Rigidity dispersoid compliance-adjustable grinding head for polishing
(1) technical field
The present invention relates to a kind of mold freedom curved surface polishing tool that is used with the multiple degrees of freedom Digit Control Machine Tool, can be applicable to the occasion of mold polish automation.
(2) background technology
In recent years, the development of mold manufacturing industry is swift and violent day by day, and involvement aspect is increasingly extensive.Such as automobile, aviation, boats and ships, toy, electronic product, civilian household electrical appliances etc., almost do not have can't be obtained.In mould was made, the surface of mold cavities such as plastics mould, compression mod, forge mould was complicated, the ratio height that free form surface is shared, processing technology difficulty maximum, very high to its surface roughness requirement, thus must carry out the die cavity polishing, to improve the service life of mould.Polishing accounts for 30%50% of entire die manufacturing time its process time as one important procedure of mold cavity processing, and its cost accounts for 5%~30% of complete manufacturing cost.Polishing has become the bottleneck in the die manufacture.
Mold polish directly influences the quality of die quality, and the still manual polishing of the topmost polishing mode of free form surface mould at present exists that working ability is poor, polishing efficiency is low, labour intensity is big, to shortcomings such as polisher's experience, specification requirement height.Consult existing tradition and there is following shortcoming in novel free form surface polishing tool: 1, polishing tool and free form surface contact area are little, and polishing efficiency is lower; 2, traditional flexible polishing instrument generally is to utilize spring or flexible polishing material to obtain to contact with the flexibility of being thrown between the curve surface of workpiece, with the bad adaptability of free form surface; 3, can not regulate the rigidity of polishing capsule by real-time online, accurately polish or revise according to the free form surface characteristic is local; 4, polish abrasive applies difficulty, the equipment therefor complexity; 5, common air bag polishing tool is subjected to the restriction of the condition of air bag own, can not control polishing scrotiform shape during high-precision real, and is poor with curve surface adaptive; 6, ultrasonic mechanical polishing tool is owing to be subjected to the restriction of ultrasonic amplitude and power, only is suitable for partial operations such as narrow, deep trouth, fillet, corner angle, and the large tracts of land polishing efficiency is low; 7, existing flexible polishing technology, has higher polishing precision, but because the excursion of pad material, polishing capsule rigidity is little, and the reason of real-time controlled difference, can't realize functions such as the size correction of mold freedom curved surface and the thick throwings of high efficiency.
(3) summary of the invention
For overcome polishing capsule partially flexible contact that existing mold freedom curved surface polishing tool exists to the free form surface bad adaptability, can not control in real time polishing capsule rigidity, curved surface polishing efficient low, can not carry out shortcoming such as curved surface size correction, the invention provides a kind of, the rigidity dispersoid compliance-adjustable grinding head for polishing that can in real time control polishing capsule rigidity, curved surface polishing efficient height, can carry out curved surface size correction good to free form surface adaptability.
The technical solution adopted for the present invention to solve the technical problems is:
Rigidity dispersoid compliance-adjustable grinding head for polishing, described grinding head for polishing comprises with the polishing capsule of leather material as working face, be filled with the magnetic conduction rigid particles in the polishing capsule, the mounting bracket of described polishing capsule connects the hollow rotating shaft of a magnetic conduction, described hollow rotating shaft is contained in the sleeve by bearing, described hollow rotating shaft is equipped with inductance coil outward, the cavity of rotating shaft is connected with the pipeline of input polishing abrasive particle, the centre bore of described polishing rami capsulares frame is communicated with the cavity of described rotating shaft, has the polishing abrasive particle that is communicated with the centre bore of described support on the working face of described polishing capsule and overflows opening.
Further, the working face of described polishing capsule is the ring-type curved body polishing pad that ox-hide is made, and polishing is provided with the rubber liner with described polishing pad form fit in the capsule, and described polishing abrasive particle overflows opening opens sunken inside place at described ring-type curved body polishing pad.
Further, described hollow rotating shaft upper support has two bearing spiders, in the fore bearing bearing of nearly polishing capsule side the angular contact ball bearing that is used for the hollow rotating shaft axial location is housed, in the rear bearing bearing away from polishing capsule side radial ball bearing is housed, when leaving hollow rotating shaft heat in the described rear end bearing bearing and rising, the space of radial ball bearing play.
Preferably, the transition face between described rotating shaft and the described mounting bracket is the conical surface.
Preferably, described inductance coil is a dc coil.
The dismounting nut that is used to polish the capsule dismounting is housed on the described hollow rotating shaft.
