A production method of wear-resistant material for high-speed rail current collecting slide plate

Abstract

The present invention discloses a production method of wear-resistant material for a high-speed railway current collecting slide plate, firstly select a copper plate, then press a plurality of evenly distributed grooves on one side of the copper plate, the copper plate is in the shape of one side groove and the other side convex; spray graphite powder on the copper plate so that the graphite powder is filled in the groove of the copper plate; use a soft roller to roll back and forth on the surface of the copper plate for many times so that the graphite powder is pressed into the groove; then clean the graphite powder on the surface of the copper plate; stack multiple layers of copper plates filled with graphite powder so that the convexity of one layer of copper plates is embedded in the groove of the adjacent layer of copper plates; then the pressing processing method presses the multiple layers of copper plates into one, obtains the stacked copper plates containing graphite powder, and empties the air in the groove. The production method of the wear-resistant material of the present invention has the advantages of simple process, easy implementation and low cost, can improve the wear resistance of the current collecting slide plate and can maintain lubrication between the contact network.

Description

Technical Field

[0001] This invention relates to a wear-resistant material, and more particularly to a method for producing a wear-resistant material for a high-speed rail sliding plate. Background Technology

[0002] The high-speed rail traction power supply system includes an overhead contact line, traction substations, and return circuits. The traction substations supply power to the overhead contact line, and the high-speed train draws this power back into the train to drive the variable frequency motors. The traction substations provide power to the overhead contact line. The pantograph on the high-speed train contacts the overhead contact line; the pantograph and overhead contact line together form the pantograph-contact line system, or simply the pantograph-contact line system. The folding device extending from the train roof is the pantograph; the line that directly contacts the pantograph is the contact wire, which is part of the overhead contact line. The high-speed train draws power from the overhead contact wire back into the train via the pantograph. The contact wire is made of metal, most commonly copper alloy, with aluminum being less common. The pantograph is the mechanism by which the train obtains power from the contact wire. While the pantograph itself is metal, the part that directly contacts the contact wire is not metal; this contact is achieved by a current-collecting plate on top of the pantograph. In a pantograph-catenary system, good contact between the pantograph and the contact wire is essential for proper pantograph-catenary coordination. At high speeds, the pantograph-catenary system in high-speed trains experiences intense friction. The contact wire and the current-collecting slide block come into contact; where there is contact, there is friction and wear.

[0003] For contact wires, pantograph contact plates, and train pantograph-catenary systems, the pantograph's current-collecting contact plate is the easiest to inspect and replace because the contact wire itself carries a 27.5kV high voltage. In existing technology, the contact wire is made of metal and has a relatively long service life. The current-collecting contact plate is generally made of carbon brushes, and the materials used to make carbon brushes include pure carbon, impregnated carbon with metal, aluminum-clad pure carbon, aluminum-clad impregnated carbon with metal, and copper-based powder metallurgy materials. Using pure carbon results in poor wear resistance, requiring frequent replacement of the current-collecting contact plate, leading to high maintenance costs. Metal materials composed of impregnated carbon with metal, aluminum-clad pure carbon, aluminum-clad impregnated carbon with metal, and copper-based powder metallurgy materials combined with graphite powder offer better wear resistance, but the processing technology is complex and the manufacturing cost is high. Summary of the Invention

[0004] To avoid the shortcomings of the existing technology, this invention provides a method for producing wear-resistant materials for high-speed rail flow receiving slides, thereby solving the problems of poor wear resistance or high manufacturing cost of traditional flow receiving slides.

[0005] The problem is that solar charging systems cannot charge simultaneously while using electricity.

[0006] The present invention adopts the following technical solution to solve the technical problem.

[0007] A method for producing a wear-resistant material for a high-speed rail current-receiving sliding plate, characterized by the following steps:

[0008] Step 1: First select a copper plate, then press multiple evenly distributed grooves on one side of the copper plate, so that the copper plate has a shape with grooves on one side and convexity on the other side.

[0009] Step 2: Spray graphite powder onto the copper plate so that the graphite powder fills the grooves in the copper plate;

[0010] Step 3: Roll a soft roller back and forth on the surface of the copper plate several times to press the graphite powder into the grooves; then clean the graphite powder off the surface of the copper plate.

