A thin-walled part precision turning and milling composite machining device

Abstract

This invention relates to the field of milling and turning technology for thin-walled parts, specifically to a precision milling and turning composite machining device for thin-walled parts. The device includes a machine tool frame, a fixture table fixedly connected to the upper surface of the machine tool frame, an external clamping assembly above the fixture table, an internal clamping assembly above the fixture table, and a stabilizing assembly above the fixture table. The external clamping assembly includes a clamping frame, and a synchronization assembly is provided inside the clamping frame. By using the synchronization assembly in conjunction with a first moving frame, the thin-walled part is externally clamped and fixed. Through the curvature of multiple first arc-shaped frames and the meshing transmission of a first helical gear disc and a first bevel gear, a first screw can be driven to rotate, causing multiple first arc-shaped frames to simultaneously move towards the center, thereby clamping the thin-walled part from the outside. By increasing the external clamping contact area of ​​the thin-walled part, clamping indentations and damage to the thin-walled part are initially reduced.

Description

Technical Field

[0001] This invention relates to the field of milling and turning technology for thin-walled parts, and more specifically, to a precision milling and turning composite machining device for thin-walled parts. Background Technology

[0002] A milling machine is a machining device that combines turning and milling. It can perform turning and milling operations on a workpiece simultaneously on the same machine tool, increasing the machine tool's machining efficiency. When milling machine tools are machining workpieces, they need to use fixtures to hold and fix the workpiece in order to ensure the stability of the workpiece during subsequent milling and turning processes. In the precision machining of thin-walled parts, in order to improve the machining efficiency of thin-walled parts, a milling and turning composite machining device is usually used to machine thin-walled parts.

[0003] Existing precision milling and turning machines for thin-walled parts can only clamp and fix thin-walled parts using traditional workpiece reinforcement methods. Due to the low structural strength of thin-walled parts, especially rotary thin-walled parts, they are prone to indentation or damage during clamping and fixing. Furthermore, during subsequent milling and turning of rotary thin-walled parts, the pressure can easily cause twisting damage, which greatly affects the safety of milling and turning of rotary thin-walled parts. Therefore, precision milling and turning machines for thin-walled parts have shortcomings in use.

[0004] Based on this, the present invention discloses a precision turning and milling composite machining device for thin-walled parts. Summary of the Invention

[0005] To address the problems mentioned in the background art regarding the precision milling and turning composite machining device for thin-walled parts, which causes indentations or damage to rotary thin-walled parts during clamping and fixing, and is also prone to twisting damage due to pressure, this invention provides a precision milling and turning composite machining device for thin-walled parts. The device includes a machine tool frame, a fixture table fixedly connected to the upper surface of the machine tool frame, an external clamping assembly above the fixture table, an internal clamping assembly above the fixture table, and a stabilizing assembly above the fixture table. Since the parts need to be machined after being fixed, in order to ensure that the parts can be machined smoothly; A further improvement to this technical solution is that a guide rail is fixedly connected to the outer surface of the machine tool frame, a gantry frame is fixedly installed on the outer surface of the guide rail, and a thin-walled part is provided above the fixture table.

[0006] Because it is necessary to clamp thin-walled parts without damaging them; As a further improvement to this technical solution, the external clamping assembly includes a clamping frame, a synchronization component is provided inside the clamping frame, a plurality of first arc-shaped frames are provided above the clamping frame, a plurality of sliding grooves are provided on the upper surface of the clamping frame, and a plurality of first movable frames are provided inside the clamping frame.

[0007] Based on this, since the first arc-shaped frame is required to simultaneously clamp the part and position the center of the part to ensure that subsequent milling and turning processes can proceed normally, this technical solution adopts a synchronous component. As a further improvement to this technical solution, the synchronization component includes a first helical gear disk, which is rotatably connected to the inner bottom wall of the clamping frame. A first worm gear is fixedly connected to the outer surface of the first helical gear disk, and a first worm is meshed with the outer surface of the first worm gear. A plurality of first bevel gears are meshed with the outer surface of the first helical gear disk, and a first screw is fixedly connected to the other end of each of the first bevel gears. The outer surface of each of the first screws is threadedly connected to the first moving frame.

