A kind of large-scale table top of high flatnessTechnical field
This utility model is related to mechanics experimental equipment field and in particular to high flatness large-scale table top during mechanical test.
Background technology
Large-scale level table is being usually applied to dynamic environmental test equipment, such as horizontal vibration platform etc..Nowadays in order to tryTest the integrity of the precision equipments such as satellite, shell, aero-engine, the instrument reliability of function and structure under various circumstances,It is required for carrying out dynamic environmental test, such as vibration test, impact test etc..For vibration table, not only need in thrustDeng meet on technical parameter large-scale measured piece outer in addition it is also necessary to sufficiently large mounting plane.
Large-scale level table processing is always in field of machining compares stubborn problem, and main cause has following a few sideFace.Certainly it is the problem of raw material first, producing large-scale table top needs large-sized sheet material, can meet the sheet material market of table top size notNecessarily have it is difficult to purchase, can consider that two boards are spliced in this case, be like this natively difficult to ensure that is flatFace degree becomes more thorny after splicing.Two is that large-scale table top processing needs the work top of imperial milling sufficiently large, and this is reason certainlyThink state, if in the case of the table top not meeting requirement, little table top dragon milling is also to complete to process after certainly changing frock,In a word process equipment be large-scale table top processing thorny the reason one of.It is also finally the most key, large-scale table top processing sideMethod and the guarantee of flatness, the bigger flatness of table top is more difficult to ensure that, especially aluminium alloy, the sheet material of magnesium alloy material are addingIt is easy to deformation when work and lifting, a millimeter rank can be reached.
Content of the invention
For solving above-mentioned technical problem, goal of the invention of the present utility model is to provide and a kind of both can guarantee that large-scale table topFlatness, can guarantee that the globality of large-scale table top and the large-scale table top of high flatness of firmness again.
For achieving the above object, this utility model provides following technical scheme：A kind of large-scale table top of high flatness,Described large-scale table top includes the first mini-mesa and the second mini-mesa that left and right arranges and is stitched together, and described first is littleThe upper and lower surface of the upper and lower surface of type table top and described second mini-mesa flushes respectively, and described first mini-mesa is provided with and is located atThe first step-like Mosaic face of its right-hand member and pass through described first Mosaic face and with left and right directions at an acute angle angle firstConnecting hole, described second mini-mesa is provided with positioned at the second step-like Mosaic face of its left end with through described second Mosaic faceAnd the second connecting hole with left and right directions angle at an acute angle, described first Mosaic face and described second Mosaic face abut in oneRise, the coaxial insertion and being connected on same bolt with described second connecting hole of described first connecting hole.
In technique scheme, described first Mosaic face includes the first upside vertical plane, the first downside vertical plane and theOne by-level face, described first upside vertical plane is setting up and down with the described first downside vertical plane and staggers in left and right, describedThe left end in the first by-level face and right-hand member respectively with the described first upside vertical plane and the described first downside vertical phase of vertical planeConnect, described second Mosaic face includes the second upside vertical plane, the second downside vertical plane and the second by-level face, described secondUpside vertical plane is setting up and down and stagger in left and right with the described second downside vertical plane, the left end in described second by-level face withRight-hand member respectively with described second upside vertical plane and described second downside vertical plane vertical connection, described first upside vertical plane withJust right about described second upside vertical plane, just right, institute about vertical plane on the downside of described first downside vertical plane and described secondFirst by-level face of stating is just right up and down with described second by-level face.
In technique scheme, the above-below direction size of described first upside perpendicular is much larger than described first downside and erectsThe above-below direction size of straight plane, the above-below direction size of described second upside perpendicular is much larger than described second downside verticallyThe above-below direction size of plane, described first upside perpendicular fits tightly composition vertically with described second upside perpendicularBinding face, described first by-level face and described second by-level face fit tightly and constitute horizontal abutment face, and described firstIt is provided with gap, described bolt passes through described vertical binding face between downside vertical plane and described second downside vertical plane.
In technique scheme, in described first Mosaic face and described second Mosaic face, one of Mosaic face is arrangedThere is locating slot, another Mosaic face is provided with positioning convex, described positioning convex is movably slidably connected in left-right directionBe positioned in described locating slot in described locating slot and along the longitudinal direction.
In technique scheme, described acute angle is 10 degree～30 degree.
