Four-axis numerical control machine tool for titanium alloy finish machining

Abstract

The invention discloses a four-axis numerical control machine tool for titanium alloy finish machining, and belongs to the technical field of grinding equipment. Symmetrical grinding tables are arranged at the top of a grinding frame, and a slot is formed between the grinding tables; a lifting frame is movably mounted in the moving frame, a driving rod is arranged at the front end of the lifting frame, a lifting cavity is formed in the top of the moving frame, and a lifting base is movably mounted in the lifting cavity; a linkage shaft is movably mounted at the top of the lifting base, and a polishing roller reciprocating along the slot is arranged at the top of the linkage shaft; symmetrical side rail frames are installed in the moving cavity in a sliding mode, and a base is arranged at the tops of the side rail frames. A rotating arc plate is movably installed on the side wall of the center rail frame, and blowing equipment is installed on the outer wall of the rotating arc plate. When the lifting base moves, the driven gear and the linkage shaft are kept in a linkage meshing state all the time, so that the grinding roller is further driven by the grinding motor to rotate, the grinding roller rotates and grinds along the seam groove while moving up and down, and the grinding effect is improved through the design.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to a four-axis CNC machine tool for finishing titanium alloys. Background Art

[0002] Plates are one of the basic materials for manufacturing titanium alloy parts and are widely used in the manufacture of various equipment. These plates are not only required to have sufficient strength and stability, but also to have a good appearance and feel. Therefore, grinding the plates is an indispensable part of the manufacturing process of titanium alloy parts.

[0003] The Chinese patent application with publication number CN118357802A discloses a plate surface color correction and polishing device, which belongs to the field of polishing devices. The polishing device includes: a support platform frame, a polishing assembly and a replacement assembly. The polishing assembly includes a first vertical frame, a first lifting frame, a first linear slide, a rotating shaft, a driving shaft, a polishing head, a connecting frame and a first motor. The replacement assembly includes a second vertical frame, a support plate, a second lifting frame, a second linear slide, a first telescopic frame, a clamping member, a third lifting frame, a second telescopic frame and a twisting head. A nut is provided at one end of the driving shaft. The rotating end of the twisting head is rotatably connected to the output end of the second telescopic frame. The rotating end of the twisting head is sleeved on the outside of the nut. The polishing heads of different specifications are placed on the upper part of the support plate. During the entire use process, the mechanized replacement of the polishing head is realized, thereby reducing the manual workload.

[0004] However, the grinding effect and degree of freedom of the plate grinding equipment disclosed above are general, the movement mode of the grinding axis cannot be adjusted according to actual needs during operation, and after long-term use, a large amount of metal debris will remain on the surface of the equipment, and there is a lack of a linkage cleaning device. Summary of the invention

[0005] The purpose of the present invention is to provide a four-axis CNC machine tool for titanium alloy finishing in order to solve the problems that the plate grinding equipment in the prior art has a general grinding effect and a general degree of freedom, the movement mode of the grinding shaft cannot be adjusted according to actual needs during operation, a large amount of metal debris will remain on the surface of the equipment after long-term use, and there is a lack of a linked cleaning device.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a four-axis CNC machine tool for titanium alloy finishing, including a grinding frame, a grinding device and a cleaning device, the top of the grinding frame is provided with a symmetrical grinding table, a slit is provided between the grinding tables, and an inclined blanking plate is provided on the outer side of the grinding table; the grinding device includes a motion frame movably arranged inside the grinding frame, a lifting frame is movably installed inside the motion frame, a driving rod is provided at the front end of the lifting frame, a lifting cavity is opened on the top of the motion frame, and a lifting device is movably installed in the lifting cavity A lifting base, wherein a meshing cavity cooperating with the driving rod is provided at the bottom of the lifting base; a linkage shaft is movably installed on the top of the lifting base, and a grinding roller reciprocating along the slot is arranged on the top of the linkage shaft; the cleaning device comprises a central rail frame, wherein a movement cavity is provided inside the central rail frame, symmetrical side rail frames are slidably installed in the movement cavity, and a base flush with the side surface of the central rail frame is arranged on the top of the side rail frame; a rotating arc plate is movably installed on the side wall of the central rail frame, and a blowing device is installed on the outer wall of the rotating arc plate.

