CN105619779B - 钛合金与超高分子量聚乙烯的连接方法和接头及其应用 - Google Patents

钛合金与超高分子量聚乙烯的连接方法和接头及其应用 Download PDF

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CN105619779B
CN105619779B CN201610102636.6A CN201610102636A CN105619779B CN 105619779 B CN105619779 B CN 105619779B CN 201610102636 A CN201610102636 A CN 201610102636A CN 105619779 B CN105619779 B CN 105619779B
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titanium alloy
ultra
molecular weight
high molecular
weight polyethylene
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CN105619779A (zh
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陈科
陈滨熹
单爱党
张善勇
杨驰
郑吉驷
沈佩
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Shanghai Jiaotong University
Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
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Shanghai Jiaotong University
Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • B29C65/0681—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding created by a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/44—Joining a heated non plastics element to a plastics element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/30322—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined making use of protrusions belonging to at least one of the parts to be joined in the form of rugosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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Abstract

本发明公开了一种钛合金与超高分子量聚乙烯的连接方法，该连接方法包括：使钛合金与超高分子量聚乙烯接触，通过旋转工具下压钛合金表面，使得旋转工具与钛合金表面之间产生热量，生成的热量通过钛合金传导至钛合金与超高分子量聚乙烯的界面，在旋转工具的压力和热量的作用下，钛合金与超高分子量聚乙烯连接。本发明还提供了一种上述连接方法获得的钛合金与超高分子量聚乙烯的连接接头以及该连接接头在生物医学中的应用。本发明的钛合金与超高分子量聚乙烯的连接方法实施简便、有效可靠、能够满足不同厚度的构件。

Description

钛合金与超高分子量聚乙烯的连接方法和接头及其应用
技术领域
