CN106984946A - A kind of grooving method of tooth rectification bracket - Google Patents

A kind of grooving method of tooth rectification bracket Download PDF

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Publication number
CN106984946A
CN106984946A CN201710181143.0A CN201710181143A CN106984946A CN 106984946 A CN106984946 A CN 106984946A CN 201710181143 A CN201710181143 A CN 201710181143A CN 106984946 A CN106984946 A CN 106984946A
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China
Prior art keywords
workpiece
groove
milling machine
horizontal
processed
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CN201710181143.0A
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Chinese (zh)
Inventor
陈建文
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Individual
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Individual
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Priority to CN201710181143.0A priority Critical patent/CN106984946A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Abstract

The drawbacks of present invention with Cutter Body Processing with Machining Center for being corrected the cost height of bracket and being processed the low precision for correcting bracket upper groove with wire cutting machine tool in the prior art, a kind of grooving method of tooth rectification bracket is provided, belong to dental aligners technology field, the grooving method of the present invention is processed using horizontal milling machine to workpiece, its processing cost is less than the processing cost of Multishaft processing center, the precision of the groove processed is higher than the precision that wire cutting machine tool is processed, correction steel wire can be completely embedded into the bottom portion of groove processed using the grooving processes of the present invention, using this technique productions dental aligners after a long time use, the abrasion produced between bottom portion of groove on correction steel wire and correction bracket is smaller, do not influence to use, so the overall stability of dental aligners can be lifted.

