WO2023040522A1

WO2023040522A1 - Profiled rail forging die automatic control system and method

Info

Publication number: WO2023040522A1
Application number: PCT/CN2022/111369
Authority: WO
Inventors: 赵小军; 刘江; 吴钟敏; 朱鹏杰; 王再兴
Original assignee: 中铁宝桥（南京）有限公司; 中铁宝桥集团有限公司
Priority date: 2021-09-18
Filing date: 2022-08-10
Publication date: 2023-03-23
Also published as: CN113664139A

Abstract

A profiled rail forging die automatic control system and method. The system comprises: a press control system, the press control system having a press (2); a composite extrusion die automatic control system, the composite extrusion die automatic control system comprising a composite extrusion die (1), a working pace of the composite extrusion die automatic control system being interlocked with a working pace signal of the press control system; the press (2) establishes a combined die step formula according to a height of the composite extrusion die (1), a workstation operation sequence number of the composite extrusion die (1), and pressure values of different working steps of the composite extrusion die (1).

Description

Automatic Control System and Method for Special-shaped Rail Forging Die

Cross References to Related Applications

This application claims the priority of the Chinese patent application with application number 202111100774.8 and titled "Automatic Control System and Method for Special-shaped Rail Forging Die" filed on September 18, 2021. The entire content of the above application is incorporated herein by reference.

technical field

The invention belongs to the technical field of metal pressing rail forging, and in particular relates to an automatic control system and method for a special-shaped rail forging die.

Background technique

Special-shaped rail forging refers to the forging process of forging a certain length of rail end section into another type of rail section blank, also known as rail heel forging. Since the appearance of the heel end type of railway turnout rails, due to different backgrounds such as equipment, materials, and demands at home and abroad, two major types of forging dies have been developed.

From 1980 to 2000, there were mainly composite extrusion dies in China. Restricted by the technical conditions of domestic press equipment, composite extrusion mold materials and processing capacity are insufficient, and domestic human resource bonuses and other factors, composite extrusion molds are formed step by step and segmented, requiring a team of 5-8 people to work together. The demand is only 2,000 tons; and the mold is small in size and low in cost, which meets the development needs of railway construction in China for a long period of time.

However, foreign countries rely on a strong industrial foundation, mature industrial automation technology, and high-welfare and high-cost environment for personnel. The mold tooling is designed in the form of an integral multi-station cavity. The tonnage of the press generally reaches more than 5,000 tons, and personnel operations are basically excluded The way of configuring the feeding system realizes the automatic assembly line production operation from feeding, retrieving, heating, press operation and mold operation.

Since 2000, with the speeding up of the national railway, the construction of high-speed railway has been put on the agenda, and the investment in national railway construction has been greatly increased. The turnout industry has gradually improved the automation of rail forging, and introduced a complete set of mold process equipment and equipment technology. The way of localization The degree of automation of rail forging in the industry has been greatly improved. However, due to the fact that its technical development background and foreign turnout market and demand are completely different from those in China, the localization and promotion of this model has encountered a lot of difficulties. There are two main points: (1) The cost of molds remains high: a single set of multi-station imported molds is about 6 million yuan, while the cost of a single set of domestically produced molds is as high as more than 1 million; 1 set. At present, the total number of domestic and export turnout rails has reached nearly 20. The cost of molds has been a stumbling block in front of various enterprises for many years. However, under the same die life, the cost of a single set of domestic composite extrusion dies is only 200,000-300,000, and there is a huge difference between the two. It also highlights that only products with few types and large batches can fully reflect the economy of multi-station molds, while the composite extrusion process of composite extrusion dies is not limited by this at all. Therefore, if domestic composite extrusion can be used If the mold realizes automatic production, the composite extrusion process based on the composite extrusion mold will be more economical in products with many types and small batches. (2) Mold design and debugging are difficult: Although the foreign multi-station imported mold forming process does not change the product structure and standards of special-shaped rails, its overall forming method is different from the composite extrusion of composite extrusion molds for many years. Compared with the forming method, the multi-station imported mold forming process has many difficulties in the design of the multi-station process due to the research and development experience, field experience, plastic forming principle and mold working conditions; The system accuracy and the state of the rail parts are harsh forming conditions, the fault tolerance and on-site adjustment measures are severely limited, or even impossible to start, and the new production line is often out of production for half a year; not only that, but in daily use, the mold replacement of the multi-station imported mold forming process is time-consuming and laborious. The composite extrusion process based on the composite extrusion die, after 40 years of cumulative use, the continuous optimization of the entire industry for several generations, has fully mastered its process, and it is flexible, changeable, easy to disassemble and combine, extremely It greatly facilitates the daily use on site, and effectively shortens the development cycle of new products and new processes, and the technical advantages are still very significant.

