CN102990109A - Method for processing 90-degree counter bore in thin plate - Google Patents
Method for processing 90-degree counter bore in thin plate Download PDFInfo
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- CN102990109A CN102990109A CN2012104893764A CN201210489376A CN102990109A CN 102990109 A CN102990109 A CN 102990109A CN 2012104893764 A CN2012104893764 A CN 2012104893764A CN 201210489376 A CN201210489376 A CN 201210489376A CN 102990109 A CN102990109 A CN 102990109A
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- processing
- light sheet
- thin plate
- screw
- counterbores
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a method for processing a 90-degree counter bore in a thin plate. The invention solves the problem that the installation of sunk screws is affected because of the formation of straight up and down through holes because of no taper guide direction of 90 degrees formed on the processed thin plate as the normal diameter of the corresponding processing drill ruled as the standard is large and the thickness of the processed plate is thin when the 90-degree counter bore is processed through a national standard method in the method for processing the 90-degree counter bore in the thin plate. After the 90-degree counter bore is processed through the method provided by the invention, a 90-degree bolt head of the installed counter screw is tangent and coincident to the 90-degree counter bore processed in the thin plate, so that the assembly demand is satisfied. Through the method, the sunk screw installed on the thin plate satisfies the installation demand, so that the installation is effective, and a nut of the sunk screw is aligned to the processing surface of the thin plate and does not protrude out of the processing surface of the thin plate. The method is an effective technical technique for processing the 90-degree counter bore in the thin plate.
Description
Technical field
The present invention relates to a kind of method that solves 90 ° of counterbores of processing, particularly the method for 90 ° of counterbores of a kind of light sheet processing.
Background technology
The method of 90 ° of counterbores of processing of now widely used national Specification, to select first and the match Pylome drill of size of screw, then be processed into the through hole identical with bit size at light sheet, again according to the match drill bit in countersunk seat hole of size of standard application and selected screw, large 1.2～1.4 times than the maximum nominal size of used sunk screw of the bit diameters in the countersunk seat hole of standard code, 90 ° of counterbores that process at light sheet with the drill bit of the countersunk seat size of this standard code do not have 90 ° circular cone guiding, have formed through hole.When corresponding sunk screw was installed, 90 ° of screw caps on the sunk screw just can not the tangent and applying with 90 ° of counterbores processing on the light sheet, had destroyed the use function of product.The screw cap end face of sunk screw just can not with the machined surface of thin plate at grade, do not meet matching requirements, just can not guarantee the validity of installing.Particularly on the following light sheet of 2mm, the following counterbore of processing M2.5 just can not be used this national standard.
Summary of the invention
The object of the invention is to provide the method for 90 ° of counterbores of a kind of light sheet processing, the processing that solves national Specification
90 ° of counterbores do not have the circular cone guiding, affect correct, the effective assembly problem of sunk screw.
The concrete steps of the method for 90 ° of counterbores of processing are on a kind of light sheet:
The first step is determined the thickness of light sheet
According to combination or demand and the performance of shell frame products, select the light sheet that adapts to make its cover plate, the material of determining cover plate is selected the aluminium of thin plate usually, also can select the copper material of thin plate, and the thickness t of the light sheet of selecting is between 1～2mm.
Second step is chosen processing plane at selected good light sheet
According to the selected light sheet of reserving, pick out surface smoothness good, the one side of no marking is processing plane, thereby prepares for 90 ° counterbore of processing.
The screw thread specification of the definite sunk screw that will install of the 3rd step
In operating process, strengthen again 0.2mm to the surplus of 0.6mm according to the screw thread specification d of sunk screw, select the nominal diameter size d1 of machined bottom drill bit.
The 4th step was determined the drill bit nominal diameter size in the countersunk seat hole of 90 ° of counterbores of processing
According to the maximum nominal D of the screw cap of selected screw, strengthen again 0.2mm to the surplus of 0.4mm, select the drill bit nominal diameter dimension D 1 in the countersunk seat hole of 90 ° of counterbores of processing.And in process, the drill bit in countersunk seat hole runs to 90 ° oblique shoulder place, adds dark 0.2mm again and gets final product to 0.3mm.
So far finish at 90 ° of counterbores of light sheet processing.
90 ° of counterbores of processing that this method solves national Specification do not have the circular cone guiding, affect correct, the effective assembly problem of sunk screw.Adopt 90 ° of counterbores of this method processing, can guarantee to assemble 90 ° of counterbores processing on the sunk screw of usefulness and the light sheet tangent, guarantee effectively to install, and guaranteed that the screw cap of sunk screw is concordant with the machined surface of light sheet, do not protrude from the machined surface of light sheet.
Adopt this method, can solve on light sheet, particularly the light sheet of thickness below 2mm used the method for processing 90 ° of counterbores effective especially, can realize that sunk screw is fixed on the light sheet accurately, and meet matching requirements.
Description of drawings
The schematic diagram of the described counterbore of method of 90 ° of counterbores of a kind of light sheet processing of Fig. 1.
T. the thickness d of light sheet. the nominal diameter dimension D of the screw thread specification d1. bottom outlet drill bit of screw. the drill bit nominal diameter size in the countersunk seat hole of D1.90 ° of counterbore of the maximum nominal of screw cap.
