Forging die and manufacturing method for contact network locator sleeve and locating hook ring

Abstract

A forging die and manufacturing method for a contact network locator sleeve and a positioning hook ring, belonging to the technical field of manufacturing parts for electrified railway contact networks, is intended to solve the problem that the existing electrified railway contact network locators have loose metallographic structures and there is still room for improvement and innovation in the manufacturing process method. The forging die for the contact network locator sleeve and the positioning hook ring used in the invention is a locator sleeve / positioning hook ring left die and a locator sleeve / positioning hook ring right die that are symmetrical on the left and right. The upper die cooperates with the lower base to be fixed with the locator sleeve / positioning hook ring left die and the locator sleeve / positioning hook ring right die, and an automatic push rod is dynamically connected at the bottom of the locator sleeve / positioning hook ring left die and the locator sleeve / positioning hook ring right die; the manufacturing method includes the first process of blanking the rod into sections to the eighth process. Its die structure is novel and practical, and the manufacturing method is feasible, which is suitable for various types of locators for electrified railway contact networks.

Description

Technical Field

[0001] The invention belongs to the technical field of manufacturing parts for electrified railway contact network and relates to a molding die and a manufacturing process method for a locator sleeve and a locating hook ring. Background Art

[0002] The positioner used in the contact network of electrified railways is a key component in the contact network system of electrified railways. The positioner is a hook ring riveted on one end and a positioner sleeve riveted on the other end. The positioner sleeve is connected to the positioning wire clamp to fix the contact wire position. Its function is to pull the contact wire out of the design standard through the positioning wire clamp, fix the contact wire in a certain position, ensure that the working surface of the contact wire is parallel to the rail surface and bear the horizontal force of the contact wire. In this way, the contact network is always within the working range of the pantograph slide, and the current is well taken to avoid bow detachment. The positioning sleeve and positioning hook of the common contact network positioning device in the field of electrified railway and rail transit are mainly processed and manufactured by casting copper alloy ZCuAl10Fe3Mn2 structure, including CAC702 casting molding process method in processing and use; due to the casting process, the internal structure of the casting is loose, which is easy to produce defects such as pores, shrinkage, cracks, etc., and forging and casting are two different metal processing processes. There are obvious differences in their definition, processing method, production efficiency, material properties, cost and appearance. Forging is to use pressure machinery to directly shape liquid metal in the mold to form the required parts; the advantages of forging include: first, precise control of molecular structure, forging can precisely control the molecular structure of metal, thereby improving the performance of metal; second, reducing waste: less waste in the forging process, so forged parts are usually lighter than cast ones; third, complex shape: forging can produce complex shapes, which is suitable for manufacturing high-performance electrified railway parts and other parts; fourth, high efficiency: forging uses die extrusion molding, high production efficiency, and easy to realize automation. Therefore, in the known technology, the locator sleeve and the locator hook ring of the existing electrified railway contact network locator adopt a casting process, and the product has many flaws in flaw detection and a low pass rate; there are external defects such as appearance deformation after casting, which affects the product quality and appearance, and the casting method is used for processing, which requires customized molds and supporting die-casting equipment, etc. Therefore, the yield rate is low, the equipment is expensive, and the manufacturing cost is high; for example, China Invention Patent Application Publication No. CN103358936A discloses a technical solution of "adjustable special-shaped locator for electrified railway contact network", which includes a fixed locator tube body and a locating wire clamp fixedly connected to the locating hook and the locating hook, which also adopt a casting process. It can be inferred that the adjustable special-shaped locator composed of the fixed locator tube body fixedly connected to the locating hook of the scheme is affected by the manufacturing process and the internal metallographic structure, and also has defects such as loose internal metallographic structure. In the continuous development and practical application of the electrified railway contact network, it is still necessary to further improve the manufacturing process of the locator sleeve and the locating hook ring products.

