Category: Manufacturing Technology knowledge

01 Methods to prevent quenching cracks (1) Reasonably design part shape The design of equal wall thickness shall be adopted as far as possible to avoid abrupt changes in cross section shape: ① The parts with large difference in wall thickness shall not be made into a whole, and the mosaic structure shall be adopted so that each block can be as strong as possible; ② Large parts shall be designed as hollow structure as far as possible; ③ If necessary, process holes shall be opened; ④ Sharp corners shall be avoided at the corners of the contour, and larger…

When a sheet metal processing enterprise has just received a new production project to prepare for investment, it will face such a choice: should it buy a laser cutting equipment or a CNC punch? As we all know, in today's sheet metal processing industry, there seem to be ten thousand reasons to promote sheet metal processing enterprises to invest in laser cutting machines. In addition, with the increasingly vigorous development of the co processing business, many enterprises may start to consider gradually withdrawing the outsourcing processing business and plan to enter new business areas at the same time. If the…

The non-standard design work involves a wide range of aspects. Because the nature of the profession is to solve problems in all aspects, non-standard designers are required to have a wide range of knowledge and knowledge. The more knowledge, the more effective the work, the more knowledge, the more experience, the more methods to solve problems, the faster and more accurate. Today, I would like to share with you the mistakes that are easy to make and the details that are ignored in non-standard mechanical design. I hope it will be helpful to you! Major errors that must not occur…

There are many process parameters of ion nitriding. In addition to the common nitriding temperature and time, it is also related to furnace gas pressure, gas source, gas pressure and flow rate, voltage and current, gas extraction rate and other factors. 01 Nitriding temperature and time 1) The nitriding temperature of ion nitriding is basically the same as that of gas nitriding, generally 500~540 ℃. There is an optimal corresponding value between the nitriding hardness and temperature of different materials, generally 450~540 ℃. When the temperature is higher than 590 ℃, the hardness will decrease significantly due to the accumulation…

The role of four types of stainless steel and alloy elements Stainless steels can be divided into four types: austenitic, martensitic, ferritic and duplex stainless steels (Table 1). This is based on the metallographic structure of stainless steel at room temperature. When low carbon steel is heated to 1550 ℉, its structure changes from ferrite phase at room temperature to austenite phase. When cooling, the microstructure of low carbon steel is transformed into ferrite again. The austenite structure at high temperature is nonmagnetic, and its strength is smaller and toughness is better than that of room temperature ferrite. When the…

1、 Broken wire 1. Poor discharge state - reduce the P value. If the P value decreases greatly and the wire is still broken, consider reducing the I value until the wire is continuous. This operation will reduce the processing efficiency. If the wire breaks frequently, please refer to the following contents to find out the root cause of the wire break. 2. The liquid flushing state is not good, and the upper and lower nozzles cannot be veneered, or the broken wire is usually located in the processing area during open machining—— Lower the P value and check whether…

1. Reasons for bolt breakage: 1. It is caused by the materials of bolts. If the materials we choose are better, then the quality of our bolts will be better. If the materials we choose are relatively poor, our bolts will break more to a certain extent. 2. The strength of the bolt is not high enough. If the pressure that the bolt is under is greater than the strength of the bolt, the bolt will easily break. Therefore, when using the bolt, we'd better understand the strength that the bolt can withstand, so that we can choose the bolt…

In today's manufacturing enterprises, many enterprises appear that BOM management lags behind the market requirements for enterprise production efficiency in production management, which makes it necessary to improve the scientific nature of enterprise production management by improving the management mode of BOM to meet the future needs. Through the investigation of manufacturing enterprises, this paper collects the difficulties encountered by BOM in enterprise management at present, puts forward the favorable factors brought to enterprises by using BOM modular management, gives the measures that enterprises need to take in the process of implementing BOM modularization, as well as the principles and…

1. A Simple Method to Check the Quality of Welding Rods (1) The inspection of actual welds is to inspect the quality of welding rods through the actual welding seams. For high-quality welding rods, the arc burning is extremely stable during welding, the welding core and coating are evenly melted, with little splash, the weld is well formed and easy to deslagging. (2) Strength inspection of coating: lift the welding rod one meter high and drop it freely on the smooth thick steel plate. If the coating does not fall off, it will prove that the coating strength meets the…

1. The highest stator voltage of the generator shall not be greater than (110%) of the rated voltage, and the lowest voltage shall generally not be lower than (90%) of the rated voltage, and shall meet the requirements of (plant) voltage. 2. The normal operating frequency of the generator shall be maintained at (50) Hz, and the allowable variation range is (± 0.2) Hz. The generator can operate continuously according to the rated capacity. When the frequency changes, the stator current, excitation current and temperature of each part shall not exceed (rated value). 3. The generator stator voltage is allowed…