Grinding machining device

Abstract

The invention relates to the technical field of aero-engine turbine blade machining, and particularly discloses a grinding device which comprises a mounting seat, and a positioning assembly, a bottom pressing assembly, a rear end supporting part and a top pressing assembly which are detachably connected with the mounting seat, a part is clamped and fixed through the positioning assembly, the bottom pressing assembly and the rear end supporting part, then a first machining face and a second machining face of the part are machined, and the part is clamped and fixed through the positioning assembly, the rear end supporting part and the top pressing assembly, and then a third machining face of the part is machined. The special-shaped blade part machining device aims at solving the problems that an existing special-shaped blade part is large in clamping difficulty and large in machining face number, and clamping and fixing are difficult to achieve through one machining device.

Description

Technical Field

[0001] The invention relates to the technical field of machining turbine blades of aircraft engines, and in particular to a grinding device. Background Art

[0002] Blade grinding is an important process for blade arc processing, which is crucial to ensure the stability and accuracy of parts.

[0003] In the early stage, slow grinding tooling was carried out in a one-grind-one-tooling manner. There were many steps to change tooling when processing different positions, and the parts needed to be clamped and repositioned. Repeated alignment was troublesome, time-consuming, and efficiency could not be guaranteed.

[0004] According to the requirements of the blade design drawing, the slow grinding process, slow grinding tooling and measuring tools must be designed first. In particular, the tooling used for processing is closely related to the processing technology. The clamping stability of the processing device and the accuracy of the clamping positioning directly affect the processing effect of the grinding process. Figure 1 As shown in the figure, due to the unique shape design and streamlined curved surface of the FA blade parts, it is difficult to find a reference for the tooling design. During processing, it is necessary to grind the three parts at a, b and b in the figure, a total of six surfaces, and b is the side surface; a is defined as the first processing surface, b is the second processing surface, and c is the third processing surface; the horizontal heights of the two processing surfaces at a are inconsistent, the vertical widths of the two processing surfaces at b are inconsistent, the horizontal heights of the two processing surfaces at c are inconsistent, and the left processing surface at c has a mounting hole, and the side wall of the right processing surface is an S-shaped curved surface; the part has many processing surfaces and an asymmetric structure, which makes it difficult to position and clamp the entire part. Therefore, how to design a processing device to achieve stable clamping of blade parts and realize grinding processing at multiple different positions is a problem that needs to be solved urgently. Summary of the invention

[0005] In view of the deficiencies in the prior art, the technical problem solved by the present invention is to provide a grinding processing device to solve the problem that the existing special-shaped blade parts are difficult to clamp, have many processing surfaces, and are difficult to clamp and fix through a set of processing devices.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is: a grinding processing device, including a mounting seat, and a positioning assembly, a bottom clamping assembly, a rear end support part and a top clamping assembly detachably connected to the mounting seat; the first processing surface and the second processing surface of the part are processed after the part is clamped and fixed by the positioning assembly, the bottom clamping assembly and the rear end support part, and the third processing surface of the part is processed after the part is clamped and fixed by the positioning assembly, the rear end support part and the top clamping assembly;

[0007] The positioning assembly includes a positioning pin and a positioning reference part. The positioning pin is embedded in the mounting hole of the part and its height does not exceed the height of the mounting hole. The positioning reference part is in conflict with the inner wall of the right curved surface of the part; the bottom clamping assembly includes a left pressure plate and a right pressure plate. The left pressure plate and the right pressure plate are respectively used to clamp the third processing surfaces on the left and right sides of the part; the rear end support part is used to clamp the rear end inclined surface of the part, and the top clamping assembly includes a bracket and an upper pressure plate. The bracket is arranged across the top of the part, and the upper pressure plate is detachably connected to the bracket and is used to clamp the first processing surface and the second processing surface of the part.

[0008] The beneficial effects of this solution are: this solution uses the positioning assembly and the rear support assembly to accurately position and limit the parts, and then cooperates with the bottom clamping assembly or the top clamping assembly to achieve positioning and clamping of different processing surfaces. Thus, a set of processing devices can clamp different parts of the parts and realize the processing of six surfaces at different positions of the parts; and when clamping different processing surfaces, there is no need to remove the parts or repeat positioning, so as to ensure the accuracy of part clamping.

