Blade horizontal machining fixture

Abstract

The utility model discloses a blade horizontal machining fixture which comprises a supporting seat arranged below a blade, a clamping device and a clamping device. The top of the supporting seat is provided with a curved surface matched with the lower side face of the blade. The blade root pressing assembly is used for vertically pressing the blade root; the blade surface positioning assembly is used for performing contact positioning on the upper side surface of the blade; and the blade edge positioning assembly is used for carrying out transverse point contact positioning on the blade edge. Through the innovative design of the curved surface support and the multi-directional positioning assembly, the problems that a traditional clamp is insufficient in positioning precision and high in surface damage risk are solved, and the clamp is particularly suitable for machining scenes of high-precision parts such as superplastic forming blades and the like and has high precision, low damage and high adaptability.

Description

Technical Field

[0001] The utility model relates to a blade horizontal processing fixture, belonging to the technical field of mechanical fixtures. Background Technique

[0002] With the development of aero-engines and gas turbines towards high thrust-to-weight ratio and high efficiency, as the core aerodynamic component, the manufacturing precision and performance requirements of blades are becoming increasingly stringent. Traditional blade processing mostly adopts the process of forging blanks and then mechanical forming, which requires multi-process processing of parts such as blade profiles, blade roots, inlet / outlet sides, etc., with a complex process and high cost.

[0003] In recent years, due to advantages such as the ability to form complex blade profiles in one step and reduce material waste, the superplastic forming technology has gradually become the mainstream process for blade manufacturing. However, after superplastic forming, the blades still need to be processed with high precision on key mating surfaces such as blade roots, inlet sides, and outlet sides to ensure assembly reliability and aerodynamic performance, but different from traditional technologies, the blade profiles do not need to be processed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a blade horizontal processing fixture to adapt to the processing of superplastic formed blades.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A blade horizontal processing fixture includes: a support seat arranged below the blade, and a curved surface matching the lower side surface of the blade is provided at the top of the support seat;

[0007] A blade root pressing component for vertically pressing the blade root;

[0008] A blade surface positioning component for positioning by contacting the upper side surface of the blade;

[0009] A blade edge positioning component for positioning by laterally point-contacting the blade edge.

[0010] Optionally, the blade root pressing component includes a first support member arranged below the blade root and a downward pressing component for positioning above the blade root. The downward pressing component includes a first positioning rod, and a limit bolt is provided at the top of the first positioning rod; a pressing block is sleeved on the first positioning rod, the pressing block is located below the limit bolt, and a second support member is provided below the side of the pressing block away from the blade root.

[0011] Optionally, a first step is provided on the upper part of the first positioning rod, and a first spring is provided between the lower part of the pressing block and the upper part of the first step.

[0012] Optionally, the pressing block is sleeved on the first positioning rod through a strip-shaped hole.

[0013] Alternatively, the first support member and / or the second support member includes a second positioning rod, and a pressing head is provided on the second positioning rod. The pressing head is movably provided on the second positioning rod through an elastic member.

[0014] Alternatively, the leaf positioning assembly includes a third positioning rod, and a limiting block is provided at the top of the third positioning rod; a support rod is penetrated through the third positioning rod, the support rod is located below the limiting block, and a movable pressing member is connected to the support rod.

[0015] Alternatively, the pressing member includes at least two pressing plates, first contact blocks are provided on both sides of the lower end of each pressing plate, the pressing plates are connected by a connecting rod, and the connecting rod is rotatably connected to the support rod through a rotating member.

[0016] Alternatively, the support rod is rotatably provided on the third positioning rod, and a thrust ball bearing is provided between the upper part of the support rod and the lower part of the limiting block.

[0017] Alternatively, a second step is provided on the upper part of the third positioning rod, and a second spring is provided between the lower part of the support rod and the upper part of the second step.

[0018] Alternatively, the leaf edge positioning assembly includes a fourth positioning rod, a mounting member is provided at the upper end of the fourth positioning rod, a positioning bolt is provided on the mounting member, and a second contact block is connected to the end of the positioning bolt.

