A special jig for milling aviation parts

Abstract

The utility model provides a kind of jig special for aviation part milling machine processing, and the locating block on fixed component is provided with 4, and each locating block has arc slot bilaterally symmetrical, arc slot is matched with the arc surface of aviation part, realizes 8 clamping stations, compresses the time consumption of the clamping link of each workpiece, improves the processing capacity of milling machine;And the engagement of locating slide rail and aviation part bottom groove improves the accuracy of initial positioning, the arc slot on locating block makes aviation part even support and circumferential constraint, full-arc surface on arc-shaped pressure block head is uniformly distributed by the pressure exerted by lamination, avoid the position of aviation part to move in clamping or processing process, and then provide stable positioning accuracy for aviation part processing.

Description

Technical Field

[0001] This utility model relates to the field of aerospace parts processing technology, and more specifically, to a special fixture for milling aerospace parts. Background Technology

[0002] Aerospace components are primarily high-temperature alloy precision structural parts. These components typically have complex geometries, such as thin walls, deep cavities, and numerous curved surfaces, making positioning extremely time-consuming and requiring stringent precision. This also increases the likelihood of defective products during machining. Current traditional clamping methods require operating multiple clamping points individually, with manual adjustments and repeated measurements consuming significant non-cutting time. This results in long overall production times, hindering mass production and reducing efficiency. Therefore, a dedicated milling fixture for aerospace components is needed to address these issues. Utility Model Content

[0003] This invention addresses the problems of complex aerospace parts, time-consuming clamping and positioning processes with extremely high precision requirements, which affect machining quality; and the fact that clamping each part before machining requires point-by-point operation, severely restricting the efficiency of mass production.

[0004] This utility model provides a special fixture for milling aerospace parts, comprising: a support plate, a through hole, a fixing component, a positioning block, an arc groove, a pressure plate component, a fixing bolt, and a fixing bolt. The support plate is a cuboid structure with a through hole. A fixing component is fixedly installed on the upper surface of the support plate, and a positioning block is fixedly installed on the upper surface of the fixing component. Arc grooves are symmetrically arranged on both sides of the positioning block. The pressure plate component is movably connected to the fixing component through the fixing bolt.

[0005] Furthermore, the support plate is provided with four through holes, the diameter of which is larger than the diameter of the fixing bolts, so that the support plate can be fixedly installed on the machining table of the milling machine by the fixing bolts.

[0006] Furthermore, the fixing component includes: a fixing block, a sliding groove, a threaded hole, a clearance groove, and a positioning slide rail; the fixing block is fixedly installed on the upper surface of the support plate by welding. The fixing block has a cuboid structure. Two sliding grooves are symmetrically arranged on both sides of the fixing block. Four threaded holes are arranged on each side of the fixing block. The threaded holes cooperate with the fixing bolts. Three clearance grooves are arranged on the upper surface of the fixing block. A positioning slide rail is arranged on the protrusion formed by the fixing block and the clearance groove. The positioning slide rail cooperates with the bottom groove of the workpiece for fixation.

[0007] Furthermore, the positioning block is provided with a total of 4, which are fixedly installed on the boss formed by the fixing block and the clearance groove by welding. Two arc-shaped grooves are provided on both sides of the positioning block to form a total of 8 processing positions. The curvature of the arc-shaped grooves matches the arc surface on the workpiece.

[0008] Furthermore, the pressure plate component includes: a connecting block, a second through hole, a slider, and an arc-shaped pressure block head; the connecting block has a second through hole at its center, the diameter of which is larger than the diameter of the first fixing bolt; the slider is fixedly installed on the lower surface of the connecting block by welding; the arc-shaped pressure block head is fixedly installed on the upper surface of the connecting block by welding; and the arc-shaped structure on the arc-shaped pressure block head matches the arc shape on the workpiece.

[0009] Beneficial effects:

[0010] 1. In the utility model, the fixing component is firmly welded to the support plate. The positioning slide rail set on the fixing component cooperates with the positioning block. Each positioning block has two symmetrical arc grooves to jointly construct 8 clamping stations. The arc grooves cooperate with the curvature of the workpiece to fix it, ensuring the rapid placement and clamping of aerospace parts, reducing the clamping and adjustment time, and thus increasing the processing output of the milling machine per unit time.

[0011] 2. In the utility model, a positioning slide rail is provided on the protrusion formed by the fixing block and the clearance groove. The positioning slide rail is tightly fitted with the groove at the bottom of the aviation part, which has high-precision initial positioning. The arc groove on the positioning block ensures that the aviation part receives uniform and consistent full support and circumferential positioning. At the same time, the arc-shaped pressure block head covers and applies pressure to achieve tight and uniform contact between the arc surface and the surface of the aviation part, so that the pressure distribution avoids the displacement or deformation of the workpiece during processing and improves the clamping and positioning accuracy of the aviation part. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0013] Figure 2 Front view of this utility model;

[0014] Figure 3 Vertical sectional view of this utility model;

[0015] Figure 4 A schematic diagram of the fixing component structure of this utility model;

[0016] Figure 5 A schematic diagram of the pressure plate component of this utility model.