本发明涉及一种钛合金与超高分子量聚乙烯的连接方法，以及由该方法得到的钛合金与超高分子量聚乙烯的连接接头。
背景技术
在金属材料与塑料材料的连接中，常见的方式有机械连接、粘合剂粘接和焊接。
机械连接的强度虽然很高，但有着一定应用场景的限制，比如密封性不好。同时也需要对接头进行特殊的结构设计或使用铆钉，生产成本较高。
粘合剂粘接的方法对使用的环境温度有较高的要求，且对于表面张力较低的塑料无法获得很好的强度。
焊接的方法主要是通过使接头界面处的塑料熔融并施以一定的压力形成连接。目前主要通过激光焊接、超声波焊接、感应加热焊接、搅拌摩擦焊接，等等。激光焊接会在界面处产生气泡，影响接头的强度；超声波焊接无法对厚度厚的构件进行连接；感应加热焊接在接头形状与尺寸上有着限制；搅拌摩擦焊接的方法可以解决以上问题。
公布号为CN103391828A的中国专利公开了一种金属构件与塑料构件的接合方法，涉及到搅拌摩擦焊接的方法，该方法限制了旋转工具的轴线相对于金属构件表面法线的倾斜角θ满足0°<θ≤5°，并限制了旋转工具的顶端面的直径D和金属构件的厚度t满足5t≤D≤20t的条件，因而存在一定的局限性。
发明内容
有鉴于现有技术的上述缺陷，本发明所要解决的技术问题是提供一种改进的、实施难度降低的、有效的、满足不同厚度构件的钛合金与超高分子量聚乙烯的连接方法。
为实现上述目的，本发明提供了一种钛合金与超高分子量聚乙烯(分子量150万以上)的连接方法，该方法包括：
使钛合金与超高分子量聚乙烯接触，通过旋转工具下压钛合金表面，使得旋转工具与钛合金表面之间产生热量，生成的热量通过钛合金传导至钛合金与超高分子量聚乙烯的界面，在旋转工具的压力和热量的作用下，钛合金与超高分子量聚乙烯连接。
进一步地，旋转工具下压时，旋转工具的轴线相对于钛合金表面的法线的倾斜角被设置为大于或等于0°。
进一步地，旋转工具与钛合金表面之间产生的热量来源于旋转工具与钛合金的摩擦生热和旋转工具与钛合金相互作用带来的钛合金塑性变形的生热。
更进一步地，旋转工具与钛合金表面之间产生的热量能够通过钛合金的传导使得钛合金与超高分子量聚乙烯的界面处的温度高于或等于超高分子量聚乙烯的熔融温度，从而使得钛合金与超高分子量聚乙烯的界面处的超高分子量聚乙烯处于流动状态。
更进一步地，旋转工具与钛合金表面之间产生的热量能够通过钛合金的传导使得钛合金与超高分子量聚乙烯的界面处的温度低于钛合金的熔点。
进一步地，旋转工具与钛合金表面之间产生的热量的大小通过调整旋转工具的转速、停留时间、下压量、线焊时的走速等工艺参数实现。
进一步地，在钛合金与超高分子量聚乙烯接触之前，对钛合金的一侧进行表面处理，使得钛合金的一侧具有粗糙表面，然后使钛合金的粗糙表面和超高分子量聚乙烯接触。
更进一步地，通过三维打印技术使得钛合金的一侧具有粗糙表面。
进一步地，通过三维打印技术使得钛合金的三维打印表面的多孔孔径为50μm～3mm。
更进一步地，通过机械加工、化学侵蚀等使得钛合金的一侧具有粗糙表面。
进一步地，钛合金的粗糙表面的粗糙度小于Ra500。进一步地，旋转工具为回转体。
进一步地，旋转工具与钛合金表面相互作用的顶端呈圆形，顶端面具有纹路，该纹路使得旋转工具在旋转过程中将被压材料往顶端面的中心收集。
更进一步地，旋转工具的顶端面突出设置有直径比该顶端面的直径小的探头。
进一步地，钛合金的表面形状、超高分子聚乙烯的表面形状、钛合金与超高分子聚乙烯的界面处的形状为平面或其它任意形状。
进一步地，钛合金与超高分子聚乙烯的界面处的形状为曲面。
进一步地，旋转工具的运动方式为：旋转工具下压至钛合金表面，保持位置不变，停留合适的加热时间(比如30s～90s)后抬起。
进一步地，旋转工具的运动方式为：旋转工具下压至钛合金表面，然后沿钛合金表面移动，移动的方向始终与钛合金表面的法线方向垂直，直到覆盖所需的连接区域，最后旋转工具抬起。
本发明还提供了一种钛合金与超高分子量聚乙烯的连接接头，该连接接头通过上述钛合金与超高分子量聚乙烯的连接方法获得。
