Milling and grinding composite processing device and processing method thereof

Abstract

This invention discloses a milling and grinding composite machining device, specifically relating to the field of grinding composite machining technology. It includes an operating table, a transmission mechanism fixedly connected to the top front side of the operating table, a part fixing mechanism movably connected to the top of the transmission mechanism, a finishing spindle fixedly connected to the top rear side of the operating table, an automatic tool changing machining spindle fixedly connected to the side of the top rear side of the operating table away from the finishing spindle, a workpiece magazine base fixedly connected to the side of the top rear side of the operating table away from the automatic tool changing machining spindle, a turntable control mechanism fixedly connected to the top of the workpiece magazine base, and a turntable fixedly connected to the front side of the turntable control mechanism. This invention incorporates a workpiece fixing tube. To meet the machining needs of workpieces of different shapes and sizes, this invention also designs an adjustable workpiece fixing tube structure. Through fine adjustment of the tool clamping mechanism, precise positioning and clamping of the tool are achieved.

Description

Technical Field

[0001] This invention relates to the field of grinding composite machining technology, and more specifically, to a milling-grinding composite machining apparatus and its machining method. Background Technology

[0002] Milling and grinding refers to the efficient and high-precision processing of workpieces by combining milling and grinding. In the current machining industry, milling and grinding composite machining technology is gradually becoming one of the core processes in the field of precision manufacturing because it can significantly improve processing efficiency and accuracy.

[0003] Among them, CN207026967U discloses a boring, milling, and grinding composite machining device, including a mechanical spindle disposed in a sealed housing. An adjusting rotor shaft is installed in the eccentric hole of the mechanical spindle through a bearing. An electric spindle is connected to the eccentric hole of the adjusting rotor shaft through a flange. A cutting tool or grinding head for machining parts is installed on the electric spindle. A servo motor and a worm gear mechanism capable of reverse self-locking are installed in the inner hole of the mechanical spindle. The adjusting rotor shaft is connected to the servo motor through the worm gear mechanism. The servo motor rotates the adjusting rotor shaft according to the angle command through the worm gear mechanism, changing the radial distance between the electric spindle and the mechanical spindle, thereby changing the machining range. The mechanical spindle drives the electric spindle to achieve axial feed.

[0004] When machining parts, multiple cutting tools or grinding heads are usually required for different stages of machining to meet the multi-dimensional and high-precision requirements of the parts. However, existing milling and grinding composite machining devices often have the problems of cumbersome operation and long time consumption when changing cutting tools or grinding heads. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a milling and grinding composite machining device. The technical problem to be solved by the present invention is that when it is necessary to process parts, multiple tools or grinding heads are usually required to perform different stages of processing in order to meet the multi-dimensional and high-precision requirements of the parts. However, existing milling and grinding composite machining devices often have the problems of cumbersome operation and long time consumption when changing tools or grinding heads.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention relates to a milling and grinding composite machining device, comprising an operating table, a transmission mechanism fixedly connected to the front top of the operating table, a part fixing mechanism movably connected to the top of the transmission mechanism, a finishing spindle fixedly connected to the rear top of the operating table, an automatic tool changing machining spindle fixedly connected to the rear top of the operating table away from the finishing spindle, a workpiece storage base fixedly connected to the rear top of the operating table away from the automatic tool changing machining spindle, a turntable control mechanism fixedly connected to the top of the workpiece storage base, a turntable fixedly connected to the front of the turntable control mechanism, and a plurality of fixed pipe connecting clamps fixedly connected in a circular array to the outer wall of the turntable, with workpiece fixing pipes fixedly connected to the inner walls of the plurality of fixed pipe connecting clamps.

[0008] The workpiece fixing tube includes a rear tube, a tool clamping mechanism is fixedly connected to the rear side of the inner wall of the rear tube, and a front tube is fixedly connected to the front side of the rear tube.

[0009] As a further embodiment of the present invention: the tool clamping mechanism includes a control chamber, a front plate is fixedly connected to the front side of the control chamber, the rear side of the control chamber is fixedly connected to the rear side of the inner wall of the rear tube, a connecting plate is fixedly connected to the front end of the front plate, and clamping rods are slidably connected to the four sides of the front side of the front plate respectively.