[0017] In the figure, the correspondence between the component names and the attached drawing numbers is as follows: Support plate 1, Through hole 101, Fixing component 2, Fixing block 201, Slide groove 202, Threaded hole 203, Clear groove 204, Positioning slide rail 205, Positioning block 3, Arc groove 301, Pressure plate component 4, Connecting block 401, Through hole 2 402, Slider 403, Arc pressure block head 404, Workpiece 5, Fixing bolt 1 6, Fixing bolt 2 7. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] As attached Figure 1 To be continued Figure 5 As shown:

[0020] This embodiment provides a special fixture for milling aerospace parts, including: a support plate 1, a through hole 101, a fixing component 2, a positioning block 3, an arc groove 301, a pressure plate component 4, a fixing bolt 6, and a fixing bolt 7. The support plate 1 is a cuboid structure with a through hole 101. The fixing component 2 is fixedly installed on the upper surface of the support plate 1, and the positioning block 3 is fixedly installed on the upper surface of the fixing component 2. Arc grooves 301 are symmetrically arranged on both sides of the positioning block 3. The pressure plate component 4 is movably connected to the fixing component 2 by the fixing bolt 6.

[0021] Preferably, the support plate 1 is provided with four through holes 101, the diameter of which is larger than the diameter of the fixing bolts 7, so that the support plate 1 can be fixedly installed on the machining table of the milling machine by means of the fixing bolts 7.

[0022] Preferably, the fixing component 2 includes: a fixing block 201, a sliding groove 202, a threaded hole 203, a clearance groove 204, and a positioning slide rail 205; the fixing block 201 is fixedly installed on the upper surface of the support plate 1 by welding. The fixing block 201 has a cuboid structure. Two sliding grooves 202 are symmetrically arranged on both sides of the fixing block 201. Four threaded holes 203 are arranged on each side of the fixing block 201. The threaded holes 203 cooperate with the fixing bolts 6. Three clearance grooves 204 are arranged on the upper surface of the fixing block 201. The positioning slide rail 205 is arranged on the protrusion formed by the fixing block 201 and the clearance grooves 204. The positioning slide rail 205 cooperates with the bottom groove of the workpiece 5 for fixation.

[0023] In a specific embodiment: the support plate 1 is fixed to the milling machine through through hole 101 and fixing bolt 7. The fixture as a whole can be quickly installed or disassembled on the milling machine, shortening the production preparation time. The fixing component 2 is welded to the support plate 1. The fixing component 2 is provided with a sliding groove 202, a threaded hole 203, a clearance groove 204 and a positioning slide rail 205. Four positioning blocks 3 are welded to the boss of the fixing component 2. Two arc-shaped grooves 301 are symmetrically arranged on each positioning block 3, thus creating 8 clamping stations. The curvature of the arc-shaped groove 301 matches the curvature of the workpiece 5. A single clamping can fix 8 workpieces 5. The positioning slide rail 205 and the groove of the workpiece 5, and the arc-shaped groove 301 and the arc surface of the workpiece 5 are closely matched, realizing the rapid and accurate placement of aerospace parts, reducing adjustment time and increasing the unit time output of the milling machine.

[0024] Preferably, the positioning block 3 has 4 parts, which are fixedly installed on the boss formed by the fixing block 201 and the clearance groove 204 by welding. The positioning block 3 has two arc-shaped grooves 301 on both sides, forming a total of 8 processing positions. The curvature of the arc-shaped grooves 301 matches the arc surface on the workpiece 5.

[0025] Preferably, the pressure plate component 4 includes: a connecting block 401, a second through hole 402, a slider 403, and an arc-shaped pressure head 404; the connecting block 401 has a second through hole 402 at its center, the diameter of the second through hole 402 being larger than the diameter of the first fixing bolt 6; the slider 403 is fixedly installed on the lower surface of the connecting block 401 by welding; the arc-shaped pressure head 404 is fixedly installed on the upper surface of the connecting block 401 by welding; the arc-shaped structure on the arc-shaped pressure head 404 matches the arc shape on the workpiece 5.

