CN107225150A - The new processing method and mould of a kind of variable cross-section track connecting plate - Google Patents
The new processing method and mould of a kind of variable cross-section track connecting plate Download PDFInfo
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- CN107225150A CN107225150A CN201710602361.7A CN201710602361A CN107225150A CN 107225150 A CN107225150 A CN 107225150A CN 201710602361 A CN201710602361 A CN 201710602361A CN 107225150 A CN107225150 A CN 107225150A
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- rolling
- mold
- connecting plate
- variable cross
- track connecting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
- B21H7/002—Fasteners, rivets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K7/00—Making railway appurtenances; Making vehicle parts
- B21K7/02—Making railway appurtenances; Making vehicle parts parts for permanent way
- B21K7/10—Making railway appurtenances; Making vehicle parts parts for permanent way rails joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/021—Twin mills
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- Agronomy & Crop Science (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of rolling of variable cross-section track connecting plate and finishing mold, including intermittent rolling mold and finish-forging finishing mold, a kind of new processing method of variable cross-section track connecting plate, including selection are additionally provided；Heating；First rolling, is made irregular section rolled blank；Secondary rolling, is made variable cross-section track connecting plate rolling prefabricated blank；Finish-forging finishing.This processing method can avoid the defect of the manufacturing process of casting at present and second displacement forging；Rolling deformation is continuous hydrostatic profile process, and metal fibrous tissue is evenly distributed, and fibr tissue is not switched off, while not impacting and vibrating in this process, it is ensured that the stability of the mechanical property of product.It is of great significance in railway casting production field tool.
Description
Technical field
The present invention relates to railway casting manufacturing process area, the more particularly to a kind of variable cross-section track connection in railway joint
The new processing method and mould of plate.
Background technology
Track connecting plate, also referred to as fish platee or road clamping plate, are the securing members for track and interorbital.Variable cross-section
Track connecting plate is as the important component in railway rail system, and used in the rail joint position of rail type not of the same race, its specification is not
One, but basic structure is close, the only difference in appearance and size.Because its present position is more special, to the peace of train operation
The very big influences of Quan Xingyou, therefore, its quality requirement is just particularly important, and it should have good mechanical property, such as anti-impact
Hit, it is anti-shearing, wear-resisting etc..
The conventional fabrication method of variable cross-section track connecting plate is mainly：Casting and forging and stamping.1st, for casting, in casting
Dense structure of portion degree is poor relative to rolling and forging, and often occurs that the defects such as sand holes, stomata, misrun, deformation are asked
Topic, yield rate is not high, in addition, casting is also easy to produce more gaseous contamination, water pollution etc..2nd, for forging, processing at present
Method is：Using standard fish platee as rolling blank, displacement forging then is carried out to local, to realize adding for compromising joint bar
Work.The problem of this processing method is present：Common fish platee two ends are carried out with the processing of different process, one end is rolling, one end
For forging and stamping；This can cause the mechanical performance at product two ends, tissue disunity, there is potential safety hazard；And secondary forging, add
The process heated again, causes the waste of resource, the energy and manpower.
Therefore, from the point of view of existing variable cross-section track connecting plate manufacturing technology, it is badly in need of a kind of advanced manufacturing work
Skill, to improve the production efficiency of variable cross-section track connecting plate, reduces production cost, while also to cause product to have the comprehensive of stabilization
Close performance.This will bring good economic benefit in railway casting production.
The content of the invention
In order to solve the problem of present production process produces Chen Bengao, properties of product are unstable, the present invention provides a kind of become
The rolling mold and finishing mold and processing method of section track connecting plate, concrete technical scheme are as follows.
A kind of rolling of variable cross-section track connecting plate and finishing mold, including intermittent rolling mold and finish-forging die finish
Tool, the intermittent rolling mold includes upper die and lower die, and upper die and lower die are respectively cylinder, rotates simultaneously, in contact surface
The male and fomale(M＆F) of mutual cooperation is set respectively, sheet material is put between upper die and lower die and rolled, defined shape is formed；
First passage rolling mold die cavity cross sectional shape is irregular quadrilateral, and it is diagonal that upper die and lower die die joint is located at two
Position；Second passage rolling mold die cavity cross sectional shape is variable cross-section track connecting plate section, and upper die and lower die die joint, which is located at, to be become
Section track connecting plate section horizontal direction maximum displacement position.
