Metal stamping hardness testing using Rockwell hardness tester. Small, stamping parts with complex shapes can be used to test flat is very small, not in an ordinary desktop Rockwell hardness tester on the test. PHP Series portable Rockwell hardness tester surface is applied to test the hardness of stampings.

Stamping is a metal processing, machinery manufacturing the most commonly used parts. Stamping process is the use of molds to make metal plates with a separation or forming occurred processing methods. Very broad range of applications.

Stamping parts machining, including blanking, bending, deep drawing, forming, finishing and other processes. Stamping parts processing materials are mainly hot-rolled or cold-rolled (in cold-based) of the metal plate with a material, such as carbon steel plate, steel plate, spring steel, galvanized sheet, tin plate, stainless steel, copper and copper alloy board, aluminum and aluminum alloy panels.

Hardness testing of metallic materials processing in the stamping parts is of great significance. Pressing the hardness testing industry can be divided into the following three parts:

1, the raw materials into the factory testing.

2, mold hardness test.

3, stamping parts stamping parts finished intermediate products and hardness testing.

Are respectively introduced as follows:

1, stampings hardness testing
Stamping parts material hardness, its main purpose is to determine the extent acquired by annealing the suitability of sheet metal to be carried out followed by processing of stamping parts, different kinds of stamping parts processing technology, require different levels of plate hardness.

Hot-rolled steel plate is usually thick, steel and general provisions of the standard used to detect the hardness of Brinell hardness tester. Rockwell hardness testing hot-rolled steel plate is feasible, and can be used HRB ruler. Portable Rockwell Hardness Tester for testing hot-rolled steel plate, you can not be tested under the conditions of sampling, the operation is very simple.

All kinds of stamping parts for the processing of cold-rolled steel used mainly to detect the hardness of Rockwell hardness tester, usually HRB ruler, hard to use HRC ruler. Sheet materials can be used Webster Hardness Tester, you can also use the surface Rockwell hardness tester HRN or HRT ruler.

Stamping parts for the processing of the yellow copper Rockwell hardness can be detected thousands of HRB ruler. Soft yellow copper and copper plate using HRF ruler. Thinner gauge sheet used HRT.

Stamping parts for the processing of aluminum alloy plate can be used Webster hardness testing, material thickness is greater than 13mm may switch to Pakistan hardness tester, pure aluminum or aluminum alloy plates should be used with low hardness Barcol hardness tester.

Stamping parts for the processing of thin sheet metal can be surface Rockwell hardness of HR30T ruler and in line with diamond points, Anvil, in this way test HR30Tm hardness value. The test sheet thickness is less than 0.05mm. This test method is the national standard GB / T 230.1-2004 been provided in Appendix A. Rockwell hardness of the surface can also be used for HR15T and HR45T ruler, after the test converted into HR30Tm hardness value.

Shenyang Star produced by PHR Series Portable Rockwell / surface Rockwell hardness tester can be sold in the material warehouse or field use of the plate into the plant to test need not be sampled. It can be moved to the procurement of raw materials before the test phase. Can carry the equipment to the steel factory or steel products to the market to buy materials, to confirm the hardness plate to meet the requirements before purchase.

2, stamping mold hardness test
Stamping die mold the main material is steel (including tool steel and high-speed steel), sometimes used in cemented carbide.

Stamping dies usually require high hardness and wear resistance, heat treatment is essential.

Die Steel mainly uses the Rockwell hardness test hardness test hardness HRC. When the mold large, inconvenience moving can be used Leeb Hardness Tester. Carbide hardness testing using Rockwell hardness HRA ruler.

In order to obtain high surface hardness and wear resistance, and many die and stamping parts stamping die components to be surface heat treatment, such as the surface nitriding. For such people are very concerned about the mold on its surface hardness and hardened layer depth. For the volume is not too large, mobile and convenient punching mold can be directly on the surface Rockwell hardness tester to test the value of the surface hardness of HRN. Bulky and difficult to move the sample had to use cutting methods, sampling the surface after testing Rockwell hardness tester HRN value. Can also be used Vickers hardness tester test HV value. Another approach is to use the same material made of small test piece, heat-treated under the same conditions, and then measured the hardness values of the specimen as a way to estimate the hardness of die stampings.

