CN113084423B - Welding positioning fixture for frame of telescopic boom forklift - Google Patents

Welding positioning fixture for frame of telescopic boom forklift Download PDF

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Publication number
CN113084423B
CN113084423B CN202110346842.2A CN202110346842A CN113084423B CN 113084423 B CN113084423 B CN 113084423B CN 202110346842 A CN202110346842 A CN 202110346842A CN 113084423 B CN113084423 B CN 113084423B
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positioning
welding
frame
fixing seat
primary
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CN113084423A (en
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覃荣平
尹金波
韦达
李世净
梁东杰
潘双宝
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Liuzhou Yinxiang Machinery Co ltd
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Liuzhou Yinxiang Machinery Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B23K37/0435—Clamps
    • B23K37/0443—Jigs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The invention relates to a positioning fixture for welding a frame of a telescopic forklift, which comprises a base, a main positioning seat, a positioning seat penetrating shaft and a fixing plate, wherein the surface of the end parts of a plurality of support columns is matched with the integral outline of the bottom of the frame and enables the frame to be integrally horizontal; the device also comprises an auxiliary fixing seat, and a primary splice welding positioning shaft is arranged at the upper part of the auxiliary fixing seat. By adopting the technical scheme, the accuracy and precision of the splicing size can be ensured; meanwhile, welding seams of accessories can be welded in a fixture clamping state when the accessories are spliced, welding deformation is reduced to a great extent, and production efficiency and product quality are improved to a great extent. By adopting the technical scheme, each large part can be welded in the fixture clamping state, so that standard parts can be directly used for splice welding, the correctness and the accuracy of splice size can be ensured, and the requirement of product quality is well met.

Description

Welding positioning fixture for frame of telescopic boom forklift
Technical Field
The invention relates to the field of ultra-large workpiece splicing ultra-large power welding fixture, in particular to a positioning fixture for splicing and welding a frame of a telescopic arm forklift.
Background
At present, a plurality of steel parts of ultra-large engineering machinery are needed to be mutually spliced and welded to form in the production and manufacturing process, the requirements of the large engineering machinery parts on the shape of each part, the opening holes on the parts and the accuracy of angles are very high, the situation that the steel cannot meet the process requirements due to the fact that the steel is located and deformed due to the fact that the high temperature of a welding spot part is high in ultra-high power welding during welding is considered, a general machining mode is to splice and weld a main part of a steel profile part with the size larger than the process requirements firstly and then hoist the main part to an ultra-large milling machine through the whole splice to process the main part to reach the standard splice with the size meeting the process requirements, and the ultra-large milling machine is needed to correspond to the operation after the splice welding, so that the operation is very complex and the requirements are very high.
The equipment for accurately fixing the large-sized workpiece is not needed during construction, a plurality of large-sized parts are lifted by using an aerial crane or placed on the ground, the large-sized parts are mutually spliced and then machined in a scribing mode or a mode of using a simple template to assist positioning, meanwhile, the moving or overturning angles are often needed in the machining process, because the engineering mechanical parts are huge and heavy, the lengths of some parts reach tens of meters or even tens of meters under the general condition, the weights reach more than a few tons to a few tons, if the large-sized mechanical parts are manufactured in the mode, the machining difficulty is huge for welding operation or milling machine machining, the requirement for machining equipment is very high, the common machining mode is needed to have a large number of hands and is easy to make mistakes, and meanwhile, the scribing errors can also cause various interferences of the parts in the splicing process, so that the efficiency is very low, the large errors often occur, and the construction process has high safety risks. The invention mainly relates to a 10K telescopic forklift which is ultra-large equipment for transporting, loading and unloading cargoes in a port container, and the working weight of the ultra-large equipment is always up to 100 tons.
Disclosure of Invention
The invention aims to provide a telescopic arm forklift frame splice welding positioning fixture which is convenient for a large-scale assembly process, and aims to solve the problem of inconvenient welding in welding of large-scale splice welding parts and the problem of milling the large-scale splice welding parts to a standard size by hoisting the large-scale splice welding parts to a milling machine after welding.
