CN102862032B - Once-clamping machining method of large-negative-angle bolt-sphere bolt hole - Google Patents
Once-clamping machining method of large-negative-angle bolt-sphere bolt hole Download PDFInfo
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- CN102862032B CN102862032B CN201210364835.6A CN201210364835A CN102862032B CN 102862032 B CN102862032 B CN 102862032B CN 201210364835 A CN201210364835 A CN 201210364835A CN 102862032 B CN102862032 B CN 102862032B
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Abstract
The invention relates to a once-clamping machining method of a large-negative-angle bolt-sphere bolt hole. The once-clamping machining method is characterized by comprising the following steps of: changing a technical reference surface of 90 DEG into a technical reference surface of 0 DEG, machining a processing hole on the technical reference surface of 0 DEG, clamping a bolt sphere on an L-shaped clamp through the processing hole, regulating a horizontal surface rotating angle alpha of the L-shaped clamp and an elevation angle beta of the bolt sphere according to the following conversion formula so as to finish the once clamping machining of a large-negative-angle bolt hole on the bolt sphere, wherein the conversion formula is as shown in an original PDF, and in the formula, beta is a converted elevation angle, alpha is a converted horizontal angle, beta0 is an elevation angle of an original design paper and alpha0 is a horizontal angle of the original design paper. The once-clamping machining method disclosed by the invention is simple, is easy to realize, fundamentally solves the long-lasting troubled problem on the machining of the large-negative-angle bolt hole on the bolt sphere by creatively changing the reference surface, and can largely improve the production efficiency and reduce the production cost.
Description
Technical field
The present invention relates to the processing method of the bolt sphere in a kind of steel construction piece, especially a kind of processing method of the screw had in large negative angle bolt sphere, specifically a kind of disposable clamping processing method of large negative angle bolt sphere screw.
Background technology
As everyone knows, the indeterminate space structure of high order that is made up of regularly from both direction or several direction many rod members of grid structure.It can bear the load from all directions.Its maximum feature is due to supporting role mutual between rod member, and rigidity is large, good integrity, shock resistance are strong, and can bear due to uneven settlement of foundation adverse effect; Even if when indivedual rod member sustains damage, also can automatically regulate rod member internal force, the security of holding structure.
The rod member connection of rack mainly contains welded spherical node, bolted spherical node and plate node three kinds.Bolted spherical node is by spheroid, steel pipe, conehead or shrouding, high-strength bolt, forms without line nut, jackscrew etc.Wherein spheroid is the solid steel ball of forging and stamping, in steel ball according to the angle of rod member for grid junction carry out boring also car go out thread.The size of ball is determined according to the diameter of bolt and the screw thread length stretched in ball.In order to reduce the volume of ball, burn-on at steel pipe two ends conehead or shrouding formation rod member for grid, bolt is connected with bolt sphere by sleeve.The advantage of grid structure with bolt-sphere joints be install, convenient disassembly, structure adaptability is comparatively large, can assembled various multi-form grid structure by the bolt sphere of same size and rod member.The specification of spheroid and rod member is convenient to seriation, standardization, suitable factorial praluction.But also exist as complicated in joint structure, machining amount is large, and processing technology requirement is high, needs rolling shapes many, the bearing feature such as costly, bolt sphere, as key node, has the processing technology that it is special.
For guaranteeing the precision of bolt sphere, traditional processing method is beforehand with a high-precision frock and L shape calibration special fixture is installed on corresponding lathe; Substantially drawing and related specifications requirement can be met with the finished workpart that indexing fixture is produced.
Bolt sphere adds man-hour on lathe, is generally first process water flat hole (chord member hole), then uses indexing fixture processing inclined (web member hole), general rack bolt ball processing (as Fig. 1), carries out operation card (see table 1) by technician:
Table 1 bolt sphere flow process chart one
Bolt sphere hole machined completes by operation card content by operative employee.Often there is large negative angle hole (as Fig. 2, more than 55 degree) in special-shaped reticulated shell bolt sphere particularly spherical shell rack bolt ball warp, operation card is in table 2:
Table 2 bolt sphere flow process chart two
Because fabrication hole is-90 ° of holes, large negative angle hole easily and fabrication hole interfere, again because fixture is L shape structure, during large negative angle hole machined, fixture blocks drill bushing and milling cutter causes processing.Often when this happens, some planes all first will slightly be cut in the negative angle hole of bolt sphere by technician and operator, and then ball unloaded down correct, correct well and again ball cutting face is worked into drawing requirement, then drilling and tapping, sometimes also to get out a unnecessary bolt hole, again the eyelet welding of unnecessary processing be connect after machining and block polishing; The ball that gets off like this machines and reaches drawing requirement through selecting benchmark several times, can not ensure that machining accuracy spends long time again, and this difficult problem seriously constrains the batch machining of large negative angle screw bolt sphere.
