Blade polishing device

Abstract

The application discloses a blade polishing device in the technical field of blade polishing, which comprises a base, a constraint assembly arranged on the base, a polishing assembly and at least one blade clamp; the polishing assembly comprises a first polishing surface and a second polishing surface which are oppositely arranged and can be deformed under the action of external force; the first polishing surface is made to adhere to the blade pressure surface through the constraint assembly, and the second polishing surface is made to adhere to the blade back surface, so that the blade pressure surface and the blade back surface are simultaneously polished, the overall device structure is simple, the dependence on a five-axis machining center is eliminated, the cost of a belt is lower and the flexibility is better in terms of a tool, the use of a polishing wheel with higher cost is avoided, the machining cost is reduced, and the form of surface-to-surface contact is adopted in terms of a machining method, the complex tool path is simplified, and higher machining efficiency is achieved.

Description

Technical Field

[0001] This invention relates to the field of blade polishing technology, specifically to a blade polishing device. Background Technology

[0002] Compressor blades and stator blades for aero-engines are generally made from forged blanks. After CNC milling, the blade surfaces require polishing to remove milling cutter marks and ensure a certain surface roughness. Currently, the commonly used methods are manual polishing and CNC polishing. Manual polishing is difficult to guarantee machining quality and is highly technical, and is gradually being replaced by CNC polishing technology. CNC polishing generally uses CBN polishing wheels to polish along the blade surface trajectory.

[0003] Current CNC polishing methods rely on five-axis or more complex CNC machining equipment, requiring the design of specially sized polishing wheels and the programming of relatively complex surface toolpaths. During machining, the contact area between the polishing wheel and the blade surface is small. These factors result in high machining costs and low machining efficiency for CNC polishing, which is not conducive to large-scale application.

[0004] Based on this, the present invention designs a blade polishing device to solve the above problems. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a blade polishing device for polishing blade profiles, comprising a base and a constraint component, a polishing component, and at least one blade clamp disposed on the base; the polishing component includes a first polishing surface and a second polishing surface disposed opposite to each other and deformable under external force; the constraint component includes a blade basin pressing block and a driving unit for driving the blade basin pressing block to move, wherein a first side of the blade basin pressing block has a blade basin contour groove matching the shape of the blade blade basin surface; the blade clamp is used to install the blade between the first polishing surface and the second polishing surface, with the blade blade basin surface facing the first polishing surface and the blade back surface facing the second polishing surface; the blade basin pressing block is located on the back side of the first polishing surface and is used to press the first polishing surface from the back side through the contour groove, so that the first polishing surface fits against the blade blade basin surface for polishing, and the second polishing surface is used to fit against the blade back surface for polishing under the action of the constraint component, so as to achieve simultaneous polishing of the blade blade basin surface and the blade back surface.

[0006] As a further embodiment of the present invention, the polishing assembly includes a sanding belt assembly; the sanding belt assembly includes a sanding belt and a drive wheel assembly, the area enclosed by the sanding belt on the drive wheel assembly is the working area, the blade is set in the working area by a blade clamp, the surface of the sanding belt opposite to the blade's blade facet is the first polishing surface, and the surface opposite to the blade's back facet is the second polishing surface.

[0007] As a further embodiment of the present invention, the polishing assembly includes two independent abrasive belt assemblies; the abrasive belt assembly includes an abrasive belt and a drive wheel assembly, the abrasive belt is sleeved on the drive wheel assembly, and the blade is disposed in the gap formed between the abrasive belts of the two abrasive belt assemblies by a blade clamp, wherein one abrasive belt of the two abrasive belt assemblies forms a first polishing surface opposite to the blade's blade facet, and the other abrasive belt forms a second polishing surface opposite to the blade's back face.

[0008] As a further embodiment of the present invention, the blade clamp is slidably disposed on the base, and the blade is pushed to move by the blade basin pressing block so that the back of the blade is squeezed to deform the second polished surface and fits against the second polished surface.

[0009] As a further embodiment of the present invention, a blade back pressing block is installed on the base. The blade back pressing block is located on the back side of the second polished surface. The side of the blade back pressing block facing the second polished surface has a blade back contouring groove that matches the shape of the back side of the blade. The blade back pressing block is driven by a driving unit. The blade back contouring groove on the blade back pressing block presses the second polished surface from the back side of the second polished surface, so that the second polished surface fits against the back side of the blade. Alternatively, the blade back pressing block is fixedly installed on the base. The blade is pushed close to the blade back pressing block by the blade basin pressing block, so that the second polished surface fits against the back side of the blade, and its back side fits against the blade back contouring groove on the blade back pressing block.

