Titanium alloy connecting piece polishing device for aviation and processing technology thereof

Abstract

The application relates to the technical field of polishing equipment, and particularly discloses a titanium alloy connecting piece polishing device for aviation and a processing technology thereof; the device comprises a positioning assembly, a power assembly, a supporting roller mechanism and a tensioning mechanism; the positioning assembly is used for horizontally placing and clamping the connecting piece and axially positioning the connecting piece; the power assembly comprises a driving end and a driven end which can be horizontally and relatively inserted and matched; the supporting roller mechanism is assembled on the driving end, and the tensioning mechanism is assembled on the driven end; the polishing device can be used for rough polishing the inner wall of a large-size titanium alloy porous shaft sleeve for aviation, can improve the polishing quality of the rough polishing of the inner wall of the porous shaft sleeve, can fully utilize polishing consumables, and can greatly reduce the replacement and use cost of the polishing consumables.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and specifically proposes a grinding device for titanium alloy connectors used in aviation and its processing technology. Background Technology

[0002] Titanium alloy porous bushings for aviation are key connecting components widely used in the aviation field. They are mainly used in critical parts such as aircraft engines, landing gear, and wings to withstand high speeds and high loads, and have multiple properties such as self-lubrication, good heat dissipation, vibration reduction, and wear resistance. Titanium alloy porous bushings are generally manufactured using powder metallurgy. In the aviation field, porous bushings usually have higher requirements for surface and dimensional accuracy. After manufacturing, porous bushings, especially the inner wall, generally require multiple steps of rough grinding, fine grinding, and polishing. Rough grinding is used to remove surface defects and adjust dimensional accuracy.

[0003] In this invention, the multi-hole bushing is a large-sized bushing. When rough grinding the inner wall of the large-sized multi-hole bushing, a large-sized flap wheel grinding head of the corresponding size is often used for grinding the inner wall. Although grinding is convenient and relatively efficient, the following problems still exist.

[0004] (1) The flap wheel grinding head uses radial sandpaper blades to grind the inner wall of the porous bushing. The blades are naturally attached to the inner wall, and the grinding force and grinding depth are uncontrollable, which can easily cause the grinding head to jump, affecting the grinding state, resulting in poor grinding uniformity, and the inner wall is prone to grinding marks and poor roundness.

[0005] (2) The flap wheel grinding head is a disposable consumable. The flap wheel grinding head only uses the end of the sandpaper blade for grinding contact. The abrasive is easily worn out quickly, and the grinding head is frequently replaced. Although some use a combination of replaceable flap wheel sleeve and cylindrical base, the overall utilization rate of sandpaper is low, the consumable is frequently replaced, and the cost of use is high. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a grinding device and processing technology for titanium alloy connectors used in aviation, which solves the problems mentioned in the background art.

[0007] A grinding device for aerospace titanium alloy connectors grinds the inner wall of cylindrical titanium alloy connectors using a grinding belt. The device includes a positioning assembly, a power assembly, a support roller mechanism, and a tensioning mechanism. The positioning assembly clamps the connector horizontally and positions it axially. The power assembly includes a drive end and a driven end capable of horizontally engaging. A clutch assembly is installed between the drive end and the driven end to switch between engaging and disengaging states. When the drive end and the driven end are engaged, the drive end drives the driven end to rotate synchronously. The support roller mechanism is mounted on the drive end. It includes multiple floating rollers circumferentially distributed around the central axis of the drive end, and the multiple floating rollers can be independently slidably adjusted in the rotational radial direction of the drive end to adjust the grinding contact force; the tensioning mechanism is assembled on the driven end, including multiple tensioning rollers distributed circumferentially alternately with the multiple floating rollers, and the multiple tensioning rollers can be synchronously moved and adjusted in the rotational radial direction of the driven end; the multiple floating rollers are used to synchronously support the grinding belt, and the multiple tensioning rollers are used to synchronously tension the grinding belt; during grinding, the floating rollers drive the grinding belt to float and adhere to the inner wall of the connector, and the floating rollers and tensioning rollers can cooperate to drive the grinding belt to move to adjust the grinding contact surface of the grinding belt.

[0008] Preferably, the drive end includes a first guide plate and a socket fixed on the first guide plate, and multiple floating rollers are slidably mounted on the first guide plate; the support roller mechanism also includes multiple first drive components that are connected one-to-one with the multiple floating rollers, and the multiple first drive components are jointly fixed on the socket; the first drive component is used to drive the corresponding floating roller to slide.

[0009] Preferably, the driven end includes a driven shaft that is horizontally rotatably mounted on the clutch assembly and a plug bracket fixed to one end of the driven shaft; the plug bracket and the plug socket are horizontally plugged into each other.