[0007] As a further solution of the present invention: a symmetrical cleaning motor is installed on the outer wall of the grinding frame, a cleaning screw is provided at the output end of the cleaning motor, and a movable seat cooperating with the cleaning screw is provided at the bottom of the central rail frame; a moving motor located above the cleaning motor is also installed on the outer wall of the grinding frame, a moving screw is provided at the output end of the moving motor, and a threaded seat cooperating with the moving screw is provided at the bottom of the moving frame.

[0008] As a further solution of the present invention: a swing gear located below the lifting frame is movably installed inside the motion frame, symmetrical eccentric wheels are arranged on both sides of the swing gear, a lifting arm is movably installed in the middle of the lifting frame, and the lifting frame is movably connected to the eccentric wheel through the lifting arm.

[0009] As a further solution of the present invention: a lifting motor is also installed inside the motion frame, and a threaded shaft meshing with the swing gear is provided at the output end of the lifting motor; an upper linkage hoop and a lower linkage hoop are provided on the lifting arm, and the lifting arm is movably connected to the lifting frame through the upper linkage hoop, and the lifting arm is movably connected to the eccentric wheel through the lower linkage hoop.

[0010] As a further solution of the present invention: a support frame is also provided on the top of the moving frame, a driven gear is movably installed on the bottom of the support frame, a hole groove cooperating with the linkage shaft is opened in the middle of the driven gear, a plurality of groups of protrusions are arranged on the inner wall of the hole groove, and a plurality of groups of grooves cooperating with the protrusions are opened on the outer wall of the linkage shaft; a grinding motor is also installed on the top of the moving frame, and a driving gear meshing with the driven gear is installed on the output end of the grinding motor.

[0011] As a further solution of the present invention: a ring groove is provided at the bottom of the support frame, and a ring rail matching with the ring groove is provided at the top of the driven gear; a T-shaped seat is provided at the bottom of the linkage shaft, and a T-shaped cavity matching with the T-shaped seat is provided at the top of the lifting base.

[0012] As a further solution of the present invention: symmetrical relays are installed inside the moving cavity, and magnetic plates cooperating with the relays are installed on the inner walls of the side rail frames; symmetrical mounting holes are opened on the top outer wall of the central rail frame, and a reset structure is connected in the mounting holes, and the top of the reset structure is connected to the base; when the side rail frames on both sides pop out, the rotating arc plate drives the blowing device to clean the grinding frame.

[0013] As a further solution of the present invention: a central rail groove is provided on the side wall of the central rail frame, a side rail groove matching the central rail groove is opened on the outer wall of the base, and a positioning rail is also provided on the inner wall of the rotating arc plate.

[0014] As a further solution of the present invention: a half gear ring is installed on the side of the rotating arc plate, a central motor is installed on the outer wall of the central rail frame, and a central gear meshing with the half gear ring is installed at the output end of the central motor; a side motor is installed on the outer wall of the base, and a side gear intermittently meshing with the half gear ring is installed at the output end of the side motor.

[0015] As a further solution of the present invention: a control panel is installed on the outer wall of the grinding frame, and a collection box is also provided at the bottom of the grinding frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can drive the lifting base to reciprocate along the lifting cavity through the cooperation of the swing gear and the lifting frame. When the lifting base moves, the driven gear and the linkage shaft always maintain a linkage meshing state under the cooperation of the protrusion and the groove, so as to further drive the grinding roller to rotate through the grinding motor. At this time, the grinding roller moves up and down along the slot while rotating and grinding. This design improves the grinding effect and practicality of the four-axis CNC machine tool for titanium alloy finishing.