[0010] As a further embodiment of the present invention, the drive wheel assembly includes at least one movable wheel and at least one drive wheel; the movable wheel is slidably disposed on the base and is used to retract when the sanding belt sleeved on the movable wheel is subjected to external force to prevent the sanding belt from breaking; the drive wheel is disposed on the base and is used to drive the sanding belt to move; a position holding component is installed on the base and is used to generate an elastic force opposite to the direction of movement of the movable wheel when the position of the movable wheel changes, so as to continuously provide tension to the sanding belt.

[0011] As a further embodiment of the present invention, the position holding assembly includes a fixing block and a spring, the fixing block being fixedly mounted on the base, and the two ends of the spring being connected to the fixing block and a movable wheel, respectively.

[0012] As a further embodiment of the present invention, the base is provided with a slide rail, and the blade basin pressing block and the blade clamp are slidably disposed on the slide rail, or the blade basin pressing block and the blade back pressing block are slidably disposed on the slide rail.

[0013] As a further embodiment of the present invention, the drive unit includes a lead screw, and the blade basin pressure block is threadedly engaged with the lead screw; or, the lead screw is provided with two sections of threads with opposite directions of rotation, and the blade basin pressure block and the blade back pressure block are respectively threadedly engaged with the threads with opposite directions of rotation at both ends of the lead screw.

[0014] As a further embodiment of the present invention, the width of the sand belt is the same as the height of the blade profile.

[0015] The present invention has the following beneficial effects:

[0016] This device uses a sanding belt to form a first polishing surface and a second polishing surface arranged opposite to each other. The blade is installed between the first polishing surface and the second polishing surface by a blade clamp, with the blade facet facing the first polishing surface and the blade back facet facing the second polishing surface. Finally, a constraint component makes the first polishing surface fit against the blade facet and the second polishing surface fit against the blade back facet, achieving simultaneous polishing of both the blade facet and the blade back facet. The overall device has a simple structure, eliminating the dependence on a five-axis machining center. In terms of cutting tools, the sanding belt is lower in cost and more flexible, avoiding the use of more expensive polishing wheels and reducing processing costs. In terms of processing method, a surface-to-surface contact method is adopted, simplifying complex toolpaths and achieving higher processing efficiency.

[0017] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the first example structure of the polishing unit of the present invention.

[0020] Figure 2 This is a schematic diagram of a second example structure of the polishing unit of the present invention.

[0021] Figure 3 This is a schematic diagram of a second installation example of the blade back pressure block 32 of the present invention.

[0022] Legend:

[0023] 1. Base; 2. Blade clamp; 31. Blade basin pressing block; 311. Blade basin contouring groove; 32. Blade back pressing block; 321. Blade back contouring groove; 33. Telescopic motor; 34. Lead screw; 35. Slide rail; 41. Sanding belt; 411. First polishing surface; 412. Second polishing surface; 42. Movable wheel; 421. Fixed block; 422. Spring; 423. Guide rail; 424. Slider; 43. Drive wheel; 431. Drive motor. Detailed Implementation

[0024] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0025] This application provides a blade polishing device for simultaneously polishing both the leaf base and the leaf back of a blade.

[0026] like Figure 1-3 As shown, the blade polishing device includes a base 1 and a constraint assembly, a blade clamp 2 and a polishing assembly disposed on the base 1.

[0027] The polishing assembly includes a first polishing surface 411 and a second polishing surface 412 arranged opposite to each other. Both the first polishing surface 411 and the second polishing surface 412 are formed by the grinding surface of the abrasive belt 41, and the abrasive belt 41 is sleeved on the drive wheel assembly and driven by the drive wheel assembly.

[0028] The drive wheel assembly includes at least one movable wheel 42 and at least one drive wheel 43. The movable wheel 42 is slidably mounted on the base 1. When the sanding belt 41 mounted on the movable wheel 42 is subjected to external force, the movable wheel 42 will retract to prevent the sanding belt 41 from breaking. A position holding component is installed on the base 1 to generate a spring force opposite to the direction of movement of the movable wheel 42 when the position of the movable wheel 42 changes, so as to continuously provide tension to the sanding belt 41 and keep the sanding belt 41 taut. The drive wheel 43 is used to drive the sanding belt 41 mounted on the drive wheel 43.

[0029] The blade clamp 2 is used to install the blade between the first polishing surface 411 and the second polishing surface 412, so that the blade basin face is opposite to the first polishing surface 411 and the blade back face is opposite to the second polishing surface 412.

