CN116812788A - Roller crane revolution structure size control process - Google Patents
Roller crane revolution structure size control process Download PDFInfo
- Publication number
- CN116812788A CN116812788A CN202310971520.6A CN202310971520A CN116812788A CN 116812788 A CN116812788 A CN 116812788A CN 202310971520 A CN202310971520 A CN 202310971520A CN 116812788 A CN116812788 A CN 116812788A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000003754 machining Methods 0.000 claims abstract description 41
- 238000009966 trimming Methods 0.000 claims abstract description 31
- 238000009434 installation Methods 0.000 claims abstract description 16
- 238000007689 inspection Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 42
- 238000005520 cutting process Methods 0.000 claims description 15
- 230000000712 assembly Effects 0.000 claims description 12
- 238000000429 assembly Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/84—Slewing gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a roller crane revolution structure size control process, which is characterized in that: the specific control process is as follows: s1: manufacturing tolerance requirements of the rotary chassis and the lower support; s2: assembling a central beam; s3: assembling auxiliary strip beams and front and back rotary support beams; s4: assembling a main structure of the rotary chassis; s5: assembling front and rear rail bearing beams and a central shaft connecting plate; s6: preparing by machining; s7: machining; in each step, the precision is required to be controlled within a reasonable range, and when the rotating structure of the crane is finally installed, the dimensional precision control of the rotating structure is realized; the step of installing the progressive inspection control precision reduces the assembly efficiency compared with the final inspection installation mode, but ensures the precision requirement, thereby reducing the reworking and trimming probability.
Description
Technical Field
The invention relates to the technical field of control of the rotating structure size of a roller crane, in particular to a process for controlling the rotating structure size of the roller crane.
Background
The rotary chassis comprises a counter roller structure, a rotary chassis main structure, a weight box, a rotary mechanism, a truss frame and pouring weights; total weight of total rotary chassis assembly is about 1950T; the order of installation and the arrangement of the jig frame relate to the installation accuracy of the overall size, and therefore, in order to ensure the installation accuracy of the swing structure of the roller crane, it is necessary to control the installation gears at the respective positions stepwise to achieve the overall size accuracy control of the swing structure.
Disclosure of Invention
The invention aims to solve the technical problem of providing a size control process for a roller crane rotating structure, which can solve the problem of large size error of a common roller crane rotating structure after installation.
In order to solve the technical problems, the technical scheme of the invention is as follows: the size control process of the rotary structure of the roller crane has the innovation points that: the specific control process is as follows:
s1: manufacturing tolerance requirements of the rotary chassis and the lower support are as follows: the distance H from the upper surface of the support frame of the rotary chassis mechanism to the reference surface of the rotary chassis meets negative tolerance 0 to-3; the flatness of the front roller track beam of the rotary chassis after welding is less than 10mm; the distance H between the machining surface of the track beam of the rotary chassis and the machining surface of the center seat meets the tolerance + -1.5;
s2: assembling a central beam: drawing a central cross line of a central beam on the ground, drawing out the central cross line, drawing out the central line of each component by taking the central cross line as a reference, and then arranging the cylinder jig frames in place in sequence; placing each component of the central beam on a cylinder jig frame, and adjusting the levelness and the verticality of the component by taking the bottom plane of the central beam as a reference, wherein the levelness is less than or equal to 3mm, and the verticality is less than or equal to 2mm; marking out a residual trimming line at the joint of the components by taking the central line of the central beam as a reference, and trimming and removing the residual trimming line; after ensuring that the gap size between the components meets the requirement, positioning the spot welding clamp code at the joint of the components, and correcting the interface between the components, thereby ensuring that the interface is intact; after the processing line of the track surface of the roller is drawn, positioning the installation center seat;
