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PTJ Manufacturing Shop

What is metal machining?

What is metal machining?

Are you a metal machining enthusiast? Are you interested in complex artwork or logos made of metal? Well, welcome to the various applications in this industry, from metal marking, engraving, stamping and etching to grinding and milling, and we will show you the unique charm of different processing technologies.

auto parts machining



What is metalworking?

Metal processing is the production activity of applying various processes to metal materials to manufacture the required parts, production line components or overall large structure. Many large-scale projects, such as oil drilling platforms, ships, bridges, engines and other small parts, to jewelry, are made by metal machining. Therefore, it is necessary to use a wide range of technologies, processes and tools to deal with metals and ultimately achieve the desired results.

The process of metal processing can be divided into three categories: metal forming, metal cutting and metal joining.

In this paper, we will focus on the latest technology applied to metal cutting. Cutting is the process of removing material by using various tools to achieve the specified form of material. The finished parts shall meet the specified requirements in size, process, design and aesthetics. There are only two products of cutting - scrap and finished product. After the metal is cut, the scrap is called metal chip.

Cutting technology can be further divided into three categories:

- chip generation is divided into one category, also known as machining.

- classify the materials that burn, oxidize or evaporate into one group.

- a mixture of the two or other processes, such as chemical cutting.

Drilling in metal parts is the most common example of the first type (chip generation) process. Cutting steel plates into small pieces using a cutting torch is an example of a combustion category. Chemical grinding is an example of a special process that uses etching chemicals to remove excess material.

Cutting technology

There are many metal cutting technologies, such as:

  • - manual technology: such as sawing, chiseling and shearing.

  • - Mechanical Technology: such as stamping, grinding and milling.

  • - Welding / combustion technology: e.g. by laser, oxygen fuel combustion and plasma combustion.

  • - erosion technology: Machining with water jet, electric discharge or abrasive flow.

  • - Chemical Technology: photochemical processing or etching.
Galloping is a good starting point for understanding all the different types of metal cutting techniques available to you, and to be able to see all of these different cutting techniques

Several metal processing technologies

It is impossible to cover all of these technologies in one article. We will choose six of them and explain what they are, their respective tools and possible use cases.

Metal marking

Direct part marking is a series of permanent marking technology on metal, which is used for parts traceability, industrial parts labeling, decoration or any other purposes. When people began to use metal tools such as axes and spears, they had already marked the metal. Metal marking was as old as the invention of smelting technology. However, current technology has evolved to the level that allows humans to create high-precision and complex markers for any product imaginable. Marking can be achieved through a variety of technologies, including engraving, embossing, die casting, stamping, etching and grinding.

Metal carving

Engraving is a technique that is mainly used to carve patterns, words, pictures or codes on metal surface to obtain products with permanent marks, or to print engraving on paper with carved metal. Carving mainly uses laser and mechanical carving. Although laser technology has become very versatile and easy to use, it provides us with the highest quality metal engraving process, because it is computer-aided processing and can precisely schedule various surfaces for the best engraving effect. Mechanical engraving can be done by hand or by more reliable scaler or CNC machine tool.

Metal engraving technology can be used for personalized jewelry, fine arts, optical polymer laser imaging, industrial marking technology, carving sports cup, printing plate production, etc.

Metal stamping

Metal stamping is not a cutting process. It uses a mold to fold metal plates into various shapes. The household utensils we usually come into contact with, such as pans, spoons, cooking pots and plates, are all made by stamping. Presses are also used to make ceiling materials, medical equipment, machine parts and even coins. Its products are widely used in medical, electronic, electrical, automotive, military, HVAC, pharmaceutical, commercial and mechanical manufacturing industries.

There are two kinds of metal stamping machines: mechanical and hydraulic. Stainless steel, aluminum, zinc and copper sheets are generally cast, punched and cut into three-dimensional objects by these machines. Because they are relatively easy to process, they have very high product turnover. The press can be arranged in series to process the metal raw materials, which are converted into finished parts and separated from the processing line by different steps.

Press is widely used and can produce a variety of products. These products come in different sizes and designs, and most are used for industrial purposes. Usually, you just send the sample and sheet metal to a metal stamping company and you can get the product you want.

metal etching

Etching can be achieved by photochemical or laser technology. Laser etching is a popular technology at present. Over time, the technology has developed exponentially. It refers to passing through the metal



PTJ Machining Capabilities

Automatic Bar Machining capacity for parts from 1/16" to 2 5/8”
CNC Turning – CNC multi-axis machining centers for superior speed & flexibility
Custom Machining - expert machined components delivered on time
Multi Spindle Machining- Davenport, Euro turn, New Britain & Acme Gridley
Screw Machine Products – precision components from a broad variety of materials & Equipment
Swiss Machining – micro-parts to 1-1/4 round diameter providing speed, high capability including precision tolerances and specialized finishes
High Volume Machining – Specialized in machined parts exceeding 1,000 pieces up to millions of pieces for optimum efficiency
CNC Milling - Machining from bar stock, plate or block metal using up to 3 axis of motion
5 axis (11 axis) Machining – Multi Axis Multi spindle technology for completing complex parts efficiently in one operation. C=0 sampling plan & equipment versatility provide one stop shop capability for a variety of applications

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