Based on the above two points, it can be seen that the practicability of this automatic rail production model imported from abroad with a complete set of technology and process equipment has formed a great contradiction with the fierce competition in the domestic turnout market and the form of product delivery time pressure and pressure, and its popularization has been seriously affected. hinder.

From the perspective of economy, technology and practicability, the composite extrusion process based on the composite extrusion die has great practical application value, and also satisfies products with short lead times, small batches and many varieties, mainly for export turnout business feature. Moreover, reducing the cost of rail forging is the primary cost control method under the premise of maintaining stable quality for a long time, and has played an important role in achieving sustainable profitability for the company for many years.

However, under the existing technology, based on the multi-person cooperative manual mode of compound extrusion die, different operators and different operation methods have a great influence on the forming of the workpiece, and the quality fluctuates greatly. In order to stabilize product quality, on the one hand, improve production efficiency, on the one hand, further improve the level of domestic and end automation technology, combining Chinese and Western; the press equipment and feeding system basically follow the principle of multi-station application, and in order to further retain the mold design and The core of the forging process, therefore, to automatically upgrade and transform the existing multi-person collaborative manual mode of the compound extrusion die operation, the improved technical solution of this application is now proposed.

It should be noted that this section is intended to provide background or context for the technical solutions of the present disclosure stated in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section.

Contents of the invention

The technical problem solved by the present invention is to provide an automatic control system and method for a special-shaped rail forging die, which uses a compound extrusion die to realize automatic production, and solves the technical problem of poor consistency of production quality and low production efficiency in the manual mode of the multi-person cooperation of the compound extrusion die question.

The present invention first applies for the protection of an automatic control system for a special-shaped rail forging die, which includes:

a press control system having a press; and

Composite extrusion die automatic control system, the composite extrusion die automatic control system includes a composite extrusion die, the process step beat of the composite extrusion die automatic control system is interlocked with the process step beat signal of the press control system;

Wherein, the press machine establishes mold-closing step formulas according to the height position of the compound extrusion die, the sequence number of the compound extrusion die station, and the pressure values of different steps of the compound extrusion die.

In the above technical solution, further: a rail head die, the rail head die is located at the bottom of the composite extrusion die;

Rail waist pre-forging die and rail waist final forging die, rail waist pre-forging die and rail waist final forging die are paired dies, and the paired rail waist pre-forging die and rail waist final forging die are located above the rail head die Set on both sides, and at the same time, the paired rail waist pre-forging dies and rail waist final forging dies are set at the same height as the front and rear stations; and

Rail bottom rolling mold and rail bottom shaping mold, the rail bottom rolling mold and rail bottom shaping mold are respectively located directly above the rail head mold for mold closing, and the rail bottom rolling mold and rail bottom shaping mold are at the same level Contours are set at the front and rear workstations respectively;

Wherein, the rail waist pre-forging die, the rail waist final forging die, the rail bottom rolling die and the rail bottom shaping die form a die changing system.

In the above technical solution, further: the composite extrusion die includes:

A mold platform, one end of the mold platform is the front extension of the platform, and the other end is the rear extension of the platform; between the front extension of the platform and the rear extension of the platform is the billet making station or shaping worker of the composite extrusion mold bits; and

A die changing frame, one side of the die changing frame is installed with a rail waist pre-forging die, and the other side of the die changing frame is installed with a rail waist final forging die.

In the above technical solution, further: the composite extrusion die includes an upper mold base, the front end of the upper mold base is suspended to install a rail bottom shaping mold, and the rear end of the upper mold base is suspended to install a rail bottom pressing mold; The bottom shaping mold is driven by a two-way cylinder to realize the axial suspension slide rail mold change operation of the rail bottom shaping mold relative to the upper mold base. The rail bottom pressing mold is driven by a servo cylinder to realize the rail bottom pressing mold hanging slide rail changing model work.

In the above technical solution, further: the rail bottom pressing die adopts a threaded connection push rod, and the push rod is used for manually operating the axial sliding displacement of the rail bottom pressing die relative to the upper mold base; There are scales; the bottom of the upper mold frame is made with a T-shaped chute; the rail bottom shaping mold and the rail bottom pressing die are slidably adapted to the T-shaped chute; the shaft end of the push rod has an axial freedom of movement; One side of the upper mold base is provided with an axial guide sleeve; the middle part of the push rod is fitted with the axial guide sleeve through sliding friction.