[0008] Based on this, since clamping thin-walled parts from the outside will cause indentations on the thin-walled parts, in order to ensure the stability of the clamping of the thin-walled parts while preventing indentations from appearing due to clamping and fixing; As a further improvement to this technical solution, the internal clamping assembly includes several second arc-shaped frames and second helical gear disks. The second helical gear disks are disposed above the first helical gear disks and are rotatably connected to the inner top wall of the clamping frame. The bottom surfaces of the second arc-shaped frames are all in contact with the upper surface of the clamping frame. Several second movable frames are disposed inside the clamping frame. Several second bevel gears are meshed with the outer surface of the second helical gear disks. The other end of each of the second bevel gears is fixedly connected to a second screw. The outer surface of each second screw is threadedly connected to the second movable frame.

[0009] In another solution, since the clamping position and force of the second arc frame need to be balanced with those of the first arc frame, the second arc frame also needs to move synchronously to prevent the parts from having indentations due to differences in internal clamping force and position. As a further improvement to this technical solution, threaded cylinders are fixedly connected to the upper surfaces of the second movable frame and the first movable frame. The bottom surfaces of the first and second arc-shaped frames are fixedly connected to the top of the threaded cylinders. The threaded cylinders are slidably connected inside the sliding groove. A connecting rod is fixedly connected to the bottom end of the second helical gear plate. The connecting rod is rotatably connected inside the first helical gear plate. A second worm gear is fixedly connected to the bottom end of the connecting rod. A second worm is meshed with the outer surface of the second worm gear.

[0010] Based on this, since metal scraps and residues enter the clamping frame through the sliding groove, they will affect the normal rotation of the first screw and the second screw, causing the threaded connection of the first screw and the second screw to jam. In order to ensure that the first screw and the second screw can smoothly drive the first moving frame and the second moving frame to move; As a further improvement to this technical solution, two rubber flexible plates are fixedly connected to the inner wall of each sliding groove. One side of each rubber flexible plate is in contact with the outer surface of the threaded cylinder. A sealing plate is fixedly connected to the outer surface of each threaded cylinder. The sealing plates are slidably connected inside the sliding groove, and the upper surface of each sealing plate is in contact with the bottom surface of the rubber flexible plate.

[0011] In order to stabilize the positions of the first screw and the second screw, and to ensure that the first screw and the second screw can limit their positions without affecting rotation, so that the first screw and the second screw can transmit power smoothly; As a further improvement to this technical solution, a set of bearing seats is provided below each of the two adjacent sealing plates, and the number of bearing seats in each set is two. The second screw and the first screw are rotatably connected inside the bearing seats, and the bottom surface of the bearing seats is fixedly connected to the inner bottom wall of the clamping frame.

[0012] Based on this, since the first and second moving frames will swing during the sliding process, in order to improve the stability of the first and second moving frames during the sliding process; As a further improvement to this technical solution, each set of bearing seats is fixedly connected to a sliding rod on opposite sides, and the inner walls of the first and second movable frames are slidably connected to the outer surface of the sliding rod.

[0013] In another approach, since different thin-walled parts have different heights, when the height of a thin-walled part is much higher than the first and second arc-shaped supports, the pressure during the milling and turning process will cause the upper surface of the thin-walled part to twist and deform. In order to further improve the safety and reliability of milling and turning of thin-walled parts of different specifications; As a further improvement to this technical solution, the stabilizing component includes several third arc-shaped frames. The bottom surface of each third arc-shaped frame contacts the upper surface of the corresponding first and second arc-shaped frames. Telescopic rods are symmetrically arranged on both sides of the bottom of each third arc-shaped frame. The third arc-shaped frame is connected to the corresponding first and second arc-shaped frames through the telescopic rods. Adjusting bolts are threadedly connected to the inner walls of the first arc-shaped frames and the inner walls of each second arc-shaped frame. The outer surface of the adjusting bolts is rotatably connected to the third arc-shaped frame. The adjusting bolts are threadedly connected to the threaded cylinder.

