CN104983487A - Method for conducting laser shock micro-shaping on titanium alloy artificial acetabular cup - Google Patents
Method for conducting laser shock micro-shaping on titanium alloy artificial acetabular cup Download PDFInfo
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- CN104983487A CN104983487A CN201510418547.8A CN201510418547A CN104983487A CN 104983487 A CN104983487 A CN 104983487A CN 201510418547 A CN201510418547 A CN 201510418547A CN 104983487 A CN104983487 A CN 104983487A
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Abstract
The invention discloses a method for conducting laser shock micro-shaping on a titanium alloy artificial acetabular cup. The method includes the following steps that (1) the region prone to wear of the bottom of the titanium alloy acetabular cup is polished, cleaned with alcohol and dried, and a layer of black paint is sprayed on the region prone to wear to serve as an energy absorption layer; (2) the titanium alloy acetabular cup is arranged on a workbench, parameters of a laser device are set, and the region prone to wear of the bottom of the titanium alloy acetabular cup is irradiated with laser beams through a focusing lens, and micro pits are formed; (3) micro pit arrays are machined in the bottom face of the titanium alloy acetabular cup through the laser device by moving the workbench; (4) the black paint on the surface of the titanium alloy acetabular cup is removed, and the micro-shaping surface is cleaned through ultrasonic waves. According to the method, the adopted laser shock micro-shaping technology belongs to cold machining surface treatment, no other chemical components need to be introduced, and no side effect on people exists; compared with current artificial acetabular cups, the wear resistance of the bottom of the titanium alloy artificial acetabular cup obtained through laser shock micro-shaping is improved remarkably.
Description
Technical field
The present invention relates to a kind of method of laser-impact micro forming titanium alloy artificial hip joint mortar cup, belong to medical science Orthopeadic Surgery implant field.
Background technology
Chinese population has progressed into the aging stage now, along with the senescence of human body and various disease, wound are on the impact of human hip, cause hip joint partial function or all damages inefficacy, causing the ability to act of patient to be seriously restricted.Modern medicine addresses this problem, normally adopt operation carry out artificial joint displacement, be referred to as artificial joint replacement.Not only can be eliminated the pain in joint by the method thoroughly, and the normal function in joint can be recovered, enable patient be engaged in daily routines easily, drop in normal life and work.
The major part activity of human body all be unable to do without hip joint, is one of joint that load is larger, all be unable to do without hip joint as walked in daily life, sitting, run, jump.The features such as hip joint motion frequency is high, load is large, therefore clinical research finds that its pathological changes rate is also high.To sum up state the feature of hip joint, it is very important that artificial prosthesis hip joint has good anti-wear performance, otherwise may cause joint mobilization due to fretting wear.In present stage, critical problem is exactly the wearability problem how strengthening artificial hip joint mortar cup.
Artificial hip joint mortar cup replaces human hip in hip joint, is combined to form moves and the loading end of load with artificial femur bulb.Artificial hip joint mortar cup is primarily of manufactures such as titanium alloy, pottery, vitallium, plastics.In clinical practical application, the anti-wear performance of artificial hip joint mortar cup directly affects the performance of artificial hip joint.Mostly chemistry or heat treatment process method is adopted in traditional medical titanium alloy modification technology, as the artificial hip joint cuplike cotyle (patent No.: 201310057757.X) of Shanghai University Hua Zikai, processing conditions is harsh, and adopts chemically treated method may cause the pathological changes of tissue.Adopt plasma spraying technology to prepare coating at material surface, effectively can reduce skin-friction coefficient, but easy cracking not high with substrate combinating strength.Adopt ion implantation technique to prepare modified layer and improve anti-wear performance, but containing harmful chemical element, the pathological changes of surrounding tissue may be caused in the abrasive particle produced.In addition; once after artificial hip joint implant into body, due to above-mentioned defect causes hip joint can not normal activity, need to carry out second operation to patient; this will bring serious misery and expensive medical expense to patient, therefore the anti-wear performance of medical titanium alloy artificial hip joint mortar cup need solve.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of method of laser-impact micro forming titanium alloy artificial hip joint mortar cup, adopt laser-impact micro forming technology to belong to cold working surface treatment, do not need to introduce other chemical compositions, without any side effects to human body.
