CN103056622A - Method for machining upper bearing ring raceways of gantry of gantry crane - Google Patents
Method for machining upper bearing ring raceways of gantry of gantry crane Download PDFInfo
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- CN103056622A CN103056622A CN2013100258729A CN201310025872A CN103056622A CN 103056622 A CN103056622 A CN 103056622A CN 2013100258729 A CN2013100258729 A CN 2013100258729A CN 201310025872 A CN201310025872 A CN 201310025872A CN 103056622 A CN103056622 A CN 103056622A
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- upper supporting
- supporting ring
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Abstract
A method for machining bearing circular raceways of a gantry of a gantry crane is characterized by including the steps of firstly, performing arc machining to an inner plate of an upper bearing ring by a vertical rotary moving tool head; secondly, evenly dividing a raceway into a plurality of segments, milling two ends of each segment to obtain 45-degree slants, rolling each segment into the arc shape; thirdly, welding the segments of the raceway on the inner arc plate of the upper bearing ring by fixed welding, connecting the segments end to end during welding to form a complete ring raceway, linking the 45-degree slants of the segments tightly, fixing the raceway on the inner arc plate of the upper bearing ring by bolts; and fourthly, subjecting the surface of the raceway to high-frequency surface quenching to increase the hardness and wear resistance of the surface of the raceway. The large-sized rotary bearings can be produced and machined by the method even without large lathes, and the method is applicable to small- and medium-sized enterprises and is low in cost and convenient for raceway maintenance.
Description
Technical field
The present invention relates to the processing method of upper supporting ring raceway in a kind of rotary-column type pivoting support, particularly a kind of processing method of the large-size pivoting support upper supporting ring raceway for gantry crane.
Background technology
Rotating mechanism is the important process mechanism of gantry crane, can make superstructure do 360 ° of full rotation campaigns.This just requires its stable working, function admirable, guarantees the normal rotary work of door machine.The pivoting support of the rotating mechanism of prior art can be divided into pillar and rotating disc type, and pillar can be divided two kinds of rotary-column type and fixed column types.Its rotary-column type pivoting support has two kinds of structural shapes, and wherein a kind of is that raceway is fixed on the upper supporting ring of door frame, and 4 groups or 6 groups of horizontal rollers are done planetary motion along raceway.The rotary column lower end of the pivoting support of this structure is bearing in by self-aligning thrust roller bearing on the entablature of door frame (such as Fig. 1).The upper end links together by high-strength bolt and rotating disk, 1 centre that is bolted on rotary column of horizontal roller, and roller 1 is rotatablely move (such as the Fig. 2) that roll along the raceway 3 that is fixed on door frame upper supporting ring 2.Pivot pin then is equipped with in the door frame upper supporting ring outside, and the driving that rotary column rotatablely moves then is to drive vertical planetary reducer by vertical machine, at its shaft the cycloid gear of double rows of teeth is housed, the needle pin engagement of itself and upper support, thus rotary column is rotated.Pivoting support is in operation process, and raceway is subject to the extruding of roller heavy duty, serious wear, so the processing of upper supporting ring raceway is the key of gantry crane rotating mechanism.
As the rotary-column type pivoting support that uses in the gantry crane, because volume, the weight of gantry crane are all very large, volume, the weight of the pivoting support that therefore uses are also very large.Take 150t gate seat machine as example, 12 meters of its external diameters of upper supporting ring, 7.7 meters of internal diameters, highly it is 1.3 meters, weight reaches 40 tons, the large-scale plane vertical lathe that general middle-size and small-size factory seldom has diameter to reach 12 meters is processed, therefore, in the basic processing problems of the large-scale upper supporting ring of unable solution of medium-sized and small enterprises.Such as cooperation processing, super wide because of its size traverse, place superelevation vertically, can't transport at highway at all.There is increase to start shipment by lighter, fall to refuting expense such as the water route transportation, and or can not solves enterprises turnover problem.It is also inconvenient when simultaneously, raceway is subject to needing to keep in repair after the extruding of roller heavy duty.
For addressing the above problem, the inventor has found out and has not a kind ofly needed to use large-scale lathe to carry out processing method to large-scale rotary-column type pivoting support.
