CN210280534U

CN210280534U - Asymmetric section steel rail upsetting device

Info

Publication number: CN210280534U
Application number: CN201920476678.5U
Authority: CN
Inventors: 王子舒; 施庆峰; 李志龙; 李琪; 高银霞; 付涛; 张立涛
Original assignee: China Railway Baoji Bridge Group Co Ltd
Current assignee: China Railway Baoji Bridge Group Co Ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2020-04-10
Anticipated expiration: 2029-04-10

Abstract

An upper template and a lower template of a steel rail upsetting device with an asymmetric section are connected through a guide device, two upper dies and two lower dies are arranged between the upper template and the lower template, the two upper dies are fixed on the lower end surface of the upper template, the two lower dies are fixed on the upper end surface of the lower template, and the two upper dies are respectively positioned right above the two lower dies; the two upper dies and the two lower dies are matched to form two cavities respectively, each cavity is formed by a clamping cavity section, an upsetting cavity section and a guiding cavity section in sequence, and the clamping cavity section, the upsetting cavity section and the guiding cavity section are in a close fit state, a clearance fit state and a sliding fit state with the steel rail to be upset respectively; two upsetting oil cylinders are fixed on the lower template, and the piston ends of the two upsetting oil cylinders are respectively opposite to the two guide cavity sections. The utility model discloses a whole upset thickness of different product types of asymmetric section rail is accomplished to one set of frock mould, utilizes ball to delete digital display system accurate control rail upset volume simultaneously, satisfies the process design requirement.

Description

Asymmetric section steel rail upsetting device

Technical Field

The utility model belongs to the technical field of the rail is made, concretely relates to asymmetric section rail jumping-up device.

Background

The steel rails are the main components of the railway track and are very complex to bear when used on the track. In order to meet the requirements of high speed, heavy load and long service life of railway transportation, rail types with different cross-sectional shapes are designed at different rail positions according to the stress characteristics of the steel rail so as to resist the acting force acting on the steel rail, so that the railway transportation is stable and firm, and the steel rail has quite long service life. The rail with the asymmetric section is a special type short section rail (AT rail) which is widely applied. In order to meet the connection of rails with different sections, the rails with asymmetric sections need to be subjected to forging forming after upsetting and gathering materials.

Because the instability is easy to occur when the asymmetric section is subjected to compressive stress, the steel rail is bent, and the later forging forming is folded. At present, the local upsetting of the asymmetric steel rail is mainly carried out by using special upsetting equipment and adopting a sectional heating and sectional upsetting mode. The heating length of each section is 80mm, the upsetting amount is 15-18mm, and the process design requirement is met by heating and upsetting each section for multiple times. The specific operation is as follows: the steel rail is placed into special upsetting equipment by using a hoisting machine, the section to be upset passes through a self-made electric induction coil, the end of the section to be upset is contacted with an upsetting oil cylinder rod for providing driving, the other end of the section to be upset is contacted with a plug of an upsetting machine, and the plug resists the upsetting force of an upsetting oil cylinder. And heating the steel rail by using the induction coil, starting an upsetting oil cylinder to perform upsetting after the steel rail is heated to a preset temperature, moving the induction coil after the upsetting is in place, and performing upsetting of the next section until the upsetting amount reaches the process design size. The method has the advantages that instability is easy to occur in the upsetting process, steel rails are bent, waste products are produced, the shape of the section of the head of the upset rail is not uniform after upsetting, rail limbs are warped and deformed, and the later forging forming is easy to fold. On the other hand, the rear end plug is adopted to resist upsetting force, so that the upsetting device is only suitable for the steel rail with short length, and meanwhile, special upsetting equipment, an electric induction heating system, a press machine, a special movable induction coil and the like need to be designed, so that the occupied area is large, and the production cost investment is high.

Disclosure of Invention

The utility model provides an asymmetric section rail upsetting device to overcome prior art not enough, satisfy asymmetric section rail upsetting process requirement.