Basic principle of the present invention is: rigidity dispersoid compliance-adjustable grinding head for polishing can be clamped in Digit Control Machine Tool, carries out the high speed rotation on the unit head as industrial robot, numerical control machining center etc.; Change the intensity and the distribution of polishing capsule surrounding magnetic field by the electric current of regulating winding, and then regulate the distribution and the modulus of shearing of polishing a capsule internal rigid magnetic conduction prose style free from parallelism and regulate polishing capsule rigidity, polish pressure is changed, form the flexible polishing working face; The ring-type curved body polishing pad with holes that ox-hide is made forms annular flexible polishing working face when work can form even flexible contact of large tracts of land with the free form surface of polished workpiece easily; The polish abrasive that flows down in the hollow rotating shaft is under the acting in conjunction of the extruding force that produces between the centrifugal force that polishes capsule rotation generation and polishing pad and the workpiece, abrasive material evenly distributes between polishing pad and workpiece, can improve the precision of polishing and the uniformity of texture, the material removing rate when having improved polishing simultaneously; The multiple degrees of freedom control system that lathe has can be regulated the polishing attitude of bistrique, realizes the automation of polishing.
The beneficial effect of rigidity dispersoid compliance-adjustable grinding head for polishing of the present invention mainly shows;
The distribution and the modulus of shearing of rigidity dispersoid that (1) can be by the size of current on the regulating winding, direction real-time online control polishing capsule inside, change polishing capsule rigidity, and then normal pressure between the free form surface of change polishing face and polished workpiece, improve polishing effect and polishing efficiency;
(2) the polishing capsule formed of ring-type curved body polishing pad with holes, rubber liner, mounting bracket and the magnetic conduction rigid particles of being made by ox-hide can make polish abrasive flow into smoothly in conjunction with hollow shaft, be evenly distributed on the polishing face, improve the precision of polishing and the uniformity of texture, material removing rate when having improved polishing simultaneously improves the efficient of polishing;
(3) can be used with multiple lathe easily, adopt different abrasive material or polishing powder, can realize thick the throwing and smart the throwing respectively, realize the automation of polishing, effectively improve polishing efficiency and economic benefit;
(4) can carry out local polishing or finishing according to rigidity, the polish pressure of the characteristic real time altering of free form surface polishing capsule.
(4) description of drawings
Fig. 1 is a structural representation of the present invention.
(5) specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to accompanying drawing: rigidity dispersoid compliance-adjustable grinding head for polishing, described grinding head for polishing comprises with the polishing capsule of leather material as working face, be filled with magnetic conduction rigid particles 3 in the polishing capsule, the mounting bracket 4 of described polishing capsule connects the hollow rotating shaft 11 of a magnetic conduction, described hollow rotating shaft 11 is contained in the sleeve 9 by bearing, the described hollow rotating shaft 11 outer inductance coils 8 that are equipped with, the cavity of rotating shaft 11 is connected with the pipeline of input polishing abrasive particle, the centre bore of described polishing rami capsulares frame 4 is communicated with the cavity of described rotating shaft 11, has the polishing abrasive particle that is communicated with the centre bore of described support 4 on the working face of described polishing capsule and overflows opening 10.
The working face of described polishing capsule is the ring-type curved body polishing pad 1 that ox-hide is made, and polishing is provided with the rubber liner 2 with described polishing pad 1 form fit in the capsule, and described polishing abrasive particle overflows opening 10 opens sunken inside place at described ring-type curved body polishing pad 1.
Described hollow rotating shaft 11 upper supports have two bearing spiders, in the fore bearing bearing 6 of nearly polishing capsule side two angular contact ball bearings 7 that are used for hollow rotating shaft 11 axial location are housed, in the rear bearing bearing 12 away from polishing capsule side a radial ball bearing 13 is housed, when leaving hollow rotating shaft 11 heat in the described rear end bearing bearing 12 and rising, the space of radial ball bearing 13 plays.
Preferably, the transition face between described rotating shaft 11 and the described mounting bracket 4 is the conical surface.
Preferably, described inductance coil 8 is a dc coil.
The dismounting nut 5 that is used to polish the capsule dismounting is housed on the described hollow rotating shaft 11.
Its operation principle is: the outer surface of polishing capsule is covered with the ring-type curved body polishing pad 1 with holes that one deck ox-hide is made, rotation at a high speed under the drive of hollow rotating shaft 11, polish abrasive flows down from hollow rotating shaft 11 smoothly, under the acting in conjunction of the extruding force that produces between the centrifugal force that polishes capsule rotation generation and polishing pad 1 and the workpiece, be evenly distributed between polishing pad 1 and the workpiece, polishing pad 1 forms evenly flexible contact of large tracts of land with the free form surface of polished workpiece and forms the flexible polishing working face, change the intensity and the distribution of polishing capsule surrounding magnetic field by the electric current of regulating inductance coil 4, and then the distribution and the modulus of shearing of regulating the inner magnetic conduction rigid particles 3 of polishing capsule are regulated polishing capsule rigidity, polish pressure is changed, control in real time according to the curved surface characteristic, realize thick the throwing, the smart throwing and partial trim, the effect of improving polishing improves polishing efficiency.