[0019] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0020] A blade horizontal processing fixture provided by the present utility model solves the problems of insufficient positioning accuracy and high risk of surface damage of traditional fixtures through the innovative design of a curved surface support + multi-directional positioning assembly, and is particularly suitable for the processing scenarios of high-precision parts such as superplastic forming blades, and has high precision, low damage, and strong adaptability. Description of the Drawings

[0021] Figure 1 is a schematic three-dimensional structure of the present utility model Figure 1 .

[0022] Figure 2 is a schematic three-dimensional structure of the present utility model Figure 2 .

[0023] Markings in the figure: 1 - support base, 2 - blade root pressing assembly, 21 - first support member, 211 - second positioning rod, 212 - pressing head, 22 - downward pressing assembly, 221 - first positioning rod, 222 - limit bolt, 223 - pressing block, 224 - first spring, 23 - second support member, 3 - blade surface positioning assembly, 31 - third positioning rod, 32 - limit block, 33 - support rod, 34 - pressing plate, 35 - first contact block, 36 - connecting rod, 37 - rotating member, 38 - thrust ball bearing, 39 - second spring, 4 - blade edge positioning assembly, 41 - fourth positioning rod, 42 - mounting member, 43 - positioning bolt, 44 - second contact block. Detailed implementation mode

[0024] The following will describe the present utility model in detail with reference to the accompanying drawings.

[0025] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] A blade horizontal processing fixture, as Figure 1 、 2 shown, includes: a support base 1 provided below the blade, and a curved surface matching the lower side surface of the blade is provided at the top of the support base 1;

[0027] a blade root pressing assembly 2 for vertically pressing the blade root;

[0028] a blade surface positioning assembly 3 for contacting and positioning the upper side surface of the blade;

[0029] a blade edge positioning assembly 4 for laterally point - contacting and positioning the blade edge.

[0030] Among them, the support base 1 is located below the blade, providing basic support; the gap between the blade and the fixture is eliminated by the curved surface fitting to ensure the stability in the vertical direction. The blade root pressing assembly 2 fixes the blade root in a vertical pressing manner to prevent the blade root from shifting during processing and ensure the processing accuracy of the key part. The blade surface positioning assembly 3 contacts the upper side surface of the blade to achieve two - way up - and - down constraint, restricting the degree of freedom of the blade in the vertical direction and avoiding the deviation caused by processing vibration. The blade edge positioning assembly 4 positions the blade edge through lateral point - contact without pressing, precisely controlling the position of the blade in the horizontal direction, reducing the friction area with the blade surface, avoiding scratches or micro - cracks, reducing the contact area to protect the surface quality, and preventing displacement during the milling process. The combination of the curved surface fitting of the support base 1 and the point - contact of the blade edge not only ensures the overall stability but also avoids deformation caused by over - constraint; through the synergistic effect of the blade surface positioning assembly 3 and the blade root pressing assembly 2, six - degree - of - freedom limitation is achieved to ensure the consistency of the processing reference.

[0031] As another specific embodiment, the blade root pressing assembly 2 includes a first support member 21 disposed below the blade root and a downward pressing assembly 22 for positioning above the blade root. The downward pressing assembly 22 includes a first positioning rod 221, and a limit bolt 222 is provided at the top of the first positioning rod 221; a pressing block 223 is sleeved on the first positioning rod 221, the pressing block 223 is located below the limit bolt 222, and a second support member 23 is provided below the side of the pressing block 223 away from the blade root. The first support member 21 provides basic support below the blade root to prevent sinking; in the downward pressing assembly 22, the height of the pressing block 223 is adjusted by the limit bolt 222 at the top of the first positioning rod 221 to adapt to different blade root thicknesses; the pressing block 223 and the second support member 23 form a lever-type pressing structure to ensure uniform force on the upper part of the blade root, form a rigid support chain, and avoid eccentric load or inclination during pressing. Among them, the blade root pressing assembly 2 includes two groups, which are respectively disposed on both sides of the blade root. The two pressing assemblies are symmetrically distributed on both sides of the blade root to form a two-way balanced pressure application, avoid blade skew or deformation caused by unilateral force, and at the same time improve the pressing stability, especially suitable for the processing scenarios of asymmetric or special-shaped blade roots.

