Shot blasting test device for simulating aviation parts

Abstract

The invention discloses a shot peening test device for simulating aviation parts, which comprises a rotating shaft, an adjusting seat, an L-shaped base and a test piece fixer, the top of the rotating shaft is provided with the adjusting seat, and one side of the adjusting seat is provided with the test piece fixer through the L-shaped base; a positioning column is arranged at the top of the rotating shaft, a sliding groove is transversely formed in the middle of the adjusting seat, the positioning column penetrates through the sliding groove in a sliding mode and is connected with a locking nut, the bottom of the L-shaped base is connected with the sliding groove in a sliding mode, and the L-shaped base is fixedly connected with the adjusting seat through an M8 bolt. By adjusting the position of the adjusting seat on the rotating shaft and / or the position of the L-shaped base in the sliding groove, the device is suitable for simulation shot peening tests of workpieces of various sizes and specifications on a shot peening machine, has the advantages of being easy and convenient to operate, high in clamping efficiency and high in universality, and effectively improves the efficiency of the shot peening tests.

Description

Technical Field

[0001] The invention belongs to the technical field of shot peening strengthening test of shaft parts in aviation products, and in particular relates to a shot peening test device for simulating aviation parts. Background Art

[0002] Since there will be a certain degree of residual stress on the surface layer of the parts obtained by various mechanical processing methods, the causes of residual stress are relatively complex and difficult to measure and observe, but a large number of production practices have shown that its impact on product quality and service life is obvious and significant. Generally speaking, when there is residual tensile stress on the surface, the fatigue strength of the part will decrease, and when there is residual compressive stress on the surface, the fatigue strength of the part will increase. For parts with stress concentration, the impact is more significant. Therefore, during mechanical processing, it is always best not to generate residual tensile stress on the surface of the part, and even try to generate residual compressive stress on the surface of the part. It is commonly used to add a surface strengthening process to the process flow. This is a processing method that causes cold plastic deformation of the surface layer through cold pressing, increases hardness, and generates residual compressive stress. Shot peening is a more commonly used method.

[0003] Shot peening, also known as shot peening, is the process of spraying a high-speed stream of projectiles onto the surface of a workpiece, causing plastic deformation of the surface layer of the workpiece to form a strengthening layer of a certain thickness. A higher residual stress is formed in the strengthening layer. Due to the existence of compressive stress on the surface of the workpiece, when the workpiece is subjected to load, part of the stress can be offset, thereby improving the fatigue strength of the workpiece. Shot peening intensity is often used as a measurement indicator to indicate the impact of the projectile on the metal surface. The Almen specimen is a standard specimen used to characterize shot peening intensity and is an effective means of quality control in shot peening technology. The Almen specimen needs to be fixed on a special fixture, and the installation position should be able to simulate the actual situation of the workpiece surface receiving the bullet flow. After the test piece is shot peened, the arc height value generated by the test piece after shot peening can be used to measure the shot peening intensity.

[0004] According to HB / Z 26-2011 "Shot Peening Process for Aviation Parts", in order to meet the shot peening requirements specified in the product drawings, simulated shot peening must be performed on the parts before the formal shot peening production, and the size of the simulated parts must be consistent with the size of the actual parts. For a wide variety of aviation products, shaft parts are key parts in the products. The outer circle / inner hole sizes of various shaft parts are inconsistent, and the size range varies greatly. If the size of the simulated part shot peening is inconsistent with the size of the part to be shot peened, it will directly lead to inconsistent strengthening results, which will seriously affect the effect of improving fatigue strength.

[0005] The existing technology is to make rotating body fixtures of various specifications, weld a standard Armin specimen holder on the end face of the fixture, fix the rotating body fixture at the center of the three-jaw chuck, and simulate the shot peening experiment of various shaft parts by the continuous rotation of the chuck. However, each simulated shot peening fixture can only simulate shaft parts of one size, and a variety of shot peening fixtures of different sizes are required, resulting in low versatility and frequent resource conflicts for shot peening fixtures for simulated shaft parts. Secondly, the shot peening fixture for simulated parts is inconvenient to install and disassemble, which is time-consuming and labor-intensive, consumes a lot of process preparation time, and the process is very complicated. The clamping efficiency is low, which reduces the shot peening efficiency. Summary of the invention

[0006] The object of the present invention is to provide a shot peening test device for simulating aviation parts, aiming to solve the above-mentioned problem of low versatility.

