Formula of inserting bottom roll

The utility model discloses a formula of inserting bottom roll belongs to the machine -building field, has solved the problem that bottom roll sword piece materials were not economized in the conventional art. Including bottom roll body, sword piece, the sword piece sets up bottom roll body outer lane, be equipped with sword piece groove on the bottom roll body, the sword piece passes through soket head cap screw locking and is in in the sword piece groove, the sword piece possesses two inclined planes, sword piece surface distribution has gas pocket first, bottom roll body side distributes and has gas pocket second, the figure of sword piece is two at least, closely laminates in the inclined plane of adjacent sword piece. The utility model discloses novel structure, the outer lane of bottom roll body is equipped with a plurality of sword pieces, and closely laminate in the inclined plane of adjacent sword piece, and bottom roll that the formula of inserting is connected can save material, required sword piece raw materials specification is normal, makes things convenient for the purchase of raw and other materials, can in time satisfy clients' requirement, affect using effect not when saving raw and other materials, bottom roll surface and side are equipped with the gas pocket, more are favorable to cutting off and transmitting of product.