A precision milling device for automotive parts

Abstract

This invention relates to the field of automotive parts processing technology, and particularly to a precision milling device for automotive parts. The device includes a milling machine body, which includes a worktable; a mounting base connected to the worktable; and a face-changing mechanism connected to the mounting base and used for changing the machined end face of the volute housing. The face-changing mechanism includes a support tube mounted on the upper end of the mounting base, with two guide grooves symmetrically formed along its axis on the tube wall. The clamping mechanism and face-changing mechanism employed in this invention, in conjunction, allow for face-changing of the machined end face without repeated disassembly and reassembly of the volute housing, and are simple and convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, and in particular to a precision milling device for automotive parts. Background Technology

[0002] The turbocharger housing is a component in a car's supercharging system, typically used in conjunction with a turbocharger or supercharger. The main function of a supercharger is to increase the amount of air entering the engine by compressing it, thereby increasing the engine's output power and efficiency without increasing its displacement.

[0003] To ensure the surface finish and dimensional accuracy of the cast volute, milling is required. Existing technology typically uses a milling machine for milling, which is efficient and effective. However, existing volutes require milling multiple end faces. Changing between these end faces often necessitates repeatedly removing and reinstalling the volute from the clamping device, making the process cumbersome. Furthermore, after changing the end faces, datum alignment or tool movement are required, increasing the number of milling steps.

[0004] Therefore, there is an urgent need to provide automatic milling machines that can automatically change faces and quickly align references. Summary of the Invention

[0005] Therefore, it is necessary to provide a precision milling device for automotive parts, which aims to solve the problems caused by existing volutes during milling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a precision milling device for automotive parts, comprising: a milling machine body, wherein the milling machine body includes a worktable.

[0007] It also includes a mounting base that is connected to the workbench.

[0008] It also includes a face-changing mechanism, which is connected to the mounting base and used for changing the machining end face of the volute. The face-changing mechanism includes a support tube installed on the upper end of the mounting base. Two guide grooves are symmetrically opened on the wall of the support tube along its axis. A support part is connected to the bottom of the guide groove. A height adjustment part for adjusting the support height of the support part is connected to the outer surface of the support tube. A limiting part connected to the mounting base is provided on the outside of the support tube.

[0009] The guide groove consists of a V-shaped opening and a rectangular opening.

[0010] It also includes a clamping mechanism connected inside the support tube and used to clamp the volute. The clamping mechanism includes a rotating part connected to the support tube, and a clamping part for clamping the volute and a locking part for locking the clamping part are connected to the rotating part.

[0011] The rotating part includes a rotating rod slidably connected inside the support tube. Two guide rods are symmetrically installed on the outer surface of the rotating rod. A mounting bracket is installed at the upper end of the rotating rod. A lifting rod is slidably connected to both the mounting bracket and the rotating rod.

[0012] When changing surfaces, the guide rod moves along the upper end of the support tube into the guide groove, and the rotating rod drives the mounting frame to descend by its own gravity, so that the baselines of different machined surfaces of the volute are at the same height.

[0013] Preferably, the clamping mechanism further includes a position adjustment section for supporting the clamping part.

[0014] Preferably, the support includes a telescopic rod installed on the bottom wall of the rectangular opening, and a support block that is slidably connected to the rectangular opening is installed at the upper end of the telescopic rod.

[0015] Preferably, the height adjustment part includes an adjustment ring that is slidably sleeved on the support tube and fixedly connected to two support blocks. Multiple positioning holes are evenly distributed from top to bottom at two positions symmetrically along the axis of the outer surface of the support tube. Two positioning rods are symmetrically inserted into the adjustment ring. The positioning rods are inserted into any one of the positioning holes on the same side. Two limit seats with an L-shaped structure and a limit hole in the vertical section are symmetrically installed on the outer ring surface of the adjustment ring.

[0016] Preferably, the limiting part includes two limiting members symmetrically installed on the upper end of the mounting base. Each limiting member has a second limiting hole. A limiting ring for limiting the guide rod is installed on the upper end of the two limiting members. A connecting rod is inserted into the two second limiting holes.

