The method of removing the outer cone of the drive wheel tank
(57) Abstract:The invention relates to the field of repair of armored vehicles and armament in the field of military repair services. The method reduces the time and effort, save material resources. The inventive before vipresume with three wypracowania bolts outer cone side due to the efforts of the pressure of the ice. To do this, in the cavity formed by wrapped in the shaft side of the transmission tube and a cover with rubber seal, bogatoi to the outer cone of the three mounting bolts through the filling tube is filled with water. Then freeze the water by feeding liquid nitrogen from a cylinder. 1 Il. The invention relates to the field of repair of armored vehicles and armament in the field of military repair authorities.The most loaded element chassis tanks is a leading wheel, transmitting torque from the transmission to the tracked mover. When interacting with caterpillar wear crowns wheels. During maintenance N 1 and 2, when the production of tanks for storage and after fording provides Chi graphite grease, sealing the outer cone putty LPC.Due to lack of maintenance materials, poor funding maintenance is delayed. Due to corrosion the most time-consuming operation when removing the drive wheel is supressive outer cone.There is a method of removing a cone drive wheel of the tank (See. Instructions for use single sets of universal fixtures and special keys with military repair of armored vehicles and armament. - M.: Voenizdat, 1985. C. 64 - prototype).He is loosening the tube drive wheel, ipressive outer cone with three wypracowania bolts and wedges which are driven into the slot of the cone.When you try to compress thus the cone is often twisted body wypracowania bolts flush with the surface of the cone, which significantly complicates the work. To reduce the duration of the removal of the drive wheel when ipressive cone use two sledge hammers to impact on the hub of the drive wheel. If the cone is not vypressovyvaetsya, then tear the leading wheel of the rope together with the cone using a different tank, and remonter is orogovenia cut the hub of the drive wheel with the cone, there is a risk of damaging the shaft side of the transmission.Thus, the existing method of removing the outer cone of the drive wheel tank unreliable, uneconomical, as it requires in the event of disruption wypracowania bolts raise additional funds.The task of the invention is to increase the capacity of repair organs, reducing the time and labor saving of material resources when ipressive outer cone of the leading wheels of the tank.The invention is illustrated in the drawing, where
1 - drive wheel; 2 - cone; 3 - wypracowanie bolts 175.95.118; 4 - water (ice); 5 - gas tube; 6 - shaft side gear; 7 - tube turnkey; 8 - cover; 9 - rubber seal; 10 - bolts; 11 - a container with liquid nitrogen.This task is achieved by the fact that the tube turns the drive wheel 1, the outer cone 2 vypressovyvaetsya with three wypracowania bolts 3 and additionally due to the efforts of 4 ice formed by the freezing of water 4 poured through the tube 5 into the cavity formed by wrapped in the shaft side of the transmission 6 tube under the key 7 and the cover 8 with a rubber seal 9, bogatoi to cone three mounting boltenia cover l depends on the distance 1 between the lid and the tube under the key the ratio of the densities of waterinand icel: l = l(in/l-1).
As a rule, it is enough to move the cone and its subsequent removal is wypracowanie bolts.When implementing the inventive method expands the possibilities of repair bodies repair of chassis tanks in the field, decreasing the duration and complexity of removing the drive wheel, reduces the cost of repairs.The technical result of this method is fade in efforts of removing first due to freezing water, then use wypracowania bolts, it also increases the reliability of the removal of the cone and is not damaged part of the drive wheel. The method of removing the outer cone of the leading wheels of the tank, including the loosening of the tube drive wheel, vipresume outer cone with three wypracowania bolts, characterized in that the original side of the cone due to the efforts of the pressure of the ice formed by the freezing of water, which is poured through the filling tube into the cavity formed by wrapped in the shaft side of the transmission tube and a cover with rubber seal, bogatoi to cone three credit
FIELD: machine engineering, possibly manufacture of sealing envelopes of corrosion resistant steels of metal-plastic high-pressure bottles.
SUBSTANCE: method comprises steps of separately making metallic convex bottoms with cylindrical collar and backing ring. Thermal expansion factor of backing ring exceeds that of bottoms; outer diameter of backing ring provides close fit of bottoms onto it at 20°C; cooling preliminarily assembled backing ring with bottoms until cryogenic temperature; sliding bottoms on backing ring in cooled state until mutual touch of cylindrical collars of bottoms; heating assembly up to 20°C in order to provide close fit of backing ring in cylindrical collars of bottoms; welding bottoms along butt of assembly and then removing backing ring by chemical milling.
EFFECT: simplified process of making envelopes with enhanced mass characteristics.
2 cl, 4 dwg, 1 ex
FIELD: machine engineering, namely equipment for dismounting press-fit joints, possibly restoration of electric machines.
SUBSTANCE: apparatus includes housing with platforms for horizontal and vertical motions. Part to be dismounted is placed on horizontal motion platform and it is fed to stripping mechanism. The last is joined with vertical motion platform by means of fastening members and it is provided with adjusted grips supporting heating members with possibility of their axial movement. Heating members are in the form of nozzles for alternating feed of hot and cooled air.
EFFECT: reduced axial errors between dismounted part and stripping mechanism, lowered efforts for stripping parts.
5 cl, 5 dwg
FIELD: machine engineering, possibly restoration of articles operating at large cyclical loads and high temperature values.