In the above technical solution, further: the rail waist pre-forging die and the rail waist final forging die are respectively provided with two general action points of No. 1 and No. 2;

The rail bottom shaping mold is set with two general action points of No. 3 and No. 4; the rail bottom rolling mold is set with six special working points of No. 5, No. 6, No. 7, No. 8, No. 9 and No. 10 And four reserved action points on the 11th, 12th, 13th, and 14th;

The upward position of the press is set to No. 15, which is a single-stroke universal action point, and the downward position of the press is set to No. 16, which is a single-stroke general action point;

The press is also provided with No. 17, a universal action point for single-stroke pressurization.

In the above technical solution, further: the rail waist pre-forging die and the rail waist final forging die adjust the actual position of the die by adjusting the die mounting screw.

In the above technical solution, further: the servo cylinder has a cylinder mounting guide shield.

In the above technical solution, further: the outer end of the push rod is provided with a push handle; the inner end of the push rod is provided with a mold connection part; the inner side of the push rod is connected to the composite extrusion die through the die connection part.

Second, the present invention applies for protection of an automatic control method for a special-shaped rail forging die, using the automatic control system for a special-shaped rail forging die described in any one of the above embodiments to automatically control the special-shaped rail forging die.

Compared with the prior art, the system of the present invention has the following advantages:

The loose-block compound extrusion die of the present invention is low in cost, mature in technology, and has high flexible matching characteristics, economical and practical in procurement and daily production, and easy to realize;

The invention is reasonable in structure, simple and practical, strong in versatility, convenient in installation and maintenance, convenient in design and construction, suitable for the production of steel track switches, and can be widely used in the field of forging the heel of rail parts; it has a wide range of applications in the track switch industry and related press multi-platform fields The promotion and application potential is a form of equipment development that the industry has been longing for for many years; it has a positive leading demonstration effect, and is of great significance to improving the level of equipment application in the industry and promoting the progress of turnout processing technology.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. Apparently, the drawings in the following description are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without creative efforts.

Fig. 1 is the perspective view of the use state of composite extrusion die and press of the present invention;

Fig. 2 is the perspective view of composite extrusion die of the present invention;

Fig. 3 is a schematic diagram of the longitudinal section structure of the composite extrusion die of the present invention in a mold clamping state;

Fig. 4 is the use status diagram of the billet making station of the composite extrusion die of the present invention;

Fig. 5 is a diagram of the use state of the shaping station of the composite extrusion die of the present invention;

Fig. 6 is a schematic diagram of the installation structure of the rail waist pre-forging die and the rail waist final forging die on the mold changing frame in Fig. 4 and Fig. 5;

Fig. 7 is the front view of one side installation of the rail waist mould;

Fig. 8 is the front view of the installation on the other side of the rail waist mold;

Fig. 9 is a length sectional view of the adjustable mounting screw of the rail waist mold in Fig. 7 and Fig. 8;

Fig. 10 is another length sectional view of the adjustable mounting screw of the rail waist mold in Fig. 7 and Fig. 8;

Fig. 11 is the schematic diagram of the longitudinal section of the rail bottom mold adopting threaded connection push rod;

Fig. 12 is a schematic diagram of an application embodiment of the five-station rolling stop position of the rolling mold at the bottom of the rail;

Fig. 13 is a press stroke curve, a pressure curve and a compound extrusion die station curve of the present invention;

Fig. 14 is a partial perspective view of the push rod connected composite extrusion die of the present invention;

Fig. 15 is the three-dimensional view of the pressing mold at the bottom of the push rod connecting rail of the present invention;

Fig. 16 is a perspective view of the bottom of the composite extrusion die of the present invention;

Fig. 17 is a three-dimensional view of the cylinder installation guide shield of the servo cylinder of the present invention.

In the figure: 1-compound extrusion die, 2-press; 11-rail head die, 12-rail waist pre-forging die, 13-rail waist final forging die, 14-rail bottom rolling die, 15-rail bottom shaping Mold; 101-mould platform, 102-platform front extension section, 103-platform rear extension section, 104-blank-making station, 105-shaping station, 106-mold changing frame, 3-upper mold frame, 4-two-way cylinder , 5-servo cylinder, 6-thread, 7-push rod, 301-T-type chute, 701-axial freedom degree of living port, 8-axial guide sleeve, 9-screw, 501-cylinder installation guide protection Cover, 702-push handle; 703-mold connecting part; 901-three-hole connecting rod, 902-retaining ring, 601-rail bottom mold connecting plate, 602-rail bottom mold mounting screw.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities.