The utility model adopts the technical proposal that: a steel rail upsetting device with an asymmetric section comprises an upper template and a lower template, wherein the upper template is connected with an upper workbench of an external press, the lower template is connected with a lower workbench of the external press, and the upper template is connected with the lower template through a guide device; a first upper die, a first lower die, a second upper die and a second lower die are arranged between the upper template and the lower template, the first upper die and the second upper die are fixed on the lower end surface of the upper template, the first lower die and the second lower die are fixed on the upper end surface of the lower template, the first upper die is positioned right above the first lower die, and the second upper die is positioned right above the second lower die; the first upper die and the first lower die, and the second upper die and the second lower die form two cavities after being matched, each cavity is formed by a clamping cavity section, an upsetting cavity section and a guiding cavity section in sequence, and the clamping cavity section, the upsetting cavity section and the guiding cavity section are in a close fit state, a clearance fit state and a sliding fit state with the steel rail to be upset respectively; two upsetting oil cylinders are fixed on the lower template, the axes of the two upsetting oil cylinders are respectively superposed with the central lines of the two cavities, and the piston ends of the two upsetting oil cylinders are respectively opposite to the two guide cavity sections.

Three transverse wall plates and a longitudinal wall plate fixedly connected with the tail ends of the three transverse wall plates are fixed on the lower template, the two upsetting oil cylinders are arranged in two separate cavities formed by the three transverse wall plates, and the tails of the two upsetting oil cylinders are fixed with the longitudinal wall plate; the two upsetting oil cylinders are respectively clamped and fixed between the transverse wallboards through anti-rotating clamping plates.

And ball cutting rulers are respectively fixed on the outer walls of the two outer sides of the three transverse wallboards, reading heads of the ball cutting rulers are respectively fixed on the piston ends of the two upsetting oil cylinders, and a digital display device of the ball cutting rulers is fixed above the longitudinal wallboards.

The upper template, the lower template and the external press workbench are positioned through first positioning keys; and the first upper die, the second upper die and the lower end surface of the upper template are positioned through second positioning keys, and the first lower die, the second lower die and the upper end surface of the lower template are positioned through second positioning keys.

The guiding device is in a guide pillar and guide sleeve mode.

Compared with the prior art, the utility model discloses beneficial effect who has:

the utility model discloses a whole upset thickness of different product types of asymmetric section rail is accomplished to one set of frock mould, utilizes ball to delete digital display system accurate control rail upset volume simultaneously, satisfies the process design requirement.

The utility model discloses the mould die cavity comprises clamping die chamber section, upsetting forming die chamber section and direction die cavity section, presss from both sides tight rail through clamping die chamber section, makes the rail can not the axial float, guarantees the upsetting shaping size through upsetting forming die chamber section, guarantees through direction die cavity section that the rail is unstable to warp, avoids the rail quality problems such as unstability warp, rail limb warp, can effectively guarantee the upsetting quality.

The utility model discloses with many times segmentation heating segmentation upset forging change into once heating, once whole upset forging shaping, improve upset forging efficiency greatly.

The utility model discloses utilize existing rail heating system, press and rail to forge income mould operating system, reduce equipment input, reduce cost. The production area of the upsetting process can be reduced on the process layout, and the process layout of a workshop is optimized.

Drawings

FIG. 1 is a sectional view of the structure of the present invention;

FIG. 2 is a top view of the structure of the present invention after the upper mold plate and the upper mold are removed;

FIG. 3 is a schematic structural view of a cavity section after mold assembly;

FIG. 4 is a sectional view of the clamping cavity section of the present invention;

FIG. 5 is a sectional view of the upset cavity section structure of the present invention;

FIG. 6 is a sectional view of the section structure of the guide cavity section of the present invention;

FIG. 7 is a schematic view of the structure of the upsetting cylinder of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings 1-7 and the detailed description thereof.