Description

A kind of grooving method of tooth rectification bracket
Technical field
The invention belongs to dental aligners technology field, and in particular to a kind of fluting side of tooth rectification bracket Method.
Background technology
Dental aligners are the instruments for straightening of teeth regularity, and vital effect is played in orthodontic. Dental aligners are general to be made up of correction bracket, bracket base, correction steel wire, and correction bracket is welded on the bracket base back side, rectifys Positive steel wire is arranged in the groove of correction bracket, and correction steel is installed in processing in production correction bracket, it is necessary on correction bracket The groove of silk.
In production correction bracket, added with multiaxis in the prior art in order to ensure its precision for correcting bracket Work center comes out the profile and Pocket Machining that correct bracket, and higher using the cost of Multishaft processing center for a long time.
Also have Some Enterprises at home to reduce processing cost, using wire cutting machine tool by correct bracket profile and Groove is disposably processed, and the groove of the correction bracket so processed is structure wide at the top and narrow at the bottom, bottom portion of groove both sides Chamfering in R0.09mm or so, its precision is poor, and correct steel wire section be square structure, correct steel wire corner chamfering For R0.035mm or so, when such correction steel wire is embedded in groove, correction steel wire both sides can not be completely embedded into bottom portion of groove, make With such dental aligners for a period of time after, correction bracket on bottom portion of groove both sides chamfering position and correction steel wire between It can wear and tear, correction steel wire is moved toward bottom portion of groove, this has resulted in the structure of dental aligners built on the sand, easily pine It is dynamic, it is unfavorable for the correction of tooth.
The content of the invention
The present invention is for correcting the cost height of bracket with Cutter Body Processing with Machining Center in the prior art and being added with wire cutting machine tool The drawbacks of work corrects the low precision of bracket upper groove is used sleeping there is provided a kind of grooving method of tooth rectification bracket, the grooving processes Groove on formula milling machine processing correction bracket, can effectively reduce process costs, and it is preferable to process the precision of groove.
The goal of the invention of the present invention is achieved through the following technical solutions:A kind of grooving method of tooth rectification bracket, Its step includes:
The first step:From box structure steel as indexing block, by index block lower surface be processed into an inclined plane, tilt The upper surface angulation of face and indexing block is θ °;
Second step:The workpiece of bracket is corrected as production using the stainless steel of box structure, the lower surface of workpiece is welded on point Spend the upper surface of block;
3rd step:The indexing block horizontal milling machine for being welded with workpiece is provided with to inclining on the clamp of dividing head, indexing block Inclined-plane horizontal positioned down, now the upper surface of workpiece is heeling condition, and the position of workpiece upper surface is adjusted by dividing head, is made Workpiece upper surface is provided with the Z axis workbench of disk milling cutter towards or back to horizontal milling machine, workpiece upper surface and horizontal plane institute into Angle of inclination be θ °;
4th step:Processed with disk milling cutter longitudinally disposed on horizontal milling machine in the upper surface of workpiece some it is parallel to each other and The groove laterally set along workpiece upper surface, the angle where between groove upper end and bottom between plane and workpiece upper surface For(90-θ)°.
Present invention process is used as the mounting seat of workpiece, the tilt angle theta of inclined plane using the indexing block for being provided with inclined plane According to the angle of inclination setting of correction bracket upper groove, the workpiece of box structure is welded on the upper surface of indexing block, i.e. inclined plane Tilt angle theta ° be equal to workpiece be arranged on horizontal milling machine fixture on when workpiece upper surface angle of inclination, now again with horizontal Disk milling cutter processes some grooves parallel to each other on the upper surface of workpiece on milling machine, is processed using disk milling cutter Recessed precision is higher, the data drawn by test of many times, and the chamfering on bottom portion of groove both sides is in R0.03mm or so, less than correction steel Silk R0.035mm chamfering, correction steel wire can be completely embedded into bottom portion of groove, after long-time use, correction steel wire and bottom portion of groove it Between the abrasion that produces it is smaller, do not influence to use, so the overall stability of dental aligners can be lifted.Processed using horizontal milling machine The processing cost of groove is lower relative to the cost at multiaxis NC maching center.
After the Pocket Machining on workpiece is good, under the indexing block for being welded with workpiece is dismantled from the fixture of horizontal milling machine Come, block will be indexed and be arranged on the sharp processing that correction bracket is carried out on wire cutting machine tool, and correct the profile of bracket to tooth The overall installation accuracy influence of tooth rectifier is very small, does not interfere with the stability of structure installation, and is added using wire cutting machine tool Work corrects the profile of bracket, and processing cost is also lower relative to the cost at multiaxis NC maching center.When correction bracket is processed Cheng Hou, one piece is cut away using wire cutting machine tool by workpiece upper surface, and the upper surface for making workpiece newly be formed is still flat with lower surface OK, workpiece is again placed on horizontal milling machine at once and slotted next time;Giving birth to surplus material when workpiece can not be carried out down When once slotting, remaining workpiece material on indexing block is knocked out, one piece of square cross is welded again in indexing block upper surface It is continuing with indexing block.
Preferably, when the horizontal milling machine processes groove on workpiece upper surface, the chip removal tracheae court on horizontal milling machine The Working position air blowing discharge scrap on workpiece.
Preferably, the chip removal tracheae discontinuity jet, that is, spray and stop, chip removal tracheae was every 1-3 seconds jets 2-3 seconds.It is typically all that Working position is cooled using cooling oil when processing groove using horizontal milling machine, if continuation jet Directly just flowing to the cooling oil of Working position, also spray is walked rapidly, so that the cooling-down effect that cooling oil is played is poor, to be protected Demonstrate,prove cooling-down effect, it is necessary to more cooling oils are sprayed while using low-pressure air current, so as to increase processing cost, while low-pressure air current Also it is difficult to blow away the metal fillings for being mixed with cooling oil.And discontinuity jet can make extension cooling oil rest on Working position when Between, a large amount of cooling oils can be saved, discontinuity jet can use the air-flow of more high pressure, and the metal fillings for being mixed with cooling oil is blown Walk.
Preferably, when the horizontal milling machine processes groove on workpiece upper surface, the oil cooling service pipe court on horizontal milling machine The Working position spray cooling oil cooling on workpiece.When processing groove on workpiece upper surface using horizontal milling machine, Working position Substantial amounts of heat can be produced, workpiece can be caused to aoxidize, and spraying cooling oil in time can cool to Working position, meanwhile, it is cold But oil can also prevent from being oxidized during work pieces process.