[0003] In view of this, in order to adapt to the development and technological progress of the electrified railway contact network, it is necessary to further improve and develop a new molding die for the locator sleeve and the locating hook and a manufacturing method thereof. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, solve the problem that the metallographic structure of the existing electrified railway contact network locator is loose, and the manufacturing process method still has room for improvement and innovation. The purpose of the present invention is to provide a forging die and manufacturing process method of a new contact network locator sleeve and a positioning hook ring, which makes the overall metallographic structure of the locator sleeve and the positioning hook ring dense after the product is manufactured and formed and then machined and opened, which not only improves the production and processing efficiency and the product qualification rate, but also has a novel and practical product structure and a reasonable and feasible manufacturing process method.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] A forging die for a contact network locator sleeve and a locator hook ring, comprising: an upper die, a locator sleeve and a locator hook ring left die, a locator sleeve and a locator hook ring right die, a fixed lower base, and an automatic push rod. The locator sleeve / locator hook ring left die and the locator sleeve / locator hook ring right die are symmetrically and dynamically connected in a concave hole of the fixed lower base. The upper die cooperates with the round rod material section clamped between the locator sleeve / locator hook ring left die and the locator sleeve / locator hook ring right die which are inserted and forged and embedded in the concave hole of the fixed lower base, and an automatic push rod is installed in the concave hole at the bottom of the fixed lower base to dynamically connect the locator sleeve / locator hook ring left die and the locator sleeve / locator hook ring right die.

[0007] The forging mold for the contact network positioner sleeve and the positioning hook ring, the corners of the inner cavity of each component of the forging mold for the contact network positioner sleeve and the positioning hook ring are arc chamfered.

[0008] The forging die of the above-mentioned contact network positioner sleeve and the positioning hook ring is based on the forging die of the above-mentioned contact network positioner sleeve and the positioning hook ring, and the forging manufacturing method of the positioner sleeve and the positioning hook ring is as follows:

[0009] 1) The first process is to forge the round bar material into round bar segments;

[0010] 2) The second process is to heat treat the round bar material segment according to the set initial forging temperature of the first primary forging and the second two-stage forming forging temperature;

[0011] 3) The third process is to carry out the first primary forging to form a product with a thick middle and thin ends.

[0012] 4) The fourth process is to perform a second two-stage forging on the first primary forging-formed shaped product. The second two-stage forging is a forming forging, which forges the arc-shaped concave and convex parts and the circular hole part into a formed product at one time;

[0013] 5) The fifth process is to forge the waste around the formed product after forging in the fourth process into a finalized product;

[0014] 6) The sixth process is to use a CNC drilling machine to perform precision machining and drilling to produce the locator sleeve and locating hook ring finalized products;

[0015] 7) The seventh process is to inspect the positioning sleeve and positioning hook ring formed products of the sixth process according to national product standards and enterprise product standards. Those that pass the inspection are then assembled into a complete set of positioning products and put into containers or warehouses.

[0016] The above-mentioned method for forging and forming the locator sleeve and the locating hook ring further includes an eighth step, namely:

[0017] 8) The eighth process is to carry out metallographic hardening treatment by dipping fire or surface anti-corrosion treatment by spraying anti-corrosion agent on the locator sleeve and locating hook ring finalized products manufactured in the seventh process according to actual needs and design requirements.

[0018] In the above-mentioned forging and manufacturing method of the locator sleeve and the locating hook ring, the setting temperature of the first primary forging in the third process is 900±50℃, and the setting temperature of the second forming forging in the fourth process is 700±50℃; or the setting temperature of the first primary forging is 900±10℃, and the setting temperature of the second two-stage forming forging in the fourth process is 700±10℃; and other practical forging setting temperatures.

[0019] The above-mentioned locator sleeve and locating hook ring are used forging forming dies and manufacturing methods. The process equipment and instruments used in the manufacturing method include: a programmable industrial computer, a bar blanking table, an automatic feeder, a material heater, a mechanical gripper, a forging press, a CNC drilling machine, a transmission track, a product assembly inspection table, and a qualified product container. The mechanical gripper includes a first mechanical gripper to a fifth mechanical gripper, a total of 5 mechanical grippers. The forging press includes a first forging press to a third forging press, a CNC drilling machine, a transmission track, a product assembly inspection table, and a qualified product container; the programmable industrial computer is respectively connected by electrical wires and controls the bar blanking table, the automatic feeder, the material heater, a mechanical gripper, a forging press, a CNC drilling machine, a transmission track, a product assembly inspection table, and a qualified product container. Material machine, material heater, first mechanical gripper - fifth mechanical gripper, first forging press - third forging press, CNC drilling machine, conveying track, the bar material dropping table is connected to the automatic feeder and then to the material heater, the rear part of the material heater is connected to the first forging press by the first mechanical gripper, the rear part of the first forging press is connected to the second forging press by the second mechanical gripper, the rear part of the second forging press is connected to the third forging press by the third mechanical gripper, the rear part of the third forging press is connected to the CNC drilling machine by the fourth mechanical gripper, the rear part of the CNC drilling machine is connected to the conveying track and the product assembly inspection table by the fifth mechanical gripper, and the rear part of the conveying track is connected to a qualified product container.