[0017] 2. The angle between the bases on both sides of the present invention is less than or equal to 180 degrees in the initial state, so that titanium alloy plates of different specifications can be located inside the cleaning device. When the relay is turned off, the side rails automatically pop up under the action of the reset structures on both sides, and the angle between the bases on both sides is greater than 180 degrees. Since the angle of the rotating arc plate is less than 180 degrees, the rotating arc plate can be driven by the central motor and the side motors on both sides to rotate around the central rail and the side rail, so that the titanium alloy plate can be cleaned multiple times by the blowing device. This design improves the cleaning effect of the four-axis CNC machine tool used for titanium alloy finishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a three-dimensional structural diagram of the present invention; Figure 2 It is a three-dimensional structural diagram of the grinding frame in the present invention; Figure 3 It is a three-dimensional structural diagram of the grinding device in the present invention; Figure 4 It is a three-dimensional structural diagram of the motion frame in the present invention; Figure 5 The internal three-dimensional structure of the grinding device in the present invention Figure 1 ; Figure 6 The internal three-dimensional structure of the grinding device in the present invention Figure 2 ; Figure 7 It is a three-dimensional structural diagram of the cleaning device in the present invention; Figure 8 It is the three-dimensional structure of the central rail frame in the present invention Figure 1 ; Fig. 9 It is the three-dimensional structure of the central rail frame in the present invention Figure 2 ; Fig.10 It is a three-dimensional structural diagram of the side rail frame of the present invention; Fig.11 It is a three-dimensional structural diagram of the rotating arc plate in the present invention.

[0019] Description of reference numerals: 1. Grinding rack; 101. Cleaning motor; 102. Cleaning screw; 103. Moving motor; 104. Moving screw; 105. Control panel; 106. Collection box; 107. Grinding table; 108. Slot; 109. Unloading plate; 2. Grinding equipment; 201. Moving frame; 202. Threaded seat; 203. Swinging gear; 204. Lifting motor; 205. Threaded shaft; 206. Eccentric wheel; 207. Lifting frame; 208. Lifting arm; 209. Upper linkage hoop; 210. Lower linkage hoop; 211. Driving rod; 212. Lifting cavity; 213. Lifting base; 214. Engaging cavity; 215. Linkage shaft; 216. T-shaped seat; 217. T-shaped cavity; 218. Grinding roller; 219. Support frame; 220. Driven gear; 221. Ring groove; 222. Ring rail; 223. Hole groove; 224. Bump; 225. Groove; 226. Grinding motor; 227. Driving gear; 3. Cleaning equipment; 301. Center rail frame; 302. Moving seat; 303. Moving cavity; 304. Side rail frame; 305. Base; 306. Relay; 307. Magnetic plate; 308. Mounting hole; 309. Reset structure; 310. Rotating arc plate; 311. Positioning rail; 312. Center rail groove; 313. Side rail groove; 314. Half gear ring; 315. Center motor; 316. Center gear; 317. Side motor; 318. Side gear; 319. Blowing equipment. DETAILED DESCRIPTION

[0020] The following will be combined with the attached Figures 1 to 11 The technical solution of the present invention is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention provides a four-axis CNC machine tool for titanium alloy finishing through improvement, such as Figure 1-Figure 11As shown, it includes a grinding frame 1, a grinding device 2 and a cleaning device 3. The top of the grinding frame 1 is provided with symmetrical grinding tables 107, and slots 108 are provided between the grinding tables 107. The outer side of the grinding table 107 is provided with an inclined blanking plate 109; the grinding device 2 includes a moving frame 201 movably arranged inside the grinding frame 1, and a lifting frame 207 is movably installed inside the moving frame 201. A driving rod 211 is provided at the front end of the lifting frame 207. A lifting cavity 212 is provided on the top of the moving frame 201, and a lifting base 213 is movably installed in the lifting cavity 212. The bottom of the lifting base 213 is provided with a driving rod 211. The rod 211 cooperates with the meshing cavity 214; a linkage shaft 215 is movably installed on the top of the lifting base 213, and a grinding roller 218 that reciprocates along the slot 108 is arranged on the top of the linkage shaft 215; the cleaning device 3 includes a central rail frame 301, a movement cavity 303 is opened inside the central rail frame 301, and symmetrical side rail frames 304 are slidably installed in the movement cavity 303, and a base 305 flush with the side of the central rail frame 301 is arranged on the top of the side rail frame 304; a rotating arc plate 310 is movably installed on the side wall of the central rail frame 301, and a blowing device 319 is installed on the outer wall of the rotating arc plate 310.

