Status of cutting machine usage:
1. The mechanical transmission cutting machine, although there are still manufacturers to continue production, some small, individual manufacturers are still using, but this form of cutting machine is bound to be eliminated.
2. Hydraulic-powered cutting machines remain the dominant choice in the industry. Among these, swing-arm models with capacities ranging from 8 to 20 tons are widely adopted. Flatbed and gantry-type machines, on the other hand, are primarily used by larger manufacturers, particularly for processing leather and non-metallic materials such as synthetic fabrics.
3. Fully automatic cutting machine has been used in China, due to the improvement of the degree of industrial modernization of manufacturing industry, there will be a certain market in the near future.
(1) The “Surface First, Then Holes” Principle. When machining bracket and housing components for cutting machines, prioritize processing primary planes (including some secondary larger planes) before creating mounting holes. Using planes as reference points for hole formation provides a stable and reliable positioning basis, ensuring both machining accuracy and technical specifications. Moreover, since primary planes serve as assembly references for brackets and housings in machine tool L, processing them first allows precise alignment between positioning coordinates and assembly points, effectively eliminating positioning errors caused by misaligned reference planes.
(2) Rough-precision separation principle. For bracket housing components with high precision requirements and rigid structures, separating roughing and finishing operations is generally recommended to minimize deformation during machining. Specifically, rough machining of the main planes and support holes should precede precision finishing of the rod surfaces. This approach facilitates time-temperature treatment between roughing and finishing processes while ensuring machining accuracy. For bracket housing components with relatively lower precision requirements and better rigidity, separate roughing and finishing operations may not be necessary.
Based on the two principles mentioned above, the manufacturing process for high-precision box-shaped components involves the following steps: casting the blank, slow-heat treatment, marking, adding [main plane], rough machining of support holes, aging treatment, marking again, precision machining of main planes, precision machining of support holes, processing other secondary surfaces, and inspection.
What is the role of heat treatment in the mechanical manufacturing industry of cutting press machine manufacturers
The purpose of heat treatment in hydraulic cutting machine manufacturers is to improve the mechanical properties of materials, eliminate residual stresses, and improve the machinability of metals. According to the different purposes of heat treatment, heat treatment processes can be divided into two categories: preparatory heat treatment and final heat treatment.
1. Preheating treatment
The purpose of preparatory heat treatment is to improve the processing properties, eliminate internal stress and prepare a good metallographic structure for the final heat treatment. Its heat treatment processes include annealing, normalizing, aging, tempering and so on.
(1) Annealing and normalizing of cutting machines. Annealing and normalizing are applied to hot-worked blanks. Carbon steels and alloy steels with carbon content exceeding 0.5% undergo annealing to reduce hardness and improve machinability. For steels with carbon content below 0.5%, normalizing is employed to prevent excessive hardness from causing tool adhesion during cutting. These processes refine grain structure and homogenize microstructure, preparing the material for subsequent heat treatments. Typically, annealing and normalizing are scheduled after blank manufacturing and before rough machining.
(2) Aging Treatment Aging treatment is primarily used to eliminate internal stresses generated during raw material manufacturing and mechanical processing. To avoid excessive transportation workload, parts with general precision requirements can undergo one aging treatment cycle before finishing. However, components requiring higher precision should undergo two or multiple aging treatment processes. Simple parts generally do not require aging treatment. Except for castings, some rigid precision parts often undergo multiple aging treatments between rough machining and semi-finishing stages to eliminate internal stresses and stabilize machining accuracy. For certain shaft components, aging treatment should also be scheduled after the straightening process.
(3) Tempering: This process involves high-temperature tempering after quenching, which produces a uniform and fine tempered sorbite structure. It prepares the material for subsequent surface quenching and nitriding treatments by minimizing deformation. Therefore, tempering can also serve as a preparatory heat treatment. The concept of surface roughness in cutting machines.
In mechanical part manufacturing, factors such as tool chatter marks, plastic deformation during chip separation, and machine tool vibrations inevitably leave microscopic surface irregularities. These uneven features, consisting of minute ridges and valleys, become visible to the naked eye after rough machining and can still be observed under magnification with a microscope or loupe after precision finishing. The degree of elevation and spacing between these microscopic peaks and valleys on a part’s surface is defined as surface roughness, also known as micro-irregularity.
Because the comprehensive mechanical properties of the parts after tempering are better, for some parts with low requirements for hardness and wear resistance, it can also be used as the final heat treatment process.
2. Final heat treatment
The purpose of the final heat treatment of the hydraulic cutting machine is to improve the mechanical properties such as hardness, wear resistance and strength.
(1) Quenching Quenching includes surface quenching and overall quenching. Surface quenching is more widely used due to its lower deformation, oxidation, and decarburization rates. It offers advantages such as high external strength, excellent wear resistance, and maintains good internal toughness and impact resistance. To enhance the mechanical properties of surface quenched parts, heat treatments like tempering or normalizing are often required as preparatory processes. The standard process sequence is: cutting → forging → normalizing → rough machining → tempering → semi-finishing → surface quenching → finishing.
(2) Carburizing and Quenching. This process is suitable for low-carbon steel and low-alloy steel. It involves first increasing the carbon content in the surface layer of the part, then quenching to achieve high surface hardness while maintaining core strength, toughness, and plasticity. Carburizing can be performed as either overall or localized. For localized carburizing, anti-carburizing measures must be taken for non-carburized areas. Due to significant deformation during the process and a typical carburizing depth of 0.5-2mm, the carburizing step is usually scheduled between semi-finishing and finishing operations. The standard process sequence includes: cutting—forging—normalizing—rough/semi-finishing—carburizing and quenching—finishing.
When the non-carbureted part of the locally carburized part adopts the process scheme of increasing the allowance and removing the excess carbureted layer, the process of removing the excess carbureted layer should be arranged after carburizing and before quenching.
(3) Nitriding Treatment Nitriding is a process that allows nitrogen atoms to penetrate the metal surface, forming a layer of nitrogen-containing compounds. This nitriding layer enhances the surface hardness, wear resistance, fatigue strength, and corrosion resistance of components. Given that nitriding requires lower temperatures, minimal deformation, and a thin nitriding layer, the nitriding process should be scheduled as late as possible in the production sequence. To reduce deformation during nitriding, high-temperature tempering is typically performed after machining to relieve residual stresses.
The concept of heat treatment in machining is extensive. To ensure materials achieve the required hardness and properties for machining, heat treatment processes such as quenching, tempering, normalizing, annealing, galvanizing, chromium plating, and carburizing are essential. These processes are crucial for successful mechanical processing.
Post time: Nov-09-2025