[0020] When the present invention is used, the forged structure contact network positioner product of the invention is assembled to various contact networks of the electrified railway according to the design requirements and actual needs. The specific manufacturing process method is: the positioner sleeve and the left mold of the positioning hook ring and the right mold of the positioner sleeve and the positioning hook ring are fixed in the fixed lower base to prevent the positioner sleeve and the left mold of the positioning hook ring and the right mold of the positioning sleeve and the positioning hook ring from being separated when the upper mold is stressed. After forging and forming, the automatic push rod pushes the positioner sleeve and the left mold of the positioning hook ring and the right mold of the positioning sleeve and the positioning hook ring upwards, and the positioner sleeve and the left mold of the positioning hook ring and the right mold of the positioning sleeve and the positioning hook ring are separated from the positioner sleeve and the positioning hook ring right mold, and the forged part is taken out. Specifically: according to the design requirements, the programmable industrial computer is controlled and set, and the material heater temperature and forging temperature are set. After the raw materials are dropped from the bar blanking table, they are connected to the automatic feeder and then to the material heater to heat the materials to 900±50℃. Then, they are transported to the first forging press by the first mechanical gripper for raw material stretching and initial forging to form a round-shaped initial product with a thick middle and thin ends. Then, they are transported to the second forging press by the second mechanical gripper for the second primary material stretching and flattening forging to form arc-shaped concave and convex parts and round hole parts. After forging and forming, they are transported to the third forging press by the third mechanical gripper for the second stage final forging to drop the waste materials around the formed product and forge it into a finalized product. Then, they are transported to the CNC drilling machine by the fourth mechanical gripper for hole rotation. Then, they are transported to the conveying track and product assembly inspection table by the fifth mechanical gripper for positioner product assembly. After the qualified products are inspected according to national standards and enterprise standards, they are transported to the qualified product container by the conveying track.

[0021] Since the design of the present invention adopts the above technical solution, it effectively solves the problem that the existing electrified railway contact network positioner has loose metallographic structure and the manufacturing process method still has room for improvement and innovation. The actual test results also show that it has a new and practical mold structure, a reasonable and feasible manufacturing method, and only machining and opening processing is performed after the product is manufactured and formed, so that the overall metallographic structure of the positioner sleeve and the positioning hook ring product is dense, which not only improves the processing efficiency and product qualification rate, but also improves the production speed, and enhances the stability and safety of the product. It is suitable for various types of positioners for electrified railway contact networks.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a specific structural schematic diagram of a complete set of positioner molds of the present invention.

[0025] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of an embodiment.

[0026] Figure 3 yes Figure 1 Flow chart of the process for manufacturing a contact network locator sleeve and a locating hook ring using a mold according to an embodiment.

[0027] Figure 4 yes Figure 1 An enlarged three-dimensional structural schematic diagram of the left mold of the positioner sleeve in the embodiment.

[0028] Figure 5 yes Figure 1 An enlarged three-dimensional structural schematic diagram of the left mold for positioning the hook ring in the embodiment.

[0029] Figure 6 yes Figure 1 A schematic diagram of a positioner product after a positioner sleeve and a positioner hook and loop product are manufactured by a mold of an embodiment and a positioner connecting tube is assembled thereon.

[0030] Figure 7 yes Figure 3 A process flow chart of the equipment and instruments used to manufacture the product in the process method embodiment.

[0031] The numbers in the accompanying drawings are: A-positioning hook; B-positioner sleeve; C-positioner connecting pipe; 1-upper mold; 2-positioner sleeve and positioning hook left mold; 201-positioner sleeve three-dimensional left mold; 202-positioning hook three-dimensional left mold; 3-positioner sleeve and positioning hook right mold; 4-fixed lower base; 5-automatic push rod; 6-programmable industrial computer; 7-bar blanking table; 8-automatic loader; 9-material heater; 10-14-first mechanical gripper ~ fifth mechanical gripper; 15-17-first forging press ~ third forging press; 18-CNC drilling machine; 19-transmission track; 20-product assembly inspection table; 21-qualified product container. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "top", "bottom", "front end", "rear end", "head", "tail", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0034] like Figure 1-Figure 2 , Figure 4-Figure 5 As shown, this embodiment includes: an upper mold 1, a locator sleeve and a locating hook ring left mold 2, a locator sleeve and a locating hook ring right mold 3, a fixed lower base 4, and an automatic push rod 5. The locator sleeve / locating hook ring left mold 2 and the locator sleeve / locating hook ring right mold 3 are symmetrically and dynamically connected in the concave hole of the fixed lower base 4. The upper mold 1 cooperates with the round rod material segment clamped between the locator sleeve / locating hook ring left mold 2 and the locator sleeve / locating hook ring right mold 3 which are inserted and forged and embedded in the concave hole of the fixed lower base 4, and an automatic push rod 5 is installed in the concave hole at the bottom of the fixed lower base 4 to dynamically connect the locator sleeve / locating hook ring left mold 2 and the locator sleeve / locating hook ring right mold 3.

