Inclined surface scraping method and inclined reverse scraping knife

Abstract

The present invention discloses a method for scraping an inclined surface and an inclined reverse scraper, comprising the following steps: configuring an inclined reverse scraper, the inclined reverse scraper comprising a clamping tool rod, an extension tool rod, and a working portion arranged at the far end of the extension tool rod; controlling the inclined reverse scraper to feed along the inclined angle into the through hole of the workpiece to be processed, and holding the scraping blade against the area to be processed; controlling the workpiece to be processed to rotate and perform scraping. The beneficial effects of the present invention are mainly reflected in: configuring an inclined reverse scraper with a unique structure, supplemented by inclined feeding, controlling the specific position of the inclined reverse scraper after feeding, ensuring that the scraper does not interfere with the through hole during processing, and at the same time ensuring the maximum rigidity of the scraper to prevent vibration marks from occurring on the surface of the part to be processed, so as to meet the technical requirements of fine processing scraping.

Description

Technical Field

[0001] The invention relates to the technical field of metal cutting, and in particular to an inclined surface scraping method and an inclined reverse scraping tool. Background Art

[0002] In the oil and gas industry, the sealing bevel inside the gate valve usually has an angle of 5°-8°. For the processing of the sealing bevel inside the gate valve, the key point is to achieve high rigidity of the tool and avoid interference. In the existing technical processing, a horizontal eccentric scraper is generally used. However, in order to avoid interference, the diameter of the guide rod must be sacrificed, so the tool rod will inevitably become thinner. During the processing, since the entire scraper must pass through the inclined hole, the slender guide rod will vibrate greatly. On the one hand, the technical requirements for fine processing of the scraped surface cannot be met, and vibration marks will appear on the surface of the machined part. On the other hand, the vibrating tool rod will cause the blade to hit the surface of the workpiece to be processed vertically, which will cause the blade to break. Changing the tool is time-consuming and labor-intensive, and the cost increases. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an inclined surface scraping method and an inclined reverse scraping knife.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A method for scraping an inclined surface comprises the following steps:

[0006] Step S1, configuring an inclined reverse scraping knife, the inclined reverse scraping knife comprising a clamping knife bar, an extension knife bar, and a working part arranged at the distal end of the extension knife bar, the working part comprising a detachable scraping blade, the extension knife bar being inclined relative to the clamping knife bar, the inclination angle being greater than the inclination angle of the inclined surface, the maximum width of the working part being equal to the outer diameter of the surface to be processed of the workpiece to be processed, the minimum width being equal to the inner diameter of the surface to be processed of the workpiece to be processed, and the diameter of the extension knife bar being equivalent to the minimum width of the working part;

[0007] Step S2, clamping the clamping tool bar and the workpiece to be processed on the tool holder and the rotary chuck of the lathe respectively; the installation angle of the clamping tool bar on the tool holder is equal to the inclination angle of the inclined surface;

[0008] Step S3, controlling the inclined reverse scraper to advance along the inclined angle into the through hole of the workpiece to be processed, and moving the scraper blade against the area to be processed; controlling the workpiece to be processed to rotate and perform scraping processing.

[0009] Preferably, after the step S3 controls the inclined reverse scraper to advance, it includes a position adjustment step of the inclined reverse scraper, controlling the distal end of the extended tool rod to be located on the rotation axis of the workpiece to be processed, controlling the outermost side of the scraper blade to be flush with the outermost side of the workpiece to be processed, and the end face center of the proximal end of the extended tool rod coincides with the proximal end face center of the workpiece to be processed.

[0010] Preferably, the cutting width of the scraping blade is equal to the annular width of the surface to be processed of the workpiece to be processed.

[0011] Preferably, the extending tool rod is offset on one side of the clamping tool rod.

[0012] Preferably, the inclination angle of the extended blade rod is equal to twice the inclination angle of the inclined surface.

