CN107695550B - Processing method of truss type arm support - Google Patents

Processing method of truss type arm support Download PDF

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Publication number
CN107695550B
CN107695550B CN201710763671.7A CN201710763671A CN107695550B CN 107695550 B CN107695550 B CN 107695550B CN 201710763671 A CN201710763671 A CN 201710763671A CN 107695550 B CN107695550 B CN 107695550B
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China
Prior art keywords
line
arm support
main
support
arm
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CN201710763671.7A
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Chinese (zh)
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CN107695550A (en
Inventor
方松
杨新明
熊祥
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Wuhan Marine Machinery Plant Co Ltd
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Wuhan Marine Machinery Plant Co Ltd
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Priority to CN201710763671.7A priority Critical patent/CN107695550B/en
Publication of CN107695550A publication Critical patent/CN107695550A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426Fixtures for other work
    • B23K37/0435Clamps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/62Constructional features or details
    • B66C23/64Jibs

Abstract

the invention discloses a method for processing a truss type arm support. The processing method of the truss type arm support comprises the following steps: the method comprises the steps of processing and forming a truss type arm frame, disconnecting an arm frame head section and an arm frame middle section of the processed and formed truss type arm frame, installing a first connecting structure on the arm frame head section, installing a second connecting structure matched with the first connecting structure on the arm frame middle section, enabling the arm frame middle section to be disconnected with an arm frame tail section, installing the first connecting structure on the arm frame middle section, installing the second connecting structure on the arm frame tail section, disconnecting the arm frame middle section into at least two sections, and installing the first connecting structure and the second connecting structure on the arm frame middle section of each section. The method changes the truss type arm support into a detachable structure, and the detachable truss type arm support is convenient to transport.

Description

Processing method of truss type arm support
Technical Field
The invention relates to the field of boom processing methods, in particular to a processing method of a truss type boom.
background
the truss type arm support is a very key component in the marine crane, and is large in stress and complex in stress, so that the truss type arm support member plays a decisive role in the quality reliability, stability and service life of the whole marine crane. This also makes the manufacturing accuracy requirements of the truss-like boom member very high.
the conventional truss type arm support is of a sectional type structure, and the sectional type truss type arm support mainly comprises an auxiliary arm, a main lifting support, an arm support head section, an arm support middle section and an arm support tail section. The auxiliary arm, the arm frame head section, the arm frame middle section and the arm frame tail section are all formed by welding four main pipes and a plurality of branch pipes, and the formed truss type arm frame is long and inconvenient to transport, so that the use of the truss type arm frame is influenced.
Disclosure of Invention
in order to solve the problem that the truss type arm support is long and inconvenient to transport in the prior art, the embodiment of the invention provides a method for processing the truss type arm support. The technical scheme is as follows:
the invention provides a processing method of a truss type arm support, which comprises the following steps: processing and forming the truss type arm support, comprising: drawing a first contour line of a plurality of main pipes of a single-piece arm support on two sides of the truss-type arm support, wherein the main pipes of the single-piece arm support comprise two arm support head section main pipes, two arm support middle section main pipes and two arm support tail section main pipes;
drawing a central line between two adjacent branch pipes of the single-piece arm support;
arranging a jig frame on the first contour line, arranging a plurality of main pipes of each single arm support according to the first contour line, and respectively clamping the main pipes on the jig frame;
respectively assembling a plurality of branch pipes of each single-piece arm support to the corresponding main pipes according to the center line between the two adjacent branch pipes, and welding the main pipes together to obtain the assembled single-piece arm support;
Drawing a second contour line of the main pipe when the two single-piece arm supports are folded;
drawing a central line between two adjacent folding branch pipes when the two single-piece arm frames are folded;
Arranging the jig frame on the second contour line;
Arranging the two assembled single-piece arm supports on the jig frame according to the second contour lines respectively, and fixing the two single-piece arm supports through clamping tools respectively;
assembling the folded branch pipes between the two single-piece arm frames according to the central line between the two adjacent folded branch pipes;
Assembling a boom root support and a main lifting pulley support on the single boom;
assembling an auxiliary arm on the head section of the arm support to obtain a machined and molded truss type arm support;
disconnecting the boom head section and the boom middle section of the machined and molded truss type boom, mounting a first connecting structure on the boom head section, and mounting a second connecting structure matched with the first connecting structure on the boom middle section, so that the boom head section and the boom middle section are detachably connected through the first connecting structure and the second connecting structure;
disconnecting the middle arm support section from the tail arm support section, mounting the first connecting structure on the middle arm support section, and mounting the second connecting structure on the tail arm support section, so that the middle arm support section and the tail arm support section are detachably connected through the first connecting structure and the second connecting structure;
The middle section of the arm support is cut into at least two sections, the first connecting structure and the second connecting structure are arranged on each section of the middle section of the arm support, so that the two adjacent middle sections of the arm support are detachably connected through the first connecting structure and the second connecting structure,
Drawing a first contour line of a main pipe of the single-piece arm support on two sides of the truss-type arm support, wherein the first contour line comprises the following steps:
Drawing a connecting line between the tail section of the arm support and the middle section of the arm support as a first datum line;
respectively drawing a termination line of the boom tail section, a connecting line of the boom middle section and the boom head section and a termination line of the boom head section by taking the first reference line as a reference;
Drawing a center line of the single-piece arm support in the length direction, and taking the center line as a second reference line;
respectively drawing end points E1 and F1 at one ends of center lines of two main pipes of the arm support tail section on the termination lines of the arm support tail section on two sides of the second reference line by taking the second reference line as a reference;
Respectively drawing the end points E2 and F2 of the center lines of the two main pipes of the boom tail section on the first reference line at the two sides of the second reference line by taking the second reference line as a reference;
respectively drawing end points E3 and F3 of center lines of two main pipes of the arm support head section on a connecting line of the arm support middle section and the arm support head section on two sides of the second reference line by taking the second reference line as a reference;
respectively drawing end points E4 and F4 at the other ends of the center lines of the two main pipes of the arm frame head section on the termination lines of the arm frame head section on the two sides of the second reference line by taking the second reference line as a reference;
Connecting E1, E2, E3 and E4, and connecting F1, F2, F3 and F4 to obtain the center line of the main pipe of the single-piece arm support;
And drawing a first contour line of the main pipe of the single-piece arm support according to the center line of the main pipe of the single-piece arm support.