Summary of the invention
The invention provides a kind of processing method of gantry crane door frame upper supporting ring raceway, purpose is to solve the prior art problem, providing a kind of needn't use large-scale lathe to get final product the processing method that machining large rotary-column type pivoting support upper supporting ring raceway is produced, this processing method is suitable for medium-sized and small enterprises, and with low cost, make things convenient for the raceway maintenance.
The present invention's technical scheme that adopts of dealing with problems is:
The processing method of gantry crane door frame upper supporting ring raceway may further comprise the steps;
1) upper supporting ring interior plate arc machining:
Upper supporting ring is placed on the moulding bed, adjust level with laser transit, the vertical rotating dynamic cutter head is arranged in the center of upper supporting ring, adjust the position of dynamic cutter head with boring bar, make the pivot of cutter head and the center superposition of upper supporting ring, the upper supporting ring interior plate is carried out arc machining, form upper supporting ring inner arc plate, its concentricity≤0.2 ~ 0.5mm;
Internal diameter size after the processing guarantees in ± 0.5mm the margin of tolerance;
2) processing of raceway:
A is divided into some sections segmentations with raceway according to upper supporting ring size uniform;
C is at each section segmentation difference auger shell keyhole and counter sink;
D rolls into respectively arc with each section segmentation;
3) installation of raceway:
A is welded in each raceway segmentation on the upper supporting ring inner arc plate with fixing, and in welding process, adjacent each section segmentation head and the tail closely link together, and form at last a complete circular raceway, its gap≤0.1 ~ 0.2mm;
B drilling again on the upper supporting ring inner arc plate of fixing raceway;
C penetrates the bolt direct rotary in boring tight, and raceway is fixed on the upper supporting ring inner arc plate;
4) heat treatment:
For case hardness and the wearability that improves raceway 3, with rotating hardening machine roller surface is carried out high-frequency surface hardening.
In the raceway process, Bao processing is carried out respectively in each raceway segmentation, mills out respectively 45 ° of tilt ports at each section segmentation two ends.
Further, raceway evenly is divided into 6～8 sections segmentations.
Further, the adjacent sectional junction has the gap, its gap≤0.1 ~ 0.2mm.
Further, roller surface hardness is HRC45 ~ 50, the degree of depth 2 ~ 3mm after the quenching.
Further, after raceway installs, carry out with the rotary vertical unit head raceway internal diameter being carried out fine finishining before the heat treatment step, its diameter error is not more than ± 0.1mm.
Beneficial effect of the present invention: the processing method among the present invention is owing to adopt large-scale raceway segmentation, and process respectively and be fixed on the upper supporting ring, therefore needn't use large-scale lathe to carry out production and processing to large-scale rotary-column type pivoting support upper supporting ring raceway.This processing method is suitable for medium-sized and small enterprises, and only dynamic cutter head and boring bar can be processed low production cost.Simultaneously, when raceway needs repairing, can easily single impaired raceway segmentation be disassembled and repair or replace simple, convenience.
Description of drawings
Fig. 1 is the structure chart that the rotary-column type pivoting support is fixed on entablature;
Fig. 2 is the structure chart that roller is fixed on upper support;
Fig. 3 is structure chart after the processing of raceway segmentation Bao;
Fig. 4 is the structure chart of holing in the raceway segmentation;
Fig. 5 is that the raceway segmentation is rolled into arc;
Fig. 6 holes at upper supporting ring inner arc plate;
Fig. 7 penetrates bolt to screw in boring.
Among the figure: 1. roller, 2. upper supporting ring, 3. raceway, 4. raceway segmentation, 5. upper supporting ring inner arc plate, 6. boring, 7. bolt.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
The processing method of gantry crane door frame upper supporting ring raceway may further comprise the steps;
1) upper supporting ring interior plate arc machining:
Upper supporting ring is placed on the moulding bed, adjust level with laser transit, the vertical rotating dynamic cutter head is arranged in the center of upper supporting ring, adjust the position of dynamic cutter head with boring bar, make the pivot of cutter head and the center superposition of upper supporting ring, the upper supporting ring interior plate is carried out arc machining, form upper supporting ring inner arc plate 5, its concentricity≤0.2 ~ 0.5mm;
Internal diameter size after the processing guarantees in ± 0.5mm the margin of tolerance;
2) processing of raceway:
A is divided into some sections segmentations 4 with raceway 3 according to upper supporting ring size uniform; Reasonably the quantity of segmentation 4 not only can alleviate the workload of installation, and can guarantee to connect closely between each segmentation 4, in the present embodiment raceway 3 evenly is divided into 6～8 sections.
