CN111958149B - Alignment and centering device and method for assembling side beam positioning arm - Google Patents

Alignment and centering device and method for assembling side beam positioning arm Download PDF

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Publication number
CN111958149B
CN111958149B CN202010664879.5A CN202010664879A CN111958149B CN 111958149 B CN111958149 B CN 111958149B CN 202010664879 A CN202010664879 A CN 202010664879A CN 111958149 B CN111958149 B CN 111958149B
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positioning
side beam
arm
positioning arm
platform
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CN111958149A (en
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齐先胜
段卫军
陈北平
刘旭光
赵克俭
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CRRC Qingdao Sifang Co Ltd
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CRRC Qingdao Sifang Co Ltd
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    • 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

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  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The invention discloses a device and a method for assembling, aligning and centering a side beam positioning arm, wherein the device comprises a platform; a central positioning part is arranged in the center of the platform; the central positioning piece is a datum for aligning the side beam in the X direction; a positioning arm positioning mechanism, a jacking adjusting mechanism and a height adjusting mechanism are sequentially arranged on two sides of the central positioning piece along the length direction of the side beam, wherein the positioning arm positioning mechanism is an assembling positioning reference of a positioning arm in the X direction; the jacking adjusting mechanism is used for adjusting the Y-direction size when the side beam is aligned; the height adjusting mechanism is used for adjusting the height of the side beam. A plurality of positioning strips are also arranged along the width direction and the length direction of the side beam.

Description

Alignment and centering device and method for assembling side beam positioning arm
Technical Field
The invention relates to a device and a method for assembling, aligning and centering a side beam positioning arm.
Background
The inventor finds that before the assembly of the side beam positioning arm, an assembly datum line needs to be marked by using a three-dimensional marking instrument, and then the side beam positioning arm is lifted to the side beam positioning arm assembly welding tool assembly positioning arm, so that the marking and lifting times between working procedures are large, and the production efficiency is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention combs and analyzes the operation flow of side beam scribing and positioning arm assembling, provides a set of side beam positioning arm assembling, aligning and centering device and a method, and realizes the positioning arm scribing, assembling and welding integrated operation.
The invention aims to provide a device for assembling, aligning and centering a side beam positioning arm, and the invention aims to provide a method for assembling, aligning and centering a side beam positioning arm.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a side sill positioning arm assembling, aligning and centering device, which includes a platform; a central positioning part is arranged in the center of the platform; the central positioning piece is a datum for aligning the side beam in the X direction; along the length direction of the platform, a positioning arm positioning mechanism, a jacking adjusting mechanism and a height adjusting mechanism are respectively and sequentially arranged on two sides of the central positioning piece, wherein the positioning arm positioning mechanism is an assembling positioning reference of a positioning arm in the X direction; the jacking adjusting mechanism is used for adjusting the Y-direction size when the side beam is aligned; the height adjusting mechanism is used for adjusting the height of the side beam. A plurality of positioning strips are also arranged along the width direction and the length direction of the platform.
As a further technical scheme, the positioning strips arranged along the width direction of the platform comprise central positioning strips positioned at two sides of the central positioning piece, positioning arm length direction size detection positioning strips, vertical shock absorber seat assembly datum positioning strips and side beam length direction alignment positioning strips.
As a further technical scheme, the positioning strips along the length direction of the platform comprise side beam width direction alignment positioning strips and spring tube width direction detection positioning strips.
As a further technical scheme, the top of the central positioning piece is provided with a positioning pin.
As a further technical scheme, the positioning arm positioning mechanism comprises two upright posts, and a positioning plate arranged along the longitudinal direction of the platform and an adjusting rod arranged along the width direction of the platform are arranged on the two upright posts; the positioning plate is adjustable in the height direction of the upright post, and the adjusting rod is adjustable in the width direction of the platform.