[0007] The present invention is mainly achieved through the following technical solutions: A shot peening test device for simulating aviation parts comprises a rotating shaft, an adjustment seat, an L-shaped base and a test piece holder, wherein the adjustment seat is installed on the top of the rotating shaft, and the test piece holder is installed on one side of the adjustment seat through the L-shaped base; a positioning column is arranged on the top of the rotating shaft, a slide groove is horizontally opened in the middle of the adjustment seat, the positioning column slides through the slide groove and is connected with a locking nut, the bottom of the L-shaped base is slidably connected with the slide groove, and the L-shaped base and the adjustment seat are fixedly connected by M8 bolts.

[0008] In order to better realize the present invention, further, an adjustment seat is slidably installed on the top of the rotating shaft, guide columns are arranged laterally on both sides of the top of the rotating shaft, and an adjustment seat is slidably arranged between adjacent guide columns; an L-shaped base is fixedly installed on one end of the adjustment seat.

[0009] In order to better realize the present invention, further, a linear drive mechanism is also provided on the top of the rotating shaft, and the linear drive mechanism is used to drive the adjustment seat to move linearly in the lateral direction; the linear drive mechanism includes a drive motor, a drive gear and a rack, and an installation groove is provided on the top of the rotating shaft, and the drive motor is embedded and installed in the installation groove, and a drive gear is installed on the outer side of the drive shaft of the drive motor, and a rack is provided on one side of the slide groove along the lateral direction corresponding to the drive gear.

[0010] In order to better implement the present invention, further, one side of the slide groove is a stepped structure, and a rack is provided at the lower end of the slide groove with a larger inner diameter along the lateral direction corresponding to the driving gear.

[0011] In order to better implement the present invention, further, a positioning column is rotatably provided on the top of the driving shaft of the driving motor.

[0012] In order to better implement the present invention, further, a plug-in slot is provided at the end of the adjustment seat corresponding to the L-shaped base, and one end of the M8 bolt extends into the plug-in slot and is connected to the L-shaped base.

[0013] In order to better implement the present invention, further, the test piece holder is plugged into the top of the L-shaped base, and the L-shaped base is fixedly connected to the bottom end of the test piece holder by M8 bolts.

[0014] In order to better realize the present invention, further, the bottom end of the L-shaped base is slidably connected to the slide groove through a sliding protrusion, and an electromagnetic drive mechanism is arranged between the sliding protrusion and the positioning column; the electromagnetic drive mechanism includes an electromagnetic mechanism and a buffer spring, the electromagnetic mechanism is fixedly arranged on the side of the positioning column close to the sliding protrusion, and a buffer spring is arranged between the electromagnetic mechanism and the sliding protrusion, and the sliding protrusion is prepared by a magnet.

[0015] In order to better implement the present invention, further, the length of the rotary shaft is 220 mm.

[0016] The beneficial effects of the present invention are as follows: The present invention can adapt to simulated shot peening tests on workpieces of various sizes and specifications on a shot peening machine by adjusting the position of the adjustment seat on the rotating shaft and / or the position of the L-shaped base in the slide. When the chuck rotates, it drives the rotating shaft, the adjustment seat, the L-shaped base, and the test piece holder to continuously make circular motions in the horizontal direction. At the same time, the projectile passes through the spray gun and is sprayed onto the surface of the Armin test piece at a 90° direction to the Armin test piece, thereby simulating the shot peening test of shaft workpieces of various diameters; when the chuck does not rotate, the shot peening test of simulated flat workpieces is realized. It has the advantages of simple and convenient operation, high clamping efficiency, and strong versatility, which effectively improves the efficiency of the shot peening test. Specifically, according to the outer circle or inner hole size of the shaft workpiece to be shot peened, the present invention can adaptively manually adjust the position of the adjustment seat on the rotating shaft and / or the position of the L-shaped base in the slide, or drive the adjustment seat to move in a lateral linear motion at the top of the rotating shaft through a linear drive mechanism, or drive the L-shaped base to move in a lateral linear motion along the slide through an electromagnetic drive mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the device for simulating the shot peening test of aviation parts according to the present invention; Figure 2 for Figure 1 Left view of Figure 3 It is a schematic diagram of the connection structure between the linear drive mechanism and the adjustment seat; Figure 4 It is a schematic diagram of the connection structure between the electromagnetic drive mechanism and the adjustment seat.