[0013] The present invention discloses an inclined reverse scraping knife, comprising a clamping tool rod, an extending tool rod, and a working part arranged at the far end of the extending tool rod, the working part comprising a detachable scraping blade, the extending tool rod being inclined relative to the clamping tool rod, the inclination angle being greater than the inclination angle of the inclined surface, the maximum width of the working part being equal to the outer diameter of the surface to be processed of the workpiece to be processed, the minimum width being equal to the inner diameter of the surface to be processed of the workpiece to be processed, the diameter of the extending tool rod being equivalent to the minimum width of the working part, the cutting width of the scraping blade being equal to the circular width of the surface to be processed of the workpiece to be processed; the extending tool rod is offset on one side of the clamping tool rod.

[0014] Preferably, the inclination angle of the extended blade rod is equal to twice the inclination angle of the inclined surface.

[0015] The beneficial effects of the present invention are mainly reflected in: configuring an inclined reverse scraper with a unique structure, and assisting with inclined feed, controlling the specific position of the inclined reverse scraper after feed, ensuring that the scraper does not interfere with the through-hole during processing, and at the same time ensuring the maximum rigidity of the scraper, preventing vibration marks from occurring on the surface of the part to be processed, so as to meet the technical requirements of fine processing scraping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0017] Figure 1 : A front view of an embodiment of an inclined reverse scraping knife of the present invention;

[0018] Figure 2 : Bottom view of an embodiment of an inclined reverse scraping knife of the present invention;

[0019] Figure 3 : A schematic diagram of the working embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0021] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified 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, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0022] like Figures 1 to 3 As shown, the present invention discloses a method for scraping an inclined surface, comprising the following steps:

[0023] Step S1, configure an inclined reverse scraper, the inclined reverse scraper includes a clamping tool bar 1, an extension tool bar 2, and a working part 3 arranged at the far end of the extension tool bar 2, the working part 3 includes a detachable scraper blade 4, the extension tool bar 2 is inclined relative to the clamping tool bar 1, the inclination angle is greater than the inclination angle α of the inclined surface, the maximum width L1 of the working part 3 is equal to the outer diameter of the surface to be processed of the workpiece to be processed, the minimum width L2 is equal to the inner diameter of the surface to be processed of the workpiece to be processed, the diameter of the extension tool bar 2 is equivalent to the minimum width L2 of the working part 3; the cutting width of the scraper blade 4 is equal to the ring width of the surface to be processed of the workpiece to be processed. The extension tool bar 2 is offset to one side of the clamping tool bar 1.

[0024] Step S2, clamping the clamping tool bar 1 and the workpiece to be processed on the tool holder and the rotary chuck of the lathe respectively; the installation angle of the clamping tool bar 1 on the tool holder is equal to the inclination angle α of the inclined surface.

[0025] Step S3, control the inclined reverse scraper to enter the through hole of the workpiece to be processed along the inclined angle α, and move the scraper blade 4 against the area to be processed; control the workpiece to be processed to rotate and perform scraping processing.

[0026] In this preferred embodiment, the processing surface of the workpiece to be processed is a distal vertical surface, and the angle of the proximal inclined surface is 5°; the inner diameter of the through hole is H2, and in step S3, the inclined reverse scraper is controlled to enter the through hole of the workpiece to be processed along the inclined angle of 5°. After passing through the through hole, the position adjustment step of the inclined reverse scraper is included, that is, the extended tool rod 2 is controlled to be moved along the inclined angle of 5°. Figure 3 Adjust in the A direction so that the distal end of the scraper is located on the rotation axis of the workpiece to be processed, and control the outermost side of the scraper blade 4 to be flush with the outermost side of the workpiece to be processed, that is, the rotation radius of the scraper blade 4 is L1. The center of the end face of the proximal end of the extended tool rod 2 coincides with the center of the proximal end face of the workpiece to be processed. It should be noted that the cross-section of the extended tool rod 2 is cylindrical, and it is inclined so that the upper vertex of the circular surface at the distal end coincides with the rotation axis of the workpiece to be processed. Preferably, the inclination angle of the extended tool rod 2 is equal to twice the inclination angle α of the inclined surface, and therefore, the proximal end of the extended tool rod 2 is symmetrically arranged on the axis of the workpiece to be processed.