Preferably, when the disk milling cutter on the Z axis workbench of the horizontal milling machine processes groove to the inclined plane of workpiece, The length of the mobile control groove of the X-axis workbench of horizontal milling machine.
Preferably, when the disk milling cutter on the Z axis workbench of the horizontal milling machine processes groove to the inclined plane of workpiece, The horizontal range a of the mobile control adjacent grooves of the Y-axis workbench of horizontal milling machine.
Preferably, the horizontal range a between adjacent grooves is equal.The difference in height of adjacent grooves bottom is atan θ °, i.e., Horizontal range a is multiplied by tan tan θ °.When the horizontal range a between groove is equal, the location Calculation to each groove rises Come more easy and quick, advantageously reduce the programming difficulty using horizontal milling machine and wire cutting machine tool.
Preferably, the groove two ends that the horizontal milling machine is processed connect with the side on workpiece positioned at upper surface both sides It is logical.
Preferably, the indexing block is made up of No. 45 steel.
Preferably, the workpiece is made up of 304 stainless steels of medical grade.
Compared with prior art, the invention has the advantages that:The grooving method of the present invention is to use horizontal milling machine Workpiece is processed, its processing cost is less than the processing cost of Multishaft processing center, the precision of the groove processed is high The precision processed in wire cutting machine tool, correction steel wire can be completely embedded into using the present invention grooving processes process it is recessed Trench bottom, using this technique productions dental aligners after a long time use, correction steel wire with correction bracket on groove The abrasion produced between bottom is smaller, does not influence to use, so the overall stability of dental aligners can be lifted.
In summary, groove is processed using present invention process on correction bracket, the accuracy of grooves processed is higher, group The structural stability of the dental aligners loaded is more preferable.
Brief description of the drawings
Fig. 1 is the Workpiece structure schematic diagram after fluting;
Fig. 2 is enlarged drawing at A in Fig. 1;
Fig. 3 processes the structural representation of workpiece for the present invention using horizontal milling machine;
Marked in figure:1st, block is indexed, 2, inclined plane, 3, workpiece, 4, horizontal milling machine, 5, fixture, 6, disk milling cutter, 7, Z axis work Platform, 8, groove, 9, chip removal tracheae, 10, oil cooling service pipe, 11, X-axis workbench, 12, Y-axis workbench.
Embodiment
The invention will be further described for represented embodiment below in conjunction with the accompanying drawings:
Embodiment 1
As Figure 1-3, a kind of grooving method of tooth rectification bracket, its step includes:
The first step:From box structure No. 45 steel as indexing block 1, by index block 1 lower surface be processed into an inclination The upper surface angulation of face 2, inclined plane 2 and indexing block is θ °;
Second step:The workpiece 3 of bracket is corrected as production using 304 stainless steels of the medical grade of box structure, by workpiece 3 Lower surface is welded on the upper surface of indexing block 1;
3rd step:Fixture 5 of the indexing block horizontal milling machine 4 provided with dividing head 1 for being welded with workpiece 3 is clamped, on indexing block 1 The horizontal positioned down of inclined plane 2, now the upper surface of workpiece 3 is heeling condition, passes through dividing head and adjusts the upper surface of workpiece 3 Position, makes the upper surface of workpiece 3 direction or the Z axis workbench 7 of disk milling cutter 6, the upper surface of workpiece 3 is provided with back to horizontal milling machine 4 It it is θ ° with angle of inclination formed by horizontal plane;
4th step:Processed with disk milling cutter 6 longitudinally disposed on horizontal milling machine 4 in the upper surface of workpiece 3 a plurality of parallel to each other And the groove 8 laterally set along inclined-plane, the angle where between the upper end of groove 8 and bottom between plane and the upper surface of workpiece 3 For(90-θ)°.The two ends of groove 8 that the horizontal milling machine 4 is processed are connected with the side of the upper surface both sides of workpiece 3.It is adjacent recessed Horizontal range a between groove 8 is equal.The difference in height of the bottom of adjacent grooves 8 is atan θ °.The horizontal milling machine 4 is in the upper end of workpiece 3 When processing groove 8 on face, the chip removal tracheae 9 on horizontal milling machine 4 is blown towards the Working position on workpiece 3 discharges scrap, described Chip removal tracheae is discontinuity jet, that is, sprays and stop, and chip removal tracheae was every 3 seconds jets 3 seconds.Cooling on horizontal milling machine 4 Oil pipe 10 cools towards the Working position spray cooling oil on workpiece 3.
It is that workpiece upper surface and horizontal plane angulation are θ °, the level of adjacent grooves 8 to index block top incline angle, θ ° Height difference atan θ ° three's component values apart from a and the bottom of adjacent grooves 8:
When disk milling cutter 6 on the Z axis workbench 7 of the horizontal milling machine 4 processes groove 8 to the upper surface of workpiece 3, horizontal milling machine The length of the mobile control groove 8 of 4 X-axis workbench 11, the mobile control adjacent grooves 8 of the Y-axis workbench 11 of horizontal milling machine 4 Horizontal range a.
When horizontal milling machine 4 processes the groove 8 of workpiece upper surface, the control disk milling cutter 6 of Z axis workbench 7 is moved down, and passes through control Depth of cut processed controls the depth of groove 8, and then fixture 5 is moved with X-axis workbench 11, and now disk milling cutter 6 is along workpiece 3 Upper surface laterally processes groove 8, then the control of Z axis workbench 7 withdrawing of disk milling cutter 6, and fixture 5 is moved with Y-axis workbench 12 It is the horizontal range between adjacent grooves 8 apart from a, it is recessed that Article 2 is processed in the control disk milling cutter of Z axis workbench 7 feed 6 apart from a Groove 8, up to processing the institute fluted 8 on the upper surface of workpiece 3.
The workpiece 3 of three batches is detected after cross-notching in actual production, wherein, first batch totally three hundred, The chamfering on the bottom both sides of groove 8 has 4 for R0.029mm's, and the chamfering on the bottom both sides of groove 8 has 135 for R0.030mm, The chamfering on the bottom both sides of groove 8 has 98 for R0.031mm's, and the chamfering on the bottom both sides of groove 8 has 63 for R0.032mm. Second batch totally two hundred, the chamfering on the bottom both sides of groove 8 has 29, the chamfering on the bottom both sides of groove 8 for R0.029mm There are 122mm parts for R0.030, the chamfering on the bottom both sides of groove 8 has 39, the chamfering on the bottom both sides of groove 8 for R0.031mm There are 10 for R0.032mm.3rd batch totally three hundred, the chamfering on the bottom both sides of groove 8 has 33 for R0.029mm, The chamfering on the bottom both sides of groove 8 has 119 for R0.030mm's, and the chamfering on the bottom both sides of groove 8 has 103 for R0.031mm Part, the chamfering on the bottom both sides of groove 8 has 10 for R0.032mm, and the chamfering on the bottom both sides of groove 8 has 25 for R0.033mm Part, the chamfering on the bottom both sides of groove 8 has 10 for R0.034mm.By detection, correction bracket is processed using the present invention The chamfering of the groove 8 come is R0.030mm or so, and its error is in 0.004mm, and the chamfering of groove 8 is both less than falling for correction steel wire Angle R0.035mm, can reach expected invention effect.
Specific embodiment described in text is only to spirit explanation for example of the invention.The technical field of the invention Technical staff described specific embodiment can be made it is various modification supplement or using similar mode substitute, But without departing from the spiritual of the present invention or surmount scope defined in appended claims.

