A contact wire drawing production apparatus
By installing an angle adjustment device in the five-die giant drawing machine, the raw material line enters the die at an inclined angle for drawing, which solves the problem of rapid die wear and improves the production efficiency of the contact line.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGYIN ELECTRICAL ALLOY
- Filing Date
- 2025-05-26
- Publication Date
- 2026-06-02
AI Technical Summary
The existing contact wire drawing equipment has molds that wear out quickly, resulting in low production efficiency and frequent mold polishing.
An angle adjustment device is installed between adjacent dies of the five-die giant drawing machine. By adjusting the pulleys and lifting structure, the raw material line enters the die at an inclined angle for drawing, reducing material blockage and friction in the upper part and extending the service life of the die.
Reduce mold wear, decrease the frequency of polishing, and improve the production efficiency of the contact line.
Smart Images
Figure CN224309307U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of contact wire production technology, specifically to a contact wire drawing production equipment. Background Technology
[0002] Rigid contact wire is an important component of the overhead contact system in electrified railways, primarily used to provide continuous electrical power to electric locomotives or EMU trains. Unlike traditional flexible conductors, rigid contact wire is made of hard metal materials, possessing high strength and rigidity. To ensure the strength of the product, rigid contact wire requires multiple drawing processes using drawing dies during actual production, resulting in significant wear and tear on the dies used in the drawing operations.
[0003] like Figure 1 As shown, during the drawing process of a typical finished contact wire 1, the deformation of the upper half of its cross-section is greater than that of the lower half. Therefore, the upper half of the contact wire experiences greater wear during drawing than the lower half, which often leads to the mold being scrapped due to wear of the upper drawing hole. Simultaneously, the mold itself also wears down during the drawing process, causing a deterioration in the surface quality of the contact wire. Therefore, it is necessary to polish the mold after drawing a certain length of contact wire before continuing the drawing process.
[0004] For example, Chinese patent application CN114713650A discloses a production process and apparatus for high-ductility, high-resistance-to-softening copper-chromium-zirconium contact wire. This process includes the following steps: Step 1, Drawing: The continuously extruded copper-chromium-zirconium rod is directly drawn into the finished shape on a five-die giant drawing machine; Step 2, Online Aging: The copper-chromium-zirconium rod from the five-die giant drawing machine enters an online aging device for heating; Step 3, Online Cooling: The copper-chromium-zirconium rod from the online aging device enters an online cooling device for water cooling to obtain a qualified finished product; Step 4, Packaging: The finished product is straightened by a straightening machine and then wound by a winding machine. This process can extend the service life of the contact wire while ensuring strength.
[0005] The aforementioned device directly draws the contact wire raw material into the finished product shape using a five-die giant drawing machine. During the drawing process, die wear is inevitable. Since the deformation of the upper half of the finished contact wire 1 is greater than that of the lower half, material blockage is prone to occur in the upper half of the die during actual production. This exacerbates the wear of the die and may even lead to the scrapping of the die in severe cases. In addition, material blockage will also increase the frequency of polishing treatment per unit time during the use of the die. Each polishing treatment requires machine shutdown, which will significantly reduce the production efficiency of copper wire.
[0006] Therefore, there is a need for contact wire drawing production equipment that can reduce mold wear and improve copper wire production efficiency. Utility Model Content
[0007] This utility model provides a contact wire drawing production equipment to solve the technical problem that the mold wear of existing contact wire drawing equipment is too fast, which leads to a reduction in production efficiency.
[0008] To solve the above problems, the contact wire drawing production equipment provided by this utility model adopts the following technical solution:
[0009] A contact wire drawing production equipment includes a wire feeding device, a five-die giant drawing machine, a straightening device, and a wire take-up device. The five-die giant drawing machine includes an angle adjustment device located between two adjacent dies. The angle adjustment device includes a fixed base, an adjusting pulley, and a lifting structure. The lifting structure is mounted on the fixed base, and the adjusting pulley is rotatably mounted on the lifting structure. The adjusting pulley is used to rotate and contact the contact wire and push the contact wire downward. The lifting structure is used to drive the adjusting pulley to move up and down.