The finish-forging die include upper mold portion and lower mold portion, wherein, the upper mold portion include cope plate, drift, hyposphene and
Fastening bolt, drift is anchored on mould centre；The lower mold portion include lower template, locating piece, upper wedge, finish-forging ejector beam and
Fastening bolt；Set raised in the middle of the upper mold portion and lower mold portion, upper mold portion and lower mold portion two ends set concave surface, and upper mold portion is with
Cavity is left in the middle of when mould portion closes up, the blank for being put into cavity between finish-forging finishing mold upper mold portion and lower mold portion is forged and pressed
Finishing, drift runs through upper mold portion and lower mold portion.
Wherein, the intermittent rolling mold and cope plate and lower template in finish-forging finishing mold use common Forming Die
Has steel, one kind in 5CrNiMo, 5CrMnMo or 4Cr5MoSiV, upper die and lower die use obdurability mould steel, are selected from
One kind in H13,4Cr3Mo2V, 4Cr5W2VSi or ER8.
It is preferred that, the first passage rolling mold and the second passage rolling mold of the intermittent rolling mold are respectively along circle
Cylinder is sequentially arranged the die cavity of two same cross-sectionals, and two pieces variable cross-section track connecting plate can be made simultaneously in once rolling,
Comparing, " one goes out one " preparation efficiency, and this programme can realize that " one goes out two ", improves production efficiency.
It is furthermore preferred that the intermittent rolling mold the first passage rolling mold of horizontally-parallel setting and the on the cylinder
The die cavity of two two different cross sections of passes mould, an irregular quadrilateral connection can be made simultaneously in once rolling
Plate and a variable cross-section track connecting plate.
It is furthermore preferred that the intermittent rolling mold is sequentially arranged the first passes of two same cross-sectionals along cylinder
Mold cavity, then the two second passage rolling mold die cavities parallel with the first passage rolling mold chamber are set.Once rolling
In two pieces irregular quadrilateral connecting plate and two pieces variable cross-section track connecting plate can be made simultaneously.This programme can realize that " one goes out
Two ", further increase production efficiency.
Further, when two pieces variable cross-section track connecting plate is made in once rolling, two variable cross-section track connecting plates
Big end is connected；
Or, when two pieces variable cross-section track connecting plate is made in once rolling, two variable cross-section track connecting plate small end phases
Even；
Or, when two pieces variable cross-section track connecting plate is made in once rolling, the two big small ends of variable cross-section track connecting plate
It is connected.
It is preferred that, according to the specification of variable cross-section track connecting plate, quantity can be rolled every time for 1-2 parts.
It is preferred that, two finish-forging dies are sequentially connected in series, and once can carry out forging and stamping finishing to two pieces blank simultaneously.This
Scheme can realize that " one goes out two ", further increases production efficiency.
Present invention also offers a kind of new processing method of variable cross-section track connecting plate, using intermittence rolling and finishing
Combined machining method, comprise the following steps：
1. taking round steel, the bar of suitable length is sawn into sawing machine；
Heated 2. bar in step 1 is put into heating furnace, 950-1200 DEG C of heating-up temperature, heat time 2-
5min；
3. the first passage rolling mold is uniformly first preheated into 220-320 DEG C, by step 2 be heated to 950-1200 DEG C it is malleable
The bar of temperature is put into roller diameter 500-1200mm roll mill and rolled for the first time, and irregular section rolled blank is made；
4. the second passage rolling mold is uniformly first preheated into 220-320 DEG C, irregular section made from step 3 is rolled
Base, which is put into roller diameter 500-1200mm roll mill, carries out secondary rolling, the rolling of variable cross-section track connecting plate is made prefabricated
Base；
5. by finish-forging die preheating temperature to 220-320 DEG C, the rolled blank in step 4 is put into 800-8000t forcing presses
Interior progress finish-forging finishing, including punching, centre position displacement finish-forging and the part of trimming three, punching are carried out simultaneously with finish-forging, then
Carry out trimming, the variable cross-section track connecting plate after being processed.