[0032] As another specific embodiment, a first step is provided on the upper part of the first positioning rod 221, and a first spring 224 is provided between the lower part of the pressing block 223 and the upper part of the first step. The first spring 224 between the step on the upper part of the first positioning rod 221 and the pressing block 223 forms an elastic buffer system, which can not only adaptively adjust the pressing force through the spring to compensate for the blade root thickness tolerance, but also absorb the processing vibration and reduce the damage to the blade root surface caused by rigid impact.

[0033] As another specific embodiment, the pressing block 223 is sleeved on the first positioning rod 221 through a strip-shaped hole. Allowing the pressing block 223 to horizontally fine-tune its position along the rod body to adapt to different-width blade roots, enhancing the flexibility of the fixture; the gap of the strip-shaped hole can also relieve the assembly error and simplify the debugging process.

[0034] As another specific embodiment, the first support member 21 and / or the second support member 23 includes a second positioning rod 211, a tightening head 212 is provided on the second positioning rod 211, and the tightening head 212 is movably disposed on the second positioning rod 211 through an elastic member up and down. The tightening head 212 on the second positioning rod 211 realizes up and down floating through the elastic member, automatically compensates for local unevenness when fitting the blade root surface, ensures uniform distribution of the pressing force, prevents deformation or surface indentation caused by local overpressure, and improves the consistency of processing quality. Among them, the upper end of the tightening head 212 is an arc surface to avoid scratching the blade root surface with sharp edges and corners.

[0035] As another specific embodiment, the leaf surface positioning assembly 3 includes a third positioning rod 31, and a limiting block 32 is provided at the top of the third positioning rod 31; a support rod 33 is penetrated through the third positioning rod 31, the support rod 33 is located below the limiting block 32, and a movable pressing member is connected to the support rod 33. The limiting block 32 at the top of the third positioning rod 31 provides rigid vertical limitation to restrict the height position of the support rod 33; the support rod 33 connects the pressing member to the positioning rod, and then uses the pressing member to press the leaf blade.

[0036] As another specific embodiment, the pressing member includes at least two pressing plates 34, first contact blocks 35 are provided on both sides of the lower end of each pressing plate 34, the pressing plates 34 are connected by a connecting rod 36, and the connecting rod 36 is rotatably connected to the support rod 33 through a rotating member 37. The pressing plates 34 are connected by the connecting rod 36 and the rotating member 37, so that multiple pressing plates 34 can be opened and closed synchronously to adapt to the local curvature change of the upper surface of the leaf blade; the first contact blocks 35 on both sides of the lower end of the pressing plates 34 adopt a point contact design, which reduces the friction area with the leaf blade, avoids surface scratches, enhances the surface fitting ability, and evenly presses at multiple points, taking into account both positioning stability and surface protection.

[0037] As another specific embodiment, the support rod 33 is rotatably arranged on the third positioning rod 31, and a thrust ball bearing 38 is provided between the upper part of the support rod 33 and the lower part of the limiting block 32. The support rod 33 is connected to the limiting block 32 through the thrust ball bearing 38, which converts the traditional sliding friction into rolling friction, greatly reduces the rotation resistance of the support rod 33, and enables the pressing member to freely fine-tune the angle along with the surface shape of the leaf blade.

[0038] As another specific embodiment, a second step is provided on the upper part of the third positioning rod 31, and a second spring 39 is provided between the lower part of the support rod 33 and the upper part of the second step. The second step on the upper part of the third positioning rod 31 provides a lower limit for the support rod 33, and together with the second spring 39 below the support rod 33, an elastic support structure is formed, which can provide support through elastic deformation.

[0039] As another specific embodiment, the leaf margin positioning assembly 4 includes a fourth positioning rod 41, a mounting member 42 is provided at the upper end of the fourth positioning rod 41, a positioning bolt 43 is provided on the mounting member 42, and a second contact block 44 is connected to the end of the positioning bolt 43. The mounting member 42 at the top of the fourth positioning rod 41 is connected to the second contact block 44 through the positioning bolt 43 to form an adjustable point contact positioning system: the positioning bolt 43 can be screwed in / out manually or with a tool to flexibly adjust the horizontal position of the second contact block 44 to accurately adapt to different leaf margin contours; the second contact block 44 presses against the leaf margin in a point contact manner, which not only reduces the contact area to avoid scratching the surface, but also ensures the positioning stability through local high stiffness.

