Thin-wall radial safety punching point device for precise piston rod of aero-engine

Abstract

The invention discloses a thin-wall radial safety punching point device for a precise piston rod of an aero-engine, which comprises a piston rod fixing component, a positioning component and a positioning component, the piston rod fixing component is provided with a fixing hole matched with the piston rod and a circle of limiting groove, and the bottom of the limiting groove is provided with at least two processing holes communicated with the fixing hole; each punch assembly comprises a punch and a spring, the punch is arranged in the machining hole, the length of the punch is larger than that of the machining hole, the spring is arranged on the punch in a sleeving mode and can drive the punch to move in the direction away from the circle center of the fixing hole, and the lengths of the punches of all the punch assemblies are equal; the pressing assembly comprises a rotating cylinder arranged in the limiting groove in a sleeved mode, and the rotating cylinder is provided with a punching part tightly attached to the groove bottom of the limiting groove and an adjusting groove used for adjusting the length of the punch stretching out of the machining hole. At least two safe pits with the same depth and size can be punched at a time, and the machining quality of the piston rod is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of piston rod processing, and in particular relates to a thin-wall radial safety punching point device for a precision piston rod of an aero-engine. Background Art

[0002] A precision piston rod of an aircraft engine is made of glass bronze QBe2 and is mounted on a booster nozzle regulator assembly. When assembling the parts, a screw plug needs to be installed in a threaded hole at one end of the piston rod, and a point is punched on the thin wall surface of the outer diameter of the piston rod to deform it and prevent the screw plug from falling out due to vibration and temperature changes when the engine is working.

[0003] The existing method of punching points on the thin wall surface of the outer diameter of the piston rod is to hit it hard with a hammer. However, the existing method has the following defects: If the knocking method is used, the sample punch position is easily offset if the knocking is too high, and finally the correct safety position cannot be knocked; Due to the characteristics of the part material that is easy to crack and the thin-walled structure, when the hammer hits the sample punch with force, if the force is improper, too much force will cause the part to crack; too little force will cause the insurance pit to be too small and cannot play the role of insurance. Summary of the invention

[0004] In order to solve the problem that the existing safety pits are processed in poor position, size and quality, the present invention proposes a thin-wall radial safety punching point device for a precision piston rod of an aero-engine.

[0005] The objective of the present invention is achieved through the following technical solutions: The invention discloses a thin-wall radial safety punching point device for a precision piston rod of an aero-engine, comprising: A piston rod fixing assembly, wherein the piston rod fixing assembly is provided with a fixing hole for matching with the piston rod and a circle of limiting grooves, and the bottom of the limiting groove is provided with at least two processed holes connected with the fixing hole; At least two punch assemblies, each punch assembly includes a punch placed in the processing hole and having a length greater than the length of the processing hole and a spring sleeved on the punch that can drive the punch to move away from the center of the fixed hole, and the punches of all punch assemblies have the same length; The pressing assembly comprises a rotating drum sleeved in the limiting groove, the rotating drum is provided with a punching portion tightly attached to the bottom of the limiting groove and an adjusting groove for adjusting the length of the punch protruding from the processing hole.

