CN117359348B - Positioning fixture for machining end beam of low-floor bogie - Google Patents
Positioning fixture for machining end beam of low-floor bogieInfo
- Publication number
- CN117359348B CN117359348B CN202311415085.5A CN202311415085A CN117359348B CN 117359348 B CN117359348 B CN 117359348B CN 202311415085 A CN202311415085 A CN 202311415085A CN 117359348 B CN117359348 B CN 117359348B
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- CN
- China
- Prior art keywords
- hanging seat
- rubber node
- node installation
- positioning
- gear box
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
The utility model provides a low floor bogie end beam processing positioning fixture, belongs to low floor train bogie end beam processing and uses positioner field, and it includes lathe docking base, two sets of rubber node installation hanging seat positioner and one set of gear box hanging seat positioner, two sets of rubber node installation hanging seat positioner are located gear box hanging seat positioner's left and right sides respectively, and the third is parallel arrangement each other and the bottom of the third all links firmly with the up end welding of lathe docking base. The positioning fixture for machining the end beam can finish machining all parts of the end beam on one set of fixture, completely overcomes the defects that a plurality of sets of fixtures are needed to be adopted in the prior art, different clamping modes and clamping positions are changed, and a complicated and lagging method for machining a workpiece can be finished only by a plurality of steps.
Description
Technical Field
The invention belongs to the field of positioning devices for processing end beams of low-floor trucks, and particularly relates to a positioning fixture for processing end beams of low-floor trucks.
Background
A certain bogie for a low-floor type railway train is a novel bogie which is developed based on the domestic urban railway project market and has low speed, low noise and compact structure. Because the bogie is compact in structure, the precision requirement on the machining size of each part is very strict, and one end of the gearbox is fixed on the front end beam, the front end beam is an important bearing part of the bogie.
As shown in fig. 1 to 5, the front end beam a of the bogie is a welded assembly, and comprises an end beam lower cover plate 1, an obtuse trapezoid long cover plate 2, an obtuse trapezoid short cover plate 3, a right trapezoid long vertical plate 4, a right trapezoid short vertical plate 5, a gear box hanging seat 6 and two rubber node mounting hanging seats 7, wherein the end beam lower cover plate 1 sequentially comprises a lower cover plate long plate 1-1, a lower cover plate middle plate 1-2 and a lower cover plate short plate 1-3 which are coplanar with each other; the contour line of the long plate 1-1 of the lower cover plate is the projection of the long cover plate 2, the right-angle side of the trapezoid of the long vertical plate 4 is vertically welded on the central line of the long plate 1-1 of the lower cover plate, the right-angle side of the trapezoid of the long vertical plate 4 is vertically welded on the central line of the long cover plate 2, the three sides of the trapezoid of the long vertical plate 4 form a long beam structure with an I-shaped cross section, the contour line of the short plate 1-3 of the lower cover plate is the projection of the short cover plate 3, the right-angle side of the trapezoid of the short vertical plate 5 is vertically welded on the central line of the short plate 1-3 of the lower cover plate, the right-angle side of the trapezoid of the short vertical plate 5 is vertically welded on the central line of the short cover plate 3, the three sides of the trapezoid of the short vertical plate 5 form a long beam structure with an I-shaped cross section and a L1 of the length, the gearbox hanging seat 6 comprises a gearbox hanging seat upper cover plate 6-1 with a rectangular main body, a gearbox hanging seat 6-2 and a gearbox hanging seat 6-3 with a rectangular structure, the top long side of the gearbox hanging seat 6-2 is welded with the central line of the gearbox hanging seat 6-1, the gearbox hanging seat 6-3 is fixedly connected with the middle side of the outer side of the hanging seat 6-2, the axis of the gear box hanging hole seat 6-3 is perpendicular to the upper cover plate 6-1 of the gear box hanging hole seat, and a gear box hanging hole 6-3-1 with the size phi 26 is formed along the axial direction of the gear box hanging hole seat 6-3 through a drilling procedure. The long side of the bottom of the vertical plate 6-2 of the hanging seat of the gearbox is vertically welded with the middle line of the short side of the middle plate 1-2 of the lower cover plate. The left and right short sides of the gear box hanging seat vertical plate 6-2 are respectively welded with the bottom edge of the long vertical plate 4 right trapezoid and the bottom edge of the short vertical plate 5 right trapezoid to form an integral vertical plate structure coplanar with each other, the left and right short sides of the gear box hanging seat upper cover plate 6-1 are respectively welded with the bottom edge of the long cover plate 2 obtuse trapezoid and the bottom edge of the short cover plate 3 obtuse trapezoid to form a bridge-shaped structure with the middle section horizontal and the left and right sides respectively lowered to two sides. The side wall of the vertical plate 6-2 of the hanging seat of the gear box is divided into a small flat plate 6-2-1 with the width D1 at the left side and the right side by the hanging hole seat 6-3 of the gear box.