The technical scheme adopted by the invention is as follows: the frame comprises a cuboid base and a plurality of support columns, wherein the support columns are arranged in a pair combination mode and are respectively arranged on the base in a single mode, the surfaces of the end parts of the support columns are matched with the overall outline of the bottom of the frame and enable the frame to be integrally horizontal, the pair of support columns are mutually connected by a reinforcing rib connecting plate with the same size and then fixed on the base, the upper ends of the support columns are support surfaces, and columnar frame positioning pins are arranged at the central positions of the support surfaces; the main positioning seat comprises a primary splice welding left vertical plate fixing seat and a primary splice welding right vertical plate fixing seat, a positioning seat penetrating shaft and a fixing plate are connected to the middle lower part between the primary splice welding left vertical plate fixing seat and the primary splice welding right vertical plate fixing seat, the positioning seat penetrating shaft corresponds to the curved surface top of a first curved surface groove at the tail part of the frame, the bottom surface of the tail part of the frame falls into the positioning seat penetrating shaft and is just supported by the fixing plate, and a gap is formed between the primary splice welding left vertical plate fixing seat, the primary splice welding right vertical plate fixing seat and the side surface of the frame; the auxiliary fixing seat is concave, the bottom of the auxiliary fixing seat is fixedly connected with the base, the upper part of the auxiliary fixing seat is provided with a primary welding positioning shaft connected with two ends of the auxiliary fixing seat, and the position of the primary welding positioning shaft corresponds to the curved surface top of the second curved surface groove at the tail part of the frame; the secondary splice welding right side part support comprises a bottom plate and a positioning die, the front end of the bottom plate is fixedly connected with the right side surface of the middle part of the base, and the rear end of the bottom plate extends outwards along the middle part of the right side of the base; two vertical positioning rods are arranged at the left end and the right end of the bottom plate, positioning through holes are formed in the positions, corresponding to the positioning rods, of the two ends of the positioning die, and the positioning die penetrates through the positioning rods through the positioning through holes and is mounted on the bottom plate; the left end of the positioning die is provided with a groove corresponding to the bulge at the bottom surface of the left end of the bottom plate bridge installation surface, the right end of the positioning die is provided with a bulge corresponding to the groove at the right end of the bottom plate bridge installation surface, and the middle part of the positioning die is provided with two clamping seats for clamping the middle top surface of the bottom plate bridge installation surface; the upper ends of left support columns of a group of support columns on the middle part of the base are provided with compression screws, and the upper ends of right support columns are provided with positioning baffles;
the primary tailor-welding positioning shaft is provided with a positioning screw, and the positioning screw is positioned at the contact position of the curved surface top of the first curved surface groove at the tail part of the frame and the primary tailor-welding positioning shaft; the secondary tailor-welded cab part positioning support is attached to the contour of the cab, is fixedly arranged in the middle of the left side of the base and extends outwards, and is integrated or divided into a plurality of parts to be assembled and attached to the contour of the bottom of the cab; the supporting surface is a square or round plane; the outer side of the primary splice welding left vertical plate fixing seat and the outer side of the primary splice welding right vertical plate fixing seat are also provided with two reinforcing rib vertical plates; the fixing plate is used for fixedly connecting the primary welding left vertical plate fixing seat and the primary welding right vertical plate fixing seat through screws; a secondary tailor-welded rear axle positioning seat is arranged above the left end of the primary tailor-welded positioning shaft; the welding head assembly fixing seat is attached to the outline of the welding head assembly, the welding head assembly fixing seat is arranged at the front end of the base, and a compression screw is arranged on the welding head assembly fixing seat.
The beneficial effects of the invention are as follows: by adopting the technical scheme, the frame bottom is positioned on the same horizontal plane by the support columns on the base, the left and right vertical plates and other parts of the frame are spliced and fixed, the large-scale parts are spliced very conveniently, the accuracy and precision of the spliced size can be ensured, and the requirement of product quality is well met; meanwhile, when the fixture is used for splicing, all large parts can be welded in a fixture clamping state, and the deformation amount generated by welding is almost zero, so that standard parts can be directly used for splicing; the welding operation method and the angle in the welding of the large-scale splice are diversified, and the complex process steps of hoisting the welded large-scale splice to a milling machine and milling the welded large-scale splice to the standard size are omitted.