[0014] Based on this, after the adjusting bolt drives the third arc frame to adjust its height, it is easy for it to loosen due to vibration and shaking, which affects the stability of the height adjustment of the third arc frame. As a further improvement to this technical solution, a limiting component is provided inside the third arc-shaped frame. The limiting component includes several cavities, which are located inside the third arc-shaped frame. An upper gear plate is provided inside the cavity. The inner wall of the upper gear plate is fixedly connected to the outer surface of the adjusting bolt. A lower gear plate is slidably connected to the outer surface of the adjusting bolt. The upper surface of each lower gear plate is engaged with the bottom surface of the upper gear plate. A fastening spring is sleeved on the outer surface of the adjusting bolt. The top and bottom ends of the fastening spring are fixedly connected to the upper surface of the lower gear plate and the inner bottom wall of the cavity, respectively.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this precision milling and turning composite machining device for thin-walled parts, a synchronization component and an external clamping component are set up in conjunction with a first moving frame to achieve external clamping and fixing of the thin-walled parts. Through the curvature of the multiple first arc-shaped frames themselves and the meshing transmission of the first helical gear disk and the first bevel gear, the first screw can be driven to rotate, causing the multiple first arc-shaped frames to move closer to the center at the same time, thereby clamping the thin-walled parts from the outside. While accurately positioning the center of the thin-walled parts, the device also initially reduces clamping indentations and damage to the thin-walled parts by increasing the external clamping contact area.

[0016] 2. In this precision milling and turning composite machining device for thin-walled parts, an internal clamping assembly is set up to clamp the inside of the thin-walled part. Through the transmission of the second helical gear and the second bevel gear, the second screw can be driven to rotate, causing multiple second arc-shaped frames to move outward simultaneously. The arc surface of the second arc-shaped frame can adapt to the inner wall curvature of the rotating thin-walled part. Furthermore, the inner and outer clamping positions of the second arc-shaped frame and the first arc-shaped frame coincide, so that while clamping and fixing the thin-walled part, the deformation pressure on the thin-walled part can be effectively offset. This makes the thin-walled part less prone to indentation or damage due to clamping pressure during the clamping and positioning process of milling and turning.

[0017] 3. In this precision milling and turning composite machining device for thin-walled parts, by setting up stabilizing components and limiting components, the device can stably clamp thin-walled parts of different heights and specifications. By rotating the adjusting bolt in conjunction with the threaded cylinder and multi-stage telescopic rod, the third arc frame can be moved upward, thereby cooperating with the first and second arc frames to clamp the thin-walled parts. This allows the third arc frame to clamp and fix the thin-walled parts from a higher position, making it less likely for the upper end face of the high-height thin-walled parts to twist and deform due to lack of support during milling and turning, further increasing the safety of milling and turning thin-walled parts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixture platform structure of the present invention; Figure 3 This is a schematic cross-sectional view of the clamping frame of the present invention; Figure 4 This is a schematic diagram of the rubber flexible plate and sealing plate structure of the present invention; Figure 5 This is a schematic diagram of the first and second movable frames of the present invention; Figure 6 This is a cross-sectional view of the first and second helical toothed disks of the present invention. Figure 7 This is a schematic diagram of the first screw and the second screw structure of the present invention; Figure 8 This is a schematic cross-sectional view of the unfolded third arc-shaped frame of the present invention; Figure 9 This is a schematic diagram of the adjusting bolt structure of the present invention.