In a second aspect, the invention further provides a method for assembling, aligning and centering the side beam positioning arm by using the device for assembling, aligning and centering the side beam positioning arm, which comprises the following steps:
the side beam is hung into the side beam positioning arm assembly alignment centering device in a reversely mounted state, and the side beam is aligned;
leading the center of the side beam in the length direction; leading the line to the height direction reference of the side beam;
assembling the positioning arm;
and scribing an assembling datum line of the vertical shock absorber seat.
As a further technical solution, the side sill alignment method is as follows:
a positioning pin of the central positioning device is inserted into the side beam air spring seat body; adjusting the height adjusting mechanism to enable the side beam hollow spring seat plate to be parallel to the plane of the platform; adjusting the jacking adjusting mechanism to enable the edge of the lower cover plate of the side beam to be parallel to the aligning and positioning strip in the width direction of the side beam; and adjusting the height adjusting mechanism to ensure that the edge positions of the middle parts of the upper cover plate and the lower cover plate of the side beam are vertical.
As a further technical scheme, the side beam centering and line-yielding method comprises the following steps:
detecting the size of the outer skin of the spring cylinder by aligning and positioning the length direction of the side beam, wherein the difference between the sizes of the outer skins of the spring cylinders on two sides is required to be smaller than a set value, and if the difference is larger than the set value, the center of the length direction of the side beam is subjected to line yielding;
detecting the size of the spring case cover plate relative to the platform, wherein the size difference of two sides is required to be smaller than a set value, and if the size difference is larger than the set value, a line is required to be led to the height direction reference of the side beam;
the dimension of the spring barrel in the width direction is detected through the detecting and positioning strip in the width direction of the spring barrel, and the difference of the dimensions of the two sides is required to be smaller than a set value.
As a further technical solution, the positioning arm assembling method is as follows:
the length direction size of the positioning arm is detected by taking the length direction size detection positioning strip of the positioning arm as a reference, and when the size does not meet the requirement, the size can be adjusted by adding an adjusting sheet in a positioning groove of a positioning arm positioning mechanism; detecting the height direction size of the positioning arm, and adjusting the height direction size of the positioning arm when the height direction size of the positioning arm does not meet the requirement; the edge of the lower cover plate is taken as an assembly reference of the positioning arm in the width direction, dimension lines are scribed on the lower cover plate before the positioning arm is assembled, and the dimension lines are aligned in the length direction during the assembly of the positioning arm.
As a further technical proposal, the method for scribing the assembling reference line of the vertical damper seat comprises the following steps:
and scribing an assembly datum line of the vertical shock absorber seat at the position of the spring barrel or the lower cover plate through the assembly datum locating strip of the vertical shock absorber seat.
The beneficial effects of the above-mentioned embodiment of the present invention are as follows:
the device and the method for assembling, aligning and centering the positioning arm of the side beam standardize the assembly operation flow of the positioning arm, realize the integrated operation of scribing and assembly welding of the positioning arm, reduce the scribing, lifting and transporting times of the side beam and the adjustment and repair amount of the positioning arm, improve the operation efficiency and shorten the production period.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a front view of the side beam of the present invention in position;
FIG. 2 is a top view of the side beam of the present invention positioned;
FIG. 3 is a schematic three-dimensional view of the side beam for positioning in accordance with the present invention;
FIG. 4 is a front view of the positioning arm scribe assembly weld apparatus of the present invention;
FIG. 5 is a top view of the positioning arm scribe and assembly weld apparatus of the present invention;
FIG. 6 is a schematic three-dimensional structure of the scribing and assembling device of the positioning arm of the present invention;
FIG. 7 is a schematic three-dimensional view of the present invention;
FIG. 8 is a schematic three-dimensional view of the positioning arm positioning mechanism of the present invention;
FIG. 9 is an alignment view of the positioning arm scribing assembly welding apparatus of the side sill of the present invention;
FIG. 10 is a schematic view of the X and Z dimensions of the spring case of the present invention;
FIG. 11 is a schematic view of the Y-direction dimension of the spring case of the present invention;
FIG. 12 is a front view of the positioning arm assembly for measuring dimensions in accordance with the present invention;