further, the method further comprises: and respectively offsetting the central line of the main pipe of the single-piece arm support to two sides, and then drawing two first contour lines of the main pipe of the single-piece arm support, wherein the distances of the central line of the main pipe of the single-piece arm support to the two sides are the corresponding radiuses of the main pipe.
specifically, the drawing the center line between two adjacent branch pipes of the single-piece arm support includes:
and respectively drawing a central line between the two adjacent branch pipes by taking the first reference line and a connecting line between the middle section of the arm support and the head section of the arm support as references.
specifically, the assembling the branch pipe of each single-piece arm support to the main pipe according to the center line of the branch pipe comprises:
Arranging a main pipe of the single-piece arm support on a cross beam of the branch pipe positioning tool;
finding out intersection points of the outer walls of the two ends of the branch pipes and the main pipe respectively according to the central line between the two adjacent branch pipes, wherein the intersection points are an E point and an F point respectively;
arranging the branch pipe on a support plate of the branch pipe positioning tool, and enabling the central line of the branch pipe and the central line of the main pipe to be located in the same plane;
attaching a positioning plate to the outer wall of one end of the branch pipe, and abutting one end of the positioning plate against the point E;
attaching the positioning plate to the outer wall of the other end of the branch pipe, enabling one end of the positioning plate to abut against the point F 'of the main pipe, and measuring the distance d from the point F' to the point F;
and after the branch pipe is moved to the direction of the point F by d/2, welding two ends of the branch pipe to the main pipe respectively.
Specifically, the middle of the main pipe corresponding to the branch pipe to both ends of the corresponding main pipe are sequentially fitted to the main pipe.
In particular, said arranging said jig frame on said second profile line comprises:
and bypassing a plumb line around the main pipe, and enabling a plumb hammer on the plumb line to be positioned on the second contour line.
Specifically, the assembling of the arm support root support and the main hoisting wheel support slide seat on the single-piece arm support includes:
two ends of two tool dummy shafts are respectively clamped in two shaft holes of a first partition plate and a second partition plate of the main lifting wheel supporting slide seat;
two ends of the other two tool dummy shafts are respectively clamped in two shaft holes of a third partition plate and a fourth partition plate of the main lifting wheel supporting slide seat;
Connecting the second partition plate and the third partition plate through channel steel to obtain an assembled main lifting wheel support sliding seat;
and assembling the main lifting wheel support sliding seat to a main pipe of the single-piece arm support.
Specifically, the assembling of the boom root support and the main hoisting pulley support on the single boom further includes:
Drawing the center line of the shaft sleeve of the support at the root of the arm support by taking the first datum line as a reference;
And arranging a plumb line at the top point of the shaft sleeve of the support at the root part of the arm support, and enabling a plumb hammer on the plumb line to be positioned on the central line of the shaft sleeve.
Specifically, the method further comprises: and supporting rods are respectively welded between the two disconnected main pipes.
the technical scheme provided by the embodiment of the invention has the following beneficial effects: the method comprises the steps of disconnecting a boom head section and a boom middle section of a machined and formed truss type boom, disconnecting the boom middle section and the boom tail section, and disconnecting the boom middle section into at least two sections, wherein the boom head section and the boom middle section, the boom middle section and the boom tail section and the multiple sections of boom middle sections are detachably connected through second connecting structures matched with each other at two ends of a disconnected position through a first connecting structure and a first connecting structure respectively, so that the truss type boom is changed into a detachable structure, and the detachable truss type boom is convenient to transport. Meanwhile, the processing method is used for disconnecting the processed and formed truss type arm support, is simple and high in efficiency, can carry out batch biochemistry, and is small in internal stress and welding deformation of the processed truss type arm support.