[0019] The meanings of the labels in the diagram are as follows: 1. Machine tool frame; 2. Fixture table; 3. Clamping frame; 4. First arc-shaped frame; 5. Sliding groove; 6. First moving frame; 7. Synchronization assembly; 8. Internal clamping assembly; 9. External clamping assembly; 10. Rubber flexible plate; 11. Sealing plate; 12. Bearing seat; 13. Sliding rod; 14. Stabilizing assembly; 15. Limiting assembly; 16. Guide rail; 17. Gantry frame; 18. Thin-walled part; 71. First helical gear disc; 72. First worm gear; 73. First worm; 74. First bevel gear; 75. First screw; 81. Second arc-shaped frame; 82. Second movable frame; 83. Threaded cylinder; 84. Second helical gear disc; 85. Connecting rod; 86. Second worm gear; 87. Second worm; 88. Second bevel gear; 89. Second screw; 141. Third arc-shaped frame; 142. Telescopic rod; 143. Adjusting bolt; 151. Cavity; 152. Upper gear plate; 153. Lower gear plate; 154. Fastening spring. Detailed Implementation

[0020] 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.

[0021] Existing precision milling and turning composite machining equipment for thin-walled parts can cause indentations or damage to rotating thin-walled parts during clamping and fixing, and can also easily cause twisting damage to rotating thin-walled parts due to pressure.

[0022] Therefore, the present invention provides a precision turning and milling composite machining device for thin-walled parts. See below. Figure 1 As shown, it includes a machine tool frame 1, a guide rail 16 is fixedly connected to the outer surface of the machine tool frame 1, a gantry frame 17 is fixedly installed on the outer surface of the guide rail 16, and a thin-walled part 18 is provided above the fixture table 2. During operation, the gantry 17 can be moved left and right via the guide rail 16. Then, in conjunction with the gantry 17 and the milling and turning drill bit on the gantry 17, the milling and turning work of the thin-walled part 18 can be carried out normally.

[0023] In order to initially clamp the thin-walled part 18 from the outside and locate the center position of the thin-walled part 18, so as to facilitate more accurate and stable clamping and fixing of the thin-walled part 18 in the future.

[0024] For details, see Figure 3 , Figure 5 and Figure 6 As shown, an external clamping assembly 9 is provided above the fixture table 2. The external clamping assembly 9 includes a clamping frame 3. A synchronization assembly 7 is provided inside the clamping frame 3. The synchronization assembly 7 includes a first helical gear disk 71. The first helical gear disk 71 is rotatably connected to the inner bottom wall of the clamping frame 3. A first worm gear 72 is fixedly connected to the outer surface of the first helical gear disk 71. A first worm 73 is meshed with the outer surface of the first worm gear 72. A plurality of first bevel gears 74 are meshed with the outer surface of the first helical gear disk 71. A first screw 75 is fixedly connected to the other end of each of the first bevel gears 74. The outer surface of each of the first screws 75 is threadedly connected to the first moving frame 6. During operation, by rotating the first worm 73 in conjunction with the first worm wheel 72, the first helical gear 71 can be driven to rotate. The rotation of the first helical gear 71, in conjunction with the clamping frame 3, can drive multiple first bevel gears 74 to rotate, thereby allowing the first screw 75 to rotate synchronously, driving the first moving frame 6 to move simultaneously, providing power for the subsequent external synchronous clamping of the thin-walled parts 18.

[0025] Further, see Figure 2 , Figure 3 and Figure 4 As shown, the thin-walled part 18 that needs to be machined by turning and milling is moved above the machine tool frame 1. The upper surface of the machine tool frame 1 is fixedly connected to the fixture table 2. Several first arc-shaped frames 4 are provided above the clamping frame 3. Several sliding grooves 5 are opened on the upper surface of the clamping frame 3. Several first moving frames 6 are provided inside the clamping frame 3. During operation, the first movable frame 6 moves in coordination with the clamping frame 3, causing the first arc-shaped frame 4 to move closer to the center position of the clamping frame 3 until the inner wall of the first arc-shaped frame 4 contacts the outer surface of the thin-walled part 18. At this time, the thin-walled part 18 can be initially clamped from the outside, and the center position of the thin-walled part 18 can also be located.