FIG. 13 is a top plan view of the positioning arm assembly inspection dimensions of the present invention;
FIG. 14 is a schematic view of an assembly datum line for the vertical damper seat of the present invention;
in the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only. The spring seat plate comprises an a hollow spring seat plate, a b hollow spring seat body, a c spring cylinder upper cover plate, a d vertical shock absorber seat, an e positioning arm, a f lower cover plate, a g spring cylinder and an h upper cover plate;
1, a platform, 2 a center positioning piece, 3 a positioning arm positioning mechanism, 4 a jacking adjusting mechanism, 5 a support jack and 6X-direction center positioning strips; 7, a side beam Y-direction alignment positioning strip, 8 spring barrel Y-direction detection positioning strips, 9 vertical shock absorber seat assembly datum positioning strips, 10 side beam X-direction alignment positioning strips and 11 positioning arm X-direction dimension detection positioning strips;
2-1 positioning pin, 2-2 cylinder, 2-3 lower base, 2-4 upper base;
3-1 base, 3-2 upright posts, 3-3Y direction adjusting rods, 3-4 reinforcing plates, 3-5X direction positioning plates, 3-6 slotted holes and 3-7 bolts.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
in the present embodiment, it is defined that the length direction of the platform coincides with the length direction of the side member, and the width direction of the side member coincides with the width direction of the platform; the height direction of the side beam is consistent with that of the platform; the length direction of the side beam and the length of the platform are set as the X direction; the width direction of the side beam and the width direction of the platform are Y directions; the height direction of the side beam is the Z direction.
In this embodiment, the positioning strip disposed along the width direction of the platform refers to a positioning strip parallel to the width direction of the platform; the positioning strips arranged along the length direction of the platform refer to the positioning strips parallel to the length direction of the platform.
As described in the background art, the conventional side beam assembly structure is shown in fig. 1, 2 and 3, and includes a hollow spring seat plate a, a hollow spring seat body b, two spring barrel upper cover plates c, two sets of vertical damper seats d, four positioning arms e, a lower cover plate f, two sets of spring barrels g and an upper cover plate h; before the positioning arm is assembled, a side beam three-dimensional scribing instrument is used for aligning and marking a reference line in order to obtain a side beam alignment reference line. And the positioning arm is assembled by using a positioning arm assembly welding tool and assembling the positioning arm after aligning the side beam by using a datum line drawn by a three-dimensional scribing instrument. The operation time is long, the lifting times are multiple, and the production efficiency is low. In order to solve the problem, the invention provides a device and a method for assembling, aligning and centering a side beam positioning arm.
In a typical embodiment of the present invention, as shown in fig. 4, 5 and 6, the side sill positioning arm assembling, aligning and centering device disclosed in the present invention comprises a platform 1, a set of center positioning device 2, two sets of positioning arm positioning mechanisms 3, four sets of pretension adjusting devices 4, three sets of support jacks 5, and two sets of X-direction center positioning bars 6; the device comprises two sets of side beam Y-direction alignment positioning strips 7, four sets of spring barrel Y-direction detection positioning strips 8, four sets of vertical shock absorber seat assembly reference positioning strips 9, two sets of side beam X-direction alignment positioning strips 10 and two sets of positioning arm X-direction dimension detection positioning strips 11; all parts are connected through bolts, and the positioning arm scribing, assembling and welding device is matched with a scribing pickaxe needle, a square, a straight steel ruler and a tape measure for use, so that the positioning arm scribing, assembling and welding integrated operation can be realized.
Further, the platform 1 is rectangular as a whole, is of a welding structure or a casting structure, and is a reference for aligning the side beam; furthermore, in order to ensure the alignment precision, the platform plane needs to be accurately ground, and the flatness is generally required to be not more than 0.05 mm.
Further, the center positioning device 2 is a reference for aligning the side beam in the X direction, as shown in fig. 7, and comprises a cylinder 2-2, wherein an upper base 2-4 is arranged at the top of the cylinder 2-2, and a lower base 2-3 is arranged at the bottom of the cylinder; and a positioning pin 2-1 is arranged at the top of the upper base, wherein the diameter of the positioning pin is smaller than that of the inner hole of the side beam air spring seat body, preferably, the diameter of the positioning pin is required to be 0.5mm smaller than that of the inner hole of the side beam air spring seat body, so that the center of the side beam can be led to the wire. The central positioning device 2 is detachably arranged at the central position of the platform through a lower base.
