Machining center rotary table zero point positioning device and application in blade tenon automatic machining

Abstract

The invention provides a machining center rotary table zero-point positioning device and application in blade tenon automatic machining. The machining center rotary table zero-point positioning device comprises a connecting plate, a fixing ring, a rotary disc, a fixing support and a quick-change chuck. The fixed ring is mounted on the periphery of the rotating disc and is fixed on a turntable base of equipment through a connecting plate; one end of the rotating disc is fixed to the end face of a rotary table of equipment, the other end of the rotating disc is connected with the fixing support, and the quick-change chuck is fixedly installed over the fixing support. In combination with the structural characteristics of the blade, during machining, one end of the device is connected with a machining center rotary table, and accurate positioning and quick remodeling between the clamp and the quick-change chuck are achieved through the design of a positioning structure and an air path. The zero-point positioning device is applied to the rough milling procedure and the finish milling procedure of the blade tenon, so that precision machining of all the procedures is completed after one-time clamping in blade tenon machining, standardized clamping and positioning are achieved, automatic loading and unloading of a robot are easy to achieve, and efficient and high-quality machining of parts is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing of compressor blades of aircraft engines, and relates to a zero-point positioning device for a machining center turntable and its application in automatic processing of blade tenons. Background Art

[0002] The structure of a certain type of aircraft engine compressor rotor blades is shown in Figure 1 The blade is mainly composed of a blade body 1, an edge plate 2 and a tenon 3. At present, in on-site processing, the blade body is usually fixed with a positioning block, and the tenon forming process is carried out through three processes: rough milling, fine grinding and fine milling. During the processing, the rough milling process uses a universal platform fixture, and the fixture is fixed on the machine tool platform through a pressure plate; the fine grinding process uses a universal quick-change fixture, and the fine milling process uses a universal turntable fixture, and the fixture base plate is fixed on the turntable by screws; among them, the main purpose of the quick-change fixture design is to quickly and easily replace the fixture to meet the processing needs of different workpieces. In the fine grinding process, since the workpiece needs to be replaced frequently for processing, the use of a universal quick-change fixture can significantly improve production efficiency. The turntable fixture is usually used in conjunction with a turntable to achieve rapid positioning and clamping of the workpiece. In the fine milling process, since multiple faces or angles of the workpiece need to be processed, the use of a universal turntable fixture can easily adjust the position of the workpiece, thereby improving processing efficiency and flexibility. In addition, the turntable fixture usually has good rigidity and stability, which helps to ensure the processing accuracy of fine milling.

[0003] In addition, quick-change fixtures usually have good positioning accuracy and clamping stability, which helps to ensure the processing quality of fine grinding. The platform fixture and turntable fixture are connected to the equipment by bolts. The clamping and alignment methods are different between the processes of the same part number. The assembly process of multiple part numbers involves multiple fixture loading and unloading, which is time-consuming, labor-intensive, and difficult to align. The original method has high labor intensity during the processing, and the consistency of the parts processing size is not strong, which cannot be applied to automated assembly line production and processing.

[0004] However, with the improvement of quality requirements and increase in output of aircraft engine blades, it is difficult to ensure the processing quality and efficiency of blades with existing traditional methods. There is an urgent need to find a process method suitable for the automated processing of blade tenons, so as to realize the transformation of rough milling, fine grinding and fine milling of blade tenons to automated, standardized and unmanned methods. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a zero-point positioning device for a machining center turntable and its application in the automated processing of blade tenons. A quick-change fixture equipped with parts is placed on the turntable zero-point device. The installation process is simple and easy, and the positioning effect is excellent, which overcomes the current situation of repeated clamping and alignment, time-consuming, labor-intensive and inefficient processing of original parts.

[0006] The present invention is achieved through the following technical solutions: A zero-point positioning device for a machining center turntable, comprising a connecting plate, a fixing ring, a rotating disk, a fixing bracket and a quick-change chuck; The fixing ring is installed on the periphery of the rotating disk, and the fixing ring is fixed on the turntable base of the equipment through a connecting plate; one end of the rotating disk is fixed to the turntable end surface of the equipment, and the other end is connected to the fixing bracket; the quick-change chuck is fixedly installed just above the fixing bracket.

[0007] Preferably, a turntable air path is provided between the rotating disk and the quick-change chuck for guiding compressed air.

[0008] Preferably, a vent hole is designed on the top of the fixing ring; the outer ring air circuit is installed in coordination with the vent hole, and the fixing ring is connected to the compressed air pipeline of the equipment through the outer ring air circuit.