[0026] Further, see Figures 3-7 As shown, when the first arc frame 4 clamps and fixes the thin-walled part 18 from the outside, clamping the thin-walled part 18 from the outside will cause indentations on the thin-walled part 18. In order to avoid indentations on the thin-walled part 18, an internal clamping assembly 8 is provided above the fixture table 2. The internal clamping assembly 8 includes several second arc frames 81 and second helical gear disks 84. The second helical gear disks 84 are located above the first helical gear disks 71. The upper surface of the second moving frame 82 and the upper surface of the first moving frame 6 are both fixedly connected to threaded cylinders 83. The bottom surface of the first arc frame 4 and the bottom surface of the second arc frame 81 are both fixedly connected to the top end of the threaded cylinders 83. The threaded cylinders 83 are slidably connected inside the sliding groove 5. The bottom end of the second helical gear disk 84 is fixedly connected to a connecting rod 85. The connecting rod 85 is rotatably connected inside the first helical gear disk 71. The bottom end of the connecting rod 85 is fixedly connected to a second worm gear 86. The outer surface of the second worm gear 86 is meshed with a second worm 87. During operation, manually rotating the second worm gear 87 can drive the second worm wheel 86 to rotate, which in turn can drive the second helical gear plate 84 to rotate through the connecting rod 85, providing the necessary power for the subsequent movement of the second moving frame 82.

[0027] Further, see Figures 5-7 As shown, in order to ensure that the clamping position and force of the second arc frame 81 and the first arc frame 4 are balanced and that the second arc frame 81 moves synchronously, the second helical gear disk 84 is rotatably connected to the inner top wall of the clamping frame 3. The bottom surface of the second arc frame 81 is in contact with the upper surface of the clamping frame 3. Several second moving frames 82 are provided inside the clamping frame 3. Several second bevel gears 88 are meshed on the outer surface of the second helical gear disk 84. The other end of each second bevel gear 88 is fixedly connected to a second screw 89. The outer surface of each second screw 89 is threadedly connected to the second moving frame 82. During operation, when the second helical gear disk 84 rotates, it can drive the second bevel gear 88 to rotate, so that the second bevel gear 88 can drive the second moving frame 82, the threaded cylinder 83, and the second arc frame 81 to approach the inner wall of the thin-walled part 18 through the second screw 89, until the outer surface of the second arc frame 81 contacts the inner wall of the thin-walled part 18, thus completing the clamping work inside the thin-walled part 18.

[0028] Further, see Figure 3 , Figure 4 and Figure 7As shown, in order to prevent impurities such as iron filings from entering the clamping frame 3 through the sliding groove 5, two rubber soft plates 10 are fixedly connected to the inner wall of each sliding groove 5. One side of each rubber soft plate 10 is in contact with the outer surface of the threaded cylinder 83. A sealing plate 11 is fixedly connected to the outer surface of each threaded cylinder 83. The sealing plates 11 are slidably connected inside the sliding groove 5. The upper surface of the sealing plate 11 is in contact with the bottom surface of the rubber soft plate 10. During operation, the elasticity and flexibility of the rubber flexible plate 10 can seal the sliding groove 5 without affecting the smooth sliding of the threaded cylinder 83 inside the sliding groove 5. At the same time, the sealing plate 11 slides inside the sliding groove 5 to seal the gap between the threaded cylinder 83 and the rubber flexible plate 10, further preventing impurities such as iron filings from entering the clamping frame 3.

