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Method for manufacturing electric plating diamond burr

A technology for electroplating diamond and manufacturing method, which is applied to electrolytic coatings, dental tools, coatings, etc., can solve the problems of easy falling off of diamond particles, peeling off of the coating layer, and fracture of the needle base body, so as to reduce the probability of breakage and enhance the coating layer. Bonding force, the effect of preventing breakage accidents

Inactive Publication Date: 2009-05-06
HARBIN ENG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide an electroplated diamond bur that can solve the problems that the diamond particles are easy to fall off during use, the coating flakes off, and the bur matrix breaks under impact load, and improve the service life of the electroplated diamond bur. needle manufacturing method

Method used

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preparation example Construction

[0038] The preparation process of the composite coating layer in the third step of the present invention is as follows: preparation of plating solution→priming plating→sand plating→thickening plating. The prepared electroplating solution is composed of NiSO 4 ·6H 2 O 250~350g·L -1 , NiCl 2 ·6H 2 O 35~50g·L -1 , H 3 BO 3 30-45g·L -1 , sodium lauryl sulfate 0.05~0.1g·L -1 .

[0039] The bottom plating in step 3 of the present invention includes impact plating and empty plating. The electroplating process parameters of impact nickel plating are: 2-4A / dm 2 , time 5-15min; electroplating process parameters for empty nickel plating: 0.5-3A / dm 2 , time 10-30min.

[0040] In the preparation of the diamond composite coating in step 3 of the present invention, an annular hollow electrolytic nickel column or four symmetrically distributed electrolytic nickel plates are used as anodes.

[0041] The upper sand plating in step 3 of the present invention is to add the upper san...

specific Embodiment approach 1

[0044] Specific implementation mode 1: Research on the heat treatment process after electroplating nickel on the surface of nickel-titanium alloy

[0045] The nickel-titanium alloy bur matrix is ​​used as the research object, and the composition is Ti-50.8 at.% Ni. Before electroplating, the Nitinol sheet is pretreated.

[0046] (1) Pretreatment process

[0047] a. Insulate the non-plated part of the nickel-titanium alloy bur base with a thermoplastic tube.

[0048] b. Put the nickel-titanium alloy bur base into acetone solution, ultrasonically clean it for 15 minutes, and then rinse it with distilled water.

[0049] c. Containing NaOH 50g / l, Na 2 CO 3 40g / l, Na 3 PO 4 30g / l and Na 2 SiO 3 Carry out alkaline washing and degreasing in 5g / l lye, keep it warm for 20min at a temperature of 80°C, then wash under ultrasonic conditions for 10min, and rinse with distilled water.

[0050] d. In HF and HNO 3 The mixed solution (volume ratio HF (40wt.%): HNO 3 (65wt.%)=1:3)...

specific Embodiment approach 2

[0059] Specific implementation mode two: vacuum-encapsulate the electroplated nickel-titanium alloy bur base and then conduct heat treatment at a treatment temperature of 850° C., keep it warm for 60 minutes, and then cool in the furnace. Others are the same as the first embodiment.

[0060] The cross-section of the nickel-titanium alloy bur substrate after heat treatment was ground and polished with No. 1000 sandpaper, and the X-ray energy spectrum analyzer was used to detect the line of Ti and Ni elements on the interface between the nickel-plated layer on the cross-section and the nickel-titanium alloy substrate. Scan component analysis. The results show that when the nickel-titanium alloy substrate is used, a diffusion layer can be formed between the nickel plating layer and the substrate during heat treatment, and the interface bonding strength is greatly improved.

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Abstract

The invention provides a method for manufacturing a plated diamond needle, which takes nickel-titanium alloy as a substrate of the needle, and comprises the following steps: firstly, the nickel-titanium alloy substrate of the needle is processed; secondly, the nickel-titanium alloy substrate of the needle and diamond particles are subjected to electroplating pre-treatment; thirdly, a composite diamond clad layer is coated on the head of the needle by means of direct-current electroplating; and fourthly, the diamond needle prepared is subjected to vacuum heat-treatment after electroplating. The method has the advantages that: firstly, the nickel-titanium alloy substrate of the needle has strong impact resistance, and the fracture probability of the substrate of the needle under the actuation of impulsive load is reduced, so that the fracture accident of the substrate of the needle can be effectively prevented; and secondly, due to adoption of the nickel-titanium alloy substrate of the needle and the heat-treatment technology after electroplating, a diffused layer is formed on an interface between the nickel-titanium alloy substrate of the needle and a metallic nickel clad layer, and metallic nickel in the clad layer and titanium in the nickel-titanium alloy substrate of the needle form intermetallic compounds, so that the bonding force of the clad layer is greatly reinforced, and the service life of the diamond needle is further improved.

Description

(1) Technical field [0001] The invention relates to a manufacturing method of a medical dental instrument, in particular to a manufacturing method of an electroplated diamond bur for grinding teeth. (2) Background technology [0002] Diamond burs are important instruments for tooth preparation in dental restorations, usually consisting of a metal base and a diamond-embedded grinding layer. The preparation methods of diamond bur mainly include electroplating method and powder metallurgy method. Among them, there is a strong chemical bonding force between the diamond and the metal coating in the sintered diamond bur prepared by powder metallurgy, so it has good cutting performance and high durability. However, due to the high temperature of the preparation process, certain thermal damage will be generated on the diamond, which will reduce the strength of the diamond. However, the production process of the diamond bur prepared by the electroplating method is carried out under...

Claims

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Application Information

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IPC IPC(8): C25D15/00B23P5/00A61C3/00
Inventor 郑玉峰周惠敏郑卫李莉
Owner HARBIN ENG UNIV
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