s3: auxiliary strip beams and front-back rotary support beams are assembled: drawing out a mounting position line of the spoke beam and the front and back rotary supporting beams by taking the cross center line of the central cross beam as a reference; placing the bottom plates of all the assemblies upwards on a cylinder jig frame, and adjusting the level and the verticality of all the assemblies by taking the central cross line of a central cross beam as a reference, wherein the levelness is less than or equal to 3mm, and the verticality is less than or equal to 2mm; marking out a residual trimming line at the joint of each component, trimming and cutting to remove, trimming and cutting a welding groove at the joint; retesting levelness and verticality of each component, correcting and adjusting the size and the position of each component by taking a central cross line of a central cross beam as a reference, positioning a spot welding clamp code at the joint of the components, and temporarily avoiding welding butt welding seams; the distance H from the upper surface of the support frame of the rotary chassis mechanism to the reference surface of the rotary chassis meets negative tolerance 0 to-3;
s4: assembling a main structure of the rotary chassis: marking out the installation position line of each component of the main structure of the rotary chassis by taking the cross center line of the central beam as a reference; placing the bottom plates of all the assemblies upwards on a cylinder jig frame, and adjusting the level and the verticality of all the assemblies by taking the central cross line of a central cross beam as a reference, wherein the levelness is less than or equal to 3mm, and the verticality is less than or equal to 2mm; marking out a residual trimming line at the joint of each component, trimming and cutting to remove, trimming and cutting a welding groove at the joint; retesting levelness and verticality of each component, correcting and adjusting the size and the position of each component by taking a central cross line of a central cross beam as a reference, positioning spot welding clamp codes at the connecting positions of the components, and respectively welding butt welding seams; the flatness of the front roller track beam of the rotary chassis after welding is less than 10mm;
s5: assembling front and rear rail bearing beams and central shaft connecting plates: placing the bottom plates of all the components of the bearing rail beam upwards on a main structure of the rotary chassis, and marking off and trimming allowance by taking a central cross line of a central cross beam as a reference so as to ensure that each baffle plate of the bearing rail beam corresponds to the inner rib plate of the rotary chassis one by one; a welding groove is formed at the butt joint position; retesting the levelness and verticality of the front and rear rail bearing beams, wherein the required planeness is less than or equal to 3mm, and the verticality is less than or equal to 1.5mm; correcting and adjusting the positions of the components by taking the central cross line of the central cross beam as a reference, and then welding according to the blueprint requirement; after welding, firstly drawing a allowance machining line of the bearing rail surface, positioning a welding center seat by taking the allowance machining line as a reference, and ensuring that the flatness of the machining surface of the bearing rail beam and the machining surface of the center seat is controlled within +/-1.5;
s6: preparing by machining: before the bearing rail surface is processed, the rotary chassis is lifted 5 cm to 10cm away from the tire, and the stress is released; adjusting the horizontal of the rotary chassis and drawing a cross center line of the rotary chassis by taking a machining plane of a central shaft connecting plate machine of the rotary chassis as a reference, and retesting a plane machining line of a bearing rail surface; marking out a track inspection round line according to the requirements in the process of marking out the track of the process single roller and the mounting process;
s7: machining: after the rechecking processing tool is horizontal, the thickness allowance of the front bearing rail beam and the rear bearing rail beam is processed according to the requirement; during machining, multiple measurements are needed, flatness measurement is needed for each cutting, if accidents are found in the machining process, the number of measurements is increased, the final measurement result is ensured to meet the requirement of a drawing, the flatness is not more than 1mm/1m of the circumferential length, the track mounting area is required to meet 0.2mm/300mm along the width direction of the track, the maximum height difference of the whole circle is not more than 3mm, the track mounting area is not allowed to have cutter marks, and the rest of machining surfaces are carried out according to the requirement of a blueprint; drawing a positive roller installation position line by taking the center of the rotary chassis as a reference, wherein the diameter tolerance is +/-3 mm, and the radius tolerance is +/-2 mm; and taking the upper surface of the machined rail bearing beam as a reference, knocking a sample punching mark on the side surface of the rotary chassis, wherein the size is 2000mm, and the sample punching mark is used as a height reference for the subsequent truss frame installation.