[0029] Further, see Figure 5 and Figure 7 As shown, in order to stably limit the positions of the second screw 89 and the first screw 75, a sliding rod 13 is fixedly connected to the opposite side of each bearing seat 12, and the inner wall of the first moving frame 6 and the inner wall of the second moving frame 82 are slidably connected to the outer surface of the sliding rod 13. During operation, the bearing housing 12 can restrict the position of the first screw 75 and the second screw 89 without affecting their rotation, and thus also restrict the position of the first bevel gear 74 and the second bevel gear 88, so that the first bevel gear 74 and the second bevel gear 88 can mesh with the first helical gear disk 71 and the second helical gear disk 84 respectively.

[0030] Among them, see Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, in order to increase the clamping stability of thin-walled parts 18 of different heights and improve the stability of milling the upper end face of thin-walled parts 18, a stabilizing component 14 is provided above the fixture table 2. The stabilizing component 14 includes several third arc-shaped frames 141. The bottom surface of the third arc-shaped frame 141 is in contact with the upper surface of the corresponding first arc-shaped frame 4 and second arc-shaped frame 81. Telescopic rods 142 are symmetrically arranged on both sides of the bottom of the third arc-shaped frame 141. The third arc-shaped frame 141 is connected to the corresponding first arc-shaped frame 4 and second arc-shaped frame 81 through the telescopic rods 142. The inner wall of the first arc-shaped frame 4 and the inner wall of each second arc-shaped frame 81 are threaded with adjusting bolts 143. The outer surface of the adjusting bolts 143 is rotatably connected to the third arc-shaped frame 141. The adjusting bolts 143 are threadedly connected to the threaded cylinder 83. During operation, when the thin-walled part 18 is too high and the first arc frame 4 and the second arc frame 81 cannot securely fix the upper surface of the thin-walled part 18, simply turn the adjusting bolt 143 with the inside wrench. As the adjusting bolt 143 unscrews the threaded cylinder 83, the third arc frame 141 can be forced to move upward and unfold. At the same time, the telescopic rod 142 can assist the third arc frame 141 to move upward and prevent the third arc frame 141 from rotating, thereby clamping and fixing the upper part of the thin-walled part 18.

[0031] Further, see Figure 8 and Figure 9 As shown, in order to improve the stability of the third arc frame 141 after the adjusting bolt 143 drives the height adjustment, and to prevent the adjusting bolt 143 from loosening due to vibration and shaking, a limit component 15 is provided inside the third arc frame 141. The limit component 15 includes several cavities 151. The cavities 151 are located inside the third arc frame 141. An upper gear plate 152 is provided inside the cavity 151. The inner wall of the upper gear plate 152 is fixedly connected to the outer surface of the adjusting bolt 143. A lower gear plate 153 is slidably connected to the outer surface of the adjusting bolt 143. The upper surface of each lower gear plate 153 is meshed with the bottom surface of the upper gear plate 152. A fastening spring 154 is sleeved on the outer surface of the adjusting bolt 143. The top and bottom ends of the fastening spring 154 are fixedly connected to the upper surface of the lower gear plate 153 and the inner bottom wall of the cavity 151, respectively. During operation, when the adjusting bolt 143 rotates, it drives the upper gear plate 152 to rotate inside the cavity 151, and disengages from the lower gear plate 153 and then re-engages with it, producing a clear clicking sound. Furthermore, after the adjusting bolt 143 rotates, the elastic force provided by the fastening spring 154 ensures that the lower gear plate 153 remains engaged with the upper gear plate 152, thereby fixing the position of the adjusting bolt 143 and preventing the adjusting bolt 143 from loosening due to vibration.

[0032] In summary, this effectively solves the problem that existing precision milling and turning composite machining devices for thin-walled parts 18 cause indentations or damage to rotary thin-walled parts 18 during clamping and fixing, and that rotary thin-walled parts 18 are also prone to twisting and damage due to pressure.