[0009] Furthermore, the mounting seat includes a base and a mounting seat, the two ends of the base are arc-shaped, and the two circular sides are provided with grooves; the base is also provided with a plurality of penetrating mounting holes. The machine tool can be clamped through the grooves on the sides, and the machine tool can be bolted through the mounting holes, which is suitable for different connection methods of different machine tools, making the device more applicable.

[0010] Furthermore, the mounting seat is stepped, and the mounting seat surface is provided with an arc-shaped convex strip that matches the shape of the lower end of the third processing surface on the right side of the part. The stepped mounting seat leaves space for the feed route of the tool during grinding to prevent the mounting seat from being ground.

[0011] Furthermore, the mounting seat and the base are split, which is convenient for transportation and reduces the weight of a single processed part.

[0012] Furthermore, the upper end of the positioning reference part is a spherical surface or a curved surface that fits the inner curved surface of the part. When a spherical surface is used, the contact area between the spherical surface and the inner curved surface of the part is small, which is convenient for positioning surfaces with different curvatures, and the spherical surface processing is simpler; when a curved surface is used, the contact area is increased by the fitting curved surface, so that the part can be better limited.

[0013] Furthermore, the rear support part includes an inclined baffle, the inclined surface of which abuts against the rear inclined surface of the part. The wedge-shaped baffle can not only limit the part but also support the part, with a large supporting area, which is convenient for stable clamping.

[0014] Furthermore, the support comprises a support rod and a connecting plate, wherein two support rods are provided, and two ends of the connecting plate are detachably connected to the upper end of the support rod. Through the detachable split structure, it is convenient to replace different damaged components.

[0015] Furthermore, the upper pressing plate is a concave shape composed of a horizontal portion and a vertical portion, the two vertical portions are of different heights, and the inner sides of the two vertical portions are inclined surfaces that fit with the second processing surface of the part. The fitting inclined surfaces make the clamping of the upper pressing plate more stable, ensuring that the part is not easily offset when processing the third processing surface.

[0016] Furthermore, the two ends of the connecting plate are lateral openings, and the openings at the two ends are located on different sides. After one end of the connecting plate is removed, the other end can be removed from the supporting rod by rotating the connecting plate.

[0017] Furthermore, the connecting rod is provided with a first guide hole, the upper pressing plate is provided with a second guide hole, and the guide rod passes through the first guide hole and the second guide hole and is slidably connected with the upper pressing plate. By providing the guide rod, it plays a guiding role when the upper pressing plate is pressed downward by adjusting the bolt, so as to avoid deflection of the upper pressing plate when it moves downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the blade parts to be processed.

[0019] Figure 2 It is a left-facing stereoscopic view of the processing device.

[0020] Figure 3 A top view of the processing device.

[0021] Figure 4 This is the front view of the processing device.

[0022] Figure 5 This is a schematic diagram of the processing device after clamping parts.

[0023] Figure 6 This is a schematic diagram of clamping for machining the first machining surface and the second machining surface.

[0024] Figure 7 This is a schematic diagram of the clamping for machining the third machining surface.

[0025] Figure 8 It is a schematic diagram of the structure of the left pressure plate and the right pressure plate. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The figure marks in the drawings of the specification include: mounting seat 1, base 11, groove 111, mounting hole 112, support seat 12, positioning pin 13, positioning reference member 14, arc-shaped convex strip 15, left pressure plate 2, right pressure plate 21, inclined surface 22, limiting flange 23, rear end support part 3, support rod 4, connecting plate 41, upper pressure plate 42, guide rod 43, part 5.

[0028] Example 1 This is as attached Figure 2 As shown: A grinding device includes a mounting seat 1, a positioning assembly bolted to the mounting seat 1, a bottom clamping assembly, a rear end support portion 3 and a top clamping assembly; Figure 6 As shown in the figure, the first processing surface and the second processing surface of the part 5 are processed after the part 5 is clamped and fixed by the positioning component, the bottom clamping component, and the rear end support part 3; Figure 7 As shown, the part 5 is clamped and fixed by the positioning assembly, the rear end support part 3, and the top clamping assembly, and then the third processing surface of the part 5 is processed.