Drawings
FIG. 1 is a schematic structural view of a welding positioning fixture for a telescopic boom forklift frame;
FIG. 2 is a schematic structural view of the workpiece mounted on the jig for welding and positioning the telescopic forklift frame;
reference numerals:
the device comprises a base, a 2-supporting column, a 21-reinforcing rib connecting plate, a 22-supporting surface, a 23-frame locating pin, a 24-locating groove, a 25-compression screw, a 3-main fixing seat, a 31-primary welding left vertical plate fixing seat, a 32-primary welding right vertical plate fixing seat, a 33-locating seat penetrating shaft, a 34-fixing plate, a 35-reinforcing rib vertical plate, a 4-auxiliary fixing seat, a 41-primary welding locating shaft, a 42-secondary welding rear axle locating seat, a 43-locating screw, a 5-secondary welding right side part support, a 51-bottom plate, a 52-locating die, a 53-locating rod, a 54-groove, a 55-protrusion, a 56-clamping seat and a 6-secondary welding cab part locating support.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
Embodiment one:
a positioning fixture for welding the frame of telescopic forklift is composed of the left and right frame plates, and the installing surface of bottom plate bridge and cab. The invention pre-opens a locating hole at the curved surface top of the second curved surface groove at the tail part of the frame, pre-opens a locating hole on the outline surface at the bottom of the frame, and directly uses the standard part of the left vertical plate of the frame and the right vertical plate of the frame for welding during splice welding, thereby omitting the process of ultra-large milling machine equipment. The specific technical scheme is as follows.
As shown in fig. 1 and 2, the telescopic forklift frame splice welding positioning fixture comprises a cuboid base 1, wherein the base 1 is formed by welding high-strength steel plates, a mounting position mark is arranged on the base 1, scale marks 7 are arranged on the edge of the surface of the base 1, other fixing parts can be conveniently selected and mounted at proper positions, the fixture further comprises a plurality of support columns which are arranged in a pair combination mode and are respectively mounted on the base 1 in a single mode, the surfaces of the end parts of the plurality of support columns are matched with the whole outline of the bottom of the forklift frame and enable the whole forklift frame to be horizontal, the pair of support columns are connected by a reinforcing rib connecting plate 21 and then are fixed on the base 1, the pair of support columns are manufactured in a shape symmetrical to the left outline and the right outline of the bottom of the forklift frame, the pair of support columns are manufactured to be more convenient to correspond to the mounting positions of the pair of support columns, the pair of support columns are favorable for manufacturing the telescopic forklift frame splice welding positioning fixture, the inside side faces of the forklift frame are just supported by the side faces of the support columns, and the middle part of the reinforcing rib connecting plate 21 can be arranged in a hollowed-out shape so as to lighten the weight of the forklift frame; the upper end of the support column 2 is a support surface 22, a columnar frame positioning pin 23 is arranged in the central position of the support surface 22, and the frame positioning pin 23 corresponds to a positioning hole pre-formed in the frame so that the frame positioning pin 23 can just pass through the positioning hole in the frame to position, install and fix the frame when the frame is put into the fixture; the mode of installing the support column 2 on the base 1 can be a direct welding and fixing mode or a mode of forming a screw hole on the base 1, forming a screw thread on the lower part of the support column 2, screwing the support column 2 into the screw hole for installation, and meanwhile, for conveniently identifying the depth of screwing the support column into the screw hole, setting a scale mark on the support column 2, wherein the mode is more flexible, and the height of the support column 2 can be adjusted by adjusting the depth of screwing the support column into the screw hole so as to enable the top end of the support column 2 to be tightly attached to the bottom surface profile of the frame as much as possible; the height of the frame locating pin 23 is set to be 2-5 cm, meanwhile, in order to ensure the stability of the frame locating pin 23 when the frame is fixed, threads can be arranged at the top end of the frame locating pin 23 and matched with nuts, when the frame is placed on a fixture, the frame locating pin 23 penetrates through a locating hole reserved on the frame, and at the moment, the frame can be further pressed and fixed by screwing the nuts into the frame locating pin 23, so that deformation of the frame during machining is prevented. The distal end portion of the frame positioning pin 23 is not limited to the manner of providing a screw and matching a nut to further press and fix the frame, and a manner of providing a pin hole at the distal end portion of the frame positioning pin 23 and using a pin, or a manner of fastening or other simple operation may be used to further fix the frame.