[0011] Step 4: Stack multiple copper plates filled with graphite powder, so that the protrusions of one copper plate are embedded in the grooves of the adjacent copper plate; then press the multiple copper plates into one piece to obtain a stacked copper plate containing graphite powder, and remove the air from the grooves.

[0012] The pressing process is a cold pressing process.

[0013] Compared with existing technologies, the beneficial effects of this invention are reflected in:

[0014] This invention discloses a method for producing wear-resistant material for high-speed rail sliding plates. First, a copper plate is selected. Then, multiple evenly distributed grooves are pressed onto one side of the copper plate, resulting in a shape where one side is grooved and the other side is convex. Graphite powder is sprayed onto the copper plate, filling the grooves. A soft roller is repeatedly rolled back and forth on the surface of the copper plate, pressing the graphite powder into the grooves. The graphite powder on the surface of the copper plate is then cleaned. Multiple layers of copper plates filled with graphite powder are stacked, so that the convexity of one layer is embedded in the groove of the adjacent layer. Finally, a pressing process is used to press the multiple copper plates together to obtain a stacked copper plate containing graphite powder, and the air in the grooves is vented.

[0015] The method for producing wear-resistant materials according to the present invention has the advantages of simple process, easy implementation and low cost, and can improve the wear resistance of the flow receiving slide and maintain lubrication between it and the contact wire.

[0016] The present invention will be further described below through specific embodiments. Detailed Implementation

[0017] The present invention discloses a method for producing a wear-resistant material for a high-speed rail current-receiving sliding plate, comprising the following steps:

[0018] Step 1: First, select a copper plate, then press multiple evenly distributed grooves on one side of the copper plate, so that the copper plate has a shape with grooves on one side and convexity on the other side; the grooves are evenly distributed on the surface of the copper plate, and the density of the grooves can be adjusted according to actual needs; the shape of the grooves is preferably semi-circular, but other shapes of grooves can also be used; on the other side without grooves, there are corresponding convex parts at the corresponding positions of the grooves; the shape and size specifications of the convex parts are the same as those of the grooves.

[0019] Step 2: Spray graphite powder onto the copper plate so that the graphite powder fills the grooves in the copper plate; in practice, adjust the size of the grooves and the spacing between adjacent grooves according to the size of the graphite powder; the grooves can be arranged vertically or horizontally, or they can be arranged obliquely and crosswise.

[0020] Step 3: Roll a soft roller back and forth on the surface of the copper plate several times to press the graphite powder into the grooves; then clean the graphite powder off the surface of the copper plate; a rubber roller can be used to press the graphite powder into the grooves. Then use a soft brush to clean the graphite powder off the surface of the copper plate, so that the grooves are filled with graphite powder and the graphite powder is flush with the surface of the copper plate.

[0021] Step 4: Stack multiple copper plates filled with graphite powder, so that the protrusions of one copper plate are embedded in the grooves of the adjacent copper plate; then press the multiple copper plates into one piece to obtain a stacked copper plate containing graphite powder, and remove the air from the grooves.

[0022] Graphite powder is highly flammable in oxygen-rich environments. During operation, the sliding plate experiences increased friction temperature. If air is present in the grooves, the graphite powder will burn, significantly reducing its lubricating properties. The pressing method employs cold pressing, with pressure gradually increased until multiple copper plates are pressed together, ensuring that the graphite powder will not burn.

[0023] The pressing process is a cold pressing process. Specific implementation method one:

[0024] Step 1: First, select a copper plate. Then, press multiple evenly distributed grooves onto one side of the copper plate, resulting in a shape where one side is grooved and the other side is raised. The thickness of the copper plate is 0.5mm. The diameter of the grooves is 0.3mm, and the spacing between the grooves is 0.2mm.

[0025] Step 2: Spray graphite powder onto the copper plate so that the graphite powder fills the grooves in the copper plate; the size of the graphite powder is 100 mesh, which is 150μm.

[0026] Step 3: Roll a soft roller back and forth on the surface of the copper plate several times to press the graphite powder into the grooves; then clean the graphite powder off the surface of the copper plate.

