Changchun Railway Vehicles Co.

Changchun, China

Changchun Railway Vehicles Co.

Changchun, China

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Wang H.,Changchun Railway Vehicles Co.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2015

In order to resolve the disadvantages such as poor appearance quality, poor tightness, low efficiency of resistance spot welding of stainless steel rail vehicles, partial penetration lap laser welding process was investigated widely. But due to the limitation of processing technology, there will be local incomplete fusion in the lap laser welding seam. Defect rate is the ratio of the local incomplete fusion length to the weld seam length. The tensile shear strength under different defect rate and its effect on the car body static strength are not clear. It is necessary to find the biggest defect rate by numerical analysis of effects of different defect rates on the laser welding stainless steel rail vehicle body structure strength,and tests of laser welding shear tensile strength. © 2015 SPIE.


Patent
CHANGCHUN RAILWAY VEHICLES Co. | Date: 2011-07-12

The utility model provides a combined positioning device for a side beam of a stainless steel car roof, comprising an inner cavity positioning block (2), an external support body (3), an external positioning block (4), a push rod (5), and clamps (6), a top side of the inner cavity positioning block (2) fits in with a top inner portion of the side beam (7) of the car roof, the external support body (3) is adjustably connected to a surface of the inner cavity positioning block (2), the external positioning block (4) is adjustably connected to a surface of the external support body (3), an elongated nut of the push rod (5) is integrated with the inner cavity positioning block (2), and the clamps (6) are used to clamp two edges of the side beam (7) of the car roof. With the present utility model, the side beam of the car roof can be supported by fitting the inner cavity positioning block in with the top inner portion of the side beam of the car roof, and sizes such as width and height can be adjusted through adjustments of the external support body connected to the inner cavity positioning is block, the external positioning block and the clamps.


Patent
Changchun Railway Vehicles Co. | Date: 2011-12-02

A safety protection device for the roof construction of a train body assembly comprises two arch bridge shaped transverse walking boards and a safety rope, wherein the safety rope is fixed between the span of the two arch bridge shaped transverse walking boards. The invention has the following benefit effects: the safety for the worker walking and working on the roof can be guaranteed since the worker walks up to the roof through the arch bridge shaped transverse walking boards and ties the other end of a safety belt which is tied on him to the safety rope.


A full butt joint structure of a connection joint between a side frame and a cross beam of a bogie frame, characterized in: the side frame is connected to the cross beam by a connecting seat to realize the full butt joint, a side frame connecting end of the connecting seat, a transport column and a side frame inside vertical plate form a plate-plate butt joint structure, and a cross beam connecting end of the connecting seat and the cross beam form a tube-tube butt joint structure. An assembly welding process comprises: the connecting seat is assembled and welded to the cross beam; a cross beam unit is assembled and welded; the connecting seat is assembled and welded to the transport column and the side frame inside vertical plate; a side frame strengthen partition plate is assembled and welded to an upper plate; and the bogie frame is welded.


Patent
Changchun Railway Vehicles Co. | Date: 2013-04-29

A method of processing a gear reduction box is disclosed. Taking the outer wall of the driving gear hole on the gear reduction box as a reference, scribing the center O_(2 )of the driving gear hole, and scribing the center O_(1 )of the driven gear hole, then extending the connecting line O_(2)O_(1 )to two ends A and B of the gear reduction box body, and punching sample holes to facilitate alignment with a scribing needle. The gear reduction box is hanged on a processing jig, and the gear box is rotated as a whole by left-right movement of the left adjustable support assembly and up-down movement of the right adjustable support assembly, thereby the center O_(2 )of the driving gear hole and the center O_(1 )of the driven gear hole form a horizontal line. The connecting line O_(2)O_(1 )and a work table of the machine tool are horizontal.