B carries out Bao processing to each section segmentation 4 respectively, and mills out respectively 45 ° of tilt port (see figure 3)s at each section segmentation 4 two ends.The purpose of this tilt port is in order closely to link together between the adjacent sectional in the subsequent process 4, if the tilt port of other angles or do not offer tilt port and can realize that also the junction can closely link together between adjacent sectional in fact, also can not offer tilt port or offer the tilt port of other angles, closely link together as long as can realize the adjacent sectional junction.
C is at each section segmentation 4 difference auger shell keyhole and counter sinks; (see figure 4)
D rolls into respectively arc with each section segmentation 4; (see figure 5)
3) installation of raceway:
A fixes each raceway segmentation 4 usefulness and is welded on the upper supporting ring inner arc plate 5, and in welding process, adjacent each section segmentation 4 head and the tail link together, and form at last a complete circular raceway 3.Wherein 45 ° of angles are connected closely its gap≤0.1 ~ 0.2mm between each section segmentation 4;
B drilling 6 again on the upper supporting ring inner arc plate 5 of fixing raceway; (see figure 6)
C penetrates bolt 7 and screws in boring 6, raceway is fixed on the upper supporting ring inner arc plate 6; (see figure 7)
4) heat treatment:
For case hardness and the wearability that improves raceway 3, with rotating hardening machine roller surface is carried out high-frequency surface hardening.Roller surface hardness is HRC45 ~ 50, the degree of depth 2 ~ 3mm after quenching.
Because raceway 3 is to be spliced by several sections arcuate segments, not round and smooth for preventing spliced raceway internal diameter plane, affect the rolling of roller on raceway 3, after raceway 3 installs, carry out before the heat treatment step, with the rotary vertical unit head internal diameter of raceway 3 is carried out fine finishining, its diameter error is not more than ± 0.1mm.
This processing method is divided into some segmentations with large-scale raceway, and processes respectively and be fixed on the upper supporting ring, therefore needn't use large-scale lathe to carry out production and processing to large-scale rotary-column type pivoting support upper supporting ring raceway.This processing method is suitable for medium-sized and small enterprises, and only dynamic cutter head and boring bar can be processed low production cost.Simultaneously, when raceway needs repairing, can easily single impaired raceway segmentation be disassembled and repair or replace simple, convenience.
Claims (6)
1. the processing method of gantry crane door frame upper supporting ring raceway is characterized in that: may further comprise the steps;
1) upper supporting ring interior plate arc machining:
Upper supporting ring is placed on the moulding bed, adjust level with laser transit, the vertical rotating dynamic cutter head is arranged in the center of upper supporting ring, adjust the position of dynamic cutter head with boring bar, make the pivot of cutter head and the center superposition of upper supporting ring, the upper supporting ring interior plate is carried out arc machining, form upper supporting ring inner arc plate, its concentricity≤0.2 ~ 0.5mm;
Internal diameter size after the processing guarantees in ± 0.5mm the margin of tolerance;
2) processing of raceway:
A is divided into some sections segmentations with raceway according to upper supporting ring size uniform;
B is at each section segmentation difference auger shell keyhole and counter sink;
C rolls into respectively arc with each section segmentation;
3) installation of raceway:
A is welded in each raceway segmentation on the upper supporting ring inner arc plate with fixing, and in welding process, adjacent each section segmentation head and the tail closely link together, and form at last a complete circular raceway;
B drilling again on the upper supporting ring inner arc plate of fixing raceway;
C penetrates the bolt direct rotary in boring tight, and raceway is fixed on the upper supporting ring inner arc plate;
4) heat treatment:
With rotating hardening machine roller surface is carried out high-frequency surface hardening.
2. processing method as described in claim 1, it is characterized in that: in the raceway process, Bao processing is carried out respectively in each raceway segmentation, mills out respectively 45 ° of tilt ports at each section segmentation two ends.