[0035] For details, see the attached Figure 1-Figure 2 , Figure 4-Figure 5 In this embodiment, the inner corners of each component of the forging die for the contact network locator sleeve and the locating hook ring are chamfered with arcs.

[0036] Preferably, see the attached Figure 1 , Figure 3 , Figure 7 The positioning sleeve and positioning hook ring described in this embodiment are manufactured by forging as follows:

[0037] 1) The first process is to cut the bar into sections;

[0038] 2) The second process is to heat treat the above bar segments;

[0039] 3) The third process is to carry out the first primary forging to form a product with a thick middle and thin ends.

[0040] 4) The fourth process is to perform a second two-stage forging on the first primary forging-formed shaped product. The second two-stage forging is a forming forging, which forges the arc-shaped concave and convex parts and the circular hole part into a formed product at one time;

[0041] 5) The fifth process is to forge the waste around the formed product after forging in the fourth process into a finalized product;

[0042] 6) The sixth process is to use CNC drilling machine to perform precision machining and drilling to manufacture the locator sleeve and locating hook ring products.

[0043] 7) The seventh process is to inspect the positioning sleeve and positioning hook ring formed products of the sixth process according to national product standards and enterprise product standards. Those that pass the inspection are then assembled into a complete set of positioning products and put into containers or warehouses.

[0044] See attached Figure 5 The method for forging and forming the locator sleeve and the locating hook ring described in this embodiment further includes an eighth step, namely:

[0045] 8) The eighth process is to carry out metallographic hardening treatment by dipping fire or surface anti-corrosion treatment by spraying anti-corrosion agent on the locator sleeve and locating hook ring finalized products manufactured in the seventh process according to actual needs and design requirements.

[0046] See attached See attached Figure 1 , Figure 3 , Figure 7 In the forging and molding manufacturing method of the locator sleeve and the locating hook ring described in this embodiment, the setting temperature of the first primary forging in the third process is 900±15℃, and the setting temperature of the second molding forging in the fourth process is 700±10℃.

[0047] For example, see the attached Figure 7The process equipment and instruments used in the forging and forming manufacturing method of the locator sleeve and the locating hook ring described in this embodiment include: a programmable industrial computer 6, a bar blanking table 7, an automatic feeder 8, a material heater 9, a mechanical gripper, a forging press, a CNC drilling machine 18, a conveying track 19, a product assembly inspection table 20, and a qualified product container 21. The mechanical gripper includes a first mechanical gripper - a fifth mechanical gripper 10-14, a total of 5 mechanical grippers, the forging press includes a first forging press to a third forging press 15-17, a CNC drilling machine 18, a conveying track 19, a product assembly inspection table 20, and a qualified product container 21; the programmable industrial computer 6 is respectively connected by electrical wires and controls the bar blanking table 7, the automatic feeder 8, the material heater 9, the first mechanical gripper Grippers - to fifth mechanical grippers 10-14, first forging presses - third forging presses 15-17, CNC drilling machine 18, conveying track 19, the bar material blanking table 7 is connected to the automatic feeder 8 and then to the material heater 9, the rear of the material heater 9 is connected to the first forging press 15 by the first mechanical gripper 10, the rear of the first forging press 15 is connected to the second forging press 16 by the second mechanical gripper 11, the rear of the second forging press 16 is connected to the third forging press 17 by the third mechanical gripper 12, the rear of the third forging press 17 is connected to the CNC drilling machine 18 by the fourth mechanical gripper 13, the rear of the CNC drilling machine 18 is connected to the conveying track 19 and the product assembly inspection table 20 by the fifth mechanical gripper 14, and the rear of the conveying track 19 is connected to a qualified product container 21. The forging press described in this embodiment is an intelligent J58K series CNC electric screw forging press of Henan Anduan Intelligent Equipment Co., Ltd.

[0048] The above is only one embodiment. On this basis, other technical features and technical solutions derived by adding components, equivalent substitutions and local improvements without creative work by technicians in this field are all within the scope of protection of the patent of this invention.

