How to demagnetize a large number of shaft parts with a diameter of about 20mm

Hongxu flaw detector technician to help you answer: Yes.

AC demagnetization should be used: it has the characteristics of no contact with the workpiece, no damage, high efficiency, good demagnetization effect, and small residual magnetism. It is suitable for demagnetizing various metal materials (non-magnetic materials) in large quantities, so that the originally magnetic metal materials lose their magnetism.

In general, there are two methods.

For the batch demagnetization of small and medium-sized workpieces, it is best to demagnetize the workpiece on a demagnetizing machine equipped with a track and a carriage, when demagnetizing, put the workpiece on the carriage and place it at 30cm in front of the coil, when the coil is energized, the workpiece is slowly passed from the coil along the track and is at least 1m away from the coil and the power is cut off.

For heavy or large workpieces that cannot be demagnetized on a demagnetizing machine, the coil can also be put on the workpiece, and the coil can be slowly passed through and away from the workpiece when the power is on, and the power is cut off at least 1m away.

Attenuation method Due to the continuous commutation of the direction of alternating current, the automatic attenuation demagnetizer can be used to gradually reduce the current to zero for demagnetization, such as putting the workpiece in the first circle without moving, and the current in the coil is gradually attenuated by the attenuation circuit to achieve the purpose of demagnetization.

A large number of shaft parts with a diameter of about 20mm can be degaussed by large-scale alternating magnetic field attenuation and demagnetization

1. Make a round drum with 5 10mm plastic plates as needed;

2. Use enameled wire to wrap about 4000 circles around the barrel on it, fix the terminals with terminals, and use mica and insulating fiberglass tape to insulate the coil and then dip it in paint and dry;

3. Purchase a stepless voltage regulator of about 5kw, the output end is reliably connected with both ends of the coil, and the input terminal is connected to the power switch;

4. Put the parts into a plastic bucket, turn on the power switch, adjust the voltage to 220V, power on for about three to five minutes, and slowly adjust the voltage from 220V to 0V for about 2 minutes.

To sum up, a large number of shaft parts with a diameter of about 20mm can be degaussed by large-scale alternating magnetic field attenuation and demagnetization, according to the above method.

Most of the processing methods of shaft parts and disc parts are turning, while the set of parts are generally boring, and the cutting of complex surfaces is mainly used for copy milling and CNC milling or special processing methods.

a) The processing route of the outer surface.

1 Coarse Semi-Finish Semi-Finish Finishing:

It is the most widely used, meets IT IT7, and the outer circle can be processed.

2 rough turning, semi-fine turning, rough grinding, fine grinding:

It is used for ferrous metals with quenching requirements IT IT6.

3 rough turning, semi-finishing turning, fine turning, diamond turning:

It is used for non-ferrous metals and should not be ground for external surfaces.

4 Rough Turning, Semi-Fine Turning, Rough Grinding, Fine Grinding, Grinding, Superfinishing, Belt Grinding, Mirror Grinding, or Polishing Further Finishing on the basis of 2.

The aim is to reduce roughness and improve dimensional accuracy, shape and position accuracy.

2) The processing route of the hole.

1 drill rough drawn fine draw:

It is used for the processing of internal holes, single key holes and spline holes for mass production of disc sleeve parts, with stable processing quality and high production efficiency.

2 Drill expansion hinge Hand hinge:

It is used for small and medium-sized hole machining, correcting the position accuracy before reaming, and reaming to ensure the size, shape accuracy and surface roughness.

3 Drill or rough boring, semi-fine boring, fine boring, floating boring or diamond boring.

Application: 1) Box pore processing in single-piece low-volume production.

2) Hole system processing with high position accuracy requirements.

3) The diameter of the hole is relatively large and more than 80mm, and there are casting holes or forging holes on the blank.

4) Non-ferrous metals have diamond boring to ensure their size, shape and position accuracy and surface roughness requirements.

4. Drill (rough boring), rough grinding, semi-fine grinding, fine grinding, grinding or grinding.

Application: Hardened parts machining or drilling with high precision requirements.

Note: 1) The final machining accuracy of the hole depends largely on the level of the operator.