[0009] Preferably, a plurality of rectangular grooves are circumferentially arranged on the rotating disk, wherein the rectangular grooves on both sides of the edge are used to install single-lip spring rotating sealing strips; and the two rectangular grooves in the middle are used to guide the gas to the fixed bracket through pipelines.

[0010] Preferably, ventilation holes are provided in the two middle rectangular grooves.

[0011] Preferably, a boss is provided on the top of the fixing ring, and the connecting plate is fixedly connected to the boss of the fixing ring by bolts.

[0012] Preferably, the connecting plate is in a T-shaped structure, one end of the connecting plate is connected to the fixing ring, and the other end of the connecting plate is connected to the base of the equipment turntable.

[0013] Preferably, the fixing ring is installed with clearance fit between the fixing ring and the rotating disk.

[0014] Preferably, a positioning pin is provided on the quick-change chuck so that the center line of the quick-change chuck is on the rotation center of the equipment turntable.

[0015] A machining center turntable zero-point positioning device is used in the automated processing of blade tenons. During processing, the machining center turntable zero-point positioning device is installed on the equipment turntable, the air source is connected, the blade tenon is installed on a quick-change fixture, and the quick-change fixture is installed on the machining center turntable zero-point positioning device, thereby performing automated processing on the blade tenon.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention proposes a turntable zero-point positioning device suitable for automatic processing of blade tenons, comprising a connecting plate, a fixing ring, a rotating disk, a fixing bracket and a quick-change chuck; the fixing ring is installed on the periphery of the rotating disk, and the fixing ring is fixed on the turntable base of the equipment through the connecting plate; one end of the rotating disk is fixed to the end face of the turntable of the equipment, and the other end is connected to the fixing bracket; the quick-change chuck is fixedly installed directly above the fixing bracket. Combined with the structural characteristics of the blade, during processing, one end of the device is connected to the turntable of the machining center, and the quick positioning chuck is vertically fixed on the fixing bracket of the device through the positioning structure and the air path design, so as to realize the precise positioning and quick changeover between the fixture and the quick positioning chuck. By applying the zero-point positioning device in the rough milling process and the fine milling process of the blade tenon, the blade tenon processing can complete the precision processing of all processes after one clamping, and the part change process and the part process between the process process can realize standardized clamping and positioning, which is easy to realize the automatic loading and unloading of the robot, thereby achieving efficient and high-quality processing of the parts. During the automated processing of blade tenons, the turntable zero-point device is installed on the turntable of the equipment, the air source is connected, and the quick-change fixture with parts is placed on the turntable zero-point device. The installation process is simple and easy, and the positioning effect is excellent, overcoming the repeated clamping and alignment, time-consuming and labor-intensive, and inefficient status quo in the original parts processing process. The application of the turntable zero-point device can realize automated assembly line production while meeting the precise clamping and positioning of parts.

[0017] Furthermore, two air vents are designed on the top of the fixed ring, which cooperate with the small gap of the rotating disk. Their main function is to guide the air source of the equipment turntable into the annular groove of the rotating disk, and to synchronously supply air to the quick-change chuck through the turntable air path.

[0018] Furthermore, a positioning pin is provided on the quick-change chuck so that the center line of the quick-change chuck is on the rotation center of the equipment turntable with an accuracy of 0.005mm, thereby realizing rapid zero-point positioning during the processing.

[0019] Furthermore, a plurality of rectangular grooves are designed on the rotating disk. The rectangular grooves on both sides are used to install single-lip spring rotating sealing strips to ensure the air tightness of the rotating disk during rotation. The two rectangular grooves in the middle lead the gas to the fixed bracket through pipeline design. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a certain type of aircraft engine blade; Figure 2 It is a schematic diagram of the quick-change fixture structure; Figure 3 It is a schematic diagram of the zero point positioning device of the machining center turntable of the present invention; Figure 4 This is a top view of the zero-point positioning device of the machining center turntable; Figure 5 This is a side view of the zero-point positioning device of the machining center turntable; Figure 6 This is a schematic diagram of the installation of the zero point positioning device and the turntable base of the machining center; Figure 7 This is a physical picture of the zero-point positioning device of the machining center turntable; Figure 8 is the front view of the rotating disk; Fig. 9 is a side view of the rotating disk; Fig.10 Schematic diagram of the fixing ring. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0022] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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 only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] The purpose of the invention is to propose a turntable zero-point positioning device suitable for the automated processing of blade tenons. Combined with the structural characteristics of the blade, one end of the device is connected to the turntable of the machining center. After the positioning structure and air path design, the quick positioning chuck is vertically fixed on the fixed bracket of the device to achieve precise positioning and rapid changeover between the fixture and the quick positioning chuck. By applying the zero-point positioning device in the rough milling process and fine milling process of the blade tenon, the blade tenon processing can complete all the precision processing processes after one clamping, and the parts change process and the processing process between parts processes can achieve standardized clamping and positioning, which is easy to realize the automated loading and unloading of robots, thereby achieving efficient and high-quality processing of parts.