本发明还提供了一种上述钛合金与超高分子量聚乙烯的连接接头在生物医学上的应用，比如在颞下颌关节置换假体中的应用。钛合金与超高分子量聚乙烯都是常见的生物医用材料，两者的连接具有重要的意义。例如，在颞下颌关节置换假体中，关节窝常采用超高分量聚乙烯，颧弓固定部常采用钛合金，两者需要有效可靠的连接。常规的机械连接方法容易在使用过程中产生微动，且假体中不允许随意添加粘合剂。而本发明的连接方法能够实现钛合金与超高分子量聚乙烯的有效可靠的连接。但本发明的上述钛合金与超高分子量聚乙烯的连接接头不限于应用在颞下颌关节置换假体中。
与现有技术相比，本发明的钛合金与超高分子量聚乙烯的连接方法具有以下优点：
(1)本发明可以通过三维打印技术直接获得具有一定表面粗糙度的钛合金粗糙表面，而现有技术通过其它方式或阳极氧化处理来获得粗糙表面，过程复杂且效果较差。
(2)本发明通过对旋转工具与钛合金接触的顶端面的结构设计，使其具有纹路，即可满足0°连接(即旋转工具的轴线相对于钛合金表面的法线的倾斜角可以为0°)，降低了连接方法的实施难度、提高了接头表面质量。
(3)本发明对旋转工具的顶端面的直径和钛合金的厚度没有限制，通过调整旋转工具的转速、停留时间、下压量、线焊时的走速等工艺参数来调整热量的生成，因而能够满足不同厚度的构件的连接条件。本发明还对钛合金与超高分子量聚乙烯的界面的形状没有限制，可用于两者的非平面连接面(比如曲面连接面)。
以下将结合附图对本发明的构思、具体结构及产生的技术效果作进一步说明，以充分地了解本发明的目的、特征和效果。
附图说明
图1是本发明的一个较佳实施例的钛合金与超高分子量聚乙烯连接之前的立体图；
图2是本发明的一个较佳实施例的钛合金与超高分子量聚乙烯处于连接过程中的立体图；
图3是图2中的截面图；
图4是本发明的另一个较佳实施例的钛合金与超高分子量聚乙烯处于连接过程中截面图。
具体实施方式
如图1～3所示，本发明的一个较佳实施例提供了一种钛合金与超高分子量聚乙烯的连接方法，包括一种钛合金与超高分子量聚乙烯的连接方法，该方法包括：使钛合金2与超高分子量聚乙烯3接触，通过旋转工具1下压钛合金表面4，使得旋转工具1与钛合金表面4之间产生热量，生成的热量通过钛合金2传导至钛合金2与超高分子量聚乙烯3的界面，在旋转工具1的压力和热量的作用下，钛合金2与超高分子量聚乙烯3连接形成连接部6。图1中箭头5表示旋转工具的上下移动方向，图2中的箭头9表示旋转工具在铝合金2表面的移动方向。
本实施例中，旋转工具1下压时，旋转工具1的轴线7相对于钛合金表面4的法线的倾斜角优选地被设置为等于0°。在其它实施例中也可以设置为大于0°。
旋转工具1与钛合金表面4之间产生的热量来源于旋转工具1与钛合金2的摩擦生热和旋转工具1与钛合金2相互作用带来的钛合金塑性变形的生热。该热量的大小通过调整旋转工具1的转速、停留时间、下压量、线焊时的走速等工艺参数实现。旋转工具1与钛合金表面4之间产生的热量能够通过钛合金2的传导使得钛合金2与超高分子量聚乙烯3的界面处的温度高于或等于超高分子量聚乙烯的熔融温度，从而使得钛合金2与超高分子量聚乙烯3的界面处的超高分子量聚乙烯3处于流动状态。同时，钛合金2与超高分子量聚乙烯3的界面处的温度低于钛合金2的熔点。
本实施例中，钛合金2与超高分子量聚乙烯3的界面处的形状为曲面，在其它实施例中，也可以为平面或其它形状。
本实施例中，在钛合金2与超高分子量聚乙烯3接触之前，优选地通过三维打印技术对钛合金2的一侧进行表面处理，使得钛合金2的一侧具有粗糙表面，钛合金2的三维打印表面的多孔孔径为50μm～3mm。然后使钛合金2的粗糙表面和超高分子量聚乙烯接触。在其它实施例中，也可以通过机械加工、化学侵蚀等使得钛合金2的一侧具有粗糙表面。
本实施例中，旋转工具1为回转体。旋转工具1与钛合金表面4相互作用的顶端呈圆形，顶端面具有纹路8(见图1)，该纹路8使得旋转工具1在旋转过程中将被压材料往顶端面的中心收集。
钛合金2的表面形状、超高分子聚乙烯3的表面形状、钛合金2与超高分子聚乙烯3的界面形状优选地为平面，但不限于平面，在其它实施例中也可以为其它任意形状。