The rubber node mounting hanging seat 7 comprises a wedge base 7-1 and a rubber node mounting seat sleeve 7-2 which are right trapezoid in side view, wherein the rear end face of the wedge base serving as the lower bottom of the right trapezoid and the outer side wall of the rubber node mounting seat sleeve 7-2 are connected with each other and integrally formed, and the wedge base 7-1 also comprises a wedge front end face 7-1 serving as the upper bottom of the right trapezoid, a wedge welding end face 7-1-2 serving as the right trapezoid right angle side, a wedge inclined face 7-1-4 serving as the right trapezoid inclined side and wedge side wall planes 7-1-3 positioned on two sides of the wedge inclined face. The rubber node mounting hanging seat 7 is vertically welded and fixedly connected with the left end and the right end of the whole beam part through wedge welding end faces 7-1-2, the rubber node mounting hanging seat sleeve 7-2 is required to be provided with a bore hole 7-2-1 with phi 80 through two procedures of rough boring milling and fine boring milling, the left bore hole 7-2-1 and the right bore hole 7-1 are required to be coaxial, and the axes of the left bore hole and the right bore hole are required to be parallel to the end beam lower cover plate 1 and are also required to be perpendicular to the gear box hanging seat hole 6-3-1. The lower bottom length of the wedge base 7-1 right trapezoid is D2, and the whole length L2 of the rubber node mounting hanging seat 7 is equal to the whole length L2.
The end beam is formed by assembling and welding a cast and forged piece and a steel plate, the shape is irregular, and the gravity center is eccentric, so that the positions needing auxiliary supporting and positioning in the welding process are more, and a plurality of positions to be processed interfere with the supporting positions, so that the selection of the processing and positioning reference becomes a difficult problem. When the welding positioning fixture is developed, the selection of a reasonable positioning reference is very important. Because the welding area of the front end beam A is relatively large and welding deformation is easy to generate, in order to ensure the perpendicularity between the center and the side surface of the boring hole 7-2-1 and the requirement of coaxiality between the left boring hole 7-2 and the right boring hole 1, the milling of the wedge welding end face 7-1-2 and the axial inner and outer end faces of the rubber node installation seat sleeve 7-2 is finished only by one clamping, the boring hole is used for processing the boring hole 7-2-1 of the rubber node installation seat sleeve 7-2, and finally the gearbox hanging seat hole 6-3-1 is drilled, so that the processed parts meet the requirement of drawing.
The existing machining positioning mode adopts an industrial clamp to clamp and fix the front end beam workpiece, so that the stability of the center and the clamping force meet the standard are ensured, the positions of the clamp and the workpiece are always blocked and interfered with each other when the machining positions are required to be machined, a plurality of sets of tools are needed to be adopted, different clamping modes and clamping positions are changed, the workpiece is machined through rolling and turning, and a plurality of steps are finished.
In order to ensure the machining quality of parts, the machining efficiency of the parts needs to be improved, the number of positioning fixtures and the occupied time of machining center equipment are saved, and the development of an end beam machining positioning fixture is urgently needed to realize the production requirement that the machining of all parts of an end beam can be completed by one-step clamping.
Disclosure of Invention
The invention provides a processing and positioning fixture for an end beam of a low floor bogie, which aims to solve the technical problems that an existing front end beam of a certain bogie is provided with a multi-bending, large-size and easily deformed asymmetric multi-inclined-plane special-shaped I-shaped cross beam structure, a rubber node mounting hanging seat welded at the left end and the right end of the front end beam is provided with a complex wedge-shaped block structure, so that a wedge base of the rubber node mounting hanging seat, a milling procedure of the end surface of the rubber node mounting seat and a boring procedure of the rubber node mounting seat cannot be implemented at one time due to the fact that a unified processing standard cannot be established with a machine tool, and further the existing process cannot complete reasonable clamping and positioning of the front end beam by only one clamping.