[0010] Preferably, the tensioning mechanism further includes a second drive component mounted on the plug-in frame; multiple tensioning rollers are slidably mounted on the plug-in frame and are connected to the second drive component, and the second drive component drives the multiple tensioning rollers to slide synchronously.

[0011] Preferably, the floating roller includes a sliding beam slidably mounted on a first guide plate, a roller seat slidably mounted on the sliding beam along its sliding direction, the roller seat and the sliding beam being elastically connected, and an inner support roller being horizontally rotatably mounted on the roller seat; the sliding beam is connected to a first drive component.

[0012] Preferably, the clutch assembly includes a sliding bearing seat that slides axially along the driven shaft, a brake fixed on the sliding bearing seat, the driven shaft passing through and fixed on the rotating part of the brake and horizontally rotatably mounted on the sliding bearing seat; one end of the tension roller is equipped with a main shaft seat, and the other end is axially slidably mounted with an electromagnetic shaft seat; the main shaft seat is slidably mounted on the plug-in frame and connected to the second drive component, and the electromagnetic shaft seat is slidably mounted on the first guide plate; when the plug-in frame slides out of the plug-in seat, one end of the tension roller is pulled out from the electromagnetic shaft seat accordingly.

[0013] Preferably, the positioning assembly includes a positioning clamping component and two drive rollers. The two drive rollers are symmetrically distributed on both sides of the central shaft of the drive end and are horizontally rotatably mounted via bearings with seats. The positioning clamping component is used to press down and clamp the connecting piece onto the two drive rollers and to limit its axial movement.

[0014] Preferably, the second driving component includes a driving disk that is horizontally rotated and mounted on the plug frame. The driving disk has multiple transmission holes that correspond to and cooperate with multiple tension rollers. Each tension roller has a pin block fixed on its main shaft seat, and the pin block slides along the corresponding transmission hole.

[0015] Preferably, a pressure sensor is installed on the surface of the inner support roller.

[0016] In addition, the present invention also provides a processing technology for a grinding device for titanium alloy connectors for aviation, which specifically includes the following steps: S1, the driving end and the driven end are in a separated state, and the grinding belt is fitted onto multiple inner support rollers.

[0017] S2. Place the connector horizontally and clamp it onto the positioning assembly. The grinding belt passes through the connector.

[0018] S3. Switch the drive end and the driven end to the plug-in engagement state through the clutch component.

[0019] S4. Tensile the grinding belt through the tensioning mechanism, and expand the grinding belt to fit tightly against the inner wall of the connector through the support roller mechanism, and adjust the grinding contact force of multiple floating rollers to be consistent.

[0020] S5. The driving end drives the driven end to rotate synchronously, and drives the grinding belt to grind the inner wall of the connector.

[0021] S6. During polishing, intermittently move the polishing belt to adjust the polishing contact surface.

[0022] S7. After grinding, separate the drive end and the driven end, loosen the positioning assembly, and remove the connecting parts.

[0023] The above technical solution has the following advantages or beneficial effects: This invention provides a grinding device for aerospace titanium alloy connectors, specifically for rough grinding of the inner wall of large-sized aerospace titanium alloy porous bushings. It employs a support roller mechanism and a tensioning mechanism as the base for tensioning and supporting the grinding belt. The support roller mechanism and tensioning mechanism are respectively assembled on the drive end and driven end of the power assembly, with the drive end and driven end using a positioning plug-in fit. This plug-in fit allows the base, along with the grinding belt, to achieve double-end supported rotational grinding, avoiding the problem of easy jumping when a large grinding head rotates on a single axis, enhancing the overall stability of the grinding process. The detachable structure does not affect the replacement of the grinding belt or the unloading of the porous bushing; the grinding belt and the bushing... The mounting kit can replace the existing large flap wheel grinding head. Through the independent adjustment of multiple floating rollers in the support roller mechanism, the grinding contact force can be controlled and reasonable, and radial feed grinding can be performed, which enhances the uniformity of grinding force distribution. It changes the problems of uncontrollable grinding force and grinding depth, and poor grinding uniformity that exist when using flap wheel grinding heads, reduces grinding marks and improves grinding roundness. In addition, the cooperation between the support roller mechanism and the tensioning mechanism can intermittently drive the grinding belt to move, which can make full use of abrasive. In summary, the grinding device provided by the present invention can improve the grinding quality of coarse grinding of the inner wall of multi-hole bushings, make full use of grinding consumables, and significantly reduce the replacement and use cost of grinding consumables. Attached Figure Description

[0024] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the spirit of the invention.

[0025] Figure 1 This is a three-dimensional structural diagram of a grinding device for titanium alloy connectors used in aviation.

[0026] Figure 2 This is a top view of a grinding device for titanium alloy connectors used in aviation, in operation.