The present invention is not related to follow-up Technology for Heating Processing.
This processing method can avoid the defect of the manufacturing process of casting at present and second displacement forging；In step 3 and step
During rapid 4 roll forming, rolling deformation is continuous hydrostatic profile process, and metal fibrous tissue is evenly distributed, fibr tissue
It is not switched off, while not impacting and vibrating in this process, it is ensured that the stability of the mechanical property of product.In step 5 finish-forging
In finishing, the relative slip between prefabricated blank and mould is smaller, and residual deformation and additional stress are relatively small, it is ensured that different
The stability of shape fish tail board size；It is of great significance in railway casting production field tool.
Brief description of the drawings
The Figure of description for constituting the part of the present invention is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.
Fig. 1 is variable cross-section track connecting plate rolling mold structural section schematic diagram described in the embodiment of the present invention 1；
Fig. 2 is a kind of profile of intermittent rolling mold the first passage rolling mold of the embodiment of the present invention 1；
Fig. 3 is a kind of A-1 expanded views of intermittent rolling mold the first passage rolling mold of the embodiment of the present invention 1；
Fig. 4 is a kind of profile of intermittent rolling mold the second passage rolling mold of the embodiment of the present invention 1；
Fig. 5 is a kind of B-1 expanded views of intermittent rolling mold the second passage rolling mold of the embodiment of the present invention 1；
Fig. 6 is a kind of expanded view of intermittent rolling mold the first passage rolling mold of the embodiment of the present invention 2；
Fig. 7 is a kind of expanded view of intermittent rolling mold the second passage rolling mold of the embodiment of the present invention 2；
Fig. 8 is a kind of profile of the intermittent rolling mold of the embodiment of the present invention 3；
Fig. 9 is a kind of expanded view of the intermittent rolling mold of the embodiment of the present invention 3；
Figure 10 is a kind of expanded view of the intermittent rolling mold of the embodiment of the present invention 4；
Figure 11 is variable cross-section track connecting plate finish-forging finishing mold side view described in the embodiment of the present invention 1；
Figure 12 is variable cross-section track connecting plate finish-forging finishing mold top view described in the embodiment of the present invention 1；
Figure 13 is the finish-forging knockout pin arrangement of variable cross-section track connecting plate finish-forging finishing mold described in the embodiment of the present invention 1
Figure；
Figure 14 is variable cross-section track connecting plate finish-forging finishing mold punch structure figure described in the embodiment of the present invention 1；
Figure 15 is variable cross-section track connecting plate finish-forging finishing mold top view described in the embodiment of the present invention 5；
The forming process schematic diagram for the variable cross-section track connecting plate processing method that Figure 16 provides for the present invention；
Figure 17 is forging and stamping metal streamline type schematic diagram；
Figure 18 is the streamlined schematic diagram of intermittent rolled metal.
In figure, 1-1 is mould on intermittent rolling mold, and 1-2 is mould under intermittent rolling mold；2-1 is lower template, 2-2
For hyposphene, 2-3 is lower mould, and 2-4 is upper mould, and 2-5 is upper wedge, and 2-6 is fastening bolt, and 2-7 is cope plate, and 2-8 is finish-forging liftout
Bar, 2-9 is locating piece, and 2-10 is drift.
Embodiment
It is noted that described further below is all exemplary, it is intended to provide further instruction to the present invention.Unless another
Indicate, all technologies used herein and scientific terminology are with usual with general technical staff of the technical field of the invention
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Intermittent rolling described in embodiment includes rolling and finish to gauge in advance, when rolling process only has two steps, and distinguishing can be with
It is stated as the first passes and the second passes.
As background technology is introduced, there is the deficiency that low production efficiency, properties of product can not ensure in the prior art,
In order to solve technical problem as above, the present invention proposes the mould and processing method of a kind of variable cross-section track connecting plate.