The low floor bogie end beam machining positioning fixture comprises a machine tool butt joint base, two sets of rubber node installation hanging seat positioning devices and one set of gear box hanging seat positioning device, wherein the two sets of rubber node installation hanging seat positioning devices are respectively positioned at the left side and the right side of the gear box hanging seat positioning device, the three rubber node installation hanging seat positioning devices are arranged in parallel with each other, and the bottoms of the three rubber node installation hanging seat positioning devices are fixedly connected with the upper end face of the machine tool butt joint base in a welding mode.
The rubber node installation hanging seat positioning device comprises a rubber node installation hanging seat positioning mechanism and a rubber node installation hanging seat compacting plate, wherein the rubber node installation hanging seat positioning mechanism comprises a U-shaped frame, a wedge side wall supporting bolt and a wedge front end face lateral positioning bolt, the U-shaped frame comprises a base cross beam, a first upright post and a rubber node installation hanging seat outer circle positioning upright post which are integrally formed, the bottom of the first upright post and the lower end of the rubber node installation hanging seat outer circle positioning upright post are respectively and fixedly connected with two ends of the base cross beam, and the bottom of the base cross beam is fixedly connected with the end face of a machine tool butt joint base; the center of the upper end face of the base beam is provided with a vertical wedge side wall supporting bolt threaded blind hole, the wedge side wall supporting bolt is in threaded connection with the wedge side wall supporting bolt threaded blind hole, the outer side wall of the first upright is provided with a transverse wedge front end face lateral positioning bolt threaded through hole, the wedge front end face lateral positioning bolt penetrates through the wedge front end face lateral positioning bolt threaded through hole from outside to inside and is in threaded connection with the wedge front end face lateral positioning bolt threaded through hole, the tops of the first upright and the rubber node installation hanging seat outer circle positioning upright are respectively provided with a vertical threaded hole, the rubber node installation hanging seat pressing plate comprises a rubber node installation hanging seat pressing plate beam, a wedge side wall pressing block and two rubber node installation hanging seat pressing plate connecting bolts, the wedge side wall pressing block is vertically and fixedly connected with the middle part of the lower end face of the rubber node installation hanging seat pressing plate beam, the two wedge side wall pressing blocks are integrally formed, two ends of the upper end face of the rubber node installation hanging seat pressing plate beam are respectively provided with a rubber node installation hanging seat pressing plate vertical through hole, the two rubber node installation hanging seat pressing plate connecting bolts respectively penetrate through corresponding vertical through holes of the rubber node installation hanging seat pressing plates and are respectively in threaded connection with corresponding vertical threaded holes in the tops of the first upright post and the rubber node installation hanging seat outer circle positioning upright post in a detachable mode.
The side wall of the outer circle positioning upright post of the rubber node installation hanging seat, which is positioned on the inner side of the U-shaped frame, is provided with a V-shaped groove with a transverse opening, and the minimum distance value D4 of the first upright post and the upper part of the outer circle positioning upright post of the rubber node installation hanging seat is more than L2.
The gearbox hanging seat positioning device comprises a gearbox hanging seat positioning mechanism and a gearbox hanging seat pressing plate, wherein the gearbox hanging seat positioning mechanism comprises a concave-shaped frame, end beam lower cover plate lateral positioning bolts and gearbox hanging seat vertical plate lateral positioning bolts, the concave-shaped frame comprises a concave-shaped frame base beam and two second upright posts which are integrally formed, the two second upright posts are vertically and fixedly connected to two ends of the concave-shaped frame base beam, the three second upright posts form a Chinese character's concave structure, the bottom of the concave-shaped frame base beam is fixedly connected with the end face of a machine tool butt joint base, the outer side wall of each second upright post is provided with a second upright post transverse through hole, the gearbox hanging seat vertical plate lateral positioning bolts and the end beam lower cover plate lateral positioning bolts penetrate through a corresponding second upright post transverse through hole from outside to inside respectively and are in threaded connection with the corresponding second upright post transverse through holes, the top of each second upright post is uniformly provided with a second upright post vertical threaded hole, the gearbox hanging seat pressing plate comprises a transverse plate, a gearbox hanging seat pressing block and two linking bolts, the gearbox hanging seat pressing block is vertically and fixedly connected to the middle part of the lower end face of the transverse plate vertical through the transverse plate, the two vertical through holes are formed by the transverse plate vertical through the corresponding to the two transverse screw holes, and the two vertical through holes are respectively connected with the corresponding transverse screw holes, and the two vertical through the transverse plates are respectively and can be detachably connected with the corresponding to the transverse screw holes.
