A grinding method for a curved surface grinding machine

Abstract

The present invention provides a groove rail grinding device and a grinding method using a curved surface grinder, which relates to the technical field of rail grinding and maintenance, and solves the technical problem that the existing grinding equipment cannot effectively grind the groove rail and is difficult to achieve the purpose of maintenance and repair. The grinding device includes a curved surface grinder, which uses the circumferential surface of the grinding wheel to contact the groove rail profile surface and can perform forward and reverse bidirectional grinding; the curved surface grinder includes a first grinding unit, a second grinding unit, a third grinding unit and a fourth grinding unit; the first grinding unit, the second grinding unit, the third grinding unit and the fourth grinding unit are connected in sequence, and can grind different positions of the groove rail profile surface, and after being combined, the groove rail profile surface can be completely enveloped. The present invention ensures the grinding quality and efficiency by combining multiple groups of grinding units, achieves the purpose of maintenance and repair, and solves the problem that large grinders cannot be used for grinding due to size reasons.

Description

Technical Field

[0001] The invention relates to the technical field of rail grinding and maintenance, and in particular to a grinding method of a curved surface grinder. Background Art

[0002] As an extension of rail transit lines, trams have become an important part of urban rail transit lines with their advantages of energy saving, environmental protection, safety and comfort. At present, there are more and more construction and operation lines in many cities. Tram track lines are horizontal to the road surface, so grooved rails are used to match the wheels of trams. The state of grooved rails directly affects the safety and comfort of tram operation. At present, the most economical and effective way to maintain and repair grooved rails is to implement grinding.

[0003] The quality of small-scale grinding machines and manual grinding varies, the grinding efficiency is low, and the grinding area is discontinuous. Medium-sized grinding machines cannot grind the turnout area, and after grinding, the profile surface is easily insufficiently ground, there are multiple continuous small sections on the profile surface, and the wave wear disease cannot be removed. The grinding effect is difficult to achieve the purpose of groove rail maintenance and repair. Large-scale grinding machines cannot be put into operation due to the large size of the vehicle and the limited space.

[0004] The applicant has found that the prior art has at least the following technical problems:

[0005] The existing grinding equipment cannot effectively grind the grooved rails, making it difficult to achieve the purpose of maintenance and repair. Summary of the invention

[0006] The purpose of the present invention is to provide a groove rail grinding device and a grinding method using a curved surface grinder to solve the technical problem that the existing grinding equipment in the prior art cannot effectively grind the groove rail and is difficult to achieve the purpose of maintenance and repair. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a groove rail grinding device using a curved surface grinder, comprising a curved surface grinder, wherein the curved surface grinder utilizes the circumferential surface of a grinding wheel to contact a groove rail profile surface and is capable of performing forward and reverse bidirectional grinding; the curved surface grinder comprises a first grinding unit, a second grinding unit, a third grinding unit and a fourth grinding unit; the first grinding unit, the second grinding unit, the third grinding unit and the fourth grinding unit are connected in sequence, and are capable of grinding different positions of the groove rail profile surface, and are capable of performing complete envelope grinding of the groove rail profile surface after being combined.

[0009] Optionally, the first grinding unit, the second grinding unit and the fourth grinding unit are all single grinding heads, and the third grinding unit is a double grinding head.

[0010] Optionally, the first grinding unit, the second grinding unit, and the fourth grinding unit can be equipped with a grinding wheel or a paper grinding wheel; the grinding wheel is a 25mm grinding wheel, a 35mm grinding wheel, or a 60mm grinding wheel, and the paper grinding wheel is a 50mm paper grinding wheel.

[0011] Optionally, the grinding wheel of the first grinding unit is a 25 mm grinding wheel, the grinding wheel of the second grinding unit is a 25 mm grinding wheel, and the grinding wheel of the fourth grinding unit is a 60 mm grinding wheel.

[0012] Optionally, the first grinding unit, the second grinding unit, and the fourth grinding unit are all capable of adjusting the grinding position and angle, so that the grinding range covers any angle of the cross section of the grooved rail.

[0013] Optionally, the first polishing unit and the fourth polishing unit can also polish the grooved rail by using a paper grinding wheel.

[0014] Optionally, the first grinding unit, the second grinding unit and the fourth grinding unit can also perform floating grinding, using the paper grinding wheel to grind the turnout core, fork tip and switch restriction area.

[0015] Optionally, the third grinding unit can be equipped with a 25 mm grinding wheel, a 35 mm grinding wheel or a 60 mm grinding wheel to perform balanced grinding on the top surface of the grooved rail.