3. processing method as described in claim 1 is characterized in that: raceway evenly is divided into 6～8 sections segmentations.
4. processing method as described in claim 1, it is characterized in that: adjacent raceway connection segment place has the gap, its gap≤0.1 ~ 0.2mm.
5. processing method as described in claim 1, it is characterized in that: roller surface hardness is HRC45 ~ 50, the degree of depth 2 ~ 3mm after quenching.
6. processing method as described in claim 1 is characterized in that: carry out after raceway installs before the heat treatment step, with the rotary vertical unit head internal diameter of raceway is carried out fine finishining, its diameter error is not more than ± 0.1mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100258729A CN103056622A (en) | 2013-01-23 | 2013-01-23 | Method for machining upper bearing ring raceways of gantry of gantry crane |
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| CN2013100258729A CN103056622A (en) | 2013-01-23 | 2013-01-23 | Method for machining upper bearing ring raceways of gantry of gantry crane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032100A (en) * | 2014-06-04 | 2014-09-10 | 中钢集团西安重机有限公司 | A flame surface quenching device for big and medium thin lining plates and a method thereof |
| CN107199438A (en) * | 2016-03-18 | 2017-09-26 | 徐州万达回转支承有限公司 | The processing technology of WEA12 revolution driving pivoting supports |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU697385A1 (en) * | 1973-12-24 | 1979-11-15 | Всесоюзный научно-исследовательский институт строительного и дорожного машиностроения | Slewing support securing device |
| US4248488A (en) * | 1979-02-07 | 1981-02-03 | Rotek Incorporated | Quick disconnect bearing mount for construction machinery |
| CN101555907A (en) * | 2009-05-22 | 2009-10-14 | 马鞍山精一工程机械有限公司 | Ball-type slewing bearing with asymmetric raceway and processing method thereof |
| CN202011698U (en) * | 2011-03-22 | 2011-10-19 | 上海电力机械厂 | Large-scale portal slewing bearing of full-circle swing crane |
| CN202022670U (en) * | 2011-04-12 | 2011-11-02 | 武汉船用机械有限责任公司 | Isolated pillar crane with horizontal idler wheels arranged asymmetrically |
| CN202203284U (en) * | 2011-05-12 | 2012-04-25 | 洛阳新强联回转支承有限公司 | Raceway of intersected cylinder type pivoting support |
| CN202348972U (en) * | 2011-11-28 | 2012-07-25 | 中联重科股份有限公司 | Rotary support element and mechanical equipment |
-
2013
- 2013-01-23 CN CN2013100258729A patent/CN103056622A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU697385A1 (en) * | 1973-12-24 | 1979-11-15 | Всесоюзный научно-исследовательский институт строительного и дорожного машиностроения | Slewing support securing device |
| US4248488A (en) * | 1979-02-07 | 1981-02-03 | Rotek Incorporated | Quick disconnect bearing mount for construction machinery |
| CN101555907A (en) * | 2009-05-22 | 2009-10-14 | 马鞍山精一工程机械有限公司 | Ball-type slewing bearing with asymmetric raceway and processing method thereof |
| CN202011698U (en) * | 2011-03-22 | 2011-10-19 | 上海电力机械厂 | Large-scale portal slewing bearing of full-circle swing crane |
| CN202022670U (en) * | 2011-04-12 | 2011-11-02 | 武汉船用机械有限责任公司 | Isolated pillar crane with horizontal idler wheels arranged asymmetrically |
| CN202203284U (en) * | 2011-05-12 | 2012-04-25 | 洛阳新强联回转支承有限公司 | Raceway of intersected cylinder type pivoting support |
| CN202348972U (en) * | 2011-11-28 | 2012-07-25 | 中联重科股份有限公司 | Rotary support element and mechanical equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032100A (en) * | 2014-06-04 | 2014-09-10 | 中钢集团西安重机有限公司 | A flame surface quenching device for big and medium thin lining plates and a method thereof |
| CN107199438A (en) * | 2016-03-18 | 2017-09-26 | 徐州万达回转支承有限公司 | The processing technology of WEA12 revolution driving pivoting supports |
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