Summary of the invention
The object of the invention is to need multiple clamping for the large negative angle screw in existing bolt sphere, repeatedly find benchmark and just can complete processing, and exist precision inconsistent, there will be the problems such as unnecessary fabrication hole, invent a kind of the disposable clamping processing method of large negative angle bolt sphere screw needing clamped one time can complete the processing of all screws.
Technical scheme of the present invention is:
A kind of disposable clamping processing method of large negative angle bolt sphere screw,-90 degree technological datum faces are it is characterized in that to change into using 0 degree as technological datum face, 0 degree of technological datum face processes fabrication hole, again by this fabrication hole by bolt sphere clamping on L clamp, and according to the following horizontal plane corner α of conversion formula adjustment L clamp and the elevation angle β of bolt sphere, can complete the disposable clamping processing of the large negative angle screw in bolt sphere, described conversion formula is:
=
；
=
/
In formula: the elevation angle after β-conversion; Horizontal angle after α-conversion; β
0the elevation angle on-former design drawing; α
0horizontal angle on-former design drawing.
Described large negative angle refers to that the angle of the close L clamp side of bolt hole center's line position and median plane is not less than 55 degree, and described median plane is parallel with the vertical surface in L clevis face.
Beneficial effect of the present invention:
The inventive method is simple, be easy to realize, it fundamentally solves by the creative datum level that changes the difficult problem perplexing large negative angle bolt hole processing in bolt sphere for a long time, substantially increase production efficiency, reduce production cost, can make be reduced to 10-15 minute from original one hour the process time of each large negative angle bolt sphere.
The present invention, by simple mathematical conversion, obtains required angle, can realize the object that clamped one time can complete the processing of large negative angle.Without the need to repeatedly looking for benchmark.Both ensure that precision, alleviated the amount of labour, and can production efficiency be improve again.
Accompanying drawing explanation
Fig. 1 is the positional structure schematic diagram of the bolt sphere upper bolt hole that common rack uses.
Fig. 2 is the positional structure schematic diagram of the bolt hole in large negative angle bolt sphere of the present invention.
Fig. 3 is the position view being convenient to the bolt hole on processing bolt ball after utilizing method migration of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As Figure 2-3.
A kind of disposable clamping processing method of large negative angle bolt sphere screw, by amendment technological datum face, traditional-90 degree technological datum faces are changed into using 0 degree as technological datum face, 0 degree of technological datum face processes fabrication hole, again by this fabrication hole by bolt sphere clamping on L clamp, and according to the following horizontal plane corner α of conversion formula adjustment L clamp and the elevation angle β of bolt sphere, can complete the disposable clamping processing of the large negative angle screw in bolt sphere, described conversion formula is:
=
；
=
/
In formula: the elevation angle after β-conversion; Horizontal angle after α-conversion; β
0the elevation angle on-former design drawing; α
0horizontal angle on-former design drawing.Described large negative angle refers to that the angle of the close L clamp side of bolt hole center's line position and median plane is not less than 55 degree, and described median plane is parallel with the vertical surface in L clevis face.For Fig. 2, after Reference Transforming, original large negative angle hole then becomes the screw being easy to the conventional angle of processing, as shown in Figure 3, and without the need to changing and checking benchmark in process.Flow process chart after conversion is as shown in table 3.
Table 3 bolt sphere flow process chart three
Comparison sheet 2 and table 3 can find, without the existence of large negative angle in table 3, thus the large negative angle bolt sphere of processing one of traditional handicraft can be wanted more than one hour, reduce to and only need 10-15 minute, substantially increase production efficiency, reduce production cost.
Ball material for the manufacture of bolted spherical node must meet technical conditions and the standard of design code and respective material, and design generally adopts carbon constructional quality steel, and material adopts 45# steel, and technical conditions meet table 4 and table 5 requirement.