[0030] The constraint assembly includes a blade basin pressing block 31 and a driving unit for moving the blade basin pressing block 31. The first side of the blade basin pressing block 31 is provided with a blade basin contour groove 311 that matches the shape of the blade basin surface. Since the shape of the blade basin contour groove 311 matches the blade basin surface, the blade basin contour groove 311 of the blade basin pressing block 31 presses the first polishing surface 411 from the back of the first polishing surface 411. As long as the pressing distance is sufficient, the first polishing surface 411 can be made to fit against the blade basin surface. Under the drive of the drive wheel assembly, the sanding belt 41 can polish the blade basin surface through the first polishing surface 411.

[0031] The second polishing surface 412 is used to polish the blade under external force by adhering to the back surface of the blade, so as to achieve simultaneous polishing of the blade's leaf basin surface and back surface.

[0032] Figure 1The first example of the constraint assembly is shown. In this example, the blade clamp 2 is slidably disposed on the base 1. After the blade basin pressing block 31 pushes the first polished surface 411 to adhere to the blade basin surface, the blade basin pressing block 31 continues to move, which can push the blade on the blade clamp 2 to move as well. At this time, the blade moves in the direction of the second polished surface 412. Finally, the back surface of the blade will contact the second polished surface 412 and push the second polished surface 412 to deform. Since the back surface of the blade is an outwardly convex surface, when the back surface of the blade pushes the second polished surface 412 to deform, the second polished surface 412 can adhere to the back surface of the blade.

[0033] Figure 2-3 A second example of the constraint assembly is shown. In this example, the constraint assembly also includes a blade back pressing block 32, which is disposed on the back side of the second polished surface 412 on the base 1. The blade back pressing block 32 has a blade back contouring groove 321 on the side facing the second polished surface 412. The blade back contouring groove 321 of the blade back pressing block 32 compresses the second polished surface 412 from the back side, thereby making the second polished surface 412 fit more closely to the back side of the blade.

[0034] Figure 2 The first installation example of the blade back pressing block 32 is shown. In this example, the blade back pressing block 32 is driven by a drive unit. The drive unit drives the blade back pressing block 32 to press the second polishing surface 412 from the back side of the second polishing surface 412, so that the second polishing surface 412 is close to the back of the blade until it is in contact, thereby increasing the polishing effect.

[0035] Figure 3 A second installation example of the blade back pressing block 32 is shown. In this example, the blade back pressing block 32 is fixedly set on the base 1. After the blade is pushed to contact the second polishing surface 412 by the blade basin pressing block 31, it continues to move until the back side of the second polishing surface 412 fits into the blade back contour groove 321 opened in the blade back pressing block 32, so that the second polishing surface 412 fits into the back side of the blade more closely, thereby increasing the polishing effect.

[0036] Figure 1The first example of a polishing assembly is shown. In this example, the polishing assembly includes an abrasive belt 41 and a drive wheel assembly. The abrasive belt 41 is fitted onto the drive wheel assembly, with the grinding surface of the abrasive belt 41 facing inward. The area enclosed by the abrasive belt 41 is the polishing area. The blade is installed in the polishing area by a blade clamp 2, so that the blade's facet and back face are opposite to the grinding surface of the abrasive belt 41. The grinding surface opposite the blade's facet is the first polishing surface 411, and the grinding surface opposite the blade's back face is the second polishing surface 412. By setting the blade in the working area enclosed by the abrasive belt 41 and cooperating with a constraint assembly, the blade's facet and back face can simultaneously conform to the grinding surface of the abrasive belt 41. The structure of the constraint assembly has been described in detail above and will not be repeated here. This allows a single abrasive belt 41 to simultaneously grind the blade's facet and back face, improving grinding efficiency. It has lower processing costs than traditional CNC polishing, lower processing difficulty than manual polishing, and lower skill requirements for the operator.

[0037] Figure 2 A second example of a polishing assembly is shown. In this example, the polishing assembly includes two abrasive belts 41 and two drive wheel sets. The two abrasive belts 41 are respectively fitted onto the two drive wheel sets, with the abrasive surfaces of the abrasive belts 41 facing outwards. The two drive wheel sets arrange the two abrasive belts 41 opposite each other on the base 1. The blade is mounted between the two abrasive belts 41 by a blade clamp 2. Each of the two abrasive belts 41 has a surface facing the blade. The abrasive surface facing the blade's facet is the first polishing surface 411, and the abrasive surface facing the blade's back face is the second polishing surface 412. This is further enhanced by a constraint assembly, the structure of which has been described in detail previously. Without going into too much detail, the first polishing surface 411 and the second polishing surface 412 can simultaneously polish the blade's base surface and back surface, improving polishing efficiency. This process is less expensive than traditional CNC polishing, less difficult than manual polishing, and requires less skill from the operator. In this example, the first polishing surface 411 and the second polishing surface 412 are formed on two different sanding belts 41. Therefore, the frictional forces on the first polishing surface 411 and the second polishing surface 412 will act on the two sanding belts 41 and the two drive wheel sets respectively, resulting in less pressure on the drive wheel sets and less wear on the sanding belts 41.