[0033] Working principle: The thin-walled part 18 is placed on the clamping frame 3. Then, the first worm 73 is rotated, so that power is transmitted to the first moving frame 6 through the first worm wheel 72, the first helical gear 71, the first bevel gear 74, and the first screw 75. The first moving frame 6, in conjunction with the threaded cylinder 83, drives the first arc-shaped frame 4 to initially and slightly clamp and fix the thin-walled part 18 from the outside. Then, the second worm 87 is rotated, so that power is transmitted to the second moving frame 82 through the second worm wheel 86, the connecting rod 85, the second helical gear 84, the second bevel gear 88, and the second screw 89. The second moving frame 82 drives the second arc-shaped frame 81 away from the clamping frame through the threaded cylinder 83. The center position of the holder 3 allows the thin-walled part 18 to be further clamped and fixed inside the thin-walled part 18 in conjunction with the first arc-shaped frame 4. When the clamping height needs to be adjusted, simply rotate the adjusting bolt 143 to cooperate with the limit of the telescopic rod 142, and the threaded connection between the threaded cylinder 83, the first arc-shaped frame 4, the second arc-shaped frame 81 and the adjusting bolt 143, so that the third arc-shaped frame 141 can move upward, and cooperate with the first arc-shaped frame 4 and the second arc-shaped frame 81 to clamp and fix the thin-walled parts 18 at different heights. Furthermore, the position of the adjusting bolt 143 after rotation can be positioned by the meshing of the upper gear plate 152 and the lower gear plate 153 in conjunction with the elastic force provided by the fastening spring 154.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision turning and milling composite machining device for thin-walled parts, comprising a machine tool frame (1), characterized in that: The upper surface of the machine tool frame (1) is fixedly connected to a jig table (2), an external clamping component (9) is provided above the jig table (2), an internal clamping component (8) is provided above the jig table (2), a stabilizing component (14) is provided above the jig table (2), and a thin-walled part (18) is provided above the jig table (2). The external clamping assembly (9) includes a clamping frame (3), a synchronization assembly (7) is provided inside the clamping frame (3), a number of first arc-shaped frames (4) are provided above the clamping frame (3), a number of sliding grooves (5) are provided on the upper surface of the clamping frame (3), and a number of first moving frames (6) are provided inside the clamping frame (3). The internal clamping assembly (8) includes several second arc-shaped frames (81) and a second helical toothed disc (84), the second helical toothed disc (84) being rotatably connected to the inner top wall of the clamping frame (3); The stabilizing component (14) includes a plurality of third arc-shaped frames (141), the bottom surface of which is in contact with the upper surface of the corresponding first arc-shaped frame (4) and second arc-shaped frame (81).

2. The precision turning and milling composite machining device for thin-walled parts according to claim 1, characterized in that: The synchronization component (7) includes a first helical gear disk (71), which is rotatably connected to the inner bottom wall of the clamping frame (3). A first worm gear (72) is fixedly connected to the outer surface of the first helical gear disk (71). A first worm (73) is meshed with the outer surface of the first worm gear (72). A plurality of first bevel gears (74) are meshed with the outer surface of the first helical gear disk (71). A first screw (75) is fixedly connected to the other end of each of the first bevel gears (74). The outer surface of each of the first screws (75) is threadedly connected to the first moving frame (6).

3. The precision turning and milling composite machining device for thin-walled parts according to claim 2, characterized in that: The second helical gear disk (84) is positioned above the first helical gear disk (71). The bottom surface of the second arc-shaped frame (81) is in contact with the upper surface of the clamping frame (3). The clamping frame (3) is provided with several second movable frames (82). Several second bevel gears (88) are meshed on the outer surface of the second helical gear disk (84). The other end of each of the second bevel gears (88) is fixedly connected to a second screw (89). The outer surface of each of the second screws (89) is threadedly connected to the second movable frame (82).