[0017] Preferably, the rotating part further includes a sliding countersunk hole opened at the upper end of the rotating rod for sliding of the lifting rod, a support spring is installed between the bottom wall of the sliding countersunk hole and the lower end of the lifting rod, and the two guide rods and the rotating rod are provided with a common insertion through hole.

[0018] Preferably, the clamping part includes a C-shaped frame installed on the upper end of the lifting rod, a plurality of circumferentially evenly distributed sliding rods are slidably connected through the C-shaped frame, a plurality of guide sleeves that slidably engage with the sliding rods are installed on the inner surface of the C-shaped frame, an arc-shaped clamping plate is installed on the inner end of the sliding rod, and a clamping spring is installed between the outer arc surface of the arc-shaped clamping plate and the guide sleeve.

[0019] Preferably, the clamping part further includes a fixing rod that is fixedly connected to the arc-shaped clamping plate located on the upper side via a connecting rod. A guide frame is installed on one side of the lower end of the fixing rod. An L-shaped support member is slidably connected inside the guide frame. An adjusting screw that is threadedly connected to the upper end of the support member is rotatably connected to the fixing rod.

[0020] Preferably, the locking part includes a locking screw threaded to the upper section of the mounting bracket, a lower pressure plate rotatably connected to the lower end of the locking screw, and guide rods on both sides of the upper sliding rod slidably connected to the lower pressure plate, the guide rods being fixedly connected to the outer surface of the C-shaped frame.

[0021] Preferably, the position adjustment part includes a lifting component that is slidably sleeved on the lifting rod. Two bottom support blocks are symmetrically installed on the upper end of the lifting component. The opposite ends of the two bottom support blocks are provided with inclined surfaces. The opposite ends of the two bottom support blocks are provided with locking holes. Multiple limiting holes are provided on the mounting frame at positions corresponding to the bottom support blocks. Limiting blocks are inserted into the locking holes, and the limiting blocks are engaged with any one of the limiting holes.

[0022] In summary, the present invention has the following beneficial technical effects:

[0023] 1. The clamping mechanism and face-changing mechanism used in this invention can achieve the face-changing function of the processed end face without repeated disassembly and installation of the volute, and the operation is simple and convenient.

[0024] 2. The clamping mechanism used in this invention can clamp and limit the volute housing of different sizes, and uses one drive to achieve multi-point clamping of the volute housing, resulting in good clamping effect and simple operation steps.

[0025] 3. The clamping mechanism and face-changing mechanism used in this invention can automatically move end faces of different heights to the working position during the face-changing process, so that the machining datum of different end faces is consistent. The datum alignment efficiency of different end faces is high, and the milling machine tool does not need to make long-distance displacement in the vertical direction, avoiding the phenomenon of deviation in milling operation and ensuring the effect of shell milling. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0028] Figure 2 A three-dimensional structural schematic diagram of the present invention for removing the milling machine body is shown.

[0029] Figure 3 A front view of the present invention is shown.

[0030] Figure 4 The front view of the present invention for removing the milling machine body is shown.

[0031] Figure 5 A cross-sectional view of the present invention showing the removal of the milling machine body is shown.

[0032] Figure 6 A schematic diagram of the face-changing mechanism of the present invention is shown.

[0033] Figure 7 A schematic diagram of the operation of the present invention is shown.

[0034] The above-mentioned figures include the following reference numerals: 1. Milling machine body; 10. Worktable; 2. Mounting base; 3. Face changing mechanism; 30. Support tube; 31. Guide groove; 310. V-shaped opening; 311. Rectangular opening; 32. Support part; 320. Telescopic rod; 321. Support block; 33. Height adjustment part; 330. Adjusting ring; 331. Positioning hole; 332. Positioning rod; 333. Limiting seat; 334. Limiting hole one; 34. Limiting part; 340. Limiting component; 341. Limiting hole two; 342. Limiting ring; 343. Insertion rod; 4. Clamping mechanism; 40. Rotating part; 400. Rotating rod; 40 1. Guide rod; 402. Mounting bracket; 403. Lifting rod; 404. Sliding countersunk hole; 405. Support spring; 406. Insertion through hole; 41. Clamping part; 410. C-shaped frame; 411. Sliding rod; 412. Guide sleeve; 413. Arc-shaped clamping plate; 414. Clamping spring; 415. Fixing rod; 416. Guide frame; 417. Support piece; 418. Adjusting screw; 42. Locking part; 420. Locking screw; 421. Lower pressure plate; 422. Guide rod; 43. Position adjustment part; 430. Lifting part; 431. Bottom support block; 432. Locking hole; 433. Limiting hole three; 434. Limiting block. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] See Figure 1 and Figure 3 A precision milling device for automotive parts includes a milling machine body 1, wherein the milling machine body 1 includes a worktable 10.