The distance from the gearbox hanging seat positioning device to the rubber node installation hanging seat positioning device far away from the gearbox hanging seat positioning device is L3, and then L1 is more than or equal to L3 and less than or equal to L1+D1+D2/2.
The positioning fixture for machining the end beam of the low-floor bogie has the advantages that the positioning fixture is fixedly connected to the upper end of a butting base of a machine tool, two sets of rubber node installation hanging seat positioning devices are respectively positioned on the left side and the right side of the gear box hanging seat positioning devices, the distance value L3 from the gear box hanging seat positioning devices to the rubber node installation hanging seat positioning devices far away from the gear box hanging seat positioning devices meets the dimensional relation of L1-L3-L1 +D1+D2/2, the dimensional chain parameter setting can ensure that the gear box hanging seat positioned at the middle section of the front end beam A but positioned at the asymmetric center position can exactly fall into a concave-shaped frame on the gear box hanging seat positioning devices, the lateral positioning bolts of the lower cover plate of the end beam and the lateral positioning bolts of the vertical plate of the gear box hanging seat can respectively prop against the corresponding end faces of the lower cover plate of the end beam and the upper cover plate of the gear box hanging seat in the front and the rear side, and the gear box hanging seat pressing block can avoid the side wall from the side wall of the long beam structure and press the upper end of the corresponding small plate assembled with the long vertical plate from top down, so that the gear box hanging seat positioning mechanism can reliably fix the gear box hanging seat and the front end beam A in a forward side turnover 90 degrees. Meanwhile, the wedge side wall supporting bolts supported at the bottom of the wedge side wall plane and the wedge side wall compressing blocks compressed above the front upward wedge side wall plane are used for vertically positioning the wedge base, so that the integral structure of the front end beam A is accurately and reliably fixedly connected in the processing and positioning clamp of the end beam of the low-floor bogie, and the adjustable positioning screws are easy to assemble, disassemble and finely adjust in distance, so that labor intensity of operators in repeated operation is reduced. The vertical pressure of the wedge block side wall compacting block can improve the positioning precision of the rubber node installation hanging seat positioning mechanism on the rubber node installation hanging seat, and can provide stress generated by rotation of the boring and milling cutter in the boring and milling process, so that the rubber node installation hanging seat has self-locking property in the boring and milling process, and the processing precision is effectively improved.
The invention fully considers and utilizes the rubber node installation seat sleeve of the wedge block base and the complex structural characteristics, carefully selects the available datum plane and the structural characteristics for positioning, and skillfully designs the corresponding clamping structure and the position relation layout under the forward integral side turning 90-degree posture of the front end beam A on the basis, thereby effectively avoiding the troublesome problem that the positioning clamp and the processing position are blocked and interfered with each other on the premise of ensuring the reliable positioning of a workpiece, realizing the one-time fastening and positioning of the asymmetric multi-inclined-plane special I-shaped beam structure with multiple bending, large size and large welding deformation, and realizing the 'datum unification' between the processing coordinate system of a numerical control machine tool and the actual coordinate system of a special workpiece. And the effective conversion and unification between the workpiece coordinate system and the machining of the numerical control machine tool are realized through the reference coordinate system of the positioning clamp, so that a reliable process foundation is laid for processing all process nodes at one time. The positioning fixture for machining the end beam can finish machining all parts of the end beam on one set of fixture, completely overcomes the defects that a plurality of sets of fixtures are needed to be adopted in the prior art, different clamping modes and clamping positions are changed, and a complicated and lagging method for machining a workpiece can be finished only by a plurality of steps.