2) Special processing methods are used for extra-small hole processing.

3) Flat processing route.

1 rough milling, semi-fine milling, fine milling, high-speed milling.

It is commonly used in plane processing, and the process is flexibly arranged according to the technical requirements of the accuracy and surface roughness of the machined surface.

2 Coarse planing, semi-fine planing, fine planing, wide knife fine planing, scraping or grinding.

It has a wide range of applications and low productivity, and is often used for the processing of narrow and long surfaces, and the final process arrangement also depends on the technical requirements of the machined surface.

3 Milling (planing) Semi-finishing milling (planing) Coarse grinding Fine grinding Grinding, precision grinding, belt grinding, polishing.

The machining surface is quenched, and the final process depends on the technical requirements of the machined surface.

4 Pull Pull Jingla.

Mass production with grooved or stepped surfaces.

5 cars, semi-finishes, diamond cars.

Flat machining of non-ferrous metal parts.

The question is not in detail, I will tell you about the processing technology of the shaft I often process, the shaft of mass production, the technical requirements, the quenching and tempering treatment 250-280, the surface induction hardening 52-56, the process: 1 blanking.

2. Quenching and tempering treatment.

3. Punch the center hole on the end face of the car.

4. The processing amount of the outer circle of the rough turning 55, that is, the size of the rough turning to the angle of 30 degrees inverted, the length of the other end of the 5 car is in place.

6 car step surface chamfering, drilling 30 inner holes, 30 inner holes, flat holes, 7 drilling machines, drilling depths 130 holes.

8. Reaming hole expanded to 9 (it may be that the manufacturer's drawings are wrong, the bottom hole of M10*1 is 9, and the bottom hole of M10 is the power wire.)

9 drill 4-6 hole chamfer 1

0. Milling machine with saw blade cutter sawing 34 wide oil groove 11 surface high-frequency quenching 11 grinding processing grinding to size.

12. Surface anti-rust treatment, packaging.

The processing process of Fei Juan is mainly due to the maturity and perfection of a processed product.

1. Part drawing analysis; 2. Determine the blank; 3. Determine the processing method of the main surface; 4. Determine the positioning datum; 5 Phases; 6. Arrangement of heat treatment process; 7. Machining size and cutting amount; 8. Proposed process; 9. Transmission shaft machining process process diagram. Based on the above analysis, the process route of the transmission shaft is as follows:

Blanking, both end faces of the car, drilling the center hole, rough turning of each outer circle, quenching and tempering, repairing the center hole, semi-finishing of the outer circle, turning groove, chamfering, turning thread, marking keyway processing line, milling keyway, repairing and researching center hole, grinding, inspection.

The outer circle is processed first, and then in the processing groove.

Do you want to write craft or programming?

45 steel, diameter 25mm, length 150mm, heat treatment process: quenched and tempered HRC23--28

Heating equipment: box-type resistance furnace with a power of 60 kilowatts.

Furnace capacity: 300kg (you can convert the number of workpieces yourself) The temperature of the empty furnace is raised to 840 degrees -- the parts are fed into the furnace (bulk) -- the temperature is 840 degrees plus or minus 10 degrees -- the heat preservation hour -- the furnace is released -- the cooling method: water cooling to room temperature -- the basket is loaded into the 36 kilowatt pit tempering furnace -- the temperature is raised to 560 degrees plus or minus 10 degrees -- the heat is kept warm for 2 hours -- the hardness of the first piece is checked HRC23 -- 28 -- the furnace is air-cooled.

It is very simple to express it in terms of heat treatment curves. It's not convenient to draw here.

The other three are three different materials that you can choose yourself, such as 40cr heating temperature 860 degrees oil cooling.

Flip through the manual.

Shaft parts are generally made of medium carbon steel or alloy quenched and tempered steel. than zhi such as 45 steel 40cr steel.

Dimensional DAO and heat treatment process.

The internal needs are designed and formulated according to the mechanical properties required to be achieved.

The amount of furnace loading should be determined according to the model bearing capacity of the heat treatment furnace.

There are a wide range of shaft parts, so it is decided on a case-by-case basis.

There was a bottle of imported medicine with the words "Daily Va."

dzsfsdf