[0027] Figure 3 yes Figure 2 Sectional view of AA.

[0028] Figure 4 It is a three-dimensional structural diagram of the support roller mechanism and tensioning mechanism assembled with the powertrain in a plug-in fit state.

[0029] Figure 5 It is a three-dimensional structural diagram of the assembly of the support roller mechanism and the drive end (excluding the power motor).

[0030] Figure 6 This is a three-dimensional structural diagram of the socket and the first guide plate assembly.

[0031] Figure 7 This is a three-dimensional structural diagram of the assembly of the No. 1 drive component and the floating roller.

[0032] Figure 8 It is a three-dimensional sectional view of the tensioning mechanism assembled with the No. 1 guide plate, the socket seat, and the connector frame.

[0033] Figure 9 It is a three-dimensional sectional view of the tensioning mechanism and the plug-in bracket assembly.

[0034] Figure 10 This is a three-dimensional structural diagram of the positioning and pressing component.

[0035] Figure 11 This is a three-dimensional structural diagram of a multi-hole bushing.

[0036] Figure 12 This is a three-dimensional machining diagram of a grinding device for titanium alloy connectors used in aerospace, used for grinding multi-hole bushings.

[0037] Figure 13 This is a process flow diagram of a grinding device for titanium alloy connectors used in aviation.

[0038] In the diagram: 1. Base; 11. Drive roller; 2. Powertrain; 21. Power motor; 22. Guide plate No. 1; 23. Insertion socket; 231. Insertion shaft; 24. Sliding bearing seat; 241. Brake; 25. Driven shaft; 26. Insertion frame; 261. Connecting cylinder; 262. Motor frame; 263. Guide plate No. 2; 264. Insertion rod; 3. Support roller mechanism; 31. Drive component No. 1; 311. Electric push rod; 312. Connecting rod; 32. Floating roller; 321. Sliding... 322. Moving beam; 323. Roller seat; 324. Spring; 325. Inner support roller; 4. Tensioning mechanism; 41. Tensioning roller; 411. Main shaft seat; 412. Pin block; 413. Electromagnetic shaft seat; 42. Second drive component; 421. Drive motor; 422. Drive disc; 423. Transmission hole; 5. Positioning pressure component; 51. Frame; 52. Electric cylinder; 53. Pressure roller seat; 54. Positioning pressure roller; 55. Auxiliary pressure roller; 6. Multi-hole bushing; 61. Positioning groove; 7. Grinding belt. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 11 and Figure 12 As shown, a grinding device for aerospace titanium alloy connectors is disclosed. In this invention, the aerospace titanium alloy connector (hereinafter referred to as the connector) specifically refers to... Figure 11 The porous bushing 6 shown is also called a self-lubricating bushing. The grinding device for titanium alloy connectors in aerospace is used to rough grind the inner wall of the porous bushing 6. It should be emphasized that the porous bushing 6 has a regular cylindrical structure. This device is not limited to grinding only the porous bushing 6, but is applicable to various workpieces with cylindrical structures within the corresponding diameter range.

[0042] like Figure 1 and Figure 2 As shown, the grinding device for titanium alloy connectors used in aviation includes a base 1, a positioning assembly, a power assembly 2, a support roller mechanism 3, and a tensioning mechanism 4. The positioning assembly is used for horizontally placing and clamping the multi-hole bushing 6 and for axial positioning. In this embodiment, the positioning assembly includes a positioning pressure member 5 and two drive rollers 11. The two drive rollers 11 are arranged in parallel and are both horizontally rotatably mounted on the base 1 via two seated bearings. One drive roller 11 is driven by a motor as the active roller, and the other drive roller 11 is driven by the passive roller. The two drive rollers 11 can be synchronously transmitted through a belt. The power configuration of the two drive rollers 11 is a conventional configuration and is not shown in the attached drawings.

[0043] like Figure 1 , Figure 3 and Figure 10 As shown, the positioning pressure component 5 includes a frame 51, an electric cylinder 52, a pressure roller seat 53, a positioning pressure roller 54, and two sets of auxiliary pressure rollers 55. The frame 51 is bolted between bearings with mounting seats that have two drive push rollers. The electric cylinder 52 is bolted vertically to the top of the frame 51. The pressure roller seat 53 is bolted to the bottom of the output rod of the electric cylinder 52. The positioning pressure roller 54 and the two sets of auxiliary pressure rollers 55 are all horizontally rotatably mounted on the pressure roller seat 53. The positioning pressure roller 54 is centrally positioned above the two drive support rollers 11. Two sets of auxiliary pressure rollers 55 are symmetrically distributed on both sides of the positioning pressure roller 54 in a horizontal direction perpendicular to the axial direction of the drive roller 11. Each set of auxiliary pressure rollers 55 consists of two rollers, and the two rollers in each set are distributed along the axial direction of the drive roller 11. The positioning pressure roller 54 is used to axially position the porous bushing 6. The outer wall of the porous bushing 6 is provided with a positioning groove 61 with a circumferential structure for assembly positioning. The axial width of the positioning pressure roller 54 is slightly smaller than the width of the positioning groove 61, so that the positioning pressure roller 54 can extend into the positioning groove 61.

