CN102990109B - 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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- CN102990109B CN102990109B CN201210489376.4A CN201210489376A CN102990109B CN 102990109 B CN102990109 B CN 102990109B CN 201210489376 A CN201210489376 A CN 201210489376A CN 102990109 B CN102990109 B CN 102990109B
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- light sheet
- thin plate
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- counterbores
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
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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 solving processing 90 ° of counterbores, particularly a kind of light sheet processes the method for 90 ° of counterbores.
background technology
The method of processing 90 ° of counterbores of now widely used national Specification, it is the Pylome drill first selecting the size that to match with screw, then on light sheet, the through hole identical with bit size is processed into, the drill bit of countersunk head bore of the size that matches according to standard application and selected screw again, larger than the maximum nominal size of sunk screw used 1.2 ~ 1.4 times of the bit diameter of the countersunk head bore that standard specifies, 90 ° of counterbores that the drill bit of the countersunk seat size specified by this standard processes on light sheet do not have the circular cone of 90 ° to lead, and define through hole.When installing corresponding sunk screw, 90 ° of screw caps on sunk screw just can not be tangent and fit with 90 ° of counterbores processing on light sheet, destroys the using 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 ensure the validity of installing.Particularly on below 2mm light sheet, the counterbore of processing below M2.5 just can not apply this national standard.
Summary of the invention
The object of the invention is to provide a kind of light sheet to process the method for 90 ° of counterbores, solves the processing of national Specification
90 ° of counterbores do not have circular cone to lead, and affect correct, the effective assembly problem of sunk screw.
The concrete steps of a kind of light sheet being processed the method for 90 ° of counterbores are:
The thickness of first step determination light sheet
According to combination or the demand of shell frame products and performance, select the light sheet adapted to make its cover plate, determine that the aluminium of thin plate selected usually by the material of cover plate, also can select the copper material of thin plate, the thickness t of the light sheet selected is between 1 ~ 2mm.
Second step chooses processing plane on the light sheet selected
According to the selected light sheet reserved, pick out surface smoothness good, the one side of no marking is processing plane, thus prepares for the counterbore of processing 90 °.
3rd step determines the screw thread specification of the sunk screw that will install
In operation, according to the surplus that the screw thread specification d of sunk screw strengthens 0.2mm to 0.6mm again, the nominal diametrical dimension d1 of machined bottom drill bit is selected.
4th step determines the drill bit nominal diametrical dimension of the countersunk head bore of processing 90 ° of counterbores
According to the maximum nominal D of the screw cap of selected screw, then strengthen the surplus of 0.2mm to 0.4mm, select the drill bit nominal diametrical dimension D1 of the countersunk head bore of processing 90 ° of counterbores.And in process, the drill bit of countersunk head bore runs to the oblique shoulder place of 90 °, then adds dark 0.2mm to 0.3mm.
So far complete and process 90 ° of counterbores on light sheet.
Processing 90 ° of counterbores that this method solves national Specification do not have circular cone to lead, and affect correct, the effective assembly problem of sunk screw.Adopt 90 ° of counterbores of this method processing, can ensure that on the sunk screw that assembles and light sheet, 90 ° of counterbores processing are tangent, ensure effectively to install, and ensure 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 method for processing 90 ° of counterbores is applied on the light sheet of below 2mm especially effectively to thickness, sunk screw can be realized and be fixed on light sheet accurately, and meet matching requirements.
Accompanying drawing explanation
The schematic diagram of counterbore described in the method that a kind of light sheet of Fig. 1 processes 90 ° of counterbores.
T. the thickness d of light sheet. the drill bit nominal diametrical dimension of the countersunk head bore of the maximum nominal D1.90 of the nominal diametrical dimension D. screw cap ° counterbore of the screw thread specification d1. bottom outlet drill bit of screw.
detailed description of the invention
The concrete steps that a kind of light sheet processes the method for 90 ° of counterbores are:
The thickness of first step determination light sheet.
Light sheet is selected to be aluminium according to combination or the demand of shell frame products and performance, thickness t=1.5mm.
Second step chooses processing plane on the light sheet selected
According to the selected light sheet reserved, pick out surface smoothness good, the one side of no marking is processing plane, thus prepares for the counterbore of processing 90 °.
3rd step determines the screw thread specification of the sunk screw that will install
In operation, strengthen the surplus of 0.2mm to 0.6mm again according to the screw thread specification d of sunk screw, select machined bottom drill bit nominal diametrical dimension d1.Herein, screw thread specification d=M2, bottom outlet drill bit nominal diametrical dimension d1=φ 2.4.
4th step determines the drill bit nominal diametrical dimension of the countersunk head bore of processing 90 ° of counterbores
According to the maximum nominal D of the screw cap of selected screw, then strengthen the surplus of 0.2mm to 0.4mm, select the drill bit nominal diametrical dimension D1 of the countersunk head bore of processing 90 ° of counterbores.And in process, the drill bit of countersunk head bore runs to the oblique shoulder place of 90 °, then adds dark 0.2mm to 0.3mm.Herein, the maximum nominal D=φ 3.8 of screw cap, drill bit nominal diametrical dimension D1=φ 4.2.
So far complete and process 90 ° of counterbores at light sheet.
Claims (1)
1. light sheet processes a method for 90 ° of counterbores, for processing M2.5 with lower counterbore on below 2mm light sheet, it is characterized in that concrete steps are:
The thickness of first step determination light sheet
According to combination or the demand of shell frame products and performance, select the light sheet adapted to make its cover plate, determine that the aluminium of thin plate selected usually by the material of cover plate, also can select the copper material of thin plate, the thickness t of the light sheet selected is between 1 ~ 2mm;
Second step chooses processing plane on the light sheet selected;
According to the selected light sheet reserved, pick out surface smoothness good, the one side of no marking is processing plane, thus prepares for the counterbore of processing 90 °;
3rd step determines the screw thread specification of the sunk screw that will install;
In operation, according to the surplus that the screw thread specification d of sunk screw strengthens 0.2mm to 0.6mm again, the nominal diametrical dimension d1 of machined bottom drill bit is selected;
4th step determines the drill bit nominal diametrical dimension of the countersunk head bore of processing 90 ° of counterbores;
According to the maximum nominal D of the screw cap of selected screw, then strengthen the surplus of 0.2mm to 0.4mm, select the drill bit nominal diametrical dimension D1 of the countersunk head bore of processing 90 ° of counterbores; And in process, the drill bit of countersunk head bore runs to the oblique shoulder place of 90 °, then adds dark 0.2mm to 0.3mm;
So far complete and process 90 ° of counterbores on light sheet.
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 |
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| Publication Number | Publication Date |
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| CN102990109A CN102990109A (en) | 2013-03-27 |
| CN102990109B true CN102990109B (en) | 2014-12-31 |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200955530Y (en) * | 2006-09-19 | 2007-10-03 | 艾默生网络能源有限公司 | Connection mechanism for connecting thinplate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10217011A (en) * | 1997-01-30 | 1998-08-18 | Press Kogyo Co Ltd | Drilling method for thin plate material by taper drill |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (4)
| Title |
|---|
| JP特开平10-217011A 1998.08.18 * |
| 中国标准出版社全国紧固件标准化技术委员会.紧固件 沉头用沉孔.《中国机械工业标准汇编:紧固件基础卷 第3版》.2004,40. * |
| 第一汽车制造厂设备修造分厂编写组.紧固件.《机械工程材料手册 下册(修订第3版)》.1982,547. * |
| 紧固件通孔及沉孔尺寸的简易设计;刘荣基;《烟台大学学报》;20011031;第14卷(第4期);全文 * |
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