[0016] A grinding method, using any of the above-mentioned grooved rail grinding devices using a curved surface grinder for grinding, comprising the following steps: the first grinding unit, the second grinding unit, the third grinding unit and the fourth grinding unit are connected in sequence; the grinding wheel models of the grinding heads of the first grinding unit, the second grinding unit, the third grinding unit and the fourth grinding unit are selected and the grinding wheels are installed, and the respective grinding positions and angles are adjusted to jointly completely envelope the grooved rail profile; the grinding speed and grinding power of the grinding device are set; the grooved rail is forwardly ground; the grinding wheels of the first grinding unit and the fourth grinding unit are replaced with each other for reverse grinding; the grinding wheel of the first grinding unit or the fourth grinding unit is replaced with a 50mm paper grinding wheel, and the turnout core, fork tip and rut of the grooved rail are polished and ground.

[0017] Optionally, in the forward grinding or reverse grinding step, in the switch center, fork tip and switch restriction area of ​​the grooved rail, the second grinding unit increases the grinding wheel jump at the place where the top surface width is less than 20 mm at the profile change section, switch center and point rail, and the first grinding unit, the third grinding unit and the fourth grinding unit increase the grinding wheel jump at the place where the profile change section and the angle gap between the point rail and the basic rail is less than 10 mm.

[0018] Any of the above technical solutions can at least produce the following technical effects:

[0019] The present invention grinds away the crack initiation zone before the cracks on the grooved rail profile surface begin to expand, thereby preventing the generation and development of contact fatigue-type corrugation, eliminating or controlling profile surface defects, and ensuring the profile surface state and good appearance. The grooved rail profile surface can be grinded into the optimal wheel-rail contact geometry by combining multiple groups of grinding units, ensuring the grinding quality and efficiency, greatly improving the wheel-rail relationship, and delaying the generation of corrugation and other fatigue damage. Moreover, the size of the present invention can be set as needed, solving the size problem of large grinders, and by grinding the defects that have already occurred on the profile surface, the defects of the grooved rail and the turnout are eliminated or reduced, and the profile surface diseases are repaired, thereby achieving the purpose of maintenance and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the combination of the grinding units of the present invention;

[0022] Figure 2 It is a schematic diagram of the grinding state of each grinding unit of the present invention;

[0023] Figure 3 is a schematic diagram of the grinding position of the first grinding unit of the present invention;

[0024] Figure 4 is a schematic diagram of the grinding position of the second grinding unit of the present invention;

[0025] Figure 5 is a schematic diagram of the grinding position of the third grinding unit of the present invention;

[0026] Figure 6 is a schematic diagram of the grinding position of the fourth grinding unit of the present invention;

[0027] Figure 7 It is a schematic diagram of the lifting and jumping in the turnout grinding area of ​​the present invention.

[0028] In the figure, 1 is the first grinding unit; 2 is the second grinding unit; 3 is the third grinding unit; 4 is the fourth grinding unit. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] The present invention provides a groove rail grinding device using a curved surface grinding machine, such as Figure 1-2 As shown, it includes a curved surface grinder, which uses the circumferential surface of the grinding wheel to contact the groove rail profile surface, and can perform forward and reverse bidirectional grinding, thereby improving the applicability of the present invention. The curved surface grinder includes a first grinding unit 1, a second grinding unit 2, a third grinding unit 3, and a fourth grinding unit 4. The first grinding unit 1, the second grinding unit 2, the third grinding unit 3, and the fourth grinding unit 4 are connected in sequence, and from left to right in the figure are the first grinding unit 1, the second grinding unit 2, the third grinding unit 3, and the fourth grinding unit 4. Each grinding unit is structurally connected by a pull rod in the prior art, and is connected by electrical equipment and communication lines to realize communication and control between each grinding unit. It is possible to grind different positions of the groove rail profile surface, and after combination, it is possible to perform complete envelope grinding on the groove rail profile surface, thereby realizing the full coverage grinding of the groove rail and the turnout by the present invention. The present invention grinds away the crack initiation zone before the cracks on the grooved rail profile surface begin to expand, thereby preventing the generation and development of contact fatigue-type corrugation, eliminating or controlling profile surface defects, and ensuring the profile surface state and good appearance. The grooved rail profile surface can be grinded into the optimal wheel-rail contact geometry by combining multiple groups of grinding units, ensuring the grinding quality and efficiency, greatly improving the wheel-rail relationship, and delaying the generation of corrugation and other fatigue damage. Moreover, the size of the present invention can be set as needed, solving the size problem of large grinders, and by grinding the defects that have already occurred on the profile surface, the defects of the grooved rail and the turnout are eliminated or reduced, and the profile surface diseases are repaired, thereby achieving the purpose of maintenance and repair.