A steel rail upsetting device with an asymmetric section comprises an upper template 1 and a lower template 2, wherein the upper template 1 is connected with an upper workbench of an external press, the lower template 2 is connected with a lower workbench of the external press, and the upper template 1 is connected with the lower template 2 through a guide device 3; a first upper die 4, a first lower die 5, a second upper die 6 and a second lower die 7 are arranged between the upper template 1 and the lower template 2, the first upper die 4 and the second upper die 6 are fixed on the lower end surface of the upper template 1, the first lower die 5 and the second lower die 7 are fixed on the upper end surface of the lower template 2, the first upper die 4 is positioned right above the first lower die 5, and the second upper die 6 is positioned right above the second lower die 7; the first upper die 4 and the first lower die 5, and the second upper die 6 and the second lower die 7 are respectively formed into two cavities after die assembly, each cavity is sequentially formed by a clamping cavity section 8, an upsetting cavity section 9 and a guiding cavity section 10, and the clamping cavity section 8, the upsetting cavity section 9 and the guiding cavity section 10 are respectively in a close fit state, a clearance fit state and a sliding fit state with a steel rail 11 to be upset; two upsetting oil cylinders 12 are fixed on the lower template 2, the axes of the two upsetting oil cylinders 12 are respectively superposed with the central lines of the two cavities, and the piston ends 13 of the two upsetting oil cylinders 12 are respectively opposite to the two guide cavity sections 10.

The upper template 1, the lower template 2 and the external press workbench are positioned through a first positioning key 20; and the first upper die 4, the second upper die 6 and the lower end surface of the upper template 1 are positioned, and the first lower die 5, the second lower die 7 and the upper end surface of the lower template 2 are positioned through a second positioning key 21. The guiding device 3 is in the form of a guide post and a guide sleeve.

Three transverse wall plates 14 and a longitudinal wall plate 15 fixedly connected with the tail ends of the three transverse wall plates 14 are fixed on the lower template 2, the two upsetting oil cylinders 12 are arranged in two separated cavities formed by the three transverse wall plates 14, and the tail parts of the two upsetting oil cylinders 12 are fixed with the longitudinal wall plate 15; the two upsetting oil cylinders 12 are respectively clamped and fixed between the transverse wall plates 14 through anti-rotating clamping plates 16, so that the upsetting oil cylinders 12 are ensured not to rotate in the upsetting process. And ball plunger rulers 17 are respectively fixed on the outer walls of two outer sides of the three transverse wall plates 14, reading heads 18 of the ball plunger rulers 17 are respectively fixed on the piston ends 13 of the two upsetting oil cylinders 12, and a digital display device 19 of the ball plunger rulers 17 is fixed above the longitudinal wall plate 15.

The upper template 1, the lower template 2 and the external press workbench are positioned through a first positioning key 20; and the first upper die 4, the second upper die 6 and the lower end surface of the upper template 1 are positioned, and the first lower die 5, the second lower die 7 and the upper end surface of the lower template 2 are positioned through a second positioning key 21. So as to resist the axial upsetting force in the upsetting process and ensure that the tool does not move when being subjected to the axial upsetting force.

The utility model discloses the mould die cavity is formed by clamping die cavity section 8, upsetting die cavity section 9 and direction die cavity section 10 in proper order to make clamping die cavity section 8, upsetting die cavity section 9 and direction die cavity section 10 be tight fit state, clearance fit state and sliding fit state respectively with waiting to upset steel rail 11; the size of the die cavity of the upsetting cavity section 9 is designed according to the characteristics of the required steel rail product, the clamping cavity section 8 ensures that the steel rail does not generate axial movement in the upsetting process, and the guiding cavity section 10 ensures that the steel rail does not deform unstably in the upsetting process.

The utility model discloses an install two sets of upsetting die in same upper and lower template, upper and lower template sets up four sets of guider all around, satisfies the compound die precision and resists the skew requirement about the mould is horizontal, can realize two kinds of products of one set of frock shaping, satisfies asymmetric section rail upsetting requirement, changes the frock in the reduction production process, improves production efficiency. The utility model discloses install in workstation about the press, treat that the upset rail heating adopts the whole heating of induction electric heating system of follow-up forging shaping usefulness, will treat after the heating is accomplished that the upset rail moves into the lower mould chamber, the pressure effect that provides through the press compound die will treat that the upset rail presss from both sides tightly on the tight die cavity section, the lower mould, and the messenger treats that the upset rail does not take place the axial float. The pressure required by upsetting the steel rail is provided by an upsetting oil cylinder of a jack. The piston end of the upsetting oil cylinder acts on the end of the steel rail to be upset through the pier head 22 to carry out upsetting. The ball display digital display system is arranged at the piston end of the upsetting oil cylinder to display the stroke of the upsetting oil cylinder piston, so that the upsetting amount of the steel rail is accurately controlled, and the steel rail upsetting is finally completed.

