Screw is the most common type of fixing device in daily life. Usually it is used for fastening. Of course, it is hoped that it will be tightened, but it also adds some trouble to the subsequent maintenance technicians. When the screw is severely rusted, it is difficult to use a wrench to screw it down. For this reason, the workers will use various methods such as knocking, dripping, burning, punching, welding, foaming, and the like.
â–²I have been rusted and unable to extricate myself.
First of all, let's talk to you about several commonly used methods:
Method one: knock
Severely rusted screws should not be hardened with a wrench to prevent them from slipping and cornering, twisting the screws or screwing the wrench. At this point, you can tap the handle of the wrench with a hammer, and the rusted screws will often loosen to unscrew.
Method two: drop
If the screw is not severely rusted, you can try to drip first. If you can't open it, you can drop a little oil or vegetable oil along the gap between the screw and the nut. With wire cutters and wrenches, you can easily unscrew it. (The oil does not work for rusted screws and will affect disassembly)
Method three: burn
Some screws are severely rusted and can be fire attacked. step:
(1) Fully grill the screws and nuts with a gas welding flame.
(2) Then apply oil or sewing machine oil to the red-hot screw.
(3) The screw is heated and expanded, and the rust between the screw and the nut is squeezed to increase the gap. After the oil drops, the screw shrinks rapidly and cools, and the gap between the screw and the nut is further increased. After the oil flows in, the screw can be unscrewed. Note that this method should be used with caution for screws with plastic parts nearby, and the screws that have been burned should not be reused.Method four: rush
Some of the tops of the screws are deformed by a word or cross, which cannot be removed with a screwdriver, a wrench or a wire cutter. The impact method can be used. step:
(1) First, use a hammer and a flat-blade screwdriver to impact a V-shaped groove on the vertical surface of the top of the screw;
(2) Then adjust the angle of the flat-blade screwdriver to impact in the direction in which the thread is unscrewed;
(3) After the screw is loosened, the screw can be screwed out with a wire cutter.Today, Xiaobian wants to recommend to everyone a very practical method - induction heating
This method is simple to operate and is suitable for the disassembly or installation of various metal parts, such as drive parts, bearings, housings, gears, bolts, nuts, pipe fittings and small parts. It is versatile and suitable for use in confined spaces. Moreover, the local heating can be accurately performed, so that the area outside the heated workpiece still retains the original temperature; and the heated workpiece is expanded and loosened, which is convenient for disassembly or installation. Especially for bolts and nuts, this is the most ideal solution.When bolts and nuts are stuck, the traditional method is nothing more than cutting or gun heating. However, whether it is cutting or gun heating, the resulting open flame or spark is likely to cause greater danger or damage to other parts, or local area pollution, and this inductive heating is not only faster, but also safer. And it will not cause any pollution.
Pyrite as Fillers Used in Grinding Wheels/ Abrasive Tools
Ablation grinding wheel / abrasive( filling agent )
PYRITE__As fillers used in grinding wheels/ abrasive tools
Place of Origin: Henan Luoyang, China
Pyrite, Iron pyrites, pyrites lump, Ferro sulphur, Pyrites powder.
Product Description
Detailed introduction: is filling agent for ablating grinding wheel abrasive, which can effectively reduce the grinding wheel temperature during ablation, improve the heat resistance, and prolong the service life of the grinding wheel.
Formation of a protective layer
(1)The reaction absorbing oxygen occurs between 400 and 475 degrees, thereby reducing the oxidation of resin, reducing the oxidation burn of workpieces, and prolonging the working life of grinding wheels at high temperature.
4 FeS2 + 11 O2→2 Fe2O3 + 8 SO2
(2) 4 FeS + 7 O2→4 Fe2O3 + 4 SO2
400-475 degrees is a limit that the grinding wheel can easily reach. The above reaction creates an oxygen-free and hypoxic environment for the grinding wheel at the micro level, thereby improving the high-temperature performance of the grinding wheel.
Decomposition reaction occurs at 650-degree heat absorption, thereby reducing the working temperature of the grinding wheels.
FeS2→FeS + S
(3) It enters the melting state at about 1100 degrees, which becomes a good lubricant to protect the grinding wheel FeS(s)→FeS(l).
(4)Sulfur, sulfur dioxide and sulfur trioxide react with the workpiece surface to form FexSy:
Quality:
S: 48%min, FE: 42%min, SIO2: 3.0%max, PB: 0.1%max,
ZN: 0.1%max, AS: 0.1%max, . C: 0.3%max, CU: 0.2%max,
H20: 1.0%max, SIZE: 95%min
Granularity: (0-3)mm/(3-8)mm/(3-15)mm/(15-50)mm or other particle size.
Packing: 25KG/500KG/1000KG/BAG or 1000KG/BAG or other packaging.
Note: if there are special requirements, the product can be customized according to clients` requirements.
Iron Sulphide For Resin Grinding Wheel---LHT(SL)
Iron sulphide for resin grinding wheel Pyrite, Iron pyrites, pyrites lump, Ferro sulphur, Pyrites powder
LUOYANG PERFECT TRADING CO.LTD, , https://www.pyritefes.com