[0029] The positioning assembly includes a positioning pin 13 and a positioning reference part 14. The positioning pin 13 is embedded in the mounting hole 112 of the part 5 and its height does not exceed the height of the mounting hole 112, so as not to affect the processing and clamping and fixing of the third processing surface. The upper end of the positioning reference part 14 is a spherical surface and contacts the inner wall of the right curved surface of the part 5. There are two positioning reference parts 14. The positioning reference parts 14 are made of a high-hardness metal material with a hardness of 55-65. Since the blade part 5 is made of a high-hardness material, the positioning reference part 14 is made of a high-hardness material, so that it is not easy to wear during use, the accuracy of positioning is guaranteed, and the service life is extended.

[0030] The bottom clamping assembly includes a left clamping plate 2 and a right clamping plate 21, and the left clamping plate 2 and the right clamping plate 21 are used to clamp the third processing surfaces on the left and right sides of the part 5 respectively; Figure 8 As shown, the upper ends of the left and right pressure plates 2 and 21 are used for clamping, and the upper ends are inclined surfaces 22, and the lower end surfaces are provided with limiting flanges 23; the upper end inclined surface 22 can facilitate the clamping of the pressure plate and is not easy to interfere with the curved surface of the side edge of the blade, and can be used in smaller clamping spaces; the lower end limiting flange 23 is provided, and after the pressure plate is clamped, the limiting flange 23 contacts the side wall of the lower end of the third processing surface of the part 5, so that when the part 5 has a tendency to deviate left and right during processing, it is limited by the limiting flange 23, so that it is not easy to have relative displacement, thereby ensuring the stability of the clamping; the left pressure plate 2 is T-shaped, and the end face is curved with the third processing surface of the part 5. The arc surface with a curved arc is set as a T-shaped end so that the clamping surface in contact with the part 5 is larger, which is convenient for stable clamping; there are two right pressure plates 21. Since the length of the third processing surface on the right side of the part 5 is greater than the third processing surface on the left side of the part 5, the lower end of the part 5 is clamped and stabilized by setting two right pressure plates 21, so that the part 5 is not easy to warp when the first or second processing surface is processed to the end, and two right pressure plates 21 are used for clamping to form two stable clamping points, so that the clamping is more stable; if only one right pressure block is used, the arc surface of the processing end is larger, the volume of the pressure plate is larger, the difficulty of processing the pressure plate is increased, and it is not easy to adjust the position.

[0031] The rear support part 3 is used to tighten the rear end inclined surface of the part 5. The rear support part includes a bottom plate and an inclined baffle fixed on the bottom plate. The bottom plate and the inclined baffle are integrally formed. Two inclined baffles are arranged in parallel. The inclined surface 22 of the inclined baffle abuts against the rear end inclined surface of the part 5. The bottom plate is fixedly connected with the support seat 12 by bolts.

[0032] The top clamping assembly includes a bracket and an upper pressing plate 42. The bracket is arranged longitudinally above the part 5. The upper pressing plate 42 is bolted to the bracket and is used to clamp the first processing surface and the second processing surface of the part 5. The bracket can be an inverted concave-shaped integrated bracket or a split bracket. The split bracket includes a support rod 4 and a connecting plate 41. The support rod 4 is provided with two notches in the middle. The wrench tightens the support rod 4 through the notches. The two ends of the connecting plate 41 are respectively threadedly connected to the upper end of the support rod 4. The two ends of the connecting plate 41 are lateral openings, and the openings at the two ends are located on different sides; when one end of the connecting plate 41 is removed, the other end can be removed from the support rod 4 by rotating the connecting plate 41. The upper pressing plate 42 is a concave shape composed of a horizontal part and a vertical part. The heights of the two vertical parts are unequal and match the positions of the two first processing surfaces of the part 5, and the inner sides of the two vertical parts are inclined surfaces that fit the second processing surface of the part 5.

[0033] The mounting seat 1 includes a split base 11 and a mounting seat 1. Both ends of the base 11 are arc-shaped, and grooves 111 are provided on the two circular sides; the base 11 is also provided with a plurality of penetrating mounting holes 112, which can be clamped with the machine tool through the side grooves 111, and can be connected with the machine tool bolts through the mounting holes 112, which is suitable for different connection methods of different machine tools, making the device more applicable. The mounting seat 1 is stepped, and the right side surface of the mounting seat 1 is provided with an arc-shaped convex strip 15 that fits the shape of the lower end of the third processing surface on the right side of the part 5. Through the stepped mounting seat 1, space is reserved for the feed route of the tool during grinding to prevent the mounting seat 1 from being ground. The arc-shaped convex strip 15 is used to fill the different horizontal heights on both sides of the lower end of the part 5, which is convenient for subsequent stable clamping. The arc-shaped convex strip 15 is integrally formed with the mounting seat 1, and the positioning reference part 14 is installed on the inner side of the arc-shaped convex strip 15.