[0010] As a further aspect of the present invention: the control chamber includes a control chamber shell, a lead screw is rotatably connected to the middle of the rear side of the inner wall of the control chamber shell, a motor placement plate is fixedly connected to the rear side of the inner wall of the control chamber shell, a motor is fixedly connected to the front side of the motor placement plate, a first conical tooth is fixedly connected to the output end of the motor, the outer wall of the first conical tooth meshes with a second conical tooth, and the inner wall of the second conical tooth is fixedly connected to the outer wall of the lead screw.

[0011] As a further aspect of the present invention: the front disc includes a front disc body, and a slide rod is fixedly connected to the inner wall of the front disc body. The front and rear ends of the slide rod extend to the front and rear sides of the front disc body, respectively. The inner wall of the slide rod has a hollow design. Slide grooves are respectively opened on the four sides of the front side of the front disc body. A slide shaft is slidably connected to the front side of the outer wall of the slide rod. Two hinge rods are rotatably connected to the four sides of the outer wall of the slide shaft. Fixed shafts are fixedly connected to the two sides of the outer wall of the slide rod near the slide shaft and away from the slide shaft, respectively. The outer wall structure of the two fixed shafts is the same as the outer wall structure of the slide shaft. The multiple sets of hinge rods on the outer walls of the two fixed shafts are oriented in the opposite direction to the multiple sets of hinge rods on the outer wall of the slide shaft.

[0012] As a further aspect of the present invention: a plurality of connecting rods are fixedly connected to the front side of the sliding shaft in an annular array, and a transmission shaft is fixedly connected to the inner side of the plurality of connecting rods.

[0013] As a further embodiment of the present invention: the lead screw extends through the inner wall of the slide bar to the front side of the slide bar and its outer wall is threadedly connected to the inner wall of the transmission shaft.

[0014] As a further embodiment of the present invention: each of the four clamping rods includes a hinge plate, the front and rear sides of the outer walls of the four hinge plates are rotatably connected to the opposing surfaces of the two sets of hinge rods, the side of each of the four hinge plates away from the hinge rods is fixedly connected to an arc-shaped clamping plate connecting rod, the rear outer walls of the four arc-shaped clamping plate connecting rods are slidably connected to the inner wall of the slide groove, the front sides of the four arc-shaped clamping plate connecting rods are fixedly connected to an arc-shaped clamping plate, and the outer walls of the four arc-shaped clamping plates are movably connected to the inner wall of the front tube in a ring array.

[0015] As a further embodiment of the present invention: the connecting plate includes a connecting plate body, the rear side of the connecting plate body is fixedly connected to the front side of a plurality of connecting rods, a circular groove is provided in the middle of the connecting plate body, connecting plate sliding grooves are provided on the four sides of the connecting plate body, and concave fixing blocks are fixedly connected to the four sides of the front side of the connecting plate body.

[0016] As a further aspect of the present invention: a rear plate is fixedly connected to the opposite surfaces of the four concave fixed base blocks; a concave slider is slidably connected to the side of each of the four concave fixed base blocks away from the rear plate; a fixed rotating block is rotatably connected to the side of each of the four concave sliders away from the rear plate; a second spring is fixedly connected to the side of each of the four concave sliders near the concave fixed base blocks; the side of each of the four second springs away from the concave sliders is fixedly connected to the side of each of the concave fixed base blocks near the concave sliders; a first spring is fixedly connected to the top of the side of each of the four fixed rotating blocks away from the concave sliders; and the side of each of the four first springs away from the fixed rotating blocks is fixedly connected to the side of the rear plate near the concave fixed base blocks.

[0017] In addition, the present invention also relates to a milling-grinding composite machining method using a milling-grinding composite machining apparatus, comprising the following steps:

[0018] Step 1: Place the workpiece to be processed precisely on the processing platform and use a positioning device to ensure that the position of the workpiece is accurate, so as to reduce errors and deviations during the processing.

[0019] Step 2: Select a suitable cutting tool according to the processing requirements of the workpiece, and fix it through the tool clamping mechanism to ensure that the tool is firmly installed in the front tube, and that its handle is double-clamped by the arc-shaped clamping plate and the fixed rotating block to ensure stability and safety during the processing.

