CN115990645A - Stay wire shell processing die and method thereof - Google Patents
Stay wire shell processing die and method thereof Download PDFInfo
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- CN115990645A CN115990645A CN202310229795.2A CN202310229795A CN115990645A CN 115990645 A CN115990645 A CN 115990645A CN 202310229795 A CN202310229795 A CN 202310229795A CN 115990645 A CN115990645 A CN 115990645A
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Abstract
The application relates to the technical field of processing of parts of an electrified railway contact net, and particularly discloses a stay wire shell processing die and a stay wire shell processing method. According to the technical scheme, the flat pipe is rapidly processed into the stay wire shell by the water expansion die and the forming die, the adopted hot pressing forming technology is used for avoiding the defects of the stay wire shell in the process of air hole, shrinkage, stress concentration and the like, the use safety performance and quality of the product are improved, and the hidden danger of safety accidents is reduced.
Description
Technical Field
The invention relates to the technical field of processing of parts of an electrified railway contact net, in particular to a stay wire shell processing die and a stay wire shell processing method.
Background
The stay wire shell is also called a double-lug wedge-shaped wire clamp, is suitable for connecting the terminal ends of a bearing rope, a transverse bearing rope, an upper and lower positioning rope, a compensation rope and the like with lug-shaped parts by using metal stranded wires in an electrified railway contact net system, and is widely used on railways and high-speed railway gasification lines. The existing stay wire shell is produced by casting steel pieces, and the cast stay wire shell is easy to generate defects in the process of air holes, shrinkage, stress concentration and the like, so that the use safety coefficient of the parts is reduced, and the hidden danger of accidents is increased. In view of the above, enterprises consider that the stay wire shell is integrally machined in a pressure machining mode, and compared with casting machining, the stay wire shell produced by pressure machining is compact in structure and high in mechanical property, and the use safety coefficient of the stay wire shell is enhanced. However, the wire casing cannot be formed at one time by press working, multiple press working combinations are required, and the multiple press working combinations need to be matched with multiple sets of working dies, so designing a corresponding die for multiple times of working of the wire casing is one of the problems to be solved in the prior art.
Disclosure of Invention
The invention aims to provide a stay wire shell processing die and a stay wire shell processing method, which are used for solving the problem that the existing pressure processing is not performed for a plurality of times.
In order to solve the problems, the technical scheme is as follows:
the processing die for the stay wire shell comprises a water expansion die and a forming die, wherein the water expansion die comprises a water expansion upper die and a water expansion lower die, a jack-up hole is arranged in the middle of the water expansion lower die, core rods are slidably inserted into two ends of the water expansion upper die and the water expansion lower die after the water expansion upper die and the water expansion lower die are clamped, and water injection holes are formed in the core rods; the forming die comprises an upper forming die and a lower forming die, one end of the upper forming die and one end of the lower forming die are slidably inserted with a forming mandrel after being clamped, and the other end of the upper forming die and the other end of the lower forming die are slidably inserted with a shaping die with a forming port.
A processing method of a stay wire shell comprises the following steps:
1) Preparing materials: processing Q355 round steel pipes with the volume of the blanking material being 110% of that of the two final formed parts into flat pipes;
3) Primary water expansion: placing the flat tube into a water expansion die, closing and compacting the water expansion upper die and the water expansion lower die, plugging two ends of the flat tube by a core rod, pressurizing a liquid medium into the flat tube through a water injection hole of the core rod, and water expanding the flat tube to form a middle blank body with an expanded middle part;
3) Sawing: the middle blank is taken, sawed and evenly divided into two sections, one end of the two ends of the cut blank is big, and the other end is small;
4) Cutting: cutting the two ends of the cut blank by a laser cutting machine to obtain a blank to be shaped, the material volume of which is equal to that of the formed stay wire shell;
5) And (3) final forming: placing the blank to be shaped into a die cavity of a lower molding die, closing and compacting the upper molding die and the lower molding die, and simultaneously moving a molding mandrel and the shaping die to a cavity in the middle of the molding die to press the blank to be shaped to obtain a molded stay wire shell;
6) Annealing: and placing the processed wire drawing shell in an annealing furnace for annealing and stress relief.