[0010] This invention relates to a contact wire drawing production equipment. By installing an angle adjustment device between adjacent dies of a five-die giant drawing machine, the raw material wire before drawing can enter the die at a certain angle and be drawn under the action of adjusting pulleys and lifting structures. Compared with the horizontal drawing method of existing equipment, the inclined drawing method can extend the path of the upper part of the raw material wire through the die, providing additional extension space for the upper part of the raw material wire, thereby reducing the material blockage phenomenon in the upper part of the raw material wire. In addition, the downward inclination of the raw material wire can reduce the contact pressure between the raw material wire and the upper part of the die, thereby reducing the friction between the upper part of the raw material wire and the die, reducing the wear on the die, and reducing the frequency of polishing treatment per unit time, which can improve the production efficiency of contact wire.
[0011] Furthermore, the lifting structure includes a lead screw, a screw sleeve, and a rotating handle. The lead screw extends in the vertical direction and is rotatably mounted on a fixed base. The rotating handle is fixed to the top of the lead screw and is used for the operator to apply force to rotate the lead screw. The screw sleeve is sleeved on the lead screw and moves up and down on the lead screw through threaded engagement.
[0012] Furthermore, the axle of the adjusting pulley is fixed on the threaded sleeve so that the vertical position of the adjusting pulley can be adjusted by rotating the handle.
[0013] Furthermore, the angle adjustment device also includes a limiting pulley located below the adjusting pulley. The limiting pulley is rotatably mounted on the fixed base to limit the downward movement distance of the adjusting pulley.
[0014] Furthermore, the angle adjustment device also includes two guide pulleys located on the left and right sides of the adjustment pulley. The guide pulleys are mounted on the fixed base and can move up and down to make frictional contact with the contact wire to prevent the contact wire from swaying back and forth.
[0015] Furthermore, the five-die giant drawing machine includes, from left to right, a first bridging die, a second bridging die, a third bridging die, a fourth bridging die, and a finished product die. The die holes of the first bridging die, the second bridging die, the third bridging die, and the fourth bridging die are all circular holes with diameters decreasing from left to right. The shape of the die hole of the finished product die matches the structure of the contact wire finished product. The angle adjustment device is located between the fourth bridging die and the finished product die and is used to adjust the entry angle of the contact wire into the die.
[0016] Furthermore, when the adjusting pulley is in the lower limit position, the inclination angle of the contact line is 5 degrees.
[0017] The beneficial effects of the contact wire drawing production equipment provided by this utility model are:
[0018] 1. The contact wire drawing production equipment of this utility model sets an angle adjustment device between adjacent dies of the five-die giant drawing machine, so that the raw material wire before drawing can enter the die at a certain angle and be drawn under the action of the adjusting pulley and the lifting structure. Compared with the horizontal drawing method of the raw material wire in the existing equipment, the inclined drawing method can extend the path of the upper part of the raw material wire through the die, providing additional extension space for the upper part of the raw material wire, thereby reducing the blockage phenomenon of the upper part of the raw material wire. In addition, the downward inclination of the raw material wire can reduce the contact pressure between the raw material wire and the upper part of the die, thereby reducing the friction between the upper part of the raw material wire and the die, reducing the wear of the die and reducing the frequency of polishing treatment per unit time, which can improve the production efficiency of contact wire.
[0019] 2. The setting of the limit pulley restricts the maximum tilt angle of the contact wire, avoiding excessive tilt angle that could cause the wire to break or the lower side of the mold to wear out, thus ensuring the operational stability of the contact wire drawing production equipment.
[0020] 3. By setting two guide pulleys on the left and right sides of the adjusting pulley and making contact with the contact line, the shaking phenomenon generated by the contact line during the drawing process can be reduced, thereby allowing the contact line to enter the mold smoothly and reducing the wear of the mold. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the finished contact wire structure;
[0022] Figure 2 A schematic diagram of the structure of a contact wire drawing production equipment provided by this utility model;
[0023] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle;
[0024] Figure 4 This is a schematic diagram showing the working state of the angle adjustment device.