Further, the positioning arm positioning mechanism 3 is a positioning arm X-direction assembly positioning reference; the two positioning arm positioning mechanisms 3 are arranged on two sides of the central positioning device 2 along the length direction of the side beam, the structure of each positioning arm positioning mechanism is shown in figure 8, the positioning arm positioning mechanisms comprise bases 3-1, upright columns 3-2, Y-direction adjusting rods 3-3, reinforcing plates 3-4, X-direction positioning plates 3-5, slotted holes 3-6 and bolts 3-7, wherein long circular connecting holes are formed in the bases 3-1 and are used for achieving connection between the whole device and a platform and size adjustment in the X direction. The upright columns 3-2 comprise two C-shaped channel steel, the notches of the two C-shaped channel steel face outwards, and the two C-shaped channel steel are symmetrically arranged on the base 3. Each C-shaped channel steel is vertically provided with two parallel slotted holes 3-6; the X-direction positioning plate 3-5 is provided with two connecting holes, and two bolts 3-7 penetrate through the two connecting holes to fix the X-direction positioning plate 3-5 on the upright post; the slotted holes 3-6 are long round holes and are mainly used for adjusting the height of the X-direction positioning plates 3-5, namely adjusting the Z-direction size of the positioning arm positioning mechanism, so that the assembly and positioning universality of positioning arms of different vehicle types can be met;
two Y-direction adjusting rods 3-3 are arranged, one Y-direction adjusting rod 3-3 is horizontally arranged on each upright post, the Y-direction adjusting rods 3-3 are positioned below the two slotted holes, the Y-direction adjusting rods 3-3 are connected with the upright posts 3-2 through threads, and the two Y-direction adjusting rods 3-3 move oppositely or oppositely along the Y direction by rotating the two Y-direction adjusting rods 3-3; the position of the side beam in the Y direction is adjusted.
It should be noted that: the Y-direction adjusting rod 3-3 is an adjusting rod arranged along the Y direction; the X-direction positioning plates 3-5 refer to positioning plates arranged along the X-direction. The Z-direction size and the X-direction size of the positioning arm positioning mechanism are adjustable through the oblong holes, and the universality of assembling and positioning of positioning arms of different vehicle types can be met.
Further, the jacking adjusting mechanism 4 is used for adjusting the Y-direction size when the side beam is aligned; the four pre-tightening adjusting devices are divided into two groups, two pre-tightening adjusting devices in each group are oppositely arranged along the Y direction, and one group of pre-tightening adjusting devices is arranged on one side of one positioning arm positioning mechanism; and the other group of pretension adjusting devices are arranged on one side of the other positioning arm positioning mechanism. The specific structure of the jacking adjusting mechanism 4 can adopt the existing bolt adjusting device.
Furthermore, the positioning strip is a reference for alignment of the side beam and assembly size of the positioning arm and is connected with the platform through a bolt and a stable nail; wherein, along the Y direction, two sides of the center positioning device are respectively provided with an X-direction center positioning strip 6; along the X direction, one side of the center positioning device is provided with two side beam Y direction alignment positioning strips 7; set up between tight guiding mechanism 4 in top and location arm positioning mechanism 3 and fix a position arm X to size detection location strip 11, two location arms X realize to two location arm X size detection in the direction of the size detection location strip 11 and fix a position. The two side beam X-direction alignment positioning strips 10 are arranged on the outermost side of the platform; two spring barrel Y-direction detection positioning strips 8 and two vertical shock absorber seat assembly reference positioning strips 9 are arranged between the side beam X-direction alignment positioning strip 10 and the jacking adjusting mechanism 4.