[0044] During actual grinding, the perforated bushing 6 is placed horizontally between the two drive rollers 11, and the position of the perforated bushing 6 is adjusted so that the positioning groove 61 is directly below the positioning pressure roller 54. Of course, based on the actual size of the perforated bushing 6, a positioning reference line can be marked on the roller surface of the drive roller 11. When reloading, the end of the perforated bushing 6 is aligned with the positioning reference line. Subsequently, the electric cylinder 52 is started to drive the pressure roller seat 53 to descend, so that the positioning pressure roller 54 extends into the positioning groove 61 to complete the axial positioning of the perforated bushing 6. At the same time, the two sets of auxiliary pressure rollers 55 are pressed against the outer wall of the perforated bushing 6 to ensure the stability of the placement and rotation of the perforated bushing 6.

[0045] In a preferred embodiment of the present invention, the positioning assembly includes a drive roller 11 for driving the porous bushing 6 to achieve active rotation and grinding, resulting in a better grinding effect. The porous bushing 6 can also be ground in a fixed position. In another embodiment of the present invention, the two drive rollers 11 are replaced by a support block with a V-groove on its top surface. The porous bushing 6 can be placed horizontally in the V-groove of the support block. Furthermore, a positioning strip that protrudes relative to the groove surface can be provided in the V-groove to replace the positioning pressure roller 54 for axial positioning of the porous bushing 6. It should be noted that the specific structure of the other embodiment is not shown in the accompanying drawings.

[0046] like Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the powertrain 2 includes a drive end and a driven end capable of horizontally engaging with each other; a clutch assembly is installed between the drive end and the driven end to switch between relative engagement and disengagement states. Two drive rollers 11 are symmetrically distributed on both sides of the rotation center shaft of the drive end. The drive end includes a power motor 21 fixed to the base 1 by bolts. A guide plate 22 is welded to the output shaft of the power motor 21. The guide plate 22 has a square disk structure. A socket seat 23 is fixed to the center of the disk surface facing away from the output shaft of the power motor 21 by bolts. The socket seat 23 is provided with four socket shafts 231 evenly distributed around the central axis of the guide plate 22. Circular sockets are opened on the socket shafts 231 extending axially from the end away from the guide plate 22. Driven by the power motor 21, the guide plate 22 and the socket seat 23 can be rotated horizontally as a whole.

[0047] like Figure 1 , Figure 2 , Figure 4 , Figure 8 and Figure 9As shown, the clutch assembly includes a sliding bearing seat 24 that is horizontally slidably mounted on the base 1 along the axial direction of the first guide plate 22. The base 1 can be equipped with any power device capable of linear drive, including electric cylinders, hydraulic cylinders, and pneumatic cylinders, and the sliding bearing seat 24 is fixed to the output end of the selected power device. The selected power device is used to drive the sliding bearing seat 24 to slide horizontally. The driven end includes a driven shaft 25 that is horizontally rotatably mounted on a sliding bearing seat 24 via a bearing. The driven shaft 25 is coaxially arranged with the output shaft of the power motor 21. A plug-in bracket 26 that can be plugged into the plug-in seat 23 is mounted on the driven shaft 25. The plug-in bracket 26 is arranged close to the plug-in seat 23. The plug-in bracket 26 includes a connecting cylinder 261, a motor frame 262, a second guide plate 263, and four plug rods 264 that are sequentially fixed along the axial direction of the driven shaft 25 by bolts or screws. The connecting cylinder 261 is fixedly connected to the driven shaft 25 by a flange. The second guide plate 263 has a square disk structure and is coaxially arranged with the first guide plate 22. The four plug rods 264 are horizontally aligned with the four plug-in shafts 231. When the sliding bearing seat 24 drives the entire driven end to move closer to the driving end, the four plug rods 264 can be plugged into the plug holes of the four plug-in shafts 231 one by one. To ensure proper alignment between the drive and driven ends, in this embodiment, the power motor 21 is a conventional brake motor with a built-in braking structure. Additionally, a brake 241 is fixed to the sliding bearing housing 24 by screws. The brake 241 can be a conventional electromagnetic brake, hydraulic brake, or pneumatic brake. In this embodiment, to ensure the corresponding speed, an electromagnetic brake 241 is preferred. The driven shaft 25 is fixed along the center of the rotating part of the brake 241. The power motor 21 can brake the drive end through its own braking, and the brake 241 can brake the driven end. To ensure synchronous braking response, the brake 241 and the power motor 21 can be started synchronously via the same switch, and both are self-locking upon power failure. That is, after the power motor 21 is turned off, the brake 241 responds synchronously, and the drive and driven ends synchronously lock their positions to ensure the fixed alignment state after separation.