Drawings
in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a broken truss-type boom according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a first connection structure and a second connection structure provided by an embodiment of the present invention;
FIG. 3 is a schematic top view of a first connection structure and a second connection structure provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a single-piece arm support according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a first contour line according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a centerline provided by an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a card board provided in an embodiment of the present invention;
FIG. 8 is a schematic diagram of a first contour line and a plumb line according to an embodiment of the present invention;
FIG. 9 is a schematic structural view of a branch pipe provided in an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a pipe positioning tool according to an embodiment of the present invention;
FIG. 11 is a schematic side view of the structure of FIG. 10 according to an embodiment of the present invention;
FIG. 12 is a schematic top view of the structure of FIG. 10 according to an embodiment of the present invention;
FIG. 13 is a schematic view of an assembly structure of a branch pipe and a main pipe according to an embodiment of the present invention;
FIG. 14 is a schematic view illustrating an operating state of a positioning plate according to an embodiment of the present invention;
FIG. 15 is a schematic view of the structure shown in FIG. 14 and taken along line B in accordance with an embodiment of the present invention;
FIG. 16 is a schematic illustration of a second contour line provided by an embodiment of the present invention;
FIG. 17 is a schematic view of a plumb line and main pipe fitting configuration according to an embodiment of the present invention;
Fig. 18 is a schematic view of a matching structure of a jig frame and two single-piece arm supports according to an embodiment of the present invention;
fig. 19 is a schematic structural diagram of a clamping tool provided in an embodiment of the present invention;
FIG. 20 is a schematic structural view of a closed leg according to an embodiment of the present invention;
Fig. 21 is a schematic structural diagram of assembly of a tool dummy shaft and a main lifting wheel support sliding seat provided by the embodiment of the invention;
FIG. 22 is a schematic view of the centerline of a bushing provided in accordance with an embodiment of the present invention;
FIG. 23 is a schematic view of a sleeve according to an embodiment of the present invention in engagement with a plumb line;
fig. 24 is a schematic structural view of the first connecting plate and the secondary arm main tube according to the embodiment of the present invention.
Detailed Description
in order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Examples
The embodiment of the invention provides a processing method of a truss type arm support, which comprises the following steps: the truss type arm frame is processed and formed, as shown in fig. 1, an arm frame head section 1 of the processed and formed truss type arm frame is disconnected with an arm frame middle section 2, the arm frame middle section 2 is disconnected with an arm frame tail section 5, and the arm frame middle section 2 is disconnected into at least two sections. Fig. 2 and fig. 3 are schematic structural diagrams of a first connection structure and a second connection structure provided in an embodiment of the present invention, respectively. Fig. 4 is a schematic view of an assembly structure of the machined truss-type boom and the first connecting structure and the second connecting structure. As shown in fig. 2 to 4, a first connecting structure 3 is installed on a boom head section 1, a second connecting structure 4 matched with the first connecting structure 3 is installed on a boom middle section 2, the boom head section 1 and the boom middle section 2 are detachably connected through the first connecting structure 3 and the second connecting structure 4, the first connecting structure 3 is installed on the boom middle section 2, the second connecting structure 4 is installed on a boom tail section 5, the boom middle section 2 and the boom tail section 5 are detachably connected through the first connecting structure 3 and the second connecting structure 4, the first connecting structure 3 and the second connecting structure 4 are installed on each section of the boom middle section 2, and two adjacent boom middle sections 5 are detachably connected through the first connecting structure 3 and the second connecting structure 4. The single-piece arm support comprises two main pipes of the arm support head section 1, two main pipes of the arm support middle section 2, two main pipes of the arm support tail section 5 and a plurality of branch pipes 10 welded between the two corresponding main pipes 8.
in this embodiment, as shown in fig. 2 and fig. 3, both the first connection structure 3 and the second connection structure 4 may be ear plates, and the first connection structure 3 and the second connection structure 4 are detachably connected by a pin 6. In other embodiments, the first connecting structure 3 and the second connecting structure 4 may also be steel plates with bolt holes, and the first connecting structure 3 and the second connecting structure 4 are connected by bolts.
In this embodiment, the boom middle section 2 may be two sections, and the number of the sections of the boom middle section 2 may be set to be appropriate according to the transportation situation. When the cutting is carried out, cutting is carried out in a flame cutting mode; and cutting a welding groove by adopting semi-automatic flame cutting equipment after cutting, wherein the tolerance of the angle of the groove is less than 3 degrees, and the root truncated edge is 0-2 mm. And welding a joint at each cutting position.
Specifically, the method may further include: support rods 30 are welded between the two main pipes 8 that are disconnected (see fig. 4). The support rod 30 can ensure the stress capacity of the broken part.
specifically, the truss type arm support is processed and formed, and the method comprises the following steps:
the method for processing and molding the truss type arm support comprises the following steps: fig. 5 is a schematic structural diagram of the first contour line. With reference to fig. 4 and 5, a first contour line 9 of the main pipe 8 of the single boom 7 on both sides of the truss boom is drawn. Specifically, a connecting line between the boom tail section 5 and the boom middle section 2 is drawn as a first reference line 15.
and drawing a termination line of the boom tail section 5, a connecting line of the boom middle section 2 and the boom head section 1 and a termination line of the boom head section 1 respectively by taking the first reference line 15 as a reference. In this embodiment, the first reference line 15 is deviated to the left by 5573mm as the terminal line of the boom tail section 5, the first reference line 15 is deviated to the right by 27952mm as the terminal line of the boom middle section 2, and the first reference line 15 is deviated to the right by 37445mm as the terminal line of the boom head section 1.
And drawing a center line of the single arm support 7 in the length direction, and taking the center line as a second reference line 16.
