Internal tensioning grinding rod for vibration grinding of hardened internal spline and using method of internal tensioning grinding rod

Abstract

The invention belongs to the technical field of grinding, and discloses an internal tensioning grinding rod for vibration grinding of a hardened internal spline and a using method of the internal tensioning grinding rod. A top cover; the wedge-shaped internal spline tooth groove column is designed to be in a sleeve shape, one end is thick, the other end is thin, and a plurality of clamping grooves are evenly distributed in the circumferential face of the wedge-shaped internal spline tooth groove column; one end of the wedge-shaped internal spline tooth is thick, the other end of the wedge-shaped internal spline tooth is thin, and two opposite clamping teeth matched with the clamping grooves are arranged on the lower surface of the wedge-shaped internal spline tooth; the wedge-shaped internal spline tooth groove column is connected to the grinding rod in a clamped mode, the wedge-shaped internal spline teeth are connected to the wedge-shaped internal spline tooth groove column in an inserted mode, the bottom cover and the top cover are installed at the two ends of the wedge-shaped internal spline tooth groove column respectively, the main spring is limited through a nut, and the auxiliary spring is limited through a bolt. The problems that the vibration grinding internal spline grinding rod is unstable in connection, large in energy loss, limited in grinding efficiency improvement, low in replacement efficiency and the like are solved, and the fastening effect, vibration energy transmission and grinding rod replacement efficiency are remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of grinding, and relates to a grinding tool, in particular to an inner-tightening grinding rod for hardening internal spline vibration grinding and a use method thereof. BACKGROUND

[0002] Internal spline is a connecting structure used for transmitting torque and balancing axial movement, and is commonly used in rotating parts of aerospace equipment. In the field of aerospace, the accuracy and reliability of internal spline are crucial to ensure the safety and performance of aerospace vehicles. Aerospace internal spline adopts heat treatment hardening and grinding process to ensure the high durability and high precision use requirements of internal spline. The deformation caused by the organizational change in the hardening process is inevitable, and the industry generally uses grinding to restore precision.

[0003] Among them, the hardening internal spline vibration grinding method (invention patent application number: 202310706977.4) has good precision recovery effect and high quality, but the vibration transmission efficiency is greatly affected by the connection mode of the grinding rod. The vibration transmission efficiency is low due to small contact area and multiple contact surfaces and serious heating in the traditional clasp spring and threaded connection mode. The hardening internal spline is widely used in equipment power systems, control systems and other aerospace equipment, and the types and specifications are various. The grinding rod replacement and adaptation requirements are high, and the replacement efficiency is low.

[0004] The application is designed to improve the vibration transmission efficiency of hardening internal spline vibration grinding, and the grinding head can be internally tightened, which significantly improves the fastening effect, vibration energy transmission and grinding rod replacement efficiency. SUMMARY

[0005] The application develops an internal spline inner-tightening grinding rod for hardening internal spline vibration grinding method, which solves the problems of unstable connection of vibration grinding internal spline grinding rod, large energy loss, limited grinding efficiency improvement, and low replacement efficiency.

[0006] The technical scheme of the application is as follows: In a first aspect, the application provides an inner-tightening grinding rod for hardening internal spline vibration grinding, which comprises: A bottom cover designed as a flange with a ring-shaped flange on its inner wall, and a secondary spring placed therein; A top cover designed as a sleeve with a primary spring placed therein; A wedge-shaped internal spline tooth groove column designed as a sleeve with a thick end and a thin end, and a plurality of clamping grooves uniformly distributed on its circumferential surface; A wedge-shaped internal spline tooth with a thick end and a thin end, and two opposite clamping teeth on its lower surface matched with the clamping grooves; The wedge-shaped internal spline tooth slot column is clamped on the grinding rod, the wedge-shaped internal spline tooth is inserted into the wedge-shaped internal spline tooth slot column, the bottom cover and the top cover are respectively installed at two ends of the wedge-shaped internal spline tooth slot column, the main spring is limited by the nut, and the auxiliary spring is limited by the bolt.

[0007] As a further scheme of the present application, the wedge-shaped internal spline tooth slot column and the wedge-shaped internal spline tooth are adapted, and the outer circle diameter remains consistent after mutual connection.

[0008] As a further scheme of the present application, the clamping groove section is in the shape of a "convex" character, one clamping tooth occupies half of the clamping groove, and two opposite clamping teeth form a slot.