[0018] Among them: 1-rotating shaft, 2-adjusting seat, 3-locking nut, 4-L-type base, 5-M8 bolt, 6-test piece holder, 7-positioning column, 8-driving gear, 9-rack, 10-electromagnetic mechanism, 11-sliding protrusion, 12-buffer spring. DETAILED DESCRIPTION

[0019] Embodiment 1: A shot peening test device simulating an aerospace component, such as Figure 1 and Figure 2 As shown, it includes: a rotary shaft 1 for clamping the chuck of the shot peening machine, an adjustment seat 2 with a slide groove for adjusting the distance, a locking nut 3, an L-shaped base 4, a test piece holder 6 with an M5 threaded hole matrix and an M8 bolt 5 for fixing.

[0020] The bottom of the rotary shaft 1 is connected to the chuck, and a positioning column 7 is provided on the top. A slide groove is provided in the middle of the adjustment seat 2. The positioning column 7 passes through the slide groove and is connected to the locking nut 3. After adjusting the extension length of the adjustment seat 2, tighten the locking nut 3 to fix the adjustment seat 2 to the rotary shaft 1. The bottom of the L-shaped base 4 slides into the slide groove, and one end of the M5 bolt is extended into the slide groove from the bottom and connected to the bottom of the L-shaped base 4, that is, the L-shaped base 4 is fixedly installed on the adjustment seat 2 by the M5 bolt. The test piece holder 6 is plugged into the top of the L-shaped base 4. Similarly, the test piece holder 6 is fixedly installed on the top of the L-shaped base 4 by the M5 bolt.

[0021] A chuck is provided at the center of the rotating platform of the shot peening machine. A rotating shaft 1 with a length of 220 mm is clamped at the center of the chuck. The adjusting seat 2 with a slide groove is fixed to the upper end of the rotating shaft 1 with a locking nut 3. The L-shaped base 4 is installed to any position in the slide groove of the adjusting seat 2 and fixed with an M8 bolt 5. The inserted test piece holder 6 is fixed with an M8 bolt 5 in the square groove of the L-shaped base 4. The standard Almin test piece can be fixed on the positioning surface of the test piece holder 6 with an M5 bolt.

[0022] According to the outer circle or inner hole size of the shaft-like workpiece to be shot peened, adjust the position of the adjustment seat 2 on the rotating shaft 1 and / or the position of the L-shaped base 4 in the slide groove. The present invention can adapt to various sizes of workpieces to perform simulated shot peening tests on the shot peening machine, and has the advantages of simple and convenient operation, high clamping efficiency, and strong versatility. When the chuck rotates, it drives the rotating shaft 1, the adjustment seat 2, the L-shaped base 4, and the test piece holder 6 to continuously make circular motions in the horizontal direction. At the same time, the projectile passes through the spray gun at a 90° direction to the Armin test piece and is sprayed onto the surface of the Armin test piece, thereby simulating the shot peening test of shaft-like workpieces of various diameters; when the chuck does not rotate, it simulates the shot peening test of planar workpieces.

