Continuous Steel Grinding Ball Skew Rolling Mill
Adjustable feed angle accommodates multiple specifications on a single machine.
Axially adjustable rolls ensure precise groove alignment.
Pneumatic pusher ensures accurate, stable feeding into the rolls.
Product Introduction
The Continuous Steel Grinding Ball Skew Rolling Mill is a core piece of equipment independently developed by Muren. It is designed to continuously roll heated round steel billets into steel grinding balls, bearing ball blanks, and other spherical metal components. Based on the principle of helical-groove skew rolling, the machine enables continuous ball formation, producing multiple steel balls per roll revolution.
Technical Specifications
|
Parameter |
Value |
|
Applicable steel ball size |
φ20–φ125 mm |
|
Hourly output |
0.5–25 t/h |
|
Main motor power |
30–1000 kW |
|
Heating temperature |
850–1100 ℃ |
|
Applicable materials |
Medium carbon steel, low alloy steel, 65Mn, B2, B3, GCr15, etc. |
|
Surface hardness of steel ball |
57–67 HRC |
|
Hardness difference (surface vs. core) |
<5 HRC |
|
Breakage rate of steel balls |
<1% |
Product Features
Utilizes the helical-groove skew rolling principle with two crossed rolls rotating in the same direction; the billet undergoes continuous deformation within the grooves, and the connecting necks between balls naturally fracture, enabling continuous production.
01
Produces two, three, or four steel balls per roll revolution (depending on groove design), allowing for flexible selection based on output requirements.
02
Capable of rolling various materials-including medium-carbon steel, low-alloy steel, 65Mn, B2, B3, and GCr15-to meet diverse hardness and wear-resistance specifications.
03
The main unit comprises the working assembly, roll assembly, guide plate system, drive system, and feeding mechanism; modular assembly facilitates easy maintenance and component replacement.
04
Can integrate features such as automatic rolling-temperature control, automatic rapid roll retraction, and precision feeding; it can be combined with heating, quenching, and tempering equipment to form a continuous production line.
05
Operation and Maintenance Essentials
Pre-start Checks: Ensure rolls and guide plates are correctly installed; verify lubrication system oil levels; check pneumatic and electrical systems for anomalies; ensure cooling water circuits are unobstructed.
In-operation Monitoring: Monitor heating temperature, rolling current, and equipment noise; conduct periodic spot checks on steel ball dimensions and surface quality; stop the machine immediately if a rolling jam occurs.
Roll Changing and Adjustment: Disconnect and lock out power before changing rolls; adjust guide plate clearance, roll feed angle, and phase angle; after a product changeover, perform a trial run to verify dimensions before commencing mass production.
Lubrication and Maintenance: Periodically check oil levels and change gear oil in the gearbox; regularly apply grease to universal couplings, bearings, and other components to ensure transmission system stability.
Wear Part Management: Periodically inspect or replace rolls, guide plates, and push rods based on wear; maintain an inventory of common spare parts to minimize downtime.
Shutdown and Cleaning: Clear away scale and debris after each shift; inspect roll surfaces for steel adhesion or cracks; maintain equipment operation records.
Safe Operation: Strictly prohibit approaching the roll area while the machine is running; implement lockout/tagout procedures during maintenance; display burn warnings near high-temperature components.
FAQ
Q: What is the typical service life of the rolls?
A: Taking an φ80mm steel ball as an example, a single roll can produce 700,000 to 1,000,000 balls; actual lifespan depends on material, rolling specifications, and operational practices. Rolls made of H13 material offer a longer service life than those made of 5CrNiMo.
Q: Are there high technical requirements for operators?
A: The Continuous Steel Grinding Ball Skew Rolling Mill features a high degree of automation; during normal production, only a small number of personnel are needed per shift to monitor temperature and current and to spot-check products. However, tasks such as roll changing and pass design adjustments require specialized training.
Q: Does the process require adjustment when rolling different materials on a continuous steel grinding ball skew rolling mill?
A: Yes. Heating temperatures and quenching/tempering parameters vary for materials such as 65Mn, B2, B3, and GCr15; we provide recommended process parameters tailored to the specific material.
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