In technique scheme, described acute angle is 18 degree.
In technique scheme, in described first connecting hole and described second connecting hole, one of connecting hole is provided withThe counterbore that mates with the head of described bolt and with extraneous insertion, another connecting hole is provided with the screw rod with described boltThe screw thread joined.
In technique scheme, the upper and lower surface of described first mini-mesa is not little with the perpendicularity of described first Mosaic faceIn 0.02mm, the upper and lower surface of described second mini-mesa is not less than 0.02mm with the perpendicularity of described second Mosaic face.
Because technique scheme is used, this utility model compared with prior art has following advantages：This utility modelDisclosed large-scale table top, employing step positioning when being spliced by it, connected mode then adopt 18 ° of leaning threads to connect, rationallyMethod of attachment and reliable connect, and the processing method of splicing back plane degree is it is ensured that spliced large-scale table top has relativelyGlobality well, intensity and reliability.
Brief description
Fig. 1 is the overall schematic of large-scale table top disclosed in this utility model；
Fig. 2 is the partial schematic diagram of the first mini-mesa and the second mini-mesa link position disclosed in this utility model；
Fig. 3 is the schematic diagram of imperial milling table top disclosed in this utility model；
Fig. 4 is placed on the schematic diagram on imperial milling table top for large-scale table top disclosed in this utility model.
Wherein, the 100, first mini-mesa；110th, the first connecting hole；121st, the first upside vertical plane；122nd, on the downside of in the of firstVertical plane；123rd, the first by-level face；200th, the second mini-mesa；210th, the second connecting hole；221st, the second upside vertical plane；222nd, the second downside vertical plane；223rd, the second by-level face；300th, bolt；400th, imperial milling table top；410th, isometry block；420th, evenFishplate bar；430th, block.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.BelowEmbodiment is used for this utility model is described, but is not limited to scope of the present utility model.
Referring to Fig. 1 to Fig. 4, as shown in legend therein, a kind of large-scale table top of high flatness, described large-scale table top includes a left sideRight the first mini-mesa 100 arranging and being stitched together and the second mini-mesa 200, the first mini-mesa 100 upper and lowerThe upper and lower surface of surface and the second mini-mesa 200 flushes respectively, and the first mini-mesa 100 is provided with step-like positioned at its right-hand memberThe first Mosaic face and pass through this first Mosaic face and the first connecting hole 110 with left and right directions angle at an acute angle, second is littleThe second step-like Mosaic face that type table top 200 is provided with positioned at its left end becomes with through this second Mosaic face and with left and right directionsSecond connecting hole 210 of acute angle, the first Mosaic face is sticked together with the second Mosaic face, the first connecting hole 110 and secondThe coaxial insertion of connecting hole 210 and being connected on same bolt 300.
Above-mentioned first Mosaic face includes first upside vertical plane the 121, first downside vertical plane 122 and the first by-levelFace 123, the first upside vertical plane 121 is setting up and down with the first downside vertical plane 122 and stagger in left and right, the first by-level face123 left end and right-hand member respectively with the first upside vertical plane 121 and the first downside vertical plane 122 vertical connection, above-mentioned second spellingJunction includes second upside vertical plane the 221, second downside vertical plane 222 and the second by-level face 223, and the second upside is verticallyFace 221 is setting up and down with the second downside vertical plane 222 and staggers in left and right, and the left end in the second by-level face 223 and right-hand member divideNot with the second upside vertical plane 221 and the second downside vertical plane 222 vertical connection, on the upside of the first upside vertical plane 121 and secondVertical plane 221 about just to and fit tightly the vertical binding face of composition, vertical plane on the downside of the first downside vertical plane 122 and second222 about just to and between gap is set, the first by-level face 123 and the second by-level face about 223 just to andFit tightly composition horizontal abutment face.
Wherein first connecting hole 110 is screw, and the second connecting hole 120 is unthreaded hole, and the second connecting hole 120 is provided with counterbore.
The above-below direction size of the first upside perpendicular 121 is much larger than the above-below direction of the first downside perpendicular 122Size, the above-below direction size of the second upside perpendicular 221 is much larger than the above-below direction chi of the second downside perpendicular 222Very little, bolt 300 passes through vertical binding face.
Above-mentioned acute angle is 18 degree.