[0048] In this invention, such as Figure 1 As shown, the consumable used for polishing is a polishing belt 7, which is essentially sandpaper. The polishing belt 7 has a cylindrical belt structure to facilitate the cooperation between the support roller mechanism 3 and the tensioning mechanism 4 to achieve tension support for the polishing belt 7. The polishing belt 7 can be directly customized and produced on the market. The polishing belt 7 consists of a base layer and an abrasive layer. The base layer is preferably made of rubber plus a composite rubber material made of nylon or polyester fiber fabric to meet the requirements of flexibility and fit. Ordinary fabric can also be used as the base layer. The abrasive layer can be selected with different grit sizes.

[0049] like Figure 1 and Figure 4As shown, in this invention, the support roller mechanism 3 is mounted on the driving end, and the tensioning mechanism 4 is mounted on the driven end. The support roller mechanism 3 and the tensioning mechanism 4 together constitute a set base for tensioning and supporting the grinding belt 7, and cooperate with the power assembly 2 to drive the set base to rotate to achieve rotary grinding. It is necessary to ensure that when the perforated bushing 6 is placed between the two driving rollers 11, the output shaft of the power motor 21 and the perforated bushing 6 are in a coaxial state. In order to adapt the device provided by this invention to grind cylindrical connecting parts of different diameters, an adjustable mounting platform can be further mounted on the base 1, and the two driving rollers 11 can be mounted on the platform.

[0050] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 11As shown, the support roller mechanism 3 includes four floating rollers 32, which are distributed around the insertion seat 23 and evenly distributed around the central axis of the first guide plate 22. Each floating roller 32 includes a sliding beam 321, on which a roller seat 322 is slidably mounted. The roller seat 322 is slidably engaged with the sliding beam 321 via two welded sliding blocks. Two springs 323 are welded between the sliding beam 321 and the roller seat 322. An inner support roller 324 is horizontally rotatably mounted on the roller seat 322. The first guide plate 22 has four grooves evenly distributed around its central axis to engage with the four floating rollers 32. These grooves are designed to improve the performance of the floating rollers 32 during grinding. To improve stability, the second guide plate 263 also has four grooves around the central axis that cooperate with the four floating rollers 32. The sliding guidance direction of the grooves on the first guide plate 22 and the second guide plate 263 is set along the rotational radial direction. The difference is that the groove of the first guide plate 22 is a T-shaped structure, while the groove of the second guide plate 263 is a straight structure. One end of the sliding beam 321 is slidably installed in the groove of the first guide plate 22. When the driving end and the driven end are fully engaged, the other end of the sliding beam 321 is inserted into the corresponding groove on the second guide plate 263, thereby improving stability without causing separation interference. In this invention, the four floating rollers 32 are independently adjustable and controlled. The support roller mechanism 3 also includes four first drive members 31 that are connected one-to-one with the four floating rollers 32. The four first drive members 31 and the four insertion shafts 231 are evenly distributed in the circumferential direction. The first drive member 31 includes an electric push rod 311 that is horizontally fixed to the insertion seat 23 by bolts and a connecting rod 312 that is hinged to the output end of the electric push rod 311. The other end of the connecting rod 312 is hinged to the end of the sliding beam 321 away from the first guide plate 22. When the output end of the electric push rod 311 extends, the floating roller 32 can be pushed to slide in a direction away from the center of the first guide plate 22 through the connecting rod 312. During operation, the inner support roller 324 is used to open the grinding belt 7, so that the abrasive surface of the grinding belt 7 contacts the inner wall of the porous bushing 6. By moving the inner support roller 324, the grinding force between the grinding belt 7 and the inner wall of the porous bushing 6 can be adjusted. In order to monitor and provide feedback on the grinding force in a timely manner, the inner support roller 324 is also equipped with a pressure sensor (not shown in the figure). This pressure sensor is an existing thin-film pressure sensor, and the metal sheet of the pressure sensor is distributed around the surface of the inner support roller 324. It should be emphasized that the signal acquisition and collection of the pressure sensor is existing technology and will not be described in detail here. In addition, in order to limit the grinding belt 7 in the axial direction of the inner support roller 324, the inner support surface of the inner support roller 324 is a grooved surface.

