What are the precise machining tips you need to know?
the process of production and processing of the machinery industry,
although there are some details that are insignificant, if we can learn
from it, we can use it in turn, use our brains and try our best to help
our work. The following Kingship summarizes several tips for you to refer to.
1: Remove the jaws of the vise, process two threaded holes for two M4s,
attach two steel plates with a 1.5 mm thickness to the jaws, and rivet a
0.8 mm thick hard brass plate with aluminum blind rivets. 3 Fasten it to the jaws with M4 countersunk screws 1 to form a durable soft jaw. This also protects hardware components from being pinched and is interchangeable.
2: The use of magnets to absorb small parts (fees) is not easy to
absorb and take, can suck an iron plate 2 under the magnet 1, not only
can suck a lot of small pieces, but also pull the iron plate, the small
pieces will automatically Pour into the collection box is not enough to move the heart, but it is practical.
Tip three: pulley drive, the pulley and the skid often between the
skidding on the axle with ¢ 15 ~ 18mm Zoned nest drill a series of nest,
so that the formation of adsorption, to prevent slipping, turning waste
into treasure, the boss will reward.
Tip 4: When the Allen wrench 1 handle is short and cannot work, insert
a wrench with a slightly larger diameter than the wrench from a milling
slot into the slot, which can be used as a long handle.
5: As for the tightening of the workpiece, it is the first position and
then the clamping, but for a workpiece, the first clamping and
repositioning, because the clamping will certainly try to deform the
workpiece, so it should be clamped and repositioned, for 6 points Positioning, find limit its degree of freedom.
tips and knocking are mostly found in the normal work of the staff,
these tips, on the surface does not really represent anything, but when
you use more, it can bring a lot of benefits for companies including
themselves. I hope everyone in the future to find more of these tips and tricks.
What are the commonly used precision machining materials? How to choose?
general, precision machining of materials commonly used in two
categories: metal processing; non-metallic materials processing (such as
ceramics, plastics, etc.); hardness descending: stainless steel>
cast iron> copper> aluminum, said several commonly used Right, I hope it works for everyone.
1,45 - high-quality carbon structural steel, is the most commonly used carbon quenched and tempered steel.
features: The most commonly used carbon quenched and tempered steel,
good mechanical properties, low hardenability, easy to crack when water
quenching. Small parts should be quenched and tempered, large parts should be normalized.
Application examples: It is mainly used to make high-strength moving parts such as turbine impeller and compressor piston. Shafts, gears, rack, worm and so on. Welding attention to preheating before welding, stress relief annealing after welding.
2, Q235A (A3 steel) - the most commonly used carbon structural steel.
Main features: High plasticity, toughness and weldability, cold
stamping properties, as well as a certain strength, good cold bending
Application examples: Widely used for the general requirements of the parts and welding structure. Such as the less force rod, connecting rod, pin, shaft, screws, nuts,
ferrules, brackets, base, building structures, bridges and so on.
3,40 Cr - one of the most widely used steel grades, is alloy structural steel.
features: After quenched and tempered, it has good comprehensive
mechanical properties, low temperature impact toughness and low notch
sensitivity, good hardenability, high fatigue strength when oil-cooled,
and easy-to-shape parts with water cooling Cracks,
cold plasticity moderate, tempered or quenched and tempered and
machinability is good, but the weldability is not good, easy to crack,
preheat before welding should be 100 ~ 150 ℃, generally used in the
quenched and tempered state, but also Carbonitriding and high-frequency surface hardening.
example: quenched and tempered for the manufacture of medium-speed,
medium-loaded parts, such as machine gears, shafts, worms, spline
shafts, thimble sets, quenched and tempered and used for the manufacture
of high surface hardness, resistance Grinding
parts such as gears, shafts, spindles, crankshafts, spindles, sleeves,
pins, connecting rods, screw nuts, intake valves, etc. are used for
heavy and medium speed impact after quenching and tempering Parts
such as oil pump rotors, sliders, gears, spindles, collars, etc., are
hardened and tempered for the manufacture of heavy duty, low impact,
wear resistant parts such as worms, spindles, shafts, Nitrogen osmosis then create larger size, high temperature impact
toughness of the transmission parts, such as shafts, gears and so on.
4, HT150 - gray cast iron
Application examples: gear box, machine bed, box, hydraulic cylinder,
pump body, valve body, flywheel, cylinder head, pulley, bearing cap,
5,35 - a variety of standard parts, fasteners commonly used materials
Main features: appropriate strength, good plasticity, high cold plasticity, weldability is acceptable. Cold upsetting and drawing can be localized. Hardenability is low, normalized or tempered before use
Application examples: suitable for the manufacture of small section
parts, can withstand greater load of the parts: such as crankshaft,
lever, connecting rod, hook and so on, all kinds of standard parts,
6,65Mn - commonly used spring steel
Application examples: small size of various flat, round spring,
cushion spring, spring winding, spring ring can also be made, gas
spring, clutch reed, brake spring, cold coil spring, circlip and so on.
7,0Cr18Ni9 - the most commonly used stainless steel (US steel 304, Japanese steel SUS304)
Features and applications: As the most widely used stainless steel
heat-resistant, such as food equipment, general chemical equipment,
originally in the industrial equipment
8, Cr12 - commonly used cold work die steel (the United States Steel D3, the Japanese steel SKD1)
and Applications: Cr12 steel is a widely used cold-work die steel,
which is a high-carbon, high-chromium type of martensitic steel. The steel has good hardenability and good wear resistance; as Cr12
steel carbon content of up to 2.3%, so the impact toughness is poor,
easy to brittle fracture, and easy to form uneven eutectic carbide;
steel due to good wear resistance, used in the manufacture of less
impact load by the requirements of high wear-resistant die, punch,
blanking die, cold heading die, cold extrusion die punch and die, drill Sets, gauges, wire drawing die, stamping die, rolling plate, drawing die and powder metallurgy with cold die.
9, DC53 - commonly used in Japan imported cold work die steel
and Applications: High strength and toughness cold work die steel,
Japan Datong special steel (strain) manufacturers steel. After high temperature tempering with high hardness, high toughness, good line cutting. 9 for precision cold stamping die, drawing die, rolling wire die, cold punching die, punch and so on
10, SM45 - Ordinary carbon plastic mold steel (Japanese steel S45C)