旋转工具1的运动方式包括两种：(1)旋转工具1下压至钛合金表面4，保持位置不变，停留合适的加热时间(比如30s～90s)后抬起，该焊接方式为电焊。(2)旋转工具1下压至钛合金表面4，然后沿钛合金表面4移动，移动的方向始终与钛合金表面的法线方向垂直，直到覆盖所需的连接区域，最后旋转工具1抬起，该焊接方式为线焊或面焊。
本实施例的连接方法能够实现钛合金与超高分子量聚乙烯的有效可靠的连接。本实施例的连接方法得到的钛合金与超高分子量聚乙烯的连接接头可用于颞下颌关节置换假体等相关生物医学领域中。
在本发明的另一较佳实施例中，旋转工具1的顶端面突出设置有直径比该顶端面的直径小的探头10，如图4所示。当旋转工具1旋转时，该探头10也与旋转工具1一体地旋转。当旋转工具1的顶端面被按压于铝合金表面4时，旋转着的探头10被埋入铝合金2中，因而，旋转工具1对铝合金2发生作用产生的热量除了包括其顶端面按压于铝合金2表面产生的摩擦热外，还包括探头10对铝合金2进行搅拌而产生的摩擦热。探头10的截面形状为圆形、椭圆形、多角形等。
实施例1：
按照上述较佳实施例中的连接方法将经过机械打磨处理形成粗糙表面的钛合金板与超高分子量聚乙烯板连接，钛合金与超高分子量聚乙烯的连接处为非平面(比如曲面)，焊接方式为线焊。
其中，钛合金板尺寸为60mm*20mm*2.7mm(长*宽*厚度)，超高分子量聚乙烯尺寸为60mm*20mm*4.7mm(长*宽*厚度)。旋转工具的顶端直径为10mm，转速为755rpm，旋转工具下压至钛合金表面0.5mm。旋转工具的移动速度为50mm/min，移动距离为15mm。钛合金与超高分子量聚乙烯的连接过程中的温度高于超高分子量聚乙烯的熔融温度。
本实施例得到的钛合金与超高分子量聚乙烯的连接接头的拉伸剪切强度475N，断裂发生在钛合金与超高分子量聚乙烯的界面。
实施例2：
按照上述较佳实施例中的连接方法将经过机械打磨处理形成粗糙表面的钛合金板与超高分子量聚乙烯板连接，焊接方式为线焊。
其中，钛合金板尺寸为60mm*20mm*2.7mm(长*宽*厚度)，超高分子量聚乙烯尺寸为60mm*20mm*4.7mm(长*宽*厚度)。旋转工具的顶端直径为10mm，转速为755rpm，旋转工具下压至钛合金表面0.5mm。旋转工具的移动速度为30mm/min，移动距离为15mm。钛合金与超高分子量聚乙烯的连接过程中的温度高于超高分子量聚乙烯的熔融温度。
本实施例得到的钛合金与超高分子量聚乙烯的连接接头的拉伸剪切强度946N，断裂发生在钛合金与超高分子量聚乙烯的界面。
实施例3：
按照上述较佳实施例中的连接方法将通过三维打印技术得到的具有粗糙多孔表面的钛合金板与超高分子量聚乙烯板连接，焊接方式为点焊。
其中，钛合金板尺寸为60mm*25mm*4mm(长*宽*厚度)，表面多孔孔径为500μm，超高分子量聚乙烯尺寸为60mm*25mm*4mm(长*宽*厚度)。旋转工具的顶端直径为10mm，转速为755rpm，旋转工具下压至钛合金表面停留时间为30s。钛合金与超高分子量聚乙烯的连接过程中的最高温度高于该条件下超高分子量聚乙烯的热变形温度而低于超高分子量聚乙烯的熔融温度。
本实施例得到的钛合金与超高分子量聚乙烯的连接接头的拉伸剪切强度947N，断裂发生在钛合金与超高分子量聚乙烯的界面。
实施例4：
按照上述较佳实施例中的连接方法将通过三维打印技术得到的具有粗糙多孔表面的钛合金板与超高分子量聚乙烯板连接，焊接方式为点焊。
其中，钛合金板尺寸为60mm*25mm*4mm(长*宽*厚度)，表面多孔孔径为500μm，超高分子量聚乙烯尺寸为60mm*25mm*4mm(长*宽*厚度)。旋转工具的顶端直径为6mm，转速为755rpm，旋转工具下压至钛合金表面停留时间为30s。钛合金与超高分子量聚乙烯的连接过程中的最高温度高于该条件下超高分子量聚乙烯的热变形温度而低于超高分子量聚乙烯的熔融温度。
本实施例得到的钛合金与超高分子量聚乙烯的连接接头的拉伸剪切强度1057N，断裂发生在钛合金与超高分子量聚乙烯的界面。
实施例5：
按照上述较佳实施例中的连接方法将通过三维打印技术得到的具有粗糙多孔表面的钛合金板与超高分子量聚乙烯板连接，焊接方式为点焊。