[0027] Step 4: Stack multiple copper plates filled with graphite powder, so that the protrusions of one copper plate are embedded in the grooves of the adjacent copper plate; then press the multiple copper plates into one piece to obtain a stacked copper plate containing graphite powder, and remove the air from the grooves. Specific Implementation Method Two:

[0028] Step 1: First, select a copper plate. Then, press multiple evenly distributed grooves onto one side of the copper plate, resulting in a shape where one side is grooved and the other side is raised. The thickness of the copper plate is 0.8mm. The diameter of the grooves is 0.5mm, and the spacing between the grooves is 0.2mm.

[0029] Step 2: Spray graphite powder onto the copper plate so that the graphite powder fills the grooves in the copper plate; the size of the graphite powder is 60 mesh, which is 250μm.

[0030] Step 3: Roll a soft roller back and forth on the surface of the copper plate several times to press the graphite powder into the grooves; then clean the graphite powder off the surface of the copper plate.

[0031] Step 4: Stack multiple copper plates filled with graphite powder, so that the protrusions of one copper plate are embedded in the grooves of the adjacent copper plate; then press the multiple copper plates into one piece to obtain a stacked copper plate containing graphite powder, and remove the air from the grooves. Specific implementation method three:

[0032] Step 1: First, select a copper plate. Then, press multiple evenly distributed grooves onto one side of the copper plate, resulting in a shape where one side is grooved and the other side is raised. The thickness of the copper plate is 1mm. The diameter of the grooves is 0.6mm, and the spacing between the grooves is 0.2mm.

[0033] Step 2: Spray graphite powder onto the copper plate so that the graphite powder fills the grooves in the copper plate; the size of the graphite powder is 48 mesh, which is 300μm.

[0034] Step 3: Roll a soft roller back and forth on the surface of the copper plate several times to press the graphite powder into the grooves; then clean the graphite powder off the surface of the copper plate.

[0035] Step 4: Stack multiple copper plates filled with graphite powder, so that the protrusions of one copper plate are embedded in the grooves of the adjacent copper plate; then press the multiple copper plates into one piece to obtain a stacked copper plate containing graphite powder, and remove the air from the grooves.

[0036] This invention discloses a method for producing wear-resistant materials for high-speed rail current-collecting slide plates. First, grooves are pressed into a copper plate. Then, graphite powder is filled into the grooves. Multiple layers of copper plates are then stacked and cold-pressed, thus pressing the graphite powder and copper plates into a single unit. Graphite powder is uniformly distributed within the copper plate. This copper plate is then used to manufacture current-collecting slide plates, or contact components between the current-collecting slide plate and the overhead contact line. This results in the current-collecting slide plate maintaining not only good electrical conductivity but also good lubrication and wear resistance, thereby improving its service life.

[0037] Due to the extremely high speed of high-speed trains, friction exists between the current-collecting slide plate and the contact wire. If carbon brushes are used for the current-collecting slide plate, they are particularly prone to damage and require frequent replacement. If pure metal is used, the friction between the metals will be extremely easy to wear without lubrication. The production method of this invention manufactures copper plates, which can then be processed into current-collecting slide plates. This type of current-collecting slide plate has excellent wear resistance due to its copper body. Furthermore, the presence of graphite powder within the copper plate provides lubrication between the current-collecting slide plate and the contact wire, improving lubrication performance. Moreover, the use of copper results in good wear resistance, a long service life, and the maintenance of good electrical conductivity.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for producing a wear-resistant material for a high-speed rail receiving slide plate, characterized in that, Includes the following steps: Step 1: First select a copper plate, then press multiple evenly distributed grooves on one side of the copper plate, so that the copper plate has a shape with grooves on one side and convexity on the other side. Step 2: Spray graphite powder onto the copper plate so that the graphite powder fills the grooves in the copper plate; Step 3: Roll a soft roller back and forth on the surface of the copper plate several times to press the graphite powder into the grooves; then clean the graphite powder off the surface of the copper plate. Step 4: Stack multiple copper plates filled with graphite powder, so that the protrusions of one copper plate are embedded in the grooves of the adjacent copper plate; then press the multiple copper plates into one piece to obtain a stacked copper plate containing graphite powder, and remove the air from the grooves. The pressing method uses cold pressing, and the pressure is gradually increased until the multiple copper plates are pressed into one piece.