Technical scheme: for achieving the above object, the method for a kind of laser-impact micro forming titanium alloy artificial hip joint mortar cup of the present invention, this processing unit (plant) comprises laser instrument, condenser lens and workbench, comprises the following steps:
(1) by region easy to wear polishing bottom titanium alloy mortar cup, then clean and dry with alcohol washes, spray one deck in region easy to wear pitch-dark as energy-absorbing layer;
(2) titanium alloy mortar cup is installed on the table, energy-absorbing layer is provided with restraint layer, laser parameter is set, optical maser wavelength 532nm, single-pulse laser energy 0J<E<2J, pulse width 8ns, repetition rate 1 ~ 10Hz, spot diameter 0mm<d≤1mm, laser is radiated at region easy to wear bottom titanium alloy mortar cup by condenser lens and forms nick hole;
(3) mobile working platform is passed through, laser instrument processes micro-pit array in titanium alloy mortar cup bottom surface, micro-pit array with the bottom centre of artificial hip joint mortar cup for the center of circle, and by perpendicular to linearly centered by the straight line in the center of circle circularizing array bottom artificial hip joint;
(4) remove titanium alloy mortar cup surface pitch-dark, utilize ultrasonic waves for cleaning micro forming surface.
As preferably, in described step (2), restraint layer is water, and thickness is 3mm.
As preferably, the distance 0<L<3d in described step (3) between annular array adjacent ring.
In the present invention, the artificial hip joint mortar cup of processing can improve the wearability problem of the artificial hip joint mortar cup that medical titanium alloy is made significantly, and improve the greasy property of its friction pair, reduce the probability of abrasive particle generation and the generation of vibrations, add the service life of artificial hip joint.Above-mentioned laser-impact micro forming region is mainly distributed in the region easy to wear bottom the inner surface of artificial hip joint mortar cup, with the bottom centre of artificial hip joint mortar cup for the center of circle, and by perpendicular to linearly centered by the straight line in the center of circle circularizing array bottom artificial hip joint, form circular antifriction antiwear band, distance L between adjacent endless band is 0<L<3d, d is spot diameter.
Principle of the present invention: carry out laser-impact micro forming at the inner surface easy to wear of artificial hip joint mortar cup, obtained refinement by the crystal grain of the mortar cup region coating metal of laser-impact micro forming, the refinement of crystal grain and anti-wear performance have direct relation; Secondly the small nick hole of laser-impact micro forming as the memorizer of joint fluid, can prevent the generation of dry friction; Last in middling speed or when walking fast, the probability of happening of elastohydrodynamic lubrication in hip joint friction pair can be increased.By the present invention, effectively can improve the anti-wear performance of artificial hip joint mortar cup, prevent dry friction, increase wettability, reduce the generation of friction pair vibrations, increase the service life of hip joint.
Beneficial effect: the method for laser-impact micro forming titanium alloy artificial hip joint mortar cup of the present invention, compared to existing technology, has the following advantages:
1. the present invention adopts laser-impact micro forming technology to belong to cold working surface treatment, does not need to introduce other chemical compositions, without any side effects to human body.
2. laser-impact micro forming titanium alloy artificial hip joint mortar cup is compared with current manual's hip cotyle cup, significantly improves the anti-wear performance bottom mortar cup.
3. laser-impact micro forming titanium alloy artificial hip joint mortar cup, nick hole as the memorizer of joint fluid, can prevent the generation of dry friction, significantly improves the generation of hydrodynamic lubrication, reduce vibrations when middling speed or quick walking.
4. laser-impact micro forming titanium alloy artificial hip joint mortar cup, the nick hole that micro forming produces also as the catcher of abrasive particle, can reduce abrasive wear, improves the service life of mortar cup.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present invention;
Fig. 2 is the structural representation of the present invention's finished artificial hip joint mortar cup;
Fig. 3 is processing unit (plant) schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, principle of the present invention: be provided with target 5 on workbench 11, the top of target 5 is provided with laser instrument 10, the laser beam 2 that laser instrument 10 is launched is radiated on target 5 by condenser lens 1, target 5 is provided with successively energy-absorbing layer 4 and restraint layer 3, laser forms nick hole 6 by shock wave 7 on the surface of target 5.
As shown in Figure 3, processing unit (plant) of the present invention comprises laser instrument 10, condenser lens 1 and workbench 11, and the laser beam 2 that laser instrument 10 occurs is radiated at the region easy to wear 9 of the hip cotyle cup 8 on workbench 11 by condenser lens 1.