[0051] Excessive grinding contact force can easily lead to over-grinding and create obvious grinding marks, affecting grinding accuracy. Conversely, insufficient contact force can affect effective contact, resulting in incomplete grinding and prolonged grinding time. Therefore, when actually grinding the multi-hole bushing 6, a relatively appropriate grinding contact force can be selected based on the overall quality of the inner wall surface of the multi-hole bushing 6 and the required dimensional allowance for grinding. In this invention, the four inner support rollers 324 can be moved and adjusted independently. The contact force at the corresponding inner support roller 324 can be obtained in real time through pressure sensors, thereby uniformly adjusting the contact force of each inner support roller 324 to a suitable state; floating The roller 32 adopts a floating design in the grinding contact direction, so as to maintain an adaptive slight floating when in contact with the relative concave and convex points of the inner wall of the porous bushing 6. In addition, due to the linear mechanical characteristics of the spring 323, a spring 323 with relatively small stiffness but which can ensure the inner support strength of the inner support roller 324 can be selected. This makes the force fluctuation of the relatively appropriate contact force small under the slight floating distance, and keeps it within a reasonable range of variation. This ensures the uniformity of the contact force distribution of the four inner support rollers 324 on the inner wall of the porous bushing 6, suppresses circular runout, enhances the stability of grinding, reduces grinding marks, and improves the roundness of grinding.

[0052] like Figure 3 , Figure 4 , Figure 8 and Figure 9As shown, the tensioning mechanism 4 includes four tensioning rollers 41 evenly distributed in the circumferential direction, which are the same as the four floating rollers 32. In this embodiment, the tensioning rollers 41 are existing electric rollers, which are roller devices with built-in motors that drive the rotating drum to rotate. A main shaft seat 411 is fixedly installed at one end of the tensioning roller 41. The second guide plate 263 has four grooves on its surface facing the drive end, which correspond one-to-one with the four tensioning rollers 41. The main shaft seat 411 is slidably installed in the corresponding grooves, and the main shaft seat 411 is slidably installed along the rotation path of the second guide plate 263. The tension roller 41 slides along the axial direction; an electromagnetic shaft seat 413 is slidably mounted on the other end of the tension roller 41. The electromagnetic shaft seat 413 is slidably mounted on the first guide plate 22 along the rotational radial direction of the first guide plate 22. One end of the tension roller 41 is slidably inserted into the electromagnetic shaft seat 413, so that when the driving end and the driven end are separated, the end of the tension roller 41 can be separated from the electromagnetic shaft seat 413. In addition, in order to ensure that the end of the tension roller 41 and the electromagnetic shaft seat 413 can maintain the alignment state after separation, an electromagnet is built into the electromagnetic shaft seat 413. After being powered on, the electromagnetic shaft seat 413 is magnetically attracted and fixed to the first guide plate 22 by an electromagnet. A copper sleeve is built into the insertion hole on the electromagnetic shaft seat 413 that engages with the end of the tension roller 41. The copper sleeve is a non-magnetic metal with good magnetic isolation, allowing the end of the tension roller 41 to normally separate from the electromagnetic shaft seat 413 after it is fixed. Alternatively, the end of the tension roller 41 can also be made of a non-magnetic material that slides with the electromagnetic shaft seat 413. The tensioning mechanism 4 also includes a second drive mounted on the insertion bracket 26. Part 42; The second drive component 42 includes a drive motor 421 that is horizontally fixed to the motor frame 262 by bolts and a drive disk 422 fixed to the output shaft of the drive motor 421. The drive disk 422 is horizontally rotatably mounted on the second guide disk 263 by bearings. The drive disk 422 has four transmission holes 423 evenly distributed around it. A pin block 412 is welded on the main shaft seat 411 of each tension roller 41. The pin block 412 passes through the second guide disk 263 and slides along the corresponding transmission hole 423.

[0053] In addition, such as Figures 1 to 13 As shown, the present invention also provides a processing technology for a grinding device for titanium alloy connectors used in aviation, specifically including the following steps: S1, with the driving end and the driven end in a separated state, the grinding belt 7 is fitted onto multiple inner support rollers 324. Specifically, the driven end is separated from the driving end by a clutch assembly, and then the grinding belt 7 is fitted onto four inner support rollers 324, such that the grinding belt 7 is located within the groove surface of the inner support rollers 324.

[0054] S2. The perforated bushing 6 is placed horizontally and clamped onto the positioning assembly, with the grinding belt 7 passing through the connector. Specifically, the perforated bushing 6 is placed horizontally between the two drive rollers 11, so that the grinding belt 7 passes through the perforated bushing 6. The perforated bushing 6 is circumferentially clamped by two sets of auxiliary pressure rollers 55 cooperating with the two drive rollers 11, and axially limited by the positioning pressure roller 54.