Embodiment 1：
As shown in figure 1, the present invention provides rolling and the finishing mold of a kind of variable cross-section track connecting plate, including intermittence is rolled
Molding jig and finish-forging finishing mold, concrete technical scheme are as follows：
As shown in figure 1, intermittent rolling mold includes upper mould 1-1 and lower mould 1-2, upper die and lower die are respectively cylinder,
Simultaneously rotate, contact surface set respectively between the male and fomale(M＆F) of mutual cooperation, male and fomale(M＆F) have die cavity, by sheet material be put into upper mould and
Rolled between lower mould in die cavity, form defined shape；As shown in FIG. 1 to 3, the first passage rolling mold die cavity cross sectional shape
For irregular quadrilateral, upper and lower mould die joint is located at two diagonal positions；As shown in Figure 4 and Figure 5, the second passage rolling mold die cavity
Cross sectional shape is variable cross-section track connecting plate section, and upper and lower mould die joint is located at variable cross-section track connecting plate section horizontal direction most
Big displacement position.
As shown in Figure 11~Figure 14, finish-forging die includes upper mold portion 2-4 and lower mold portion 2-3, wherein, the upper mold portion 2-4
Including cope plate 2-7, drift 2-10, hyposphene 2-2 and fastening bolt 2-6, drift 2-10 is anchored on upper mold portion 2-4 centres；
The lower mold portion 2-3 includes lower template 2-1, locating piece 2-9, upper wedge 2-5, finish-forging ejector beam 2-8 and fastening bolt 2-6；It is described
Set raised in the middle of upper mold portion 2-4 and lower mold portion 2-3, upper mold portion 2-4 and lower mold portion 2-3 two ends set concave surface, upper mold portion 2-4 with
Cavity is left in the middle of when lower mold portion 2-3 male and fomale(M＆F)s close up, to being put into cavity between finish-forging finishing mold upper mold portion and lower mold portion
Blank carries out forging and stamping finishing, and drift 2-10 runs through upper mold portion 2-4 and lower mold portion 2-3.
Wherein, the intermittent rolling mold and cope plate and lower template in finish-forging finishing mold use 5CrNiMo materials
The common hot die steel of matter, upper die and lower die use obdurability mould steel, select H13.
Embodiment 2：
As shown in Figure 6 and Figure 7, in a preferred embodiment, the first passage rolling die of the intermittent rolling mold
Tool and the second passage rolling mold are sequentially arranged the die cavity of two same cross-sectionals along cylinder respectively, can be same in once rolling
When two pieces variable cross-section track connecting plate is made, comparing, " one goes out one " preparation efficiency, and this programme can realize that " one goes out two ", raising
Production efficiency.
Embodiment 3：
As shown in Figure 8 and Figure 9, in a preferred embodiment, the intermittent rolling mold is laterally put down on the cylinder
Row sets the die cavity of the first passage rolling mold and second two different cross sections of passage rolling mold, can be same in once rolling
When an irregular quadrilateral connecting plate and a variable cross-section track connecting plate is made.
Embodiment 4：
As shown in Figure 10, it is furthermore preferred that the intermittent rolling mold is sequentially arranged two same cross-sectionals along cylinder
First passage rolling mold die cavity, then the two second passage rolling mold types parallel with the first passage rolling mold chamber are set
Chamber.Two pieces irregular quadrilateral connecting plate and two pieces variable cross-section track connecting plate can be made simultaneously in once rolling.We
Case can realize that " one goes out two ", further increases production efficiency.
Further, when two pieces variable cross-section track connecting plate is made in once rolling, two variable cross-section track connecting plates
Big end is connected；The advantage of " big end is connected " is：Preceding narrow middle wide design, it is easy to which bar is in the operation of rolling, it is to avoid material extrusion is existing
As.
Or, when two pieces variable cross-section track connecting plate is made in once rolling, two variable cross-section track connecting plate small end phases
Even；
Or, when two pieces variable cross-section track connecting plate is made in once rolling, the two big small ends of variable cross-section track connecting plate
It is connected.
