BORUI CNC specializes in the production of CNC milling machines, universal milling machines, vertical milling machines, horizontal milling machines, and turret milling machines. is a manufacturer of manual milling machines with advanced production technology.

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Buying Guide for Manual Milling Machines for Metalworking

If you are in the metal processing industry, then the milling machine will be an indispensable machine for you, please read the content carefully, it will be very helpful to you.

What is a milling machine?

The milling machine consists of a fuselage and a table. The fuselage contains a spindle. It is a machine tool for cutting metal. The surface of the workpiece is milled with a milling cutter. The milling cutter processes planes, curved surfaces, grooves and gears by rotating motion. Move up, down, left and right. During operation, the tool rotates and the workpiece moves in contact with the tool. Milling machines can process more complex profiles and have high work efficiency. They are mostly used in machinery manufacturing, repair departments and mold manufacturing. At present, milling machines are widely used and can process various parts, which is convenient and labor-saving.

How does a milling machine work?

After the milling machine is fixed, install the workpiece on the worktable or the attachment of the indexing head. The spindle motor rotates and is transmitted to the main shaft and the worktable by the gearbox. When the milling cutter installed on the main shaft rotates, the worktable or the milling head advances. Given the movement, the milling cutter cuts the surface of the workpiece. The milling cutter on the spindle can be turned at various angles. When processing different workpieces, different tools are used, and the speed needs to be adjusted at any time for cutting. The milling machine has three directions of adjustment and movement of X, Y and Z axes, which can adapt to the shape and size of various components. According to different processing requirements, it can use any one of the three directions to feed.

How many types of milling machines are there?

According to the main axis of the milling machine, the milling machine can be divided into two categories: manual vertical milling machine and  manual horizontal milling machine. Due to the wide variety of milling machines, we divide milling machines into CNC milling machines and ordinary milling machines.

Common vertical milling machines usually include: turret milling machines and universal milling machines.
Universal milling and turret milling belong to the same series of milling machines. They have powerful processing capabilities and can perform high-speed and heavy-load cutting work at the same time. They have the advantages of simple structure and flexible operation.

The difference:

1. The processing range is different
The turret milling machine can process planes, inclined planes at any angle, milling keyways, grooves, and can also rotate, ream, and bore holes. The spindle has a large speed change range and a high speed.
Universal milling machine is suitable for milling planes, bevels, grooves, etc. with various rod milling cutters, circular milling cutters, and angle milling cutters. If the universal milling head, circular table, indexing head and other milling machine accessories are used, the processing range of the machine tool can be expanded, and it is suitable for heavy and large-scale machining such as mold special steel processing, mining equipment, and industrial equipment.

2, the structure is different
The universal milling table has a rotary mechanism, and the table can be rotated ±45°, which can increase the processing range and
Processing methods.
The turret milling table cannot be rotated, the end milling head can only move up and down the Z axis, and the processing method is single;

3. The transmission mode is inconsistent
When adjusting the speed of turret milling, it is not only necessary to adjust the gear, but when the gear is set, when the speed is adjusted, it is necessary to manually adjust the pulley for adjustment, which is relatively troublesome.
The universal milling spindle is driven by gears and has a large output power. When adjusting the gear, it is necessary to adjust the speed change plate and the operating lever.

4. Inconsistent structural strength and types of processed parts
The structure of the universal milling machine is relatively strong, and the bearing capacity is large; some turntables are added on the basis of the overall casting structure, and the self-weight is also large; the output of the milling head adopts a Mo-type structure, generally 7:24, and the output power is large. At the same time, due to its high output power, the universal rocker milling machine can process ferrous metals such as stainless steel, cast iron, and cast steel in addition to aluminum and copper parts.
The output of the turret milling machine adopts the taper shank output, which is generally divided into 3, 4, and 5 turret milling machines, which have limited bearing capacity and light weight. Therefore, turret milling can only process aluminum and copper parts with less cutting force.

What can a milling machine do?

Milling machines are widely used and have powerful processing capabilities. The corresponding processing parameters are selected according to different parameters, precision and surface roughness of the workpiece. The milling machine can not only process planes, curved surfaces, grooves, gear parts, and various threaded helical surfaces , you can also drill holes for the workpiece through point control. The milling machine has a fixed cycle processing, which can simplify the processing program and reduce the workload of workers. It is a molding equipment used to engrave metal workpieces.

How to use a milling machine? ——Notes on milling machine operation:

1. Before working, check whether the handle of each part is flexible and normal, and whether the fastening screws of each part are loose. If there is any abnormal phenomenon, the work cannot be carried out, and the relevant personnel should be repaired immediately before starting work.
2. Check whether each lubricating surface is clean, and add oil to each lubricating surface and each oil filling hole to keep the lubrication normal.
3. Start the machine tool spindle to idle for 1 to 2 minutes, pay attention to check whether the machine tool has abnormal noise and whether the protective device is reliable.
4. Pay attention to the rotation of the motor shaft and check whether the temperature is normal.
5. It is not allowed to wear gloves or use rags to remove iron filings when the machine tool is running. When checking the size of the parts, it is necessary to stop. When clamping parts, changing speeds or leaving the machine, stop and turn off the power.
6. When clamping parts, the worktable must be withdrawn to a safe position away from the milling cutter.
7. The cutting amount should be appropriately selected according to the material of the workpiece to be clamped, the spindle speed of the machine tool, and the tooth profile of the milling cutter.
9. After the work, clean the machine tool, clean the sanitation around the machine tool, add lubricating oil, cut off the power supply of the machine tool, and place the processed parts neatly.

Trouble you may encounter when using a milling machine ——Troubleshooting methods for milling machines:

1. If the motor does not rotate, check whether the wiring is correct and whether the power supply is energized.
2. The radial runout of the main shaft is large, abnormal sound occurs, and there is heat generation. Check whether the main shaft is loose, and adjust the locking nut on the main shaft assembly to achieve proper tightness.
3. The whole machine shakes, check whether the motor seat plate and the supporting rod lock nut, whether the screw is loose, whether the machine head and the support are clamped on the column, and adjust each locking part to achieve a firm clamping.
4. The main shaft is blocked and does not reset. Check whether there is iron debris at the joint between the main shaft sleeve and the gear shaft, and whether the spring is fatigued and relaxed. Clean up the iron debris, apply oil, and tighten the spring to a suitable level.
5. The lifting slide is unbalanced, there is abnormal noise, and the worktable moves not smoothly. Check whether there are iron filings at the fitting of the bevel gear, whether the inclined iron is loose, clean the iron filings, fill with oil, and adjust the inclined iron to a suitable tightness.
6. The gear box has an abnormal response and stops to check whether the speed change is in place and whether it is short of oil.