In addition, the end beam processing and positioning clamp for the low-floor bogie has the advantages of simple and practical structure, convenience in operation, low cost, convenience in popularization and the like.
Drawings
FIG. 1 is a schematic perspective view of a prior art front end beam in an installed attitude on a train;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of the explosive assembly of FIG. 1;
FIG. 4 is a schematic diagram of an explosive assembly of a prior art front end beam after flip up and down;
FIG. 5 is a front view, a top view and a schematic perspective view of a conventional rubber node mounting hanger;
FIG. 6 is a perspective view of a locating fixture for machining an end beam of a low floor truck in accordance with the present invention;
FIG. 7 is a top view of FIG. 6;
FIG. 8 is an enlarged partial view of section I of FIG. 6;
FIG. 9 is a front view of the rubber node mount hanger positioning apparatus of the present invention;
FIG. 10 is a schematic perspective view of a positioning device for a hanger bracket of a gearbox according to the present invention;
FIG. 11 is a schematic illustration of the application of the locating clamp of the present invention for machining end beams of a low floor truck;
FIG. 12 is a top view of FIG. 11;
fig. 13 is a front view of fig. 11;
Fig. 14 is a cross-sectional view of the position A-A of fig. 13.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 6 to 10, the positioning fixture for machining the end beam of the low-floor bogie comprises a machine tool docking base 10, two sets of rubber node installation hanging seat positioning devices and one set of gear box hanging seat positioning device, wherein the two sets of rubber node installation hanging seat positioning devices are respectively positioned at the left side and the right side of the gear box hanging seat positioning device, the three rubber node installation hanging seat positioning devices are arranged in parallel with each other, and the bottoms of the three rubber node installation hanging seat positioning devices are welded and fixedly connected with the upper end face of the machine tool docking base 10.
The rubber node installation hanging seat positioning device comprises a rubber node installation hanging seat positioning mechanism 8 and a rubber node installation hanging seat compacting plate 9, wherein the rubber node installation hanging seat positioning mechanism 8 comprises a U-shaped frame, a wedge block side wall supporting bolt 8-4 and a wedge block front end surface lateral positioning bolt 8-5, the U-shaped frame comprises a base cross beam 8-1, a first upright post 8-2 and a rubber node installation hanging seat excircle positioning upright post 8-3 which are integrally formed, the bottom of the first upright post 8-2 and the lower end of the rubber node installation hanging seat excircle positioning upright post 8-3 are fixedly connected with two ends of the base cross beam 8-1 respectively, the bottom of the base cross beam 8-1 is fixedly connected with the end surface of a machine tool butt joint base 10, the center of the upper end surface of the base cross beam 8-1 is provided with a vertical side wall supporting bolt threaded blind hole 8-1, the wedge block side wall supporting bolt 8-4 is in threaded connection with the side wall supporting bolt threaded blind hole 8-1-1, the outer side wall of the first upright post 8-2 is provided with a transverse wedge block front end surface lateral positioning bolt threaded through hole 8-2-1, the wedge block front end surface lateral positioning bolt 8-5 is vertically connected with the two wedge block front end surface lateral positioning upright posts 8-2-9 from the inner end surface of the base cross beam 8-1 and the rubber node installation hanging seat 8-9 and the compacting plate 9 is connected with the rubber node installation hanging seat 8-9 through the side wall positioning through the side wall through hole 9 and the side wall supporting seat 8-3 and the rubber node installation hanging seat 3 and the top of the rubber node installation hanging seat and the rubber node installation hanging seat 9 is arranged, the two ends of the upper end face of the rubber node installation hanging seat pressing plate beam 9-1 are respectively provided with a rubber node installation hanging seat pressing plate vertical through hole, and two rubber node installation hanging seat pressing plate connecting bolts 9-3 respectively penetrate through a corresponding rubber node installation hanging seat pressing plate vertical through hole and are respectively in threaded connection with a first upright post 8-2 and a corresponding vertical threaded hole 8-6 at the top of a rubber node installation hanging seat excircle positioning upright post 8-3 in a detachable mode.