[0009] As a further scheme of the present application, a first recess is formed on the inner wall of the wedge-shaped internal spline tooth slot column, and a first protruding clamping table adapted to the recess is arranged on the grinding rod.

[0010] As a further scheme of the present application, a second protruding clamping table is arranged on the inner wall of the annular flange, and a second recess adapted to the second protruding clamping table is arranged on the grinding rod; and the bottom cover is clamped on the grinding rod.

[0011] As a further scheme of the present application, a gear is further arranged on the bottom cover, the number of the gears is consistent with that of the wedge-shaped internal spline teeth, the maximum outer diameter of the bottom cover is greater than the maximum outer diameter of the wedge-shaped internal spline tooth slot column, and less than the outer circle diameter of the connection between the wedge-shaped internal spline tooth slot column and the wedge-shaped internal spline tooth.

[0012] As a further scheme of the present application, the top cover comprises a barrel body and a barrel cover, the barrel cover is designed in a ring shape, the diameter of the barrel body is greater than the inner diameter of the barrel cover and less than the outer diameter of the barrel cover, and the outer diameter of the barrel cover is greater than the minimum outer diameter of the wedge-shaped internal spline tooth slot column. A set of rings is extended from the inner wall of the barrel cover in the direction of the barrel body, and the set of rings, the barrel body and the barrel cover jointly form a main spring placing groove.

[0013] As a further scheme of the present application, the nut is in a cylindrical shape, is adapted to the external thread on the grinding rod, and is used for limiting one end of the main spring.

[0014] As a further scheme of the present application, a gasket is further arranged on the annular flange, is used for limiting one end of the auxiliary spring, the other end of the auxiliary spring is limited by the bolt screwed on the grinding rod, and a washer is arranged between the two.

[0015] In the second aspect, the present application provides a use method of the internal expansion tightening grinding rod for hardening internal spline vibration grinding, which comprises the following steps: The grinding rod is assembled into a shape; The installation end of the grinding rod is connected and fixed by the ER spring collet and the machine tool. By holding the top cover with hand and pulling along the axial direction, the wedge-shaped inner spline teeth shrink to the center under the elastic force of the auxiliary spring, and the radial size of the grinding rod is reduced; Lower the main shaft height of the machine tool, and extend the grinding rod into the inner spline; Then, release the hand, and start the grinding process.

[0016] The application has the following beneficial effects: 1. The application designs a grinding rod that can be internally tightened to solve the problems of unstable connection of the vibration grinding inner spline grinding rod, large energy loss, limited grinding efficiency improvement, low replacement efficiency, etc.

[0017] 2. The self-tightening structure of the inner spline internally tightened grinding rod can adapt to workpieces of different diameters, realize quick clamping and disassembly. This feature not only improves production efficiency, but also reduces the time and effort spent by operators during clamping.

[0018] 3. The operator only needs to make simple adjustments to complete the clamping of workpieces of different specifications, greatly facilitating multi-specification small-batch production.

[0019] 4. The inner spline internally tightened grinding rod increases the vibration transmission contact area through the fastening mode of the wedge-shaped structure cooperating with each other, improves the vibration transmission efficiency, and significantly improves the grinding efficiency.

[0020] The application will be further described in detail below in combination with the accompanying drawings. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiment or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings obtained from these drawings without creative labor are still within the scope of the present application.

[0022] Figure 1 is a schematic diagram of the overall structure provided by the present application; Figure 2 is a main cross-sectional view of the overall structure provided by the present application; Figure 3 is a main cross-sectional view of the grinding rod provided by the present application; Figure 4 is a main cross-sectional view of the top cover provided by the present application; Figure 5 is a schematic diagram of the wedge-shaped inner spline tooth structure provided by the present application; Figure 6 is a schematic diagram of two different end faces of the wedge-shaped inner spline tooth provided by the present application; Figure 7 is a schematic diagram of a wedge-shaped internal spline tooth groove structure provided by the present application; Figure 8 is a schematic diagram of a bottom cover structure provided by the present application.