[0006] The beneficial effects of the present invention are: The invention can punch at least two safety pits of the same depth and size at one time by matching the piston rod fixing component, the punch component and the pressing component, thereby improving the processing quality of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0008] Figure 1 It is a cross-sectional view of the thin-wall radial safety punching point device of the precision piston rod of the aircraft engine of the present invention; Figure 2 It is a front view of the thin-wall radial safety punching point device of the precision piston rod of the aircraft engine of the present invention; Figure 3 for Figure 2 BB cross-sectional view; Figure 4 for Figure 2 AA section view; Figure 5 It is a three-dimensional diagram of the thin-wall radial safety punching point device of the precision piston rod of the aircraft engine of the present invention; Figure 6 A three-dimensional diagram of a pressing component. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0010] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0012] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0013] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0014] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] The present invention discloses a thin-wall radial safety punching device for a precision piston rod of an aircraft engine, which comprises a piston rod fixing assembly 1, at least two punch assemblies and a pressing assembly. Figures 1 to 6 As shown, the piston rod fixing assembly is provided with a fixing hole 11 and a circle of limiting grooves 12 for matching with the piston rod, and at least two processing holes connected to the fixing hole are provided at the bottom of the limiting groove 12. The number and setting position of the punch assembly are determined by the number and position of the safety pits of the piston rod to be punched; each punch assembly includes a punch 21 placed in the processing hole and having a length greater than the length of the processing hole, and a spring 22 sleeved on the punch 21 to drive the punch 21 to move away from the center of the fixing hole 11, and the length of the punches 21 of all punch assemblies is equal. The pressing assembly includes a rotating cylinder 31 sleeved in the limiting groove 12, and the rotating cylinder 31 is provided with a punching portion 311 tightly attached to the bottom of the limiting groove 12 and an adjusting groove 312 for adjusting the length of the punch 21 extending out of the processing hole. That is, the distance between the adjusting groove 312 and the bottom of the limiting groove 12 is greater than the distance between the punching portion 311 and the bottom of the limiting groove 12.

[0016] The rotation control of the drum 31 can be manually controlled, such as Figure 1 As shown, a rotating handle 32 is directly provided on the rotating drum 31; electric control can also be adopted. In this case, a driven gear can be fixedly provided on the outer surface of the rotating drum 31, and the existing structure of motor plus driving gear can be used to drive the driven gear to rotate.

[0017] With the above structure, in order to achieve buffering of the piston rod punching and improve the processing quality, the adjustment groove 312 is arc-shaped.

[0018] In order to meet the requirements of radial safety punch points of the existing precision piston rod of an aircraft engine, for example, there are three adjustment grooves 312 and three punch assemblies, which are evenly arranged along the circumference of the fixing hole 11. That is, two adjacent punches 21 are arranged at 120 degrees.

[0019] The spring realizes automatic resetting of the punch. In order to improve the reliability of the spring resetting and not affect the rotation of the drum 31, the punch 21 includes a pressing section and a punch section with a diameter smaller than the diameter of the pressing section. A limiting step structure is provided on the processing hole. The spring 22 is sleeved on the punch section and its two ends are respectively abutted between the end face of the pressing section and the limiting step structure.

[0020] To facilitate the installation of the rotating cylinder 31 , the piston rod fixing assembly 1 includes a fixing cylinder 13 having a limiting protrusion structure 131 on the outer wall, an end cover 14 fixed to one end of the fixing cylinder 13 to form a limiting groove 12 between the limiting protrusion structure 131 , and the fixing hole 11 is arranged on the fixing cylinder 13 .

[0021] In order to improve the stability of the piston rod during the punching process and improve the processing quality, one end of the fixing hole 11 is provided with an insertion hole section with a hole diameter larger than the hole diameter of the fixing hole 11, and a fixing nut 15 for fixing the piston rod is detachably connected to the insertion hole section.

[0022] In order to facilitate the adjustment of the horizontality of the piston rod during processing and improve the processing quality, the piston rod fixing assembly 1 is fixed on a supporting platform, and the supporting platform includes a supporting platform 42, a side plate 41 fixed on the supporting platform 42 and used to fix the piston rod fixing assembly 1, and an adjustment structure 43 for adjusting the horizontal state of the supporting platform 42, and a through hole structure is provided at a position corresponding to the side plate 41 and the fixing hole 11.

[0023] In order to simplify the structure of the adjustment structure 43, the adjustment structure 43 includes at least three screws, and the height is adjusted by the screws, which has a simple structure and is easy to operate.

