The turning tool and processing method of a kind of thin-walled cylindrical workpiece
Technical field
The invention belongs to field of machining, there is provided for a kind of turning tool of thin-walled cylindrical workpiece and turnery processing side
Method.
Background technology
With the development of equipment manufacturing industry and the lifting of working ability, thin-walled parts are increasingly applied to each Ministry of Industry
Door.Application of the thin wall cylinder-shaped workpiece in equipment increases increasingly, once the workpiece damage, it is difficult to pass through turning in a short time
Method process, the turning of thin-wall workpiece deformation is always to perplex the problem of turnery processing.Thin wall cylinder-shaped workpiece turning
When the reason for being deformed have clamping force, Cutting Force, turning heat, position error and an elastic deformation, wherein it is maximum to influence deformation
It is clamping force and Cutting Force.
The content of the invention
Present invention solves the technical problem that it is:By designing and producing suitable frock and processing technology, effectively reduce and clamp
The influence that power, Cutting Force, turning heat, position error and elastic deformation deform to thin-wall workpiece turning, solves thin wall cylinder-shaped work
Part turning deforms problem.
The present invention adopts the technical scheme that:
A kind of turning tool of thin-walled cylindrical workpiece, including both ends are with externally threaded step mandrel, non-porous plug, plug with holes
And nut.Mandrel is passed through into inner hole of workpiece, non-porous plug and plug with holes are installed respectively at mandrel both ends, screw mandrel both ends
Nut, mandrel and workpiece are combined into one;Formed by the casting hole on plug with holes to mandrel, workpiece and both ends plug
Paraffin is injected in cavity.
Further, the non-porous plug and plug with holes are band rib tubular axle sleeve structure, for ease of dismounting, two plugs
Inner surface and mandrel both ends step small―gap suture interference fits, outer surface and the inner hole of workpiece small―gap suture transition of two plugs are matched somebody with somebody
Close, to ensure the axiality of workpiece and mandrel.
Further, the centre hole of positioning is machined with the both ends end face center of the mandrel, during ensureing outer surface processing
It is accurately positioned.
Using the thin-walled cylindrical workpiece processing method of above-mentioned turning tool, its step includes:
1)Rough turned piece is cylindrical, endoporus and end face, each 2~3mm of made allowance;
2)Smart car inner hole of workpiece and end face, length meet drawing size, 0.3~0.5mm of endoporus made allowance;
3)Smart car inner hole of workpiece is to drawing requirement;
4)Make above-mentioned turning tool, frock and workpiece are combined;
5)Mandrel both ends thimble location and installation;
6)Use coolant, smart car excircle of workpiece to drawing requirement.
The technological progress that the present invention obtains is:Turning tool is simple in construction, easy to operate, it is therefore prevented that clamping force, elasticity become
Machining deformation caused by shape, position error, coordinate small Lathe quantity and coolant, solve the change of turning thin-wall cylindrical workpiece
Shape problem, and ensure that the machining accuracy of thin wall cylinder-shaped workpiece.
Brief description of the drawings
Fig. 1 is embodiment product structure schematic diagram;
Fig. 2 is embodiment product and tool structure schematic diagram;
Wherein:The non-porous plugs of 1-, 2- paraffin, 3- workpiece, 4- mandrels, 5- plugs with holes, 6- nuts, 7- castings hole, 8- steps, 9-
Center hole.
Embodiment
Fig. 1 is the present embodiment product structure schematic diagram, it can be seen that the long 400mm of thin_wall cylinder part, both ends
The long wall thickness 2.5mm of 50mm, the middle nearly long wall thickness of 300mm only have 1mm.The workpiece of of this sort structure is more if produced in enormous quantities
Using wall thickness 1mm steel pipe both ends upsetting process production.But for the processing factory of no upset equipment, separate room production is upset
Processing cost is very high, and conventional method for turning can not be realized.
To realize that the single-piece work of thin_wall cylinder part produces, the invention provides a kind of simple turning tool, such as Fig. 2 institutes
Show, be the present embodiment thin_wall cylinder part product and its tool structure schematic diagram.Both ends are carried into externally threaded step mandrel 4
Passed through from the endoporus of workpiece 3, non-porous plug 1 and plug with holes 5 are installed in both ends respectively, and two plugs are band rib sleeve shaft noose
Structure, the inner surface of two plugs and the small―gap suture interference fits of step 8 at the both ends of mandrel 4, the outer surface of two plugs with workpiece 3
Hole small―gap suture interference fits, to ensure the axiality of mandrel 4 and workpiece 3 and easy to disassemble.The nut 6 at the both ends of mandrel 4 is screwed, is made
Mandrel 4 and workpiece 3 are combined into one.Then formed by the casting hole 7 of plug 5 with holes to mandrel 4, workpiece 3 and two plugs
Cavity injection paraffin 2.Paraffin injection uses pressure injection, and the situation that paraffin condensation is shunk is should be noted that when injecting paraffin 2, is mended at any time
Paraffin solution is filled, to prevent paraffin shrinkage cavity phenomenon, or uses to be slowly injected into the later stage of paraffin injection and keeps pressure
Method, avoid paraffin shrinkage cavity.
After paraffin is populated, the center hole 9 of the one end of mandrel 4 and the top cooperation of lathe bare terminal end, the other end are top
Hole 9 and the top cooperation of tail stock, top axiality before and after guarantee.Installation have good positioning after, can turnery processing, because of cylinder
Shape workpiece wall is thin, small Lathe quantity is used during turning, from appropriate coolant.
After above-mentioned frock, thin_wall cylinder part can realize turnery processing, and its turning process method is:
1)Rough turned piece is cylindrical, endoporus and end face, each 2~3mm of made allowance;
2)Smart car inner hole of workpiece and end face, length meet drawing size, 0.3~0.5mm of endoporus made allowance;
3)Smart car inner hole of workpiece is to drawing requirement;
4)Frock and workpiece are combined, inject paraffin;
5)The both ends of mandrel 4 thimble location and installation;
6)Use coolant, smart car excircle of workpiece to drawing requirement.
After processing, disassembling fixture, the paraffin in workpiece is melted, obtain the work that thin wall cylinder-shaped meets the requirement of drawing size
Part.
Turning tool of the present invention is simple in construction, easy to operate, and clamping force is acted directly on mandrel 4, does not act on work
On part 3, solves the problems, such as Workpiece clamping;Injection paraffin 2, solves the problems, such as work pieces process elastic deformation in workpiece;It is processed
Coolant in journey prevents the turning heat in turning process;Small Lathe quantity Excircle machining solves Cutting Force problem on deformation;Core
The center hole 9 and plug at axle both ends employ small―gap suture interference fits with step 8 and inner hole of workpiece, solve position error
With dismounting problem.The present invention can obtain thin wall cylinder-shaped workpiece by turnery processing, and ensure that adding for thin wall cylinder-shaped workpiece
Work precision.