The beneficial effect of this technical scheme lies in:
1. compared with the existing casting mode for producing the stay wire shell, the technical scheme adopts the water expansion die and the forming die to extrude the flat tube to quickly form the stay wire shell, the water expansion die and the forming die are dies in the hot-press processing forming technology, the produced stay wire shell has high mechanical property, no defects of air holes, shrinkage, stress concentration and the like in the process, the use safety performance and quality of the stay wire shell are improved, and the hidden danger of safety accidents is reduced.
2. Compared with the traditional casting mode, the water expansion die and the forming die extrude the flat tube to form the wire-drawing shell rapidly, the process waste generated in the processing process is less, the forming quality is high, the noise in the hot-pressing processing process is low, and the influence on the environment is small.
Further, a first die groove capable of being attached to the middle blank is formed in the water expansion upper die, a second die groove capable of being attached to the middle blank is formed in the water expansion lower die, and the first die groove and the second die groove can be spliced into the shape of the middle blank. And closing the water expansion upper die and the water expansion lower die to form the intermediate blank body in one step.
Further, a third die groove capable of being attached to the stay wire shell is formed in the upper molding die, a fourth die groove capable of being attached to the stay wire shell is formed in the lower molding die, and the third die groove and the fourth die groove can be spliced into the shape of the stay wire shell. The upper molding die and the lower molding die are matched to mold the stay wire housing at one time.
Further, a positioning sleeve is tightly attached to one side of the forming die, and the forming mandrel firstly penetrates through the positioning sleeve and then is inserted into the third die groove. The positioning sleeve can limit the forming mandrel to be quickly inserted into a die cavity formed after the forming die is assembled.
Further, the peripheries of the water expansion upper die, the water expansion lower die, the forming upper die and the forming lower die are provided with strip-shaped positioning grooves. The strip-shaped positioning groove is matched with the multi-directional hydraulic machine, so that the water expansion upper die, the water expansion lower die, the forming upper die and the forming lower die can be stably arranged on the multi-directional hydraulic machine.
Further, the surface of the flat tube in the step 1) is coated with a layer of graphite powder. The graphite powder makes the surface of the flat tube more lubricated, and is convenient to take out after compression molding.
Further, the liquid pressure for water expansion in the step 2) is 20-30Mpa.
Further, the annealing furnace temperature in the step 6) is set to 800-900 ℃. The annealing furnace in the temperature range has the best effect of eliminating the internal stress of the stay wire housing and improving the plasticity and toughness of the stay wire housing.
Drawings
FIG. 1 is a schematic diagram of a water expansion die of the invention;
FIG. 2 is a schematic view of a molding die according to the present invention;
FIG. 3 is a schematic diagram showing a split structure of a molding die of the present invention;
FIG. 4 is a schematic structural view of an intermediate blank;
fig. 5 is a schematic structural view of the wire housing.
Reference numerals in the drawings of the specification include: the water expansion die 1, the forming die 2, the water expansion upper die 11, the water expansion lower die 12, the top pin hole 121, the core rod 13, the water injection hole 131, the strip-shaped positioning groove 3, the forming upper die 21, the forming lower die 22, the forming core shaft 23, the positioning sleeve 24, the shaping die 25 and the forming opening 251.