Claims (10)

1. a kind of grooving method of tooth rectification bracket, its step includes:
The first step:Indexing block is used as from the steel of box structure(1), an inclined plane is processed into the lower surface for indexing block (2), inclined plane(2)With indexing the upper surface angulation of block for θ °;
Second step:The workpiece of bracket is corrected as production using the stainless steel of box structure(3), the lower surface of workpiece is welded on Index the upper surface of block;
3rd step:The indexing block horizontal milling machine of workpiece will be welded with(4)It is provided with the fixture of dividing head(5)Clamp, index block On the face-down horizontal positioned of inclination, now the upper surface of workpiece is heeling condition, passes through dividing head and adjusts workpiece upper surface Position, makes workpiece upper surface towards or back to horizontal milling machine provided with disk milling cutter(6)Z axis workbench(7), workpiece upper surface It it is θ ° with angle of inclination formed by horizontal plane;
4th step:Processed with disk milling cutter longitudinally disposed on horizontal milling machine in the upper surface of workpiece some it is parallel to each other and The groove laterally set along workpiece upper surface(8), where between groove upper end and bottom between plane and workpiece upper surface Angle is(90-θ)°.
2. the grooving method of a kind of tooth rectification bracket according to claim 1, it is characterised in that the horizontal milling machine exists When processing groove on workpiece upper surface, the chip removal tracheae on horizontal milling machine(9)Being blown towards the Working position on workpiece, it is useless to discharge Bits.
3. the processing method of a kind of tooth rectification bracket according to claim 2, it is characterised in that between the chip removal tracheae Disconnected property jet.
4. the processing method of a kind of tooth rectification bracket according to claim 3, it is characterised in that the chip removal tracheae is every Every 1-3 seconds jets 2-3 seconds.
5. the grooving method of a kind of tooth rectification bracket according to claim 1-4 any one, it is characterised in that described When horizontal milling machine processes groove on workpiece upper surface, the oil cooling service pipe on horizontal milling machine(10)Towards the Working position on workpiece Spray cooling oil cooling.
6. the grooving method of a kind of tooth rectification bracket according to claim 1, it is characterised in that the horizontal milling machine When disk milling cutter on Z axis workbench processes groove to the upper surface of workpiece, the X-axis workbench of horizontal milling machine(11)Mobile control The length of groove processed.
7. a kind of grooving method of tooth rectification bracket according to claim 1 or 6, it is characterised in that the horizontal milling When disk milling cutter on the Z axis workbench of bed processes groove to the upper surface of workpiece, the Y-axis workbench of horizontal milling machine(12)Shifting The horizontal range a of dynamic control adjacent grooves.
8. the grooving method of a kind of tooth rectification bracket according to claim 7, it is characterised in that between adjacent grooves Horizontal range a is equal.
9. the grooving method of a kind of tooth rectification bracket according to claim 8, it is characterised in that adjacent grooves bottom Difference in height is atan θ °.
10. a kind of grooving method of tooth rectification bracket according to claim 1, it is characterised in that the horizontal milling machine The groove two ends processed are connected with the side on workpiece positioned at upper surface both sides.
CN201710181143.0A 2017-03-24 2017-03-24 A kind of grooving method of tooth rectification bracket Pending CN106984946A (en)