The side wall of the outer circle positioning upright post 8-3 of the rubber node installation hanging seat, which is positioned at the inner side of the U-shaped frame, is provided with a V-shaped groove 8-3-1 with a transverse opening, and the minimum distance value D4 of the first upright post 8-2 and the upper part of the outer circle positioning upright post 8-3 of the rubber node installation hanging seat is more than L2.
The gearbox hanging seat positioning device comprises a gearbox hanging seat positioning mechanism 11 and a gearbox hanging seat compacting plate 12, wherein the gearbox hanging seat positioning mechanism 11 comprises a concave-shaped frame, an end beam lower cover plate lateral positioning bolt 11-3 and a gearbox hanging seat vertical plate lateral positioning bolt 11-4, the concave-shaped frame comprises a concave-shaped frame base cross beam 11-1 and two second upright posts 11-2 which are integrally formed, the two second upright posts 11-2 are vertically and fixedly connected to two ends of the concave-shaped frame base cross beam 11-1, the three of the concave-shaped frame base cross beam 11-1 and the end face of a machine tool docking base 10 are fixedly connected; the outer side wall of each second upright post 11-2 is provided with a second upright post transverse through hole 11-2-1, a gear box hanging seat upright plate lateral positioning bolt 11-4 and an end beam lower cover plate lateral positioning bolt 11-3 respectively penetrate through a corresponding second upright post transverse through hole 11-2-1 from outside to inside and are in threaded connection with the corresponding second upright post transverse through hole, the top of each second upright post 11-2 is respectively provided with a second upright post vertical threaded hole, a gear box hanging seat compacting plate 12 comprises a transverse plate 12-1, a gear box hanging seat pressing block 12-2 and two linking bolts 12-3, the gear box hanging seat pressing block 12-2 is vertically fixedly connected to the middle part of the lower end face of the transverse plate 12-1, the gear box hanging seat pressing block 12-2 and the end beam lower cover plate lateral positioning bolts 11-3 jointly form a T-shaped structure, two ends of the transverse plate 12-1 are respectively provided with transverse plate vertical through holes, the two linking bolts 12-3 respectively penetrate through a corresponding transverse plate vertical through holes, and is detachably connected with a corresponding vertical threaded hole of the second upright post in a threaded manner.
The distance from the gearbox hanging seat positioning device to the rubber node installation hanging seat positioning device far away from the gearbox hanging seat positioning device is L3, and then L1 is more than or equal to L3 and less than or equal to L1+D1+D2/2.
In the concrete application of the positioning fixture for machining the end beam of the low-floor bogie, as shown in fig. 11 to 14, the rubber node installation hanging seat pressing plate 9 is firstly removed from the rubber node installation hanging seat positioning mechanism 8, the gear box hanging seat pressing plate 12 is removed from the gear box hanging seat positioning mechanism 11, then the front end beam A is integrally turned by 90 degrees to enable the gear box hanging hole seat 6-3 to face upwards, and then the front end beam A in the posture is hoisted and falls into the positioning fixture for machining the end beam of the low-floor bogie.
As shown in fig. 14, the wedge side wall supporting bolts 8-4 are used for supporting the bottom of the wedge side wall plane 7-1-3 facing downwards at present, the arc surface of the outer diameter end of the rubber node seat cover 7-2 is limited by the V-shaped grooves 8-3-1 with transverse openings, the lateral positioning bolts 8-5 of the front end surface of the wedge are rotated to enable the lateral positioning bolts to laterally prop against the rear of the wedge front end surface 7-1 in the current state, finally, the two rubber node installation hanging seat pressing plate connecting bolts 9-3 are used for installing the rubber node installation hanging seat pressing plate 9 above the rubber node installation hanging seat positioning mechanism 8, the wedge side wall plane 7-1-3 facing upwards at present is pressed downwards by the wedge side wall pressing blocks 9-2, and therefore complete fastening and positioning of the rubber node installation hanging seat 7 in the rubber node installation hanging seat positioning device are completed.