[0025] Figure 5 This is a schematic diagram of the mold structure.
[0026] Explanation of reference numerals in the attached figures:
[0027] 1. Finished contact wire; 2. Wire feeding device; 3. Five-die giant drawing machine; 31. First bridging die; 32. Second bridging die; 33. Third bridging die; 34. Fourth bridging die; 35. Finished die; 4. Straightening device; 5. Wire take-up device;
[0028] 6. Angle adjustment device; 61. Fixed base; 611. Support; 612. Mounting groove; 62. Adjusting pulley; 63. Lifting structure; 631. Lead screw; 632. Rotating handle; 633. Screw sleeve; 64. Limit pulley; 65. Guide pulley. Detailed Implementation
[0029] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.
[0030] Example 1 of a contact wire drawing production equipment provided by this utility model:
[0031] like Figures 1 to 5 As shown, the contact wire drawing production equipment includes, from left to right, a wire feeding device 2, a five-die giant drawing machine 3, a straightening device 4, and a wire take-up device 5. The wire feeding device 2 is used to input the raw material wire, the five-die giant drawing machine 3 is used to draw the raw material wire input by the wire feeding device 2 into contact wire, the straightening device 4 is used to straighten the contact wire output by the five-die giant drawing machine 3, and the wire take-up device 5 is used to collect the straightened contact wire.
[0032] like Figure 2 and Figure 5 As shown, the five-die giant drawing machine 3 includes, from left to right, a first cross-beam die 31, a second cross-beam die 32, a third cross-beam die 33, a fourth cross-beam die 34, an angle adjustment device 6, and a finished product die 35. The die holes of the first cross-beam die 31, the second cross-beam die 32, the third cross-beam die 33, and the fourth cross-beam die 34 are all circular with progressively decreasing diameters to gradually reduce the diameter of the raw material wire. The die hole shape of the finished product die 35 matches the shape of the contact wire finished product, and is used to draw the raw material wire into a defined shape.
[0033] like Figure 3 and Figure 4As shown, the angle adjustment device 6 includes a fixed base 61, an adjusting pulley 62, a lifting structure 63, a limiting pulley 64, and a guide pulley 65. The fixed base 61 is a rectangular plate extending horizontally between the fourth bridge mold 34 and the finished product mold 35. The adjusting pulley 62, lifting structure 63, and guide pulley 65 are all mounted on the fixed base 61. The lifting structure 63 includes a lead screw 631, a threaded sleeve 633, and a rotating handle 632. The lead screw 631 extends vertically. The fixed base 61 has a support 611, and the lead screw 631 is rotatably mounted on the support 611. The rotating handle 632 is fixedly mounted on the top of the lead screw 631 for the operator to apply force to rotate it. The threaded sleeve 633 is a rectangular block structure. The middle of the threaded sleeve 633 has a vertically extending threaded hole that matches the lead screw 631. The threaded sleeve 633 is fitted onto the lead screw 631 through the threaded hole and moves vertically while the lead screw 631 rotates. The axle of the adjusting pulley 62 is fixedly mounted on the threaded sleeve 633, so that it can move up and down under the drive of the rotating handle 632. The adjusting pulley 62 is used to rotate and contact the raw material line and push the raw material line downward under the action of the lifting structure 63, so that the raw material line has a certain tilt angle.
[0034] The limiting pulley 64 is a fixed pulley, which is rotatably mounted on the fixed base 61 and located below the adjusting pulley 62. The limiting pulley 64 is used to limit the maximum downward stroke of the adjusting pulley 62 and cooperate with the adjusting pulley 62 to rotate and convey the raw material line. When the raw material line contacts the limiting pulley 64 and the adjusting pulley 62 at the same time, the inclination angle of the raw material line relative to the horizontal plane is 5 degrees.