[0022] In this embodiment: the four-axis CNC machine tool for titanium alloy finishing is mainly divided into three parts: a grinding frame 1, a grinding device 2 and a cleaning device 3. When the device is in use, the titanium alloy plate to be polished is first placed on the grinding table 107, and then the lifting motor 204 and the grinding motor 226 are started. When the swing gear 203 rotates, the lifting base 213 will drive the top linkage shaft 215 and the grinding roller 218 to reciprocate up and down along the lifting chamber 212. Under the cooperation of the protrusion 224 and the groove 225, the driven gear 220 and the linkage shaft 215 always maintain a linkage meshing state, and at this time, the grinding roller 218 moves up and down along the slot 108 while rotating and grinding. After the operation is completed, the relay 306 is turned off. At this time, the side rail frames 304 on both sides automatically pop up under the action of the reset structure 309. The central motor 315 and the side motors 317 on both sides are driven in relay, so the rotating arc plate 310 drives the blowing device 319 to rotate around the central rail frame 301 and the base 305 and clean the surface of the grinding table 107. At this time, the grinding debris falls into the collection box 106 below through the slot 108 and the blanking plate 109.

[0023] See attached Figure 2 -Attached Figure 3 and attached Figure 7A symmetrical cleaning motor 101 is installed on the outer wall of the grinding frame 1, and a cleaning screw 102 is provided at the output end of the cleaning motor 101, and a moving seat 302 cooperating with the cleaning screw 102 is provided at the bottom of the central rail frame 301; a motion motor 103 located above the cleaning motor 101 is also installed on the outer wall of the grinding frame 1, and a motion screw 104 is provided at the output end of the motion motor 103, and a threaded seat 202 cooperating with the motion screw 104 is provided at the bottom of the motion frame 201.

[0024] In this embodiment, when grinding the side of the plate, a moving motor 103 is designed to drive the grinding device 2 to reciprocate along the slot 108. When the through hole needs to be ground, the moving motor 103 is turned off, and the grinding device 2 no longer moves along the slot 108. During the grinding operation, debris will fall on the grinding frame 1 and the grinding table 107. In order to clean them in all directions and at multiple angles, a cleaning motor 101 is designed.

[0025] See attached Figure 3 and attached Figure 5 -Attached Figure 6 A swing gear 203 located below the lifting frame 207 is movably installed inside the moving frame 201, and symmetrical eccentric wheels 206 are arranged on both sides of the swing gear 203. A lifting arm 208 is movably installed in the middle of the lifting frame 207, and the lifting frame 207 is movably connected to the eccentric wheel 206 through the lifting arm 208.

[0026] In this embodiment, when the swing gear 203 rotates, the eccentric wheels 206 on both sides will also rotate accordingly, and since the lifting frame 207 is movably connected to the eccentric wheels 206 through the lifting arm 208, the lifting frame 207 will also swing back and forth. The bottom of the lifting base 213 is provided with a meshing cavity 214 that cooperates with the driving rod 211, so when the lifting frame 207 swings, the lifting base 213 will drive the linkage shaft 215 and the grinding roller 218 on the top to reciprocate up and down along the lifting cavity 212.