As shown in fig. 11 to 13, the front end beam a in the posture is characterized in that the gear box hanging seat 6 just falls into the concave frame, the end beam lower cover plate 1 and the gear box hanging seat upper cover plate 6-1 in the vertical state are both located on the concave frame base cross beam 11-1, the end beam lower cover plate lateral positioning bolts 11-3 and the gear box hanging seat vertical plate lateral positioning bolts 11-4 in the horizontal direction on the two second upright posts 11-2 are respectively propped against the corresponding end surfaces of the end beam lower cover plate 1 and the gear box hanging seat upper cover plate 6-1 from the front side and the rear side, the gear box hanging seat pressing plate 12 is fixedly connected to the tops of the two second upright posts 11-2 through the two connecting bolts 12-3, the gear box hanging seat pressing block 12-2 avoids the side wall from the side where the long cross beam structure is located by the gear box hanging hole seat 6-3 and is pressed on the upper ends of the corresponding small flat plates 6-2-1 assembled with the long upright plates 4 from top to bottom, and the positioning of the gear box hanging seat positioning mechanism 11 and the front end beam a is completed.
After that, the machine tool butt-joint base 10 can be fixedly connected to a numerical control machine tool, and relative position coordinates among all parts of the end beam machining positioning fixture of the low floor bogie are input into the numerical control machine tool, so that the machining positioning fixture is utilized to establish unification between a machine tool machining coordinate system and a work price positioning coordinate system, and further, two working procedures of rough boring milling and finish boring milling of the boring 7-2-1 on the rubber node seat cover 7-2 by the numerical control machine tool and the machining process of forming the gearbox hanging seat hole 6-3-1 by axially drilling on the gearbox hanging seat 6-3 are completed on the premise of one-time clamping and positioning.
Claims (4)
1. The processing and positioning fixture for the end beam of the low-floor bogie is characterized by comprising a machine tool butt joint base (10), two sets of rubber node installation hanging seat positioning devices and one set of gear box hanging seat positioning device, wherein the two sets of rubber node installation hanging seat positioning devices are respectively positioned at the left side and the right side of the gear box hanging seat positioning device, the three are arranged in parallel with each other, and the bottoms of the three are welded and fixedly connected with the upper end face of the machine tool butt joint base (10);
the rubber node installation hanging seat positioning device comprises a rubber node installation hanging seat positioning mechanism (8) and a rubber node installation hanging seat compacting plate (9), wherein the rubber node installation hanging seat positioning mechanism (8) comprises a U-shaped frame, a wedge side wall supporting bolt (8-4) and a wedge front end surface lateral positioning bolt (8-5), the U-shaped frame comprises a base cross beam (8-1), a first upright post (8-2) and a rubber node installation hanging seat excircle positioning upright post (8-3) which are integrally formed, the bottom of the first upright post (8-2) and the lower end of the rubber node installation hanging seat excircle positioning upright post (8-3) are respectively fixedly connected with two ends of the base cross beam (8-1), the bottom of the base cross beam (8-1) is fixedly connected with the end surface of a machine tool butt joint base (10), the center of the upper end surface of the base cross beam (8-1) is provided with a vertical side wall wedge supporting bolt threaded blind hole (8-1-1), the side wall supporting bolt (8-4) is in threaded connection with the wedge side wall supporting bolt threaded blind hole (8-1-1), the outer end surface of the first upright post (8-2) is provided with a lateral wedge front side wall positioning bolt (8-1), the rubber node installation hanging seat compression plate (9) comprises a rubber node installation hanging seat compression plate cross beam (9-1), a wedge side wall compression block (9-2) and two rubber node installation hanging seat compression plate connecting bolts (9-3), the wedge side wall compression block (9-2) is vertically and fixedly connected to the middle part of the lower end face of the rubber node installation hanging seat compression plate cross beam (9-1), the two rubber node installation hanging seat compression plate cross beams (9-1) are integrally formed, two ends of the upper end face of each rubber node installation hanging seat compression plate cross beam (9-1) are respectively provided with a rubber node installation hanging seat compression plate vertical through hole, and each rubber node installation hanging seat compression plate connecting bolt (9-3) respectively penetrates through a corresponding rubber node installation hanging seat compression plate vertical through hole and is respectively connected with the corresponding threaded hole of the upper end face of each rubber node installation hanging seat (8-6) in a detachable mode.
2. The end beam machining positioning fixture for the low floor bogie according to claim 1, wherein the outer circle positioning upright post (8-3) of the rubber node installation hanging seat is provided with a V-shaped groove (8-3-1) with a transverse opening on the side wall positioned on the inner side of the U-shaped frame, the minimum distance value D4 of the first upright post (8-2) and the upper part of the outer circle positioning upright post (8-3) of the rubber node installation hanging seat is greater than L2, and L2 is the whole length of the rubber node installation hanging seat (7).