Respectively drawing end points E1 and F1 at one ends of center lines of two main pipes of the arm support tail section 5 on the termination lines of the arm support tail section 5 at two sides of the second reference line 16 by taking the second reference line 16 as a reference; in the present embodiment, the distances from the second reference line 16 to the E1 and the F1 are both 350 mm.
respectively drawing other end points E2 and F2 of the center lines of the two main pipes 8 of the arm support tail section 5 on the first reference lines 15 on two sides of the second reference line 16 by taking the second reference line 16 as a reference; in the present embodiment, the distances from the second reference line 16 to the E2 and the F2 are both 1100 mm.
Respectively drawing end points E3 and F3 of center lines of two main pipes of the arm frame head section 1 on a connecting line of the arm frame middle section 2 and the arm frame head section 1 on two sides of the second reference line 16 by taking the second reference line 16 as a reference;
Respectively drawing other end points E4 and F4 of center lines of two main pipes of the arm frame head section 1 on the termination lines of the arm frame head section 1 at two sides of the second reference line 16 by taking the second reference line 16 as a reference; in the present embodiment, the distances from the second reference line 16 to the E4 and the F4 are both 450 mm.
the connections E1, E2, E3 and E4, and F1, F2, F3 and F4, result in the centre line of the main tube 8 of the single-piece arm support 7.
and drawing a first contour line 9 of the main pipe 8 of the single-piece arm support 7 according to the center line of the main pipe 8 of the single-piece arm support 7. In this embodiment, the two first contour lines 9 of the main pipe 8 of the single-piece boom 7 are obtained by shifting the center line of the main pipe 8 by 101.5mm (the distance is the radius of the corresponding main pipe 8) inward and outward respectively.
further, fig. 6 is a schematic structural diagram of a center line according to an embodiment of the present invention. Referring to fig. 1 and 6, a center line 11 between two adjacent branch pipes 10 of the single-piece arm support 7 is drawn. Specifically, the center line 11 between two adjacent branch pipes 10 is drawn by taking the first reference line 15 and the connecting line 31 between the boom middle section 2 and the boom head section 1 as references. In this embodiment, on the boom head section 1, the center line 11 between two adjacent branch pipes 10 respectively translates 1405/1160/990/752mm from right to left the first reference line 15. On the middle section 2 of the arm support, a central line 11 between two adjacent branch pipes 10 respectively translates 1477/1320/1320/1396/1396/1320/1233mm from left to right the first reference line 15. On the tail section 5 of the arm support, a central line 11 between two adjacent branch pipes 10 respectively translates a connecting line 31 between the middle section 2 of the arm support and the head section 1 of the arm support from left to right by 1240/1170/1090/1020/950/890/300 mm.
further, a jig 12 (see fig. 8 and 18) is arranged on the first contour line 9, and the plurality of main tubes 8 of each one-piece arm 7 are respectively clamped on the jig 12 in accordance with the first contour line 9. Fig. 7 is a schematic structural diagram of a card board provided in an embodiment of the invention. As shown in fig. 7, when the main pipe 8 is clamped, the clamping plate 19 may be used to clamp the main pipe 8 to the jig 12, and the clamping plate 19 may be composed of three plates and clamp the left and right sides of the main pipe 8. Fig. 8 is a schematic view of a matching structure of the first contour line and the vertical line. As shown in fig. 8, a plumb line 17 may be used to place the jig frame 12 on the first contour line 9. In particular, the plumb line 17 is passed around the main pipe 8, and the plumb on the plumb line 17 is located on the first contour line 9. The precise arrangement of the main tube 8 according to the first contour line 9 can be ensured by the plumb line 17. It is generally required that the plumb on the plumb line 17 deviates from the first contour line 9 by less than 1 mm.
Further, fig. 9 is a schematic structural diagram of a welding sequence of the branch pipes according to the embodiment of the present invention. Referring to fig. 6 and 9, a plurality of branch pipes 10 of each single-piece arm support 7 are respectively assembled to corresponding main pipes 8 according to a central line 11 between two adjacent branch pipes 10, and the plurality of main pipes 8 are welded together to obtain the assembled single-piece arm support 7. Specifically, fig. 10 to 12 are schematic structural diagrams of the branch pipe positioning tool, respectively. As shown in fig. 10 to 12, the main pipe 8 of the single-piece arm frame 7 is arranged on the cross member 33a of the branch pipe positioning tool 33. Fig. 13 is a schematic view of an assembly structure of a branch pipe and a main pipe according to an embodiment of the present invention. As shown in fig. 13, the intersection points of the outer walls of the two ends of the branch pipe 10 and the main pipe 8 (in this embodiment, the distance between the intersection point and the center line 11 between the two adjacent branch pipes 10 should be 50mm theoretically) are found based on the center line 11 between the two adjacent branch pipes 10, and the intersection points are point E and point F, respectively, and the branch pipes 10 are arranged on the support plate 33b of the branch pipe positioning tool 33 so that the center lines of the branch pipes 10 and the center line of the main pipe 8 are located in the same plane. Fig. 14 and 15 are schematic views respectively illustrating working states of the positioning plate according to the embodiment of the present invention. As shown in fig. 14 and 15, a positioning plate 18 is attached to the outer wall of one end of the branch pipe 10, and one end of the positioning plate 18 is abutted against point E (theoretical intersection). In this embodiment, the positioning plate may be a steel ruler. Attaching a positioning plate 18 to the outer wall of the other end of the branch pipe 10, enabling one end of the positioning plate 18 to abut against the point F 'of the main pipe 8, and measuring the distance d from the point F' to the point F; after the branch pipe 10 is moved by d/2 in the direction of point F, both ends of the branch pipe 10 are welded to the main pipe 8, respectively. In general, in the machining process, due to accumulated errors and the like, the probability that the other end of the branch pipe 10 coincides with the point F is small, a certain distance d exists between the point F' and the point F, in this embodiment, d is required to be greater than or equal to 0 and less than or equal to 10mm, and the accumulated errors at this time need to be evenly distributed to two ends of the branch pipe 10, that is, the whole branch pipe 10 needs to be translated by a distance of d/2 in the direction of the point F. In implementation, as shown in fig. 10, a spacer 33c may be disposed on the cross beam 33a of the branch pipe positioning tool 33, and the main pipe 8 may be disposed on the spacer 33c, so as to prevent the main pipe 8 from being damaged due to rigid contact between the main pipe 8 and the cross beam 33 a. In the present embodiment, as shown in fig. 10 to 12, the branch pipe positioning tool 33 includes a cross beam 33a and a support plate 33b, and the two support plates 33b are mounted in parallel on one side of the cross beam 33 a. The beam 33a is used for placing the main pipe 8 and may be an L-shaped channel steel. The support plate 33b may include a first support plate and a second support plate, the bottom of the first support plate being vertically mounted on the second support plate, and the cross beam 33a being mounted on the top of the first support plate. The branch pipe positioning tool 33 is used for arranging the central line of the main pipe 8 and the central line 11 of the branch pipe 10 in the same plane, so that the machining precision of the branch pipe 10 is guaranteed.