It is preferred that, according to the specification of variable cross-section track connecting plate, quantity can be rolled every time for 1-2 parts.
Embodiment 5：
As shown in figure 15, two finish-forging dies are sequentially connected in series, and can once carry out forging and stamping essence to two pieces blank simultaneously
Whole this programme can realize that " one goes out two ", further increases production efficiency.
The equipment used in embodiment 6~8 includes the model that Weifang company of Ke Hua electric furnaces Manufacturing Co., Ltd produces
KGPS-1250 medium-frequency induction furnace；ZGD-500, ZGD-800 and ZGD- of middle machine forging and stamping Jiangsu limited company production
1200 roll mills；The YSK-800 of Chongqing east of a river Co., Ltd production 800t forcing presses, JIER Machine-Tool Group Co., Ltd.'s life
The TE4-3500 of production 3500 tons of forcing presses and the J35-8000t forcing presses of Qingdao Hongda Forging Machinery Co., Ltd's production.
Embodiment 6：
In a kind of typical embodiment of the present invention, new the invention provides a kind of variable cross-section track connecting plate adds
Work method, using the combined machining method of intermittent rolling and finishing, as shown in figure 16, comprises the following steps：
1. taking 55#, the round steel of φ 70 is sawn into long 1000mm bar with sawing machine；
Heated 2. bar in step 1 is put into heating furnace, 950 DEG C of heating-up temperature, heat time 5min；
3. the first passage rolling mold is uniformly first preheated into 320 DEG C, step 2 is heated to the rod of 1200 DEG C of malleable temperature
Material is put into roller diameter 500mm ZGD-500 roll mills to be rolled for the first time, and irregular section rolled blank is made；
4. the second passage rolling mold is uniformly first preheated to 320 DEG C, by irregular section rolled blank made from step 3
It is put into roller diameter 500mm roll mill and carries out secondary rolling, variable cross-section track connecting plate rolling prefabricated blank is made；
5. the rolled blank in step 4 is put into 800t YSK-800 forcing presses by finish-forging die preheating temperature to 320 DEG C
Finish-forging finishing, including punching, centre position displacement finish-forging and the part of trimming three are carried out, punching is carried out simultaneously with finish-forging, and laggard
Row trimming, the variable cross-section track connecting plate after being processed.
The present invention is not related to follow-up Technology for Heating Processing.
Embodiment 7：
In another embodiment of the invention, the step 2 is added for bar in step 1 is put into heating furnace
Heat, 1200 DEG C of heating-up temperature, heat time 2min；Step 3, will for the first passage rolling mold is uniformly first preheated into 220 DEG C
Step 2 is heated to the bar of 950 DEG C of malleable temperature and is put into roller diameter 1200mm ZGD-1200 roll mills to be rolled for the first time
System, is made irregular section rolled blank；Second passage rolling mold is first uniformly preheated to 220 DEG C by step 4., and step 3 is made
The irregular section rolled blank obtained, which is put into roller diameter 1200mm roll mill, carries out secondary rolling, and variable cross-section track is made and connects
Fishplate bar rolls prefabricated blank；Rolled blank in step 4 is put into 8000t YSK- by step 5. finish-forging die preheating temperature to 220 DEG C
Finish-forging finishing, including punching, centre position displacement finish-forging and the part of trimming three are carried out in 8000 forcing presses, punching and finish-forging are simultaneously
Carry out, then carry out trimming, the variable cross-section track connecting plate after being processed.