As shown in Figure 1, the special-shaped rail forging die automatic control method has a special-shaped rail forging die automatic control system; the special-shaped rail forging die automatic control system includes a compound extrusion die automatic control system; the compound extrusion die automatic control system works The step beat is interlocked with the step beat signal of the press control system.

It should be noted that the signal in the signal interlock refers to the position of each module monomer in the composite extrusion die 1 and the pressure actuator of the press, the operation and position signal of the mechanical structure action; the signal interlock is to make each module single Information connection between the body and the press mechanism, so as to cooperate to complete the process action. The meaning of interlocking is logically set to avoid misoperation, misoperation causing equipment operation interference, and avoiding hidden dangers of human or accidental safety operation. The action cannot be operated synchronously by multiple machines, so as to achieve the definite execution of control logic commands, thereby effectively avoiding misoperation.

In conjunction with Fig. 2, it also includes a special-shaped rail forging die automatic control system used in the special-shaped rail forging die automatic control method, the special-shaped rail forging die automatic control system includes a composite extrusion die automatic control system; the composite extrusion die The automatic control system has a compound extrusion die 1, and the compound extrusion die automatic control system also has a compound extrusion die controller; the press control system has a press 2, and the press control system also has a press controller.

The controllers referred to here are programmable logic controllers PLC. The compound extrusion die automatic control system is connected with the press control system as a whole. Specifically: a signal transmitter (a device that sends out electrical signals) can be installed at each node position of the composite extrusion die 1 and the press machine 2. The signal transmitter can be a servo motor, a cylinder, a proximity switch, a photoelectric switch, and a servo system. The transmitter of the position signal reporting point is set, and each transmitter of the reporting point is related to the machinery and electricity of the whole system. Synchronization, coordination and continuous forging operations carried out by operation assistance.

The press 2 establishes the mold-closing step formula according to the height position of the compound extrusion die 1, the job number of the compound extrusion die 1 station, and the pressure values of the different steps of the compound extrusion die 1; multiple mold-closing step formulas are integrated and composed automatically Composite extrusion process; Composite extrusion die automatic control system and press control system complete the multi-step die-closing operation forging production of special-shaped rails according to the automatic composite extrusion process.

Specifically, see Table 1: Formulation Form of Clamping Steps

It should be noted that in Table 1: such as mold clamping 1-1, refers to the name of a mold combination form, which consists of multiple molds and mold clamping. Other clamping serial numbers can be deduced by analogy. The functions and parameters of different mold clamping are different. Since the rail needs to be heated for two heat times, in order to facilitate management, some of the same mold combinations are defined according to different fire times to avoid confusion.

In Table 1: the corresponding combination of molds from station 1-1 to station 2-7 has been given in Table 4: rail waist mold mold change and station formula table described later, which is a meaning. The serial number of the station is a numbering method for the logical arrangement of process actions. 1-X represents the station action of the first heating of the rail, and X represents the number of stations after the first heating; 2-Y has the same principle. The station shown in this article is a forging step of the mold, and can also be qualitatively understood as a forging station point. The difference between different station points lies in the combination of the mold, the role of the mold, and the combination of the press. The modulo parameters are different.

Table 2: The setting scheme of the blank-making point parameters of the rail bottom rolling die: combined with Figure 12.

See Table 2 in conjunction with Figure 2 and Figure 12 of the description. The rail bottom rolling die 14 and the rail bottom shaping die 15 both share a T-shaped chute 301 described later, and the directions of the two entering the T-shaped chute 301 are different. Direction installation, enter the work position from back to front; rail bottom shaping mold 15 is installed in front of the press 2, enter the work position from front to back.

The 14-point parameters of the rail bottom rolling mold in Table 2 should be understood as (combined with Figure 12): the rail bottom rolling plate moves to the 230 position for the first time, moves to the 341 position for the second time, and moves to the 341 position for the third time. Press to move to the 452 position, and so on. The horizontal movement of the rolling mold 14 at the bottom of the rail can also be realized by pushing and pulling the manual push rod 7 . Rail bottom shaping mold 15 is because its weight is big, therefore need not adopt artificial push-pull form.

Table 3: Parameters of blank-making point of rail bottom rolling die and action formula plan table:

What needs to be explained in Table 3 is: whether the action sequence is 12345 or 54321 is a specific process step, and its action sequence is related to the principle of metal plastic forming in process development. No matter which action sequence is actually a billet-making process Step, its rationality is for the purpose of billet making.