When the single-piece arm support 7 is assembled, a multi-layer and multi-channel joint staggered welding process is adopted, the thickness of each layer of welding seam is not more than 5mm (generally 3-5 mm), and each layer of welding joints are connected in a staggered mode, namely the joints are not in the same plane and are generally staggered by more than 30 mm. In order to reduce welding stress and prevent the single-piece arm support 7 from downwarping, the welding seam of the branch pipe 10 is welded firstly, and the welding sequence is as follows: on the single-piece arm support 7, welding is started firstly by a main pipe 8 on one side of the single-piece arm support 7, and welding is performed on the same main pipe 8 from the left side to the right side to the middle side alternately, for example, a first branch pipe 10 on the rightmost side of the main pipe 8 (the branch pipe 10 at the end of the arm support head section 1 far away from the arm support middle section 2) is welded firstly, then welding a first branch pipe 10 at the leftmost side of the main pipe 8 (the branch pipe 10 at the end of the arm support tail section 5 far away from the arm support middle section 2), then welding a second branch pipe 10 at the rightmost side of the main pipe 8, then welding a second branch pipe 10 of the main pipe 8 closest to the leftmost side, welding the second branch pipe to the main pipe 8 on the middle section 2 of the arm support according to the method until the main pipe 8 on one side is welded, and welding the main pipe 8 at the other side again according to the same method, finally welding the welding seam of the main pipe 8, and after the single-side welding of the single-piece arm support 7 is finished, turning over the single-piece arm support 7 and then welding the welding seam at the other side according to the requirements.
further, fig. 16 is a schematic structural diagram of a second contour line according to an embodiment of the present invention. Referring to fig. 4 and 16, a second contour line 13 of the main pipe 8 when the two single-piece arm rests 7 are folded is drawn. Specifically, by using a first reference line 15 and a second reference line 16 during assembly of the single boom 7, the first reference line 15 is used as a reference and deviates leftwards by 5571mm to be used as a termination line of a main pipe 8 of the tail section 5 of the boom, the first reference line 15 is used as a reference and deviates rightwards by 37409 to be used as a termination line of the main pipe 8 of the head section 1 of the boom, an intersection point of the termination line of the tail section 5 of the boom and the second reference line 16 is used as a reference and is perpendicular to the second reference line 16, and 1750mm is measured up and down respectively, namely the termination point A, B of the center line of the main pipe 8 of the tail; taking the intersection point of the termination line of the boom head section 1 and the second reference line 16 as a reference, vertically measuring 625mm of the termination line of the main pipe 8 of the boom head section 1, which is the termination point C, D of the center line of the boom head section 1; connecting an AC point, wherein a BD point is the central line of the arm frame folding main pipe 8; when the boom is folded, the central line of the main pipe 8 deviates inward or outward by 101.5mm, which in this embodiment is an inward deviation, that is, the second contour line 13 of the main pipe 8 when the boom is folded. Specifically, as shown in fig. 17, the plumb line 17 is passed around the main pipe 8, and the plumb on the plumb line 17 is positioned on the second contour line 13. The precise arrangement of the main tube 8 according to the second contour line 13 can be ensured by the plumb line 17. It is generally required that the plumb on the plumb line 17 deviates from the second contour line 13 by less than or equal to 3 mm.
further, a central line between two adjacent folding branch pipes 14 when the two single-piece arm rests 7 are folded is drawn. The central line between two adjacent folded branch pipes 14 can be the central line 11 between two adjacent branch pipes 10 drawn when the single-piece arm support 7 is assembled.
further, the jig frame 12 is arranged on the second contour line 12.
further, fig. 18 is a schematic view of a matching structure of the jig frame and the two single-piece arm supports according to the embodiment of the present invention. Referring to fig. 4 and 18, the two assembled single-piece arm rests 7 are respectively arranged on the jig frame 12 according to the second contour lines 13, and the two single-piece arm rests 7 are respectively fixed through the clamping tool 20. In the embodiment, the plumb line 17 is used for hanging the two main pipes 8 of the single arm support 7, and the deviation between the two main pipes 8 and the second contour line 13 is required to be adjusted to be less than or equal to 3 mm; after the adjustment is qualified, fixing the main pipe 8 of one single arm support 7 on the jig frame 12 by adopting a clamping tool 20, arranging the clamping tools 20 at intervals of 8-10m, and avoiding the assembling position of the folding branch pipe 14 by the clamping tools 20.