[0020] Step 3: Start the main control system of the milling and grinding composite machining device, set the required machining parameters, including machining depth, feed rate, spindle speed, etc. The system will automatically adjust the working status of each component according to the preset parameters to achieve the best machining effect;

[0021] Step 4: Start the milling function and use the tool to perform preliminary cutting on the workpiece to remove excess material and form a rough machining outline. During this process, the high-speed rotation of the tool and the relative movement of the workpiece work together to achieve precise material removal.

[0022] Step 5: Switch to the grinding function and use the grinding tool to perform fine treatment on the surface of the workpiece after preliminary processing, so as to improve the surface quality and accuracy of the workpiece. During the grinding process, the grinding pressure and speed can be adjusted as needed to obtain the ideal processing effect.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. This invention, by setting up a turntable control mechanism and an automatic tool changing machining spindle, realizes efficient and automated workpiece replacement and positioning, further improving processing efficiency and flexibility. The turntable control mechanism precisely drives the turntable to rotate, ensuring that each fixed tube connecting clamp and its internal workpiece fixing tube can be accurately aligned with the automatic tool changing machining spindle without manual intervention, reducing labor intensity, and improving processing accuracy and consistency.

[0025] 2. In order to meet the processing needs of workpieces of different shapes and sizes, the present invention has designed an adjustable workpiece fixing tube structure by setting up a workpiece fixing tube. Through the fine adjustment of the tool clamping mechanism, the precise positioning and clamping of the tool is achieved.

[0026] 3. This invention features a tool clamping mechanism that cleverly combines the control chamber and the front plate. A motor drives the lead screw to rotate, which in turn drives the transmission shaft and sliding shaft to slide along the sliding rod, achieving synchronous opening and closing of the clamping rod. Four arc-shaped clamping plates, driven by the clamping rod, tightly fit the tool handle. Combined with the second and first springs between the concave fixed base block and the concave slider, this provides a double clamping force for the tool, ensuring its stability and safety during machining. Furthermore, this design facilitates quick tool changes and improves machining efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body of the present invention;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of the workpiece fixing tube of the present invention;

[0029] Figure 3 This is a schematic diagram of the three-dimensional separation structure of the workpiece fixing tube of the present invention;

[0030] Figure 4 This is a three-dimensional schematic diagram of the three-dimensional separation structure of the tool clamping mechanism of the present invention;

[0031] Figure 5This is a schematic diagram of the three-dimensional structure of the control chamber of the present invention;

[0032] Figure 6 This is a schematic diagram of the front disc structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the three-dimensional structure of the clamping rod of the present invention;

[0034] Figure 8 This is a schematic diagram of the three-dimensional structure of the connecting disk of the present invention;

[0035] Figure 9 This is an enlarged structural diagram of point A in the present invention.

[0036] In the diagram: 1. Operating table; 2. Transmission mechanism; 3. Part fixing mechanism; 4. Finishing spindle; 5. Automatic tool changer spindle; 6. Workpiece magazine base; 7. Turntable control mechanism; 8. Turntable; 9. Workpiece fixing tube; 91. Rear tube; 92. Front tube; 93. Tool clamping mechanism; 931. Control compartment; 9311. Control compartment housing; 9312. Motor placement plate; 9313. Motor; 9314. First conical tooth; 9315. Second conical tooth; 9316. Lead screw; 932. Front plate; 9321. Front plate body; 9322. Slide; 9323. 9324. Slide rod; 9325. Hinge rod; 9326. Connecting rod; 9327. Drive shaft; 9328. Fixed shaft; 933. Clamping rod; 9331. Hinge plate; 9332. Arc-shaped clamping plate connecting rod; 9333. Arc-shaped clamping plate; 934. Connecting disc; 9341. Connecting disc body; 9342. Circular groove; 9343. Connecting disc sliding groove; 9344. Concave fixed bottom block; 9345. Back plate; 9346. First spring; 9347. Concave slider; 9348. Fixed rotating block; 9349. Second spring; 10. Fixed tube connecting clamp. Detailed Implementation

[0037] 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.