The main process of integral upsetting is as follows: and (3) heating the steel rail part to be upset in an electric heating furnace, putting the heated part into an upsetting die cavity after heating, closing the die by a press machine in a downward mode, continuously maintaining the pressure after the pressure reaches a set pressure, and enabling the clamping section die to be tightly attached to the steel rail at the moment. And starting the upsetting oil cylinder, opening the ball cutting ruler and the display, driving the upsetting oil cylinder to apply upsetting force to act on the steel rail, and clamping the steel rail by the clamping section without axial movement. The steel rail heating part deforms under the action of upsetting force, is limited by the upsetting cavity of the die, does not bend, and quickly fills the upsetting cavity of the die. At the moment, the upsetting amount is accurately controlled by controlling the moving amount of the ball cutting ruler, and the upsetting quality of the steel rail is ensured. Two sets of upsetting die tools are arranged in the whole device, the asymmetric steel rail upsetting device is particularly suitable for asymmetric steel rail upsetting, and the requirement of upsetting the bilaterally symmetric steel rail can be finished on one set of device at one time. Two sets of devices are avoided, and meanwhile, frequent tool replacement in the upsetting process can be reduced, so that the labor intensity of workers is reduced, and the working efficiency is improved.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that all equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A steel rail upsetting device with an asymmetric section comprises an upper template (1) and a lower template (2), wherein the upper template (1) is connected with an upper workbench of an external press, the lower template (2) is connected with a lower workbench of the external press, and the upper template (1) is connected with the lower template (2) through a guide device (3); the method is characterized in that: a first upper die (4), a first lower die (5), a second upper die (6) and a second lower die (7) are arranged between the upper template (1) and the lower template (2), the first upper die (4) and the second upper die (6) are fixed on the lower end face of the upper template (1), the first lower die (5) and the second lower die (7) are fixed on the upper end face of the lower template (2), the first upper die (4) is located right above the first lower die (5), and the second upper die (6) is located right above the second lower die (7); the first upper die (4) and the first lower die (5), the second upper die (6) and the second lower die (7) are respectively formed into two cavities after die assembly, each cavity is sequentially formed by a clamping cavity section (8), an upsetting cavity section (9) and a guiding cavity section (10), and the clamping cavity section (8), the upsetting cavity section (9) and the guiding cavity section (10) are respectively in a close fit state, a clearance fit state and a sliding fit state with a steel rail (11) to be upset; two upsetting oil cylinders (12) are fixed on the lower template (2), the axes of the two upsetting oil cylinders (12) are respectively superposed with the central lines of the two cavities, and the piston ends (13) of the two upsetting oil cylinders (12) are respectively opposite to the two guide cavity sections (10).

2. The asymmetric cross-section steel rail upsetting apparatus as recited in claim 1, wherein: three transverse wall plates (14) and a longitudinal wall plate (15) fixedly connected with the tail ends of the three transverse wall plates (14) are fixed on the lower template (2), the two upsetting oil cylinders (12) are arranged in two separated cavities formed by the three transverse wall plates (14), and the tail parts of the two upsetting oil cylinders (12) are fixed with the longitudinal wall plate (15); the two upsetting oil cylinders (12) are respectively clamped and fixed between the transverse wallboards (14) through anti-rotating splints (16).

3. The asymmetric cross-section steel rail upsetting apparatus as recited in claim 2, wherein: ball cutting rules (17) are respectively fixed on the outer walls of two outer sides of the three transverse wall plates (14), reading heads (18) of the ball cutting rules (17) are respectively fixed on piston ends (13) of the two upsetting oil cylinders (12), and a digital display device (19) of the ball cutting rules (17) is fixed above the longitudinal wall plate (15).

4. The asymmetric cross-section steel rail upsetting apparatus as recited in claim 3, wherein: the upper template (1), the lower template (2) and the external press workbench are positioned through a first positioning key (20); and the first upper die (4), the second upper die (6) and the lower end face of the upper template (1) are positioned, and the first lower die (5), the second lower die (7) and the upper end face of the lower template (2) are positioned through a second positioning key (21).

5. The asymmetric cross-section steel rail upsetting apparatus as recited in claim 4, wherein: the guiding device (3) is in a guide pillar and guide sleeve mode.