In this embodiment, fig. 19 is a schematic structural diagram of a clamping tool provided in an embodiment of the present invention. As shown in fig. 19, the clamping tool 20 may include a first clamping plate 20a, a second clamping plate 20b, a fixing plate 20c and a supporting plate 20d, wherein the first clamping plate 20a and the second clamping plate 20b are respectively L-shaped and fixed on one side wall of the fixing plate 20c arranged vertically, and the supporting plate 20d is supported and fixed on the other side wall of the fixing plate 20 c. The two main pipes 8 of the single-piece arm support 7 are respectively clamped in the first clamping plate 20a and the second clamping plate 20 b.
Further, fig. 20 is a schematic structural diagram of a folded branch pipe according to an embodiment of the present invention. As shown in FIG. 20, the folded branch pipes 14 are assembled between two single-piece arm supports 7 according to the center line between two adjacent folded branch pipes 14. The assembly process thereof is carried out with reference to the step of assembling the branch pipe 10 to the main pipe 8. When the folded branch pipes 14 are welded, a multi-layer and multi-channel joint staggered welding process is adopted, the thickness of each layer of welding seam is not more than 5mm (generally 3-5 mm), and each layer of welding joints are connected in a staggered mode, namely the joints are not in the same plane and are generally staggered by more than 30 mm; in order to reduce welding stress and prevent the boom from warping downwards, the welding direction is from the middle to the two ends, the welding seam of the lower main pipe 8 is welded firstly, and then the welding seam of the upper main pipe 8 is welded. Welding seams on one side of the single arm support 7 are welded firstly, then welding seams on the other side of the single arm support 7 are welded, if 2 or 3 folding branch pipes 14 exist in a node, the folding branch pipes 14 on the node are welded at the same time.
further, a boom root support and a main hoisting pulley support are assembled on the single boom 7. Specifically, when the main hoisting pulley support is assembled, as shown in fig. 4 and 21, two ends of two tooling dummy shafts 21 are respectively clamped in two shaft holes of a first partition plate 22 and a second partition plate 23 of the main hoisting pulley support slide; two ends of another two tool dummy shafts 21 are respectively clamped in two shaft holes of a third partition plate 24 and a fourth partition plate 25 of the main lifting wheel supporting slide seat; and connecting the second partition plate 23 with the third partition plate 24 through a channel steel 21a to obtain the assembled main hoisting wheel support sliding seat. And assembling a main lifting wheel support sliding seat on a main pipe 8 of the single-piece arm support 7. In this embodiment, the both ends of frock dummy shaft 21 are provided with the shaft shoulder respectively, and when the assembly, clamp in the shaft hole through the shaft shoulder, set up frock dummy shaft 21 and can avoid installing and receive the damage at the real axle in the shaft hole, but also can keep the distance between the four baffles. Meanwhile, in the embodiment, the tooling dummy shaft 21 can be a hollow shaft, so that the weight of the assembled single-piece arm support 7 can be reduced, and transportation is facilitated.
As shown in fig. 22, the boom root support is lifted to the folded boom tail section 5, and when the boom root support is assembled, the center line 34 of the shaft sleeve 26 of the boom root support is drawn with the first reference line 15 as a reference; as shown in fig. 23, a plumb line 17 is arranged at the apex of the boss 26 of the boom root mount, and the plumb on the plumb line 17 is located on the center line 34 of the boss 26. In the embodiment, by using the second contour line 13 of the main pipe 8 when the arm support is folded, the first reference line 15 is deviated 6091mm to the left, the center line 34 of the shaft sleeve 26 of the support at the root of the arm support is drawn, the first reference line 15 is deviated 36409mm to the right, and the center line of the flange of the main lifting pulley support is drawn; drawing a perpendicular line to the center line of the shaft sleeve 26 of the arm support root support through the point A and the point B, and then translating the perpendicular line to the direction of the second reference line 16 by 130mm to be used as a ground sample line of the shaft sleeve 26 of the arm support root support; and drawing vertical lines of the central lines of the main lifting pulley support flanges with distances of 158mm and 598mm upwards and drawing vertical lines of the central lines of the main lifting pulley support flanges with distances of 158mm and 598mm downwards by taking the intersection point of the central line of the main lifting pulley support flange and a second reference line 16 as a reference.
meanwhile, in this embodiment, the plumb lines 17 may be respectively disposed on two sides of the shaft sleeve 26 of the arm support root support. In theory, the top of the plumb at the 3 position should all fall on the centerline of the sleeve 26. Due to errors, when the vertexes of the plumbs at the 3 positions cannot all fall on the central line of the shaft sleeve 26, if the vertexes of the plumbs at the 3 positions are all on one side of the ground sample line of the spacer sleeve, the tolerance D is required to be less than or equal to 2 mm. If the top points of the plumbs at the positions of 3 are positioned at two sides of the central line of the shaft sleeve 26, the tolerance Smax + Emax is required to be less than or equal to 3 mm.