[0024] The purpose of the present invention is achieved through the following steps: The structure and function of the turntable zero point positioning device are as follows: Figure 3 , Figure 4 , Figure 5 Shown below: A zero-point positioning device for a machining center turntable, comprising a connecting plate 1, a fixing ring 3, a rotating disk 4, a fixing bracket 6 and a quick-change chuck 7; The fixing ring 3 is installed on the periphery of the rotating disk 4, and the fixing ring 3 is fixed to the base of the equipment turntable through the connecting plate 1; one end of the rotating disk 4 is fixed to the end surface of the turntable of the equipment, and the other end is fixedly connected to the fixed bracket 6; the quick-change chuck 7 is fixedly installed just above the fixed bracket 6.

[0025] A turntable air path 5 is provided between the rotating disk 4 and the quick-change chuck 7 for guiding compressed air. The turntable air path 5 is used to introduce the air source from the fixed part to the rotating part through the vent joint. When the fixed ring 3 and the rotating disk are matched with a small gap, the vent joint needs to have the characteristics of high precision, low friction and good sealing performance. One end of the rotary joint is connected to the fixed ring 3, and the other end is connected to the annular groove inside the rotating disk. When the rotating disk rotates, the rotary joint can maintain the continuity of the air path to ensure that the compressed air can smoothly enter the annular groove.

[0026] The top of the fixing ring is designed with two vents; the outer ring air circuit 2 is installed in coordination with the vents, and the fixing ring 3 is connected to the equipment compressed air pipeline through the outer ring air circuit 2.

[0027] The rotating disk 4 is provided with a plurality of rectangular grooves circumferentially, wherein the rectangular grooves on both sides of the edge are used for installing the single-lip spring rotating sealing strip; the rectangular grooves in the middle are used for guiding the gas to the fixed bracket 6 through the pipeline; and the two rectangular grooves in the middle are provided with ventilation holes.

[0028] A boss is provided on the top of the fixing ring 3, and the connecting plate 1 is fixedly connected to the boss by bolts. The connecting plate 1 is a T-shaped structure, one end of the connecting plate 1 is connected to the fixing ring 3, and the other end of the connecting plate 1 is connected to the base of the equipment turntable. One end of the connecting plate 1 is fixedly connected to the turntable base by a bolt and nut assembly, and the other end is fixedly connected to the boss part of the fixing ring 3 by a bolt and nut assembly; The fixed ring 3 and the rotating disk 4 are installed with a small gap, and the fixed ring 3 and the rotating disk 4 are fitted with a small gap. Its main function is to guide the air source of the equipment turntable into the annular groove of the rotating disk, and synchronously supply air to the quick-change chuck through the turntable air path, such as Fig.10 As shown; A positioning pin is arranged on the quick-change chuck 7 so that the center line of the quick-change chuck 7 is on the rotation center of the equipment turntable with an accuracy of 0.005mm. It realizes the zero point rapid positioning during the processing and is an important component that cooperates with the quick-change fixture in the process of automated precision processing.

[0029] When a machining center turntable zero point positioning device is used in the automatic processing of blade tenons, Figure 6 and Figure 7 As shown in the figure, the turntable zero point device is installed on the turntable of the equipment, the air source is connected, and the quick-change fixture with parts is placed on the turntable zero point device. The installation process is simple and easy, and the positioning effect is excellent, which overcomes the repeated clamping and alignment in the original part processing process, which is time-consuming, labor-intensive, and inefficient. The application of the turntable zero point device can realize automated assembly line production while meeting the precise clamping and positioning of parts.

[0030] Embodiment 2, The rotor blade is composed of tenon teeth, edge plate surface and blade body. After being precisely positioned by the positioning block, the positioning block is installed on the quick-change fixture, which is composed of a standard tray, a special fixture and a chip. The quick-change fixture is placed on the quick-change chuck 7 of the turntable zero point device to achieve precise positioning of parts and multi-directional precision machining of the tenon. Figure 3 The main components include: connecting plate 1, outer ring air circuit 2, fixed ring 3, rotating disk 4, turntable air circuit 5, fixed bracket 6, quick-change chuck 7. Its main working principle is: Connecting plate 1: It is T-shaped, with one end fixed on the base of the equipment turntable and the other end connected to the fixing ring 3, which plays a supporting and positioning role for the fixing ring.