Table 4: Rail waist mold change and station formula:

In Table 4, the effect of the recovery station lies in the zero position of the mold, that is, the end of the first fire operation. In order to avoid omissions and facilitate the simplification of the procedure, the mold is reset to zero.

The invention can realize the automatic continuous production of the technical level of the loose block compound extrusion die, and make a major breakthrough in the long-term multi-person collaborative application mode; on the basis of satisfying the technical experience accumulation of the loose block compound extrusion die, it can apply more High level, higher efficiency, higher reliability production.

As shown in Figure 2 and Figure 3, in the above embodiment, further: the composite extrusion die 1 is composed of a rail head die 11, a rail waist pre-forging die 12, a rail waist final forging die 13, a rail bottom rolling die 14, a rail Bottom shaping mold 15 forms.

Wherein, the rail head mold 11 is positioned at the bottom of the mold platform 101 that the composite extrusion die 1 has; The rail waist final forging dies 13 are located on both sides above the rail head die 11, and the paired rail waist pre-forging dies 12 and rail waist final forging dies 13 are set at the same height as the front and rear stations of the die platform 101; The rolling die 14 at the bottom of the rail and the shaping die 15 at the bottom of the rail are positioned at the top of the rail head mold 11 for mold clamping respectively; Suspended horizontal installation; rail bottom rolling mold 14, rail bottom shaping mold 15 same level and contour are respectively located at the front and rear two stations of mold changing frame 3.

Among them, rail waist pre-forging die 12, rail waist final forging die 13, rail bottom rolling die 14, and rail bottom shaping die 15 form a die changing system, which is the main improvement point of the present invention. The mold change system is used to realize the position and type of molds required by different stations, as well as the speed and action of mold switching, and form the formula of mold clamping steps. The recipes of multiple mold clamping steps are integrated to complete the multi-step mold change operation of the composite extrusion process.

It should be noted that: the mold changing structure of the rail waist pre-forging die 12 and the rail waist final forging die 13 is an introductory type die changing device, see Chinese patent No. ZL201420260003.4.

The present invention is based on the composite extrusion production process of loose block type composite extrusion die, which can fundamentally stabilize product quality and improve production efficiency compared with manual operation; In terms of integration, it creates quantitative space, greatly improves the process control of the forging process, and also greatly improves the on-site labor environment and work intensity of personnel.

As shown in FIG. 4 , FIG. 5 , and FIG. 6 , in the above embodiment, further: the composite extrusion die 1 has a mold platform 101 , one end of the mold platform 101 is a platform front extension section 102 and the other end is a platform rear extension section 103 .

Between the platform front extension section 102 and the platform rear extension section 103 is the billet making station 104 or shaping station 105 of the composite extrusion die 1; wherein the composite extrusion die 1 has a mold changing frame 106; one side of the mold changing frame 106 is installed Rail waist pre-forging die 12, rail waist final forging die 13 is installed on the other side of die changing frame 106.

When in use: when the rail waist pre-forging die 12 of the die changing frame 106 moves to the billet making station 104 shown in FIG. 4 , the pre-forging operation is performed. When the rail waist final forging die 13 of the die changing frame 106 moves to the shaping station 105 shown in FIG. 5 , the final forging operation is performed. Regardless of pre-forging or final forging, the center of the working die of the compound extrusion die 1 always coincides with the center of the press 2.

Among them, when the compound extrusion die 1 moves to the billet making station 104, the billet making operation accounts for more than 90% of the total process steps of the automatic compound extrusion process; The shaping step operation on 105; when the composite extrusion die 1 moves to the billet making station 104 or the shaping station 105; it is used to perform the billet making action or shaping action respectively.

In the above-mentioned embodiment, further: the die-closing step recipe includes the die position parameter information, die type parameter information, die switching speed parameter information and die dynamics related to the composite extrusion die 1 at the billet making station 101 and the shaping station 102 Parameter information.

The invention can quantify the equipment speed, pressure and action, provide convenience for future equipment performance maintenance and daily use management, greatly optimize the use frequency and strength of the rated performance of the equipment, and reduce the wear and tear of equipment parts, reduce maintenance frequency, and reduce fatigue. Great application value.

As shown in Figure 2, in the above-mentioned embodiment, further: the composite extrusion die 1 includes an upper mold frame 3, the front end of the upper mold frame 3 is suspended from the bottom of the rail, and the rear end of the upper mold frame 3 is suspended from the bottom of the rail. The rail bottom shaping die 14 is driven by the two-way cylinder 4 to realize the axial suspension slide rail mold change operation of the rail bottom shaping die 15 relative to the upper mold frame 3; the same: the rail bottom shaping die 14 is driven by the servo cylinder 5 (as shown in Figure 14) drive to realize the axially long, short-stroke, high-precision, high-frequency, multi-step, multi-station hanging slide rail mold change operation of the rail bottom pressing mold 14 relative to the upper mold base 3 .