[0024] With the above structure, when processing the piston rod, the rotating drum 31 is rotated to make the punch 21 fully extend out of the fixing hole 11, and then the piston rod 5 is placed in the fixing hole 11, the fixing nut 15 is pressed, and the screw is adjusted to make the piston rod horizontal. The rotating drum 31 is controlled to rotate. At this time, since the distance between the adjusting groove 312 and the bottom of the limiting groove 12 is in a gradual state, during the rotation process, the punch 21 is gradually pressed and extends into the fixing hole 11. When the punching part 311 rotates to the processing hole position, the length of the punch 21 inserted into the fixing hole 11 is the longest, that is, the processing of the safety pit is completed; the rotating drum 31 is continued to rotate, and the punch 21 gradually extends out of the fixing hole 11 under the action of the spring, and the fixing nut 15 and the piston rod can be removed.

[0025] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A thin-wall radial safety punching point device for a precision piston rod of an aircraft engine, characterized in that: include: A piston rod fixing assembly (1), wherein the piston rod fixing assembly is provided with a fixing hole (11) for matching with the piston rod and a circle of limiting grooves (12), and the bottom of the limiting groove (12) is provided with at least two machined holes connected with the fixing hole; At least two punch assemblies, each punch assembly comprising a punch (21) placed in the processing hole and having a length greater than the length of the processing hole, and a spring (22) sleeved on the punch (21) and capable of driving the punch (21) to move in a direction away from the center of the fixed hole (11), and the punches (21) of all the punch assemblies have the same length; A pressing assembly, the pressing assembly comprising a rotating cylinder (31) sleeved in the limiting groove (12), the rotating cylinder (31) being provided with a punching portion (311) closely attached to the bottom of the limiting groove (12) and an adjusting groove (312) for adjusting the length of the punch (21) extending out of the processed hole.

2. A thin-wall radial safety punching point device for a precision piston rod of an aircraft engine according to claim 1, characterized in that: The adjustment groove (312) is arc-shaped.

3. The thin-wall radial safety punching point device for the precision piston rod of an aircraft engine according to claim 1, characterized in that: The adjusting grooves (312) and punch assemblies are each in number of three and are evenly arranged along the circumference of the fixing hole (11).

4. A thin-wall radial safety punch point device for a precision piston rod of an aircraft engine according to claim 1, characterized in that: The punch (21) comprises a pressing section and a punch section with a diameter smaller than the diameter of the pressing section, a limiting step structure is provided on the processing hole, and the spring (22) is sleeved on the punch section with two ends respectively abutting between the end surface of the pressing section and the limiting step structure.

5. The thin-wall radial safety punch point device for the precision piston rod of an aircraft engine according to claim 1, characterized in that: The piston rod fixing assembly (1) comprises a fixing cylinder (13) having a limiting protrusion structure (131) on an outer wall, and an end cover (14) fixed to one end of the fixing cylinder (13) to form a limiting groove (12) between the fixing cylinder (13) and the limiting protrusion structure (131), wherein the fixing hole (11) is arranged on the fixing cylinder (13).

6. A thin-wall radial safety punching point device for a precision piston rod of an aircraft engine according to claim 5, characterized in that: One end of the fixing hole (11) is provided with an insertion hole section having a hole diameter larger than the hole diameter of the fixing hole (11), and a fixing nut (15) for fixing the piston rod is detachably connected to the insertion hole section.

7. The thin-wall radial safety punch point device for the precision piston rod of an aircraft engine according to claim 1, characterized in that: The piston rod fixing assembly (1) is fixed on a support platform, the support platform comprising a support platform (42), a side plate (41) fixed on the support platform (42) and used to fix the piston rod fixing assembly (1), and an adjustment structure (43) used to adjust the horizontal state of the support platform (42), and a through hole structure is provided at a position corresponding to the fixing hole (11) on the side plate (41).

8. The thin-wall radial safety punch point device for the precision piston rod of an aircraft engine according to claim 1, characterized in that: The adjustment structure (43) comprises at least three screws.

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