Design for machining DFMPro.docx
《Design for machining DFMPro.docx》由会员分享,可在线阅读,更多相关《Design for machining DFMPro.docx(7页珍藏版)》请在得力文库 - 分享文档赚钱的网站上搜索。
1、Design for Machining using DFMProDFMPro is an automated tool that supports several common DFM guidelines for machining which helps to produce parts economically with better quality, shorter time and readily available machining tools. DFMPro design rules for the machining process include those f
2、or drilling, prismatic milling and lathe machining or turning. Some of the common design guidelines in-built in the product are, avoid deep holes with small diameters, blind holes should not have a flat bottom, design milling areas so that longer end mills are not required to machine it, featur
3、es should be accessible to the cutting tool in the preferred machining orientation, blind bored holes should be defined with tool relief at the end of the hole and many more. DFMPro provides flexibility to configure the available machining rules. It also provides the ability to add new design r
4、ules requiring very basic programming knowledge. Design Guidelines for Machining The section below contains examples of some design guidelines for machining. These guidelines may help companies to avoid rejections and rework due to engineering errors leading to higher cost of q
5、uality and delay in the delivery to customer.Drilling1. Deep HolesDeep, small diameter holes are difficult to machine. Smaller diameter drills tend to wander and are prone to break, therefore, they are not recommended for convenient mass production. Chip removal becomes difficult while drilling deep
6、 holes. 2. Entry/Exit Surface for HolesDrills should enter and exit surfaces that are perpendicular to the centerline of the hole. When the drill tip contacts the surface, the tip will wander if the surface is not perpendicular to the drill axis. Exit burrs will be uneve
7、n around the circumference of the exit hole. This can make burr removal difficult. 3. Flat Bottomed HolesBlind holes should not have a flat bottom. Flat bottomed holes cause problems with subsequent operations (for example: reaming). A standard tw
8、ist drill creates a hole with a conical bottom. 4. Holes Intersecting CavitiesHoles should not intersect a cavity. If an intersection is unavoidable, at a minimum, the centerline of the hole should be outside the cavity. During machining, the drill follows the path of least re
9、sistance when it intersects a cavity. There is a good chance that the drill will wander when it re-enters the material. 5. Partial HolesWhen a hole intersects with the side of a feature, at least 75% of area of the hole sho
10、uld be within the material. When the hole is being drilled, there is a good chance the drill will wander if a large portion of the hole is outside the material. The problem becomes more severe when the axis of the hole is on or near the edge of the material. 6. Sta
11、ndard Hole SizesTry to use standard hole sizes. Unusual sizes of holes increase the cost of manufacturing through purchasing and inventory costs. Milling7. Deep Narrow HolesTry to avoid pockets and slots that are narrow and deep. Longer tools are more prone to breakage and chip removal becomes
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- DesignformachiningDFMPro
限制150内