Second connecting hole 210 be provided with the counterbore mating with the head of bolt 300 and with extraneous insertion, the first connecting hole110 are provided with the screw thread mating with the screw rod of bolt 300.
The upper and lower surface of the first mini-mesa 100 and the perpendicularity of the first Mosaic face are not less than 0.02mm, second small-sizedThe upper and lower surface in face 200 is not less than 0.02mm with the perpendicularity of the second Mosaic face.
The processing method that above-mentioned large-scale table top is described below, is processed on imperial milling table top 400, on imperial milling table top 400It is provided with some isometry blocks 410, when the size of imperial milling table top 400 is not big, in the one side or the multi-lateral setting of imperial milling table top 400Connecting plate 420, connecting plate is also installed isometry block 410, each isometry block 410 is worked into same altitude datum, the depth of parallelism reaches0.02mm, installs block 430 according to direction of feed, in case jumping during processing, above-mentioned comprises the steps：
(1) respectively roughing and half finishing are carried out successively to the first mini-mesa 100 and the second mini-mesa 200 firstWork, then respectively the upper and lower surface of milling the first mini-mesa 100, the first Mosaic face, the second mini-mesa 200 upper and lower surface withAnd second Mosaic face, bore and attack the first connecting hole 110 and the second connecting hole 210；When processing the first mini-mesa 100, little with firstOn the basis of the upper surface of type table top 100, the lower surface of finish-milling the first mini-mesa 100, thickness stays 2～3mm surplus it is ensured that firstThe lower surface of mini-mesa 100 and first upside vertical plane perpendicularity be not more than 0.02mm, finish-milling first Mosaic face to size,Overturn the first mini-mesa 100, on the basis of the lower surface of the first mini-mesa 100, calibration the first upside vertical plane 121, boresTapping female bore simultaneously expands counterbore, inlays swivel nut；When processing the second mini-mesa 200, with the upper surface of the second mini-mesa 200 it is firstBenchmark, the lower surface of finish-milling the second mini-mesa 200, light goes out, and thickness stays 2～3mm surplus, rough mills the second Mosaic face, thickDegree leaves finish-milling surplus, overturns the second mini-mesa 200, on the basis of the lower surface of the second mini-mesa, on the upside of calibration secondVertical plane, counter after processing inclined scrapes counterbore；
(2) calibration the first mini-mesa 100 and the second mini-mesa 200, the first Mosaic face and the second Mosaic face are reclinedTogether, by wearing the bolt 300 being connected in the first connecting hole 110 and the second connecting hole 210 by the first mini-mesa 100 andTwo mini-mesa 200 are stitched together and obtain large-scale table top；
(3) above-mentioned large-scale table top is placed on isometry block 410, block 430 is installed according to direction of feed, in case during processingJump, according to parallelism precision situation, it is determined whether processing top and bottom, process in its natural state, the large-scale table top of finish-milling upperLower surface, repeatedly overturns, and the processing depth of cut is not more than 1mm, prevents level table from deforming, corrects front end face benchmark, will by drawingThe each overall dimensions of refinement milling become.It should be noted that the lower planes of level of protection table top in the course of processing, it is sure not to scratch.
Wherein, in step (2), after the first mini-mesa 100 and the second mini-mesa 200 are stitched together, then lead toCross fixed block and will splice reinforcement fixation at gap, to prevent from, in large-scale table top transportation, situations such as fracture occurs.
Embodiment two
Remaining is identical with embodiment one, and difference is, in above-mentioned first Mosaic face and above-mentioned second Mosaic face, whereinIt is provided with locating slot on one Mosaic face, another Mosaic face is provided with positioning convex, above-mentioned positioning convex is in left-right directionMovably it is slidably connected in above-mentioned locating slot and be positioned at along the longitudinal direction in above-mentioned locating slot.
Embodiment three
Remaining is identical with embodiment one, and difference is, above-mentioned acute angle is 20 degree.
It is more than the description to this utility model embodiment, by the described above to the disclosed embodiments, make abilityDomain professional and technical personnel is capable of or uses this utility model.To multiple modifications of these embodiments professional skill to this areaWill be apparent from for art personnel, generic principles defined herein can without departing from of the present utility model spirit orIn the case of scope, realize in other embodiments.Therefore, this utility model is not intended to be limited to these realities shown in this articleApply example, and be to fit to the wide scope consistent with principles disclosed herein and features of novelty.