[0023] In the figure, the reference signs are: 7, bottom cover; 9, auxiliary spring; 2, top cover; 4, main spring; 6, wedge-shaped internal spline tooth groove column; 6-2, clamping groove; 5, wedge-shaped internal spline tooth; 5-1, clamping tooth; 1, grinding rod; 5-2, insertion groove; 6-1, first recess; 1-1, external thread; 1-2, first protruding clamping platform; 7-1, second protruding clamping platform; 1-3, second recess; 2-1, main spring placement groove; 3, nut; 8, gasket; 10, bolt; 1-4, gasket. DETAILED DESCRIPTION

[0024] For the purpose of implementing the present application, the technical solutions and advantages will be clearer, the technical solutions in the embodiments of the present application will be described in more detail below in combination with the drawings of the embodiments of the present application.

[0025] In the drawings, the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all of the embodiments.

[0026] The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. All other embodiments obtained by those skilled in the art on the basis of the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0027] The drawings will be described below in combination with the Figures 1-8 The embodiments of the present application will be described in detail.

[0028] Embodiment 1 Referring to Figures 1-8 , the present application provides an internal tensioning grinding rod for hardened internal spline vibration grinding, which comprises: a bottom cover 7 designed as a flange, with an annular flange on the inner wall, and the auxiliary spring 9 is placed therein; a top cover 2 designed as a sleeve, and the main spring 4 is placed therein; a wedge-shaped internal spline tooth groove column 6 designed as a sleeve, with one end thick and the other end thin, and a plurality of clamping grooves 6-2 uniformly distributed on the circumferential surface thereof; a wedge-shaped internal spline tooth 5, with one end thick and the other end thin, and two opposite clamping teeth 5-1 matched with the clamping grooves 6-2 provided on the lower surface thereof; The wedge-shaped internal spline tooth slot column 6 is clamped on the grinding rod 1, the wedge-shaped internal spline tooth 5 is inserted on the wedge-shaped internal spline tooth slot column 6, the bottom cover 7 and the top cover 2 are respectively installed at both ends of the wedge-shaped internal spline tooth slot column 6, the main spring 4 is limited by the nut 3, and the auxiliary spring 9 is limited by the bolt 10.

[0029] The outer thread 1-1 in the middle of the grinding rod 1 body is used to connect with the nut 3, the first protruding clamping table 1-2 in the lower middle of the grinding rod 1 body is used to connect with the first groove 6-1 of the wedge-shaped internal spline tooth slot column 6, and the second groove 1-3 at the bottom of the grinding rod 1 body is connected with the second protruding clamping table 7-1 of the bottom cover 7.

[0030] First, the first groove 6-1 of the wedge-shaped internal spline tooth slot column 6 is connected with the first protruding clamping table 1-2 of the grinding rod 1 through the clamping groove 6-2, then the second protruding clamping table 7-1 of the bottom cover 7 is connected with the second groove 1-3 of the grinding rod 1 through the clamping groove 6-2, the auxiliary spring 9 and the washer 1-4 are placed in the cavity of the bottom cover 7, then the bottom cover 7 is connected and fixed to the grinding rod 1 through the bolt 10, and the washer 1-4 is placed between the bottom cover 7 and the grinding rod 1; the wedge-shaped internal spline tooth 5 is inserted with the wedge-shaped internal spline tooth slot column 6, the clamping tooth 5-1 is connected with the clamping groove 6-2 of the wedge-shaped internal spline tooth slot column 6, a plurality of wedge-shaped internal spline teeth 5 are densely arranged in the circumferential direction, each wedge-shaped internal spline tooth 5 is connected with the wedge-shaped internal spline tooth slot column 6 through the clamping tooth 5-1 in the axial direction; the left end of the top cover 2 is sleeved with the nut 3, and the right end of the main spring 4 is inserted into the main spring placing groove 2-1. The nut 3 is connected with the outer thread 1-1 of the grinding rod 1 through screwing. Finally, the right end of the top cover 2 abuts against the left end of the wedge-shaped internal spline tooth slot column 6.

[0031] Further, the wedge-shaped internal spline tooth slot column 6 and the wedge-shaped internal spline tooth 5 are adapted to each other and have a consistent outer diameter after being connected. In this embodiment, the wedge-shaped groove is used for clamping, which mainly enhances the clamping force and stability. In addition, the shape design of the wedge-shaped groove helps to uniformly distribute the clamping force during clamping, avoiding the uneven pressure problem that may occur in traditional workpiece connection. This design combines the wedge-shaped groove with the internal spline to form an efficient clamping mechanism. During work, the wedge-shaped groove can expand outward under the action of the internal spline internal tensioning device, thereby achieving tight clamping of the workpiece. The advantage of this structure is that it can effectively resist the displacement of the workpiece when subjected to external force, ensuring the stability and precision of the workpiece during grinding and machining.