[0031] As an optional implementation, Figure 2As shown, the first grinding unit 1, the second grinding unit 2, and the fourth grinding unit 4 are all single grinding heads, which are convenient for flexible adjustment of the grinding position and angle; the third grinding unit 3 is a double grinding head, which is convenient for balanced grinding of the groove rail. In the figure, ①②③④ respectively represent the contact position diagrams of the first grinding unit 1, the second grinding unit 2, the third grinding unit 3, and the fourth grinding unit 4 with the groove rail. The combination of the two grinding heads with different structures improves the applicability of the present invention and ensures the grinding quality and efficiency.

[0032] As an optional implementation, the first grinding unit 1, the second grinding unit 2, and the fourth grinding unit 4 can be equipped with a grinding wheel or a paper grinding wheel. The grinding wheel is a 25mm grinding wheel, a 35mm grinding wheel, or a 60mm grinding wheel, and the paper grinding wheel is a 50mm paper grinding wheel. The grinding wheel of the first grinding unit 1 is a 25mm grinding wheel, the grinding wheel of the second grinding unit 2 is a 25mm grinding wheel, the grinding wheel of the third grinding unit 3 is two 35mm grinding wheels, and the grinding wheel of the fourth grinding unit 4 is a 60mm grinding wheel. The first grinding unit 1, the second grinding unit 2, the third grinding unit 3, and the fourth grinding unit 4 are equipped with grinding wheels of different sizes to facilitate the matching of the grinding unit with the profile of the grooved rail. Figure 3 As shown in the figure, the first grinding unit 1 selects a 25mm grinding wheel to cover the R80 area on the outer side of the grooved rail. This setting will increase the grinding amount of the outer R80 area so that the wheel does not contact this area during operation, improving the wheel-rail relationship. Figure 4 As shown in the figure, the second grinding unit 2 selects a 25mm grinding wheel to cover the inner R13 and R80 areas. This setting will increase the grinding amount of the inner R13 and R80 areas so that the wheel does not contact this area during operation, improving the wheel-rail relationship. Figure 5 As shown, the third grinding unit 3 selects a 35mm grinding wheel to cover the inner R13, R80, and R300 areas of the profile, and the outer R300 and R80 areas, and partially overlaps the R300 area, so as to balance the grinding of the entire groove rail profile and eliminate longitudinal rail defects such as profile wave wear. The third grinding unit 3 can also select a 25mm grinding wheel and a 60mm grinding wheel. Figure 6 As shown, the fourth grinding unit selects a 60mm grinding wheel to cover the entire profile R80, R300, and R80 areas, eliminate or control profile defects, ensure the profile state and good appearance, reduce or delay the occurrence of profile diseases, and improve running smoothness. When reverse grinding, the grinding wheels of the first grinding unit 1 and the fourth grinding unit 4 can be interchanged. Through the combination of the first grinding unit 1, the second grinding unit 2, the third grinding unit 3, and the fourth grinding unit 4, the profile of the grooved rail is fully covered and ground, ensuring the grinding quality.

[0033] As an optional implementation, the first grinding unit 1, the second grinding unit 2, and the fourth grinding unit 4 can all adjust the grinding position and angle, so that the grinding range covers any angle of the cross section of the grooved rail. The first grinding unit 1, the second grinding unit 2, and the fourth grinding unit 4 are all single grinding heads, and the grinding position and angle can be adjusted by rotating and contracting the grinding heads, thereby ensuring that the first grinding unit 1, the second grinding unit 2, and the fourth grinding unit 4 can achieve full coverage of the grooved rail after being combined, that is, covering any angle of the cross section of the grooved rail.

[0034] As an optional implementation, the first grinding unit 1 and the fourth grinding unit 4 can also polish the grooved rail by means of a paper grinding wheel. After grinding, the first grinding unit 1 and the fourth grinding unit 4 are directly polished after replacing the paper grinding wheel, thereby improving the applicability of the present invention. There is no need to use other polishing equipment, and the grinding process of the grooved rail is also simplified.

[0035] As an optional implementation, the first grinding unit 1, the second grinding unit 2, and the fourth grinding unit 4 can also perform floating grinding, using a paper grinding wheel to grind the turnout core, fork tip, and switch restriction area. Figure 7 As shown, ①②③④ in the figure represent the first grinding unit 1, the second grinding unit 2, the third grinding unit 3 and the fourth grinding unit 4 respectively. Since the turnout core, fork tip and rut are restricted areas, the second grinding unit 2 will be raised to jump the grinding wheel at the cross-section change of the profile, the turnout core and the point rail where the top surface width is less than 20mm, and the first grinding unit 1, the third grinding unit 3 and the fourth grinding unit 4 will be raised to jump the grinding wheel at the cross-section change of the profile and the angle gap between the point rail and the base rail is less than 10mm. After the grinding of other areas of the turnout is completed, the first grinding unit 1 or the fourth grinding unit 4 is replaced with a 50mm paper grinding wheel to perform non-damaging polishing and grinding on the turnout core, fork tip and rut, thereby completing the full coverage grinding of the grooved rail line and the turnout.

