Five-axis machining fixing tool for aero-engine ring precision casting

Abstract

The utility model discloses an aero-engine ring precision casting five-axis machining fixing tool which comprises a base, a centering clamp is arranged on the base, and a supporting table is arranged in the middle of the centering clamp. The centering clamp comprises a sliding rail arranged on the base, a centering screw rod is arranged in the sliding rail, and a first clamping block and a second clamping block which are in threaded connection with the centering screw rod are arranged above the sliding rail. The multi-axis drilling and reaming machine is convenient to operate, simple in structure and small in coverage area, can be used for five-axis equipment, can continuously finish drilling and reaming, chamfering, milling of inner and outer assembly grooves and machining of groove bottom surfaces in multiple directions in one piece of equipment after one-time clamping, and has the characteristic of high machining efficiency; in addition, the device has the characteristics of reasonable design and high practicability.

Description

Technical Field

[0001] The utility model relates to a fixing tool for processing parts, in particular to a fixing tool for processing five-axis precision casting rings of aviation engines. Background Art

[0002] Ring precision casting is one of the parts in aircraft engines. After the casting of the ring precision casting blank is completed, it needs to undergo a series of processing such as drilling and reaming, chamfering, milling of internal and external assembly grooves and groove bottom surfaces to ensure the size and position requirements. These processing procedures are all carried out in multi-axis processing equipment. Therefore, when performing the above processing on the precision casting blank, fixed tooling is an indispensable equipment.

[0003] For example, the patent with publication number CN220260166U discloses a fixture for machining reference holes of precision ring castings of aircraft engines, including a base, a support frame 1, a support frame 2, a clamping plate 1 and a clamping plate 2, wherein the clamping plates 1 and 2 are connected with a clamping drive device; it also includes a vertical arm, the top of the vertical arm is provided with a U-shaped groove, the rear end of the U-shaped groove is connected with an arm beam via a rotating shaft, the front end of the arm beam is provided with a pressure plate, the arm beam is provided with a hole groove, and the bottom of the U-shaped groove is provided with an internal threaded hole; in addition, it also includes a detachable T-plate, the front end of which is a front positioning plate, the length of the front positioning plate is consistent with the length of the empty area inside the precision ring casting, and the rear end is a rear positioning plate, the width of the rear positioning plate is consistent with the groove width of the U-shaped groove. This patent realizes the positioning and fixing of precision ring castings through the aforementioned fixture structure, and provides a basis for multi-axis processing of precision ring castings.

[0004] However, the above-mentioned fixing fixture is more troublesome to operate, and the fixing structure is complex and covers a large area. After fixing, it can only be processed by four-axis equipment. It is not possible to continuously complete the processes of drilling and reaming in multiple directions, chamfering, milling internal and external assembly grooves and groove bottom surfaces in one device after one clamping, resulting in low processing efficiency.

[0005] To this end, we have improved and upgraded the fixing tooling for aircraft engine ring precision castings. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a five-axis machining fixture for aero-engine ring precision casting. The utility model is easy to operate, simple in structure, and small in coverage area. It can be used for five-axis equipment and can continuously complete drilling, reaming, chamfering, milling of internal and external assembly grooves and groove bottom surface processing in multiple directions in one device after one clamping. It has the characteristics of high machining efficiency; in addition, it also has the characteristics of reasonable design and strong practicality.

[0007] The technical solution of this utility model:

[0008] A five-axis machining fixture for an aero-engine ring precision casting comprises a base, a centering clamp is arranged on the base, and a support platform is arranged in the middle of the centering clamp;

[0009] The centering clamp comprises a slide rail arranged on a base, a centering screw is arranged inside the slide rail, and a clamping block 1 and a clamping block 2 which are threadedly connected to the centering screw are arranged above the slide rail.

[0010] This solution arranges a centering clamp on the base and a support platform in the middle of the centering clamp. The entire fixed tooling structure is simple, easy to operate, and has no cover on the upper side. It can be used for five-axis equipment and can continuously complete drilling and reaming, chamfering, milling of internal and external assembly grooves and groove bottom surface processing in multiple directions in one device after one clamping, which greatly improves the processing efficiency.

[0011] Preferably, in the above-mentioned aircraft engine ring precision casting five-axis machining fixture, a chute is provided on one side of the support platform in the width direction. More preferably, the length of the chute is consistent with the distance between the outer facades of the two inclined plates at the bottom of the ring precision casting, and the slope of the chute is consistent with the slope of the inclined plate at the bottom of the ring precision casting.