The invention has the advantages that:
1) In each step, the precision is required to be controlled within a reasonable range, and the dimensional precision control of the rotating structure is realized when the rotating structure of the crane is finally installed; the step of installing the gradual detection control precision reduces the assembly efficiency compared with the final detection installation mode, but ensures the precision requirement, thereby reducing the reworking and finishing probability.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a diagram showing a forming state of a dimension control process of a revolving structure of a roller crane according to the present invention.
Fig. 2 to 6 are key technical diagrams for forming a size control process of a revolving structure of a roller crane according to the present invention.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The size control process of the revolving structure of the roller crane shown in fig. 1 to 6 comprises the following specific control processes:
s1: manufacturing tolerance requirements of the rotary chassis and the lower support are as follows: the distance H from the upper surface of the support frame of the rotary chassis mechanism to the reference surface of the rotary chassis meets negative tolerance 0 to-3; the flatness of the front roller track beam of the rotary chassis after welding is less than 10mm; the distance H between the machining surface of the track beam of the rotary chassis and the machining surface of the center seat meets the tolerance + -1.5;
s2: assembling a central beam: drawing a central cross line of a central beam on the ground, drawing out the central cross line, drawing out the central line of each component by taking the central cross line as a reference, and then arranging the cylinder jig frames in place in sequence; placing each component of the central beam on a cylinder jig frame, and adjusting the levelness and the verticality of the component by taking the bottom plane of the central beam as a reference, wherein the levelness is less than or equal to 3mm, and the verticality is less than or equal to 2mm; marking out a residual trimming line at the joint of the components by taking the central line of the central beam as a reference, and trimming and removing the residual trimming line; after ensuring that the gap size between the components meets the requirement, positioning the spot welding clamp code at the joint of the components, and correcting the interface between the components, thereby ensuring that the interface is intact; after the processing line of the track surface of the roller is drawn, positioning the installation center seat;
s3: auxiliary strip beams and front-back rotary support beams are assembled: drawing out a mounting position line of the spoke beam and the front and back rotary supporting beams by taking the cross center line of the central cross beam as a reference; placing the bottom plates of all the assemblies upwards on a cylinder jig frame, and adjusting the level and the verticality of all the assemblies by taking the central cross line of a central cross beam as a reference, wherein the levelness is less than or equal to 3mm, and the verticality is less than or equal to 2mm; marking out a residual trimming line at the joint of each component, trimming and cutting to remove, trimming and cutting a welding groove at the joint; retesting levelness and verticality of each component, correcting and adjusting the size and the position of each component by taking a central cross line of a central cross beam as a reference, positioning a spot welding clamp code at the joint of the components, and temporarily avoiding welding butt welding seams; the distance H from the upper surface of the support frame of the rotary chassis mechanism to the reference surface of the rotary chassis meets negative tolerance 0 to-3;
s4: assembling a main structure of the rotary chassis: marking out the installation position line of each component of the main structure of the rotary chassis by taking the cross center line of the central beam as a reference; placing the bottom plates of all the assemblies upwards on a cylinder jig frame, and adjusting the level and the verticality of all the assemblies by taking the central cross line of a central cross beam as a reference, wherein the levelness is less than or equal to 3mm, and the verticality is less than or equal to 2mm; marking out a residual trimming line at the joint of each component, trimming and cutting to remove, trimming and cutting a welding groove at the joint; retesting levelness and verticality of each component, correcting and adjusting the size and the position of each component by taking a central cross line of a central cross beam as a reference, positioning spot welding clamp codes at the connecting positions of the components, and respectively welding butt welding seams; the flatness of the front roller track beam of the rotary chassis after welding is less than 10mm;