Table 4 material chemical composition
| The trade mark | Carbon (C) % | Silicon (Si) % | Manganese (Mn) % | Phosphorus (P) % | Sulphur (S) % |
| 45-GB699 | 0.42—0.50 | 0.17—0.37 | 0.50—0.8 | ≤0.035 | ≤0.035 |
Table 5 material mechanical performance
| The trade mark | Sample blank dimension | Heat treatment | Lower yield strength N/m ㎡ | Tensile strength N/m ㎡ | Elongation after fracture δ 5 |
| 45-GB699 | 25㎜ | Normalizing | 355 | 600 | 16 |
The steel of manufacture bolt sphere can be round steel also can be square steel.The blank processing method of bolt sphere has two kinds: one for casting, and one is die forging.Casting ball easily produces crack, sand holes; Die forging ball quality is good, and work efficiency is high, cost is low.So blank ball generally all adopts hot forging shaping.
The process of bolt sphere is generally: material-chemical composition, mechanical property → ball base forging-technique, equipment, frock and dimensional accuracy, form tolerance, surface quality → normalized treatment → locating and machining screw (fabrication hole)-technique, equipment, frock and ball center are to milling flat distance, boring, tapping → process each screw-technique, equipment, frock and ball center to milling flat distance, boring, tapping.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (1)
1. the disposable clamping processing method of a large negative angle bolt sphere screw,-90 degree technological datum faces are it is characterized in that to change into using 0 degree as technological datum face, 0 degree of technological datum face processes fabrication hole, again by this fabrication hole by bolt sphere clamping on L clamp, and according to the following horizontal plane corner α of conversion formula adjustment L clamp and the elevation angle β of bolt sphere, can complete the disposable clamping processing of the large negative angle screw in bolt sphere, described conversion formula is:
=
；
=
/
In formula: the elevation angle after β-conversion; Horizontal angle after α-conversion; β
0the elevation angle on-former design drawing; α
0horizontal angle on-former design drawing; Described large negative angle refers to that the angle of the close L clamp side of bolt hole center's line position and median plane is not less than 55 degree, and described median plane is parallel with the vertical surface of L clamp.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210364835.6A CN102862032B (en) | 2012-09-26 | 2012-09-26 | Once-clamping machining method of large-negative-angle bolt-sphere bolt hole |
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|---|---|---|---|
| CN201210364835.6A CN102862032B (en) | 2012-09-26 | 2012-09-26 | Once-clamping machining method of large-negative-angle bolt-sphere bolt hole |
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| CN102862032A CN102862032A (en) | 2013-01-09 |
| CN102862032B true CN102862032B (en) | 2015-06-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289881B (en) * | 2014-08-05 | 2016-11-02 | 宁波富信模胚有限公司 | The high-efficiency and precision processing method of plastic mold suspension ring screw |
| CN104289882B (en) * | 2014-08-05 | 2016-11-09 | 宁波富信模胚有限公司 | The processing method of mould upper lift ring screw |
| CN106514155A (en) * | 2016-12-13 | 2017-03-22 | 芜湖天航科技（集团）股份有限公司 | Machining device and method for net rack ball milling and drilling |
| CN108581540B (en) * | 2018-06-29 | 2024-04-09 | 菏泽学院 | Clamp for machining bolt ball by common lathe |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2439935A1 (en) * | 1978-10-25 | 1980-05-23 | Bretagne Ste Metallurg | Prefabricated roof framework - has tubular supports bolted onto hollow spheres at various angles |
| DE3427437A1 (en) * | 1984-07-25 | 1986-01-30 | Linde Ag, 6200 Wiesbaden | Constant-velocity joint |
| CN2148633Y (en) * | 1992-10-21 | 1993-12-08 | 马又华 | Special combined machine tool for performing bolt ball |
| CN201573061U (en) * | 2009-10-16 | 2010-09-08 | 刘全涛 | Bolt-sphere machining and positioning fixture |
| CN202367538U (en) * | 2011-11-01 | 2012-08-08 | 黄河水利职业技术学院 | Ball centre-positioning attitude adjustor for horizontal machine tools for bolt balls |
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Address after: 221004 No. 9, landscape road, Xuzhou Economic Development Zone, Jiangsu, China Patentee after: HUZHOU ZM-BESTA HEAVY STEEL STRUCTURE CO., LTD. Patentee after: Xuzhou coal (Ningxia) Steel Structure Construction Co., Ltd. Address before: 221004 No. 9, landscape road, Xuzhou Economic Development Zone, Jiangsu, China Patentee before: Xuzhou ZM-besta Heavy Steel Structure Co.,Ltd. Patentee before: Xuzhou coal (Ningxia) Steel Structure Construction Co., Ltd. |