Patent
CHANGCHUN RAILWAY VEHICLES Co. | Date: 2011-07-12

The utility model provides an apparatus for correcting upwarp deformation of a large member (11) of a stainless steel car roof, being characterized in that, comprising a crossbeam (1), end support columns (2), a middle support column (3), an arc-shaped positioning body (5), crossbeam pull rings (7), a thin steel taut strap (8), and tighteners (9), the end support columns (2), the crossbeam (1), and the middle support column (3) constitute a supporting part, the arc-shaped positioning body having the same arc shape as an inner arc of the large member of the stainless steel car roof is arranged on the middle support column (3), the thin steel taut strap (8) covers an exterior contour surface of the large member (11) of the stainless steel car roof, and is connected via the tightener (9) to the crossbeam pull rings (7) respectively fixed at two ends of the crossbeam (1). The apparatus can solve the problem of upwarp deformation of the large member of the stainless steel car roof, and restore the arc shape of the car roof and the car width.


Patent
Changchun Railway Vehicles Co. | Date: 2011-12-02

A movable measuring ruler device for measuring an external contour precision of a vehicle body comprising a movable trolley with a rail and an upright detecting ruler, wherein the upright detecting ruler is fixed on a frame of the movable trolley. The advantageous effect of the present invention lies in that measurement of external contour or intended parts of the vehicle body can be accomplished during rail traveling of the movable trolley, which is installed in parallel with the longitudinal center axis of a vehicle body and includes an upright detecting ruler, thereby a quick and accurate measurement is achieved.


A weight reduction re-profiling process after dynamic balance for a wheel set of a passenger train, comprising the following steps: designing a spindle end clamp and a tailstock end clamp according to structures of screw holes on an end of train axle; fixing the spindle end clamp to the train axle; hanging up the wheel set, aligning a center hole of the spindle end clamp with a top tip of a spindle end of a lathe, and inserting a handle portion of the spindle end clamp into a drive plate hole; aligning an eccentric hole of the tailstock end clamp with a scribed line on an end for weight reduction after dynamic balance by visual inspection, then sheathing the tailstock end clamp on the train axle, aligning a top tip of tailstock of the lathe with the eccentric hole of the tailstock end clamp, and tightening them; and so on.


Patent
Changchun Railway Vehicles Co. | Date: 2013-05-24

A processing method for variable drilling-depth, deep-hole chip breaking and removal, comprising: assigning a deep-hole drilling variable value; if the value is correct, drilling a first hole depth; otherwise, alarming and reassigning the value; determining whether the first hole depth is greater than a terminal drilling depth and whether the first hole depth is greater than the defined chip breaking depth; if yes, processing chip breaking and drilling to the currently designated drilling depth and then returning to a safe position for chip removal; determining whether the currently designated drilling depth is greater than a smallest drilling depth, if yes, decreasing the drilling depth progressively according to a designated drilling depth proportion, otherwise, designating the currently designated drilling depth as a new smallest drilling depth and calculating the coordinate of the next drilling depth. Drilling deep hole in accordance with this method can improve efficiency and guarantee drilling safety.


Patent
CHANGCHUN RAILWAY VEHICLES Co. | Date: 2011-07-12

The utility model provides a frame assembly base for frame structures, being characterized in that, a longitudinal beam and a transverse beam, the transverse beam and an intermediate beam, the intermediate beam and a transverse reinforcing beam, and the longitudinal beam and the transverse reinforcing beam are all connected by bolts, and connecting blocks are provided at connections between the longitudinal beam and the transverse beam and between the longitudinal beam and the transverse reinforcing beam. In the present utility model, bolt connections are used throughout the base, and connecting blocks are provided at the connections between the longitudinal beam and the transverse beam and between the longitudinal beam and the transverse reinforcing beam, so that frame widths can be adjusted to be adapted to assembling of frames having different widths by adjusting widths of the connecting blocks, thereby saving manufacturing costs of tooling, reducing difficulties of tooling storage and management. The base is detachable to facilitate storage and management.

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