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CN201710181143.0A CN106984946A (en) 2017-03-24 2017-03-24 A kind of grooving method of tooth rectification bracket

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108620829A (en) * 2018-05-15 2018-10-09 金华市格蓝姆医疗器械科技有限公司 A kind of orthodontic bracket production technology

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1851966A (en) * 2006-03-17 2006-10-25 上海攀业氢能源科技有限公司 Method batching processing fuel-cell graphite board flow-field
CN201389650Y (en) * 2009-03-20 2010-01-27 常州天山重工机械有限公司 Clamping fixture used for assisting radial drilling machine in processing inclined holes
CN201470963U (en) * 2009-07-30 2010-05-19 中冶陕压重工设备有限公司 Processing device of tooth space of scrap scissors drum
CN101982270A (en) * 2010-11-04 2011-03-02 广东省韶铸集团有限公司 Method for machining P frame by utilizing common boring machine in 3-D angle
KR20120076249A (en) * 2010-12-29 2012-07-09 전영선 Tip fixed device of cuttling machine
CN203330748U (en) * 2013-07-15 2013-12-11 株洲齿轮有限责任公司 Milling oil groove clamp of planet gear
CN105773234A (en) * 2016-05-23 2016-07-20 哈尔滨工大服务机器人有限公司 Tool clamp for machining slope of Mecanum wheel hub

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1851966A (en) * 2006-03-17 2006-10-25 上海攀业氢能源科技有限公司 Method batching processing fuel-cell graphite board flow-field
CN201389650Y (en) * 2009-03-20 2010-01-27 常州天山重工机械有限公司 Clamping fixture used for assisting radial drilling machine in processing inclined holes
CN201470963U (en) * 2009-07-30 2010-05-19 中冶陕压重工设备有限公司 Processing device of tooth space of scrap scissors drum
CN101982270A (en) * 2010-11-04 2011-03-02 广东省韶铸集团有限公司 Method for machining P frame by utilizing common boring machine in 3-D angle
KR20120076249A (en) * 2010-12-29 2012-07-09 전영선 Tip fixed device of cuttling machine
CN203330748U (en) * 2013-07-15 2013-12-11 株洲齿轮有限责任公司 Milling oil groove clamp of planet gear
CN105773234A (en) * 2016-05-23 2016-07-20 哈尔滨工大服务机器人有限公司 Tool clamp for machining slope of Mecanum wheel hub

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108620829A (en) * 2018-05-15 2018-10-09 金华市格蓝姆医疗器械科技有限公司 A kind of orthodontic bracket production technology

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Application publication date: 20170728