Phone:
86-15852949220
NANJING ALAS INTERNATIONAL CO., LTD
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Our company specializes in the research, development, production, and sales of core cutting tools and accessories for the rebar processing industry. We professionally manufacture rebar cutting blades, rebar bending blades, and a full range of rebar machinery accessories. Our products are widely compatible with various rebar processing equipment, including rebar cutting machines, rebar bending machines, and rebar straightening and cutting integrated machines, serving multiple applications in construction engineering, bridges and tunnels, rebar processing plants, and precast component production lines.
In the production of core cutting tools, e insist on using high-quality materials and precision processes to ensure product performance. Our rebar cutting blades undergo overall quenching and low-temperature tempering treatment, possessing both high wear resistance and impact resistance. The cutting edge is finely ground and polished, ensuring smooth and efficient cutting without jamming, easily handling batch cutting of various types of rebar. The blades feature a square modular design, allowing for four-sided rotation, significantly reducing replacement and maintenance costs. Rebar bending blades can be customized according to the bending machine model and bending radius requirements. After precise heat treatment, they exhibit excellent fatigue resistance and dimensional stability. The bending angle is precise with no rebound, enabling multi-angle bending of rebar and adapting to the forming processing of different specifications of rebar, eliminating problems such as chipping and deformation.
Our comprehensive system of supporting rebar machinery accessories includes a full range of components such as fixed blade holders, connecting rods, sliders, and gear shafts for cutting machines; central shafts, bending discs, clamps, and positioning baffles for bending machines; and straightening wheels, traction wheels, and cutter assemblies for straightening machines. All accessories are manufactured strictly according to the original equipment manufacturer's standards, with high dimensional accuracy and perfect compatibility with the main machine, ensuring easy installation. The surface of the accessories is treated with processes such as carburizing and quenching, and galvanizing and passivation, providing rust resistance and wear resistance, effectively extending the service life of the entire equipment.
The company possesses advanced CNC machining centers and hardness and precision testing equipment. From raw material procurement to finished product delivery, every process undergoes strict quality inspection. We also support non-standard customization services, designing and manufacturing specialized cutting tools and accessories based on customer equipment models, processing conditions, and specific needs, helping customers improve rebar processing efficiency and reduce production costs with reliable quality.
The bending machine pin is the core load-bearing component in steel bar bending, subjected to radial compression, torsional shear, and repeated friction. Heat treatment hardness directly determines its service life, working stability, and operational safety. Pins without appropriate hardness will fail quickly, leading to equipment malfunctions and even processing accidents.
The pin is in direct contact with the steel bar and the bending disc/forming shaft. Steel bars (especially rebar) have high hardness, and there is relative sliding during bending. If the pin's hardness is insufficient (HRC is too low), the surface will quickly show wear marks, dents, or even deformation, leading to increased clearance between the pin and its components, resulting in uncontrolled bending angle and accuracy, failing to meet processing requirements.
A qualified pin, after heat treatment, requires a surface hardness of HRC45~55 (the core load-bearing surface can be surface hardened to HRC58~62), effectively resisting wear and maintaining dimensional stability.
When bending steel bars, the pin must withstand the enormous radial compressive force and slight torsional force generated by the bending process. If the hardness is insufficient, the pin is prone to plastic deformation (such as bending or necking); if the hardness and toughness are not properly matched (hard but not tough), it is prone to brittle fracture under repeated loads.
A pin treated with tempering (quenching + high-temperature tempering), with a hardness controlled at HRC45~55, can simultaneously ensure both strength and toughness, resisting compression without deformation and withstanding repeated loads without brittle fracture, avoiding safety hazards such as equipment jamming and flying steel bars caused by pin fracture.
Pins with qualified hardness and proper processing have a slow wear rate and are not prone to failure, eliminating the need for frequent disassembly and replacement. If the pin's hardness is insufficient, it will require replacement in a short time due to wear/deformation, which not only increases parts costs but also affects construction progress due to equipment downtime. In short: Heat treatment hardness is the core guarantee for the wear resistance, deformation resistance, and fracture resistance of the pin shaft, and is a fundamental process indicator for matching the working load of the bending machine. Pin shafts without reasonable hardness cannot meet the working conditions requirements of steel bar bending.
The core of customizing special-shaped pin shafts is to enable the processing party to accurately match the equipment installation, force requirements, and external dimensions. The drawings need to indicate basic dimensions, process requirements, and material requirements. The specific details are as follows:
Diameter of each section of the pin shaft + tolerance (e.g., h6/h7, the mating section needs to be precise, the non-mating section can be marked f8); length of each section + tolerance;
Dimensions of special-shaped structures (e.g., keyway/groove width/depth, taper angle/taper section length, no transition angle needs to be clearly marked);
End dimensions (e.g., flat head/round head/countersunk head, round head needs to indicate the spherical radius, countersunk head needs to indicate the countersunk hole depth/diameter).
Heat treatment process: Clearly specify the overall process (e.g., tempering, surface hardening + tempering) + hardness value (e.g., overall tempering HRC45~50, surface hardening HRC58~62, the hardness testing position needs to be indicated);
Base material grade: Recommended materials for bending machine pin shafts (45# steel, 40Cr, 40Cr is preferred for special-shaped heavy-duty pin shafts)
Chinese GB standards | American AISI/SAE standards | Japanese JIS standards | German DIN standards | Russian GOST standardss |
45#steel | 1045 | S45C | C45（1.1191） | 45 |
40Cr | 5140 | SCr440、SCr440H | 41Cr4（1.7035） | 40X |
Our company specializes in the research, development, production, and sales of core cutting tools and accessories for the rebar processing industry. We professionally manufacture rebar cutting blades, rebar bending blades, and a full range of rebar machinery accessories. Our products are widely compatible with various rebar processing equipment, including rebar cutting machines, rebar bending machines, and rebar straightening and cutting integrated machines, serving multiple applications in construction engineering, bridges and tunnels, rebar processing plants, and precast component production lines.
