Abstract: An apparatus and method for spiral polishing with electromagnetic abrasive has adopted the principle of electromagnetic and magnetic abrasive along with a lead screw to polish the inner or outer surface of a precise screw or a complicated part. The apparatus includes a clamp, a lead screw, a first electromagnet, and a second electromagnet assembled in an airtight space, wherein the airtight space is filled with magnetic abrasive which is driven by the rotation of the lead screw and the electromagnetic function to polish a processed part in a regular shape or in an irregular shape.

Abstract: An apparatus and method for spiral polishing with electromagnetic abrasive has adopted the principle of electromagnetic and magnetic abrasive along with a lead screw to polish the inner or outer surface of a precise screw or a complicated part. The apparatus includes a clamp, a lead screw, a first electromagnet, and a second electromagnet assembled in an airtight space, wherein the airtight space is filled with magnetic abrasive which is driven by the rotation of the lead screw and the electromagnetic function to polish a processed part in a regular shape or in an irregular shape.

Abstract: An apparatus and method for spiral polishing with electromagnetic abrasive has adopted the principle of electromagnetic and magnetic abrasive along with a lead screw to polish the inner or outer surface of a precise screw or a complicated part. The apparatus includes a clamp, a lead screw, a first electromagnet, and a second electromagnet assembled in an airtight space, wherein the airtight space is filled with magnetic abrasive which is driven by the rotation of the lead screw and the electromagnetic function to polish a processed part in a regular shape or in an irregular shape.

Abstract: An apparatus and method for spiral polishing with electromagnetic abrasive has adopted the principle of electromagnetic and magnetic abrasive along with a lead screw to polish the inner or outer surface of a precise screw or a complicated part. The apparatus includes a clamp, a lead screw, a first electromagnet, and a second electromagnet assembled in an airtight space, wherein the airtight space is filled with magnetic abrasive which is driven by the rotation of the lead screw and the electromagnetic function to polish a processed part in a regular shape or in an irregular shape.

Abstract: A cartridge assembly for military and police training meets the requirement of practicing vividly while causing no harm. The assembly mainly has a projectile, a sabot, a C-type ring, and a cartridge case, wherein the projectile is disposed in a recess of the sabot; the sabot is fitted tightly into the case and the C-type ring is disposed in a slot at the bottom of the sabot. Upon a primer being struck to ignite the powder, the expanding gas partially outbursts and bleeds through an orifice to propel the projectile while the other part of the energy is applied to eject the cartridge case. As the cartridge case is pulled back, the elasticity of the C-type ring results in engagement of the sabot and the cartridge case, so as to achieve the aim of the ballistic cycle of the ammunition.

Abstract: This invention provides a cartridge assembly for military and police training to meet the requirement of practicing vividly while making no harm. The assembly mainly comprises a projectile, a sabot, a C-type ring, and a cartridge case, wherein the projectile is disposed in the recess of the sabot; the sabot is fitted tightly into the case and the C-type ring is disposed in the slot at the bottom of the sabot. Upon a primer being struck to ignite powder, the expanding gas partially outbursts and bleed through an orifice to propel a projectile and the other part of energy is applied to eject the cartridge case. As the cartridge case being pulled back, the elasticity of the C-type ring results into the engagement of the sabot and the cartridge case, so as to achieve the aim of the ballistic cycle of the ammunition.