Controlling method of hole drilling hole site precision

A technology of control method and hole position accuracy, which is applied in metal processing and other directions, and can solve problems such as inability to meet processing requirements

Inactive Publication Date: 2019-06-07
GUANGDONG CHAMPION ASIA ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for more precise hole position accuracy cap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A control method for drilling hole position accuracy, the processing steps comprising:

[0014] S1. Prepare special drills, design and confirm the tools required for production, and its parameters are: the diameter of the drill is the diameter of the tool required for the PCB circuit board, the type of the drill is UC type, the diameter of the handle is 2.154mm, and the length of the blade is 1.1 mm, the concentricity between the blade and the shank is 2.5um, and the diameter error of the shank is 1.2um; S2. Use a special drill to pre-drill a certain depth on the circuit board. When the special drill is pre-drilled on the circuit board, Pre-drill one piece / stack of PCB boards with the processing parameter speed of 42krpm and the cutting speed of 0.38m / min. The pre-drilling depth is 6% of the thickness of the PCB board;

[0015] S3. Use the same diameter common drill bit to drill again, the processing parameter speed is 82krpm, the cutting speed is 1.0m / min, and the dril...

Embodiment 2

[0019] A control method for drilling hole position accuracy, the processing steps comprising:

[0020] S1. Prepare special drills, design and confirm the tools required for production, and its parameters are: the diameter of the drill is the diameter of the tool required for the PCB circuit board, the type of the drill is UC type, the diameter of the handle is 1.685mm, and the length of the blade is 0.9 mm, the concentricity between the blade and the shank is 2um, and the diameter error of the shank is 1.0um; S2. Use a special drill to pre-drill a certain depth on the circuit board. One piece of PCB board / stack, pre-drilling with the processing parameter speed of 38krpm, cutting speed of 0.32m / min, the pre-drilling depth is 5.5% of the thickness of the PCB board;

[0021] S3. Then use the same diameter common drill bit to drill, the processing parameter speed is 85krpm, the cutting speed is 1.1m / min, and the drilling depth is 9mm;

[0022] S4. Then use the same diameter commo...

Embodiment 3

[0024] A control method for drilling hole position accuracy, the processing steps comprising:

[0025] S1. Prepare special drills, design and confirm the tools required for production, and its parameters are: the diameter of the drill is the diameter of the tool required for the PCB circuit board, the type of the drill is UC type, the diameter of the handle is 1.25mm, and the length of the blade is 0.7 mm, the concentricity between the blade and the shank is 1um, and the diameter error of the shank is 0.5um; S2. Use a special drill to pre-drill a certain depth on the circuit board. One piece / stack of PCB boards, pre-drilling with processing parameter speed of 30krpm, cutting speed of 0.2m / min, and pre-drilling depth of 5% of PCB board thickness;

[0026] S3. Then use the same diameter common drill bit to drill, the processing parameter speed is 65krpm, the cutting speed is 0.8m / min, and the drilling depth is 7mm;

[0027] S4. Then use the same diameter common drill bit to dri...

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Abstract

The invention provides a controlling method of hole drilling hole site precision. The method is characterized by comprising the steps that S1, a special drilling pin is prepared, cutters which are determined to be needed by production are designed, the parameters are that the diameter of the drilling pin is the diameter of the cutter needed by a PCB, the type of the drilling cutter is UC type, thediameter of the knife handle is 1.25-2.5 mm, the length of the blade is 0.7-1.2 mm, the concentricity of the blade and the knife handle is 1-3 microns, and the diameter error of the cutter handle is0.5-1.5 microns; verification and confirmation are conducted by using a hole site inspecting machine after hole drilling is completed. The method has the advantages that a hole drilling tool and a processing technology are optimized to allow the hole site precision common difference of hole drilling processing to be +/- 1mil, and the processing demands of more precise hole site precision capability can be met.

Description

technical field [0001] The invention relates to the field of circuit board processing technology, in particular to a control method for drilling hole position accuracy. Background technique [0002] With the rapid development of the national economy and digital information technology, people began to put forward higher and higher requirements for printed circuit board terminal products, while the layout density of printed circuit boards is gradually increasing, so it is necessary to reduce the drilling aperture, for Increasing the layout density of printed circuit boards is undoubtedly a development trend of modern technology. [0003] In the prior art, the drilling is processed by a drilling machine, and the stacked boards during processing are required to be 1 block / stack. The hole position accuracy tolerance of general drilling is + / -2mil. However, for more precise hole position accuracy capabilities, it cannot meet the processing requirements. Contents of the inv...

Claims

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Application Information

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IPC IPC(8): B26F1/24
Inventor 刘继承刘水波柳正华
Owner GUANGDONG CHAMPION ASIA ELECTRONICS CO LTD
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