[0037] See Figure 1 and Figure 3 The precision milling device for automotive parts also includes a mounting base 2, which is connected to the worktable 10.

[0038] In actual operation, the milling machine body 1 is fixed in the working position, and then the mounting base 2 is detachably installed on the worktable 10 through the existing positioning mechanism.

[0039] See Figures 1-3 The precision milling device for automotive parts also includes a face-changing mechanism 3, which is connected to the mounting base 2 and used for changing the machining end face of the volute. The face-changing mechanism 3 includes a support tube 30 mounted on the upper end of the mounting base 2.

[0040] See Figures 1-3 The precision milling device for automotive parts also includes a clamping mechanism 4, which is connected inside the support tube 30 and is used to clamp the volute. The clamping mechanism 4 includes a rotating part 40 connected to the support tube 30. The rotating part 40 is connected to a clamping part 41 for clamping the volute and a locking part 42 for locking the clamping part 41. The clamping mechanism 4 also includes a position adjusting part 43 for supporting the clamping part 41.

[0041] In actual operation, the position adjustment part 43 is adjusted according to the size of the volute. The position adjustment part 43 is used to adjust the clamping range of the clamping part 41 so that it matches the size of the volute.

[0042] See Figure 2 , Figure 4 and Figure 5 The rotating part 40 includes a rotating rod 400 slidably connected inside the support tube 30. Two guide rods 401 are symmetrically installed on the outer surface of the rotating rod 400. A mounting bracket 402 is installed on the upper end of the rotating rod 400. A lifting rod 403 is slidably connected to the mounting bracket 402 and the rotating rod 400.

[0043] See Figure 2 , Figure 4 and Figure 5 The position adjustment part 43 includes a lifting component 430 that is slidably sleeved on the lifting rod 403. Two bottom support blocks 431 are symmetrically installed on the upper end of the lifting component 430. The opposite ends of the two bottom support blocks 431 are provided with inclined surfaces. The opposite ends of the two bottom support blocks 431 are provided with locking holes 432. Multiple limiting holes 433 are provided on the mounting bracket 402 at positions corresponding to the bottom support blocks 431. Limiting blocks 434 are inserted into the locking holes 432. The limiting blocks 434 are inserted and engaged with any one of the limiting holes 433.

[0044] In actual operation, before milling the volute, the lifting member 430 is slidable according to the size of the volute. The lifting member 430 can be plate-shaped, rod-shaped or frame-shaped, and there is no unique limitation here. The lifting member 430 drives the two bottom support blocks 431 to move to the corresponding positions. Then, the two limiting blocks 434 are respectively inserted and engaged with the corresponding limiting holes 433 and locking holes 432 to realize the function of limiting the two moving bottom support blocks 431.

[0045] See Figure 2 , Figure 4 , Figure 5 and Figure 6 The support tube 30 has two guide grooves 31 symmetrically opened along its axis on its wall. The guide groove 31 is composed of a V-shaped opening 310 and a rectangular opening 311. The bottom of the guide groove 31 is connected to a support part 32. The support part 32 includes a telescopic rod 320 installed on the bottom wall of the rectangular opening 311. The upper end of the telescopic rod 320 is equipped with a support block 321 that is slidably connected to the rectangular opening 311.

[0046] See Figure 2 , Figure 4 , Figure 5 and Figure 6 The outer surface of the support tube 30 is connected to a height adjustment part 33 for adjusting the support height of the support part 32. The height adjustment part 33 includes an adjustment ring 330 that is slidably sleeved on the support tube 30 and fixedly connected to two support blocks 321. Multiple positioning holes 331 are evenly distributed from top to bottom at two positions symmetrically along the axis of the outer surface of the support tube 30. Two positioning rods 332 are symmetrically inserted into the adjustment ring 330. The positioning rods 332 are inserted into any one of the positioning holes 331 on the same side. Two limit seats 333 with an L-shaped structure and a limit hole 334 in the vertical section are symmetrically installed on the outer ring surface of the adjustment ring 330.