Further, a sub-arm 27 is fitted to the boom head section 1 (see fig. 4). Specifically, the positioning center line 29 of the pilot arm main tube 28 of the pilot arm 27 is drawn on the first connecting plate and the second connecting plate at both ends of the pilot arm 27, and the second reference line 16 of the main tube 8 when the boom is closed is used as a reference when the positioning center line 29 of the pilot arm main tube 28 of the pilot arm 27 is drawn. As shown in fig. 24, a first connecting plate 32 is welded to the support at the root of the arm support, one end of the upper auxiliary arm main pipe 28 with a large intersecting line angle is placed on the first connecting plate, a steel ruler is placed at the vertex of the auxiliary arm main pipe 28, the position of the auxiliary arm main pipe 28 is adjusted, the distance from the vertex of the auxiliary arm main pipe 28 to the positioning center line 29 on the first connecting plate is 625mm, the distance from the vertex to the upper plate edge of the first connecting plate is 28mm, the gap between the auxiliary arm main pipe 28 and the first connecting plate is adjusted to be 3-5 mm, and the auxiliary arm main pipe 28 is positioned and welded on the first connecting plate; placing one end with a large intersecting line angle of the lower auxiliary arm main pipe 28 on the first connecting plate, placing a steel ruler at the vertex of the auxiliary arm main pipe 28, adjusting the position of the auxiliary arm main pipe 28 to ensure that the distance from the vertex of the auxiliary arm main pipe 28 to the lower vertex of the upper auxiliary arm main pipe 28 is 618mm, the distance from the vertex to the positioning center line 29 is 625mm, adjusting the gap between the lower auxiliary arm main pipe 28 and the first connecting plate to be 3-5 mm, and positioning and welding the lower auxiliary arm main pipe 28 on the first connecting plate; repeating the above operations to position the two secondary arm main pipes 28 on the other side; then the second connecting plate is assembled and finally the sub-arm branch 29 is assembled.
The embodiment of the invention provides a method for processing a truss type arm frame, which comprises the steps of disconnecting a head section of the arm frame of a processed and formed truss type arm frame from a middle section of the arm frame, disconnecting the middle section of the arm frame from a tail section of the arm frame, disconnecting the middle section of the arm frame into at least two sections, and detachably connecting the head section of the arm frame with the middle section of the arm frame, the middle section of the arm frame with the tail section of the arm frame and the middle sections of the multi-section arm frame through second connecting structures which are matched with each other through a first connecting structure and a first connecting structure at two ends of a disconnected part respectively, so that the truss type arm frame is changed into. Meanwhile, the processing method is used for disconnecting the processed and formed truss type arm support, is simple and high in efficiency, can carry out batch biochemistry, and is small in internal stress and welding deformation of the processed truss type arm support. Meanwhile, when the method is used for machining, the clamping and rotating tool, the positioning plate, the plumb line and the jig frame are adopted, so that the machined truss type arm support has high precision.
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. A processing method of a truss type arm support is characterized by comprising the following steps:
processing and forming the truss type arm support, comprising: drawing a first contour line of a plurality of main pipes of a single arm support on two sides of the truss type arm support, wherein the main pipes of the single arm support comprise two main pipes of arm support head sections, two main pipes of arm support middle sections and two main pipes of arm support tail sections;
Drawing a central line between two adjacent branch pipes of the single-piece arm support;
arranging a jig frame on the first contour line, arranging a plurality of main pipes of each single arm support according to the first contour line, and respectively clamping the main pipes on the jig frame;
Respectively assembling a plurality of branch pipes of each single-piece arm support to the corresponding main pipes according to the center line between the two adjacent branch pipes, and welding the main pipes together to obtain the assembled single-piece arm support;
drawing a second contour line of the main pipe when the two single-piece arm supports are folded;
Drawing a central line between two adjacent folding branch pipes when the two single-piece arm frames are folded;
arranging the jig frame on the second contour line;
arranging the two assembled single-piece arm supports on the jig frame according to the second contour lines respectively, and fixing the two single-piece arm supports through clamping tools respectively;
assembling the folded branch pipes between the two single-piece arm frames according to the central line between the two adjacent folded branch pipes;
Assembling a boom root support and a main lifting pulley support on the single boom;
Assembling an auxiliary arm on the head section of the arm support to obtain a machined and molded truss type arm support;
disconnecting the boom head section and the boom middle section of the machined and molded truss type boom, mounting a first connecting structure on the boom head section, and mounting a second connecting structure matched with the first connecting structure on the boom middle section, so that the boom head section and the boom middle section are detachably connected through the first connecting structure and the second connecting structure;
disconnecting the middle arm support section from the tail arm support section, mounting the first connecting structure on the middle arm support section, and mounting the second connecting structure on the tail arm support section, so that the middle arm support section and the tail arm support section are detachably connected through the first connecting structure and the second connecting structure;
the middle section of the arm support is cut into at least two sections, the first connecting structure and the second connecting structure are arranged on each section of the middle section of the arm support, so that the two adjacent middle sections of the arm support are detachably connected through the first connecting structure and the second connecting structure,
drawing a first contour line of a main pipe of the single-piece arm support on two sides of the truss-type arm support, wherein the first contour line comprises the following steps:
Drawing a connecting line between the tail section of the arm support and the middle section of the arm support as a first datum line;
respectively drawing a termination line of the boom tail section, a connecting line of the boom middle section and the boom head section and a termination line of the boom head section by taking the first reference line as a reference;
drawing a center line of the single-piece arm support in the length direction, and taking the center line as a second reference line;
Respectively drawing end points E1 and F1 at one ends of center lines of two main pipes of the arm support tail section on the termination lines of the arm support tail section on two sides of the second reference line by taking the second reference line as a reference;
respectively drawing the end points E2 and F2 of the center lines of the two main pipes of the boom tail section on the first reference line at the two sides of the second reference line by taking the second reference line as a reference;
respectively drawing end points E3 and F3 of center lines of two main pipes of the arm support head section on a connecting line of the arm support middle section and the arm support head section on two sides of the second reference line by taking the second reference line as a reference;
respectively drawing end points E4 and F4 at the other ends of the center lines of the two main pipes of the arm frame head section on the termination lines of the arm frame head section on the two sides of the second reference line by taking the second reference line as a reference;
connecting E1, E2, E3 and E4, and connecting F1, F2, F3 and F4 to obtain the center line of the main pipe of the single-piece arm support;
and drawing a first contour line of the main pipe of the single-piece arm support according to the center line of the main pipe of the single-piece arm support.