Detailed Description
The following is a further detailed description of the embodiments:
the embodiment is basically as shown in the accompanying figures 1-5:
the processing die of the stay wire shell comprises a water expansion die 1 and a forming die 2, as shown in fig. 1, the water expansion die 1 comprises a water expansion upper die 11 and a water expansion lower die 12, a first die groove capable of being attached to an intermediate blank is formed in the water expansion upper die 11, a second die groove capable of being attached to the intermediate blank is formed in the water expansion lower die 12, the first die groove and the second die groove can be spliced into a shape of the intermediate blank, a jacking hole 121 penetrating through the upper part and the lower part of the water expansion lower die 12 is machined in the middle of the water expansion lower die 12, a mandrel 13 is slidably inserted into two ends of the water expansion upper die 11 and the water expansion lower die 12 after the two ends of the water expansion upper die 11 and the two ends of the water expansion lower die 12 are clamped, a water injection hole 131 capable of being communicated with a peripheral liquid medium is machined in the mandrel 13, and a strip-shaped positioning groove 3 matched with a multidirectional hydraulic press is formed in the peripheries of the water expansion upper die 11 and the water expansion lower die 12;
as shown in fig. 2-3, the forming die 2 includes a square forming upper die 21 and a forming lower die 22, the four corners of the forming lower die 22 are provided with concave grooves, the four corners of the forming upper die 21 are provided with bosses matched with the grooves, the forming upper die 21 is internally provided with a third die groove capable of being attached with a middle stay wire shell, the forming lower die 22 is internally provided with a fourth die groove capable of being attached with a stay wire shell, the third die groove and the fourth die groove can be spliced into a stay wire shell shape, after the forming upper die 21 and the forming lower die 22 are clamped, the left end is slidably inserted with a forming mandrel 23, the forming mandrel 23 firstly passes through a positioning sleeve 24 and then is inserted into the forming die 2, the positioning sleeve 24 is tightly attached to the side surface of the forming die 2, after the clamping, the right end is slidably inserted with a shaping die 25 with a self-provided forming opening 251, and the periphery of the forming upper die 21 and the forming lower die 22 is also provided with a strip positioning groove 3 matched with a multidirectional hydraulic press.
The processing method of the stay wire shell comprises the following steps:
1) Preparing materials: processing Q355 round steel pipes with the volume of the blanking material being 110% of that of the two final formed parts into flat pipes, and coating a layer of graphite powder on the surfaces of the flat pipes;
2) Primary water expansion: the strip-shaped positioning grooves 3 on the periphery of the water expansion upper die 11 and the water expansion lower die 12 are matched with a multi-directional hydraulic machine, so that the water expansion die 1 is arranged in the multi-directional hydraulic machine, a flat pipe is placed in the water expansion lower die 12, the water expansion upper die 11 and the water expansion lower die 12 are clamped and pressed, then the core rods 13 are used for sealing two ends of the flat pipe, a liquid medium is pressurized into the flat pipe through water injection holes 131 of the core rods 13, the liquid pressure is 23Mpa, the flat pipe is water-expanded to form a middle blank body with the expanded middle part shown in fig. 4, and ejector pins on the multi-directional hydraulic machine eject the middle blank body through ejector pin holes 121 of the water expansion lower die 12;
3) Sawing: the middle blank is sawed into two sections according to the broken line shown in fig. 4, one end of the two ends of the cut blank is big, and the other end is small;
4) Cutting: cutting the two ends of the cut blank by a laser cutting machine to obtain a blank to be shaped, the material volume of which is equal to that of the formed stay wire shell;
5) And (3) final forming: the forming die 2 is arranged in the multidirectional hydraulic press through the matching of the positioning grooves 3 of the outer Zhou Tiaoxing of the forming upper die 21 and the outer Zhou Tiaoxing of the forming lower die 22 and the multidirectional hydraulic press, a blank to be shaped is placed in a fourth die groove of the forming lower die 22, the forming upper die 21 and the forming lower die 22 are clamped and pressed, the forming mandrel 23 and the shaping die 25 are inserted into the forming die 2 and simultaneously move towards a cavity in the middle of the forming die 2, the two ends of the cut blank are pressed to obtain a formed wire drawing shell, and the formed wire drawing shell is shown in fig. 5;
6) Annealing: and placing the processed wire drawing shell in an annealing furnace with the temperature set to 850 ℃ for annealing and stress relief.