4. The precision turning and milling composite machining device for thin-walled parts according to claim 3, characterized in that: The upper surface of the second movable frame (82) and the upper surface of the first movable frame (6) are both fixedly connected to a threaded cylinder (83). The bottom surface of the first arc frame (4) and the bottom surface of the second arc frame (81) are both fixedly connected to the top end of the threaded cylinder (83). The threaded cylinder (83) is slidably connected inside the sliding groove (5). The bottom end of the second helical gear disk (84) is fixedly connected to a connecting rod (85). The connecting rod (85) is rotatably connected inside the first helical gear disk (71). The bottom end of the connecting rod (85) is fixedly connected to a second worm gear (86). The outer surface of the second worm gear (86) is meshed with a second worm (87).

5. The precision turning and milling composite machining device for thin-walled parts according to claim 4, characterized in that: Two rubber flexible plates (10) are fixedly connected to the inner wall of each sliding groove (5). One side of each rubber flexible plate (10) is in contact with the outer surface of the threaded cylinder (83). A sealing plate (11) is fixedly connected to the outer surface of each threaded cylinder (83). The sealing plates (11) are slidably connected inside the sliding groove (5). The upper surface of each sealing plate (11) is in contact with the bottom surface of the rubber flexible plate (10).

6. The precision turning and milling composite machining device for thin-walled parts according to claim 5, characterized in that: Below each of the two adjacent sealing plates (11), there is a set of bearing seats (12), and there are two bearing seats (12) in each set. The second screw (89) and the first screw (75) are rotatably connected inside the bearing seats (12), and the bottom surface of the bearing seats (12) is fixedly connected to the inner bottom wall of the clamping frame (3).

7. The precision turning and milling composite machining device for thin-walled parts according to claim 6, characterized in that: Each bearing seat (12) is fixedly connected to a sliding rod (13) on the opposite side. The inner wall of the first movable frame (6) and the inner wall of the second movable frame (82) are slidably connected to the outer surface of the sliding rod (13).

8. The precision turning and milling composite machining device for thin-walled parts according to claim 4, characterized in that: The bottom sides of the third arc frame (141) are symmetrically provided with telescopic rods (142). The third arc frame (141) is connected to the corresponding first arc frame (4) and second arc frame (81) through the telescopic rods (142). The inner wall of the first arc frame (4) and the inner wall of each second arc frame (81) are threaded with adjusting bolts (143). The outer surface of the adjusting bolts (143) is rotatably connected to the third arc frame (141). The adjusting bolts (143) are threadedly connected to the threaded cylinder (83).

9. The precision turning and milling composite machining device for thin-walled parts according to claim 8, characterized in that: The third arc frame (141) is provided with a limiting component (15) inside. The limiting component (15) includes several cavities (151). The cavities (151) are located inside the third arc frame (141). An upper gear plate (152) is provided inside the cavity (151). The inner wall of the upper gear plate (152) is fixedly connected to the outer surface of the adjusting bolt (143). A lower gear plate (153) is slidably connected to the outer surface of the adjusting bolt (143). The upper surface of each lower gear plate (153) is meshed with the bottom surface of the upper gear plate (152). A fastening spring (154) is sleeved on the outer surface of the adjusting bolt (143). The top and bottom ends of the fastening spring (154) are fixedly connected to the upper surface of the lower gear plate (153) and the inner bottom wall of the cavity (151), respectively.

10. The precision turning and milling composite machining device for thin-walled parts according to claim 1, characterized in that: The outer surface of the machine tool frame (1) is fixedly connected to a guide rail (16), and a gantry frame (17) is fixedly installed on the outer surface of the guide rail (16). In the first state, the first arc-shaped frame (4) moves toward the center of the clamping frame (3) and contacts the outer surface of the thin-walled part (18), and the center of the thin-walled part (18) coincides with the center of the clamping frame (3); In the second state, the second arc-shaped frame (81) slides away from the center of the clamping frame (3) and contacts the inner wall of the thin-walled part (18); In the third state, the third arc frame (141) moves upward, and the corresponding third arc frame (141) above the first arc frame (4) and the second arc frame (81) respectively contacts the outer surface and inner wall of the thin-walled part (18).

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