Embodiment 8：
In another embodiment of the invention, the step 2 is added for bar in step 1 is put into heating furnace
Heat, 1000 DEG C of heating-up temperature, heat time 3min；Step 3, will for the first passage rolling mold is uniformly first preheated into 320 DEG C
Step 2 is heated to the bar of 1000 DEG C of malleable temperature and is put into roller diameter 800mm ZGD-800 roll mills to be rolled for the first time
System, is made irregular section rolled blank；Second passage rolling mold is first uniformly preheated to 320 DEG C by step 4., and step 3 is made
The irregular section rolled blank obtained, which is put into roller diameter 800mm roll mill, carries out secondary rolling, and variable cross-section track is made and connects
Fishplate bar rolls prefabricated blank；Rolled blank in step 4 is put into 3500t TE4- by step 5. finish-forging die preheating temperature to 320 DEG C
Finish-forging finishing, including punching, centre position displacement finish-forging and the part of trimming three are carried out in 3500 forcing presses, punching and finish-forging are simultaneously
Carry out, then carry out trimming, the variable cross-section track connecting plate after being processed.
In another embodiment of the present invention, the cope plate in above-mentioned intermittent rolling mold and finish-forging finishing mold is with
Template uses the common hot die steel of 5CrMnMo materials, and upper die and lower die use obdurability mould steel, select 4Cr3Mo2V.
In another embodiment of the present invention, the cope plate in above-mentioned intermittent rolling mold and finish-forging finishing mold is with
Template uses the common hot die steel of 4Cr5MoSiV materials, and upper die and lower die use one kind in 4Cr5W2VSi or ER8 strong
Flexible mold steel.Above-mentioned material is not limited to, those skilled in the art can select suitable Steel material according to actual conditions.
This processing method can avoid the defect of the manufacturing process of casting at present and second displacement forging；In step 3 and step
During rapid 4 roll forming, rolling deformation is continuous hydrostatic profile process, and metal fibrous tissue is evenly distributed, fibr tissue
It is not switched off, while not impacting and vibrating in this process, therefore, there is good gold by this processing method processing products obtained therefrom
Category is streamlined (see metal streamlines of the Figure 17 for forging, Figure 18 is rolled metal streamline), it is ensured that the mechanical property of product
Stability.Due to having completed most of deformation in step 3 and step 4 operation of rolling, in step 5 finish-forging finishing, in advance
Relative slip between base and mould is smaller, and residual deformation and additional stress are relatively small, it is ensured that compromising joint bar size
Stability；It is of great significance in railway casting production field tool.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. rolling and the finishing mold of a kind of variable cross-section track connecting plate, including intermittent rolling mold and finish-forging finishing mold,
The intermittent rolling mold includes upper die and lower die, and upper die and lower die are respectively cylinder, rotates simultaneously, in contact surface difference
The male and fomale(M＆F) cooperated is set, sheet material is put between upper die and lower die and rolled, defined shape is formed；Characterized in that,
First passage rolling mold die cavity cross sectional shape is irregular quadrilateral, and upper die and lower die die joint is located at two diagonal positions；Second
Passes mold cavity cross sectional shape is variable cross-section track connecting plate section, and upper die and lower die die joint is located at variable cross-section track
Connecting plate section horizontal direction maximum displacement position；
The finish-forging die includes upper mold portion and lower mold portion, wherein, the upper mold portion includes cope plate, drift, hyposphene and fastening
Bolt, drift is anchored on mould centre；The lower mold portion includes lower template, locating piece, upper wedge, finish-forging ejector beam and fastening
Bolt；Set raised in the middle of the upper mold portion and lower mold portion, upper mold portion and lower mold portion two ends set concave surface, upper mold portion and lower mold portion
Cavity is left in the middle of when closing up, forging and stamping essence is carried out to the blank for being put into cavity between finish-forging finishing mold upper mold portion and lower mold portion
Whole, drift runs through upper mold portion and lower mold portion.
2. rolling and the finishing mold of a kind of variable cross-section track connecting plate according to claim 1, it is characterised in that described
Cope plate and lower template in intermittent rolling mold and finish-forging finishing mold use selected from 5CrNiMo, 5CrMnMo or
A kind of common hot die steel in 4Cr5MoSiV；The upper die and lower die use obdurability mould steel, selected from H13,
One kind in 4Cr3Mo2V, 4Cr5W2VSi or ER8.