[0047] In actual operation, the adjusting ring 330 is slid up and down according to the distance between the central axis of the volute and the end axis of the transverse section. The adjusting ring 330 drives the two support blocks 321 to slide to the corresponding positions in the two rectangular openings 311. Then, the two positioning rods 332 are respectively inserted through the adjusting ring 330 and connected to the corresponding positioning holes 331 to realize the function of limiting the position of the support blocks 321 after adjustment.

[0048] See Figure 2 , Figure 4 and Figure 5 The rotating part 40 also includes a sliding countersunk hole 404 opened at the upper end of the rotating rod 400 and used for the sliding of the lifting rod 403. A support spring 405 is installed between the bottom wall of the sliding countersunk hole 404 and the lower end of the lifting rod 403. The two guide rods 401 and the rotating rod 400 are provided with a common insertion through hole 406.

[0049] See Figure 2 , Figure 4 and Figure 5 The clamping part 41 includes a C-shaped frame 410 installed on the upper end of the lifting rod 403. A plurality of circumferentially evenly distributed sliding rods 411 are slidably connected through the C-shaped frame 410. A plurality of guide sleeves 412 are installed on the inner surface of the C-shaped frame 410 and are slidably connected through the sliding rods 411. An arc-shaped clamping plate 413 is installed at the inner end of the sliding rod 411. A clamping spring 414 is installed between the outer arc surface of the arc-shaped clamping plate 413 and the guide sleeve 412.

[0050] See Figure 2 , Figure 4 and Figure 5 The clamping part 41 also includes a fixing rod 415 that is fixedly connected to the arc-shaped clamping plate 413 located on the upper side via a connecting rod. A guide frame 416 is installed on one side of the lower end of the fixing rod 415. An L-shaped support member 417 is slidably connected inside the guide frame 416. An adjusting screw 418 that is threadedly connected to the upper end of the support member 417 is rotatably connected to the fixing rod 415.

[0051] In practice, the volute to be milled is placed between multiple arc-shaped clamping plates 413. The inner arc surface of the arc-shaped clamping plates 413 is provided with multiple clamping teeth. The multiple arc-shaped clamping plates 413 initially limit the volute through the clamping teeth. The volute is pressed down by the lifting rod 403 through the C-shaped frame 410. The lifting rod 403 presses down on the support spring 405. The support spring 405 plays a buffering role in the placement of the volute. While the volute is placed between multiple arc-shaped clamping plates 413, its transverse section is positioned between the horizontal section of the support member 417 and the fixed rod 415. Then, the adjusting screw 418 is rotated. The adjusting screw 418 drives the support member 417 to move towards the fixed rod 415 and lifts the transverse section of the volute until the horizontal section of the support member 417 and the fixed rod 415 clamp and limit the transverse section of the volute, ensuring that the end of the transverse section of the volute is in a vertical state.

[0052] See Figure 2 , Figure 4 and Figure 5 The locking part 42 includes a locking screw 420 threadedly connected to the upper section of the mounting bracket 402. The lower end of the locking screw 420 is rotatably connected to a lower pressure plate 421. Guide rods 422 on both sides of the sliding rod 411 located on the upper side are slidably connected to the lower pressure plate 421. The guide rods 422 are fixedly connected to the outer surface of the C-shaped frame 410.

[0053] In actual operation, after the volute is placed between multiple arc-shaped clamping plates 413, the locking screw 420 is rotated. The locking screw 420 causes the lower pressure plate 421 to descend and move along the two guide rods 422. The descending lower pressure plate 421 presses down on the corresponding sliding rod 411. The pressed sliding rod 411, through the corresponding arc-shaped clamping plate 413, causes the volute, other multiple arc-shaped clamping plates 413, and other multiple sliding rods 411 to move downward and fit tightly against the inclined surface on the corresponding bottom support block 431. This achieves the function of multiple sliding rods 411 clamping and limiting the volute through multiple arc-shaped clamping plates 413 (e.g., Figure 7 (As shown).

