WO2014008742A1 - Method for hole grinding with a small-size drill bit - Google Patents

Abstract

A method for hole grinding with a small-size drill bit. The method comprises the following steps of: (S1) designing a processing drawing; and assisting the shape and dimension design of the hole needing to be processed on computer according to requirements; (S2) editing grinding parameters in CAD (computer-aided design)/CAM (computer-aided manufacturing) to build grinding models for hole drilling and hole expanding; and (S3) performing the processing of hole drilling or hole expanding according to the grinding model for hole drilling or hole expanding. The service life of small-size drill bit is prolonged by adjusting the grinding parameters without changing a cutting tool.

Description

 Method for processing hole using small-sized drill bit

 Field of the Invention This invention relates to the field of abrasive processing, and more particularly to a method of grinding a small size drill bit.

Background technique

 The rapid development of modern technology has made the production of various devices increasingly precise, small in size and high in precision. A variety of operations such as punching, chamfering, and trimming in the processing of thick and brittle materials (such as a ceramic sheet with a thickness of 0.34 inches). Since these materials are hard and brittle, the traditional process is difficult to drill the material, so the electroplated diamond drill bit is the best choice at this time. However, in order to realize the processing of small-sized holes, the diameter of the diamond cutter must be made as small as possible, but the drill bit is easily deformed in the small-size machining. Therefore, the grinding process of a small-sized drill (less than 0.6 mm in diameter) has the following characteristics.

 1. The life of the drill bit is short; the traditional perforation grinding process, all the punching parameters are about the same, causing the diamond cutter to break when it is not fully used, which greatly causes waste of production cost;

2. The programming is unreasonable; the traditional tool path preparation does not consider the actual running track at all, nor does it set the parameters of each stage well according to the path.

 Summary of the invention

 In order to overcome the above disadvantages, an object of the present invention is to provide a grinding method for a small-sized drill which can improve the machining life of a small-sized drill by adjusting the grinding parameters without changing the cutter itself.

The object of the present invention is achieved by the following technical measures, a grinding process of a small-sized drill bit The method includes the following steps:

 (Sl), design and processing drawings; use the computer to assist the design of the required shape and size of the machined holes;

 (S2), edit the grinding parameters in CAD/CAM to establish the grinding model for drilling and reaming; (S3), perform drilling or reaming according to the grinding model of drilling or reaming.

 Specifically, the grinding parameters include a tool path, a tool type, a feed rate, and a parameter of the tool path.

 More specifically, the step (S2) includes:

 (521), select among the tool path options: shape milling;

 (522), select the straight part of the lower knife: series, execute again;

 (523), tool type selection: diameter 0.6mm tool, feed rate parameter is set to 5mm / min;

(524), shape milling parameter selection: spiral descending oblique insertion, oblique insertion processing is defined as: depth, the oblique insertion depth is set to: 0.05 匪, then the feed rate is set to 1 mm / min;

 (525), repeat S21-S24, select the hole contour, modify the shape milling parameter selection: 2D external milling, and set the feedrate parameter to 50 mm/min;

 (526), select two paths: recalculate - entity verification - post-processor output;

 (527), in the post-processor output, change the rate of retraction from 1 匪 /min to 20 mm/mir

The invention adopts more scientific and reasonable processing parameters, so that the diamond drill bit is utilized to the utmost extent, and a better processing effect is produced. The specific reflection is that the dimensional accuracy is high, which satisfies the actual needs of production. The invention makes the processing error smaller than the original, the obtained result is more stable, and the result required by the programming is closer, the product qualification rate is improved, and the feed is brought. A lot of production benefits; the use of diamond drill bit is good, from the perspective of life, in the case of the same tool, the grinding life of the drill bit of the present invention is more than 10 times higher than the conventional process.

detailed description

 The present invention will be further described in detail below with reference to the embodiments.

 A method for drilling glass and ceramics using a 0.6 inch diamond drill bit, comprising the following steps:

 (Sl), design and processing drawings; use the computer to assist the design of the shape and size of the holes to be processed;

 (521), select among the tool path options: shape milling;

 (522), select the straight part of the lower knife: series, execute again;

 (523), drilling; tool type selection: diameter 0.6mm tool, the knife amount is 1匪, the feed rate parameter is set to 5 mm/min;

 (524), shape milling parameter selection: spiral descending oblique insertion, oblique insertion processing is defined as: depth, the oblique insertion depth is set to: 0.05 匪, then the feed rate is set to 1 mm / min;

 (525), reaming; repeat S21-S24, select the hole contour in the same way, modify the shape milling parameter selection: 2D shape milling, the knife amount is 0.03匪, and the feed rate parameter is set to 50mm/min;

 (526), select two paths: recalculate - entity verification - post-processor output;

 (527), in the post-processing program output, the rate of retraction 1 匪 / min is modified to 20 mm / min;

(S3) Perform machining drilling according to the drilling grinding model. Table 1

 The above is a description of the grinding method of the small-sized drill bit of the present invention to help understand the present invention, but the embodiments of the present invention are not limited by the above embodiments, and any changes and modifications not departing from the principle of the present invention are made. The alternatives, combinations, and simplifications are all equivalents and are included in the scope of the present invention.

Claims

WO 2014/008742 , ^ , t t , L» PCT/CN2012/086483

 Claims

 A method for grinding a small-sized drill bit, comprising the steps of: (Sl), designing and processing drawings; using a computer to assist in designing the shape and size of the required processing hole;

 (S2), edit the grinding parameters in CAD/CAM to establish the grinding model for drilling and reaming; (S3), perform drilling or reaming according to the grinding model of drilling or reaming.

 2. The grinding method of a small-sized drill bit according to claim 1, wherein the grinding parameters include a tool path, a tool type, a feed rate, and a parameter of the tool path.

 3. The method of grinding a small-sized drill bit according to claim 1, wherein the step (S2) comprises:

 (521), select among the tool path options: shape milling;

 (522), select the straight part of the lower knife: series, execute again;

 (523), tool type selection: diameter 0.6mm tool, feed rate parameter is set to 5mm / min;

(524), shape milling parameter selection: spiral descending oblique insertion, oblique insertion processing is defined as: depth, the oblique insertion depth is set to: 0.05 匪, then the feed rate is set to 1 mm / min;

 (525), repeat S21-S24, select the hole contour, modify the shape milling parameter selection: 2D external milling, and set the feedrate parameter to 50 mm/min;

 (526), select two paths: recalculate - entity verification - post-processor output;

 (527), in the post-processor output, change the rate of retraction from 1 匪 /min to 20 mm/mir