The telescopic boom forklift frame splice welding positioning fixture further comprises a main positioning seat 3, wherein the main positioning seat comprises a primary splice welding left vertical plate fixing seat 31 and a primary splice welding right vertical plate fixing seat 32, a positioning seat penetrating shaft 33 and a fixing plate 34 are connected to the middle lower part between the primary splice welding left vertical plate fixing seat 31 and the primary splice welding right vertical plate fixing seat 32, the positioning seat penetrating shaft 33 corresponds to the curved surface top of a first curved surface groove at the tail part of the forklift frame, the bottom surface of the tail part of the forklift frame falls into the positioning seat penetrating shaft 33 and is just supported by the fixing plate 34, a gap is formed between the primary splice welding left vertical plate fixing seat 31, the primary splice welding right vertical plate fixing seat 32 and the lateral surface of the forklift frame, and the left and right gaps are respectively the same as the thickness of the left vertical plate and the right vertical plate of the forklift frame; the telescopic boom forklift frame splice welding positioning fixture further comprises a concave auxiliary fixing seat 4, the bottom of the auxiliary fixing seat is fixedly connected with the base 1, a primary splice welding positioning shaft 41 connected with two ends of the auxiliary fixing seat 4 is arranged on the upper portion of the auxiliary fixing seat, and the position of the primary splice welding positioning shaft 41 corresponds to the curved surface top of a second curved surface groove at the tail of the forklift frame. After the frame is positioned and clamped, the frame left vertical plate and the frame right vertical plate are respectively inserted into the gaps between the one-time splice welding left vertical plate fixing seat 31 and the one-time splice welding right vertical plate fixing seat 32 and the side surface of the frame, the size of the gaps is the same as that of the frame left vertical plate and the frame right vertical plate, and the frame left vertical plate and the frame right vertical plate are pushed to enable the curved surface tops of the first curved surface groove and the second curved surface groove of the frame left vertical plate and the frame right vertical plate to fall into the positioning seat penetrating shaft 33 and the one-time splice welding positioning shaft 41 respectively, so that the frame left vertical plate, the frame right vertical plate and the frame are spliced and positioned and form limit locking.
Preferably, the left side support column upper end of a set of support column 2 on base 1 middle part is provided with compression screw 25, and the right side support column upper end is provided with positioning baffle, and when the frame was put into frock clamp, frame one side was withheld by positioning baffle, and the other side compresses tightly the frame to positioning baffle one side fixedly through compression screw 25, can improve frock clamp's accuracy, prevents that the part from warping the position.
Preferably, the device further comprises a secondary splice welding right side part support 5, wherein the secondary splice welding right side part support 5 comprises a bottom plate 51 and a positioning die 52, the front end of the bottom plate 51 is fixedly connected with the right side surface of the middle part of the base, and the rear end of the bottom plate extends outwards along the middle part of the right side of the base; two vertical positioning rods 53 are arranged at the left end and the right end of the bottom plate 51, positioning through holes are formed at the positions, corresponding to the positioning rods 53, of the two ends of the positioning die 52, and the positioning die 52 is installed on the bottom plate through the positioning through holes and penetrates through the positioning rods 53; the left end of the positioning die 52 is provided with a groove 54 corresponding to the bottom surface bulge at the left end of the bottom plate bridge installation surface, the right end of the positioning die is provided with a bulge 55 corresponding to the bottom surface bulge at the right end of the bottom plate bridge installation surface, and two clamping seats 56 are arranged in the middle to clamp the middle top surface of the bottom plate bridge installation surface.
Preferably, the positioning screw 43 is disposed on the primary tailor-welding positioning shaft 41, the positioning screw 43 is located at the contact position between the curved surface top of the first curved surface groove at the tail of the frame and the primary tailor-welding positioning shaft, and when the frame is placed into the fixture, the positioning screw 43 penetrates through the pre-opened positioning hole on the frame to position the frame.
Preferably, the device also comprises a secondary splice welding cab part positioning support 6 which is attached to the contour of the cab, is fixedly arranged in the middle of the left side of the base 1 and extends outwards, and is integrated or divided into a plurality of parts to be assembled and attached to the contour of the bottom of the cab; the secondary welding cab component positioning support divided into a plurality of components comprises a secondary welding cab component first support, a secondary welding cab component second support and a secondary welding cab component third support, the cab component first support, the secondary welding cab component second support and the secondary welding cab component third support can be used, the cab is spliced and positioned integrally, and then spliced and positioned on the base, the positioning supports are attached to the contour of the bottom surface of the cab, so that the accuracy and stability of the cab in splicing and splicing can be effectively improved, and deformation and position shifting during welding can be prevented.
Preferably, the supporting surface 22 is a square or circular plane, so that the supporting contact part is more fit, and the contact range with the bottom of the frame can be increased, so that the bottom of the frame is prevented from being deformed due to overlarge pressure.
Preferably, two reinforcing rib risers 35 are further arranged on the outer sides of the one-time splice welding left riser fixing seat 31 and the one-time splice welding right riser fixing seat 32, so that the bearing strength of the main fixing seat 3 can be further effectively improved, and the displacement deformation of the main fixing seat during the fixing of oversized parts is avoided.
