Category: Manufacturing Technology knowledge

With the increase of market demand for machining, the technical accuracy of machining is also improved, and the types of machine tools are more and more. According to the classification of processing methods and tools used, machine tools are classified into 11 categories: lathe, drilling machine, boring machine, grinder, gear processing machine, thread processing machine, milling machine, planer, puller, sawing machine, etc. There are seven categories of commonly used boring machines, grinders, lathes, planers, milling machines, drilling machines, and gear processing machines Boring machine The boring machine is suitable for plane milling and hole series processing of single or small…

Heat treatment refers to a metal heat processing process that facilitates processing and improves the strength or hardness of finished products by heating, holding and cooling materials in solid state. This process is usually used to treat steel workpieces before and after CNC machining. The purpose of heat treatment of CNC machining materials is mainly to improve the mechanical properties of metal materials, give full play to the potential of materials, save materials and extend the service life of parts. Secondly, heat treatment can eliminate the residual stress of materials, improve the performance, and facilitate the cutting of materials Heat…

With the development of science and technology, the requirements for injection molding process are becoming higher and higher. The choice of injection molding mainly depends on the type of plastic, the initial shape, and the shape and size of the product. The common methods of injection molding include extrusion, injection molding, blow molding and calendering. Each method has its advantages and disadvantages, and is more suitable for specific applications. injection molding Injection molding: also known as injection molding, its principle is to add granular or powdery raw materials into the hopper of the injection machine. The raw materials are heated…

What to do if the paint strength is insufficient? There are two cases of insufficient coating strength: one is the normal drying strength, the other is the strength after high temperature washing. The two cannot be replaced. The normal drying strength is high ≠ the high temperature strength, and accidents will occur if misunderstood. 1. There are three reasons for insufficient drying intensity First, the performance of additives is insufficient; second, the amount of additives is insufficient; third, there is a problem with aggregate powder. The former two are easy to understand, while the latter may not be universally and…

This paper summarizes some problems of stamping die and lists some corresponding solutions for your reference. 1. Scrap jumping 1) The length of the punch is not enough, and the punch shall be replaced according to the thickness of one material cut into the female die by the cutting edge of the punch plus 1mm 2) If the clearance of the female die is too large, cut in the die to reduce the clearance or use a draper to reduce the clearance 3) If the punch or template is not demagnetized, demagnetize the punch or template with a demagnetizer 2.…

1、 Flow marks and patterns Visual inspection: the casting surface has stripes consistent with the flow direction of liquid metal, and has obvious non directional veins different from the color of the metal substrate, without development trend. 1. The causes of flow marks are as follows: 1) Too low mold temperature 2) Poor runner design and poor internal gate position 3) Material temperature is too low 4) Low filling speed and short filling time 5) Unreasonable gating system 6) Poor exhaust 7) Spray is unreasonable 2. The pattern is caused by excessive coating or poor coating quality in the mold…

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…