2. the process of claim 1, further comprising: and respectively offsetting the central line of the main pipe of the single-piece arm support to two sides, and then drawing two first contour lines of the main pipe of the single-piece arm support, wherein the distances of the central line of the main pipe of the single-piece arm support to the two sides are the corresponding radiuses of the main pipe.
3. The machining method according to claim 2, wherein the step of drawing the center line between two adjacent branch pipes of the single-piece arm support comprises the following steps:
and respectively drawing a central line between the two adjacent branch pipes by taking the first reference line and a connecting line between the middle section of the arm support and the head section of the arm support as references.
4. the method of claim 1, wherein the assembling the branch pipe of each single piece arm support to the main pipe according to the center line of the branch pipe comprises:
arranging a main pipe of the single-piece arm support on a cross beam of the branch pipe positioning tool;
finding out intersection points of the outer walls of the two ends of the branch pipes and the main pipe respectively according to the central line between the two adjacent branch pipes, wherein the intersection points are an E point and an F point respectively;
Arranging the branch pipe on a support plate of the branch pipe positioning tool, and enabling the central line of the branch pipe and the central line of the main pipe to be located in the same plane;
attaching a positioning plate to the outer wall of one end of the branch pipe, and abutting one end of the positioning plate against the point E;
attaching the positioning plate to the outer wall of the other end of the branch pipe, enabling one end of the positioning plate to abut against the point F 'of the main pipe, and measuring the distance d from the point F' to the point F;
and after the branch pipe is moved to the direction of the point F by d/2, welding two ends of the branch pipe to the main pipe respectively.
5. The processing method according to claim 4, wherein the branch pipes are fitted to the main pipes in order from a middle portion of the corresponding main pipe to both ends of the corresponding main pipe.
6. The method of processing of claim 2, wherein said disposing the jig frame on the second contour comprises:
and bypassing a plumb line around the main pipe, and enabling a plumb hammer on the plumb line to be positioned on the second contour line.
7. the machining method according to claim 1, wherein the assembling of the arm support root support and the main hoisting wheel support slide on the single arm support comprises:
Two ends of two tool dummy shafts are respectively clamped in two shaft holes of a first partition plate and a second partition plate of the main lifting wheel supporting slide seat;
Two ends of the other two tool dummy shafts are respectively clamped in two shaft holes of a third partition plate and a fourth partition plate of the main lifting wheel supporting slide seat;
Connecting the second partition plate and the third partition plate through channel steel to obtain an assembled main lifting wheel support sliding seat;
and assembling the main lifting wheel support sliding seat to a main pipe of the single-piece arm support.
8. the machining method according to claim 2, wherein the assembling of the arm support root support and the main hoisting pulley support on the single arm support further comprises:
drawing the center line of the shaft sleeve of the support at the root of the arm support by taking the first datum line as a reference;
and arranging a plumb line at the top point of the shaft sleeve of the support at the root part of the arm support, and enabling a plumb hammer on the plumb line to be positioned on the central line of the shaft sleeve.
9. the process of claim 1, further comprising: and supporting rods are respectively welded between the two disconnected main pipes.
CN201710763671.7A 2017-08-30 2017-08-30 Processing method of truss type arm support Active CN107695550B (en)

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CN110482420A (en) * 2019-08-16 2019-11-22 南通振华重型装备制造有限公司 A kind of floating crane truss-type cantilever crane integral constructing method

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CN105858505A (en) * 2016-06-28 2016-08-17 徐工集团工程机械股份有限公司 Combined jib and hoisting machinery

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JP2000213104A (en) * 1999-01-28 2000-08-02 Nakajima Steel Pipe Co Ltd Inside diaphragm-attached steel pipe and manufacture thereof
CN102489888A (en) * 2011-11-29 2012-06-13 武汉船用机械有限责任公司 Welding method for high-strength steel truss-type cantilever crane
CN103332611A (en) * 2013-04-23 2013-10-02 上海振华重工(集团)股份有限公司 Fabrication method of arm support of crane
CN104671121A (en) * 2013-11-29 2015-06-03 邓耀林 Marine truss-type jib
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