[0038] like Figure 1-9As shown, the present invention provides a milling and grinding composite machining device, including an operating table 1. A transmission mechanism 2 is fixedly connected to the front top of the operating table 1. A part fixing mechanism 3 is movably connected to the top of the transmission mechanism 2. A finishing spindle 4 is fixedly connected to the rear top of the operating table 1. An automatic tool changing machining spindle 5 is fixedly connected to the rear top of the operating table 1 away from the finishing spindle 4. A workpiece storage base 6 is fixedly connected to the rear top of the operating table 1 away from the automatic tool changing machining spindle 5. A turntable control mechanism 7 is fixedly connected to the top of the workpiece storage base 6. A turntable 8 is fixedly connected to the front of the turntable control mechanism 7. A plurality of fixed tube connecting clamps 10 are fixedly connected to the outer wall of the turntable 8 in a ring array. Workpiece fixing tubes 9 are fixedly connected to the inner walls of the plurality of fixed tube connecting clamps 10.

[0039] When machining parts, multiple tool handles are first inserted into the inner walls of multiple workpiece fixing tubes 9, which then fix the tool handles. The multiple workpiece fixing tubes 9 are then clamped inside multiple fixing tube connecting clamps 10 for rapid switching and positioning. Next, the turntable control mechanism 7 is activated, precisely controlling the rotation angle and position of the turntable 8. This allows the workpiece fixing tube 9, equipped with the required tool or grinding head, to move precisely to the front of the automatic tool changer spindle 5. The automatic tool changer spindle 5 integrates a highly efficient automatic tool changing system. This system uses built-in sensors to identify the type of tool or grinding head currently inside the workpiece fixing tube 9 and automatically adjusts the spindle's position and orientation according to a preset machining program or real-time instructions, precisely docking with the workpiece fixing tube 9. After docking, the transmission mechanism 2 is activated, causing the workpiece to be machined on the part fixing mechanism 3 to move smoothly to the machining area.

[0040] like Figure 2-8As shown, the workpiece fixing tube 9 includes a rear tube 91, a tool clamping mechanism 93 is fixedly connected to the rear side of the inner wall of the rear tube 91, a front tube 92 is fixedly connected to the front side of the rear tube 91, the tool clamping mechanism 93 includes a control chamber 931, a front plate 932 is fixedly connected to the front side of the control chamber 931, the rear side of the control chamber 931 is fixedly connected to the rear side of the inner wall of the rear tube 91, a connecting plate 934 is fixedly connected to the front end of the front plate 932, clamping rods 933 are slidably connected to the four sides of the front side of the front plate 932, the control chamber 931 includes a control chamber shell 9311, a lead screw 9316 is rotatably connected to the middle of the rear side of the inner wall of the control chamber shell 9311, and a motor placement plate 9312 is fixedly connected to the rear side of the inner wall of the control chamber shell 9311. A motor 9313 is fixedly connected to the front side of plate 2. A first conical tooth 9314 is fixedly connected to the output end of the motor 9313. The outer wall of the first conical tooth 9314 meshes with a second conical tooth 9315. The inner wall of the second conical tooth 9315 is fixedly connected to the outer wall of the lead screw 9316. The front plate 932 includes a front plate body 9321. A slide rod 9323 is fixedly connected to the inner wall of the front plate body 9321. The front and rear ends of the slide rod 9323 extend to the front and rear sides of the front plate body 9321, respectively. The inner wall of the slide rod 9323 has a hollow design. Slide grooves 9322 are opened on the four sides of the front side of the front plate body 9321. A slide shaft 9324 is slidably connected to the front side of the outer wall of the slide rod 9323. Two hinges are rotatably connected to the four sides of the outer wall of the slide shaft 9324. The outer walls of the connecting rod 9325 and the sliding rod 9323 are fixedly connected to two fixed shafts 9328 on both sides near and away from the sliding shaft 9324. The outer wall structure of the two fixed shafts 9328 is the same as that of the sliding shaft 9324. The multiple sets of hinge rods 9325 on the outer walls of the two fixed shafts 9328 face opposite directions to the multiple sets of hinge rods 9325 on the outer walls of the sliding shaft 9324. Multiple connecting rods 9326 are fixedly connected to the front side of the sliding shaft 9324 in a ring array. The inner side of the multiple connecting rods 9326 is fixedly connected to the drive shaft 9327. The lead screw 9316 extends through the inner wall of the sliding rod 9323 to the front side of the sliding rod 9323 and its outer wall is threaded to the inner wall of the drive shaft 9327. All four clamping rods 933 include hinge plates 933. 1. The front and rear sides of the outer walls of the four hinge plates 9331 are rotatably connected to the opposite surfaces of the two sets of hinge rods 9325. Arc-shaped clamping plate connecting rods 9332 are fixedly connected to the side of each of the four hinge plates 9331 away from the hinge rods 9325. The rear outer walls of the four arc-shaped clamping plate connecting rods 9332 are slidably connected to the inner wall of the slide groove 9322. Arc-shaped clamping plates 9333 are fixedly connected to the front sides of the four arc-shaped clamping plate connecting rods 9332. The outer walls of the four arc-shaped clamping plates 9333 are movably connected in a ring array to the inner wall of the front tube 92. The connecting disc 934 includes a connecting disc body 9341. The rear side of the connecting disc body 9341 is fixedly connected to the front side of multiple connecting rods 9326. A circular groove 9342 is formed in the middle of the connecting disc body 9341.The four sides of the connecting plate body 9341 are respectively provided with connecting plate grooves 9343, and the four front sides of the connecting plate body 9341 are respectively fixedly connected with concave fixing blocks 9344.