[0027] See attached Figure 4 -Attached Figure 6 A lifting motor 204 is also installed inside the motion frame 201, and a threaded shaft 205 meshing with the swing gear 203 is provided at the output end of the lifting motor 204; an upper linkage hoop 209 and a lower linkage hoop 210 are provided on the lifting arm 208, and the lifting arm 208 is movably connected to the lifting frame 207 through the upper linkage hoop 209, and the lifting arm 208 is movably connected to the eccentric wheel 206 through the lower linkage hoop 210.

[0028] In this embodiment, a lifting motor 204 is provided to drive the swing gear 203 to rotate. An upper linkage hoop 209 and a lower linkage hoop 210 are provided to flexibly connect the upper and lower ends of the lifting arm 208 to the lifting frame 207 and the eccentric wheel 206, respectively.

[0029] See attached Figure 4 -Attached Figure 6 A support frame 219 is also provided on the top of the moving frame 201, and a driven gear 220 is movably installed at the bottom of the support frame 219. A hole groove 223 cooperating with the linkage shaft 215 is opened in the middle of the driven gear 220, and a plurality of groups of protrusions 224 are arranged on the inner wall of the hole groove 223, and a plurality of groups of grooves 225 cooperating with the protrusions 224 are arranged on the outer wall of the linkage shaft 215; a grinding motor 226 is also installed on the top of the moving frame 201, and a driving gear 227 meshing with the driven gear 220 is installed at the output end of the grinding motor 226.

[0030] In this embodiment, in order to drive the linkage shaft 215 and the grinding roller 218 to rotate, a driven gear 220 is designed to always be linked and meshed with the linkage shaft 215. When the lifting base 213 reciprocates up and down, the protrusion 224 on the driven gear 220 always slides along the groove 225 on the outer wall of the linkage shaft 215. In order to drive the driven gear 220 and the grinding roller 218 to rotate, a grinding motor 226 structure is designed.

[0031] See attached Figure 4 -Attached Figure 6 A ring groove 221 is provided at the bottom of the support frame 219, and a ring rail 222 matching the ring groove 221 is provided at the top of the driven gear 220; a T-shaped seat 216 is provided at the bottom of the linkage shaft 215, and a T-shaped cavity 217 matching the T-shaped seat 216 is provided at the top of the lifting base 213.

[0032] In this embodiment, in order to ensure that the driven gear 220 is rotatably arranged at the bottom of the support frame 219, a mutually matching annular groove 221 and annular rail 222 structure is designed. In order to install the linkage shaft 215 on the lifting base 213 and ensure its stability during rotation, a mutually matching T-shaped seat 216 and T-shaped cavity 217 structure is designed.

[0033] See attached Figure 7 -Attached Fig.10A symmetrical relay 306 is installed inside the motion cavity 303, and a magnetic plate 307 cooperating with the relay 306 is installed on the inner wall of the side rail frame 304; symmetrical mounting holes 308 are opened on the top outer wall of the central rail frame 301, and a reset structure 309 is connected in the mounting hole 308, and the top of the reset structure 309 is connected to the base 305; when the side rail frames 304 on both sides pop out, the rotating arc plate 310 drives the blowing device 319 to clean the grinding frame 1.

[0034] In this embodiment: in the initial state, the relay 306 is activated and fixes and adsorbs the side rails 304 on both sides. At this time, the reset structure 309 is compressed, and the side rails 304 on both sides are contracted in the motion cavity 303. The angle between the bases 305 on both sides is equal to 180 degrees in the initial state. When the relay 306 is closed, the side rails 304 on both sides automatically pop up under the action of the reset structure 309. At this time, the central rail 301 and the side rails 304 on both sides form a circular rail with an angle greater than 180 degrees for the rotating arc plate 310 to rotate.

[0035] See attached Fig. 9 -Attached Fig.11 A center rail groove 312 is provided on the side wall of the center rail frame 301, a side rail groove 313 matching the center rail groove 312 is opened on the outer wall of the base 305, and a positioning rail 311 is also provided on the inner wall of the rotating arc plate 310; a half gear ring 314 is installed on the side of the rotating arc plate 310, a center motor 315 is installed on the outer wall of the center rail frame 301, and a center gear 316 meshing with the half gear ring 314 is installed at the output end of the center motor 315; a side motor 317 is installed on the outer wall of the base 305, and a side gear 318 intermittently meshing with the half gear ring 314 is installed at the output end of the side motor 317.