[0038] like Figure 2 As shown, in some examples, multiple blade clamps 2 are provided along the length direction of the first polishing surface 411 or the second polishing surface 412, which can simultaneously prevent multiple blades between the first polishing surface 411 and the second polishing surface 412. In conjunction with multiple constraint components, multiple blades can be polished at the same time, further improving polishing efficiency.

[0039] like Figure 1As shown, the position holding component includes a fixed block 421 fixed on the base 1 and a spring 422 connecting the fixed block 421 and the movable wheel 42. When the constraint component presses the first polishing surface 411 or the second polishing surface 412, the movable wheel 42 will move closer to the drive wheel 43. At this time, the distance between the movable wheel 42 and the fixed block 421 will increase. The spring 422, which connects the fixed block 421 and the movable wheel 42, will be stretched and generate an elastic force in the direction of the fixed block 421. This elastic force will eventually act on the sanding belt 41 through the movable wheel 42, serving as the tension force to keep the sanding belt 41 taut. Subsequently, when the constraint component no longer applies pressure to the sanding belt 41, the movable wheel 42 will return to its initial position under the action of the spring 422, so that the movable wheel 42 can continuously provide tension force to the sanding belt 41, keeping the sanding belt 41 taut, thereby ensuring the polishing effect and also ensuring the service life of the sanding belt 41.

[0040] Figure 1 An example installation of the movable wheel 42 is shown, such as Figure 1 As shown, a guide rail 423 is fixedly installed on the base 1. The axis of the guide rail 423 is extended and passes through the shaft of the drive wheel 43. A slider 424 is slidably installed on the guide rail 423. The movable wheel 42 is installed on the slider 424, thereby realizing that the movable wheel 42 is slidably installed on the base 1. At the same time, the guide rail 423 restricts the sliding direction of the movable wheel 42, thereby ensuring the stability of the movable wheel 42.

[0041] Figure 1 An example of the installation of the drive wheel 43 is shown, such as Figure 1 As shown, a drive motor 431 is installed on the base 1, and the drive wheel 43 is fixed on the output shaft of the drive motor 431. The drive motor 431 drives the drive wheel 43 to rotate, thereby driving the sanding belt 41 sleeved on the drive wheel 43 to move.

[0042] The drive unit can be a telescopic motor 33, an electric actuator, a cylinder, or a lead screw 34. This application does not limit this, as long as it can drive the blade basin pressure block 31 and the blade back pressure block 32 in the constraint assembly to move.

[0043] Figure 1 An example of a drive unit is shown. In this example, the drive unit is a telescopic motor 33, which is fixedly mounted on the base 1. The telescopic motor 33 pushes the blade basin pressing block 31 or the blade back pressing block 32 to move, so as to squeeze the sand belt 41.

[0044] Figure 2Another example of a drive unit is shown. In this example, the drive unit is a lead screw 34. One end of the lead screw 34 is equipped with a torque output component for driving the lead screw 34 to rotate. When the lead screw 34 is used to drive the blade basin pressure block 31 alone, the blade basin pressure block 31 is threaded onto the lead screw 34. The rotation of the lead screw 34 drives the movement of the blade basin pressure block 31. When the lead screw 34 is used to drive both the blade basin pressure block 31 and the blade back pressure block 32 simultaneously, the lead screw 34 has threads with opposite directions at both ends. The blade basin pressure block 31 and the blade back pressure block 32 are respectively engaged on the two threads with opposite directions. In this way, when the lead screw 34 rotates, the blade basin pressure block 31 and the blade back pressure block 32 will move in opposite directions to achieve simultaneous control of the blade basin pressure block 31 and the blade back pressure block 32.

[0045] like Figure 3 As shown, in some examples, a slide rail 35 is installed on the base 1 to limit the movement trajectory of the blade basin pressing block 31, the blade clamp 2 and the blade back pressing block 32, so as to ensure the stability of the overall device.

