How to inspect the threaded ring gauge, how to see the threaded ring gauge report

A set of threaded ring gauges has two parts: the middle diameter of the general gauge and the stop gauge, the middle diameter size of the general gauge is larger, and the middle diameter size of the stop gauge is smaller. The above dimensions are determined according to the tolerance zone of the corresponding accuracy class of the thread.

Since there are two parts, of course, there should be two sets of test values on the test report.

When the external thread is detected with a thread ring gauge, as long as the general gauge can be screwed into the inspected thread, and the stop gauge cannot be screwed in, the tested external thread can be judged to be qualified.

Ring gauge, also known as correction gauge, is a ring with a specific size and properties used to correct the deficiencies of the gage. According to the appearance, the ring gauge can be divided into: smooth ring gauge, also called halo gauge, threaded ring gauge, parallel thread ring gauge, etc.; According to the different uses and manufacturing standards, it can be divided into:

Standard ring gauge, SK standard ring gauge, German standard ring gauge, pipe ring gauge, etc.; According to the different manufacturing materials, there can also be a difference between ceramic ring gauge and metal ring gauge.

It is to use the thread to calibrate the plug gauge detection, there are TT, TZ, ZT, ZZ, TS, ZS several, according to the need to choose if you want to measure the actual size, it is estimated that you can only send the testing unit to measure, unless your amount is huge!

1), m value <14 is measured with a thread calibration gauge 2), m value 14 is measured with 60 or 55 calibration block + measuring block. 3) Some use the smooth ring gauge as the standard (this error will be a little larger than the error of the second method).

You can use them for self-schooling! That is to say, use the T gauge to compare the Z gauge, or use the Z gauge to calibrate the T gauge.

Legal Analysis: The end ring gauge has a groove on the outer cylindrical surface. When the size is more than 100 mm, the threaded ring gauge is a double-shank threaded ring gauge type.

There are three types of specifications: coarse teeth, fine teeth, and pipe threads. Thread ring gauges with a pitch of millimeters or less and higher than grade 2 and thread ring gauges with a pitch of millimeters or less and thread rings with a pitch of millimeters or less for grade 3 do not have end ends.

Legal basis: Product Quality Law of the People's Republic of China

Article 3 Producers and sellers shall establish and improve the internal product quality management system, and strictly implement the post quality specifications, quality responsibilities and corresponding assessment methods.

Article 4 Producers and sellers shall bear responsibility for product quality in accordance with the provisions of this Law.

Summary. The inspection standard is to allow the thread part to be screwed with the internal thread at both ends of the workpiece, and the amount of screwing should not exceed two pitches; For workpiece threads with three or fewer pitches, they should not be fully screwed through.

From this report, it is possible to see if the ring gauge is qualified.

The inspection standard is to allow the thread part of the two source ends of the internal thread of the workpiece to be screwed, and the amount of screwing should not exceed two pitches; For workpiece threads with three or less screw imitation crack source distances, they should not be fully screwed through in the standby state.

It is the unqualified things of the ring gauge inspection to be tested, and now this report is unqualified to see if the ring gauge is unqualified.

Look at the calibration results that are unqualified.

Summary. The threaded ring gauge is a measuring tool used to detect the middle diameter of a standard external thread, two are a set, one is a general gauge and one is a stop gauge. The inner thread diameter of the two ring gauges is manufactured according to the limit size and the minimum limit size of the standard thread diameter respectively, and the accuracy is very high.

In terms of appearance, the end of the general gauge is longer than the end of the stop gauge.

How to use: Use two ring gauges to screw on the external thread to be detected (in any order).

1) However, the diameter of the thread is large, and the product is unqualified.

2) The stop gauge is passed, the middle diameter is small, and the product is unqualified.

3) The general gauge can rotate freely at any position of the thread, and the stop gauge can be screwed one to two or three times, (sometimes it can be screwed one or two more times, but the thread head does not have the end face of the ring gauge) can not be screwed, which means that the middle diameter of the external thread you detected is just within the "tolerance zone", which is a qualified product.

The threaded ring gauge is a measuring tool used to detect the middle diameter of a standard external thread, two are a set, one is a general gauge and one is a stop gauge. The inner thread diameter of the two ring gauges is manufactured according to the limit size and the minimum limit size of the standard thread diameter respectively, and the accuracy is very high. In terms of appearance, the end of the general gauge is longer than the end of the stop gauge.

How to use: Use two ring gauges to screw on the external thread to be detected (in any order). 1) However, the diameter of the thread is large, and the product is unqualified.

2) The stop gauge is passed, the middle diameter is small, and the product is unqualified. (3) The general gauge can be turned quietly and fluttering freely in any position of the screw hall, and the stop gauge is twisted one to two or three times, (it may sometimes be able to twist one or two more turns, but the thread head does not have the end face of the ring gauge) can not be screwed, which means that the middle diameter of the external thread you detected is just within the "tolerance zone", which is a qualified product.

The size is different.

The 6g thread is larger than the 6h thread, and it is about as large as the pitch is different. For example, pitch, large; pitch, large; Pitch 8, large. The internal thread inspection is to use the thread plug gauge, a set of two pieces (a general gauge, a stop gauge), and the thread qualification judgment rules:

The general gauge can be screwed into the internal thread, and the stop gauge is only allowed to screw in the internal thread at most 2 buckles. (can check to GB T3934, common thread gauge technical condition).

The commonly used grade for the external thread is 6g, (if the external thread is not marked with the tolerance zone grade, it means that the thread is 6g). The commonly used grade of the internal thread is 6H, (if the internal thread is not marked with the tolerance zone grade, it means that the thread is 6H).

6g and 6h both indicate the tolerance zone code, the detection is 6g and 6h of the external thread, if it is an internal thread, his tolerance grade is represented by an uppercase h or g, and the internal thread inspection is with a thread plug gauge.

It's just that the numbers of the tolerance zone are different, and the upper and lower differences are not the same distance from the zero line, but the tolerances are the same.

That is, the value of the upper difference minus the lower difference is the same, just like 2-1=4-3, a truth, 6h the lower difference is 0, the specific tolerance is to check GB-T 197-1981 ordinary thread tolerance and fit (diameter 1 355mm).