Furthermore, 3 supporting jacks 5 are used for supporting the side beams, the Z-direction size of each side beam can be adjusted through the supporting jacks, and two supporting jacks 5 are arranged between the two spring barrel Y-direction detection positioning strips 8 on the left side; and a supporting jack 5 is arranged between the two vertical shock absorber seat assembly datum positioning bars 9 on the right side.
The embodiment is based on the alignment and centering device for assembling the positioning arms of the side beams, and further provides an alignment and centering method for assembling the positioning arms, wherein the alignment and centering method for assembling the positioning arms needs to use the alignment and assembly welding device for scribing the positioning arms as a reference during the assembling of the positioning arms, and the center of the side beam needs to be aligned and centered with the center of a tool after the side beam is hung into the alignment and assembly welding device for scribing the positioning arms, and the alignment and centering method specifically comprises the following steps:
1. side beam alignment
The side beam is hung into the positioning arm scribing and assembling device in a reversely mounted state, a positioning pin of the central positioning device is required to be inserted into the side beam air spring seat body, and the fact that the diameter of the positioning pin is only 0.5mm smaller than the diameter of an inner cavity of the air spring seat body means that the center of the side beam in the X direction is aligned with the center of the tool when the positioning pin is inserted into the air spring seat body.
The side beam air spring seat plate is used as a Z-direction alignment reference, the side beam air spring seat plate is required to be parallel to a platform plane, preferably, the parallelism is not larger than 0.5mm, and three supporting jacks 5 are used for adjusting the Z-direction height of the side beam when the side beam air spring seat plate is not parallel. And when the side beam air spring seat plate is parallel to the platform plane, the side beam is considered to be aligned in the Z direction.
The middle edge of the lower cover plate of the side beam is used as a Y-direction alignment reference, the lower cover plate edge is required to be parallel to the Y-direction alignment positioning strip of the side beam, and preferably, the parallelism between the lower cover plate edge and the Y-direction alignment positioning strip of the side beam is not more than 1 mm. When the side beams are not parallel, the Y-direction size of the side beams is adjusted by using the jacking adjusting mechanism 4. And when the edge of the lower cover plate is parallel to the Y-direction alignment positioning strip of the side beam, the side beam is aligned in the Y direction.
The perpendicularity of the side beam is detected by taking the edge position of the middle part of the upper cover plate and the lower cover plate of the side beam as a reference, preferably, the perpendicularity of the side beam is required to be not more than 1mm, and the Z-direction height of the side beam can be adjusted by using the support jack when the perpendicularity does not meet the requirement.
And after the X-direction, the Y-direction, the Z-direction and the perpendicularity of the side beam are aligned, the alignment operation of the side beam is completed, and the state of the side beam after the alignment of the positioning arm scribing, assembling and welding device is shown in figure 9.
2. Side beam centering yielding line
Because the side beam is in a box-type asymmetric structure, the spring barrel deforms seriously after the welding of the side beam body is finished. In order to reduce the adjustment and repair amount of the side beam, the deformation problem of the spring cylinders needs to be considered when the positioning arms are assembled, and the relative deformation between the spring cylinders on two sides is reduced in a mode of leading the center of the side beam to be in a line.
The spring case skin dimension A is measured by the side beam X direction alignment locator bar, see FIG. 10. Preferably, the phase difference of the size A of the two sides is required to be not more than 1.5mm, when the phase difference of the size A is more than 1.5mm, the line of the side beam X towards the center needs to be drawn, and the center line of drawing is not more than 0.5 mm.
The spring case cover plate is checked for dimension B relative to the platform, see fig. 10. Preferably, when the difference between the sizes B of the two sides is required to be not more than 2mm and the difference between the sizes B of the two sides is more than 2mm, the Z-direction reference of the side beam needs to be subjected to line yielding, and the parallelism between the air spring seat plate and the platform is required to be not more than 1 mm.
The spring cartridge Y-direction dimension C is detected by the spring cartridge Y-direction detection positioning strip, see fig. 11. Preferably, the difference of the sizes C of the two sides is required to be not more than 1.5mm, when the difference of the sizes C is more than 1.5mm, the parallelism between the edge of the lower cover plate of the side beam and the Y-direction alignment positioning strip of the side beam is subjected to line yielding, and the parallelism is required to be not more than 1 mm.