[0041] When it is necessary to fix the tool, first insert the tool handle fixed to the rear side of the tool into the inner wall of the front tube 92 through the front side of the front tube 92. Then start the motor 9313. Its power is transmitted to the lead screw 9316 through the meshing of the first bevel tooth 9314 and the second bevel tooth 9315, so that the lead screw 9316 rotates in the control chamber housing 9311. As the lead screw 9316 rotates, the drive shaft 9327 threaded to its outer wall begins to move forward. The drive shaft 9327 is connected to the slide shaft 9324 through multiple connecting rods 9326, thereby driving the slide shaft 9324 and its structure to move forward together.

[0042] The movement of the sliding shaft 9324 causes the angle of multiple sets of hinge rods 9325 hinged to its outer wall to change. The other end of these hinge rods 9325 is connected to the hinge plate 9331. Therefore, the hinge plate 9331 will also move inward or outward as the angle of the hinge rods 9325 changes. Since the four hinge plates 9331 are located on the four sides of the front plate 932 respectively, and the front and rear sides of its outer wall are rotatably connected to the opposite surfaces of the front and rear sets of hinge rods 9325, when the angle of the hinge rods 9325 changes, the four hinge plates 9331 will move towards the center at the same time, causing the arc-shaped clamping plate connecting rod 9332 to slide in the slide groove 9322, thereby making the arc-shaped clamping plate 9333 tightly adhere to the outer wall of the tool handle inserted into the inner wall of the front tube 92, forming a firm clamping of the tool handle.

[0043] Meanwhile, the connecting plate 934 moves forward as the front plate 932 and the sliding shaft 9324 move forward, ensuring the stability of the connecting plate 934 and the entire tool clamping mechanism 93 during the clamping process.

[0044] like Figure 9 As shown, the four concave fixed base blocks 9344 are all fixedly connected to the back plate 9345 on their opposite sides. The four concave fixed base blocks 9344 are all slidably connected to the concave sliders 9347 on the side away from the back plate 9345. The four concave sliders 9347 are all rotatably connected to the fixed rotating blocks 9348 on the side away from the back plate 9345. The four concave sliders 9347 are all fixedly connected to the side of the concave fixed base blocks 9344 on the side of the concave fixed base blocks 9344. The four second springs 9349 are all fixedly connected to the side of the concave fixed base blocks 9344 on the side of the concave fixed base blocks 9347 ...6 on the side of the concave fixed base blocks 9344 on the side of the back plate 9345 on the side of the concave fixed base blocks 9344 on the side of the concave fixed base blocks 9344 on the side of the concave fixed base blocks 9344 on the side of the concave fixed base blocks 9344 on the side of the concave fixed base blocks 9344 on the side of the concave fixed base blocks 9344 on the side of the

[0045] When the connecting plate 934 moves forward, the four fixed rotating blocks 9348 on its front side are pushed by the rear end of the tool handle and slide outward along the trajectory of the concave slider 9347. During this process, the first spring 9346 is compressed and stores elastic potential energy. At the same time, since the concave slider 9347 and the concave fixed bottom block 9344 are connected by the second spring 9349, when the fixed rotating block 9348 moves, the concave slider 9347 will be subjected to an inward reaction force. However, this force is buffered by the elasticity of the second spring 9349, ensuring the smooth movement of the entire structure.