[0012] This solution provides an inclined groove on the support platform. On the one hand, the inclined groove can match the inclined plate at the bottom of the ring precision casting, making the design more reasonable and easier to fix and install. At the same time, the ring precision casting is directly positioned through the inclined groove, which improves the limiting speed and accuracy, makes the operation more convenient, and is more practical.

[0013] Preferably, in the aforementioned five-axis machining fixture for aerospace engine ring precision casting, a groove is respectively provided on the inner sides of the clamping block 1 and the clamping block 2 facing each other.

[0014] In this solution, a groove is arranged on the clamping block, and the groove matches the side convex part at the bottom of the ring precision casting, so the design is more reasonable and more practical.

[0015] Preferably, in the aforementioned five-axis machining fixture for the aero-engine ring precision casting, support bosses are provided at the locations where both ends of the support platform in the length direction contact the ring precision casting, and the upper surface of the support bosses is higher than the upper surface of the support platform.

[0016] Preferably, in the aforementioned five-axis machining fixture for the precision casting of the aerospace engine ring, a fastening boss is respectively provided at both ends of the opposite inner sides of the clamping block one and the clamping block two.

[0017] This solution uses a smaller area to support and fix the ring precision casting by respectively arranging a supporting boss and a fastening boss on the supporting platform and the clamping block, thereby avoiding the problem of loose support and fastening of the ring precision casting due to uneven surface. The design is more reasonable and more practical.

[0018] Preferably, in the aforementioned five-axis machining fixture for the aero-engine ring precision casting, the surface of the fastening boss in contact with the ring precision casting is a rough surface.

[0019] In this solution, by setting the surface of the fastening boss to be a rough surface, the friction force with the ring precision casting is greater during fixation, and the fastening effect is better.

[0020] Beneficial effects of the utility model:

[0021] 1. The utility model arranges a centering clamp on the base and a support platform in the middle of the centering clamp. The entire fixed tooling structure is simple, easy to operate, and has no cover on the upper side. It can be used for five-axis equipment and can continuously complete drilling and reaming, chamfering, milling of internal and external assembly grooves and groove bottom surface processing in multiple directions in one device after one clamping, which greatly improves the processing efficiency.

[0022] 2. The utility model arranges an inclined groove on the support platform. On the one hand, the inclined groove can match the inclined pull plate at the bottom of the ring precision casting, making the design more reasonable and easier to fix and install. At the same time, the ring precision casting is directly positioned through the inclined groove, which improves the limiting speed and accuracy, makes the operation more convenient, and is more practical.

[0023] 3. The utility model has a more reasonable design and stronger practicality by arranging a groove on the clamping block, and the groove matches the side convex part at the bottom of the ring precision casting.

[0024] 4. The utility model provides supporting bosses and fastening bosses on the supporting platform and the clamping block respectively, and uses a smaller area to support and fix the ring precision casting, thereby avoiding the problem of loose support and fastening of the ring precision casting due to uneven surface. The design is more reasonable and more practical.

[0025] 5. The utility model sets the surface of the fastening boss as a rough surface, so that the friction between the ring casting and the fastening boss is greater during fixation, and the fastening effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0027] Attached Figure 2 It is a cross-sectional view of the utility model;

[0028] Attached Figure 3 This is a schematic diagram of the structure of the fixed ring precision casting of the utility model;

[0029] Attached Figure 4 It is a cross-sectional view of a ring precision casting;

[0030] Attached Figure 5 This is a plan view of a ring precision casting.

[0031] Explanation of the reference numerals: 1-base, 2-support platform, 3-slide rail, 4-centering screw, 5-clamping block one, 6-clamping block two, 7-bevel groove, 8-groove, 9-support boss, 10-fastening boss, 11-ring precision casting body, 12-ring precision casting inclined plate, 13-side protrusion of the ring precision casting. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the embodiments, but is not intended to be a basis for limiting the present invention.

[0033] Embodiments of the present utility model

[0034] A five-axis machining fixture for precision casting of an aero-engine ring, as shown in the attached Figure 1-2 As shown, it comprises a base 1, a centering clamp is provided on the base 1, and a support platform 2 is provided in the middle of the centering clamp;

[0035] The centering clamp comprises a slide rail 3 arranged on a base 1 , a centering screw 4 is arranged inside the slide rail 3 , and a clamping block 1 5 and a clamping block 2 6 threadedly connected to the centering screw 4 are arranged above the slide rail 3 .

[0036] The base 1 , the centering clamp and the support platform 2 of this embodiment are all made of metal.