3. The end beam machining positioning fixture for the low floor bogie is characterized in that the gear box hanging seat positioning device comprises a gear box hanging seat positioning mechanism (11) and a gear box hanging seat pressing plate (12), the gear box hanging seat positioning mechanism (11) comprises a concave-shaped frame, an end beam lower cover plate lateral positioning bolt (11-3) and a gear box hanging seat vertical plate lateral positioning bolt (11-4), the concave-shaped frame comprises an integrally formed concave-shaped frame base cross beam (11-1) and two second upright posts (11-2), the two second upright posts (11-2) are vertically and fixedly connected to two ends of the concave-shaped frame base cross beam (11-1), the three of the gear box hanging seat positioning mechanism (11) jointly form a Chinese character's concave-shaped structure, and the bottom of the concave-shaped frame base cross beam (11-1) is fixedly connected with the end face of a machine tool docking base (10); the outer side wall of each second upright post (11-2) is provided with a second upright post transverse through hole (11-2-1), a gear box hanging seat upright plate lateral positioning bolt (11-4) and an end beam lower cover plate lateral positioning bolt (11-3) respectively penetrate through a corresponding second upright post transverse through hole (11-2-1) from outside to inside and are in threaded connection with the corresponding second upright post transverse through hole, the top of each second upright post (11-2) is respectively provided with a second upright post vertical threaded hole, and a gear box hanging seat compacting plate (12) comprises a transverse plate (12-1), the gear box hanging seat pressing block (12-2) and two linking bolts (12-3), wherein the gear box hanging seat pressing block (12-2) is vertically and fixedly connected to the middle of the lower end face of the transverse plate (12-1), the gear box hanging seat pressing block and the middle form a T-shaped structure together, transverse plate vertical through holes are respectively formed in two ends of the transverse plate (12-1), and the two linking bolts (12-3) penetrate through corresponding transverse plate vertical through holes respectively and are in detachable threaded connection with corresponding second upright vertical threaded holes.
4. The end beam machining positioning fixture for the low floor bogie according to claim 3, wherein the distance from the gearbox hanging seat positioning device to the rubber node installation hanging seat positioning device far away from the gearbox hanging seat positioning device is L3, L1 is not less than L3 is not more than L1+ (D1+D2)/2, L1 is the length of a long cross beam structure with an I-shaped cross section, D1 is the width of a small flat plate (6-2-1) on the side wall of a gearbox hanging seat vertical plate (6-2), and D2 is the length of the bottom of a right trapezoid of a wedge base (7-1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311415085.5A CN117359348B (en) | 2023-10-29 | 2023-10-29 | Positioning fixture for machining end beam of low-floor bogie |
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| CN202311415085.5A CN117359348B (en) | 2023-10-29 | 2023-10-29 | Positioning fixture for machining end beam of low-floor bogie |
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| CN114111504A (en) * | 2021-11-04 | 2022-03-01 | 中车南京浦镇车辆有限公司 | End beam motor hanging seat installation and detection integrated device and installation and detection method |
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| DE4229253A1 (en) * | 1992-09-02 | 1994-03-03 | Gross & Froelich Gmbh & Co Kg | Cramp with auxiliary clamp - has open sided slots through guide sleeve and clamping plunger so that it can be pushed on rail from side and assembly completed by clipping on actuating screw and coupling bush |
| CN105290844A (en) * | 2015-11-30 | 2016-02-03 | 中国北车集团大同电力机车有限责任公司 | Special clamp for two-process machining of draw bar |
| CN216939565U (en) * | 2022-03-22 | 2022-07-12 | 中车青岛四方机车车辆股份有限公司 | Clamping device is used in cantilever structure processing |
| CN115070448A (en) * | 2022-06-29 | 2022-09-20 | 天润工业技术股份有限公司 | Clamp for casting beam |
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| CN114111504A (en) * | 2021-11-04 | 2022-03-01 | 中车南京浦镇车辆有限公司 | End beam motor hanging seat installation and detection integrated device and installation and detection method |
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