[0026] In a specific embodiment: a positioning slide rail 205 is provided on the protrusion formed by the fixed block 201 and the clearance groove 204. The positioning slide rail 205 precisely engages with the bottom groove of the workpiece 5 to ensure the high-precision initial positioning of the workpiece 5. Two arc-shaped grooves 301 are provided on both sides of the four positioning blocks 3 to provide clamping stations for processing eight aerospace parts. The curvature of the arc-shaped grooves 301 matches the arc surface of the workpiece 5, providing uniform support and positioning, ensuring that all workpieces have a uniform posture and eliminating individual differences. The slider 403 in the pressure plate component 4 provides guidance, and the arc surface of the arc-shaped pressure block head 404 closely fits the surface of the workpiece 5. The arc structure closely fits the corresponding arc surface of the workpiece 5 to apply pressure, uniformly distributes pressure, and prevents the workpiece from shifting or deforming, thereby maintaining high positioning accuracy stably throughout the entire processing of aerospace parts.

[0027] Working principle: The support plate 1 is quickly locked to the milling machine table through four through holes 101 and fixing bolts 7, significantly shortening the production preparation time. The positioning slide rail 205 cooperates with the bottom groove of the workpiece 5 to provide a rigid main positioning reference, ensuring that the initial positioning accuracy of the workpiece in the horizontal direction reaches ±0.04mm. The four positioning blocks 3 are provided with arc-shaped grooves 301 on both sides that match the arc surface of the workpiece 5, forming eight standardized clamping stations. When the workpiece 5 is clamped, because the fixing bolts 6 and the through holes 402 are clearance fit, the pressure plate component 4 can surround the through holes 402. The rotation of the center position of 02 facilitates the placement of workpiece 5 into the positioning slide rail 205. Workpiece 5 achieves precise positioning through the engagement of the bottom groove with the positioning slide rail 205. At the same time, its arc surface is embedded in the corresponding arc groove 301 to obtain uniform support and circumferential angle constraint. By rotating the fixing bolt 6 to press the pressure plate component 4, the arc-shaped pressure block head 404 adaptively presses the upper surface of the workpiece with its contoured arc surface, so that the clamping force acts perpendicularly to the center of curvature of the workpiece, evenly distributing the pressure to the entire contact area, completely suppressing the risk of deformation of thin-walled parts, and maintaining the stability of positioning accuracy under processing vibration.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A special fixture for milling aerospace parts, comprising: Support plate (1), through hole one (101), fixing component (2), positioning block (3), arc groove (301), pressure plate component (4), fixing bolt one (6) and fixing bolt two (7); characterized in that: the support plate (1) is a cuboid structure, the support plate (1) is provided with through hole one (101), the fixing component (2) is fixedly installed on the upper surface of the support plate (1), the positioning block (3) is fixedly installed on the upper surface of the fixing component (2), the positioning block (3) is symmetrically provided with arc grooves (301) on both sides, and the pressure plate component (4) is movably connected to the fixing component (2) through fixing bolt one (6).

2. The special fixture for milling aerospace parts as described in claim 1, characterized in that: The support plate (1) is provided with four through holes (101). The diameter of the through holes (101) is larger than the diameter of the fixing bolts (7) so that the support plate (1) can be fixedly installed on the milling machine's worktable by the fixing bolts (7).

3. The special fixture for milling aerospace parts as described in claim 1, characterized in that: The fixing component (2) includes: a fixing block (201), a sliding groove (202), a threaded hole (203), a clearance groove (204), and a positioning slide rail (205); the fixing block (201) is fixedly installed on the upper surface of the support plate (1) by welding. The fixing block (201) is a cuboid structure. Two sliding grooves (202) are symmetrically arranged on both sides of the fixing block (201). Four threaded holes (203) are arranged on both sides of the fixing block (201). The threaded holes (203) cooperate with the fixing bolt (6). Three clearance grooves (204) are arranged on the upper surface of the fixing block (201). A positioning slide rail (205) is arranged on the protrusion formed by the fixing block (201) and the clearance groove (204). The positioning slide rail (205) cooperates with the bottom groove of the workpiece (5) for fixation.

4. The special fixture for milling aerospace parts as described in claim 1, characterized in that: The positioning block (3) has four fixed installations on the boss formed by the fixing block (201) and the clearance groove (204) by welding. The positioning block (3) has two arc grooves (301) on both sides, forming a total of eight processing positions. The arc of the arc groove (301) matches the arc surface on the workpiece (5).

5. The special fixture for milling aerospace parts as described in claim 1, characterized in that: The pressure plate component (4) includes: a connecting block (401), a second through hole (402), a slider (403), and an arc-shaped pressure block head (404); the connecting block (401) has a second through hole (402) at its center, the diameter of the second through hole (402) is larger than the diameter of the first fixing bolt (6), the slider (403) is fixedly installed on the lower surface of the connecting block (401) by welding, and the arc-shaped pressure block head (404) is fixedly installed on the upper surface of the connecting block (401) by welding, and the arc-shaped structure on the arc-shaped pressure block head (404) matches the arc on the workpiece (5).

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