[0055] S3. The drive end and the driven end are switched to the insertion engagement state through the clutch assembly; the four tension rollers 41 then extend into the multi-hole bushing 6, and the shaft ends of the tension rollers 41 and the electromagnetic shaft seat 413 are synchronously inserted.

[0056] S4. The grinding belt 7 is tensioned by the tensioning mechanism 4, and the grinding belt 7 is stretched open by the support roller mechanism 3 until it is pressed tightly against the inner wall of the connector. The grinding contact force of the multiple floating rollers 32 is adjusted to be consistent. Specifically, the four first drive units 31 can be started first, and the grinding belt 7 is pressed against the inner wall of the multi-hole bushing 6 by the inner support rollers 324 to complete the initial pressing. Then, driven by the second drive unit 42, the four tension rollers 41 are driven to slide synchronously towards the center of the second guide plate 263. The tension rollers 41 are pressed against the abrasive surface of the grinding belt 7, so that the grinding belt 7 is in a tensioned state. At this time, according to the contact pressure value obtained by the pressure sensor on each inner support roller 324, each floating roller 32 is moved and finely adjusted independently to adjust the values ​​of the four pressure sensors to be consistent, and the pressure is basically equal to the set appropriate contact force.

[0057] S5. The driving end drives the driven end to rotate synchronously, and drives the grinding belt 7 to grind the inner wall of the connector. In addition, the two driving rollers 11 simultaneously drive the perforated bushing 6 to rotate.

[0058] S6. During grinding, the grinding belt 7 is moved intermittently to adjust the grinding contact surface. Specifically, as grinding progresses, the abrasive in the area where the grinding belt 7 is held by the inner support roller 324 will gradually wear down. At this time, in order to avoid the grinding contact force affecting the movement of the grinding belt 7, the four first drive components 31 can be started synchronously, so that the four sliding beams 321 move synchronously and slightly towards the center of the first guide plate 22 to reduce the grinding contact force. Subsequently, the four tension rollers 41 are started synchronously and drive the grinding belt 7 to move, adjusting the grinding contact surface of the grinding belt 7. The above process is intermittent, and the start interval time can be reasonably set according to the actual consumption rate of the abrasive on the grinding belt 7. Through several intermittent movements, the entire abrasive surface of the grinding belt 7 can be fully utilized, greatly improving the utilization rate of the abrasive. In addition, if the dimensional allowance to be removed during the rough grinding of the porous bushing 6 is relatively large, the real-time contact pressure fed back from the pressure sensor will gradually decrease as the allowance is removed during grinding. At this time, the movable floating roller 32 will replenish the pressure value to the initial value to achieve radial feed grinding.

[0059] S7. After grinding, separate the drive end and the driven end, loosen the positioning assembly, and remove the multi-hole bushing 6.

[0060] This invention provides a grinding device for aerospace titanium alloy connectors, specifically for rough grinding of the inner wall of large-sized aerospace titanium alloy porous bushings 6. A support roller mechanism 3 and a tensioning mechanism 4 are used as the base for tensioning and supporting the grinding belt 7. The support roller mechanism 3 and the tensioning mechanism 4 are respectively mounted on the drive end and driven end of the power assembly 2, with the drive end and driven end using a positioning plug-in connection. This plug-in connection allows the base and grinding belt 7 to achieve double-end supported rotational grinding, avoiding the problem of easy jumping when large grinding heads rotate on a single axis, enhancing the overall stability of the grinding process. The detachable structure does not affect the replacement of the grinding belt 7 or the unloading of the porous bushing 6. The grinding belt 7 and the base are fitted together... This invention can replace existing large-sized flapper grinding heads. Through the independent adjustment of multiple floating rollers 32 in the support roller mechanism 3, it ensures controllable and reasonable grinding contact force and enables radial feed grinding, thereby enhancing the uniformity of grinding force distribution. It solves the problems of uncontrollable grinding force and depth, and poor grinding uniformity that exist when using flapper grinding heads, reducing grinding marks and improving grinding roundness. In addition, the cooperation between the support roller mechanism 3 and the tensioning mechanism 4 can intermittently drive the grinding belt 7 to move, making full use of the abrasive. In summary, the grinding device provided by this invention can improve the grinding quality of coarse grinding of the inner wall of the multi-hole bushing 6, make full use of grinding consumables, and significantly reduce the replacement and use cost of grinding consumables.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0063] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A grinding device for titanium alloy connectors used in aviation, comprising grinding the inner wall of a cylindrical titanium alloy connector using a grinding belt, characterized in that, The device includes: The positioning assembly is used to horizontally position and clamp the connectors, as well as axially position them. The powertrain includes a drive end and a driven end that can be horizontally plugged into each other; a clutch assembly is installed between the drive end and the driven end to switch between relative plugging into each other or relative disengagement. When the drive end and the driven end are in a plugged-in state, the drive end drives the driven end to rotate synchronously. The support roller mechanism, assembled at the drive end, includes multiple floating rollers circumferentially distributed around the central axis of the drive end, and the multiple floating rollers can be independently slidably adjusted in the rotational radial direction of the drive end to adjust the grinding contact force. And a tensioning mechanism, assembled on the driven end, including multiple tensioning rollers that are alternately distributed with multiple floating rollers in the circumferential direction, the multiple tensioning rollers being able to move synchronously and adjust in the rotational radial direction of the driven end; Multiple floating rollers are used to synchronously support the grinding belt, and multiple tensioning rollers are used to synchronously tension the grinding belt. During grinding, the floating rollers drive the grinding belt to float and adhere to the inner wall of the connector. The floating rollers and tensioning rollers work together to drive the grinding belt to move and adjust the grinding contact surface of the grinding belt. The drive end includes a first guide plate and a socket fixed on the first guide plate, and multiple floating rollers are slidably mounted on the first guide plate; the support roller mechanism also includes multiple first drive components that are connected one-to-one with the multiple floating rollers, and the multiple first drive components are fixed together on the socket; the first drive component is used to drive the corresponding floating roller to slide. The driven end includes a driven shaft that is horizontally rotatably mounted on the clutch assembly and a plug bracket fixed to one end of the driven shaft; the plug bracket and the socket are horizontally plugged into each other.