SUBSTANCE: method comprises steps of cooling male part in liquefied nitrogen and introducing it into female part. Male part is made of refractory nickel alloy similar to that of female part. After equalizing temperature of assembly, it is heated till recrystallization temperature and subjected to isothermic soaking. It causes creation of structural and phase conversions in assembled parts.
EFFECT: improved quality of joints of parts.
1 ex, 1 tbl
FIELD: mechanical engineering.
SUBSTANCE: invention can be used in shaft-bushing interference. According to invention, shaft and bushing are made of material with similar physical and mechanical properties with projections in form of laser hardened paths. Pitch of parts is twice as great as their width. Paths are arranged at angle of 0-90° to axis of joint. Opposite paths of shaft and bushing are displaced relative to each other by width of part. In particular cases, paths can be arranged along ring lines lying in planes square to axis of joint, in starting lines parallel to axis of joint, or helical lines.
EFFECT: increased load-carrying capacity of joint.
4 cl, 4 dwg
FIELD: measuring technique.
SUBSTANCE: device comprises flexible measuring member mounted concentrically with respect to the bearing race and having strain gauges covered with casing and set on its surface. The device also has split bushing with conical outer side mounted for permitting cooperation of the inner side of the flexible member with the outer side of the bearing race to be tested. The flexible member is sectional and composed of two step thick-walled races provided with strain gauges, mounted on the bushing, and interconnected by means of a thread joint. The bushing has ring cylindrical recess centered in its outer surface. The inner surfaces of the smaller steps of the thick-walled races are conical, with cone bases arranged from the side of the large steps.
EFFECT: enhanced convenience of testing and reduced metal consumption.
FIELD: plastic working of metals, namely processes for forming butt welded seams on tubes at making tube studs of U-shaped tube bundles using effect of localized hot plastic deforming of welded seam and near-seam zones.
SUBSTANCE: method comprises steps of preliminarily working tube ends by expanding them from cylinder to cylinder; assembling tubes with use of mandrel and placing intermediate member of additive material between joined end surfaces of end portions of tubes sized by expansion and end surfaces of step ring. Welded seams are formed by argon-arc welding due to melting material of intermediate member at its both sides adjacent to tube ends. The intermediate member is heated up and it is subjected to hot radial squeezing while concentrating its initial deformation in surface layers according to position of ring steps, welded seams and near-seam zones on mandrel for providing size of their outer diameter equal to initial outer diameter of tubes.
EFFECT: improved quality of welded seams.
FIELD: railway transport; repair of rolling stock.
SUBSTANCE: invention relates to repair of load-bearing parts of vehicles, particularly, to repair of overspring beams of car bogies with inserts press-fitted into step bearings. According to proposed method, step bearing of overspring beam is heated, together with insert, to temperature exceeding 250°C. Inner surfaces of insert are cooled by blowing at velocity 1.1 times higher than velocity of heat exchange through surfaces in contact with step bearing to eliminate negative allowance between insert and outer bead of step bearing. To extract insert, it is expanded from inside by applying force. Device for implementing the method has body in form of disk to be arranged in step bearing with slots on side surface in which bellcranks 9 are fitted being driven by pneumatic cylinder, with claws for gripping the insert, central hole through which rod 16 of pneumatic cylinder passes to extract insert 40, with inner space designed for distribution of cooling compressed air among nozzles pointed to surfaces of insert.
EFFECT: increased efficiency when repair overspring beams, reduced energy consumption and labor input in process of repair.
3 cl, 4 dwg
FIELD: processes and apparatuses for assembling parts at tightness, possibly production and restoration of sleeves of sealing unit of turbo-compressor.
SUBSTANCE: method comprises steps of placing sleeve into embracing part at technological tightness; performing electric-contact heating of inner surface of sleeve and then deforming it by drifting for creating mounting tightness of sleeve and embracing part joint; smoothing roughness of inner surface of sleeve. Electric-contact heating and drifting of inner surface of sleeve are realized with use of duplex tool in the form of contact- heating tool and arranged behind it deforming- calibrating tool. Contact-heating tool provides heating of inner surface of sleeve in annular zone of contact with said contact-heating tool. Deforming- calibrating tool is mounted at tightness equal to 0.8 mm. In the result during one operation sleeve is pressed-in to embracing part, roughness of inner surface of sleeve is smoothed and inner surface of sleeve is strengthened at hardness 48 - 54 HRC3.
EFFECT: enhanced efficiency of assembling parts.
FIELD: machine building.
SUBSTANCE: invention is related to machine building and instrument making, and may be used in performance of machine assembly works. Method for interference fit of parts by means of press fitting with application of material that strengthens the joint includes partial press fitting of parts with measurement of press fitting force and their further additional press fitting. According to method partial press fitting of parts is carried out. Then material that strengthens joint is applied on free sections of joined surfaces of one or both parts. After that their further additional press fitting is realised.
EFFECT: simplification of assembly process and reduction of costs for joint strengthening.
FIELD: process engineering.
SUBSTANCE: external part inner surface is furnished with 2 to 5 mm-pitch teeth. Assembly is carried out to make a clearance between external and internal parts. Internal part is subjected to upsetting.
EFFECT: higher quality and strength of joint, simplified assembly.
4 dwg, 1 ex