[0032] Further, the card slot 6-2 cross section is "convex" character, a card tooth 5-1 occupies half of the card slot 6-2, two opposite card teeth 5-1 constitute a slot 5-2. When the wedge-shaped inner spline tooth groove column 6 circumferential surface is uniformly distributed with several card slots 6-2, it is equivalent to that the wedge-shaped inner spline tooth groove column 6 circumferential surface is uniformly provided with several plug-in rails, which are matched with the slot 5-2.

[0033] Further, the first recess 6-1 is formed on the inner wall of the wedge-shaped inner spline tooth groove column 6, and the first protruding clamping table 1-2 is arranged on the grinding rod 1. The first recess 6-1 of the wedge-shaped inner spline tooth groove column 6 is connected with the first protruding clamping table 1-2 of the grinding rod 1 through the card slot 6-2, so as to ensure the stretching function of the inner spline inner expansion grinding head. The card slot 6-2 is connected with the card tooth 5-1 of the wedge-shaped inner spline tooth 5, and the wedge-shaped inner spline tooth groove column 6 is circumferentially filled with the wedge-shaped inner spline tooth 5. The design of the wedge-shaped recess clamping also improves the convenience of clamping. When adjusting or replacing the workpiece, the operator does not need complicated tools and steps, but only needs simple operation to realize fast clamping, which significantly improves the production efficiency.

[0034] Further, the second protruding clamping table 7-1 is arranged on the inner wall of the annular flange, and the second recess 1-3 matched with the second protruding clamping table 7-1 is arranged on the grinding rod 1. The bottom cover 7 is clamped on the grinding rod 1. The second protruding clamping table 7-1 is connected with the second recess 1-3 of the grinding rod 1 through the card slot 6-2. Such design facilitates the connection between the grinding rod bottom cover 7 and the grinding rod 1.

[0035] Further, the bottom cover 7 is also provided with a plurality of gear teeth, the number of the gear teeth is consistent with that of the wedge-shaped inner spline tooth 5, the maximum outer diameter of the bottom cover 7 is greater than the maximum outer diameter of the wedge-shaped inner spline tooth groove column 6, and less than the outer diameter of the connection between the wedge-shaped inner spline tooth groove column 6 and the wedge-shaped inner spline tooth 5.

[0036] Further, the top cover 2 includes a barrel body and a barrel cover, the barrel cover is designed as a ring, the diameter of the barrel body is greater than the inner diameter of the barrel cover and less than the outer diameter of the barrel cover, and the outer diameter of the barrel cover is greater than the minimum outer diameter of the wedge-shaped inner spline tooth groove column 6. A set of rings is extended from the inner wall of the barrel cover in the direction of the barrel body, and the set of rings, the barrel body and the barrel cover jointly constitute a main spring placing groove 2-1. The left end of the top cover 2 is sleeved with the nut 3, the right end of the main spring 4 is inserted into the main spring placing groove 2-1, and the main spring 4 is limited. Such design facilitates the connection between the main spring 4, the nut 3 and the top cover 2.

[0037] Further, the nut 3 is cylindrical and matches the outer thread 1-1 on the grinding rod 1, and is used to limit the position of one end of the main spring 4. This design makes the connection between the grinding rod 1 and the nut 3 more compact, and facilitates disassembly. The nut 3 provides a guide for the axial movement of the top cover 2 of the grinding rod, and can fix the main spring 4 to prevent jumping, thereby ensuring the stability and repeatability of the assembly precision during frequent and rapid replacement.

[0038] Further, a gasket 8 is placed on the annular flange, and is used to limit the position of one end of the secondary spring 9. The other end of the secondary spring 9 is limited by the bolt 10 screwed on the grinding rod 1, and a washer 1-4 is placed between the two.

[0039] Further, a chamfer is formed on the outer side wall of the left end of the grinding rod 1. This design makes the connection between the grinding rod 1 and the spring collet more compact.

[0040] Example 2 Referring to the accompanying drawings, Figures 1-8 The application provides a method for using an inner-tightening grinding rod for hardening inner spline vibration grinding, which comprises the following steps: Assembling the grinding rod into a shape; The installation end of the grinding rod 1 is connected and fixed by the ER spring collet and the machine tool; The top cover 2 is pulled along the axial direction by hand, at this time, the wedge-shaped inner spline teeth 5 shrink to the center under the elastic force of the secondary spring 9, and the radial size of the grinding rod is reduced; The height of the machine tool spindle is lowered, and the grinding rod is inserted into the inner spline; Then, the hand is released, and the grinding process is started. Thus, the purpose of the application is achieved.