The specific embodiment
The concrete steps of the method for 90 ° of counterbores of a kind of light sheet processing are:
The first step is determined the thickness of light sheet.
Selecting light sheet according to combination or the demand of shell frame products and performance is aluminium, thickness t=1.5mm.
Second step is chosen processing plane at selected good light sheet
According to the selected light sheet of reserving, pick out surface smoothness good, the one side of no marking is processing plane, thereby prepares for 90 ° counterbore of processing.
The screw thread specification of the definite sunk screw that will install of the 3rd step
In operating process, strengthen again 0.2mm to the surplus of 0.6mm according to the screw thread specification d of sunk screw, select machined bottom drill bit nominal diameter size d1.Herein, screw thread specification d=M2, bottom outlet drill bit nominal diameter size d1=φ 2.4.
The 4th step was determined the drill bit nominal diameter size in the countersunk seat hole of 90 ° of counterbores of processing
According to the maximum nominal D of the screw cap of selected screw, strengthen again 0.2mm to the surplus of 0.4mm, select the drill bit nominal diameter dimension D 1 in the countersunk seat hole of 90 ° of counterbores of processing.And in process, the drill bit in countersunk seat hole runs to 90 ° oblique shoulder place, adds dark 0.2mm again and gets final product to 0.3mm.Herein, the maximum nominal D=of screw cap φ 3.8, drill bit nominal diameter dimension D 1=φ 4.2.
So far finish at 90 ° of counterbores of light sheet processing.
Claims (1)
1. the method for 90 ° of counterbores of light sheet processing is characterized in that concrete steps are:
The first step is determined the thickness of light sheet
According to combination or demand and the performance of shell frame products, select the light sheet that adapts to make its cover plate, the material of determining cover plate is selected the aluminium of thin plate usually, also can select the copper material of thin plate, and the thickness t of the light sheet of selecting is between 1～2mm;
Second step is chosen processing plane at selected good light sheet
According to the selected light sheet of reserving, pick out surface smoothness good, the one side of no marking is processing plane, thereby prepares for 90 ° counterbore of processing;
The screw thread specification of the definite sunk screw that will install of the 3rd step
In operating process, strengthen again 0.2mm to the surplus of 0.6mm according to the screw thread specification d of sunk screw, select the nominal diameter size d1 of machined bottom drill bit;
The 4th step was determined the drill bit nominal diameter size in the countersunk seat hole of 90 ° of counterbores of processing
According to the maximum nominal D of the screw cap of selected screw, strengthen again 0.2mm to the surplus of 0.4mm, select the drill bit nominal diameter dimension D 1 in the countersunk seat hole of 90 ° of counterbores of processing; And in process, the drill bit in countersunk seat hole runs to 90 ° oblique shoulder place, adds dark 0.2mm again and gets final product to 0.3mm;
So far finish at 90 ° of counterbores of light sheet processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210489376.4A CN102990109B (en) | 2012-11-27 | 2012-11-27 | Method for processing 90-degree counter bore in thin plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210489376.4A CN102990109B (en) | 2012-11-27 | 2012-11-27 | Method for processing 90-degree counter bore in thin plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102990109A true CN102990109A (en) | 2013-03-27 |
| CN102990109B CN102990109B (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210489376.4A Active CN102990109B (en) | 2012-11-27 | 2012-11-27 | Method for processing 90-degree counter bore in thin plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624136A (en) * | 2013-11-14 | 2014-03-12 | 梧州恒声电子科技有限公司 | Salad hole punching machining method and machining die thereof |
| CN104668606A (en) * | 2015-01-19 | 2015-06-03 | 竞陆电子(昆山)有限公司 | PCB substrate T type hole forming method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10217011A (en) * | 1997-01-30 | 1998-08-18 | Press Kogyo Co Ltd | Drilling method for thin plate material by taper drill |
| CN200955530Y (en) * | 2006-09-19 | 2007-10-03 | 艾默生网络能源有限公司 | Connection mechanism for connecting thinplate |
-
2012
- 2012-11-27 CN CN201210489376.4A patent/CN102990109B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10217011A (en) * | 1997-01-30 | 1998-08-18 | Press Kogyo Co Ltd | Drilling method for thin plate material by taper drill |
| CN200955530Y (en) * | 2006-09-19 | 2007-10-03 | 艾默生网络能源有限公司 | Connection mechanism for connecting thinplate |
Non-Patent Citations (3)
| Title |
|---|
| 中国标准出版社全国紧固件标准化技术委员会: "《中国机械工业标准汇编：紧固件基础卷 第3版》", 31 May 2004 * |
| 刘荣基: "紧固件通孔及沉孔尺寸的简易设计", 《烟台大学学报》 * |
| 第一汽车制造厂设备修造分厂编写组: "《机械工程材料手册 下册（修订第3版）》", 31 October 1982 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624136A (en) * | 2013-11-14 | 2014-03-12 | 梧州恒声电子科技有限公司 | Salad hole punching machining method and machining die thereof |
| CN104668606A (en) * | 2015-01-19 | 2015-06-03 | 竞陆电子(昆山)有限公司 | PCB substrate T type hole forming method |
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| Publication number | Publication date |
|---|---|
| CN102990109B (en) | 2014-12-31 |
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