In the production of core cutting tools, e insist on using high-quality materials and precision processes to ensure product performance. Our rebar cutting blades undergo overall quenching and low-temperature tempering treatment, possessing both high wear resistance and impact resistance. The cutting edge is finely ground and polished, ensuring smooth and efficient cutting without jamming, easily handling batch cutting of various types of rebar. The blades feature a square modular design, allowing for four-sided rotation, significantly reducing replacement and maintenance costs. Rebar bending blades can be customized according to the bending machine model and bending radius requirements. After precise heat treatment, they exhibit excellent fatigue resistance and dimensional stability. The bending angle is precise with no rebound, enabling multi-angle bending of rebar and adapting to the forming processing of different specifications of rebar, eliminating problems such as chipping and deformation.
Our comprehensive system of supporting rebar machinery accessories includes a full range of components such as fixed blade holders, connecting rods, sliders, and gear shafts for cutting machines; central shafts, bending discs, clamps, and positioning baffles for bending machines; and straightening wheels, traction wheels, and cutter assemblies for straightening machines. All accessories are manufactured strictly according to the original equipment manufacturer's standards, with high dimensional accuracy and perfect compatibility with the main machine, ensuring easy installation. The surface of the accessories is treated with processes such as carburizing and quenching, and galvanizing and passivation, providing rust resistance and wear resistance, effectively extending the service life of the entire equipment.
The company possesses advanced CNC machining centers and hardness and precision testing equipment. From raw material procurement to finished product delivery, every process undergoes strict quality inspection. We also support non-standard customization services, designing and manufacturing specialized cutting tools and accessories based on customer equipment models, processing conditions, and specific needs, helping customers improve rebar processing efficiency and reduce production costs with reliable quality.
The bending machine pin is the core load-bearing component in steel bar bending, subjected to radial compression, torsional shear, and repeated friction. Heat treatment hardness directly determines its service life, working stability, and operational safety. Pins without appropriate hardness will fail quickly, leading to equipment malfunctions and even processing accidents.
The pin is in direct contact with the steel bar and the bending disc/forming shaft. Steel bars (especially rebar) have high hardness, and there is relative sliding during bending. If the pin's hardness is insufficient (HRC is too low), the surface will quickly show wear marks, dents, or even deformation, leading to increased clearance between the pin and its components, resulting in uncontrolled bending angle and accuracy, failing to meet processing requirements.
A qualified pin, after heat treatment, requires a surface hardness of HRC45~55 (the core load-bearing surface can be surface hardened to HRC58~62), effectively resisting wear and maintaining dimensional stability.
When bending steel bars, the pin must withstand the enormous radial compressive force and slight torsional force generated by the bending process. If the hardness is insufficient, the pin is prone to plastic deformation (such as bending or necking); if the hardness and toughness are not properly matched (hard but not tough), it is prone to brittle fracture under repeated loads.
A pin treated with tempering (quenching + high-temperature tempering), with a hardness controlled at HRC45~55, can simultaneously ensure both strength and toughness, resisting compression without deformation and withstanding repeated loads without brittle fracture, avoiding safety hazards such as equipment jamming and flying steel bars caused by pin fracture.
Pins with qualified hardness and proper processing have a slow wear rate and are not prone to failure, eliminating the need for frequent disassembly and replacement. If the pin's hardness is insufficient, it will require replacement in a short time due to wear/deformation, which not only increases parts costs but also affects construction progress due to equipment downtime. In short: Heat treatment hardness is the core guarantee for the wear resistance, deformation resistance, and fracture resistance of the pin shaft, and is a fundamental process indicator for matching the working load of the bending machine. Pin shafts without reasonable hardness cannot meet the working conditions requirements of steel bar bending.
The core of customizing special-shaped pin shafts is to enable the processing party to accurately match the equipment installation, force requirements, and external dimensions. The drawings need to indicate basic dimensions, process requirements, and material requirements. The specific details are as follows:
Diameter of each section of the pin shaft + tolerance (e.g., h6/h7, the mating section needs to be precise, the non-mating section can be marked f8); length of each section + tolerance;
Dimensions of special-shaped structures (e.g., keyway/groove width/depth, taper angle/taper section length, no transition angle needs to be clearly marked);
End dimensions (e.g., flat head/round head/countersunk head, round head needs to indicate the spherical radius, countersunk head needs to indicate the countersunk hole depth/diameter).
Heat treatment process: Clearly specify the overall process (e.g., tempering, surface hardening + tempering) + hardness value (e.g., overall tempering HRC45~50, surface hardening HRC58~62, the hardness testing position needs to be indicated);
Base material grade: Recommended materials for bending machine pin shafts (45# steel, 40Cr, 40Cr is preferred for special-shaped heavy-duty pin shafts)
Chinese GB standards | American AISI/SAE standards | Japanese JIS standards | German DIN standards | Russian GOST standardss |
45#steel | 1045 | S45C | C45（1.1191） | 45 |
40Cr | 5140 | SCr440、SCr440H | 41Cr4（1.7035） | 40X |