[0041] The above is only a specific embodiment of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A hardening inner spline vibration lapping with inner expansion lapping stick, characterized in that, It comprises: a bottom cover designed as a flange, with a ring-shaped flange on its inner wall, and a sub-spring placed in it; a top cover designed as a sleeve, with a main spring placed in it; a wedge-shaped internal spline tooth slot column designed as a sleeve, with one end thick and one end thin, and a plurality of clamping grooves evenly distributed on its circumferential surface; a wedge-shaped internal spline tooth with one end thick and one end thin, and two opposite clamping teeth on its lower surface matching the clamping grooves; a grinding rod, the wedge-shaped internal spline tooth slot column is clamped on the grinding rod, the wedge-shaped internal spline tooth is inserted into the wedge-shaped internal spline tooth slot column, the bottom cover and the top cover are respectively installed at both ends of the wedge-shaped internal spline tooth slot column, the main spring is limited by a nut, and the sub-spring is limited by a bolt.

2. The hardened inner spline vibration lapping with inner expanding lapping stick according to claim 1, characterized in that, The wedge-shaped internal spline tooth slot column and the wedge-shaped internal spline tooth are adapted to each other, and the outer circle diameter remains consistent after being connected with each other.

3. The hardened inner spline vibration lapping with inner expanding lapping stick according to claim 2, characterized in that, The cross section of the clamping groove is "convex", one clamping tooth occupies half of the clamping groove, and the two opposite clamping teeth form a slot.

4. The hardened inner spline vibration lapping with inner expanding lapping stick according to claim 3, characterized in that, A first recess is formed on the inner wall of the wedge-shaped internal spline tooth slot column, and a first protruding clamping platform matching the recess is arranged on the grinding rod.

5. The hardened inner spline vibration lapping with inner expanding lapping stick according to claim 4, characterized in that, A second protruding clamping platform is arranged on the inner wall of the ring-shaped flange, and a second recess matching the second protruding clamping platform is arranged on the grinding rod; the bottom cover is clamped on the grinding rod.

6. The hardened inner spline vibration lapping with inner expanding lapping stick according to claim 5, characterized in that, A gear is further arranged on the bottom cover, the number of the gear is consistent with the wedge-shaped internal spline tooth, the maximum outer diameter of the bottom cover is greater than the maximum outer diameter of the wedge-shaped internal spline tooth slot column, and less than the outer circle diameter of the wedge-shaped internal spline tooth slot column and the wedge-shaped internal spline tooth after being connected with each other.

7. The hardened inner spline vibration lapping with inner expanding lapping stick according to claim 6, characterized in that, The top cover comprises a barrel and a barrel cover, the barrel cover is designed as a ring, the diameter of the barrel is greater than the inner diameter of the barrel cover and less than the outer diameter of the barrel cover, and the outer diameter of the barrel cover is greater than the minimum outer diameter of the wedge-shaped internal spline tooth slot column; A set of rings is extended out from the inner wall of the barrel cover in the direction of the barrel, and the set of rings, the barrel and the barrel cover jointly form a main spring placing groove.

8. The hardened inner spline vibration lapping with inner expanding lapping stick according to claim 7, characterized in that, The nut is cylindrical and matches the external thread on the grinding rod, and is used for limiting one end of the main spring.

9. The hardened inner spline vibration lapping with inner expanding lapping stick according to claim 8, characterized in that, A gasket is further arranged on the ring-shaped flange, and is used for limiting one end of the sub-spring, the other end of the sub-spring is limited by the bolt tightened on the grinding rod, and a washer is arranged between the two.

10. A method of using a hardening inner spline vibration lapping with an inner expanding lapping stick, characterized in that, It comprises the following steps: assemble the grinding rod; connect and fix the grinding rod installation end through the ER spring collet and the machine tool; hold the top cover by hand and pull it in the axial direction, at this time the wedge-shaped internal spline tooth shrinks to the center under the elastic force of the sub-spring, and the radial dimension of the grinding rod is reduced; lower the height of the machine tool spindle, and stretch the grinding rod into the internal spline; then release the hand, and start grinding processing.

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