[0046] As the connecting disc 934 is pushed further, the four fixed rotating blocks 9348 will rotate and fit tightly against the rear end surface of the tool handle. At this time, the compression of the first spring 9346 reaches its maximum, providing sufficient clamping force. Together with the arc-shaped clamping plate 9333, it achieves double fixation of the tool.

[0047] In addition, the present invention also relates to a milling-grinding composite machining method using a milling-grinding composite machining apparatus, comprising the following steps:

[0048] Step 1: Place the workpiece to be processed precisely on the processing platform and use a positioning device to ensure that the position of the workpiece is accurate, so as to reduce errors and deviations during the processing.

[0049] Step 2: Select a suitable cutting tool according to the processing requirements of the workpiece, and fix it through the cutting tool clamping mechanism 93 to ensure that the cutting tool is stably installed in the front tube 92, and its handle is double-clamped by the arc-shaped clamping plate 9333 and the fixed rotating block 9348 to ensure stability and safety during the processing.

[0050] Step 3: Start the main control system of the milling and grinding composite machining device, set the required machining parameters, including machining depth, feed rate, spindle speed, etc. The system will automatically adjust the working status of each component according to the preset parameters to achieve the best machining effect;

[0051] Step 4: Start the milling function and use the tool to perform preliminary cutting on the workpiece to remove excess material and form a rough machining outline. During this process, the high-speed rotation of the tool and the relative movement of the workpiece work together to achieve precise material removal.

[0052] Step 5: Switch to the grinding function and use the grinding tool to perform fine treatment on the surface of the workpiece after preliminary processing, so as to improve the surface quality and accuracy of the workpiece. During the grinding process, the grinding pressure and speed can be adjusted as needed to obtain the ideal processing effect.

[0053] The working principle of this invention is as follows: When a part needs to be processed, multiple tool handles are first inserted into the inner walls of multiple workpiece fixing tubes 9, and the tool handles are fixed by the workpiece fixing tubes 9. Then, multiple workpiece fixing tubes 9 are clamped on the inner side of multiple fixing tube connecting clamps 10 to achieve rapid switching and positioning. Then, the turntable control mechanism 7 is activated, which precisely controls the rotation angle and position of the turntable 8, so that the workpiece fixing tube 9 with the required tool or grinding head can move accurately to the front of the automatic tool changing machining spindle 5. In the automatic tool changing machining spindle 5, a set of efficient automatic tool changing system is integrated. The system identifies the type of tool or grinding head in the current workpiece fixing tube 9 through the built-in sensor, and automatically adjusts the position and posture of the spindle according to the preset machining program or real-time instructions to accurately dock with the workpiece fixing tube 9. After docking, the transmission mechanism 2 is activated, which drives the workpiece to be processed on the part fixing mechanism 3 to move smoothly to the machining area.

[0054] When it is necessary to fix the tool, first insert the tool handle fixed to the rear of the tool into the inner wall of the front tube 92 through the front side of the front tube 92. Then, start the motor 9313. Its power is transmitted to the lead screw 9316 through the meshing of the first bevel gear 9314 and the second bevel gear 9315, causing the lead screw 9316 to rotate inside the control chamber housing 9311. As the lead screw 9316 rotates, the drive shaft 9327 threaded to its outer wall begins to move forward. The drive shaft 9327 is connected to the sliding shaft 9324 through multiple connecting rods 9326, thereby driving the sliding shaft 9324 and its structure to move forward together. The movement of the sliding shaft 9324 causes multiple sets of hinge rods 9325 hinged to its outer wall to change angle. The other end of these hinge rods 9325 is connected to the hinge plate 9331. Therefore, the hinge plate 9331 will also move inward or outward as the angle of the hinge rod 9325 changes. Since the four hinge plates 9331 are located on the four sides of the front plate 932 respectively, and the front and rear sides of their outer walls are rotatably connected to the opposite surfaces of the two sets of hinge rods 9325, when the angle of the hinge rod 9325 changes, the four hinge plates 9331 will move towards the center at the same time, causing the arc-shaped clamping plate connecting rod 9332 to slide in the slide groove 9322, thereby making the arc-shaped clamping plate 9333 tightly adhere to the outer wall of the tool handle inserted into the inner wall of the front tube 92, forming a firm clamping of the tool handle. At the same time, the connecting plate 934 moves forward as the front plate 932 and the slide shaft 9324 move forward, ensuring the stability of the connecting plate 934 and the entire tool clamping mechanism 93 during the clamping process.