[0054] See Figure 2 , Figure 4 , Figure 5 and Figure 6 The support tube 30 is provided with a limiting part 34 connected to the mounting base 2 on its outer side. The limiting part 34 includes two limiting members 340 symmetrically installed on the upper end of the mounting base 2. Each of the two limiting members 340 has a limiting hole 341. The upper ends of the two limiting members 340 are jointly installed with a limiting ring 342 for limiting the guide rod 401. A connecting rod 343 is inserted into the two limiting holes 341.

[0055] In specific operation, after the volute is locked and limited, the insertion rod 343 engages with the two limiting holes 341 and the insertion through hole 406 on the two limiting parts 340. At this time, one end face of the locked and limited volute faces the cutting tool of the milling machine body 1. The milling machine body 1 is started, and the milling machine body 1 drives the cutting tool to rotate and feed. The cutting tool performs circular milling on one end face of the volute. After milling one end face of the volute, the volute changes the surface of the machined end face. The guide rod 401 moves along the upper end of the support tube 30 into the guide groove 31. The rotating rod 400 drives the mounting bracket 402 to descend by its own gravity, so that the reference lines of different machined surfaces of the volute are at the same height. The specific steps are as follows: insert the insertion rod 343... 43 separates from the two limiting holes 341 and the insertion through hole 406. Then, the mounting bracket 402 is rotated, and the mounting bracket 402 drives the two guide rods 401 on the rotating rod 400 to move on the support tube 30. At the same time, the limiting ring 342 limits the vertical direction of the guide rods 401. When the rotating rod 400 drives the guide rods 401 to the V-shaped opening 310, the volute, by its own gravity, drives the rotating rod 400 and the guide rods 401 to move downward along the V-shaped opening 310 into the rectangular opening 311. The guide rods 401 move to the upper end of the support block 321. The rectangular opening 311 limits the circumferential direction of the guide rods 401. At this time, the clamping part 41 drives the transverse end of the volute to rotate. Turn the machine to face the cutting tool, then insert the connector 343 into the two limiting holes 334 and the insertion through hole 406 to limit the movement of the volute. When the guide rod 401 moves from the upper end of the support tube 30 to the upper end of the support block 321, the axis of the volute's transverse section end moves downward to the reference position of the cutting tool, eliminating the need for the cutting tool to move up and down and avoiding deviations in the milling of the volute. Then, start the milling machine body 1, which drives the cutting tool to feed and rotate. The cutting tool mills the transverse section end face of the volute. After the transverse section end face of the volute is milled, separate the connector 343 from the two limiting holes 334 and the insertion through hole 406, and then pull the mounting bracket upward. 402 drives the rotating rod 400 to rotate in the same direction. The rotating rod 400 drives the two guide rods 401 to move back to the upper end of the support tube 30 until the insertion through hole 406 is coaxial with the two limiting holes 341 again. Then, the insertion rod 343 is inserted and engaged with the two limiting holes 341 and the insertion through hole 406 to realize the function of limiting the volute that has been changed again. The milling machine body 1 is started. The milling machine body 1 drives the tool to feed and rotate. The tool mills the end face of the volute until all three end faces of the volute are finished. Then, the locking part 42 releases the locking limit of the clamping part 41 and removes the finished volute from the clamping part 41. The volute milling is completed.