Claims

1. A forging die for a contact network locator sleeve and a locating hook ring, characterized in that: It comprises an upper die (1), a locator sleeve and a locating hook ring left die (2), a locator sleeve and a locating hook ring right die (3), a fixed lower base (4), and an automatic push rod (5). The locator sleeve / locating hook ring left die (2) and the locator sleeve / locating hook ring right die (3) are symmetrically and dynamically connected in a concave hole of the fixed lower base (4). The upper die (1) is inserted and forged to fit the round bar material section clamped between the locator sleeve / locating hook ring left die (2) and the locator sleeve / locating hook ring right die (3) in the concave hole of the fixed lower base (4). An automatic push rod (5) is installed in the concave hole at the bottom of the fixed lower base (4) to dynamically connect the locator sleeve / locating hook ring left die (2) and the locator sleeve / locating hook ring right die (3).

2. The forging die for the contact network locator sleeve and the locating hook according to claim 1, characterized in that: The corners of the inner cavities of the forging mold parts of the contact network locator sleeve and the locating hook ring are circular chamfers.

3. The forging die for the contact network locator sleeve and the locating hook according to claim 1, characterized in that: Based on the forging die of the above-mentioned contact network locator sleeve and the locating hook ring, the forging manufacturing method of the locator sleeve and the locating hook ring is as follows: 1) The first process is to forge the bar material into round bar segments; 2) The second process is to heat treat the round bar segments; 3) The third process is to carry out the first primary forging, in which the round bar segment is forged into a round-shaped initial product with a thick middle and thin ends; 4) The fourth process is to perform a second two-stage forging on the first primary forging-formed shaped product. The second two-stage forging is a forming forging, which forges the arc-shaped concave and convex parts and the circular hole part into a formed product at one time; 5) The fifth process is to forge the waste around the formed product after forging in the fourth process into a finalized product; 6) The sixth process is to use a CNC drilling machine to perform precision machining and drilling to produce the locator sleeve and locating hook ring finalized products; 7) The seventh process is to inspect the positioning sleeve and positioning hook ring formed products of the sixth process according to national product standards and enterprise product standards. Those that pass the inspection are then assembled into a complete set of positioning products and put into containers or warehouses.

4. The method for forging and forming a locator sleeve and a locating hook ring according to claim 3, characterized in that: It also includes an eighth process, namely: 8) The eighth process is to carry out metallographic hardening treatment by dipping fire or surface anti-corrosion treatment by spraying anti-corrosion agent on the locator sleeve and locating hook ring finalized products manufactured in the seventh process according to actual needs and design requirements.

5. The method for forging and forming a locator sleeve and a locating hook ring according to claim 3, characterized in that: The setting temperature of the first primary forging in the third process is 900±50°C, and the setting temperature of the second two-stage forming forging in the fourth process is 700±50°C.

6. The method for forging and forming the locator sleeve and the locating hook ring according to claim 3, characterized in that: The process equipment and instruments used in the manufacturing method include a programmable industrial control computer (6), a bar blanking table (7), an automatic feeder (8), a material heater (9), a mechanical gripper, a forging press, a numerically controlled drilling machine (18), a conveying track (19), a product assembly inspection table (20), and a qualified product container (21). The mechanical gripper includes a first mechanical gripper to a fifth mechanical gripper (10-14), a total of five mechanical grippers; the forging press includes a first forging press to a third forging press (15-17), a numerically controlled drilling machine (18), a conveying track (19), a product assembly inspection table (20), and a qualified product container (21); the programmable industrial control computer (6) is respectively connected by electric wires to control the bar blanking table (7), the automatic feeder (8), the material heater (9), the first mechanical gripper to the fifth mechanical gripper (10-14), The first forging press to the third forging press (15-17), a CNC drilling machine (18), and a conveying track (190); the bar material blanking platform (7) is connected to the automatic feeder (8) and then connected to the material heater (9); the rear of the material heater (9) is connected to the first forging press (15) by a first mechanical gripper (10); the rear of the first forging press (15) is connected to the second forging press (16) by a second mechanical gripper (11); the rear of the second forging press (16) is connected to the third forging press (17) by a third mechanical gripper (12); the rear of the third forging press (17) is connected to the CNC drilling machine (18) by a fourth mechanical gripper (13); the rear of the CNC drilling machine (18) is connected to the conveying track (19) and the product assembly and inspection table (20) by a fifth mechanical gripper (14); the rear of the conveying track (19) is connected to a qualified product container (21).

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