[0037] When in use, first rotate the centering screw 4 to separate the clamping blocks 1 5 and 2 6 at both ends to both sides at the same time, and then Figure 4 and 5 The aircraft engine ring precision casting shown is placed between the clamping block 1 5 and the clamping block 2 6 and placed flat on the support table 2, and then the centering screw 4 is rotated in the opposite direction so that the clamping blocks 1 5 and the clamping blocks 2 6 at both ends are simultaneously moved toward the middle to squeeze the two sides of the ring precision casting body 11, as shown in FIG. Figure 3 As shown, just fix the ring precision casting.

[0038] Further implementation, for example, Figure 1-2 As shown, a slanted groove 7 is provided on one side of the support platform 2 in the width direction, the length of the slanted groove 7 is consistent with the distance between the outer facades of the two inclined plates at the bottom of the ring precision casting, and the slope of the slanted groove 7 is consistent with the slope of the inclined plates at the bottom of the ring precision casting.

[0039] The top of the inclined groove 7 of this embodiment is located in the middle position of the width direction of the support platform 2. When installing the ring precision casting, the inclined plate 12 of the ring precision casting is placed on one side of the inclined groove 7, so that the ring precision casting can be placed flat. When installing and removing the ring precision casting, there is no need to separate the clamping block 1 5 and the clamping block 2 6 to the maximum distance. After slightly loosening them, the ring precision casting can be placed in or taken out by tilting it at a certain angle, which is more convenient to operate.

[0040] Further implementation, for example, Figure 1-2As shown, a groove 8 is respectively provided on the inner sides of the clamping block 1 5 and the clamping block 2 6 which are opposite to each other.

[0041] The depth of the groove 8 in this embodiment is deeper than the protruding distance of the side protrusion 13 of the ring precision casting, so as to facilitate the placement of the side protrusion 13 of the ring precision casting during installation.

[0042] Further implementation, for example, Figure 1-2 As shown, support bosses 9 are provided at the locations where the two ends of the support platform 2 in the length direction contact with the ring precision casting, and the upper surface of the support bosses 9 is higher than the upper surface of the support platform 2 .

[0043] The upper surface of the support boss 9 of this embodiment is 2-5 mm higher than the upper surface of the support platform 2, so as to avoid the problem of unstable support caused by the uneven surface of the ring precision casting.

[0044] Further implementation, for example, Figure 1-2 As shown, a fastening boss 10 is respectively provided at two ends of the inner sides of the clamping block 1 5 and the clamping block 2 6 .

[0045] The side surfaces of the clamping block 1 5 and the clamping block 2 6 of this embodiment protrude 2-5 mm, so as to avoid the problem of loose fixation caused by the uneven surface of the ring precision casting.

[0046] Further implementation, for example, Figure 1-2 As shown, the surface of the fastening boss 10 in contact with the ring precision casting is a rough surface.

[0047] The rough surface of the fastening boss 10 of this embodiment is made on its surface in a conventional manner. When fixing the ring precision casting, the rough surface can provide greater friction, thereby improving the fastening effect and further preventing the ring precision casting from being dislocated during processing.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and the utility model of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A five-axis machining fixture for an aircraft engine ring precision casting, characterized in that: It comprises a base (1), a centering clamp is provided on the base (1), and a support platform (2) is provided in the middle of the centering clamp; The centering clamp comprises a slide rail (3) arranged on a base (1), a centering screw (4) is arranged inside the slide rail (3), and a clamping block 1 (5) and a clamping block 2 (6) threadedly connected to the centering screw (4) are arranged above the slide rail (3).

2. The five-axis machining fixture for aero-engine ring precision casting according to claim 1 is characterized in that: An inclined groove (7) is provided on one side of the support platform (2) in the width direction.

3. The five-axis machining fixture for aero-engine ring precision casting according to claim 2 is characterized in that: The length of the inclined groove (7) is consistent with the distance between the outer facades of the two inclined plates at the bottom of the ring precision casting, and the slope of the inclined groove (7) is consistent with the slope of the inclined plates at the bottom of the ring precision casting.

4. The five-axis machining fixture for aero-engine ring precision casting according to claim 1 is characterized in that: A groove (8) is provided on the opposite inner sides of the clamping block 1 (5) and the clamping block 2 (6).

5. The five-axis machining fixture for aero-engine ring precision casting according to claim 1 is characterized in that: Support bosses (9) are provided at the locations where the two ends of the support platform (2) in the length direction contact the ring precision casting, and the upper surface of the support bosses (9) is higher than the upper surface of the support platform (2).

6. The five-axis machining fixture for aero-engine ring precision casting according to claim 1 is characterized in that: A fastening boss (10) is provided at each of the two opposite inner ends of the clamping block 1 (5) and the clamping block 2 (6).

7. The five-axis machining fixture for aero-engine ring precision casting according to claim 6 is characterized in that: The surface of the fastening boss (10) in contact with the ring precision casting is a rough surface.

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