[0036] As an optional implementation, the grinding speed and grinding power of the curved surface grinder can be adjusted to accommodate different types of grooved rails.

[0037] A grinding method is provided, which uses the groove rail grinding device using the curved surface grinder provided by the present invention for grinding, and comprises the following steps: a first grinding unit 1, a second grinding unit 2, a third grinding unit 3 and a fourth grinding unit 4 are connected in sequence; the grinding wheel models of the grinding heads of the first grinding unit 1, the second grinding unit 2, the third grinding unit 3 and the fourth grinding unit 4 are selected and the grinding wheels are installed, and the respective grinding positions and angles are adjusted to jointly completely envelop the groove rail profile surface; the grinding speed and the grinding power of the grinding device are set; the groove rail is forwardly ground; the grinding wheels of the first grinding unit 1 and the fourth grinding unit 4 are replaced with each other to perform reverse grinding; the grinding wheel of the first grinding unit 1 or the fourth grinding unit 4 is replaced with a 50 mm paper grinding wheel, and the turnout core, fork tip and rut of the groove rail are polished and ground.

[0038] As an optional implementation, in the forward grinding or reverse grinding step, in the switch center, fork tip and switch restriction area of ​​the grooved rail, the second grinding unit 2 increases the grinding wheel jump at the profile change section, switch center and point rail where the top surface width is less than 20 mm, and the first grinding unit 1, the third grinding unit 3 and the fourth grinding unit 4 increase the grinding wheel jump at the profile change section and the angle gap between the point rail and the basic rail is less than 10 mm.

[0039] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A grinding method for a curved surface grinder, characterized in that: The curved surface grinding machine comprises a first grinding unit, a second grinding unit, a third grinding unit and a fourth grinding unit. The curved surface grinding machine utilizes the circumferential surface of the grinding wheel to contact the profile surface of the groove rail and can perform forward and reverse bidirectional grinding; the first grinding unit, the second grinding unit and the fourth grinding unit are all single grinding heads, and the third grinding unit is a double grinding head; the first grinding unit, the second grinding unit and the fourth grinding unit can be equipped with a grinding wheel or a paper grinding wheel; the grinding wheel is a 25mm grinding wheel, a 35mm grinding wheel or a 60mm grinding wheel, and the paper grinding wheel is a 50mm paper grinding wheel; the third grinding unit can be equipped with a 25mm grinding wheel, a 35mm grinding wheel or a 60mm grinding wheel to perform balanced grinding on the top surface of the groove rail; The polishing method comprises the following steps: The first grinding unit, the second grinding unit, the third grinding unit and the fourth grinding unit are connected in sequence; Selecting the grinding wheel models of the grinding heads of the first grinding unit, the second grinding unit, the third grinding unit and the fourth grinding unit and installing the grinding wheels, adjusting the respective grinding positions and angles, and jointly completely enveloping the grooved rail profile surface; Set the grinding speed and grinding power of the grinding unit; Performing positive grinding on the grooved rail; The grinding wheels of the first grinding unit and the fourth grinding unit are replaced with each other to perform reverse grinding; The grinding wheel of the first grinding unit or the fourth grinding unit is replaced with a 50 mm paper grinding wheel to polish and grind the turnout core, fork tip and switch of the grooved rail.

2. The grinding method of the curved surface grinding machine according to claim 1, characterized in that: The grinding wheel of the first grinding unit is a 25 mm grinding wheel, the grinding wheel of the second grinding unit is a 25 mm grinding wheel, and the grinding wheel of the fourth grinding unit is a 60 mm grinding wheel.

3. The grinding method of the curved surface grinding machine according to claim 1, characterized in that: The first grinding unit, the second grinding unit and the fourth grinding unit can all adjust the grinding position and angle, so that the grinding range can cover any angle of the cross section of the grooved rail.

4. The grinding method of the curved surface grinding machine according to claim 1, characterized in that: The first grinding unit, the second grinding unit and the fourth grinding unit can also perform floating grinding, using the paper grinding wheel to grind the turnout core, fork tip and switch restriction area.

5. The grinding method of the curved surface grinding machine according to claim 1, characterized in that: In the forward grinding or reverse grinding step, in the switch center, fork tip and switch restriction area of ​​the grooved rail, the second grinding unit increases the grinding wheel jump at the profile change section, switch center and point rail where the top surface width is less than 20 mm, and the first grinding unit, the third grinding unit and the fourth grinding unit increase the grinding wheel jump at the profile change section and the angle gap between the point rail and the base rail where the gap is less than 10 mm.

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