3. rolling and the finishing mold of a kind of variable cross-section track connecting plate according to claim 1, it is characterised in that described
The the first passage rolling mold and the second passage rolling mold of intermittent rolling mold are sequentially arranged two phases along cylinder respectively
With the die cavity in section, two pieces variable cross-section track connecting plate can be made simultaneously in once rolling.
4. rolling and the finishing mold of a kind of variable cross-section track connecting plate according to claim 1, it is characterised in that described
Intermittent rolling mold is horizontally-parallel on the cylinder to set the first passage rolling mold and the second passage rolling mold two not
With the die cavity in section, an irregular quadrilateral connecting plate can be made simultaneously in once rolling and a variable cross-section track connects
Fishplate bar.
5. rolling and the finishing mold of a kind of variable cross-section track connecting plate according to claim 1, it is characterised in that described
Intermittent rolling mold is sequentially arranged the first passage rolling mold die cavity of two same cross-sectionals along cylinder, then sets and first
Two parallel the second passage rolling mold die cavities of passes mold cavity.Two pieces can be made simultaneously in once rolling not advise
Then quadrangle connecting plate and two pieces variable cross-section track connecting plate.
6. rolling and the finishing mold of a kind of variable cross-section track connecting plate according to claim 5, it is characterised in that one
When two pieces variable cross-section track connecting plate is made in secondary rolling, the two big ends of variable cross-section track connecting plate are connected.
7. rolling and the finishing mold of a kind of variable cross-section track connecting plate according to claim 5, it is characterised in that one
When two pieces variable cross-section track connecting plate is made in secondary rolling, two variable cross-section track connecting plate small ends are connected.
8. rolling and the finishing mold of a kind of variable cross-section track connecting plate according to claim 5, it is characterised in that one
When two pieces variable cross-section track connecting plate is made in secondary rolling, the two big small ends of variable cross-section track connecting plate are connected.
9. rolling and the finishing mold of a kind of variable cross-section track connecting plate according to claim 5, it is characterised in that two
The finish-forging die is sequentially connected in series, and once can carry out forging and stamping finishing to two pieces blank simultaneously.
10. a kind of new processing method of variable cross-section track connecting plate, comprises the following steps：
Step 1. takes round steel, and the bar of suitable length is sawn into sawing machine；
Bar in step 1 is put into heating furnace and heated by step 2., 950-1200 DEG C of heating-up temperature, heat time 2-
5min；
First passage rolling mold is first uniformly preheated to 220-320 DEG C by step 3., by step 2 be heated to 950-1200 DEG C it is malleable
The bar of temperature is put into roller diameter 500-1200mm roll mill and rolled for the first time, and irregular section rolled blank is made；
Second passage rolling mold is first uniformly preheated to 220-320 DEG C by step 4., and irregular section made from step 3 is rolled
Base, which is put into roller diameter 500-1200mm roll mill, carries out secondary rolling, the rolling of variable cross-section track connecting plate is made prefabricated
Base；
Rolled blank in step 4 is put into 800-8000t forcing presses by step 5. finish-forging die preheating temperature to 220-320 DEG C
Finish-forging finishing, including punching, centre position displacement finish-forging and the part of trimming three are carried out, punching is carried out simultaneously with finish-forging, and laggard
Row trimming, the variable cross-section track connecting plate after being processed.
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Cited By (3)
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| CN111570691A (en) * | 2020-05-13 | 2020-08-25 | 安徽中志轨道交通装备制造有限公司 | Forging mechanism for continuously forging and pressing switch rail and preparation process of forged and pressed switch rail |
| CN112170480A (en) * | 2020-09-10 | 2021-01-05 | 宝钢特钢韶关有限公司 | Method for improving rolling of H13 steel grade and H13 round steel |
| RU218860U1 (en) * | 2023-03-07 | 2023-06-15 | Открытое Акционерное Общество "Российские Железные Дороги" | Device for the manufacture of butt transitional rail pads |
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| RU218860U1 (en) * | 2023-03-07 | 2023-06-15 | Открытое Акционерное Общество "Российские Железные Дороги" | Device for the manufacture of butt transitional rail pads |
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| CN107225150B (en) | 2019-12-03 |
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