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Composite bond cbn grinding wheel for stainless steel medullary cavity reamer and its application

Active Publication Date: 2020-04-24
江苏赛扬精工科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stainless steel materials are prone to common problems such as accelerated grinding wheel wear, poor machined surface integrity, and difficulty in chip removal during the processing process, which seriously affects the processing quality, production cycle and processing cost of parts made of such materials
Reasons for the difficulty in processing ordinary stainless steel: 1. High temperature strength, large work hardening tendency; 2. Large cutting force; 3. Severe bonding between chips and grinding wheel; 4. Chips are not easy to curl and break; 5. Large linear expansion coefficient; 6. , small thermal conductivity
Although the processing of ordinary stainless steel is already very difficult, with the development of stainless steel, the processing of precipitation hardening (600 series) stainless steel has become more difficult
Therefore, there will be many problems such as: work hardening caused by insufficient grinding wheel, easy curling of chips, shortened tool life caused by increased cutting temperature, and melting.

Method used

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  • Composite bond cbn grinding wheel for stainless steel medullary cavity reamer and its application
  • Composite bond cbn grinding wheel for stainless steel medullary cavity reamer and its application
  • Composite bond cbn grinding wheel for stainless steel medullary cavity reamer and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment one prepares composite bond CBN emery wheel, comprises the following steps:

[0044] 1. Preparation of alloy powder:

[0045] The metal powder raw materials in the following weight percentages: 55% copper powder, 40% tin powder, and 5% silver powder are mixed and ball milled, and passed through a 320-mesh standard sieve to obtain alloy powder.

[0046] 2. Preparation of matrix mixture:

[0047] The powder raw material of following volume percentage: Modified polyimide resin powder (brand PI-KF-1, commercially available) 35%, copper powder 52%, tin powder 10%, silver powder 3% are placed in three-dimensional mixing machine and mix After 1 h, pass through a 320-mesh standard sieve to obtain a matrix mixture.

[0048] 3. Preparation of composite bond CBN grinding wheel:

[0049] (1) Mix 80% alloy powder and 20% modified polyimide resin powder (brand PI-KF-1, commercially available) in a three-dimensional mixer for 1 hour, then pass through 320 mesh Standard ...

Embodiment 2

[0058] Embodiment 2 Preparation of composite bond CBN grinding wheel, the process is the same as that of Embodiment 1, and the specific steps are:

[0059] 1. Preparation of alloy powder:

[0060] The metal powder raw materials in the following weight percentages: 50% copper powder, 40% tin powder, and 10% silver powder are mixed and ball milled, and passed through a 320-mesh standard sieve to obtain alloy powder.

[0061] 2. Preparation of matrix mixture:

[0062] Put the following powder raw materials in volume percentage: 31% modified polyimide resin powder, 56% copper powder, 11% tin powder, 2% silver powder in a three-dimensional mixer for 1 hour and then pass through a 320-mesh standard sieve to prepare Obtain the matrix mixture.

[0063] 3. Preparation of composite bond CBN grinding wheel:

[0064] (1) Put the alloy powder and resin powder with a volume percentage of 75% and 25% in a three-dimensional mixer for 1 hour, and then pass through a 320-mesh standard sieve ...

Embodiment 3

[0073] Embodiment 3 Preparation of composite bond CBN grinding wheel, the process is the same as that of Embodiment 1, and the specific steps are:

[0074] 1. Preparation of alloy powder:

[0075] The metal powder raw materials with the following weight percentages: 52% of copper powder, 41% of tin powder, and 7% of silver powder are mixed and ball milled, and passed through a 320-mesh standard sieve to obtain alloy powder.

[0076] 2. Preparation of matrix mixture:

[0077] Put the following powder raw materials in volume percentage: 38% of modified polyimide resin powder, 50% of copper powder, 10% of tin powder, and 2% of silver powder in a three-dimensional mixer for 1 hour and then pass through a 320-mesh standard sieve to prepare Obtain the matrix mixture.

[0078] 3. Preparation of composite bond CBN grinding wheel:

[0079] (1) Put the alloy powder and resin powder with a volume percentage of 70% and 30% in a three-dimensional mixer for 1 hour, and then pass through ...

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Abstract

The invention belongs to the field of CBN grinding wheels, and in particular relates to a composite binder CBN grinding wheel for medical instrument stainless steel medullary cavity reamers and its application, wherein the volume ratio of CBN abrasives, composite binders, and alumina whiskers is 20-25%, 60 ~70%, 10~15%; the composite binder is composed of alloy powder and resin powder, of which the alloy powder is made by mechanical alloying, and the weight percentage of each component is: copper Cu 50~60%, tin Sn 40~50% , silver Ag 5 ~ 10%; resin powder is modified polyimide resin. When the CBN grinding wheel prepared with the above-mentioned composite bond is used to process stainless steel medullary cavity reamers on a five-axis CNC machine tool, it not only has the characteristics of good sharpness and self-sharpening of the resin bond, but also has high strength and wear resistance of the metal bond. Good, good shape retention characteristics. When processing stainless steel medullary cavity reamers, the overall processing efficiency is increased by 200-300%.

Description

technical field [0001] The invention relates to stainless steel processing, in particular to a composite binder CBN grinding wheel for stainless steel medullary cavity reamers of medical instruments, belonging to the field of CBN grinding wheels. Background technique [0002] Medical devices refer to instruments, equipment, utensils, in vitro diagnostic reagents and calibrators, materials, and other similar or related items that are directly or indirectly used on the human body. Surgical instruments refer to the general term for all kinds of medical instruments that need to be used during surgery. The types of surgical instruments are very complicated. There are 6,000 varieties and specifications of surgical instruments in my country. After more than 50 years of development, the output of surgical instruments in my country has also increased from 1949 to The 470,000 pieces in China have grown to hundreds of millions now. Moreover, the product quality of surgical instruments ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/28B24D18/00
Inventor 龚文王凯平涂俊群
Owner 江苏赛扬精工科技有限责任公司
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