Basic information of cold heading machine

Cold heading machines are special equipment mainly used for mass production of fasteners such as nuts and bolts.

The world's earliest cold heading machine originated from Germany. The purpose of developing cold heading machines was mainly to create large quantities of bullet shells during World War II.

Cold heading process

(1) According to the metal plastic deformation theory, apply a certain pressure to the metal blank at room temperature to cause plastic deformation in the mold cavity and form according to the specified shape and size.

(2) It is necessary to select high-quality "plastic transformation" metal materials, such as riveted screw steel, with strict standards for their chemical composition and mechanical properties.

(3) Cold heading bolts and nut forming machinery have multiple models and multiple series of machine types. The equipment performance is reliable, the efficiency is high, and the product quality is stable.

(4) The product forming and forging force is large, the configuration power is high, and the equipment is invested at one time. Therefore, the production specifications below M24 are the most economical.

(5) Have good surface quality and high dimensional accuracy. Due to the cold hardening during the upsetting process, the deformation should not be too large to reduce cracking.

(6) The cold heading process is applicable to products of large batches and various specifications, so as to reduce costs.

Modern cold heading machines have been added from the past simple 2 stations to multiple stations. The newer domestic varieties include 5-mode 6-mode 6-mode lengthened cold heading machines.

Common models

Z12 series double-click mold automatic cold heading machine

This machine uses plate material and straight rod material, and uses the principle of two upsetting to produce various element heads, countersunk heads, semi countersunk heads, internal 6 corners and other non-standard head-shaped bolts and mechanical parts. The equipment is easy to operate and simple to process. It can be customized as a male mold to launch a slender specification protection device and pull-out mechanism.

z18-52 die 4-pressing cold heading machine, mainly used for screws,rivetProduction of fasteners.

Z41-24 multi-station automatic nut cold heading machine

This machine is a special cold heading equipment for producing 6-corner nut blanks. The material on the rod material is fed through the rollers, and then cuts, ball pressing, angle pressing, punching, and forming in sequence. One machine can be automatically completed. It is suitable for batch or professional production of nut standard parts manufacturers and large and medium-sized enterprises that use standard parts and nuts. Note: According to user requirements, non-standard molding automatic cold heading machines such as 6-stations and 7-stations can be specially produced.

Z41-30 multi-station automatic nut cold heading machine

This machine is a special cold heading equipment for producing 6-corner nut blanks. The material on the rod material is fed through the rollers, and then cuts it in turn, pressing the ball, pressing the angle, and punching to form four sequences. One machine can be automatically completed. It is suitable for batch or professional production of nut standard parts manufacturers and large and medium-sized enterprises that use standard parts and nuts in large and medium-sized enterprises.

ZS308 multi-station high-speed automatic cold heading machine

The ZS308 multi-station high-speed automatic cold heading machine is an efficient automatic equipment used to manufacture screws (bolts). The upsetting stations of this machine tool are arranged horizontally. The cold-drawing disc (rod) materials are cut, initial punch, fine punch, wire rub and other processes. The finished screws (bolts) are continuously manufactured.

11B-33B multi-station high-speed nuts and5 gold partsForming machine

This model is the most advanced model, which can produce various special-shaped parts, especially the production of hole-shaped parts and standard nuts. It has the characteristics of high accuracy (inner diameter tolerance 0.03mm, outer diameter 0.10mm) and fast speed (80-240 pieces per minute). It has a small sound during production, and the fully sealed production makes the production safer and cleaner.

Safety operating procedures of cold heading machines

1. It is prohibited to wear gloves to operate the cold heading machine.

2. Before driving, you must carefully check whether the fasteners of the equipment are locked and whether the safety protection devices are intact. You must check frequently during work to prevent loosening due to violent vibrations and causing accidents.

3. After the equipment is adjusted, first turn the flywheel to check whether the working of each mechanism is normal. Only after removing the wrench rod for the puller can the motor be started. It is strictly forbidden to start the motor while pulling the truck.

4. All faults should be eliminated before starting the machine and a short time-lapse rotation can be performed before trial upsetting can be carried out.

5. When the equipment is running, the operator should stand in a safe position. It is strictly forbidden to pick up workpieces at the bumps. Only the product can be viewed at the lower end.

6. When replacing the product, you must carefully adjust the mold and punch, and carefully check whether each component is normal.

7. During the production process, if a failure occurs, the car must be stopped immediately, the cause must be found, and the hidden dangers must be eliminated. When the brake fails, driving is strictly prohibited.

8. The fuse plate (bumper) must be equipped with protective devices to avoid rupture and accidents. All protective devices must not be disassembled or lost at will.