In the above embodiment, further: the servo cylinder 5 has a cylinder mounting guide shield 501 (as shown in FIG. 17 ), so as to effectively play a protective role.

As shown in Fig. 11, in the above-mentioned embodiment, further: the rail bottom pressing mold 14 is connected with the push rod 7 by thread 6 (combined with Fig. 15 and Fig. 16), and the screw connection is convenient for assembly and debugging. In FIG. 11 , rail bottom mold connecting plate 601 is fixedly installed with rail bottom mold such as rail bottom pressing mold 14 through rail bottom mold mounting screws 602 .

The push rod 7 is used to manually operate the axial sliding displacement of the rail bottom pressing mold 14 relative to the upper mold frame 3 . When the automatic mode cannot be executed, it can switch to the manual mode in time to continue forging.

Further: the push rod 7 is provided with a scale. The scale on the push rod 7 is used to grasp the position accuracy during manual operation, so as to ensure the consistency of product forging quality when operated by different personnel.

(as shown in Figure 15, the bottom of the upper formwork 3 is shaped on a T-shaped chute 301; the rail bottom shaping mold 15, the rail bottom pressing die 14 are slidably adapted to the T-shaped chute 301 to provide stable linear guidance. The T-shaped chute The groove 301 is used to prevent the relative dislocation of the rail bottom shaping die 15 , the rail bottom pressing die 14 and the upper mold frame 3 .

The axial end of the push rod 7 has an axial movable opening degree of freedom 701; the side of the upper mold frame 3 is provided with an axial guide sleeve 8; the middle part of the push rod 7 is compatible with the axial guide sleeve 8; the axial guide sleeve 8 And the degree of freedom 701 of the axial living port is used to prevent the threaded connection from being stuck caused by the reciprocating deformation of the push rod 7, and to provide a stable linear guide for the linear position of the push rod 7.

In the above embodiment, further: the outer end of the push rod 7 is provided with a push handle 702; the inner end of the push rod 7 is provided with a mold connection part 703; Compression die 14. The mold connecting part 703 is a vertical plate structure, which is fastened at multiple points through the vertical plate structure to reliably connect the molds. Thereby manual rolling operation is carried out.

As shown in Fig. 7, Fig. 8 and Fig. 9, in the above embodiment, further: the rail waist pre-forging die 12 and the rail waist final forging die 13 adjust the actual positions of the dies by adjusting the die mounting screw 9.

Specifically: the two ends of the rail waist pre-forging die 12 and the rail waist final forging die 13 are respectively provided with screw rods 9, and the length of the screw rod 9 can be replaced and adjusted. By changing the length of the screw rod 9, rail waist pre-forging dies 12 of different sizes can be realized. 1. Change and adjust the position of the rail waist final forging die 13. The outer end of the screw rod 9 is connected to the three-hole connecting rod 901, and is fixed with a retaining ring 902. The three-hole connecting rod 901 and the retaining ring 902 are used to realize the mold connection, which is reliable in fixing and avoids loosening.

Referring to Fig. 9 and Fig. 10, it should be noted that: the rail waist pre-forging die 12 and the rail waist final forging die 13 adjust the actual positions of the dies by adjusting the die mounting screw 9. The screw rod 9 follows the form of the existing annular retaining ring, and the length of the rod body of the screw rod 9 is divided into four grades of length. With M24*70 and M24*100 hexagonal screws and the existing M24*120 rail head mold inner hexagonal mounting screws, it can be combined to realize the mold The stepless adjustment of the distance between the shank and the mold is 60mm to 320mm, and the adjustment flexibility is far better than the original form.

The rail bottom rolling mold 14 adjusts the actual position of the mold by adjusting parameters; the single-stroke general action point of the press 2 is set according to different steps, different mold changes, different stations, different clamping numbers, and different pressures. Up, down, down pressure parameters.

In the above embodiment, further: the rail waist pre-forging die 12 and the rail waist final forging die 13 are respectively provided with two general action points No. 1 and No. 2. Rail bottom shaping mold 15 is set with two general action points No. 3 and No. 4; rail bottom rolling mold 14 is set with six special working points of No. 5, No. 6, No. 7, No. 8, No. 9 and No. No. 12, No. 13, and No. 14 are four reserved action points; the upward position of press 2 is set to No. 15, which is a single-stroke general action point; the downward position of press 2 is set to No. 16, which is a single-stroke general action point Bit; press machine 2 is also provided with a single-stroke pressurization universal action point on the 17th.