[0036] In this embodiment, since the angle of the rotating arc plate 310 is slightly less than 180 degrees, when the side rail frame 304 pops out, the angle between the bottom center motor 315 and the side motors 317 on both sides is about 120 degrees. Therefore, through the relay drive of the center motor 315 and the side motors 317 on both sides, there is always a center gear 316 or a side gear 318 meshing with the half gear ring 314, so the rotating arc plate 310 can circulate around the center rail frame 301 and the base 305.

[0037] See attached Figure 1 -Attached Figure 2 A control panel 105 is installed on the outer wall of the grinding frame 1, and a collection box 106 is also provided at the bottom of the grinding frame 1.

[0038] In this embodiment, a control panel 105 is provided to control the operation of the device. A collection box 106 is provided to collect the debris dropped after blowing.

[0039] Working principle of the present invention: When the device is used, the titanium alloy plate to be polished is first placed on the polishing table 107, and then the lifting motor 204 and the polishing motor 226 are started. When the swing gear 203 rotates, the lifting base 213 will drive the linkage shaft 215 and the polishing roller 218 at the top to reciprocate up and down along the lifting chamber 212. Under the cooperation of the protrusion 224 and the groove 225, the driven gear 220 and the linkage shaft 215 always maintain a linkage meshing state, and at this time, the polishing roller 218 moves up and down along the slot 108 while rotating and polishing. After the operation is completed, the relay 306 is turned off, and at this time, the side rails 304 on both sides automatically pop up under the action of the reset structure 309. Then, the central motor 315 and the side motors 317 on both sides are relay-driven, so that the rotating arc plate 310 drives the blowing device 319 to rotate around the central rail 301 and the base 305 and clean the surface of the polishing table 107. At this time, the grinding chips fall into the collecting box 106 below through the slot 108 and the blanking plate 109 .

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. A four-axis CNC machine tool for finishing titanium alloy, comprising a grinding frame (1), a grinding device (2) and a cleaning device (3), characterized in that: The top of the grinding frame (1) is provided with symmetrical grinding tables (107), slots (108) are provided between the grinding tables (107), and an inclined blanking plate (109) is provided on the outside of the grinding tables (107); The grinding device (2) comprises a moving frame (201) movably arranged inside the grinding frame (1), a lifting frame (207) movably installed inside the moving frame (201), a driving rod (211) being arranged at the front end of the lifting frame (207), a lifting cavity (212) being provided at the top of the moving frame (201), a lifting base (213) being movably installed in the lifting cavity (212), and a meshing cavity (214) cooperating with the driving rod (211) being provided at the bottom of the lifting base (213); a linkage shaft (215) being movably installed at the top of the lifting base (213), and a grinding roller (218) being arranged at the top of the linkage shaft (215) for reciprocating along the slot (108); The cleaning device (3) comprises a central rail frame (301), a movement cavity (303) is provided inside the central rail frame (301), symmetrical side rail frames (304) are slidably mounted inside the movement cavity (303), and a base (305) flush with the side surface of the central rail frame (301) is provided on the top of the side rail frame (304); a rotating arc plate (310) is movably mounted on the side wall of the central rail frame (301), and a blowing device (319) is mounted on the outer wall of the rotating arc plate (310).

2. A four-axis CNC machine tool for titanium alloy finishing according to claim 1, characterized in that: A symmetrical cleaning motor (101) is mounted on the outer wall of the grinding frame (1); a cleaning screw (102) is arranged at the output end of the cleaning motor (101); a movable seat (302) cooperating with the cleaning screw (102) is arranged at the bottom of the central rail frame (301); a motion motor (103) located above the cleaning motor (101) is also mounted on the outer wall of the grinding frame (1); a motion screw (104) is arranged at the output end of the motion motor (103); and a threaded seat (202) cooperating with the motion screw (104) is arranged at the bottom of the motion frame (201).