[0031] Outer ring gas circuit 2: Transfer the compressed air pipeline of the equipment to the fixed ring. The pipeline adopts plug-in quick-change connection, which is convenient and fast with good sealing performance. The outer ring gas circuit 2 is inserted into the vent hole of the fixed ring 3. Compressed air is an important driving force and power source in processing. By transferring the compressed air pipeline of the equipment to the fixed ring through the outer ring gas circuit 2, a stable and continuous compressed air supply can be provided for the rotating disk connected to the fixed ring, thereby driving the equipment to work normally.

[0032] Fixed ring 3: The fixed ring 3 is fixed to the base of the equipment turntable through the connecting plate 1. There are two vents on the top of the fixed ring. The fixed ring 3 cooperates with the rotating disk with a small gap. Its main function is to guide the air source of the equipment turntable into the annular groove of the rotating disk, and synchronously supply air to the quick-change chuck through the turntable air path. Fig.10 As shown; Rotating disk 4: One end of the rotating disk is fixed to the end face of the equipment turntable by a hexagon socket screw, and rotates synchronously with the equipment turntable, while driving the fixed bracket 6 and the quick-change chuck 7 to rotate as a whole, realizing multi-directional precision machining of parts. The rotating disk is designed with 5 rectangular grooves. The rectangular grooves on both sides are used to install single-lip spring rotating sealing strips to ensure the air tightness of the rotating disk during rotation. The two rectangular grooves in the middle lead the gas to the fixed bracket 6 through the pipeline design. For details, see Figure 8 and Fig. 9 As shown. One end of the rotary joint is connected to the fixed ring 3, and the other end is connected to the annular groove inside the rotating disk. When the rotating disk rotates, the rotary joint can maintain the continuity of the air path and ensure that the compressed air can smoothly enter the annular groove. In the case of small clearance fit, the sealing performance is very important. A high-precision sealing structure, that is, a single-lip spring rotary seal strip, is required between the rotary joint and the fixed ring 3 to prevent compressed air leakage.

[0033] Turntable air path 5: guides the compressed air from the rotating disk to the quick-change chuck 7. The pipeline adopts the connection method of plug-in quick-change joints, which is convenient and fast, and has good sealing performance. The turntable air path 5 is an important channel connecting the rotating disk and the quick-change chuck. It is responsible for transmitting compressed air from the fixed air source to the rotating quick-change chuck, allowing the air flow to pass freely between the rotating disk and the fixed air source while maintaining sealing performance. The turntable air path 5 is connected to the rotating disk through the bottom of the fixed bracket 6; the rotating disk and the fixed bracket 6 are both provided with vents, and the vents are plugged with vent joints; Fixed bracket 6: One end of the fixed bracket is connected and fixed to the rotating disk through a positioning pin. A quick-change chuck 7 is installed directly above the fixed bracket 6. The positioning pin is designed to ensure that the center line of the quick-change chuck is on the rotation center of the turntable with an accuracy of 0.005mm. It can achieve zero-point rapid positioning during the processing process and is an important component that cooperates with the quick-change fixture in the process of automated precision processing. A support rod is installed at the bottom of the fixed bracket 6; Quick-change chuck 7: The quick-change chuck is used for fast and precise positioning of the pallet. The clamping and loosening between the chuck and the pallet are controlled by the management and control system to achieve automated clamping and precision machining between multiple processes.

[0034] A quick-change chuck is a device that can quickly replace and clamp workpieces. It is usually composed of a chuck body, claws, a drive mechanism, a locking mechanism, and other parts. In applications where pallets are quickly and precisely positioned, the quick-change chuck uses its precise mechanical structure and pneumatic or electric system to quickly clamp and release the pallet. The control system controls the drive mechanism of the quick-change chuck by receiving external signals or preset programs, thereby achieving precise control of the clamping and release states between the chuck and the pallet. The control system usually has the characteristics of high precision, high reliability, and easy programming, and can meet the needs of different automated production and processing processes.