2. The grinding device for titanium alloy connectors for aviation as described in claim 1, characterized in that: The tensioning mechanism also includes a second drive component mounted on the plug-in frame; multiple tension rollers are slidably mounted on the plug-in frame and are connected to the second drive component, which drives the multiple tension rollers to slide synchronously.

3. The grinding device for aerospace titanium alloy connectors according to claim 1, characterized in that: The floating roller includes a sliding beam slidably mounted on a first guide plate, a roller seat slidably mounted on the sliding beam along its sliding direction, the roller seat and the sliding beam being elastically connected, and an inner support roller being horizontally rotatably mounted on the roller seat; the sliding beam is connected to a first drive component.

4. The grinding device for aerospace titanium alloy connectors according to claim 2, characterized in that: The clutch assembly includes a sliding bearing seat that slides axially along the driven shaft, a brake that is fixed on the sliding bearing seat, and the driven shaft that passes through and is fixed to the rotating part of the brake and is horizontally rotatably mounted on the sliding bearing seat. One end of the tension roller is equipped with a main shaft seat, and the other end is axially slidably mounted with an electromagnetic shaft seat. The main shaft seat is slidably mounted on the plug-in frame and connected to the second drive component, and the electromagnetic shaft seat is slidably mounted on the first guide plate. When the plug-in frame slides out of the plug-in seat, one end of the tension roller is pulled out from the electromagnetic shaft seat.

5. The grinding device for aerospace titanium alloy connectors according to claim 1, characterized in that: The positioning assembly includes a positioning clamping component and two drive rollers. The two drive rollers are symmetrically distributed on both sides of the central shaft at the drive end and are horizontally rotatable via bearing seats. The positioning clamping component is used to press and clamp the connecting piece onto the two drive rollers and to limit its axial movement.

6. The grinding device for aerospace titanium alloy connectors according to claim 4, characterized in that: The second driving component includes a driving disk that is horizontally rotated and mounted on the plug frame. The driving disk has multiple transmission holes that correspond to and cooperate with multiple tension rollers. Each tension roller has a pin block fixed on its main shaft seat, and the pin block slides along the corresponding transmission hole.

7. The grinding device for aerospace titanium alloy connectors according to claim 3, characterized in that: A pressure sensor is installed on the surface of the inner support roller.

8. A processing method for a grinding device for aerospace titanium alloy connectors, comprising using the grinding device for aerospace titanium alloy connectors as described in any one of claims 1-7 to grind the inner wall of the aerospace titanium alloy connector, characterized in that, Includes the following steps: S1. With the drive end and driven end in a separated state, the grinding belt is fitted onto multiple inner support rollers; S2. Place the connector horizontally and clamp it onto the positioning assembly, then pass the grinding belt through the connector. S3. Switch the drive end and the driven end to the plug-in engagement state through the clutch component; S4. Tensile the grinding belt through the tensioning mechanism, and expand the grinding belt to fit tightly against the inner wall of the connector through the support roller mechanism, and adjust the grinding contact force of multiple floating rollers to be consistent. S5. The driving end drives the driven end to rotate synchronously, and drives the grinding belt to grind the inner wall of the connector. S6. During polishing, intermittently move the polishing belt to adjust the polishing contact surface; S7. After grinding, separate the drive end and the driven end, loosen the positioning assembly, and remove the connecting parts.

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