨汽轮机厂有限责任公司 | A kind of lathe tool and its processing method for processing groove |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2260678Y (en) * | 1996-06-25 | 1997-08-27 | 宝山钢铁(集团)公司 | Commutator turning tool |
| JP2007260806A (en) * | 2006-03-28 | 2007-10-11 | Sumitomo Metal Ind Ltd | Cutting tool |
| JP2007290067A (en) * | 2006-04-24 | 2007-11-08 | Mitsubishi Materials Corp | Surface coated cemented carbide cutting tool having hard coating layer exhibiting excellent wear resistance in high speed cutting of soft work material hard to work |
| CN202106052U (en) * | 2011-04-29 | 2012-01-11 | 天津市隆之珠模具科技有限公司 | Welding lathe tool for production of mould |
| CN108127127A (en) * | 2016-12-01 | 2018-06-08 | 天津职业技术师范大学 | A kind of method for turning and a kind of cutter |
| CN106984840A (en) * | 2017-05-19 | 2017-07-28 | 哈尔滨理工大学 | A kind of sub-cooled lubricates special interior cold lathe tool |
| CN207071685U (en) * | 2017-08-03 | 2018-03-06 | 格鲁赛特阀门配件江苏有限公司 | A kind of valve seat waterline cutter |
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Address after: 528100 first floor of F2, No. 18-1, zone a, Southwest Park, central science and Technology Industrial Zone, Sanshui District, Foshan City, Guangdong Province (residence declaration) Patentee after: Foshan baijinyi Precision Technology Co.,Ltd. Address before: 528000 one of Shishan Industrial Park (warehouse 1), Shishan Tangtou village, Nanhai District, Foshan City, Guangdong Province Patentee before: FOSHAN BAIJINYI PRECISE MACHINERY Co.,Ltd. |