Preferably, the fixing plate 34 connects and fixes the left vertical plate fixing seat 31 and the right vertical plate fixing seat 32 by screws, and the fixing plate can further strengthen the connection strength of the left vertical plate fixing seat 31 and the right vertical plate fixing seat 32 by one-time splice welding while supporting the frame.
Preferably, a secondary welding rear axle positioning seat 42 is arranged above the left end of the primary welding positioning shaft and is attached to the contour of the rear axle, and a compression screw 25 is also arranged on the secondary welding rear axle positioning seat 42, so that the frame rear axle can be precisely spliced and fixed.
The problem of inconvenient welding in the welding of large-scale splice welding spare has been solved simultaneously, has saved the welding of large-scale splice welding spare and has been hoisted the milling machine and mill to the standard size's problem again, can directly carry out the splice welding with the standard part.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (1)

1. A positioning fixture for welding a frame of a telescopic forklift is characterized in that: the support comprises a cuboid base and a plurality of support columns, wherein the support columns are arranged in a pair combination mode and are respectively arranged on the base in a single mode, the pair of support columns are mutually connected through reinforcing rib connecting plates with the same size and then are fixed on the base, the upper ends of the support columns are support surfaces, a raised columnar frame locating pin is arranged in the central position of each support surface, the support columns are used for supporting the bottom of a frame to enable the frame to be in a horizontal position on the whole, and the plane of each support column is attached to the outline of the bottom of the frame;
the main positioning seat comprises a primary splice welding left vertical plate fixing seat and a primary splice welding right vertical plate fixing seat, a positioning seat penetrating shaft and a fixing plate are connected to the middle lower part between the primary splice welding left vertical plate fixing seat and the primary splice welding right vertical plate fixing seat, the positioning seat penetrating shaft corresponds to the curved surface top of a first curved surface groove at the tail part of the frame, the bottom surface of the tail part of the frame falls into the positioning seat penetrating shaft and is just supported by the fixing plate, and a gap is formed between the primary splice welding left vertical plate fixing seat, the primary splice welding right vertical plate fixing seat and the side surface of the frame;
the auxiliary fixing seat is concave, the bottom of the auxiliary fixing seat is fixedly connected with the base, the upper part of the auxiliary fixing seat is provided with a primary welding positioning shaft connected with two ends of the auxiliary fixing seat, and the position of the primary welding positioning shaft corresponds to the curved surface top of the second curved surface groove at the tail part of the frame;
the secondary splice welding right side part support comprises a bottom plate and a positioning die, the front end of the bottom plate is fixedly connected with the right side surface of the middle part of the base, and the rear end of the bottom plate extends outwards along the middle part of the right side of the base; two vertical positioning rods are arranged at the left end and the right end of the bottom plate, positioning through holes are formed in the positions, corresponding to the positioning rods, of the two ends of the positioning die, and the positioning die penetrates through the positioning rods through the positioning through holes and is mounted on the bottom plate; the left end of the positioning die is provided with a groove corresponding to the bulge at the bottom surface of the left end of the bottom plate bridge installation surface, the right end of the positioning die is provided with a bulge corresponding to the groove at the right end of the bottom plate bridge installation surface, and the middle part of the positioning die is provided with two clamping seats for clamping the middle top surface of the bottom plate bridge installation surface;
the upper ends of left support columns of a pair of support columns on the middle part of the base are provided with compression screws, and the upper ends of right support columns are provided with positioning baffles;
the primary tailor-welding positioning shaft is provided with a positioning screw, and the positioning screw is positioned at the contact position of the curved surface top of the first curved surface groove at the tail part of the frame and the primary tailor-welding positioning shaft; the secondary welding cab part positioning support is integrated or divided into a plurality of parts to be assembled and then attached to the contour of the bottom of the cab; the supporting surface is a square or round plane; the outer side of the primary splice welding left vertical plate fixing seat and the outer side of the primary splice welding right vertical plate fixing seat are also provided with two reinforcing rib vertical plates; the fixing plate is used for fixedly connecting the primary welding left vertical plate fixing seat and the primary welding right vertical plate fixing seat through screws; the left end top of once welding location axle is provided with the secondary welding rear axle positioning seat, with rear axle profile laminating, is provided with compression screw on the secondary welding rear axle positioning seat.
CN202110346842.2A 2021-03-31 2021-03-31 Welding positioning fixture for frame of telescopic boom forklift Active CN113084423B (en)

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CN114939752B (en) * 2022-06-02 2023-06-27 江汉大学 Welding processing system and method for web tailor-welding production

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