What needs to be explained is: Regarding the action point and work point, the main difference between the action point and work point of different molds lies in the combination form of work and the position of the mold during work. Its specific position is determined according to the actual forging process and the specific mold object. If necessary, different materials of heating furnace body and rail parts also need to be fine-tuned. For specific point information, please refer to Table 1: Formula table of mold clamping steps; and Table 3: Table of point parameters and action formula plan table for billet making of rail bottom rolling mold.

It can be seen that the rhythmicity of the main actions of the basic process of the mold closing formula, and the setting of the position clearly defines the connection mode and action sending node of each formula. The combination of action rhythm, position, connection mode and action signaling node has realized the action, parameter, position and coordination of many press mold clamping operations, mold station switching, and forging steps. The complete logic of the automatic control of the forging die realizes the synchronous, coordinated and continuous automatic production centered on the die control and assisted by the press operation.

Table 5: Signal point setting information table

It should be noted that: in Table 5, taking points No. 16 and No. 17 as examples: points No. 16 and No. 17 actually represent the lower limit position of the press from the initial height and the maximum limit pressure during the downward process. It can realize the dimensional control of the mold. The 1-1 in 16-1-1 in the table corresponds to the mold closing 1-1-. In principle, the upward, downward, and pressure of the press are different for different mold clamping, so as to optimize the configuration parameters of the process and adjust flexibly. H1 in the table represents the mold clamping height value. F2 represents the pressure value. 15-1-1 (H1-1) corresponds to the name of the 1-1 action of the upward mold change of the medium press at point 15.

The loose-block compound extrusion die of the present invention is low in cost, mature in technology, and has highly flexible mold matching characteristics, economical and practical in procurement and daily production, and easy to realize; it can break through the theory of "only four stations" in the automatic mold control process in the field of rail forging The passive form realizes two-station automatic continuous production; smoothly guarantees the automatic improvement of the enterprise's equipment and process level, reasonable control of production costs, stable and continuous mature process, and achieves multiple results with half the effort.

In summary, the present invention has a reasonable structure, is simple and practical, has strong versatility, is convenient for installation and maintenance, and is convenient for design and construction. The platform field has a wide potential for promotion and application, and it is the equipment development form that the industry has been longing for for many years; it has a positive leading demonstration effect, and is of great significance to improving the level of equipment application in the industry and promoting the progress of turnout processing technology.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific examples described in conjunction with the embodiment or example A feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, and these modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure . The specification and examples are to be considered exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

Industrial Applicability

The invention relates to an automatic control system and method for a special-shaped rail forging die. The system includes: a press control system, the press control system has a press; an automatic control system for a composite extrusion die, and the automatic control of the composite extrusion die The system includes a composite extrusion die, the working step beat of the automatic control system of the composite extrusion die is interlocked with the working step beat signal of the press control system; Establish mold clamping step recipes based on the job sequence number and the pressure values of different steps of the composite extrusion die. The advantages are: the cost of the loose-block compound extrusion die of the present invention is low, the technology is mature, and it has high flexible mold matching characteristics, and it is economical and practical for procurement and daily production, and easy to realize; the present invention is reasonable in structure, simple and practical, strong in versatility, and easy to install and maintain. It is convenient, easy to design and construct, suitable for the production of steel track turnouts, and can be widely used in the field of forging the heel of rail parts; it has a wide range of promotion and application potential in the turnout industry and related press multi-platform fields, and is the equipment development that the industry has been longing for for many years form; it has a positive leading and demonstration effect, which is of great significance to improving the application level of industry equipment and promoting the progress of turnout processing technology.

In addition, it can be understood that the automatic control system and method of the special-shaped rail forging die of the present application are reproducible and can be used in various industrial applications.