[0040] Further, when the spatial layout needs to be compacted, the third positioning rod 31 and the fourth positioning rod 41 can be combined into the same rod, and the support rod 33, the pressing plate 34, the mounting member 42, the positioning bolt 43 and the contact block are simultaneously arranged on the rod. In addition, a plurality of positioning bolts 43 can be arranged on one mounting member 42 to achieve multi-point contact.

[0041] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. The present invention extends to any new feature or any new combination disclosed in this specification, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the detailed technical features not disclosed in this embodiment, such as the specific structure, are all prior art, and those skilled in the art can obtain them from the prior art; the connection method can be a fixed connection, a detachable connection, or integrated; it can be a fixed connection, a movable connection, or a hinge connection, and can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific manner of the above terms in the embodiments of the present invention can be understood according to specific circumstances, and the present disclosure embodiments do not make specific limitations thereto.

Claims

1. A blade horizontal processing fixture, characterized in that: include: A support seat (1) is arranged below the blade, wherein the top of the support seat (1) is provided with a curved surface matching the lower side of the blade; A blade root pressing assembly (2) for vertically pressing the blade root; A blade surface positioning assembly (3) for performing upper side contact positioning on the blade; A blade edge positioning assembly (4) is used for performing lateral point contact positioning on the blade edge.

2. The blade horizontal processing fixture according to claim 1, characterized in that: The blade root clamping assembly (2) comprises a first support member (21) arranged below the blade root and a downward pressing assembly (22) for positioning above the blade root, wherein the downward pressing assembly (22) comprises a first positioning rod (221), and a limiting bolt (222) is provided at the top of the first positioning rod (221); a pressing block (223) is passed through the first positioning rod (221), and the pressing block (223) is located below the limiting bolt (222); a second support member (23) is provided below the side of the pressing block (223) away from the blade root.

3. The blade horizontal processing fixture according to claim 2, characterized in that: A first step is provided on the upper portion of the first positioning rod (221), and a first spring (224) is provided between the lower portion of the pressing block (223) and the upper portion of the first step.

4. The blade horizontal processing fixture according to claim 2, characterized in that: The pressing block (223) is penetrated on the first positioning rod (221) through a strip-shaped hole.

5. The blade horizontal processing fixture according to claim 2, characterized in that: The first support member (21) and / or the second support member (23) comprises a second positioning rod (211), on which a tightening head (212) is provided, and the tightening head (212) is arranged on the second positioning rod (211) so as to be movable up and down via an elastic member.

6. The blade horizontal processing fixture according to claim 1, characterized in that: The blade surface positioning assembly (3) comprises a third positioning rod (31), a limiting block (32) is provided on the top of the third positioning rod (31); a supporting rod (33) is passed through the third positioning rod (31), the supporting rod (33) is located below the limiting block (32), and a movable pressing member is connected to the supporting rod (33).

7. The blade horizontal processing fixture according to claim 6, characterized in that: The clamping member comprises at least two clamping plates (34), and first contact blocks (35) are provided on both sides of the lower end of each clamping plate (34). The clamping plates (34) are connected by a connecting rod (36), and the connecting rod (36) is rotatably connected to the support rod (33) via a rotating member (37).

8. The blade horizontal processing fixture according to claim 6, characterized in that: The support rod (33) is rotatably arranged on the third positioning rod (31), and a thrust ball bearing (38) is arranged between the upper part of the support rod (33) and the lower part of the limiting block (32).

9. The blade horizontal processing fixture according to claim 6, characterized in that: A second step is provided on the upper portion of the third positioning rod (31), and a second spring (39) is provided between the lower portion of the support rod (33) and the upper portion of the second step.

10. The blade horizontal processing fixture according to claim 1, characterized in that: The blade edge positioning assembly (4) comprises a fourth positioning rod (41), the upper end of the fourth positioning rod (41) is provided with a mounting member (42), the mounting member (42) is provided with a positioning bolt (43), and the end of the positioning bolt (43) is connected to a second contact block (44).

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