[0023] Embodiment 2: A shot peening test device for simulating aviation parts, comprising a rotating shaft 1, an adjustment seat 2, an L-shaped base 4 and a test piece holder 6. A chuck is provided at the center of the rotating platform of the shot peening machine. The bottom of the rotating shaft 1 is clamped and connected with the chuck, and the adjustment seat 2 is slidably installed on the top. A linear drive mechanism is also provided on the top of the rotating shaft 1, and the linear drive mechanism is used to drive the adjustment seat 2 to move in a horizontal linear direction. A test piece holder 6 is installed on one side of the adjustment seat 2 through the L-shaped base 4. The bottom of the L-shaped base 4 is plugged with the end of the adjustment seat 2 and fixed by an M8 bolt 5.

[0024] like Figure 3 As shown, the linear drive mechanism includes a driving motor, a driving gear 8 and a rack 9. A slide groove is provided in the middle of the adjustment seat 2. A driving motor is embedded and installed on the top of the rotating shaft 1. The driving shaft of the driving motor is rotatably connected with the positioning column 7 upward. The driving gear 8 is sleeved on the outer side of the driving shaft. A rack 9 is provided on one side of the slide groove. The driving motor drives the driving gear 8 to connect, and then meshes and drives the adjustment seat 2 with the rack 9 to move linearly along the top of the rotating shaft 1 in the horizontal direction. Specifically, one side of the slide groove is a stepped structure, and the diameter of the lower end is larger. A rack 9 is provided at the lower end of one side of the slide groove in the horizontal direction corresponding to the driving gear 8.

[0025] Preferably, guide columns are arranged on both sides of the top of the rotary shaft 1 in the transverse direction, and an adjustment seat 2 is slidably arranged between adjacent guide columns.

[0026] According to the outer circle or inner hole size of the shaft-like workpiece to be shot peened, the adjusting seat 2 is driven by a driving motor to move horizontally and linearly along the rotating shaft 1. The present invention can adapt to various sizes of workpieces to perform simulated shot peening tests on the shot peening machine, and has the advantages of simple and convenient operation, high clamping efficiency, and strong versatility. When the chuck rotates, it drives the rotating shaft 1, the adjusting seat 2, the L-shaped base 4, and the test piece holder 6 to continuously make circular motions in the horizontal direction. At the same time, the projectile passes through the spray gun at a 90° direction to the Armin test piece and is sprayed onto the surface of the Armin test piece, realizing the shot peening test of simulating shaft-like workpieces of various diameters; when the chuck does not rotate, the shot peening test of simulated flat workpieces is realized.

[0027] Embodiment 3: A shot peening test device for simulating aviation parts includes a rotating shaft 1, an adjustment seat 2, an L-shaped base 4 and a test piece holder 6. A chuck is provided at the center of the rotating platform of the shot peening machine. The bottom of the rotating shaft 1 is clamped and connected with the chuck, and the adjustment seat 2 is fixedly installed on the top; the test piece holder 6 is installed on one side of the adjustment seat 2 through the L-shaped base 4, and a sliding groove is provided in the middle of the adjustment seat 2. The bottom of the L-shaped base 4 is slidably connected with the sliding groove through a sliding protrusion 11. An electromagnetic driving mechanism is provided inside the sliding groove to drive the L-shaped base 4 to move laterally and linearly along the sliding groove.

[0028] like Figure 4 As shown, an electromagnetic drive mechanism is provided between the sliding protrusion 11 and the positioning column 7; the electromagnetic drive mechanism includes an electromagnetic mechanism 10 and a buffer spring 12, the electromagnetic mechanism 10 is fixedly provided on the side of the positioning column 7 close to the sliding protrusion 11, and a buffer spring 12 is provided between the electromagnetic mechanism 10 and the sliding protrusion 11, and the sliding protrusion 11 is made of a magnet. By controlling the power supply direction of the electromagnetic mechanism 10, the direction of its magnetic pole is changed, and then the linear drive of the sliding protrusion 11 is realized.