s5: assembling front and rear rail bearing beams and central shaft connecting plates: placing the bottom plates of all the components of the bearing rail beam upwards on a main structure of the rotary chassis, and marking off and trimming allowance by taking a central cross line of a central cross beam as a reference so as to ensure that each baffle plate of the bearing rail beam corresponds to the inner rib plate of the rotary chassis one by one; a welding groove is formed at the butt joint position; retesting the levelness and verticality of the front and rear rail bearing beams, wherein the required planeness is less than or equal to 3mm, and the verticality is less than or equal to 1.5mm; correcting and adjusting the positions of the components by taking the central cross line of the central cross beam as a reference, and then welding according to the blueprint requirement; after welding, firstly drawing a allowance machining line of the bearing rail surface, positioning a welding center seat by taking the allowance machining line as a reference, and ensuring that the flatness of the machining surface of the bearing rail beam and the machining surface of the center seat is controlled within +/-1.5;
s6: preparing by machining: before the bearing rail surface is processed, the rotary chassis is lifted 5 cm to 10cm away from the tire, and the stress is released; adjusting the horizontal of the rotary chassis and drawing a cross center line of the rotary chassis by taking a machining plane of a central shaft connecting plate machine of the rotary chassis as a reference, and retesting a plane machining line of a bearing rail surface; marking out a track inspection round line according to the requirements in the process of marking out the track of the process single roller and the mounting process;
s7: machining: after the rechecking processing tool is horizontal, the thickness allowance of the front bearing rail beam and the rear bearing rail beam is processed according to the requirement; during machining, multiple measurements are needed, flatness measurement is needed for each cutting, if accidents are found in the machining process, the number of measurements is increased, the final measurement result is ensured to meet the requirement of a drawing, the flatness is not more than 1mm/1m of the circumferential length, the track mounting area is required to meet 0.2mm/300mm along the width direction of the track, the maximum height difference of the whole circle is not more than 3mm, the track mounting area is not allowed to have cutter marks, and the rest of machining surfaces are carried out according to the requirement of a blueprint; drawing a positive roller installation position line by taking the center of the rotary chassis as a reference, wherein the diameter tolerance is +/-3 mm, and the radius tolerance is +/-2 mm; and taking the upper surface of the machined rail bearing beam as a reference, knocking a sample punching mark on the side surface of the rotary chassis, wherein the size is 2000mm, and the sample punching mark is used as a height reference for the subsequent truss frame installation.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A size control process of a rotary structure of a roller crane is characterized by comprising the following steps of: the specific control process is as follows:
s1: manufacturing tolerance requirements of the rotary chassis and the lower support are as follows: the distance H from the upper surface of the support frame of the rotary chassis mechanism to the reference surface of the rotary chassis meets negative tolerance 0 to-3; the flatness of the front roller track beam of the rotary chassis after welding is less than 10mm; the distance H between the machining surface of the track beam of the rotary chassis and the machining surface of the center seat meets the tolerance + -1.5;
s2: assembling a central beam: drawing a central cross line of a central beam on the ground, drawing out the central cross line, drawing out the central line of each component by taking the central cross line as a reference, and then arranging the cylinder jig frames in place in sequence; placing each component of the central beam on a cylinder jig frame, and adjusting the levelness and the verticality of the component by taking the bottom plane of the central beam as a reference, wherein the levelness is less than or equal to 3mm, and the verticality is less than or equal to 2mm; marking out a residual trimming line at the joint of the components by taking the central line of the central beam as a reference, and trimming and removing the residual trimming line; after ensuring that the gap size between the components meets the requirement, positioning the spot welding clamp code at the joint of the components, and correcting the interface between the components, thereby ensuring that the interface is intact; after the processing line of the track surface of the roller is drawn, positioning the installation center seat;
s3: auxiliary strip beams and front-back rotary support beams are assembled: drawing out a mounting position line of the spoke beam and the front and back rotary supporting beams by taking the cross center line of the central cross beam as a reference; placing the bottom plates of all the assemblies upwards on a cylinder jig frame, and adjusting the level and the verticality of all the assemblies by taking the central cross line of a central cross beam as a reference, wherein the levelness is less than or equal to 3mm, and the verticality is less than or equal to 2mm; marking out a residual trimming line at the joint of each component, trimming and cutting to remove, trimming and cutting a welding groove at the joint; retesting levelness and verticality of each component, correcting and adjusting the size and the position of each component by taking a central cross line of a central cross beam as a reference, positioning a spot welding clamp code at the joint of the components, and temporarily avoiding welding butt welding seams; the distance H from the upper surface of the support frame of the rotary chassis mechanism to the reference surface of the rotary chassis meets negative tolerance 0 to-3;