[0055] When the connecting disc 934 moves forward, the four fixed rotating blocks 9348 on its front side are pushed by the rear end of the tool handle and slide outward along the trajectory of the concave slider 9347. During this process, the first spring 9346 is compressed and stores elastic potential energy. At the same time, since the concave slider 9347 and the concave fixed base block 9344 are connected by the second spring 9349, when the fixed rotating block 9348 moves, the concave slider 9347 will be subjected to an inward reaction force. However, this force is buffered by the elasticity of the second spring 9349, ensuring the smooth movement of the entire structure. As the connecting disc 934 is pushed further, the opposite surfaces of the four fixed rotating blocks 9348 will rotate and fit tightly against the rear end surface of the tool handle. At this time, the compression of the first spring 9346 reaches its maximum, providing sufficient clamping force. Together with the arc-shaped clamping plate 9333, it achieves double fixation of the tool.

[0056] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0057] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A milling and grinding composite machining device, comprising an operating table (1), characterized in that: A transmission mechanism (2) is fixedly connected to the top front side of the operating table (1). A part fixing mechanism (3) is movable on the top of the transmission mechanism (2). A finishing spindle (4) is fixedly connected to the top rear side of the operating table (1). An automatic tool changing machining spindle (5) is fixedly connected to the side of the top rear side of the operating table (1) away from the finishing spindle (4). A workpiece storage base (6) is fixedly connected to the side of the top rear side of the operating table (1) away from the automatic tool changing machining spindle (5). A turntable control mechanism (7) is fixedly connected to the top of the workpiece storage base (6). A turntable (8) is fixedly connected to the front side of the turntable control mechanism (7). Multiple fixed pipe connecting clamps (10) are fixedly connected to the outer wall of the turntable (8) in a ring array. Workpiece fixing pipes (9) are fixedly connected to the inner walls of the multiple fixed pipe connecting clamps (10). The workpiece fixing tube (9) includes a rear tube (91), a tool clamping mechanism (93) is fixedly connected to the rear side of the inner wall of the rear tube (91), and a front tube (92) is fixedly connected to the front side of the rear tube (91). The tool clamping mechanism (93) includes a control chamber (931), a front plate (932) is fixedly connected to the front side of the control chamber (931), the rear side of the control chamber (931) is fixedly connected to the rear side of the inner wall of the rear tube (91), a connecting plate (934) is fixedly connected to the front end of the front plate (932), and clamping rods (933) are slidably connected to the four sides of the front side of the front plate (932). The control chamber (931) includes a control chamber shell (9311), a lead screw (9316) is rotatably connected to the middle of the rear side of the inner wall of the control chamber shell (9311), a motor placement plate (9312) is fixedly connected to the rear side of the inner wall of the control chamber shell (9311), a motor (9313) is fixedly connected to the front side of the motor placement plate (9312), a first conical tooth (9314) is fixedly connected to the output end of the motor (9313), the outer wall of the first conical tooth (9314) meshes with a second conical tooth (9315), and the inner wall of the second conical tooth (9315) is fixedly connected to the outer wall of the lead screw (9316); The front disc (932) includes a front disc body (9321). A slide rod (9323) is fixedly connected to the inner wall of the front disc body (9321). The front and rear ends of the slide rod (9323) extend to the front and rear sides of the front disc body (9321), respectively. The inner wall of the slide rod (9323) is hollowed out. Slide grooves (9322) are respectively opened on the four sides of the front side of the front disc body (9321). A slide shaft (9324) is slidably connected to the front side of the outer wall of the slide rod (9323). Two hinge rods (9325) are rotatably connected to the four sides of the outer wall of the slide rod (9323). Fixed shafts (9328) are fixedly connected to the two sides of the outer wall of the slide rod (9323) near the slide shaft (9324) and away from the slide shaft (9324). The outer wall structure of the two fixed shafts (9328) is the same as the outer wall structure of the slide shaft (9324). The multiple sets of hinge rods (9325) on the outer wall of the two fixed shafts (9328) are opposite to the multiple sets of hinge rods (9325) on the outer wall of the slide shaft (9324). The front side of the sliding shaft (9324) is fixedly connected to a plurality of connecting rods (9326), and the inner side of the plurality of connecting rods (9326) is fixedly connected to a transmission shaft (9327). The lead screw (9316) extends through the inner wall of the slide bar (9323) to the front side of the slide bar (9323) and its outer wall is threaded to the inner wall of the drive shaft (9327); Each of the four clamping rods (933) includes a hinge plate (9331). The front and rear sides of the outer walls of the four hinge plates (9331) are rotatably connected to the opposite surfaces of the two sets of hinge rods (9325). An arc-shaped clamping plate connecting rod (9332) is fixedly connected to the side of each of the four hinge plates (9331) away from the hinge rod (9325). The rear outer walls of the four arc-shaped clamping plate connecting rods (9332) are slidably connected to the inner wall of the slide groove (9322). An arc-shaped clamping plate (9333) is fixedly connected to the front side of each of the four arc-shaped clamping plate connecting rods (9332). The outer walls of the four arc-shaped clamping plates (9333) are movably connected to the inner wall of the front tube (92) in a ring array.