3. Positioning arm assembly
The assembly detection size of the positioning arm is shown in fig. 12 and 13. When the positioning arm is assembled, the X-direction dimension D of the positioning arm is detected by taking the X-direction dimension detection positioning strip of the positioning arm as a reference, and when the dimension does not meet the requirement, the X-direction dimension D can be adjusted by adding an adjusting sheet of 1mm in a positioning groove (a U-shaped groove on 3-5) of a positioning arm positioning mechanism; detecting the Z-direction dimension E of the positioning arm, and when the Z-direction dimension E does not meet the requirement, adjusting the Z-direction dimension of the positioning arm in a grinding positioning arm or flashing gap assembling mode, preferably, the flashing gap is required to be not more than 2 mm; the edge of the lower cover plate is used as a Y-direction assembly reference of the positioning arm, an F-dimension line is manually marked on the lower cover plate before the positioning arm is assembled, and the Y-direction is aligned with the F-dimension line when the positioning arm is assembled.
4. Scribing vertical damper seat assembly datum line
The vertical damper seat is positioned at the end part of the side beam, the X-direction dimension of the vertical damper seat is difficult to measure from the center, and an X-direction assembly reference line needs to be transferred to the position of the spring barrel. And scribing an assembly datum line of the vertical shock absorber seat at the position of the spring barrel or the lower cover plate through the assembly datum locating strip of the vertical shock absorber seat so as to facilitate the measurement of the dimension of the vertical shock absorber seat in the X direction, and preparing for the subsequent assembly of the vertical shock absorber seat as shown in figure 14.
According to the method and the device for assembling, aligning and centering the positioning arms of the side beams, the operation flow of assembling the positioning arms is standardized, the integrated operation of scribing and assembling and welding of the positioning arms is realized, the scribing and hoisting times of the side beams and the adjustment and repair amount of the positioning arms are reduced, the operation efficiency is improved, and the production period is shortened.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A side beam positioning arm assembly alignment centering device is characterized by comprising a platform, wherein a central positioning piece is arranged in the center of the platform, and a positioning arm positioning mechanism, a jacking adjusting mechanism and a height adjusting mechanism which are arranged on the platform are sequentially arranged on two sides of the central positioning piece along the length direction of the platform respectively; a plurality of positioning strips are also arranged along the width direction and the length direction of the platform; the positioning strips arranged along the width direction of the platform comprise positioning arm length direction dimension detection positioning strips positioned on two sides of the central positioning piece; the positioning arm positioning mechanism comprises two stand columns, positioning plates arranged along the longitudinal direction of the platform are arranged on the two stand columns, positioning grooves are formed in the positioning plates, positioning arm length direction size detection positioning strips are used as reference to detect the length direction sizes of the positioning arms, and if the positioning arm positioning mechanism is not in accordance with the requirements, the positioning arm positioning mechanism is adjusted in a mode of increasing adjustment pieces in the positioning grooves of the positioning arm positioning mechanism.
2. The assembly, alignment and centering device for the positioning arms of the side beams as claimed in claim 1, wherein the positioning strips arranged along the width direction of the platform further comprise a center positioning strip, a vertical shock absorber seat assembly reference positioning strip and a length direction alignment positioning strip of the side beams, which are positioned at two sides of the center positioning piece.
3. The assembly, alignment and centering device for the positioning arms of the side sill as claimed in claim 2, wherein two positioning arms are provided along the length of the platform, and the two positioning arms are respectively provided between the positioning arm positioning mechanism and the tightening adjusting mechanism.
4. The assembly, alignment and centering device for the positioning arms of the side beams as claimed in claim 2, wherein two sets of the vertical shock absorber seat assembly datum positioning strips are arranged, each set comprises two sets, and the two vertical shock absorber seat assembly datum positioning strips are oppositely arranged.
5. The assembly alignment and centering device for the positioning arm of the side sill as claimed in claim 2, wherein two of said longitudinal alignment and positioning strips are provided, respectively, at the outermost side of the platform along the length direction of the platform.