[0056] In the description of the embodiments of the present invention, it should be noted that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0057] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A precision milling device for automobile accessories, comprising a milling machine body, the milling machine body comprising a workbench, characterized in that: a mounting seat connected to the workbench; a face changing mechanism connected to the mounting seat and used for changing the end face of a volute, the face changing mechanism comprising a support pipe mounted on the upper end of the mounting seat, two guide grooves symmetrically formed on the wall of the support pipe along the axis of the support pipe, a support portion connected to the bottom of the guide grooves, a height adjusting portion connected to the outer surface of the support pipe and used for adjusting the support height of the support portion, and a limiting portion provided on the outer side of the support pipe and connected to the mounting seat; the guide grooves are composed of V-shaped openings and rectangular openings; a clamping mechanism connected to the support pipe and used for clamping the volute, the clamping mechanism comprising a rotating portion connected to the support pipe, a clamping portion connected to the rotating portion and used for clamping the volute, and a locking portion connected to the rotating portion and used for locking the clamping portion; the rotating portion comprises a rotating rod slidingly connected to the support pipe, two guide rods symmetrically mounted on the outer surface of the rotating rod, a mounting bracket mounted on the upper end of the rotating rod, and a lifting rod slidingly connected to the rotating rod and the mounting bracket; in the case of face changing, the guide rods are moved to the guide grooves along the upper end of the support pipe, the rotating rod drives the mounting bracket to descend through its own gravity, and the reference lines of different processing faces of the volute are at the same height. The clamping mechanism further comprises a position adjusting portion used for supporting the clamping portion. The support portion comprises a telescopic rod mounted on the bottom wall of the rectangular opening, and a support block mounted on the upper end of the telescopic rod and slidingly connected to the rectangular opening. The height adjusting portion comprises an adjusting ring slidingly sleeved on the support pipe and fixedly connected to the two support blocks, a plurality of positioning holes uniformly distributed from top to bottom are formed on the wall of the support pipe along the axis of the support pipe, two positioning rods are symmetrically inserted into the adjusting ring, the positioning rods are inserted into any one of the positioning holes on the same side, and two limiting seats of L-shaped structure and provided with limiting holes one are symmetrically mounted on the outer ring surface of the adjusting ring. The limiting portion comprises two limiting members symmetrically mounted on the upper end of the mounting seat, limiting holes two are formed on the two limiting members, a limiting ring used for limiting the guide rods is jointly mounted on the upper ends of the two limiting members, and a plug-in rod is jointly inserted into the two limiting holes two. The rotating portion further comprises a sliding counterbore formed on the upper end of the rotating rod and used for the sliding of the lifting rod, a support spring is mounted between the bottom wall of the sliding counterbore and the lower end of the lifting rod, and plug-in through holes are formed on the two guide rods and the rotating rod. The clamping portion comprises a C-shaped bracket mounted on the upper end of the lifting rod, a plurality of sliding rods uniformly distributed in the circumferential direction are slidingly and penetratively connected to the C-shaped bracket, a plurality of guide sleeves are mounted on the inner surface of the C-shaped bracket and slidingly and penetratively connected to the sliding rods, arc-shaped clamping plates are mounted on the inner ends of the sliding rods, and clamping springs are mounted between the outer arc surfaces of the arc-shaped clamping plates and the guide sleeves.

2. The precision milling device for automobile accessories as claimed in claim 1, wherein: The clamping portion further comprises a fixed rod fixedly connected to the arc-shaped clamping plate on the upper side through a connecting rod, a guide frame mounted on the lower end of the fixed rod on one side, an L-shaped supporting member slidingly connected to the guide frame, and an adjusting screw threadedly connected to the fixed rod and rotatably connected to the upper end of the supporting member.

3. The precision milling device for automobile accessories as claimed in claim 1, wherein: ​ 4. The precision milling device for automotive parts according to claim 3, characterized in that: ​ 5. The precision milling device for automotive parts as claimed in claim 1 wherein: ​ 6. The precision milling device for automotive parts according to claim 1, wherein: ​ 7. The precision milling device for automotive parts as claimed in claim 6 wherein: ​ 8. The precision milling device for automotive parts according to claim 7, characterized in that: ​ 9. The precision milling device for automotive parts as claimed in claim 7 wherein: The locking part comprises a locking screw threadedly connected to a section of the mounting frame, a lower pressing plate rotatably connected to a lower end of the locking screw, guide rods on both sides of a sliding rod on the upper side of the lower pressing plate and slidingly penetrating the lower pressing plate, and the guide rods are fixedly connected to the outer surface of the C-shaped frame.

10. The precision milling device for automotive parts as claimed in claim 2 wherein: The position adjusting part comprises a lifting piece slidingly sleeved on the lifting rod, two bottom support blocks symmetrically mounted on the upper end of the lifting piece, inclined surfaces arranged at opposite ends of the two bottom support blocks, clamping holes formed at opposite ends of the two bottom support blocks, a plurality of limiting holes three formed at positions corresponding to the bottom support blocks on the mounting frame, and limiting blocks inserted into the clamping holes.

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