美国Johnsongage中径量仪华北总代理
作者：管理员 发布于：2017-10-21 13:25:45 文字：【
大】【
中】【
小】
摘要： Johnson gage是全球知名的螺纹检测方案提供商，其生产的中径量仪享誉全球，在航空、汽车、核工业等领域是独一无二的选择。苏州斯文克精密测量设备有限公司代理美国Johngage螺纹量仪，负责中国区域量仪的销售、售后、维修。
Johnson gage是全球知名的螺纹检测方案提供商，其生产的中径量仪享誉全球，在航空、汽车、核工业等领域是独一无二的选择。苏州斯文克精密测量设备有限公司代理美国Johngage螺纹量仪，负责中国区域量仪的销售、售后、维修。| Technical Information |
 |
|
|
Threaded components are the primary means of assembly for interchangeable connections. Thread requirements are simple: assembly and assembly integrity. The requirements for dimensional screw thread performance are described in specifications and standards such as AS8879, MIL-S-8879, MIL-S-7742, MIL-S-1222, FED-STD-H28 ISO, and the ASME B1 series of documents. In addition to specifying design profiles with tabulated dimensions and tolerances, the standards also introduce terms and definitions essential to understanding the screw thread. Among the key concepts are:
- PITCH DIAMETER , the diameter of the imaginary cylinder passing through the thread in a manner as to equalize the width of thread ridge and groove, defines the Minimum Material Limit of External and Internal threads. As Pitch Diameter is not affected by Lead or Flank Angle variation, it is the primary datum of the screw thread for isolating size, form and profile variation. The design reference for all mathematical calculations for tensile/static/shear strength, elongation, and fatigue, the inspection of Pitch Diameter is critical to torque/preload performance. According to ASME B1.3M and the National Institute of Standards and Technology, GO and NOT GO Thread Ring or Plug Gages do not inspect Pitch Diameter Size.
- FUNCTIONAL SIZE , which defines the Maximum Material Limit External and Internal threads, includes variation in Size, Angle, Lead (including Uniformity of Helix), Taper, and Roundness. This cumulative effect of all profile variation creates an illusion of material where none exists. At best, the inspection of Functional Size only assures assembly, not dimensional integrity of assembly. While GO and NOT GO Thread Ring or Plug Gages are often utilized for the inspection of Functional Diameter, many SPC/SQA programs as well as some acceptance standards and specifications require more comprehensive inspection. Reliance solely on Functional Diameter thread inspection, known as SYSTEM 21 THREAD INSPECTION , is not recommended by FED-STD-H28 Section 20for applications when threads require specific mechanical strength properties. System 21 (Plug and Ring) acceptance methods do not assure dimensional conformance with the material limits specified in ASME B1.1, MIL-S-8879, MIL-S-7742, MIL-S-1222 and FED STD H28. NIST Position, March 1994.
The sequential inspection of both Pitch Diameter Size and Functional Size is known as SYSTEM 22 THREAD INSPECTION in Military, Government , Commercial standards and specifications. In fact, System 22 is the minimum level of thread inspection in documents such as AS8879, MIL-S-8879, MIL-S-7742 and MIL-S-1222. Internally-generated engineering documents of many industrial corporations also invoke System 22 of the dimensional acceptance of threaded products. Both System 21 and System 22 also require the inspection of Major Diameter Size and Minor Diameter Size as applicable.
A quantitative measure of the entire effect of thread form and profile error, the DIFFERENTIAL BETWEEN THE FUNCTIONAL AND PITCH DIAMETER SIZE is the key to both efficient production and ultimate performance. Control of the differential will minimize process error, optimize initial setup and production, and assure maximum flank-to-flank in any threaded connection.
|
| Inspection Systems - External |
|
|
| Click image for larger picture and details . . . |
 External Bench Inspection Systems
Fixed-Dedicated Systems
Through 3.000"(75MM)
|  External Bench Adjustable Inspection System
through 3.000" (75MM)
|  External Portable Inspection
Fixed-Dedicated and Adjustable Systems
Through 3.000" (75MM)
|  External Portable Inspection
Fixed-Dedicated and Adjustable Systems
Above 3.000" (75MM)
|  External Taper Pipe Inspection
Fixed-Dedicated Systems
Through 3.000"(75MM)
|  External Bench Inspection for Feature FIM Runout
Fixed-Dedicated and Adjustable Systems |
|
| Inspection Systems - Internal |
|
<< Back |
| Click image for larger picture and details . . . |
Internal Bench Inspection
Fixed -Dedicated and Adjustable Systems
Through 3.000" (75MM)
|
Internal Portable Inspection
Fixed-Dedicated and Adjustable Systems
Through 3.000" (75MM)
|
Internal Portable Inspection
Fixed-Dedicated and Adjustable Systems
3.000" (75MM)
Through 7.000" (175MM)
|
Internal Portable Inspection
Fixed-Dedicated and Adjustable Systems
Above 4.000" (100MM)
|
Internal Taper Pipe Inspection
Fixed-Dedicated Systems
Through 3.000" (75MM)
| |
|
江苏Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
山东Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
河北Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
河南Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
广西Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
湖北Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
四川Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
广州Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
广东Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
浙江Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
黑龙江Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
吉林Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
辽宁Johnsongage量仪，单一中径、作用中径，螺纹跳动量仪，石油螺纹量仪