2. The milling and grinding composite machining device according to claim 1, characterized in that: The connecting plate (934) includes a connecting plate body (9341), the rear side of which is fixedly connected to the front side of a plurality of connecting rods (9326). A circular groove (9342) is provided in the middle of the connecting plate body (9341), and connecting plate sliding grooves (9343) are provided on the four sides of the connecting plate body (9341). A concave fixing base block (9344) is fixedly connected to the four sides of the front side of the connecting plate body (9341).

3. The milling and grinding composite machining device according to claim 2, characterized in that: A rear plate (9345) is fixedly connected to the opposite surfaces of the four concave fixed base blocks (9344). A concave slider (9347) is slidably connected to the side of each of the four concave fixed base blocks (9344) away from the rear plate (9345). A fixed rotating block (9348) is rotatably connected to the side of each of the four concave sliders (9347) away from the rear plate (9345). A second spring (9349) is fixedly connected to the side of each of the four concave sliders (9347) near the concave fixed base blocks (9344). The four second springs (9349) are fixedly connected to the side of the concave slider (9347) away from the concave slider (9347) on the side of the concave fixed base block (9344) near the concave slider (9347) on the top of the side of the four fixed rotating blocks (9348) away from the concave slider (9347) on the top of the top of the side of the four fixed rotating blocks (9347) on the top of the top of the four fixed rotating blocks (9347) on the top of the top of the four fixed rotating blocks (9347) on the top of the four fixed base blocks (9346) on the top of the bottom of the back plate (9345) near the concave fixed base block (9344) on the top of the bottom of the concave fixed base block (9344) on the top of the bottom of the concave fixed base block (9347 ... bottom of the concave fixed base block (9347) on the top of the bottom of the bottom of the bottom of the bottom of the concave fixed base block (9347) on the top of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of 4. A milling-grinding composite machining method using the milling-grinding composite machining apparatus according to any one of claims 1-3, characterized in that, Includes the following steps: Step 1: Place the workpiece to be processed precisely on the processing platform and use the positioning device to ensure that the position of the workpiece is accurate. Step 2: Select a suitable cutting tool according to the processing requirements of the workpiece, and fix it through the cutting tool clamping mechanism (93) to ensure that the cutting tool is stably installed in the front tube (92) and its handle is double-clamped by the arc-shaped clamping plate (9333) and the fixed rotating block (9348); Step 3: Start the main control system of the milling and grinding composite machining device, set the required machining parameters, including machining depth, feed rate and spindle speed. The system will automatically adjust the working status of each component according to the preset parameters. Step 4: Start the milling function and use the cutting tool to perform preliminary cutting on the workpiece to remove excess material and form a rough machining outline; Step 5: Switch to the grinding function and use the grinding tool to perform fine processing on the surface of the workpiece after preliminary processing.

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