A method for laser-impact micro forming titanium alloy artificial hip joint mortar cup, comprises the following steps:
(1) by region 9 polishing easy to wear bottom titanium alloy mortar cup, then clean and dry with alcohol washes, spray one deck in region 9 easy to wear pitch-dark as energy-absorbing layer 4;
(2) be arranged on workbench 11 by titanium alloy mortar cup, energy-absorbing layer 4 is provided with restraint layer 3, restraint layer 3 thickness is 3mm, laser instrument 10 parameter is set, optical maser wavelength 532nm, single-pulse laser energy 1J, pulse width 8ns, repetition rate 1 ~ 10Hz, spot diameter 0.6mm, laser is radiated at region 9 easy to wear bottom titanium alloy mortar cup by condenser lens 1 and forms nick hole, and micro-pit shape is little hemispherical, pit diameter at 100-300 μm, pit depth 1-30 μm;
(3) by mobile working platform, laser instrument 10 processes nick in titanium alloy mortar cup bottom surface and cheats 6 arrays, and nick cheats 6 array circular array;
(4) remove titanium alloy mortar cup surface pitch-dark, utilize ultrasonic waves for cleaning micro forming surface, artificial hip joint mortar cup 8 as shown in Figure 2.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a method for laser-impact micro forming titanium alloy artificial hip joint mortar cup, the processing unit (plant) of the method comprises laser instrument, condenser lens and workbench, comprises the following steps:
(1) by region easy to wear polishing bottom titanium alloy mortar cup, then clean and dry with alcohol washes, spray one deck in region easy to wear pitch-dark as energy-absorbing layer;
(2) titanium alloy mortar cup is installed on the table, energy-absorbing layer is provided with restraint layer, laser parameter is set, optical maser wavelength 532nm, single-pulse laser energy 0J<E<2J, pulse width 8ns, repetition rate 1 ~ 10Hz, spot diameter 0mm<d≤1mm, laser is radiated at region easy to wear bottom titanium alloy mortar cup by condenser lens and forms nick hole, micro-pit shape is little hemispherical, pit diameter at 100-300 μm, pit depth 1-30 μm;
(3) mobile working platform is passed through, laser instrument processes micro-pit array in titanium alloy mortar cup bottom surface, micro-pit array with the bottom centre of artificial hip joint mortar cup for the center of circle, and by perpendicular to linearly centered by the straight line in the center of circle circularizing array bottom artificial hip joint;
(4) remove titanium alloy mortar cup surface pitch-dark, utilize ultrasonic waves for cleaning micro forming surface.
2. the method for laser-impact micro forming titanium alloy artificial hip joint mortar cup according to claim 1, is characterized in that: in described step (2), restraint layer is water, and thickness is 3mm.
3. the method for laser-impact micro forming titanium alloy artificial hip joint mortar cup according to claim 1, is characterized in that: the distance 0<L<3d in described step (3) between annular array adjacent ring.
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| CN201510418547.8A CN104983487A (en) | 2015-07-16 | 2015-07-16 | Method for conducting laser shock micro-shaping on titanium alloy artificial acetabular cup |
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| CN201510418547.8A CN104983487A (en) | 2015-07-16 | 2015-07-16 | Method for conducting laser shock micro-shaping on titanium alloy artificial acetabular cup |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103427B (en) * | 2017-11-14 | 2020-07-28 | 广东工业大学 | Laser shock strengthening method and device for β -type medical titanium alloy bone fracture plate for long bone fracture |
| CN112303125A (en) * | 2020-11-02 | 2021-02-02 | 江苏科技大学 | Sliding bearing with micro-modeling on surface and preparation method thereof |
| CN114799532A (en) * | 2022-05-09 | 2022-07-29 | 吉林大学 | Method for preparing high-quality amorphous alloy micro-pits by combining laser irradiation with wax sealing polishing |
-
2015
- 2015-07-16 CN CN201510418547.8A patent/CN104983487A/en active Pending
Non-Patent Citations (1)
| Title |
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| 任旭东 等: ""激光参数对Ti6Al4V钛合金激光冲击成形的影响"", 《中国有色金属学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103427B (en) * | 2017-11-14 | 2020-07-28 | 广东工业大学 | Laser shock strengthening method and device for β -type medical titanium alloy bone fracture plate for long bone fracture |
| CN112303125A (en) * | 2020-11-02 | 2021-02-02 | 江苏科技大学 | Sliding bearing with micro-modeling on surface and preparation method thereof |
| CN114799532A (en) * | 2022-05-09 | 2022-07-29 | 吉林大学 | Method for preparing high-quality amorphous alloy micro-pits by combining laser irradiation with wax sealing polishing |
| CN114799532B (en) * | 2022-05-09 | 2023-01-24 | 吉林大学 | Method for preparing high-quality amorphous alloy micro-pits by combining laser irradiation with wax sealing polishing |
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Application publication date: 20151021 |