Used to remove material from internal cylindrical surfaces to improve part geometry or produce a finer surface finish, honing is performed at a much slower speed than is typically used in Precision Grinding.
The cutting action is achieved by a rotating hone, or stone, which is bonded with a very fine abrasive grit and mounted on a metal mandrel. Rather than being clamped in place, the workpiece is fixed to allow floating and prevent distortion that would result in an oval rather than round hole.
The hone is rotated in a controlled path over the surface of the part. In some cases, a machinist might move the workpiece back and forth over the rotating hone, ensuring that the part is floating rather than being pressed against the hone - again, to avoid an oval hole.
With a horizontal honing machine, the workpiece may be held in a self-aligning fixture while the machine controls the speed and length of the stroke. The hone is hydraulically or mechanically expanded until the desired hole diameter is achieved.
In addition, a cutting fluid must be used. The purpose is threefold: to clean small chips from the work area, to cool the workpiece and hone, and to lubricate the cutting action.
Lapping is used to achieve surfaces that are very flat and smooth, as well as to finish round work, such as precision plug gages, to very tight tolerances.
The lapping process is more gentle than honing and removes much less surface material. Therefore, the workpiece should be as close as possible to final size - achieved, for example, through double-disk grinding - because lapping typically removes only 0.0005" to 0.005" (0.0127 mm to 0.127 mm) of material.
Unlike honing, lapping uses fine-grained, loose abrasive particles suspended in a viscous or liquid base rather than a bonded abrasive stick or stone. The lapping process involves passing the workpiece between one or two large, very flat lap plates along with the abrasive suspension.
With lapping, close attention is paid to controlling every detail. This includes the speed of the plate(s), the pressure on the workpiece, the size and type of abrasive used, the feeding method, and the plate temperature.
Internal Grinding,Honing Machine Parts,Honing The Inner Hole,Honing Cylinder Liner Dayue Seiko Technology (Dongguan) Co., Limited , https://www.dayuechn.com
Representatives of ten gold medal companies received honors, from left to right in the front row, Gao Wenhua, General Manager of Shanghai Sandian Bellow Automotive Air Conditioning Co., Ltd., Xia Yuejun, Executive Vice President of Wanfeng Auto Group, and Director of Wuxi Weifu Group Co., Ltd. Mr. Xu Xuanyi, Deputy General Manager of Weichai Power Co., Ltd. Chen Dazhao, General Manager of FAW-Foooo Auto Parts Co., Ltd. Tian Yushi, Chief Representative of Wanxiang Qianchao Co., Ltd. in Beijing Fu Aisheng, General Manager of Dongfeng Honda Engine Co., Ltd. Gu Shouxiong and Wang Shunli, Director of Gear Transmission Research Institute of Shaanxi Fast Automotive Gear Co., Ltd.
As the basis for the development of the automotive industry, and driven by it, the auto parts industry has seen high-speed growth and all-out competition in the past few years.
Under the trend of globalization, the industrial organization of auto parts and components has entered a critical period of rapid change. In order to gain competitive advantage and seek long-term survival and development, auto parts enterprises attach great importance to the continuous improvement of the comprehensive competitiveness of enterprises and place them at the height of corporate development strategies.
According to the guidelines for the development of China's machinery industry in the 15th Plan of the State, the 15th Plan for the Automotive Industry and the Automobile Industry Development Policy, the relevant spirit for the development of the auto parts industry is to encourage the adjustment and upgrade of the automobile industry and encourage the automotive industry to zero. Component companies are “bigger and strongerâ€. China National Association of Machinery Industry Enterprise Management and China Automotive Engineering Association jointly launched the final list of "2004 China's Auto Parts Enterprises' Top 100 Most Competitive Enterprises and Top Ten Gold Companies" to encourage enterprises to make full use of them. Grasp the initiative of future competition, and promote the practice of modern enterprise management of auto parts enterprises.
On the afternoon of June 8, 2004, the 2004 China Auto Parts Enterprises' Top 100 Competitiveness Awards and the Ten Gold Medal Awarding Ceremonies were held during the “First China Auto Parts Entrepreneurs Annual Meeting†in Beijing. Honorary Chairman of China Federation of Machinery Industry Bao Xuding, Shao Qihui, President of China Machinery Industry Federation Yu Zhen, Chairman of China Association of Automobile Engineering Zhang Xiaokai, Vice Chairman Fu Yuwu, Honorary Chairman of China National Machinery Industry Enterprise Management Association Sun Zumei, Director Sun Bohuai and other leaders personally presented certificates and gold medals to the top 100 participating companies and representatives of 10 gold medal companies. Xu Jiafu, executive vice chairman of the China Machinery Industry Enterprise Management Association hosted the ceremony.
Honing Process
Lapping Process