[0035] The quick-change chuck can quickly position the pallet in the quick-change fixture through its precise mechanical structure and drive mechanism. This not only improves production efficiency, but also ensures the machining accuracy of the workpiece. The quick-change chuck uses high-precision claws and clamping mechanisms to achieve precise clamping of the pallet. This not only prevents the workpiece from displacement or deformation during processing, but also ensures the consistency of processing quality. Through the management and control system, the quick-change chuck can be automatically controlled. This means that it can be integrated with other automation equipment and systems to achieve fully automated operation of the production line.

[0036] A quick-change fixture is a device that can quickly replace fixtures, usually consisting of a standard tray, a special fixture, and a chip; The standard pallet is the basic support component of the quick-change fixture. It provides a standardized platform for mounting and fixing special fixtures. The design of the standard pallet usually takes into account the compatibility with the processing equipment to ensure that the fixture can be quickly and accurately connected to the equipment. In addition, the standard pallet also has a certain rigidity and stability to support the weight and force of the fixture and workpiece during the processing.

[0037] Special fixtures are the core components of quick-change fixtures. They are directly used to clamp the workpiece and ensure the stability and accuracy of the workpiece during processing. The design of special fixtures is usually customized according to the shape, size and processing requirements of the workpiece to provide the best clamping effect and processing accuracy. In addition, special fixtures also have certain adaptability and flexibility so that they can be quickly replaced and adjusted when processing different workpieces.

[0038] In quick-change fixtures, chips usually refer to electronic components used for identification, communication or control functions. These chips may be embedded in the control system of standard pallets, special fixtures or quick-change fixtures to achieve functions such as automatic identification, status monitoring, communication control, etc. of the fixture. For example, some quick-change fixture systems may use RFID chips to identify different fixture types or states, thereby realizing intelligent management and control of fixtures.

[0039] Advantages of the invention: The advantage of the invention is that a zero-point device for automated precision machining of blade tenons is provided.

[0040] It should be noted that the terms "left side", "right side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A zero point positioning device for a machining center turntable, characterized in that: include, A connecting plate (1), a fixing ring (3), a rotating disk (4), a fixing bracket (6) and a quick-change chuck (7); The fixing ring (3) is mounted on the periphery of the rotating disk (4), and the fixing ring (3) is fixed to the turntable base of the device via a connecting plate (1); one end of the rotating disk (4) is fixed to the end surface of the turntable of the device, and the other end is connected to the fixing bracket (6); the quick-change chuck (7) is fixedly mounted directly above the fixing bracket (6).

2. A zero point positioning device for a machining center turntable according to claim 1, characterized in that: A rotating disk air path (5) is provided between the rotating disk (4) and the quick-change chuck (7) for guiding compressed air.

3. The zero point positioning device for a machining center turntable according to claim 1, characterized in that: The top of the fixing ring is designed with (2) vent holes; the outer ring air path (2) is installed in coordination with the vent holes, and the fixing ring (3) is connected to the compressed air pipeline of the equipment through the outer ring air path (2).

4. A zero point positioning device for a machining center turntable according to claim 1, characterized in that: The rotating disk (4) is provided with a plurality of rectangular grooves in the circumferential direction, wherein the rectangular grooves on both sides of the edge are used to install single-lip spring rotating sealing strips; and the rectangular grooves in the middle are used to guide the gas to the fixed bracket (6) through pipelines.

5. A zero point positioning device for a machining center turntable according to claim 4, characterized in that: Ventilation holes are arranged in the two rectangular grooves in the middle.

6. The zero point positioning device for a machining center turntable according to claim 1, characterized in that: A boss is provided on the top of the fixing ring (3), and the connecting plate (1) is fixedly connected to the boss of the fixing ring (3) by means of bolts.

7. The zero point positioning device for a machining center turntable according to claim 1, characterized in that: The connecting plate (1) is in a T-shaped structure, one end of the connecting plate (1) is connected to the fixing ring (3), and the other end of the connecting plate (1) is connected to the base of the equipment turntable.

8. The zero point positioning device for a machining center turntable according to claim 1, characterized in that: The fixing ring (3) and the rotating disk (4) are installed with clearance fit.

9. The zero point positioning device for a machining center turntable according to claim 1, characterized in that: A positioning pin is provided on the quick-change chuck (7) so that the center line of the quick-change chuck (7) is on the rotation center of the equipment turntable.

10. Application of a machining center turntable zero point positioning device in the automated processing of blade tenons, based on a machining center turntable zero point positioning device according to any one of claims 1 to 9, characterized in that: During processing, the machining center turntable zero point positioning device is installed on the equipment turntable, the air source is connected, the blade tenon is installed on the quick change fixture, and the quick change fixture is installed on the machining center turntable zero point positioning device, so as to automatically process the blade tenon.

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