其中，钛合金板尺寸为60mm*25mm*4mm(长*宽*厚度)，表面多孔孔径为50μm，超高分子量聚乙烯尺寸为60mm*25mm*4mm(长*宽*厚度)。旋转工具的顶端直径为10mm，转速为755rpm，旋转工具下压至钛合金表面停留时间为60s。钛合金与超高分子量聚乙烯的连接过程中的最高温度高于超高分子量聚乙烯的熔融温度。
本实施例得到的钛合金与超高分子量聚乙烯的连接接头在拉伸剪切测试中，断裂发生在钛合金母材一侧，超高分子量聚乙烯与钛合金的界面未断裂。
实施例6：
按照上述较佳实施例中的连接方法将通过三维打印技术得到的具有粗糙多孔表面的钛合金板与超高分子量聚乙烯板连接，焊接方式为点焊。
其中，钛合金板尺寸为60mm*25mm*4mm(长*宽*厚度)，表面多孔孔径为3mm，超高分子量聚乙烯尺寸为60mm*25mm*4mm(长*宽*厚度)。旋转工具的顶端直径为10mm，转速为755rpm，旋转工具下压至钛合金表面停留时间为90s。钛合金与超高分子量聚乙烯的连接过程中的最高温度高于超高分子量聚乙烯的熔融温度。
本实施例得到的钛合金与超高分子量聚乙烯的连接接头在拉伸剪切测试中，断裂发生在钛合金母材一侧，超高分子量聚乙烯与钛合金的界面未断裂。
以上详细描述了本发明的较佳具体实施例。应当理解，本领域的普通技术人员无需创造性劳动就可以根据本发明的构思作出诸多修改和变化。因此，凡本技术领域中技术人员依本发明的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案，皆应在由权利要求书所确定的保护范围内。

Claims (6)

1.一种钛合金与超高分子量聚乙烯的连接方法，其特征在于，所述连接方法包括：
使钛合金与超高分子量聚乙烯接触，通过旋转工具下压钛合金表面，使得所述旋转工具与所述钛合金表面之间产生热量，生成的热量通过所述钛合金传导至所述钛合金与所述超高分子量聚乙烯的界面，在所述旋转工具的压力和所述热量的作用下，所述钛合金与所述超高分子量聚乙烯连接；所述钛合金与所述超高分子聚乙烯的界面处的形状为曲面；所述旋转工具与所述钛合金表面相互作用的顶端呈圆形，所述旋转工具的顶端面具有纹路，所述纹路包括连接所述顶端面的圆心和所述顶端面的圆周的曲线，所述曲线数量大于2，所述曲线在所述顶端面上均匀分布，所述曲线沿所述圆心到所述圆周方向上前点的切向量至后点的切向量的旋转方向与所述旋转工具的旋转方向相同，所述纹路使得所述旋转工具在旋转过程中将被压材料往所述顶端面的中心收集；在所述钛合金与所述超高分子量聚乙烯接触之前，对所述钛合金的一侧进行表面处理，使得所述钛合金的一侧具有粗糙表面，然后使所述钛合金的粗糙表面和所述超高分子量聚乙烯接触，所述粗糙表面是通过三维技术打印得到的，钛合金的三维打印表面的多孔孔径为50μm～3mm。
2.根据权利要求1所述的钛合金与超高分子量聚乙烯的连接方法，其特征在于，所述旋转工具下压时，所述旋转工具的轴线相对于所述钛合金表面的法线的倾斜角被设置为大于或等于0°。
3.根据权利要求1所述的钛合金与超高分子量聚乙烯的连接方法，其特征在于，所述旋转工具与所述钛合金表面之间产生的热量能够通过所述钛合金的传导使得所述钛合金与所述超高分子量聚乙烯的界面处的温度高于或等于所述超高分子量聚乙烯的熔融温度，从而使得所述钛合金与所述超高分子量聚乙烯的界面处的所述超高分子量聚乙烯处于流动状态。
4.根据权利要求3所述的钛合金与超高分子量聚乙烯的连接方法，其特征在于，所述旋转工具与所述钛合金表面之间产生的热量能够通过所述钛合金的传导使得所述钛合金与所述超高分子量聚乙烯的界面处的温度低于所述钛合金的熔点。
5.一种钛合金与超高分子量聚乙烯的连接接头，其特征在于，所述连接接头通过根据权利要求1-4中任意一项所述的钛合金与超高分子量聚乙烯的连接方法获得。
6.一种根据权利要求5所述的钛合金与超高分子量聚乙烯的连接接头在生物医学中的应用。
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