[0046] In some examples, the height of the abrasive belt 41 is equal to the height of the blade profile, so that the first polishing surface 411 and the second polishing surface 412 can completely fit the blade's base surface and back surface, achieving comprehensive polishing of the blade's base surface and back surface, thereby improving polishing efficiency.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A blade polishing device for polishing blade profiles, characterized in that, Includes a base (1) and a constraint assembly, a polishing assembly and at least one blade clamp (2) disposed on the base (1); The polishing assembly includes a first polishing surface (411) and a second polishing surface (412) that are arranged opposite to each other and can deform under external force. The constraint assembly includes a leaf basin pressing block (31) and a driving unit for driving the leaf basin pressing block (31) to move. The first side of the leaf basin pressing block (31) is provided with a leaf basin contour groove (311) that matches the shape of the leaf basin surface. The blade clamp (2) is used to install the blade between the first polishing surface (411) and the second polishing surface (412), and to make the blade basin face opposite to the first polishing surface (411) and the blade back face opposite to the second polishing surface (412); The leaf basin pressing block (31) is located on the back side of the first polishing surface (411) and is used to press the first polishing surface (411) from the back side through the contour groove so that the first polishing surface (411) fits against the leaf basin surface of the blade for polishing. The second polishing surface (412) is used to fit against the back side of the blade for polishing under the action of the constraint component, so as to achieve simultaneous polishing of the leaf basin surface and the back side of the blade. The polishing assembly includes a sanding belt assembly; The sanding belt assembly includes a sanding belt (41) and a drive wheel assembly. The area enclosed by the sanding belt (41) on the drive wheel assembly is the working area. The blade is placed in the working area by the blade clamp (2). The surface of the sanding belt (41) opposite to the blade's blade facet is the first polishing surface (411), and the surface opposite to the blade's back facet is the second polishing surface (412). The base (1) is equipped with a blade back pressing block (32), which is located on the back side of the second polishing surface (412). The blade back pressing block (32) has a blade back contour groove (321) that matches the shape of the blade back side on the side facing the second polishing surface (412). The blade back pressing block (32) is driven by the driving unit. The blade back contouring groove (321) opened in the blade back pressing block (32) presses the second polishing surface (412) from the back side, so that the second polishing surface (412) fits the back side of the blade. The drive unit includes a lead screw (34) with two threads in opposite directions. The blade basin pressure block (31) and the blade back pressure block (32) are respectively threaded into the threads in opposite directions at both ends of the lead screw (34).

2. The blade polishing device according to claim 1, characterized in that: The polishing assembly includes two separate abrasive belt assemblies; The sanding belt assembly includes a sanding belt (41) and a drive wheel assembly. The sanding belt (41) is sleeved on the drive wheel assembly. The blade is positioned in the gap between the sanding belts (41) of the two sanding belt assemblies by a blade clamp (2). Among the sanding belts (41) of the two sanding belt assemblies, one sanding belt (41) is opposite to the blade basin surface to form a first polishing surface (411), and the other sanding belt (41) is opposite to the blade back surface to form a second polishing surface (412).

3. The blade polishing device according to claim 1, characterized in that: The blade clamp (2) is slidably mounted on the base (1). The blade is pushed to move by the blade basin pressing block (31) so that the back of the blade is squeezed to deform the second polished surface (412) and fits against the second polished surface (412).

4. The blade polishing device according to claim 1, characterized in that: The leaf back pressing block (32) is fixedly set on the base (1). The leaf is pushed close to the leaf back pressing block (32) by the leaf basin pressing block (31), so that the second polished surface (412) is in contact with the back of the leaf, while its back side is in contact with the leaf back contour groove (321) opened by the leaf back pressing block (32).

5. A blade polishing device according to claim 1 or 2, characterized in that: The drive wheel assembly includes at least one movable wheel (42) and at least one drive wheel (43). The movable wheel (42) is slidably mounted on the base (1) to allow the sanding belt (41) mounted on the movable wheel (42) to retract when subjected to external force, thus preventing the sanding belt (41) from breaking. The drive wheel (43) is mounted on the base (1) and is used to drive the sanding belt (41) to move. The base (1) is equipped with a position holding component, which generates an elastic force opposite to the direction of movement of the movable wheel (42) when the position of the movable wheel (42) changes, so as to continuously provide tension to the sanding belt (41).

6. The blade polishing device according to claim 5, characterized in that: The position holding assembly includes a fixing block (421) and a spring (422). The fixing block (421) is fixedly mounted on the base (1), and the two ends of the spring (422) are respectively connected to the fixing block (421) and the movable wheel (42).

7. The blade polishing device according to claim 1, characterized in that: The base (1) is provided with a slide rail (35). The leaf basin pressing block (31) and the leaf clamp (2) are slidably mounted on the slide rail (35), or, The leaf basin pressing block (31) and the leaf back pressing block (32) are slidably disposed on the slide rail (35).

8. A blade polishing device according to any one of claims 1, characterized in that: The width of the sand belt (41) is the same as the height of the blade profile.

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