3. A four-axis CNC machine tool for titanium alloy finishing according to claim 1, characterized in that: A swing gear (203) located below the lifting frame (207) is also movably mounted inside the motion frame (201); symmetrical eccentric wheels (206) are arranged on both sides of the swing gear (203); a lifting arm (208) is movably mounted in the middle of the lifting frame (207); and the lifting frame (207) is movably connected to the eccentric wheel (206) via the lifting arm (208).

4. A four-axis CNC machine tool for titanium alloy finishing according to claim 3, characterized in that: A lifting motor (204) is also installed inside the motion frame (201), and a threaded shaft (205) meshing with the swing gear (203) is provided at the output end of the lifting motor (204); an upper linkage hoop (209) and a lower linkage hoop (210) are provided on the lifting arm (208), and the lifting arm (208) is movably connected to the lifting frame (207) via the upper linkage hoop (209), and the lifting arm (208) is movably connected to the eccentric wheel (206) via the lower linkage hoop (210).

5. A four-axis CNC machine tool for titanium alloy finishing according to any one of claims 1 to 4, characterized in that: A support frame (219) is also provided on the top of the motion frame (201), and a driven gear (220) is movably mounted on the bottom of the support frame (219); a hole groove (223) cooperating with the linkage shaft (215) is provided in the middle of the driven gear (220), and a plurality of groups of protrusions (224) are provided on the inner wall of the hole groove (223); and a plurality of groups of grooves (225) cooperating with the protrusions (224) are provided on the outer wall of the linkage shaft (215); a grinding motor (226) is also mounted on the top of the motion frame (201), and a driving gear (227) meshing with the driven gear (220) is mounted on the output end of the grinding motor (226).

6. A four-axis CNC machine tool for titanium alloy finishing according to claim 5, characterized in that: The bottom of the support frame (219) is provided with an annular groove (221), and the top of the driven gear (220) is provided with an annular rail (222) that cooperates with the annular groove (221); the bottom of the linkage shaft (215) is provided with a T-shaped seat (216), and the top of the lifting base (213) is provided with a T-shaped cavity (217) that cooperates with the T-shaped seat (216).

7. The four-axis CNC machine tool for titanium alloy finishing according to claim 1, characterized in that: Symmetrical relays (306) are installed inside the movement cavity (303), and magnetic plates (307) that cooperate with the relays (306) are installed on the inner wall of the side rail frame (304); symmetrical mounting holes (308) are opened on the top outer wall of the central rail frame (301), and a reset structure (309) is connected inside the mounting hole (308), and the top of the reset structure (309) is connected to the base (305); when the side rail frames (304) on both sides pop out, the rotating arc plate (310) drives the blowing device (319) to clean the grinding frame (1).

8. The four-axis CNC machine tool for titanium alloy finishing according to claim 1, characterized in that: A central rail groove (312) is provided on the side wall of the central rail frame (301), a side rail groove (313) matching the central rail groove (312) is provided on the outer wall of the base (305), and a positioning rail (311) is also provided on the inner wall of the rotating arc plate (310).

9. A four-axis CNC machine tool for titanium alloy finishing according to claim 8, characterized in that: A half gear ring (314) is installed on the side of the rotating arc plate (310); a central motor (315) is installed on the outer wall of the central rail frame (301); a central gear (316) meshing with the half gear ring (314) is installed at the output end of the central motor (315); a side motor (317) is installed on the outer wall of the base (305); a side gear (318) intermittently meshing with the half gear ring (314) is installed at the output end of the side motor (317).

10. A four-axis CNC machine tool for titanium alloy finishing according to any one of claims 1 to 4, characterized in that: A control panel (105) is installed on the outer wall of the grinding frame (1), and a collection box (106) is also provided at the bottom of the grinding frame (1).

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