Claims

The special-shaped rail forging die automatic control system is characterized in that the system includes:

a press control system having a press (2); and

An automatic control system for a compound extrusion die, the automatic control system for the compound extrusion die includes a compound extrusion die (1), and the working step beat of the compound extrusion die automatic control system is connected with the working step beat signal of the press control system Lock;

Wherein, the press (2) establishes the mold closing step according to the height position of the compound extrusion die (1), the sequence number of the station operation of the compound extrusion die (1), and the pressure values of different steps of the compound extrusion die (1) formula.
According to the automatic control system of the special-shaped rail forging die according to claim 1, it is characterized in that, the composite extrusion die (1) comprises:

A rail head die (11), the rail head die (11) is located at the bottom of the composite extrusion die (1);

Rail waist pre-forging die (12) and rail waist final forging die (13), rail waist pre-forging die (12), rail waist final forging die (13) are all paired dies, and the paired rail waist pre-forging dies (12), rail waist final forging dies (13) are located on both sides above the rail head die (11), and the paired rail waist pre-forging dies (12) and rail waist final forging dies (13) are located at the front and rear Two station level contour settings; and

Rail bottom rolling die (14) and rail bottom shaping die (15), described rail bottom rolling die (14), rail bottom shaping die (15) are positioned at rail head mold (11) directly above respectively for clamping molds , the rolling die (14) at the bottom of the rail and the shaping die (15) at the bottom of the rail are respectively located at the front and rear two stations at the same level and contour;

Wherein, the rail waist pre-forging die (12), the rail waist final forging die (13), the rail bottom rolling die (14) and the rail bottom shaping die (15) form a die changing system.
According to the automatic control system of the special-shaped rail forging die according to claim 1, it is characterized in that, the composite extrusion die (1) comprises:

A mold platform (101), one end of the mold platform (101) is a platform front extension (102), and the other end is a platform rear extension (103); the platform front extension (102) and the platform rear extension Between (103) is the billet making station (104) or shaping station (105) of composite extrusion die (1); and

A mold changing frame (106), the rail waist pre-forging die (12) is installed on one side of the mold changing frame (106), and the rail waist final forging die (13) is installed on the other side of the mold changing frame (106).
According to the automatic control system of the special-shaped rail forging die according to claim 1, it is characterized in that the composite extrusion die (1) includes an upper mold frame (3), and the front end of the upper mold frame (3) is suspended to install rail bottom shaping Mold (15), the rear end of the upper mold base (3) is suspended to install the rail bottom pressing mold (14); the rail bottom shaping mold (15) is driven by the two-way cylinder (4) to realize that the rail bottom shaping mold (15) is relatively Axially suspended sliding rail mold change operation of the upper mold base (3), the rail bottom pressing mold (14) is driven by the servo cylinder (5) to realize the rail bottom pressing mold (14) hanging slide rail mold changing Operation.
According to the automatic control system of the special-shaped rail forging die according to claim 4, it is characterized in that the rail bottom pressing die (14) is connected with a push rod (7) by a thread (6), and the push rod (7) is used for manual The axial sliding displacement of the pressing mold (14) at the bottom of the operating rail relative to the upper die frame (3); the push rod (7) is provided with a scale; the bottom of the upper die frame (3) is shaped on a T-shaped chute ( 301); the rail bottom shaping mold (15), the rail bottom pressing mold (14) and the T-shaped chute (301) are slidably adapted; the shaft end of the push rod (7) has an axial movable opening degree of freedom (701 ); one side of the upper mold base (3) is provided with an axial guide sleeve (8); the middle part of the push rod (7) is adapted for sliding friction with the axial guide sleeve (8).
According to claim 2, the special-shaped rail forging die automatic control system is characterized in that the rail waist pre-forging die (12) and the rail waist final forging die (13) are respectively provided with two universal action points of No. 1 and No. 2 ;

The rail bottom shaping mold (15) is provided with two general action points of No. 3 and No. 4; the rail bottom rolling mold (14) is provided with No. 5, No. 6, No. 7, No. 8, No. 9 and No. 10 Six dedicated working points and four reserved action points No. 11, No. 12, No. 13 and No. 14;

The upward position of the press (2) is set at No. 15, which is a single-stroke general action point, and the downward position of the press (2) is set at No. 16, which is a single-stroke general action point;

The press (2) is also provided with a No. 17 universal action point for single-stroke pressurization.
The special-shaped rail forging die automatic control system according to claim 6 is characterized in that, the rail waist pre-forging die (12) and the rail waist final forging die (13) adjust the mold actuality by adjusting the die mounting screw (9). Location.
The automatic control system for the special-shaped rail forging die according to claim 4, characterized in that, the servo cylinder (5) has a cylinder installation guide protective cover (501).
According to the automatic control system of the special-shaped rail forging die according to claim 8, it is characterized in that, the outer end of the push rod (7) is provided with a push handle (702); the inner end of the push rod (7) is provided with a mold connecting part (703 ); the inner side of the push rod (7) is connected to the compound extrusion die (1) through the die connecting part (703).
The method for automatically controlling the special-shaped rail forging die is characterized in that the special-shaped rail forging die is automatically controlled by the special-shaped rail forging die automatic control system according to any one of claims 1-9.