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Anonymous users2024-02-09Refers to the external threadRetract grooveThe parameters of the threaded retract groove according to the DIN76 standard, the DIN76-1 threaded retract part 1: the ISO metric thread according to DIN13-1, the DIN76-2 according to DINISO228 part 1Pipe threadsThe thread tail and the thread undercut.
DIN is the standard of the German Institute for Standardization, and the precision size can be found out from the German standard before the processing size is determined. It is enough to refer to similar Chinese national standards, and after decades of reform and opening up, many standards have been close to or equivalent to international standards.
It is used to mark minor changes in the process of drawing use, and (partitions are used for sheets with partitions) correspond to the location of changes on the drawings. As for the number of pieces, it is generally indicated in the parts list of the assembly drawing.
Introduce. Retract groove, when threading, the workpiece rotates and the axial direction of the turning tool.
The feed is mechanically linked, when the car reaches the tail, the turning tool exits radially, the workpiece is still rotating, and the turning tool is still feeding axially, so there is a useless threaded tail. In many cases, you don't want to have this tail, so just before threading, you turn out a groove that is smaller than the thread diameter and long enough to pull the tool out. This groove is called the retract groove.
The above content refers to: Encyclopedia - Retract Groove.
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Anonymous users2024-02-08It is worth testing methods for automobile leather atomization by automobile manufacturers:
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Anonymous users2024-02-07I don't have a Chinese version, only a German version of DIN 76, which has a 76-b specification, I hope it can help LZ
Threaded retract groove.
DIN 76-1 Threaded retract groove Part 1: ISO metric threads according to DIN 13-1.
DIN 76-2 Thread tail and thread undercut according to DIN ISO 228 Part 1 for pipe threads.
DIN 76-3 trapezoidal thread. Thread tails and thread retracts for serrated and round threads and other coarse threads.
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Anonymous users2024-02-06Refers to the parameters of the external thread retract groove, the thread retract groove in accordance with the DIN 76 standard, you can go to the following ** to check the specific data.
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Anonymous users2024-02-05What are the criteria for DIN 76-B? High scores.
Dear dear, according to the information you provided, DIN 76-B refers to the standard for run-out grooves developed by DIN (German Institute for Standardization), which partially specifies the parameters of thread retracts. Specifically, DIN 76-1 is a standard for threaded retracts of ISO metric threads in accordance with DIN 13-1. According to DIN 13-1 and DIN 76-1, the threaded retract must follow a specific dimension and geometry to ensure a good and correct retract of the threaded assembly.
In addition to this, DIN 76-2 is about the thread tail and undercut of pipe threads according to DIN ISO 228 Part 1. This standard specifies the design and size of the retract groove of the pipe thread to ensure a suitable threaded connection. It is important to note that these standards are specific to thread types and applications, and if you need to access a specific standard document for more detailed information on parameters and specifications, it is advisable to consult the relevant DIN standard document or consult a professional mechanical designer or subject matter expert.
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Anonymous users2024-02-04The corresponding national standard of DIN6921 is GB T5787-86.
National standards refer to standards approved and issued by the national standardization authority, which are of great significance to the national economic and technological development, and are unified across the country. The national standard is a unified technical requirement nationwide, which is prepared by the national standardization administrative department, coordinates the division of labor, organizes the formulation (including revision), and unifies the approval, numbering and release. Where the law has other provisions on the formulation of national standards, it is to be implemented in accordance with the provisions of the law.
The term of the national standard is generally 5 years, after which the national standard will be revised or reformulated. In addition, with the development of society, the state needs to formulate new standards to meet the needs of people's production and life. Therefore, the standard is a kind of dynamic information.
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Anonymous users2024-02-03Don't pretend to understand if you don't understand, the corresponding national standard should be GB5789-86
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Anonymous users2024-02-02I roughly checked the size, and it's the same as the 5789.
din6921-1983
gb5789-1986
din6921-1983
gb/t5789-1986
gb/t5789-1986
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