[0034] The similarities between Example 2 and Example 1 are not repeated here. The difference is that the mounting base 1 adopts an integrated base 11 and mounting base 1, and the integrated type reduces the number of mounting connectors and the number of steps. The upper end of the positioning reference member 14 is an arc surface that fits the inner curved surface of the part 5. The contact area is increased by the fitting arc surface, so that the part 5 can be better limited. The rear support part includes a vertical plate and a support column fixed to the bottom plate and arranged in the longitudinal direction. Two support columns are arranged in parallel, and the end of the support column in contact with the part 5 is an inclined surface 22.

[0035] The connecting rod is provided with a first guide hole, the upper pressing plate 42 is provided with a second guide hole, and the guide rod passes through the first guide hole and the second guide hole and is slidably connected with the upper pressing plate 42. By providing the guide rod, it plays a guiding role when the upper pressing plate 42 is pressed down by adjusting the bolt, so as to prevent the upper pressing plate 42 from deflecting when it moves down.

[0036] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A grinding device, characterized in that: It includes a mounting seat, and a positioning assembly, a bottom clamping assembly, a rear end support part and a top clamping assembly detachably connected to the mounting seat; the first processing surface and the second processing surface of the part are processed after the part is clamped and fixed by the positioning assembly, the bottom clamping assembly and the rear end support part, and the third processing surface of the part is processed after the part is clamped and fixed by the positioning assembly, the rear end support part and the top clamping assembly; The positioning assembly includes a positioning pin and a positioning reference part. The positioning pin is embedded in the mounting hole of the part and its height does not exceed the height of the mounting hole. The positioning reference part is in conflict with the inner wall of the right curved surface of the part; the bottom clamping assembly includes a left pressure plate and a right pressure plate. The left pressure plate and the right pressure plate are respectively used to clamp the third processing surfaces on the left and right sides of the part; the rear end support part is used to clamp the rear end inclined surface of the part, and the top clamping assembly includes a bracket and an upper pressure plate. The bracket is arranged across the top of the part, and the upper pressure plate is detachably connected to the bracket and is used to clamp the first processing surface and the second processing surface of the part.

2. A grinding device according to claim 1, characterized in that: The mounting seat comprises a base and a mounting seat, the two ends of the base are arc-shaped, and grooves are formed on the two circular side surfaces; the base is also provided with a plurality of penetrating mounting holes.

3. A grinding device according to claim 2, characterized in that: The mounting seat is in a step shape, and a surface of the mounting seat is provided with an arc-shaped convex strip that fits the shape of the lower end of the third processing surface on the right side of the part.

4. A grinding device according to claim 2, characterized in that: The mounting seat and the base are split.

5. A grinding device according to claim 1, characterized in that: The upper end of the positioning reference member is a spherical surface or an arc surface that fits the inner curved surface of the part.

6. A grinding device according to claim 1, characterized in that: The rear supporting part comprises an inclined baffle, and the inclined surface of the inclined baffle abuts against the inclined surface of the rear end of the part.

7. A grinding device according to claim 1, characterized in that: The bracket comprises a support rod and a connecting plate. Two support rods are provided, and two ends of the connecting plate are respectively detachably connected to the upper ends of the support rods.

8. The grinding device according to claim 1, characterized in that: The upper pressing plate is in a concave shape consisting of a horizontal portion and a vertical portion, the two vertical portions have different heights, and the inner sides of the two vertical portions are inclined surfaces that fit the second processing surface of the part.

9. A grinding device according to claim 7, characterized in that: The two ends of the connecting plate are of the side opening type, and the openings at the two ends are located on different sides.

10. A grinding device according to claim 7, characterized in that: The connecting rod is provided with a first guide hole, the upper pressing plate is provided with a second guide hole, and the guide rod passes through the first guide hole and the second guide hole and is slidably connected with the upper pressing plate.

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