[0027] The present invention changes the conventional prior art of using a horizontal eccentric scraper and adopts a unique structural design so that the extended blade of the entire inclined reverse scraper can be as thick as possible, thus achieving optimal rigidity, effective shock resistance and guaranteed surface quality of parts processing.

[0028] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0029] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. Inclined surface scraping method, characterized in that: The following steps are included: Step S1, configuring an inclined reverse scraping knife, the inclined reverse scraping knife comprising a clamping knife bar (1), an extension knife bar (2), and a working portion (3) arranged at the distal end of the extension knife bar (2), the working portion (3) comprising a detachable scraping blade (4), the extension knife bar (2) being inclined relative to the clamping knife bar (1), the inclination angle being greater than the inclination angle (α) of the inclined surface, the maximum width (L1) of the working portion (3) being equal to the outer diameter of the surface to be processed of the workpiece to be processed, the minimum width (L2) being equal to the inner diameter of the surface to be processed of the workpiece to be processed, and the diameter of the extension knife bar (2) being equivalent to the minimum width (L2) of the working portion (3); Step S2, clamping the clamping tool bar (1) and the workpiece to be processed on the tool holder and the rotary chuck of the lathe respectively; the installation angle of the clamping tool bar (1) on the tool holder is equal to the inclination angle (α) of the inclined surface; Step S3, controlling the inclined reverse scraping knife to enter the through hole of the workpiece to be processed along the inclined angle (α) of the inclined surface, and moving the scraping blade (4) against the area to be processed; controlling the workpiece to be processed to rotate and perform scraping processing; After the step S3 controls the inclined reverse scraper to advance, it includes a step of adjusting the position of the inclined reverse scraper, controlling the distal end of the extended tool rod (2) to be located on the rotation axis of the workpiece to be processed, controlling the outermost side of the scraper blade (4) to be flush with the outermost side of the workpiece to be processed, and the end face center of the proximal end of the extended tool rod (2) to coincide with the end face center of the proximal end of the workpiece to be processed.

2. The inclined surface scraping method according to claim 1, characterized in that: The cutting width of the scraping blade (4) is equal to the circular width of the surface to be processed of the workpiece to be processed.

3. The inclined surface scraping method according to claim 1, characterized in that: The extended knife rod (2) is offsetly arranged on one side of the clamping knife rod (1).

4. The inclined surface scraping method according to claim 3, characterized in that: The inclination angle of the extended blade rod (2) is equal to twice the inclination angle (α) of the inclined surface.

5. The inclined reverse scraping knife using the inclined surface scraping method according to claim 1 is characterized in that: The invention comprises a clamping tool rod (1), an extension tool rod (2), and a working part (3) arranged at the far end of the extension tool rod (2), the working part (3) comprising a detachable scraping blade (4), the extension tool rod (2) being arranged obliquely relative to the clamping tool rod (1), the inclination angle being greater than the inclination angle (α) of the inclined surface, the maximum width (L1) of the working part (3) being equal to the outer diameter of the surface to be processed of the workpiece to be processed, the minimum width (L2) being equal to the inner diameter of the surface to be processed of the workpiece to be processed, the diameter of the extension tool rod (2) being equivalent to the minimum width (L2) of the working part (3), the cutting width of the scraping blade (4) being equal to the circular width of the surface to be processed of the workpiece to be processed; the extension tool rod (2) being arranged offset on one side of the clamping tool rod (1).

6. The inclined reverse scraper according to claim 5, characterized in that: The inclination angle of the extended blade rod (2) is equal to twice the inclination angle (α) of the inclined surface.

Images