The company's PHR Series Portable Rockwell Hardness Tester can be used for the surface of a small part of the stamping die surface hardness test. Unfortunately, this instrument is only the biggest opening 50mm, many large some of stamping dies can not be tested. Openings for 100mm and 200mm surface Rockwell hardness tester being developed, will be a large part of stamping dies can be tested in the field.

Surface heat treatment stamping dies can be hardened layer depth of the Vickers or Knoop hardness test. Detection methods can refer to the website author's other articles.

After testing the surface of heat-treated hardness of die steel stamping parts, there is a wrong practice should be corrected. This is the inappropriate use of such an occasion Leeb hardness tester. Leeb Hardness Tester has the advantage of lightweight, with a computer, easy to use, converted into a variety of hardness values very convenient. But the problem is that it can only be tested heavy workpieces, the test material with a single piece. For the surface-hardened layer of the workpiece can not identify accurately the hardness value, because it is not a single piece of material. This is the principle of Leeb hardness tester decision. Cloth, Luo, Victoria three kinds of commonly used hardness tester are based on the principle of static test, is a slow rigid indenter pressed into the surface of the sample, and then test indentation depth or size, to determine the size of the hardness values. The Leeb hardness tester is used in dynamic testing principles. It is a sphere of specified quality and to provide for the impact speed of the specimen surface, test its speed and the beginning of the rebound speed is poor, in order to determine the hardness of the sample values. Leeb Hardness Tester is a test material by a reaction force to determine hardness. It is to be imposed on the kinetic energy of the specimen along the direction of force delivered to the deep part (at least to a depth of a few centimeters). To understand this point, as long as the Leeb hardness tester look at the standard hardness blocks of how thick the clear. If there are two the same size, the same hardness of the workpiece, the surface again with the same process carried out nitrogen treatment, the same hardness of the nitrided layer, but the thickness of 1 to 0.5mm, the other is 1.0mm. At this time If Leeb hardness test hardness of the workpiece will obviously come to different results. Obviously, it is measured hardness value is neither out of the hardness of nitrided layer, nor is the hardness of the substrate, but the results of the two together, because the surface layer thickness, will inevitably arrive at different results. Concluded that the Leeb Hardness Tester can not be used with a hardened layer of the workpiece.

3, stamping parts stamping parts manufactures intermediate products and the hardness testing
Stamping parts stamping parts intermediate products and finished products can be used hardness test Rockwell hardness tester. Some of stamping parts is relatively small, but also with more complex shapes can be used to test the plane is small, such as stamping parts can not be detected on ordinary desktop hardness. The company's portable Rockwell / Rockwell superficial hardness test small parts can be coupled with a dedicated point-anvil, and its bearing surface is very small, a number of complex shape of small stampings using this instrument can be detected. The instrument, if accompanied by a supporting cast made of blocks, you can also put your desktop taken in the use of desktop computers, you can make batches of small stamping parts piece by piece inspection.

For a variety of sheet metal stamping parts, you can use the company's portable surface Rockwell hardness testing. For the very thin stamping parts, you can use the company's portable surface Rockwell hardness tester with diamond-point anvil to test their HR30Tm hardness. For punching into a thin tube-shaped stamping parts, you can use the company's portable pipe Rockwell hardness testing, stamping parts inside the hole diameter can be as small as 4.8mm.

In short, the hardness test for the metal stamping parts processing industry is important to the vast majority of cases can be used hardness tester for testing. The company's portable Rockwell / Rockwell hardness tester because of the surface of portable, high accuracy, low price, the test is simple. In the stamping parts processing industry has a broad application prospects. This instrument deserves attention and adoption.