The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (9)
1. The utility model provides a shell mold processing of acting as go-between, includes water mould and forming die, its characterized in that: the water expansion die comprises a water expansion upper die and a water expansion lower die, wherein a jack-up hole is arranged in the middle of the water expansion lower die, core rods are inserted into the two ends of the water expansion upper die and the water expansion lower die in a sliding manner after the water expansion upper die and the water expansion lower die are clamped, and water injection holes are formed in the core rods; the forming die comprises an upper forming die and a lower forming die, one end of the upper forming die and one end of the lower forming die are slidably inserted with a forming mandrel after being clamped, and the other end of the upper forming die and the other end of the lower forming die are slidably inserted with a shaping die with a forming port.
2. A stay wire shell processing method is characterized in that: the processing method comprises the following steps:
1) Preparing materials: processing Q355 round steel pipes with the volume of the blanking material being 110% of that of the two final formed parts into flat pipes;
2) Primary water expansion: placing the flat tube into a water expansion die, closing and compacting the water expansion upper die and the water expansion lower die, plugging two ends of the flat tube by a core rod, pressurizing a liquid medium into the flat tube through a water injection hole of the core rod, and water expanding the flat tube to form a middle blank body with an expanded middle part;
3) Sawing: the middle blank is taken, sawed and evenly divided into two sections, one end of the two ends of the cut blank is big, and the other end is small;
4) Cutting: cutting the two ends of the cut blank by a laser cutting machine to obtain a blank to be shaped, the material volume of which is equal to that of the formed stay wire shell;
5) And (3) final forming: placing the blank to be shaped into a die cavity of a lower molding die, closing and compacting the upper molding die and the lower molding die, and simultaneously moving a molding mandrel and the shaping die to a cavity in the middle of the molding die to press the blank to be shaped to obtain a molded stay wire shell;
6) Annealing: and placing the processed wire drawing shell in an annealing furnace for annealing and stress relief.
3. The wire casing machining die of claim 1, wherein: the water-swelling upper die is internally provided with a first die cavity which can be attached to the middle blank, the water-swelling lower die is internally provided with a second die cavity which can be attached to the middle blank, and the first die cavity and the second die cavity can be spliced into the shape of the middle blank.
4. The wire casing machining die of claim 1, wherein: the upper molding die is internally provided with a third die groove which can be attached to the stay wire shell, the lower molding die is internally provided with a fourth die groove which can be attached to the stay wire shell, and the third die groove and the fourth die groove can be spliced into the shape of the stay wire shell.
5. The wire casing machining die of claim 1, wherein: one side of the forming die is tightly adhered with a positioning sleeve, and the forming mandrel firstly penetrates through the positioning sleeve and then is inserted into the third die groove.
6. The wire casing machining die of claim 1, wherein: the periphery of the water expansion upper die, the water expansion lower die, the molding upper die and the molding lower die are provided with strip-shaped positioning grooves.
7. The method for processing a wire casing according to claim 2, wherein: and (3) coating a layer of graphite powder on the surface of the flat tube in the step 1).
8. The method for processing a wire casing according to claim 2, wherein: the liquid pressure for water expansion in the step 2) is 20-30Mpa.
9. The method for processing a wire casing according to claim 2, wherein: the temperature of the annealing furnace in the step 6) is set to be 800-900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310229795.2A CN115990645A (en) | 2023-03-06 | 2023-03-06 | Stay wire shell processing die and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310229795.2A CN115990645A (en) | 2023-03-06 | 2023-03-06 | Stay wire shell processing die and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115990645A true CN115990645A (en) | 2023-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310229795.2A Pending CN115990645A (en) | 2023-03-06 | 2023-03-06 | Stay wire shell processing die and method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN115990645A (en) |
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2023
- 2023-03-06 CN CN202310229795.2A patent/CN115990645A/en active Pending
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