s4: assembling a main structure of the rotary chassis: marking out the installation position line of each component of the main structure of the rotary chassis by taking the cross center line of the central beam as a reference; placing the bottom plates of all the assemblies upwards on a cylinder jig frame, and adjusting the level and the verticality of all the assemblies by taking the central cross line of a central cross beam as a reference, wherein the levelness is less than or equal to 3mm, and the verticality is less than or equal to 2mm; marking out a residual trimming line at the joint of each component, trimming and cutting to remove, trimming and cutting a welding groove at the joint; retesting levelness and verticality of each component, correcting and adjusting the size and the position of each component by taking a central cross line of a central cross beam as a reference, positioning spot welding clamp codes at the connecting positions of the components, and respectively welding butt welding seams; the flatness of the front roller track beam of the rotary chassis after welding is less than 10mm;
s5: assembling front and rear rail bearing beams and central shaft connecting plates: placing the bottom plates of all the components of the bearing rail beam upwards on a main structure of the rotary chassis, and marking off and trimming allowance by taking a central cross line of a central cross beam as a reference so as to ensure that each baffle plate of the bearing rail beam corresponds to the inner rib plate of the rotary chassis one by one; a welding groove is formed at the butt joint position; retesting the levelness and verticality of the front and rear rail bearing beams, wherein the required planeness is less than or equal to 3mm, and the verticality is less than or equal to 1.5mm; correcting and adjusting the positions of the components by taking the central cross line of the central cross beam as a reference, and then welding according to the blueprint requirement; after welding, firstly drawing a allowance machining line of the bearing rail surface, positioning a welding center seat by taking the allowance machining line as a reference, and ensuring that the flatness of the machining surface of the bearing rail beam and the machining surface of the center seat is controlled within +/-1.5;
s6: preparing by machining: before the bearing rail surface is processed, the rotary chassis is lifted 5 cm to 10cm away from the tire, and the stress is released; adjusting the horizontal of the rotary chassis and drawing a cross center line of the rotary chassis by taking a machining plane of a central shaft connecting plate machine of the rotary chassis as a reference, and retesting a plane machining line of a bearing rail surface; marking out a track inspection round line according to the requirements in the process of marking out the track of the process single roller and the mounting process;
s7: machining: after the rechecking processing tool is horizontal, the thickness allowance of the front bearing rail beam and the rear bearing rail beam is processed according to the requirement; during machining, multiple measurements are needed, flatness measurement is needed for each cutting, if accidents are found in the machining process, the number of measurements is increased, the final measurement result is ensured to meet the requirement of a drawing, the flatness is not more than 1mm/1m of the circumferential length, the track mounting area is required to meet 0.2mm/300mm along the width direction of the track, the maximum height difference of the whole circle is not more than 3mm, the track mounting area is not allowed to have cutter marks, and the rest of machining surfaces are carried out according to the requirement of a blueprint; drawing a positive roller installation position line by taking the center of the rotary chassis as a reference, wherein the diameter tolerance is +/-3 mm, and the radius tolerance is +/-2 mm; and taking the upper surface of the machined rail bearing beam as a reference, knocking a sample punching mark on the side surface of the rotary chassis, wherein the size is 2000mm, and the sample punching mark is used as a height reference for the subsequent truss frame installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310971520.6A CN116812788A (en) | 2023-08-03 | 2023-08-03 | Roller crane revolution structure size control process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310971520.6A CN116812788A (en) | 2023-08-03 | 2023-08-03 | Roller crane revolution structure size control process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116812788A true CN116812788A (en) | 2023-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310971520.6A Pending CN116812788A (en) | 2023-08-03 | 2023-08-03 | Roller crane revolution structure size control process |
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| Country | Link |
|---|---|
| CN (1) | CN116812788A (en) |
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2023
- 2023-08-03 CN CN202310971520.6A patent/CN116812788A/en active Pending
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