[0035] The guide pulleys 65 are two in number and are located on the left and right sides of the adjusting pulley 62 respectively. The fixed base 61 has two vertically extending rectangular mounting slots 612 corresponding to the two guide pulleys 65. The axle of the guide pulley 65 is adjustablely mounted on the mounting slot 612 by bolts so as to adjust the installation position of the guide pulley 65 on the mounting slot 612 according to the position of the raw material line. The guide pulley 65 is used to make frictional contact with the contact line to avoid the contact line from shaking back and forth.
[0036] The working principle of a contact wire drawing production equipment is summarized as follows:
[0037] During the initial material feeding process, rotating the rotary handle 632 causes the lead screw 631 to move the threaded sleeve 633 downwards, which in turn moves the adjusting pulley 62 downwards. The raw material line passes under the adjusting pulley 62 and through the finished product mold 35 to the right. As the raw material line moves to the right, it simultaneously rotates the adjusting pulley 62 and the limiting pulley 64. Then, the guide pulley 65 is adjusted so that it makes precise contact with the raw material line. At this point, the inclination angle of the raw material line is 5 degrees. Then, the finished product contact line 1 is drawn. In actual production, the polishing frequency of the finished product mold 35 is increased from once every 10,000 meters to once every 16,000 meters, extending the mold's service life and improving production efficiency.
[0038] Embodiment 2 of the contact wire drawing production equipment provided by this utility model:
[0039] Its main difference from Example 1 is:
[0040] In Example 1, the lifting structure includes a lead screw, a rotating handle, and a screw sleeve. The screw sleeve and adjusting pulley are moved up and down by manually rotating the lead screw.
[0041] In this embodiment, the lifting structure is a cylinder or an electric telescopic rod.
[0042] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.
[0043] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.
Claims
1. A contact wire drawing production equipment, comprising a wire feeding device, a five-die giant drawing machine, a straightening device, and a wire take-up device, characterized in that, The five-die giant drawing machine includes an angle adjustment device located between two adjacent dies. The angle adjustment device includes a fixed base, an adjusting pulley, and a lifting structure. The lifting structure is installed on the fixed base, and the adjusting pulley is rotatably installed on the lifting structure. The adjusting pulley is used to rotate and contact the contact line and push the contact line downward. The lifting structure is used to drive the adjusting pulley to move up and down.
2. The contact wire drawing production equipment according to claim 1, characterized in that, The lifting structure includes a lead screw, a screw sleeve, and a rotating handle. The lead screw extends vertically and is rotatably mounted on a fixed base. The rotating handle is fixed to the top of the lead screw and is used by the operator to apply force to rotate the lead screw. The screw sleeve is fitted onto the lead screw and moves up and down on the lead screw through a threaded connection.
3. The contact wire drawing production equipment according to claim 2, characterized in that, The axle of the adjusting pulley is fixed on the threaded sleeve, so that the vertical position of the adjusting pulley can be adjusted by rotating the handle.
4. The contact wire drawing production equipment according to claim 2, characterized in that, The angle adjustment device also includes a limiting pulley located below the adjusting pulley. The limiting pulley is rotatably mounted on the fixed base and is used to limit the downward movement distance of the adjusting pulley.
5. The contact wire drawing production equipment according to claim 1, characterized in that, The angle adjustment device also includes two guide pulleys located on the left and right sides of the adjustment pulley. The guide pulleys are mounted on the fixed base and can move up and down to make frictional contact with the contact wire to prevent the contact wire from swaying back and forth.
6. The contact wire drawing production equipment according to claim 1, characterized in that, The five-die giant drawing machine includes, from left to right, a first bridging die, a second bridging die, a third bridging die, a fourth bridging die, and a finished product die. The die holes of the first bridging die, the second bridging die, the third bridging die, and the fourth bridging die are all circular holes with diameters decreasing from left to right. The shape of the die hole of the finished product die matches the structure of the contact wire finished product. The angle adjustment device is located between the fourth bridging die and the finished product die and is used to adjust the entry angle of the contact wire into the die.
7. The contact wire drawing production equipment according to claim 1, characterized in that, When the adjusting pulley is in the lower limit position, the inclination angle of the contact line is 5 degrees.