6. The assembly alignment and centering device for the positioning arm of the side sill as claimed in claim 1, wherein the positioning strips arranged along the length direction of the platform include a width direction alignment positioning strip of the side sill and a width direction detection positioning strip of the spring case.
7. The assembly alignment and centering device for the positioning arms of the side sill according to claim 1, wherein the top of said centering member is provided with a positioning pin.
8. The assembly, alignment and centering device for the positioning arms of the side beam as claimed in claim 1, wherein the positioning arm positioning mechanism is further provided with adjusting rods arranged along the width direction of the platform on the two upright posts; the positioning plate is adjustable in the height direction of the upright post, and the adjusting rod is adjustable in the width direction of the platform.
9. The method for assembling, aligning and centering the side sill positioning arm by using the device for assembling, aligning and centering the side sill positioning arm as claimed in any one of claims 1 to 8, is characterized by comprising the following steps:
the side beam is hung into the side beam positioning arm assembly alignment centering device in a reversely mounted state, and the side beam is aligned;
leading the center of the side beam in the length direction; leading the edge of the lower cover plate of the side beam and the parallelism of the Y-direction alignment positioning strip of the side beam;
assembling the positioning arm;
and scribing an assembling datum line of the vertical shock absorber seat.
10. The method of assembling, aligning and centering a side sill positioning arm of claim 9, wherein: the assembly, alignment and centering method of the side beam positioning arm comprises the following steps:
a positioning pin of the central positioning device is inserted into the side beam air spring seat body; adjusting the height adjusting mechanism to enable the side beam hollow spring seat plate to be parallel to the plane of the platform; adjusting the jacking adjusting mechanism to enable the edge of the lower cover plate of the side beam to be parallel to the aligning and positioning strip in the width direction of the side beam; and adjusting the height adjusting mechanism to ensure that the edge positions of the middle parts of the upper cover plate and the lower cover plate of the side beam are vertical.
11. The method of assembling, aligning and centering a side sill positioning arm of claim 9, wherein: the side beam centering and line-yielding method comprises the following steps:
detecting the size of the outer skin of the spring cylinder by aligning and positioning the length direction of the side beam, wherein the difference between the sizes of the outer skins of the spring cylinders on two sides is required to be smaller than a set value, and if the difference is larger than the set value, the center of the length direction of the side beam is subjected to line yielding;
detecting the size of the spring case cover plate relative to the platform, wherein the size difference of two sides is required to be smaller than a set value, and if the size difference is larger than the set value, a line is required to be led to the height direction reference of the side beam;
the width direction size of the spring barrel is detected through the width direction detection positioning strip of the spring barrel, the size difference of two sides is required to be smaller than a set value, and if the size difference is larger than the set value, the line yielding needs to be carried out on the parallelism of the edge of the lower cover plate of the side beam and the Y-direction alignment positioning strip of the side beam.
12. The method of assembling, aligning and centering a side sill positioning arm of claim 9, wherein: the positioning arm assembling method comprises the following steps:
detecting the length direction size of the positioning arm by taking the length direction size detection positioning strip of the positioning arm as a reference, and if the length direction size detection positioning strip does not meet the requirement, adjusting the length direction size by adding an adjusting sheet in a positioning groove of a positioning arm positioning mechanism;
detecting the height direction size of the positioning arm, and if the height direction size of the positioning arm does not meet the requirement, adjusting the height direction size of the positioning arm;
the edge of the lower cover plate is taken as an assembly reference of the positioning arm in the width direction, dimension lines are scribed on the lower cover plate before the positioning arm is assembled, and the dimension lines are aligned in the length direction during the assembly of the positioning arm.
13. The method of assembling, aligning and centering a side sill positioning arm of claim 9, wherein: the method for scribing the vertical damper seat assembly datum line comprises the following steps:
and scribing an assembly datum line of the vertical shock absorber seat at the position of the spring barrel or the lower cover plate through the assembly datum locating strip of the vertical shock absorber seat.
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