[0029] According to the outer circle or inner hole size of the shaft-like workpiece to be shot peened, the position of the L-shaped base 4 on the adjustment seat 2 is adjusted by the electromagnetic mechanism 10 and the sliding protrusion 11. The present invention can adapt to various sizes of workpieces to simulate shot peening tests on the shot peening machine, and has the advantages of simple and convenient operation, high clamping efficiency, and strong versatility. When the chuck rotates, it drives the rotating shaft 1, the adjustment seat 2, the L-shaped base 4, and the test piece holder 6 to continuously make circular motions in the horizontal direction. At the same time, the projectile passes through the spray gun at a 90° direction to the Armin test piece and is sprayed onto the surface of the Armin test piece, realizing the shot peening test of simulating shaft-like workpieces of various diameters; when the chuck does not rotate, the shot peening test of simulated flat workpieces is realized.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A shot peening test device for simulating aviation parts, characterized in that: The invention comprises a rotary shaft (1), an adjustment seat (2), an L-shaped base (4) and a test piece holder (6), wherein the adjustment seat (2) is installed on the top of the rotary shaft (1), and the test piece holder (6) is installed on one side of the adjustment seat (2) through the L-shaped base (4); a positioning column (7) is arranged on the top of the rotary shaft (1), a sliding groove is transversely opened in the middle of the adjustment seat (2), the positioning column (7) slides through the sliding groove and is connected to the locking nut (3), the bottom of the L-shaped base (4) is slidably connected to the sliding groove, and the L-shaped base (4) and the adjustment seat (2) are fixedly connected by an M8 bolt (5).

2. A shot peening test device for simulating aviation parts according to claim 1, characterized in that: An adjustment seat (2) is slidably mounted on the top of the rotary shaft (1); guide columns are arranged in the transverse direction on both sides of the top of the rotary shaft (1); and an adjustment seat (2) is slidably mounted between adjacent guide columns; an L-shaped base (4) is fixedly mounted on one end of the adjustment seat (2).

3. A shot peening test device for simulating aviation parts according to claim 2, characterized in that: A linear drive mechanism is also provided at the top of the rotary shaft (1), and the linear drive mechanism is used to drive the adjustment seat (2) to move in a lateral linear direction; the linear drive mechanism comprises a drive motor, a drive gear (8) and a rack (9); a mounting groove is provided at the top of the rotary shaft (1), the drive motor is embedded in the mounting groove, the drive gear (8) is sleeved and installed on the outer side of the drive shaft of the drive motor, and a rack (9) is provided on one side of the slide groove in a lateral direction corresponding to the drive gear (8).

4. A shot peening test device for simulating aviation parts according to claim 3, characterized in that: One side of the slide groove is a stepped structure, and a rack (9) is provided at the lower end of the slide groove with a larger inner diameter in a lateral direction corresponding to the driving gear (8).

5. The shot peening test device for simulating aviation parts according to claim 3, characterized in that: A positioning column (7) is rotatably provided at the top of the driving shaft of the driving motor.

6. The shot peening test device for simulating aviation parts according to claim 2, characterized in that: An inserting groove is provided at the end of the adjustment seat (2) corresponding to the L-shaped base (4), and one end of the M8 bolt (5) extends into the inserting groove and is connected to the L-shaped base (4).

7. A shot peening test device for simulating aviation parts according to claim 1 or 6, characterized in that: The test piece holder (6) is plugged into the top of the L-shaped base (4), and the L-shaped base (4) is fixedly connected to the bottom of the test piece holder (6) via an M8 bolt (5).

8. The shot peening test device for simulating aviation parts according to claim 1, characterized in that: The bottom end of the L-shaped base (4) is slidably connected to the slide groove via a sliding protrusion (11), and an electromagnetic drive mechanism is arranged between the sliding protrusion (11) and the positioning column (7); the electromagnetic drive mechanism comprises an electromagnetic mechanism (10) and a buffer spring (12); the electromagnetic mechanism (10) is fixedly arranged on a side of the positioning column (7) close to the sliding protrusion (11), and a buffer spring (12) is arranged between the electromagnetic mechanism (10) and the sliding protrusion (11); the sliding protrusion (11) is prepared by a magnet.

9. The shot peening test device for simulating aviation parts according to claim 1, characterized in that: The length of the rotary shaft (1) is 220 mm.

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